JP2010261550A - Bag body and manufacturing method thereof - Google Patents

Abstract

To provide a bag body having a high sealing property over a long period of time.
One outer cover material having a heat-welded layer on one side is folded in half, and at least one side connected to the bent portion has a side 31 which is thermally welded, and the remaining sides 34B and 34C are filled. In a bag serving as an opening into which the object 2 is put, a cross section when the heat welded portion is cut by a plane perpendicular to the heat welded side 31 at least a part of the side 31 where the outer peripheral portions of the jacket material are heat welded to each other is shown. When viewed, either one of the heat-welded layers of the jacket material located on the heat-welded side 31 has at least two recesses, and the average heat-weld to the deepest heat-weld layer of the recesses A thin groove portion that is thinner than the thickness of the layer and a seal groove portion 33 that is located at both ends of the thin portion and that is thicker than the average thickness of the heat-welded layer are provided, and the remaining side 34B serving as an opening for insertion is provided. 34C, a seal groove 33 is formed.
[Selection] Figure 2

Description

  The present invention relates to a bag body that maintains excellent sealing performance over a long period of time, and a method for manufacturing the bag body.

  In recent years, foods such as confectionery or medicines can be stored in a sealed bag to enable long-term storage, or a fiber body is vacuum sealed in a sealed bag to form a vacuum heat insulating material.

  Here, a vacuum heat insulating material will be described as an example. As measures against global warming, which is a serious global environmental problem, there is an active movement to promote energy saving in home appliances, equipment, and buildings such as houses, and vacuum insulation that has an excellent thermal insulation effect over the long term But more than ever.

  The vacuum heat insulating material is a material in which a core material having fine voids such as glass wool or silica powder is covered with a jacket material having gas barrier properties, and the inside of the jacket material is sealed under reduced pressure. The vacuum heat insulating material enables a high heat insulating effect to be exhibited by keeping the inner space of the jacket material at a high vacuum and reducing the amount of heat transmitted through the gas phase as much as possible. Therefore, in order to exhibit the excellent heat insulating effect over a long period of time, a technique for maintaining a high degree of vacuum inside the vacuum heat insulating material (inside the jacket material) is extremely important.

  As a method for maintaining the degree of vacuum inside the vacuum heat insulating material, a method in which a gas adsorbent or a moisture adsorbent is sealed under reduced pressure inside the vacuum heat insulating material together with the core material is generally used. As a result, residual moisture released into the vacuum heat insulating material from the minute gaps in the core material after vacuum packaging, or atmospheric gases such as water vapor and oxygen that permeate through the jacket material from the outside air and permeate into the vacuum heat insulating material over time. Can be removed.

  However, considering the adsorption capacity of existing adsorbents, it can be said that the use of adsorbents alone is insufficient to provide a vacuum insulation material that maintains a high thermal insulation effect over the long term. It is necessary to take measures to control the amount of atmospheric gas that is generated.

  Here, a gas path entering from the outside air into the vacuum heat insulating material will be described.

  The vacuum heat insulating material is, for example, a core material placed at a position slightly deviated from the center of the outer jacket material, the outer jacket material is folded back so as to wrap the core material, and the two sides of the outer circumference of the outer jacket material are thermally welded, It is manufactured by thermally welding the opening of the bag while evacuating the bag inside the jacket material.

  The outer cover material is usually a heat-welded layer made of a thermoplastic resin such as low density polyethylene in the innermost layer, a gas barrier layer made of a material having a barrier property such as an aluminum foil or an aluminum vapor deposited film in the intermediate layer, and an outermost layer in the outer layer. Uses a laminated film obtained by laminating a surface protective layer such as a nylon film or a polyethylene terephthalate film through an adhesive.

  In this case, the atmospheric gas that permeates from the outside air into the vacuum heat insulating material is a component that permeates through the pinholes of the aluminum foil on the surface of the jacket material or the gaps between the vapor deposition layers, and the heat-welded layer on the edge surface of the jacket material. Are classified into two types, that is, a component that penetrates from the exposed portion to the inside through the sealing portion.

  Of these, the thermoplastic resin constituting the heat-welded layer has extremely high gas permeability and moisture permeability compared to the gas barrier layer. Most of the material is transmitted through the sealing portion to the inside from the exposed portion of the heat-welded layer on the end surface of the peripheral edge of the workpiece.

  Therefore, in order to provide a vacuum heat insulating material having excellent heat insulating performance over a long period of time, it is indispensable to suppress the amount of atmospheric gas permeation from the portion where the heat-welded layer on the edge surface of the outer jacket material is exposed. Techniques have been a challenge.

  In response to this problem, there has been reported a vacuum heat insulating material in which a fin-like protrusion formed by heat welding the heat welding layers is not formed on one side of the outer periphery of the vacuum heat insulating material (see, for example, Patent Document 1). .

  FIG. 12 is a perspective view showing a manufacturing process of the conventional vacuum heat insulating material described in Patent Document 1. FIG. FIG. 13 is an enlarged cross-sectional view of a portion where a jacket material of a conventional vacuum heat insulating material described in Patent Document 1 is bent.

  The vacuum heat insulating material is obtained by placing the filling 112 at a position slightly deviated from the center of the covering material 111, bending the covering material 111 so as to wrap the filling 112, and thermally welding the three sides of the outer periphery of the covering material 111. The fin-like protrusions formed by heat welding the heat-welding layers are not formed on one side of the outer periphery of the vacuum heat insulating material.

  Thereby, it is supposed that the heat insulation performance excellent over the long term can be exhibited by suppressing the gas penetration | invasion to the inside from the end surface of the outer periphery of the jacket material 111. FIG.

  Further, as a heat welding technique, a vacuum heat insulating material provided with a thin part in which a part of a heat welding layer in a sealing part is thin has been reported (for example, see Patent Document 2).

  FIG. 14 is a cross-sectional view of a conventional vacuum heat insulating material described in Patent Document 2. FIG. 15 is a cross-sectional view showing a state in which a thin-walled portion is formed by a heating and compression jig in the conventional vacuum heat insulating material described in Patent Document 2.

  As shown in FIG. 14, in the vacuum heat insulating material 101, a part of the heat welding layer 103 in the sealing portion of the outer covering material 104 having the gas barrier layer 102 and the heat welding layer 103 is thin. The thin-walled portion 105 is formed by using a sealing jig 106 as shown in FIG. 15 and applying a particularly strong pressure to a part of the outer covering material 104 in the sealing portion. It is formed so as to surround the circumference.

  In the conventional configuration, the thin wall portion 105 increases the permeation resistance of the gas entering from the end surface of the outer periphery of the outer covering material 104, and can suppress the gas intrusion into the inside, thereby exhibiting excellent heat insulation performance for a long time. ing.

JP-A-7-269781 Japanese Utility Model Publication No. 62-141190

  However, in the configuration of Patent Document 1, the vacuum heat insulating material is manufactured by placing the filling material 112 on the covering material 111 and bending the covering material 111 so as to wrap the filling material 112. A through hole 113 as shown in FIG. 13 is generated in the bent portion. From this through hole 113, there was a problem that the penetration of atmospheric gas components into the vacuum heat insulating material was promoted over time. Further, this problem is not limited to the vacuum heat insulating material, and there is a similar problem in other sealed bags.

  Further, in the configuration of Patent Document 2, although the detailed shape of the jacket material 104 in the thin wall portion 105 is not described, the thin wall portion 105 has corners on both sides of the jacket material 104 as shown in FIG. In the case where the portion 107 is provided, cracks are generated in the outer covering material 104, particularly the gas barrier layer 102, at the corner portion 107 when the vacuum heat insulating material 101 is manufactured and handled. From this crack, there was a problem that the penetration of atmospheric gas components into the vacuum heat insulating material 101 was promoted over time. In addition, this problem is not limited to the vacuum heat insulating material 101, and there is a similar problem in other sealed bags.

  Here, the corner portion 107 refers to the thermal weld layer 103 generated at and near the boundary of the thin portion 105 when the cross section when the sealing portion is cut by a plane perpendicular to the periphery of the outer covering material 104 is seen. This refers to a square-shaped part (a part having a large curvature) formed with a change in thickness.

  Therefore, in view of the above-described conventional problems, the present invention is extremely suppressed in the occurrence of through-holes, cracks, and sealing part breakage in the thin part of the heat-welded layer provided in the sealing part and in the vicinity thereof. An object is to provide a highly airtight bag.

  In order to achieve the above object, the bag of the present invention comprises a jacket material that can be thermally welded, bend one of the jacket materials in half, and heat weld at least one of the sides connected to the bent portion. In the bag body in which the remaining side is an opening into which the filler is placed, the heat-welded part is the side where at least a part of the side where the outer peripheral parts of the jacket material are heat-welded is heat-welded When the cross section taken along a plane perpendicular to the surface is viewed, one of the thermal welding layers of the jacket material located on the thermally welded side has at least two concave portions, The deepest portion of the heat-welded layer includes a thin portion thinner than the average thickness of the heat-welded layer and a thick portion positioned at both ends of the thin-walled portion and thicker than the average thickness of the heat-welded layer. -At least the bent part of the remaining side which becomes the opening for insertion of the filler is provided To Do wants sides, the sheet - it was provided Le groove.

