JP2015085682A - Gel coated body and production method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gel coated body which is not sticky in side parts of the gel coated body due to a gel material, has a constant thickness of a surface film, has a good use feeling as e.g. a puff for liquid foundation and is consistent in quality.SOLUTION: A gel coated body includes a gel material 11, two primary plastic films 21A and 21B covering both sides of the gel material 11 and two secondary plastic films 31A and 31B covering the outer surfaces of the primary plastic films 21A and 21B. On the outer side of edge parts 23A and 23b of the primary plastic films 21A and 21B, the edge parts 33A and 33B of the secondary plastic films 31A and 33B are fused together so that the gel material 11 is not exposed.

Description

  The present invention relates to a gel coated body in which a gel material is coated with a plastic sheet and a method for producing the same.

As a liquid foundation puff, a puff made of a gel-coated body in which a gel material is coated with a plastic film has been proposed.
As a conventional gel covering, (a) a gel material covered with two elastic films, or a gel material covered with an adhesive covered with two elastic films (Patent Document 1), (B) A resin coating film is formed on the inner wall of a mold by spraying, the gel composition is filled in the mold and cured, and the gel material is covered with the resin coating film (Patent Document 2).

However, the gel coated body of (a) is easy to be sandwiched between the edges of two stretchable films by the gel material or the gel material covered with an adhesive at the time of manufacture. There was a risk that the part would be sticky with gel burrs.
In addition, the gel coated body (b) has a problem that the film thickness of the resin coating film is difficult to be constant, and it is difficult to obtain a constant quality product.

JP 2005-177163 A JP 2009-201833 A

  The present invention has been made in view of the above-described points, and the gel coated body has a uniform quality, a feeling of use with a uniform thickness, the surface of the gel coated body is not sticky with a gel material, and the thickness of the surface film is constant. And an object of the present invention is to provide a manufacturing method thereof.

  The invention of claim 1 comprises a gel material, two primary plastic films covering both sides of the gel material, and two secondary plastic films covering the outer surface of the primary plastic film, According to the gel covering, the edges of the two secondary plastic films are welded to each other outside the edges.

  The invention of claim 2 comprises a gel material and two plastic films covering both sides of the gel material, and the gel material has a thickness of 100 μm or less protruding outward from the main body and the edge of the main body. The gel covering is characterized in that the two plastic films are in close contact with the main body of the gel material and both surfaces of the burr.

  The invention of claim 3 is characterized in that, in claim 2, the protruding amount of the burr from the edge of the main body of the gel material is 0.1 to 0.5 mm.

  In the invention of claim 4, the primary plastic film is sucked into the cavity of the primary mold lower mold, the gel composition is filled on the primary plastic film in the cavity, and the other mold is placed on the primary mold lower mold. A primary plastic film is placed on the gel composition, and the gel composition is cured by heating to form a gel material, forming an initial molded body in which both sides of the gel material are covered with the two primary plastic films. Forming a primary gel coating by cutting the primary plastic film around the gel material of the initial molded body, and forming the secondary plastic film in the cavity of the lower mold for secondary molding. So that the cut portion of the primary plastic film is positioned at the parting portion of the lower mold for secondary molding. It arrange | positions on the said secondary plastic film in the cavity of the said lower mold | type for secondary shaping | molding, arrange | positions another secondary plastic film on the said lower mold | type for secondary shaping | molding, it covers on the said primary gel coating body, and heat A secondary gel coating forming step of forming a secondary gel coating in which the primary gel coating is covered with two secondary plastic films, and an edge of the primary plastic film of the secondary gel coating The gel material was covered with the primary plastic film and the secondary plastic film by the welding / cutting process of welding the two secondary plastic films on the outer side of the part and cutting on the welded part or on the outer side. The present invention relates to a method for producing a gel coated body characterized by obtaining a gel coated body.