  In the above configuration, by providing a thin portion where the thickness of the heat-welded layer on the heat-welded side is locally thin, the heat-welded layers in the bent portion of the jacket material can be said to be complete. Since it can be heat-welded closely without gaps, through-hole generation is suppressed, and the penetration of atmospheric gas components into the interior over time is suppressed, and a highly sealed bag body can be provided over a long period of time. Can be used as a vacuum heat insulating material, it is possible to provide a highly airtight bag body that maintains excellent vacuum performance over a long period of time.

  In addition, when this bag is used as a vacuum heat insulating material, the permeation area of gas and moisture entering from the end face of the outer periphery of the jacket material is reduced in the thin part of the heat-welded layer, and the permeation resistance of gas and moisture is increased. And since the permeation | transmission rate of gas and a water | moisture content is reduced, the gas and water | moisture content which permeate | transmit with time can be suppressed, and the highly sealed bag body which maintains the vacuum performance excellent over a long term can be provided.

  In addition, since any one of the heat-welded layers of the jacket material located on the thermally welded side has at least two concave portions, a layer laminated on the outer layer side from the heat-welded layer (usually a gas barrier layer) ) Bends along the shape of the heat-welded layer at and near the thin-walled portion of the heat-welded side, but without forming a large number of corners on both sides of the jacket material, Generation of cracks in the laminated layer (usually a gas barrier layer) is extremely suppressed.

  Furthermore, in the thin-walled portion of the heat-welded layer, the thickness of the heat-welded layer is thinner than the peripheral portion, and the strength decreases by the thickness reduction, but the concave portion of the heat-welded layer is formed only on one side As the thickness of the heat-welded layer gradually increases and decreases along the concave portion, the strength of the sealed portion of the heat-welded side also increases and decreases continuously and smoothly. It is difficult for stress to concentrate locally, and cracks in the thin portion of the heat-welded layer provided on the heat-sealed side sealing portion and the surrounding jacket material and the heat-sealed side sealing portion Breakage is extremely suppressed.

  As described above, in the thin portion of the heat-welded layer provided in the heat-sealed side sealing portion and in the vicinity thereof, generation of through-holes, cracks, and heat-sealed side sealing portion breakage are extremely suppressed, and the long-term A highly sealed bag body can be provided across the board, and when this bag body is used as a vacuum heat insulating material, excellent vacuum performance can be maintained over a long period of time.

  According to the present invention, by providing the thin part where the thickness of the heat-welded layer on the heat-welded side is locally thin, the heat-welded layers in the bent portion of the outer cover material may be said to be complete. As a result, it is possible to provide a highly sealed bag body that has excellent long-term airtightness because it suppresses the generation of through-holes and suppresses the entry of atmospheric gas components into the interior over time. When this bag body is used as a vacuum heat insulating material, it is possible to provide a highly airtight bag body that maintains excellent vacuum performance over a long period of time.

  In addition, when creating only the bag before filling, it is more difficult to bend the outer cover material at the bent portion of the outer cover material by adding heat after the filling is added. Although it becomes easy to generate | occur | produce, it can adhere | attach easily by providing the thin part in which the thickness of the heat welding layer is locally thin.

  In addition, when this bag is used as a vacuum heat insulating material, the permeation area of gas and moisture entering from the end face of the outer periphery of the jacket material is reduced in the thin part of the heat-welded layer, and the permeation resistance of gas and moisture is increased. And since the permeation | transmission rate of gas and a water | moisture content is reduced, the gas and water | moisture content which permeate | transmit with time can be suppressed, and the highly sealed bag body which maintains the vacuum performance excellent over a long term can be provided.

  In addition, since any one of the heat-welded layers of the jacket material located on the thermally welded side has at least two concave portions, a layer laminated on the outer layer side from the heat-welded layer (usually a gas barrier layer) ) Bends along the shape of the heat-welded layer at and near the thin-walled portion of the heat-welded side, but without forming a large number of corners on both sides of the jacket material, Generation of cracks in the laminated layer (usually a gas barrier layer) is extremely suppressed.

  Furthermore, in the thin-walled portion of the heat-welded layer, the thickness of the heat-welded layer is thinner than the peripheral portion, and the strength decreases by the thickness reduction, but the concave portion of the heat-welded layer is formed only on one side As the thickness of the heat-welded layer gradually increases and decreases along the concave portion, the strength of the sealed portion of the heat-welded side also increases and decreases continuously and smoothly. It is difficult for stress to concentrate locally, and cracks in the thin portion of the heat-welded layer provided on the heat-sealed side sealing portion and the surrounding jacket material and the heat-sealed side sealing portion Breakage is extremely suppressed.

  As described above, in the thin portion of the heat-welded layer provided in the heat-sealed side sealing portion and in the vicinity thereof, generation of through-holes, cracks, and heat-sealed side sealing portion breakage are extremely suppressed, and the long-term A highly sealed bag body can be provided across the board, and when this bag body is used as a vacuum heat insulating material, excellent vacuum performance can be maintained over a long period of time.

Sectional drawing of the vacuum heat insulating material using the bag body in Embodiment 1 of this invention Plan view of a vacuum heat insulating material using the bag body of the same embodiment The perspective view which shows the manufacturing process of the vacuum heat insulating material using the bag body of the embodiment Sectional drawing which shows the sealing part containing the thin part in the bag body of the embodiment, and a heating compression jig Sectional drawing of the vacuum heat insulating material using the bag body in Embodiment 2 of this invention Plan view of a vacuum heat insulating material using the bag body of the same embodiment Sectional drawing which shows the sealing part and heating compression jig | tool of the edge | side used as the filling insertion opening in the bag body of the embodiment The top view of the vacuum heat insulating material using the bag body in Embodiment 3 of this invention Sectional drawing which shows the sealing part and heating compression jig | tool of the edge | side used as the filling insertion opening in the bag body of the embodiment The top view of the vacuum heat insulating material using the bag body in Embodiment 4 of this invention Sectional drawing which shows the sealing part and heating compression jig | tool of the edge | side used as the filling insertion opening in the bag body of the embodiment The perspective view which shows the manufacturing process of the conventional vacuum heat insulating material described in patent document 1 The expanded sectional view of the part which bent the jacket material of the conventional vacuum heat insulating material described in patent documents 1 Sectional drawing of the conventional vacuum heat insulating material described in patent document 2 Sectional drawing which shows the state which has formed the thin part with the heating compression jig in the conventional vacuum heat insulating material described in patent document 2

  1st invention consists of the jacket material which can be heat-welded, there exists the edge | side by which at least 1 side of the edge | side connected to a bending part was heat-welded by bending the said jacket material in half, and the remaining edge | side In the bag body serving as an opening for filling, the thermally welded portion is cut along a plane perpendicular to the thermally welded side at least a part of the sides where the outer peripheral portions of the jacket material are thermally welded to each other. When looking at the cross section, the thermal welding layer of any one of the jacket materials located on the thermally welded side has at least two concave portions, and the thermal welding layer at the deepest portion of the concave portion is Inserting a filler by providing a thin groove portion thinner than the average thickness of the heat-welded layer and a seal groove portion located at both ends of the thin-wall portion and having a thick-wall portion thicker than the average thickness of the heat-welded layer The seal groove on the side connected to at least the bent side of the remaining side to be an opening for A bag body, characterized in that provided.

  As a result, by providing a thin portion where the thickness of the heat-welded layer on the heat-welded side is locally thin, the gap between the heat-welded layers in the bent portion of the jacket material can be said to be complete. Therefore, through-hole generation is suppressed, and intrusion of atmospheric gas components into the bag body is suppressed over time, and a bag body with high sealing performance can be provided over a long period of time.

  In addition, when creating only the bag before filling, it is more difficult to bend the outer cover material at the bent portion of the outer cover material by adding heat after the filling is added. Although it becomes easy to generate | occur | produce, it can adhere | attach easily by providing the thin part in which the thickness of the heat welding layer is locally thin.

  In addition, when this bag is used as a vacuum heat insulating material, the permeation area of gas and moisture entering from the end face of the outer periphery of the jacket material is reduced in the thin part of the heat-welded layer, and the permeation resistance of gas and moisture is increased. And since the permeation | transmission rate of gas and a water | moisture content is reduced, the gas and water | moisture content which permeate | transmit with time can be suppressed, and the highly sealed bag body which maintains the vacuum performance excellent over a long term can be provided.

  In addition, since any one of the heat-welded layers of the jacket material located on the thermally welded side has at least two concave portions, a layer laminated on the outer layer side from the heat-welded layer (usually a gas barrier layer) ) Bends along the shape of the heat-welded layer at and near the thin-walled portion of the heat-welded side, but without forming a large number of corners on both sides of the jacket material, Generation of cracks in the laminated layer (usually a gas barrier layer) is extremely suppressed.

  Furthermore, in the thin-walled portion of the heat-welded layer, the thickness of the heat-welded layer is thinner than the peripheral portion, and the strength decreases by the thickness reduction, but the concave portion of the heat-welded layer is formed only on one side As the thickness of the heat-welded layer gradually increases and decreases along the concave portion, the strength of the sealed portion of the heat-welded side also increases and decreases continuously and smoothly. It is difficult for stress to concentrate locally, and cracks in the thin portion of the heat-welded layer provided on the heat-sealed side sealing portion and the surrounding jacket material and the heat-sealed side sealing portion Breakage is extremely suppressed.

  As described above, in the thin portion of the heat-welded layer provided in the heat-sealed side sealing portion and in the vicinity thereof, generation of through-holes, cracks, and heat-sealed side sealing portion breakage are extremely suppressed, and the long-term A highly sealed bag body can be provided across the board, and when this bag body is used as a vacuum heat insulating material, excellent vacuum performance can be maintained over a long period of time.

  In addition, in the post-processing of bending the heat-welded side located on the outer peripheral portion of the jacket material after the bag body is created, the folding process is facilitated by the thin wall portion provided in the seal groove portion.

  In addition, when this bag body is used as a vacuum heat insulating material, the amount of gas entering through the heat-welded layer on the side heat-welded from the end surface of the jacket material is suppressed, so that heat welding by forming a thin wall portion is performed. Since the vacuum performance does not deteriorate even if the width of the heat-welded side formed on the outer periphery of the jacket material is shortened to the extent that it can be offset with the increase in the permeation resistance of the side, the filler having the same size is included. The size of the jacket material used for the bag can be reduced, and the material cost can be reduced.

  Next, the constituent material of the bag will be described.

  The heat welding layer constituting the jacket material is not particularly specified, but a low density polyethylene film, a linear low density polyethylene film, a high density polyethylene film, a medium density polyethylene film, a polypropylene film, a polyacrylonitrile film, etc. These thermoplastic resins or mixed films thereof can be used.

  The filler is not particularly specified as to the type, but is a porous body having a gas phase ratio of about 90%, open-celled bodies such as urethane foam, styrene foam, phenol foam, glass wool, rock wool, alumina fiber, Conventionally known fillers such as fiber bodies such as silica alumina fibers, powders such as perlite, wet silica, and dry silica can be used.

  The type of adsorbent is not particularly specified, but it adsorbs residual gas components in the packing material and jacket material, and moisture and gas that enter the bag. Gases such as calcium oxide, zeolite, and silica gel are used. Any getter substance such as an adsorbent or a moisture adsorbent can be used as long as it has an action of lowering or maintaining the vacuum degree of the bag.

  The laminate adhesive used for the jacket material is not particularly specified, and conventionally known laminate adhesives such as two-component curable urethane adhesives or epoxy resin adhesives can be used.

  In addition, the concave portion is a side where the outer peripheral portions of the jacket material are thermally welded when a cross section when cutting at least a part of the side which is thermally welded with a plane perpendicular to the thermally welded side is seen. This refers to the portion where at least two heat-welded layers of the outer jacket material are indented, and the boundary line (boundary surface) between the heat-welded layer and other layers adjacent to the outside of the heat-welded layer is heat-welded The point which becomes at least 2 convex to the layer side is pointed out.

  In addition, the deepest part of a recessed part is a point part located in the location where the thickness of the heat welding layer located between the points on the opposing boundary surface among the concave point groups which form the recessed part is the thinnest Point to.

  The second invention is a bag body characterized in that, in the first invention, a seal groove portion is provided on a side not connected to the bent portion which becomes an opening for insertion.

  Thereby, since the seal groove part which consists of a thin part and a thick part is formed in all the heat welded sides, a bag body with high airtightness can be provided for a long period of time. When the body is used as a vacuum heat insulating material, excellent vacuum performance can be maintained over a long period of time.

  According to a third aspect of the present invention, in the first aspect of the invention, there is provided a bag body characterized in that no seal groove portion is provided on a side that does not connect to the bent portion serving as an opening for insertion.

  As a result, the heat-welded surface on the side that does not connect to the bent portion that becomes the opening for insertion has a uniform thickness without a thin-walled portion or thick-walled portion. Further, breakage of the sealed portion at the side is further suppressed.

  In addition, the heat welding surface on the side that does not connect to the bent part that becomes the opening for insertion does not have a thin or thick part, and the thickness is uniform. Can be re-welded.

  Furthermore, the heat-welded surface on the side that does not lead to the bent portion that becomes the opening for insertion has a uniform thickness because there is no thin-walled or thick-walled portion. It is also possible to add a saw-like post-processing to the surface to improve the appearance.

  In a fourth aspect of the invention, in particular, in the first to third aspects of the invention, in the thick part thicker than the thin part sandwiched between the thin part and the thin part, the width of the thin part is set to the thick part. The bag body is characterized by being smaller than the width of the portion.

  Thereby, by making the width of the thin portion smaller than the width of the thick portion, the width of the thick portion is large, and the volume of the resin moving part when the thin portion is pressed is increased, and the thin portions are The load received by the jacket material positioned between them is relieved, and the jacket material is hardly broken.

  In addition, since the thickness of the outer cover material of the thin portion can be reduced to a limit, the sealing performance per thin portion is increased, and the number of thin portions per unit width can be reduced. Furthermore, unevenness is reduced and dust and foreign matter are less likely to accumulate.

  In a fifth aspect of the invention, in particular, in the first to third aspects of the invention, in the thick portion thicker than the thin portion sandwiched between the thin portion and the thin portion, the width of the thin portion and the thick portion The bag is characterized in that the width of the bag is equal or substantially equal.

  As a result, since the width of the thin portion and the width of the thick portion are made equal or substantially equal, a large number of recesses are provided per unit width. Since the heat welding is performed in the recesses, gas intrusion can be minimized. In particular, when glass fiber is used as the filler, the core material sandwiched during the thermal welding as an interstitial material is often heat-deformed and forms a through-hole in the thin portion. The effect becomes more prominent.

  In a sixth aspect of the invention, in particular, in the first to third aspects of the invention, in the thick portion thicker than the thin portion sandwiched between the thin portion and the thin portion, the width of the thin portion is set to the thick portion. It is a bag characterized by being larger than the width of the part.

  Thereby, when this bag is used as a vacuum heat insulating material, the width of the thin wall portion is made larger than the width of the thick wall portion, so that the thin wall portion of the heat-welded layer enters from the end face of the outer periphery of the jacket material. Since the gas and moisture permeation area is reduced, the gas and moisture permeation resistance is increased, and the gas and moisture permeation rate is reduced. It is possible to provide a highly airtight bag body that maintains excellent vacuum performance.

  In addition, by making the width of the thin part larger than the width of the thick part, when the jacket materials are heat welded together, the air existing between the jacket materials can easily escape, Generation of voids is suppressed.

  According to a seventh invention, in particular, in the first to sixth inventions, the thickness of the thickest portion on the outermost side is greater than the thickness of the heat-welded layer located between the outer periphery and the thickest portion on the outermost side. It is a bag characterized by being thickened.

  As a result, the thickness of the outermost thick part is made thicker than the thickness of the heat-welded layer located between the outer periphery and the outermost thick part. The adhesive strength between the materials is large, and the sealing performance is further improved against stress generated during application to the outer periphery after the bag body is formed or during processing.

  In the eighth invention, in particular, in the first to seventh inventions, the thickness of the thickest portion on the innermost side is thicker than the thickness of the heat welding layer located on the inner side of the thickest portion on the innermost side. It is the bag characterized by having performed.

  As a result, the innermost thick part is made thicker than the innermost thick part, so that the innermost thick part is covered with the outermost thick part. Because the adhesive strength between each other is large and the sealing performance is further improved, the heat-welded layer peels off at the places other than the thickest part on the innermost side against the stress applied to the outer periphery after processing the bag body and during processing. Even if it occurs, gas intrusion can be minimized.

  A ninth invention is a bag body characterized in that, in the first to eighth inventions, the filler is made of glass fiber.

  Thereby, when this bag body is used for a vacuum heat insulating material, since a filling material consists of glass fiber, the thermal conductivity per unit thickness can be made small and a bag body with high heat insulation performance can be provided.

  10th invention consists of a jacket material which can be heat-welded, there is a side where one sheet of the jacket material is folded in half, and at least one side of the side connected to the bent portion is thermally welded, and the remaining sides In the bag body serving as an opening for filling, the thermally welded portion is cut along a plane perpendicular to the thermally welded side at least a part of the sides where the outer peripheral portions of the jacket material are thermally welded to each other. When looking at the cross section, the thermal welding layer of any one of the jacket materials located on the thermally welded side has at least two concave portions, and the thermal welding layer at the deepest portion of the concave portion is A seal groove portion comprising a thin portion thinner than the average thickness of the heat-welded layer and a thick portion positioned at both ends of the thin-wall portion and thicker than the average thickness of the heat-welded layer is provided. After insertion, on the side that is connected to the bent part of the remaining side that becomes the opening for insertion The sheet - is a manufacturing method of the bag body, characterized in that a Le groove.