  According to the invention of claim 5, one plastic film of two plastics is placed in close contact with the cavity of the lower mold for molding, and arranged outside the cavity so as to overlap the parting portion, and the inside of the cavity The gel composition is filled on one plastic film, the other plastic film is disposed on the lower mold so as to cover the gel composition in the cavity and the one plastic film outside the cavity, and the other The upper surface of the gel composition is rubbed into a flat surface from above the plastic film, and the excess portion of the gel composition is protruded between the two plastic films outside the cavity so that the thickness of the protruding portion is 100 μm. The gel composition is cured by heating, and the cavity portion is A molded body in which the two plastic films are in close contact with both sides of a gel material consisting of a body portion formed by curing the composition and a burr having a thickness of 100 μm or less formed by curing the gel composition at the protruding portion is formed. In addition, the present invention relates to a method for producing a gel covering, wherein the two plastic films and the burr are cut together on the base side of the burr to form a gel covering.

  The invention of claim 6 is characterized in that, in claim 5, the two plastic films are cut together with the burr at a position of 0.1 to 0.5 mm from the base of the burr.

  According to the invention of claim 1, since the edges of the two secondary plastic films covering the primary plastic outer surfaces of the two sheets on both sides of the gel material are welded to each other outside the edge of the primary plastic film, The edge of the primary plastic film is covered with the welded edge of the secondary plastic film, and the gel material is not exposed to the outside of the gel covering from between the edges of the primary plastic film of the two sheets. The gel material is not sticky when the body is used, and the feeling of use is good.

  According to the invention of claim 2, since the two plastic films are in close contact with the gel body and the burrs, and the thickness of the burrs is as thin as 100 μm or less, the user of the gel coverings Even if the edge is touched, there is almost no feeling of contact with the burr of the gel material, and the gel material is not sticky, and the feeling of use is good.

  According to the invention of claim 3, in the gel coated body of claim 2, since it is a burr from the edge of the main body part of the gel material, there is little discomfort at the edge of the gel coated body, and the usability is good.

  According to the invention of claim 4, since the gel covering of claim 1 is manufactured using the primary plastic film and the secondary plastic film, the thickness of the film on both sides of the gel material can be made constant. Sometimes it is easy to obtain a gel-coated body which is not sticky with a gel material, has a good feeling of use and has a constant quality.

  According to the inventions of Claims 5 and 6, since the gel coverings of Claims 2 and 3 are produced using two plastic films, the thickness of the film on both sides of the gel material can be made constant, Moreover, since the thickness of the burr is reduced to 100 μm or less, it is possible to easily obtain a gel coated body that is not sticky with a gel material during use, has a good feeling of use, and has a constant quality.

It is sectional drawing of the gel coating body of 1st Example. It is sectional drawing of an example of the lower mold | type for primary shaping | molding used with the manufacturing method of 1st Example of this invention. It is sectional drawing which shows the time of attraction | suction in the cavity of a primary plastic film. It is sectional drawing which shows the time of filling of a gel composition. It is sectional drawing which shows the time of covering a primary plastic film on a gel composition. It is sectional drawing which shows the time of heat-hardening of a gel composition. It is sectional drawing which shows the time of a cutting | disconnection of a primary plastic film. It is sectional drawing at the time of arrangement | positioning a primary gel coating | coated body to the lower mold | type for secondary shaping | molding. It is sectional drawing at the time of covering a secondary plastic film on a primary gel coating body, and heating. It is sectional drawing which shows the time of welding and a cutting | disconnection. It is sectional drawing of the gel coating body of 2nd Example. It is sectional drawing of an example of the shaping | molding lower die used with the manufacturing method of 2nd Example. It is sectional drawing which shows at the time of attraction | suction into the cavity of one plastic film. It is sectional drawing which shows the time of filling of a gel composition. It is sectional drawing which shows the time of covering the other plastic film on a gel composition, and rubbing. It is sectional drawing which shows the time of heat-hardening a gel composition combining an upper mold | type for shaping | molding. It is sectional drawing which shows the time of burr | cutting of a plastic film and a gel raw material.