  Thereby, after putting a filler, the bag body which made the side connected to the bending part at least the remaining side used as the opening for insertion into the seal groove part can be provided.

  In addition, by providing a thin part where the thickness of the heat-welded layer on the thermally welded side is locally thin, the heat-welded layers in the bent part of the outer cover material can be said to be completely free of gaps. Since it can be adhered and thermally welded, through-hole generation is suppressed, and when this bag is used as a vacuum heat insulating material, penetration of atmospheric gas components into the vacuum heat insulating material over time is suppressed, which is excellent for a long time A highly airtight bag body that maintains vacuum performance can be provided.

  In particular, when making only the bag before filling, it is more difficult to bend the outer cover material at the bent portion of the outer cover material by adding heat after filling. Although it becomes easy to generate | occur | produce, it can adhere | attach easily by providing the thin part in which the thickness of the heat welding layer is locally thin.

  In addition, when this bag is used as a vacuum heat insulating material, the permeation area of gas and moisture entering from the end face of the outer periphery of the jacket material is reduced in the thin part of the heat-welded layer, and the permeation resistance of gas and moisture is increased. And since the permeation | transmission rate of gas and a water | moisture content is reduced, the gas and water | moisture content which permeate | transmit with time can be suppressed, and the highly sealed bag body which maintains the vacuum performance excellent over a long term can be provided.

  In addition, since any one of the heat-welded layers of the jacket material located on the thermally welded side has at least two concave portions, a layer laminated on the outer layer side from the heat-welded layer (usually a gas barrier layer) ) Bends along the shape of the heat-welded layer at and near the thin-walled portion of the heat-welded side, but without forming a large number of corners on both sides of the jacket material, Generation of cracks in the laminated layer (usually a gas barrier layer) is extremely suppressed.

  Furthermore, in the thin-walled portion of the heat-welded layer, the thickness of the heat-welded layer is thinner than the peripheral portion, and the strength decreases by the thickness reduction, but the concave portion of the heat-welded layer is formed only on one side As the thickness of the heat-welded layer gradually increases and decreases along the concave portion, the strength of the sealed portion of the heat-welded side also increases and decreases continuously and smoothly. It is difficult for stress to concentrate locally, and cracks in the thin portion of the heat-welded layer provided on the heat-sealed side sealing portion and the surrounding jacket material and the heat-sealed side sealing portion Breakage is extremely suppressed.

  As described above, in the thin portion of the heat-welded layer provided in the heat-sealed side sealing portion and in the vicinity thereof, generation of through-holes, cracks, and heat-sealed side sealing portion breakage are extremely suppressed, and the long-term A highly sealed bag body can be provided across the board, and when this bag body is used as a vacuum heat insulating material, excellent vacuum performance can be maintained over a long period of time.

  In addition, in the post-processing of bending the heat-welded side located on the outer peripheral portion of the jacket material after the bag body is created, the folding process is facilitated by the thin wall portion provided in the seal groove portion.

  In addition, when this bag body is used as a vacuum heat insulating material, the amount of gas entering through the heat-welded layer on the side heat-welded from the end surface of the jacket material is suppressed, so that heat welding by forming a thin wall portion is performed. Since the vacuum performance does not deteriorate even if the width of the heat-welded side formed on the outer periphery of the jacket material is shortened to the extent that it can be offset with the increase in the permeation resistance of the side, the filler having the same size is included. The size of the jacket material used for the bag can be reduced, and the material cost can be reduced.

  An eleventh aspect of the invention is a bag manufacturing method, characterized in that, in the tenth aspect of the invention, a seal groove is provided on a side that is not connected to a bent part that becomes an opening for insertion.

  Thereby, the bag body which used as the seal | sticker groove part which consists of a thin part and a thick part can provide all the sides heat-welded.

  Moreover, since all the heat-welded sides are sealed groove portions composed of a thin wall portion and a thick wall portion, a bag body having a high hermeticity can be provided for a long period of time. When used as a material, excellent vacuum performance can be maintained over a long period of time.

  According to a twelfth aspect of the invention, in particular, in the tenth aspect of the invention, the seal groove portion is not provided on the side not connected to the bent portion that becomes the opening for insertion.

  Thereby, after putting a filler, the bag body which does not make the side which does not connect with the bending part used as the opening for insertion into a sealing groove part can be provided.

  As a result, the heat-welded surface on the side that does not connect to the bent portion that becomes the opening for insertion has no thin or thick portion, and the thickness is uniform, so that through-holes and cracks are generated or heat-welded in the jacket material. Further, the breakage of the sealing portion at the side is further suppressed.

  In addition, since the heat welding surface on the side that does not connect to the bent part that becomes the opening for insertion has no thin or thick part and the thickness is uniform, contaminants can be welded with high precision like liquid or gas. Re-welding is possible when required.

  In addition, the heat-welded surface on the side that does not connect to the bent portion that becomes the opening for insertion has a uniform thickness because there is no thin-walled portion or thick-walled portion. It is also possible to add a saw-like post-processing to improve the appearance.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, taking a vacuum heat insulating material as an example. The same reference numerals are given to the same components as those of the above-described embodiment, and the detailed description thereof will be omitted. The present invention is not limited to the embodiments. The use of the bag is not limited to the vacuum heat insulating material.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a vacuum heat insulating material using a bag body according to Embodiment 1 of the present invention, and FIG. 2 is a plan view of the vacuum heat insulating material using the bag body of the same embodiment. 3 is a perspective view showing a manufacturing process of a vacuum heat insulating material using the bag body of the embodiment, and FIG. 4 is a sealing portion including a thin portion and a heating compression jig in the bag body of the embodiment. FIG.

  As shown in FIGS. 1 to 4, the vacuum heat insulating material 1 according to the present embodiment includes a core material 2, an adsorbent 3 disposed in the core material 2, and a rectangular outer cover material 4 bent in half. The core material 2 and the adsorbent 3 are sealed under reduced pressure between the jacket materials 4, and the outer peripheral portions near the periphery of the jacket material 4 covering the core material 2 are heat-welded.

  The outer covering material 4 is formed by laminating a surface protective layer 5, a gas barrier layer 6, and a heat welding layer 7 from the outer layer side. In addition, the side 31 on the periphery side (outer peripheral part) of the outer cover material 4 has a sealing portion 8 in which the heat-welding layers of the outer cover material are melted and bonded together. Of the three sides, all three sides have a seal groove portion 33 composed of the thin portion 9 and the thick portion 32.

  Here, the shape of the seal groove part 33 which consists of the thin part 9 and the thick part 32 is demonstrated.

  As shown in FIG. 4, the seal groove portion 33 is in the sealing portion 8 and includes a thin portion 9 and thick portions 32, 35, and 36. The thin-walled portion 9 is positioned at the deepest portion of the recess, and the heat-welded layer 7 of the thin-walled portion 9 is the thickness (average heat-welded) of the heat-welded layer 7 heat-sealed in a range other than the seal groove portion 33 of the sealing portion 8. It is thinner than the thickness of the layer 7. The thick portions 32, 35, and 36 are located at both ends of the thin portion 9, and the thickness of the heat weld layer 7 in which the heat weld layer 7 of the thick portion 32 is thermally welded in a range other than the seal groove portion 33 of the sealing portion 8. It is thicker than the average (the thickness of the average heat welding layer 7).

  Further, the thickness of the thickest portion 35 on the outermost side is thicker than the thickness of the heat-welded layer 7 located between the outer periphery 37 and the thickest portion 35 on the outermost side.

  Further, the thickness of the thickest portion 36 on the innermost side is thicker than the thickness of the heat welding layer 7 located on the inner side of the thickest portion 36 on the innermost side.

  Moreover, as for a recessed part, any one heat-welding layer 7 of the jacket material 4 has two recessed parts. Further, the width 9W of the thin portion 9 is smaller than the width 32W of the thick portion 32.

  The core material 2 of the filling is a core material 2 made of an aggregate of glass fibers.

  The outer covering material 4 includes a linear low density polyethylene film having a thickness of 50 μm as the heat welding layer 7, an aluminum foil having a thickness of 6 μm as the gas barrier layer 6, and two nylon films having a thickness of 15 μm and 25 μm as the surface protective layer 5. Laminated. The adsorbent 3 is made of calcium oxide. An aluminum vapor deposition film may be applied to the gas barrier layer, or a combination of an aluminum vapor deposition film and an aluminum foil may be applied.

  Next, an example of the manufacturing method of the vacuum heat insulating material 1 of this Embodiment 1 is demonstrated based on FIGS.

  First, in FIG. 3, the jacket material 4 is folded in half so that the thermal welding layers 7 of the jacket material 4 having the thermal welding layer 7 on one side and capable of being thermally welded face each other. 31 is heat-welded to form a heat-welded side 31, and a bag having sides 34B and 34C serving as openings for insertion is created.

  At the time of this thermal welding, the metal upper heating and compression jig 22 having the convex portion 10, the silicon rubber 21, and the lower heating and compression jig 23 are heated and compressed so as to sandwich the outer cover material 4, and the thin portion having the shape shown in FIG. 9 and the sealing portion 8 including the sealing groove portion 33 including the thick portion 32 are formed.