  The gel covering of the present invention is not limited to a puff for a liquid foundation, but is a wedge gel that surrounds a body part for protecting an infant's body in a medical institution, a donut gel laid under the head, It can be applied to square gel, mattress gel, gel mat of LED light therapy device, and the like. Hereinafter, the present invention will be described by taking as an example a gel covering used as a puff for liquid foundation.

  1 includes a gel material 11, two primary plastic films 21A and 21B covering both surfaces of the gel material 11, and two outer surfaces of the primary plastics 21A and 21B. It consists of a sheet of secondary plastic films 31A and 31B.

  The gel material 11 is preferably urethane gel. The urethane gel is an organo-based gel, and is obtained by heat curing a gel composition (two-component polyurethane liquid elastomer) composed of a mixture containing a polyol and an isocyanate. The gel composition of the present invention is a thermosetting two-component polyurethane liquid elastomer, and the gel after curing preferably has high adhesiveness in order to enhance adhesion to a plastic film. The gel material 11 has an Asker C hardness meter, preferably 0-30. The thickness of the gel material 11 is preferably 2 to 20 mm for puffing. The shape of the illustrated gel material 11 is a substantially square shape in plan view, and may have a burr 13 on a part of the outer periphery of the side portion. When the burr 13 is formed by covering the gel material 11 with two primary plastic films 21A and 21B, the gel material protrudes between the two primary plastic films 21A and 21B at the parting portion of the primary molding die. It is a thing.

  The two primary plastic films 21 </ b> A and 21 </ b> B correspond to the inner plastic film in the gel covering 10, and have good adhesion to the gel material 11 and followability to deformation of the gel material 11. Those having the property (elongation rate of JIS K 7311 of 300% or more) are preferable. As the stretchable plastic film, a polyether-based or polyester-based urethane film is preferable. Since the urethane film has high adhesiveness to the urethane gel, when the gel material 11 is made of urethane gel, both adhere well and the usability and appearance are good. The thickness of the primary plastic films 21A and 21B is preferably 10 to 50 μm in order to improve the feeling of use. This plastic film is preferably thermoplastic. At the time of molding, heating is performed in order to promote the curing of the thermosetting urethane gel composition. However, in order to improve the adhesion between the thermosetting urethane gel composition and the urethane film, it is preferably thermoplastic.

  When the burrs 13 are present in the gel material 11, the two primary plastic films 21A and 21B are provided on both sides of the gel material 11 so as to cover the burrs 13, and the two primary plastic films 21A. , 21B. The burr 13 is sandwiched between the edges. In the case of a puff, the protrusion amount of the burr 13 is about 0 to 0.5 mm. The burr 13 has a thickness of 10 to 150 μm.

  The two secondary plastic films 31A and 31B correspond to the outer plastic film in the gel covering 10, and have good adhesion to the primary plastic films 21A and 21B, followability to deformation of the gel material 11, and the like. Therefore, those having stretchability (elongation rate of JIS K 7311 of 300% or more) are preferable. In particular, if the secondary plastic films 31A and 31B are made of a polyether-based or polyester-based urethane film together with the primary plastic films 21A and 21B, the primary plastics are in good contact with each other due to good blocking properties of both films. The gel covering 10 having high integrity between the films 21A and 21B and the secondary plastic films 31A and 31B is obtained. The thickness of the secondary plastic films 31A and 31B is preferably 10 to 50 μm in order to improve the feeling of use.

  The two secondary plastic films 31A and 31B cover the outer surfaces of the primary plastic films 21A and 21B, and the two secondary plastic films are positioned outside the edges 23A and 23B of the primary plastic films 21A and 21B. The edges 33A and 33B of the films 31A and 31B are welded together. Accordingly, even if a part of the side of the gel material 11 is exposed between the edges of the primary plastic films 21A and 21B, or even if the burr 13 is present, Since the secondary plastic films 31A and 31B are covered with the welded edges 33A and 33B, the side portions of the gel covering 10 are not sticky with the gel material 11, and the feeling of use of the gel covering 10 is good. Become. The width of the welded edges 33A and 33B (length projecting outward) is preferably 0.5 to 15 mm in order to ensure joining by welding.

Next, the example of the manufacturing method of the gel coating body 10 of the said 1st Example is demonstrated. The manufacturing method of the gel covering 10 includes a primary gel covering forming process, a secondary gel covering forming process, and a welding / cutting process.
FIG. 2 shows an example of the lower mold 41 for primary molding used in the primary gel coating forming process. The illustrated lower mold 41 for primary molding is made of a porous material capable of vacuum suction, and in combination with the suction box 51, sucks a plastic film into the cavity 43 by suction using a suction device (not shown) such as a vacuum suction pump. It is possible. The cavity 43 has a concave puff shape. The illustrated primary molding lower mold 41 is provided with a plurality of the cavities 43 so that a plurality of primary gel coverings can be molded. The upper surface of the lower mold 41 for primary molding, that is, the portion between the cavities 43 and the outer peripheral edge form a parting part (divided part) 47 with the upper mold.

  In the primary gel-forming covering forming step, first, as shown in (3-1) and (3-2) in FIG. 3, the primary plastic film 21A is held on the lower mold 41 for primary molding, Suction into the cavity 43. Accordingly, the primary plastic film 21 </ b> A is in close contact with the inner surface of the cavity and is in close contact with the surface of the parting portion 47 around the cavity 43.

  Next, as shown in (4-1) and (4-2) of FIG. 4, the gel composition 11 a is filled on the primary plastic film 21 </ b> A in each cavity 43. The gel composition 11a is cured by heating to become a gel material, and a two-component polyurethane liquid elastomer is preferable. The filling of the gel composition 11 a is made larger than the volume of the cavity 43.

  Next, as shown in FIG. 5 (5-1), another primary plastic film 21B is disposed on the lower mold 41 for primary molding, and the primary plastic film of the gel composition 11a and the parting portion 47 is placed. Cover 21A. At that time, the upper surface of the gel composition 11a is rubbed from above the primary plastic film 21B with a smoothing member 81 such as a roller or a spatula to make the upper surface of the gel composition 11a flat, and the gel composition 11a As shown in (5-2) of FIG. 5, the primary plastic film 21B is brought into close contact with the upper surface of the gel composition 11a. Further, when the smoothing member 81 is rubbed on the primary plastic film 21B to flatten the upper surface of the gel composition 11a or expel the air reservoir, the excess of the gel composition 11a in the cavity 43 is obtained. The amount protrudes between the primary plastic films 21A and 21B of the parting portion 47 to form the gel composition burr 13a.

  Then, as shown in FIG. 6, the upper mold 51 for primary molding is placed on the primary plastic film 21B, closed in combination with the lower mold 41 for primary molding, and the gel composition 11a is heated with a heating device. The gel material 11 is cured. As the heating device, it is preferable to use a device in which heating means such as a heater is embedded in the primary mold lower mold 41 and the primary mold upper mold 51. The heating temperature is a temperature at which the gel composition 11a is cured and a temperature at which the primary plastic films 21A and 21B are not melted. The gel composition 11a is a two-component polyurethane liquid elastomer, and the primary plastic When film 21A, 21B is a urethane film, 60-100 degreeC is preferable and the heating time in that case is preferable 5-60 minutes. Further, when the gel composition 11a is a two-component polyurethane liquid elastomer and the primary plastic films 21A and 21B are urethane films, the adhesive integrity between the gel material 11 and the primary plastic films 21A and 21B is good. is there. By the heating, an initial molded body 10A in which both sides of the gel material 11 are covered with the two primary plastic films 21A and 21B is obtained. The gel composition burr 13a becomes a gel material burr 13.