  In FIG. 4, the width of the convex portion 10 of the upper heating compression jig 22 is smaller than the width of the concave portion sandwiched between the convex portions 10 of the upper heating compression jig 22.

  Here, although not shown, the corner of the convex portion 10 has an R shape.

  At this time, the preferable conditions (values) of the temperature T1 of the upper heating and compression jig 22, the temperature T2 of the lower heating and compression jig 23, the thermal welding time S, and the thermal welding pressure P are as follows. The temperature T2 of the lower heating compression jig 23 is 70 to 110 ° C., the thermal welding time S is 1.5 to 4.5 seconds, and the thermal welding pressure P is 0.2 to 0.6 MPa. However, it varies depending on the material of the jacket material 4 and a preferable value may be selected, and is not particularly limited.

  Here, the seal width (the width for thermally welding the jacket materials 4) is 20 mm, and the width 9W of the thin portion 9 is formed smaller than the width 32W of the thick portion 32. However, the seal width (the width at which the outer cover materials 4 are thermally welded) varies depending on the sealing property, and a preferable value may be selected and is not particularly limited.

  Further, if the width 9W of the thin portion 9 is too small, cracks occur in the aluminum foil, and if the width 9W of the thin portion 9 is too large, a facility with a large thermal welding pressure P is required. 9W is preferably 0.3 to 2 mm, and the width 32W of the thick portion 32 is preferably 0.8 to 15 mm. However, the width 9W of the thin portion 9 and the width 32W of the thick portion 32 vary depending on the number of the thin portions 9, and a preferable value may be selected and is not particularly limited.

  Thereafter, the core material 2 made of glass fiber and having the adsorbent 3 previously placed therein is inserted into the bag through the sides 34B and 34C serving as openings for inserting the bag of the jacket material 4, and the bag interior is about 200 Pa. The vacuum heat insulating material 1 is obtained by heat-sealing and sealing the sides 34B and 34C serving as openings for inserting the bag of the jacket material 4 while reducing the pressure.

  Here, when the core member 2 is inserted into the bag, the core member 2 is inserted to the folded position of the bag so as to be in the back of the bag as shown by the arrow in FIG. At the time of thermal welding of the sides 34B and 34C serving as the opening for insertion, the metallic upper heating compression jig 22 and the silicon rubber 21 are used in the same manner as the thermal welding method in which the side 31 that has been previously heat-sealed is thermally welded to form a bag. And the lower heating compression jig 23 to heat and compress the outer cover material 4 so as to form the sealing portion 8 including the seal groove portion 33 including the thin portion 9 and the thick portion 32 having the shape shown in FIG.

  That is, there are three sides that are heat-welded, and the sealing portion 8 including the sealing groove portion 33 including the thin portion 9 and the thick portion 32 is formed on all three sides.

  Here, as shown in FIG. 2, fin-like projections are not formed on one side of the outer periphery of the vacuum heat insulating material 1.

  Here, although the convex part 10 exists in the upper side heating compression jig 22, the convex part does not exist in the silicone rubber 21 and the lower side heating compression jig 23, and it is a plane or substantially plane. However, after the sealing groove portion 33 of the sealing portion 8 is formed, since the thin portion 9 is formed, the outer covering material 4 closer to the silicon rubber 21 has a shape having a wave.

  Regarding the thermal welding at the time of forming the seal groove portion 33, the thick portion 32, the outermost thick portion 35, and the innermost thick portion 36 are ranges other than the seal groove portion 33 of the sealing portion 8. Compared with the case where heat welding is performed, the presser is gathered during heating and compression.

  Here, the side 34B serving as the insertion opening is, in other words, the side 34B not connected to the bent portion serving as the insertion opening.

  Further, the side 34C serving as the insertion opening is, in other words, the side 34C connected to at least the bent portion of the remaining side serving as the insertion opening.

  In addition, since the sides 34B and 34C serving as the insertion openings are ultimately thermally welded, in other words, they are also thermally welded sides.

  In addition, the side 31 of the jacket material 4 was heat-welded, and the bag 31 with the sides 34 </ b> B and 34 </ b> C serving as insertion openings was created as the heat-welded side 31. The side 34C connected to the portion may be heat-welded to create a bag having the side 34B that is an opening for insertion.

  As described above, the vacuum heat insulating material 1 according to the present embodiment includes the outer cover material 4 having the heat welding layer 7 on one side and is capable of being heat welded. In the bag in which at least one side of the side connected to the part is heat-welded and the remaining side is an opening for filling, the heat-welded part is the side where the outer peripheral parts of the jacket material 4 are heat-welded When one sees a cross section when cutting at least a part of 31 along a plane perpendicular to the heat-welded side 31, one of the heat-welded layers 7 of the jacket material 4 located on the heat-welded side 31 is It has at least two recesses, and is formed on the heat weld layer 7 at the deepest part of the recesses with a thin portion 9 thinner than the average heat weld layer 7 and at both ends of the thin portion 9, and an average heat weld. After providing the seal groove portion 33 composed of the thick portion 32 thicker than the thickness of the layer 7 and putting the core material 2 as the filler At least the bent portion leading edge 34C and does not lead to the opening become bent portion for insertion side 34B of the remaining sides the opening for insertion, shea - provided Le groove 33 (formed).

  Thereby, by providing the thin-walled portion 9 where the thickness of the heat-welded layer is locally thin on the heat-welded sides 31, 34B, 34C, the heat-welded layers 7 in the bent portion of the jacket material 4 are Since it can be heat-welded without any gaps, it can be said that it is complete, so the generation of through-holes is suppressed, and the penetration of atmospheric gas components into the vacuum heat insulating material 1 over time is suppressed. It is possible to provide a vacuum heat insulating material 1 with high hermeticity that maintains the above.

  In other words, the outer cover material 4 has the heat-welding layer 7 on one side and can be heat-welded. The outer cover material 4 is folded in half, and at least one side connected to the bent portion is heat-welded. In the bag having the side 31 and the remaining side serving as an opening for filling, the heat-welded portion is at least part of the side 31 where the outer peripheral portions of the jacket material 4 are heat-welded to the heat-welded side 31. When the cross section when cut by a vertical plane is viewed, one of the thermal welding layers 7 of the outer cover material 4 located on the side 31 which is thermally welded has at least two concave portions, and the deepest of the concave portions. The heat-welding layer 7 is composed of a thin-walled portion 9 thinner than the average heat-welded layer 7 and a thick-walled portion 32 positioned at both ends of the thin-walled portion 9 and thicker than the average heat-welded layer 7. After providing the seal groove portion 33 and inserting the core material 2 as a filling material, The side 34B which does not lead to the opening become bent portion for insertion between the side 34C leading to bent portion even without, shea - provided Le groove 33 (formed) was carried out manufacturing method of vacuum insulation material 1.

  As a result, by providing the thin portions 9 where the thickness of the heat-welded layer 7 is locally thin on the heat-welded sides 31, 34B, 34, the heat-welded layers 7 in the bent portion of the jacket material 4 can be joined together. Since it can be heat-welded without any gaps to the extent that it can be said to be complete, the generation of through holes is suppressed, and the penetration of atmospheric gas components into the vacuum heat insulating material 1 over time is suppressed, and an excellent vacuum over a long period of time. A highly heat-insulating vacuum heat insulating material 1 that maintains performance can be provided.

  Further, in the case where only the bag before the core material 2 as the filling material is made, the case where the heat sealing is performed after the core material 2 as the filling material is put in the folded portion of the outer shell material 4 is more preferable. Although it becomes difficult to bend | fold the material 4 and it becomes easy to generate | occur | produce a through hole more, it can contact | adhere easily by providing the thin part 9 in which the thickness of the heat welding layer 7 is locally thin.

  Further, in the thin-walled portion 9 of the heat-welded layer 7, the gas and moisture permeation area entering from the end surface of the outer periphery of the outer cover material 4 is reduced, the gas and moisture permeation resistance is increased, and the gas and moisture permeation rate is reduced. Therefore, the highly heat-tight vacuum heat insulating material 1 that suppresses the gas and the amount of moisture that permeate with time and maintains excellent vacuum performance over a long period of time can be provided.

  In addition, at least one of the jacket materials 4 located on the sides 31, 34 </ b> B, and 34 </ b> C that has been heat-welded has at least two recesses in the heat-welding layer 7. The layer (usually a gas barrier layer) laminated to bends along the shape of the heat-welded layer 7 at and near the thin-walled portion 9 of the heat-welded sides 31, 34B, 34C. Generation of cracks in the layer (usually a gas barrier layer) laminated on the outer layer side from the heat-welded layer 7 is extremely suppressed without forming a large number of corners on both sides.