  The initial form 10A is removed from the mold, and the primary plastic films 21A and 21B are placed around the gel material 11 of the initial form 10A as shown in (7-1) and (7-2) of FIG. Then, the gel material 11 is cut together with the burrs 13 of the gel material 11 to form a primary gel covering 10B. The cutting position is preferably about 0 to 0.5 mm from the end of the main body portion of the gel material 11 (that is, the portion formed in the cavity). Reference numerals 23A and 23B are edges of the primary plastic films 21A and 21B formed by the cutting.

  In the secondary gel covering formation process, as shown in FIGS. 8 (8-1) and (8-2), the secondary plastic film 31A is held on the secondary mold lower mold 61 to perform secondary molding. Suction into the cavity 63 of the lower mold 61. As a result, the primary plastic film 31 </ b> A is in close contact with the inner surface of the cavity of the lower mold for secondary molding 61 and is in close contact with the surface of the parting portion 67 of the lower mold for secondary molding 61 around the cavity 63. The secondary molding lower mold 61 is made of a porous material that can be vacuum-sucked similarly to the secondary molding lower mold 41, and is combined with the suction box 51 shown in FIG. The cavity 63 can be sucked. The cavity 63 has a concave puff shape, and a plurality of the cavities 63 are formed in the secondary molding lower mold 61 like the primary molding lower mold 41 shown in FIG. The upper surface of the lower mold 61 for secondary molding, that is, the portion between the cavities 63 and the outer peripheral edge form a parting portion 67 with the upper mold. Since the primary plastic film and the secondary plastic film are thin, the primary molding lower mold 41 may be used also as the secondary molding lower mold 61.

Next, as shown in (8-2) and (8-3) of FIG. 8, the primary gel coating 10 </ b> B includes the edge portions (cut portions) 23 </ b> A and 23 </ b> B of the primary plastic films 21 </ b> A and 21 </ b> B. It is arranged on the secondary plastic film 31 </ b> A in the cavity 63 of the lower mold for secondary molding 61 so as to be positioned in the parting portion 67 of the lower mold for secondary molding 61. The edge portions 23A and 23B of the primary plastic films 21A and 21B are positioned on the parting portion 67 of the lower mold 61 for secondary molding. The case where it is located in contact with the edge on the cavity 63 side of 67 is included.
Next, as shown in (9-1) of FIG. 9, another secondary plastic film 31B is arranged on the lower mold 61 for secondary molding, and the primary gel coating 10B and the parting portion 67 are Cover the secondary plastic film 31A.

  Thereafter, as shown in (9-2) of FIG. 9, the upper mold 71 for secondary molding is disposed on the secondary plastic film 31B, and the mold is closed in combination with the lower mold 61 for secondary molding. And the primary plastic films 21A and 21B and the secondary plastic films 31A and 31B on both sides of the primary gel coated body 10B are softened to soften the secondary molding lower mold 61 and the secondary molding upper mold 71. Along the inside. Further, the primary plastic films 21A and 21B and the secondary plastic films 31A and 31B become familiar with each other and adhere to each other by the heating. In particular, when the primary plastic films 21A and 21B and the secondary plastic films 31A and 31B are urethane films, they are closely adhered to each other due to blocking properties. When the primary plastic films 21A and 21B and the secondary plastic films 31A and 31B are urethane films, the heating temperature is preferably 60 to 130 ° C., and the heating time is preferably 0.5 to 60 minutes. After the heating, it is demolded as shown in (9-3) to obtain a secondary gel coated body 10C in which the primary gel coated body 10B is covered with the two secondary plastic films 31A and 31B.

In the welding / cutting step, as shown in (10-1) of FIG. 10, first, the two sheets of the two outside the edge portions 23A, 23B of the primary plastic films 21A, 21B in the secondary gel coating 10C. Secondary plastic films 31A and 31B are welded. Thus, the entire circumference of the primary plastic films 31A and 31B is covered with the secondary plastic films 31A and 31B, and the outer circumferences of the edges 23A and 23B of the primary plastic films 21A and 21B are covered with the secondary plastic film 31A. , 31B. As a welding method, general welding methods such as ultrasonic welding, vibration welding, and thermal welding can be adopted.
Next, as shown in FIG. 10 (10-2), the secondary plastic films 31A and 31B are cut at the position of the welded portion 32 or outside thereof, and the gel covering 10 shown in FIG. Obtained as shown in (10-3) of FIG. Reference numerals 33A and 33B are edges of the secondary plastic films 31A and 31B formed by the cutting. Moreover, the said cutting | disconnection is not restricted to the cutting | disconnection after welding, You may cut | disconnect (melting | fusing), welding.

  11 includes a gel material 110 and two plastic films 210A and 210B that cover both surfaces of the gel material 110.

  The gel material 110 is preferably urethane gel. The urethane gel is an organo-based gel, and is obtained by heat curing a gel composition (two-component polyurethane liquid elastomer) composed of a mixture containing a polyol and an isocyanate. The gel composition of the present invention is a thermosetting two-component polyurethane liquid elastomer, and the gel after curing preferably has high adhesiveness in order to enhance adhesion to a plastic film. The gel material 110 has an Asker C hardness meter, preferably 0-30. The gel material 110 includes a main body portion 111 and a burr 130 protruding outward from a part of the outer periphery of the side portion. The main body 111 preferably has a thickness of 2 to 20 mm for puffing. In addition, the shape of the main body 111 is substantially rectangular in plan view in this embodiment. When the burr 130 is formed by covering the gel composition with the two plastic films 210A and 210B, the gel composition protrudes between the two plastic films 210A and 210B at the parting portion of the molding die, and heat is generated. It is hardened. The burr 130 has a thickness of 100 μm or less, preferably 10 to 100 μm, more preferably 10 to 50 μm, and a protrusion amount from the main body is preferably 0.1 to 0.5 mm.

  The two plastic films 210 </ b> A and 210 </ b> B have stretchability (elongation rate of 300% or more of JIS K 7311) in order to improve adhesion to the gel material 11 and followability to deformation of the gel material 11. Those are preferred. As the stretchable plastic film, a polyether-based or polyester-based urethane film is preferable. Since the urethane film has high adhesiveness to the urethane gel, when the gel material 11 is made of urethane gel, both adhere well and the usability and appearance are good. The thickness of the plastic films 210A and 210B is preferably 10 to 50 μm in order to improve usability and strength. This plastic film is preferably thermoplastic. At the time of molding, heating is performed in order to promote the curing of the thermosetting urethane gel composition. However, in order to improve the adhesion between the thermosetting urethane gel composition and the urethane film, it is preferably thermoplastic.

  The two plastic films 210A and 210B are provided on both sides of the gel material 110 so as to cover the tip of the burr 130, and the burr 130 is provided between the edges 213A and 213B of the two plastic films 210A and 210B. It is sandwiched.

  Of the two plastic films 210A and 210B, one plastic film 210A is composed of a housing portion 211A having a concave shape and an edge portion 213A projecting outward in a flange shape from the outer peripheral edge of the housing portion 211A. ing. The main body 111 of the gel material 110 is accommodated in the concave accommodating portion 211A of the one plastic film 210A, and the burr 130 of the gel material 110 is located at the edge 213A.

The other plastic film 211B has a flat surface and covers the surface of the main body 111 of the gel material 110 and the surface of the burr 113 accommodated in the accommodating portion 211A of the one plastic film 210A.
The two plastic films 210 </ b> A and 210 </ b> B are adhered and adhered to both surfaces of the gel material 110 due to the adhesiveness of the gel material 110.