  Furthermore, in the thin-walled portion 9 of the heat-welded layer 7, the thickness of the heat-welded layer 7 is thinner than the peripheral portion, and the strength is reduced by the thickness reduction, but the concave portion of the heat-welded layer 7 is formed only on one side. If the thickness of the heat-welded layer 7 gradually increases and decreases along the recess, the strength of the heat-welded sides 31, 34B and 34C also increases and decreases continuously and smoothly. It is difficult for stress to concentrate locally in the thin portion 9 of the weld layer 7, and cracks are generated in the thin portion 9 of the heat weld layer 7 and the jacket material 4 in the vicinity thereof, and the sides 31, 34 B, and 34 C that are heat welded. Breakage of the sealing portion 8 is extremely suppressed.

  As described above, generation of cracks and sealing of the sides 31, 34B, 34C that are cracked or thermally welded in the thin-walled portion 9 of the heat-welding layer 7 provided in the sealing portion 8 of the sides 31, 34B, 34C that are heat-welded. The fracture | rupture of the part 8 is suppressed extremely and the vacuum heat insulating material 1 with high airtightness which maintains the outstanding vacuum performance over a long term can be provided.

  In addition, after the vacuum heat insulating material 1 is created, in the post-processing for bending the heat-welded sides 31, 34B, 34C located on the outer peripheral portion of the jacket material 4, the thin wall portion 9 provided in the seal groove portion 33 is bent. Processing becomes easy.

  In addition, since the amount of gas entering through the heat-welded layer 7 of the sides 31, 34B, 34C heat-welded from the end face of the outer cover material 4 is suppressed, the heat-welded sides 31, 34B due to the formation of the thin portion. , 34C, even if the width of the heat-welded sides 31, 34B, 34C formed on the outer peripheral portion of the outer cover material 4 is shortened to the extent that it can be offset with the increase in the permeation resistance of 34C, the vacuum performance is not lowered. The size of the jacket material 4 used for the vacuum heat insulating material 1 having the above filler can be reduced, and the material cost can be reduced.

  Further, in the thick part 32 that is thicker than the thin part 9 sandwiched between the thin part 9 and the thin part 9, the width 9W of the thin part 9 is smaller than the width 32W of the thick part 32. The width 32W of the meat portion 32 is large, and the volume of the movement location of the resin (resin constituting the heat welding layer 7) that accompanies the pressing of the thin portion 9 is large, and the outer portion located between the adjacent thin portions 9 is provided. The load received by the workpiece 4 is alleviated, and the outer jacket material 4 is hardly broken.

  Further, since the thickness of the outer cover material 4 of the thin portion 9 can be reduced to the limit (so that the thickness of the heat-welded layer 7 is almost eliminated), the sealing performance per one portion of the thin portion 9 is increased, and the unit width The number of thin-walled portions 9 per hit can be reduced. Furthermore, unevenness is reduced and dust and foreign matter are less likely to accumulate.

  Further, since the thickness of the thickest portion 35 on the outermost side is larger than the thickness of the heat welding layer 7 located between the outer periphery and the thickest portion 35 on the outermost side, the thickest portion on the outermost side is formed. The adhesive strength between the jacket materials 4 of the portion 35 is large, and the sealing performance is further improved against stress generated during application to the outer peripheral portion after the bag body is formed or during processing.

  In addition, since the thickness of the innermost thick portion 36 is made thicker than the thickness of the heat welding layer 7 located on the inner side of the innermost thick portion 36, the innermost thick portion Since the thickness of 36 is thicker than the thickness of the heat-welding layer 7 located on the inner side of the thickest portion 36 on the innermost side, the adhesive strength between the jacket materials 4 of the thickest portion 36 on the innermost side is increased. Because the sealing performance is greatly improved, peeling of the heat-welded layer 7 occurs in places other than the thickest portion 36 closest to the innermost side against stress generated during application to the outer periphery after the bag body is formed or during processing. Even gas intrusion can be minimized.

  Moreover, when the filler (core material 2) is made of glass fiber, the thermal conductivity per unit thickness can be reduced, and the vacuum heat insulating material 1 with high heat insulating performance can be provided.

(Embodiment 2)
FIG. 5 is a cross-sectional view of the vacuum heat insulating material using the bag body according to the second embodiment of the present invention, and FIG. 6 is a plan view of the vacuum heat insulating material using the bag body of the same embodiment. 7 is a cross-sectional view showing a side sealing portion and a heating and compression jig serving as a filling insertion opening in the bag body of the same embodiment.

  A difference between the vacuum heat insulating material 40 of the second embodiment shown in FIGS. 5 to 7 and the vacuum heat insulating material 1 of the first embodiment shown in FIGS. 1 to 4 is the vacuum heat insulating material of the first embodiment. 1 has a seal groove portion 33 in which all three sides of the three sides (the heat-welded sides 31, 34B, 34C) of the heat-sealed sealing portion 8 are composed of the thin portion 9 and the thick portion 32. However, the vacuum heat insulating material 40 of the second embodiment is the side that becomes the opening for insertion among the three sides (the heat-welded sides 31, 34C, and 34D) of the heat-sealed sealing portions 8 and 48. Two sides excluding 34D have a seal groove portion 33 composed of a thin portion 9 and a thick portion 32, and a side 34D serving as an insertion opening has a seal groove portion 33 composed of a thin portion 9 and a thick portion 32. That is not.

  As shown in FIG. 7, the side 34 </ b> D serving as an insertion opening does not have the seal groove 33 composed of the thin portion 9 and the thick portion 32, and pressurizes a constant area with a constant pressure to maintain a constant temperature. The sealing portion 48 is formed by heat welding.

  Here, the shape of the seal groove portion 33 including the thin portion 9 and the thick portion 32 is the same as that of the first embodiment.

  Next, the manufacturing method of the vacuum heat insulating material 40 of this Embodiment is demonstrated centering on a different point from the manufacturing method of the vacuum heat insulating material 1 of Embodiment 1 based on FIGS.

  First, in the same manner as in the first embodiment, the outer cover material 4 is folded in half so that the heat welding layers 7 of the outer cover material 4 that can be heat-welded face each other, and the side 31 of the outer cover material 4 is heated. Welded and heat-welded side 31 is formed, and a bag having sides 34D and 34C serving as openings for insertion is created. In this thermal welding method, the sealing part 8 including the seal groove part 33 shown in FIG. 3 is formed as in the first embodiment.

  Here, the seal width (the width for thermally welding the jacket materials 4), the width 9W of the thin portion 9 and the width 32W of the thick portion 32 are also formed in the same manner as in the first embodiment.

  However, as in the first embodiment, the seal width (the width at which the outer cover materials 4 are thermally welded) varies depending on the sealing property, and a preferable value may be selected, and is not particularly limited.

  Similarly to the first embodiment, the width 9W of the thin portion 9 and the width 32W of the thick portion 32 vary depending on the number of the thin portions 9, and a preferable value may be selected and is not particularly limited.

  Thereafter, the core material 2 made of glass fiber and having the adsorbent 3 previously placed therein is inserted into the bag through the sides 34D and 34C serving as openings for inserting the bag of the jacket material 4, and the bag interior is about 200 Pa. The side 34 </ b> C serving as an opening for inserting the bag of the jacket material 4 is thermally welded while reducing the pressure below.

  In this thermal welding method, the sealing part 8 including the seal groove part 33 shown in FIG. 3 is formed as in the first embodiment.

  Next, the vacuum heat insulating material 40 is obtained by thermally welding and sealing the side 34 </ b> D serving as the opening for inserting the bag of the outer cover material 4 while reducing the pressure inside the bag to about 200 Pa or less. At the time of thermal welding of the side 34D serving as the opening for insertion, the metal upper heating compression jig 42, the silicon rubber 21, and the lower compression jig 43 are heated and compressed so as to sandwich the two outer cover materials 4, and a certain amount The area is pressurized at a constant pressure and thermally welded at a constant temperature to form a planar sealing portion 48 shown in FIG.

  At this time, the preferable values (conditions) of the temperature T1, the thermal welding time S, and the thermal welding pressure P of the upper heating and compression jig 42 are 120 to 200 ° C. and the thermal welding time S of the upper heating and compression jig 42 is 120 to 200 ° C. The heat welding pressure P is 0.2 to 0.6 MPa for 1.5 to 3 seconds. However, it varies depending on the material of the jacket material 4 and a preferable value may be selected, and is not particularly limited.

  Here, the thick portion 32, the outermost thick portion 35, and the innermost thick portion 36 are heated and compressed as compared with the case where heat sealing is performed in a range other than the seal groove portion 33 of the sealing portion 8. At this time, as in the first embodiment, the presser is gathered.

  Note that after the side 34C serving as the insertion opening was thermally welded, the side 34D serving as the insertion opening was thermally welded, but the side 34D serving as the insertion opening was first heat-sealed and the plane shown in FIG. After forming the sealing part 48 in the shape, the side part 34C serving as an opening for insertion is thermally welded while reducing the pressure inside the bag to about 200 Pa or less, and the sealing part 8 including the sealing groove part 33 shown in FIG. It may be formed.