  Next, the example of the manufacturing method of the gel coating body 100 of the said 2nd Example is demonstrated. The manufacturing method of the said gel covering 100 has the setting process of one plastic film, the filling process of a gel composition, the setting and flattening process of the other plastic film, a heating process, and a cutting process.

  FIG. 12 shows an example of the molding lower mold 410 used. The illustrated lower mold 410 is made of a porous material that can be vacuum-sucked, and is combined with the suction box 510 to suck a plastic film into the cavity 430 by suction using a suction device (not shown) such as a vacuum suction pump. , Close contact is possible. The cavity 430 has a concave puff shape. The illustrated lower mold 410 is provided with a plurality of cavities 430 so that a plurality of gel coverings can be formed. The upper surface of the lower mold 41 for primary molding, that is, the portion between the cavities 43 and the outer peripheral edge form a parting part (divided part) 470 with the upper mold.

  In one plastic film setting step, as shown in FIGS. 13 (13-1) and (13-2), one of the two plastic films 210A is held on the lower mold 410 for molding. And sucked into the cavity 43. As a result, the plastic film 210A deforms and adheres to the inner surface of the cavity and also adheres to the surface of the parting part 470 (also referred to as a parting surface) around the cavity 430. In the one plastic film 210 </ b> A, a portion formed in close contact with the inner surface of the cavity becomes a concave accommodating portion 211 </ b> A.

  In the gel composition filling step, as shown in (14-1) and (14-2) of FIG. 14, the gel composition is formed on the plastic film 210A in each cavity 430, that is, in the accommodating portion 211A of the plastic film 210A. The object 110a is filled. The gel composition 110a is cured by heating to become a gel material, and a two-component polyurethane liquid elastomer is preferable. The filling of the gel composition 110 a is made larger than the volume of the cavity 430.

  In the other plastic film setting and upper surface flattening step, as shown in FIG. 15 (15-1), the other plastic film 210B is disposed on the lower molding die 410, and the gel composition 110a and the gel composition 110a. Cover the plastic film 210A of the parting part 470. Then, the upper surface of the gel composition 110a is rubbed with the smoothing member 810 from above the plastic film 210B, and the excess portion of the gel composition 110a is placed between the two plastic films 210A and 210B of the parting part 470. As shown in FIG. 15 (15-2), the gel composition 110a is made to protrude so that the upper surface of the gel composition 110a is flat and the air reservoir is expelled from between the gel composition 110a and the primary plastic film 210B. The other plastic film 210B is adhered to the upper surface of the gel composition 110a.

  The smoothing member 810 may be a brush or a roller. In particular, a roller longer than the width or length of the cavity is used, and both ends of the roller are positioned on the parting part 470. The upper surface of the other plastic film 210 is preferably rolled. Accordingly, the upper surface of the gel composition 110a can be efficiently planarized, and an excess portion of the gel composition 110a in the cavity 430 is disposed between the two plastic films 210A and 210B of the parting portion 470. The gel composition burr 130a can be protruded, and the gel composition main body 111a can be formed in the cavity 43. In addition, by setting the filling amount of the gel composition 110a in the cavity 43 to about 110% to 150% with respect to the volume of the cavity 430, the thickness of the burr 130a of the gel composition, that is, the gel material. The thickness of the burr 130 of 110 is easily set to 10 to 100 μm.