  As described above, the vacuum heat insulating material 40 according to the present embodiment is composed of the outer cover material 4 having the heat welding layer 7 on one side and capable of being heat welded. In the bag in which at least one side of the side connected to the part is heat-welded and the remaining side is an opening for filling, the heat-welded part is the side where the outer peripheral parts of the jacket material 4 are heat-welded When one sees a cross section when cutting at least a part of 31 along a plane perpendicular to the heat-welded side 31, one of the heat-welded layers 7 of the jacket material 4 located on the heat-welded side 31 is It has at least two recesses, and is formed on the heat weld layer 7 at the deepest part of the recesses with a thin portion 9 thinner than the average heat weld layer 7 and at both ends of the thin portion 9, and an average heat weld. A seal groove portion 33 comprising a thick portion 32 thicker than the thickness of the layer 7 is provided, and the remaining side that becomes an opening for insertion is provided. The seal groove portion 33 is provided (formed) at least on the side 34C connected to the bent portion, and the seal groove portion 33 is not provided (formed) on the side 34D not connected to the bent portion serving as the insertion opening. Not)

  As a result, the heat welding surface of the side 34D that does not connect to the bent portion that becomes the opening for insertion has a uniform thickness without a thin portion or a thick portion. The breakage of the sealing portion 48 at the side that has been heat-welded is further suppressed.

  In other words, the outer cover material 4 has the heat-welding layer 7 on one side and can be heat-welded. The outer cover material 4 is folded in half, and at least one side connected to the bent portion is heat-welded. In the bag having the side 31 and the remaining side serving as an opening for filling, the heat-welded portion is at least part of the side 31 where the outer peripheral portions of the jacket material 4 are heat-welded to the heat-welded side 31. When the cross section when cut by a vertical plane is viewed, one of the thermal welding layers 7 of the outer cover material 4 located on the side 31 which is thermally welded has at least two concave portions, and the deepest of the concave portions. The heat-welding layer 7 is composed of a thin-walled portion 9 thinner than the average heat-welded layer 7 and a thick-walled portion 32 positioned at both ends of the thin-walled portion 9 and thicker than the average heat-welded layer 7. After providing the seal groove portion 33 and inserting the core material 2 as a filling material, At least the side 34C connected to the bent portion is used as the seal groove portion 33, and the manufacturing method of the vacuum heat insulating material 40 is performed in which the side 34D not connected to the bent portion serving as the insertion opening is not used as the seal groove portion 33. .

  Accordingly, it is possible to provide the vacuum heat insulating material 40 in which the side 34 </ b> D that does not lead to the bent portion that becomes the insertion opening after filling is not used as the seal groove portion 33.

  Further, since the heat welding surface of the side 34D that does not connect to the bent portion that becomes the opening for insertion does not have a thin wall portion or a thick wall portion, and has a uniform thickness, occurrence of through holes, cracks, and heat welding in the jacket material The breakage of the sealed portion 48 on the side is further suppressed extremely.

  Further, the heat welding surface of the side 34D that does not connect to the bent portion that becomes the opening for insertion has a thin thickness and a uniform thickness, so that the contaminants are highly accurate heat such as liquid or gas. If welding is required, re-welding is possible.

  Furthermore, the heat welding surface of the side 34D that does not lead to the bent portion that becomes the opening for insertion has a uniform thickness because there is no thin portion or thick portion. In order to improve the appearance of the welded surface, a saw-like post-processing can be added.

  Moreover, also in the vacuum heat insulating material 40 of this Embodiment, the effect similar to the vacuum heat insulating material 1 of Embodiment 1 can be anticipated.

  As described above, the description in which the seal groove portion 33 of the sealing portion 8 is formed in the first embodiment and the second embodiment has been performed. However, as in the following third and fourth embodiments, the seal groove portion 33 It is also possible to change the width 9W of the thin portion 9 and the width 32W of the thick portion 32.

(Embodiment 3)
FIG. 8 is a plan view of a vacuum heat insulating material using the bag body according to the third embodiment of the present invention, and FIG. 9 is a side sealing portion serving as a filling insertion opening in the bag body of the same embodiment. It is sectional drawing which shows a heating compression jig.

  8 and 9 is different from the vacuum heat insulating material 1 of the first embodiment shown in FIGS. 1 to 3 in the vacuum heat insulating material 1 of the first embodiment. The width 9W of the thin-walled portion 9 of the seal groove portion 33 composed of the thin-walled portion 9 and the thick-walled portion 32 is smaller than the width 32W of the thick-walled portion 32. In the thick part 32A thicker than the thin part 9A sandwiched between the thin part 9A and the thin part 9A of the groove part 33A, the width 9AW of the thin part 9A and the width 32AW of the thick part 32A are equal or substantially equal. It is that.

  Further, as shown in FIG. 9, the width of the convex portion 12 of the upper heating compression jig 52 and the width of the concave portion sandwiched between the convex portions 12 of the upper heating compression jig 52 are equal or substantially equal.

  Here, although not shown, the corner of the convex portion 12 has an R shape.

  Next, the manufacturing method of the vacuum heat insulating material 50 is different from the manufacturing method of the vacuum heat insulating material 1 of the first embodiment or the manufacturing method of the vacuum heat insulating material 40 of the second embodiment on the basis of FIGS. 8 and 9. The explanation is centered.

  The difference in the manufacturing method between the vacuum heat insulating material 50 of the third embodiment shown in FIGS. 8 and 9 and the vacuum heat insulating material 1 of the first embodiment is that the width 9AW and the thick wall portion of the thin portion 9A of the seal groove portion 33A are as follows. It only occurs at 32A width 32AW. That is, the vacuum heat insulating material 1 shown in FIG. 4 of Embodiment 1 is the same as the vacuum heat insulating material 1, the width 9 W of the thin portion 9 of the seal groove portion 33 including the thin portion 9 and the thick portion 32 is the width of the thick portion 32. Although it is smaller than 32W, in the vacuum heat insulating material 50 shown in FIG. 9 of Embodiment 3, in the thick part 32A thicker than the thin part 9A sandwiched between the thin part 9A and the thin part 9A, The width 9AW of the thin-walled portion 9A and the width 32AW of the thick-walled portion 32A are formed equally or substantially uniformly to form the sealing portion 58 shown in FIG.

  Here, except for the width 9AW of the thin wall portion 9A and the width 32AW of the thick wall portion 32A of the seal groove portion 33A, the seal groove portion 33A is created under the same manufacturing conditions as the vacuum heat insulating material 1 shown in FIGS.

In addition, if the width 9AW of the thin wall portion 9A is too small, cracks occur in the aluminum foil, and if the width 9AW of the thin wall portion 9A is too large, equipment with a large thermal welding pressure P is required. 9AW and the width 32AW of the thick portion 32A are preferably 0.5 to 5 mm. However, the width 9AW of the thin-walled portion 9A and the width 32AW of the thick-walled portion 32A vary depending on the number of thin-walled portions 9A, and a preferred value may be selected. There is no particular limitation here. As in the first embodiment, the thick portion 35A and the thickest portion 36A on the innermost side are heat-compressed as compared with the case where heat sealing is performed in a range other than the seal groove portion 33A of the sealing portion 58. The presser is gathered.

  In addition, there is no difference in other manufacturing conditions including heat welding conditions, and description is abbreviate | omitted.

  As described above, the vacuum heat insulating material 50 in the present embodiment is manufactured by the same manufacturing method as the vacuum heat insulating material 1 except for the width 9AW of the thin portion 9A and the width 32AW of the thick portion 32A of the seal groove portion 33A.

  Further, in the vacuum heat insulating material 50 in the present embodiment, the seal groove portion 33A provided in the sealing portion 58 located on the side 31A that has been heat-welded and the sides 34E and 34F that serve as openings for insertion have the same shape. However, it may be manufactured by the same manufacturing method as the vacuum heat insulating material 40 in the second embodiment. In other words, the sealing portion 58 located on the side 34E serving as the insertion opening may not be provided with the seal groove portion 33A, and a certain area may be pressurized with a certain pressure and thermally welded at a certain temperature.

  As described above, in the present embodiment, the vacuum heat insulating material 50 has the thickness 9AW and the thick wall of the thin portion 9A in the thick portion 32A thicker than the thin portion 9A sandwiched between the thin portion 9A and the thin portion 9A. Since the width 32AW of the portion 32A is formed uniformly or almost uniformly, a large number of recesses are provided per unit width. Therefore, even if a thermal welding failure occurs at one location of the recess, thermal welding is performed on the remaining recesses. Therefore, gas intrusion can be minimized. In particular, when glass fiber is used as the filler, the core material sandwiched during the thermal welding as an interstitial material is often heat-deformed and forms a through-hole in the thin portion. The effect becomes more prominent.

(Embodiment 4)
FIG. 10 is a plan view of a vacuum heat insulating material using the bag body according to the fourth embodiment of the present invention, and FIG. 11 is a side sealing portion serving as a filling insertion opening in the bag body of the same embodiment. It is sectional drawing which shows a heating compression jig.

  The difference in the manufacturing method between the vacuum heat insulating material 60 of the fourth embodiment shown in FIGS. 10 and 11 and the vacuum heat insulating material 1 of the first embodiment shown in FIGS. 1 to 4 is that the thin wall portion 9B of the seal groove portion 33B. This occurs only in the width 9BW of the thick portion and the width 32BW of the thick portion 32B. That is, the vacuum heat insulating material 1 in FIG. 4 of Embodiment 1 is the same as the vacuum heat insulating material 1, but the width 9W of the thin portion 9 of the seal groove portion 33 composed of the thin portion 9 and the thick portion 32 is the width 32W of the thick portion 32. In the vacuum heat insulating material 60 of the fourth embodiment, the width of the thin portion 9B is larger in the thick portion 32B than the thin portion 9B sandwiched between the thin portion 9B and the thin portion 9B. 9BW is larger than the width 32BW of the thick part 32B.

  In FIG. 11, the width of the convex portion 13 of the upper heating and compression jig 62 is larger than the width of the concave portion sandwiched between the convex portions 13 of the upper heating and compression jig 62.

  Here, although not shown, the corner of the convex portion 13 has an R shape.

  Next, the manufacturing method of the vacuum heat insulating material 60 based on FIG.10 and FIG.11, the manufacturing method of the vacuum heat insulating material 1 of Embodiment 1, or the manufacturing method of the vacuum heat insulating material 40 of Embodiment 2, or Embodiment The difference from the method for manufacturing the vacuum heat insulating material 3 in FIG.

  The difference in the manufacturing method between the vacuum heat insulating material 60 of the fourth embodiment shown in FIGS. 10 and 11 and the vacuum heat insulating material 1 of the first embodiment shown in FIGS. 1 to 4 is that the thin wall portion 9B of the seal groove portion 33B. This occurs only in the width 9BW of the thick portion and the width 32BW of the thick portion 32B. That is, the vacuum heat insulating material 1 shown in FIG. 4 of Embodiment 1 is the same as the vacuum heat insulating material 1, the width 9 W of the thin portion 9 of the seal groove portion 33 including the thin portion 9 and the thick portion 32 is the width of the thick portion 32. Although it is smaller than 32W, in the vacuum heat insulating material 60 of the fourth embodiment, in the thick part 32B thicker than the thin part 9B sandwiched between the thin part 9B and the thin part 9B, the thin part 9B The width 9BW is formed larger than the width 32BW of the thick portion 32B, and a sealing portion 68 as shown in FIG. 11 is formed.

  Here, except for the width 9BW of the thin-walled portion 9B and the width 32BW of the thick-walled portion 32B of the seal groove portion 33B, it is created under the same manufacturing conditions as those of the vacuum heat insulating material 1 shown in FIGS.

  Further, if the width 9BW of the thin wall portion 9B is too small, cracks occur in the aluminum foil, and if the width 9BW of the thin wall portion 9B is too large, a facility with a large thermal welding pressure P is required. 9BW is preferably 1 to 5 mm, and the width 32BW of the thick portion 32B is preferably 0.5 to 4 mm. However, the width 9BW of the thin-walled portion 9B and the width 32BW of the thick-walled portion 32B vary depending on the number of thin-walled portions 9B, and a preferable value may be selected, and is not particularly limited.

  Here, the thick portion 32B, the outermost thick portion 35B, and the innermost thick portion 36B are heated and compressed as compared with the case where heat sealing is performed in a range other than the seal groove portion 33B of the sealing portion 68. At this time, as in the first embodiment, the presser is gathered.

  In addition, there is no difference in other manufacturing conditions including heat welding conditions, and description is abbreviate | omitted.

  As described above, the vacuum heat insulating material 60 of the present embodiment is manufactured by the same manufacturing method as the vacuum heat insulating material 1 except for the width 9BW of the thin portion 9B and the width 32BW of the thick portion 32B of the seal groove portion 33B.

  Further, in the vacuum heat insulating material 60 of the present embodiment, the seal groove portion 33B provided in the sealing portion 68 located on the side 31B that is heat-welded and the sides 34G and 34H that serve as openings for insertion have the same shape. However, it may be manufactured by the same manufacturing method as the vacuum heat insulating material 40 of the second embodiment. In other words, the sealing portion 68 positioned on the side 34G serving as the opening for insertion may not be provided with the seal groove portion 33B, and a certain area may be pressurized with a certain pressure and thermally welded at a certain temperature.

  As described above, the vacuum heat insulating material 60 according to the present embodiment has the thickness 9BW of the thin portion 9B thick in the thick portion 32B thicker than the thin portion 9B sandwiched between the thin portion 9B and the thin portion 9B. By making it larger than the width 32BW of the part 32B, in the thin part 9B of the heat-welded layer, the permeation area of gas and moisture entering from the end surface of the outer periphery of the jacket material is reduced, and the permeation resistance of gas and moisture is increased. Since the permeation rate of gas and moisture is reduced, it is possible to provide a highly airtight bag body that further suppresses the amount of gas and moisture that permeate with time and maintains excellent vacuum performance over a long period of time.

  Further, since the width 9BW of the thin portion 9B is made larger than the width 32BW of the thick portion 32B, the air existing between the jacket materials 4 is easily escaped when the jacket materials 4 are heat-sealed. The generation of voids in the thick part 32B is suppressed.

  The bag body according to the present invention has a thin-walled portion where the thickness of the heat-welded layer on the thermally welded side is locally thin, so that the thin-walled portion of the heat-welded layer enters from the end surface of the outer periphery of the jacket material. Since the gas and moisture permeation area is reduced, and the amount of gas and moisture that permeate can be suppressed over time, it can be used as a vacuum bag for refrigerators, vending machines, etc. It can be applied to applications.

1, 40, 50, 60 Vacuum insulation material 4 Cover material 7 Heat-welded layer 9, 9A, 9B Thin-walled portion 31 Heat-welded side 32, 32A, 32B Thick-walled portion 33, 33A, 33B Seal groove portion 34B, 34C, 34D, 34E, 34F Sides 35, 35A, 35B which become openings for insertion Thick part 36 on the outermost side 36, 36A, 36B Thick part 37 on the innermost side 37

Claims (12)

An opening made of a heat-weldable jacket material, in which one piece of the jacket material is folded in half, and at least one of the sides connected to the bent portion is heat-welded, and the remaining side is an opening for filling. In the bag body, when the cross-section when cutting the thermal welded portion in a plane perpendicular to the thermally welded side at least a part of the sides where the outer peripheral portions of the jacket material are thermally welded, The thermal welding layer of any one of the jacket materials located on the thermally welded side has at least two concave portions, and the average thermal welding is applied to the thermal welding layer at the deepest portion of the concave portion. A seal groove portion comprising a thin wall portion thinner than the thickness of the layer and thick wall portions located at both ends of the thin wall portion and thicker than the average thickness of the heat-welded layer is provided, and the remainder serving as an opening for filling insertion The seal groove portion is provided on at least the side of the side connected to the bent portion. Bag to butterfly. The bag according to claim 1, wherein a seal groove is provided on a side not connected to the bent portion that becomes an opening for insertion. 2. The bag according to claim 1, wherein no seal groove is provided on a side that does not connect to the bent portion serving as an opening for insertion. 4. The thick portion thicker than the thin portion sandwiched between the thin portion and the thin portion, the width of the thin portion is smaller than the width of the thick portion. The bag according to any one of the above. The thick portion thicker than the thin portion sandwiched between the thin portion and the thin portion, the width of the thin portion and the width of the thick portion are equal or substantially equal. The bag according to any one of 1 to 3. 4. The thick portion thicker than the thin portion sandwiched between the thin portion and the thin portion, the width of the thin portion is made larger than the width of the thick portion. The bag according to any one of the above. 7. The thickness of the outermost thick portion is made thicker than the thickness of the heat-welded layer located between the outer periphery and the outermost thick portion. 7. The bag described in 1. The thickness of the innermost thick part is made thicker than the thickness of the heat-welded layer located on the inner side of the innermost thick part. The described bag. The bag according to any one of claims 1 to 8, wherein the filling is made of glass fiber. An opening made of a heat-weldable jacket material, in which one piece of the jacket material is folded in half, and at least one of the sides connected to the bent portion is heat-welded, and the remaining side is an opening for filling. In the bag body, when the cross-section when cutting the thermal welded portion in a plane perpendicular to the thermally welded side at least a part of the sides where the outer peripheral portions of the jacket material are thermally welded, The thermal welding layer of any one of the jacket materials located on the thermally welded side has at least two concave portions, and the average thermal welding is applied to the thermal welding layer at the deepest portion of the concave portion. A seal groove portion comprising a thin wall portion thinner than the thickness of the layer and a thick wall portion positioned at both ends of the thin wall portion and thicker than the average thickness of the heat-welded layer is provided, and after inserting the filling, The seal groove portion on at least the side of the remaining side that becomes the opening of the bent portion is connected to the bent portion. Method for producing a bag, characterized in that provided. The method for manufacturing a bag according to claim 10, wherein a seal groove is provided on a side that does not connect to the bent portion serving as an opening for insertion. The method for manufacturing a bag body according to claim 10, wherein no seal groove portion is provided on a side that does not lead to the bent portion serving as an opening for insertion.

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