  In the heating step, as shown in FIG. 16, an upper mold 510 is placed on the other plastic film 210B, is closed in combination with the lower mold 410, and the gel composition 110a is heated with a heating device. Heat to cure and make a gel material. As the heating device, it is preferable to use a device in which heating means such as a heater is embedded in the lower mold 410 and the upper mold 510. The heating temperature is a temperature at which curing of the gel composition 110a is promoted and a temperature at which the plastic films 210A and 210B do not melt, and the gel composition 110a is a two-component polyurethane liquid elastomer, When plastic film 210A, 210B is a urethane film, 60-100 degreeC is preferable and the heating time in that case is 5-60 minutes. When the gel composition 110a is a two-component polyurethane liquid elastomer and the plastic films 210A and 210B are urethane films, the gel material and the plastic films 210A and 210B have good adhesion and adhesive integrity. . In the present invention, the two-component polyurethane liquid elastomer is cured to exhibit adhesiveness, and has a strong adhesive property by softening and adhering the same thermoplastic polyurethane plastic film in the cavity. It has gained. By the heating, a molded body (shown by reference numeral 100A in FIG. 17) before cutting is obtained in which both sides of the gel material 110 having the gel composition 110a cured are covered with the two plastic films 210A and 210B. The gel composition burr 130a is cured to become the gel material burr 130.

  The molded body before cutting is demolded, and as shown in FIGS. 17 (17-1) and (17-2), burrs around the main body portion 111 of the gel material 110 in the molded body 100A before cutting. On the base side of 130, the two plastic films 210A and 210B are cut together with the burrs 130 of the gel material 110 to form the gel covering 100 shown in FIG. The cutting position is preferably about 0 to 0.5 mm from the edge (end) of the main body 111 of the gel material 110 (that is, the portion formed in the cavity). Reference numerals 213A and 213B denote edges of the plastic films 210A and 210B formed by the cutting.

In the example of the manufacturing method, vacuum forming is used when the plastic film is closely attached to the inner surface of the cavity. However, a known pressure forming method may be used, or both vacuum forming and pressure forming may be used. May be.
Further, the gel covering of the present invention and the method for producing the same are not limited to the puffs for liquid foundation as described above, but a wedge gel that surrounds a part of the body for protecting an infant's body in a medical institution or the like, The present invention is applicable to donut gels laid down, square gels laid under the body, mattress gels, gel mats of LED light therapy devices, and the like.

10 Gel Covered Body of First Example 10A Initial Molded Body 10B Primary Gel Covered Body 10C Secondary Gel Covered Body 11 Gel Material 11a Gel Composition 13 Gel Material Burr 13a Gel Composition Burr 21A, 21B Primary Plastic Film 23A, 23B Edge of primary plastic film 31A, 31B Secondary plastic film 32 Welded portion 33A, 33B Edge of secondary plastic film 41 Lower mold for primary molding 51 Upper mold for primary molding 61 Lower mold for secondary molding 71 Secondary molding Upper mold 100 Gel covering body of second embodiment 110 Gel material 110a Gel composition 130 Gel material burr 130a Gel composition burr 210A, 210B Plastic film

Claims (7)

A gel material, two primary plastic films covering both sides of the gel material, and two secondary plastic films covering the outer surface of the primary plastic film,
The gel covering, wherein the edges of the two secondary plastic films are welded to each other outside the edge of the primary plastic film. It consists of a gel material and two plastic films covering both sides of the gel material,
The gel material is composed of a main body part and a burr having a thickness of 100 μm or less protruding outward from the edge of the main body part,
The two plastic films are in close contact with the main body of the gel material and both surfaces of the burr.   The gel covering according to claim 2, wherein the protruding amount of the burr from the edge of the main body of the gel material is 0.1 to 0.5 mm. A primary plastic film is sucked into a cavity of a lower mold for primary molding, a gel composition is filled on the primary plastic film in the cavity, and another primary plastic film is disposed on the lower mold for primary molding. Covering the gel composition, the gel composition is cured by heating to form a gel material, and an initial molded body in which both sides of the gel material are covered with the two primary plastic films is formed. A primary gel covering forming step of forming a primary gel covering by cutting the primary plastic film around the gel material;
The secondary plastic film is sucked into the cavity of the secondary mold lower mold, and the cut portion of the primary plastic film is positioned at the parting section of the secondary mold lower mold, It arrange | positions on the said secondary plastic film in the cavity of the said lower mold | type for secondary shaping | molding, arrange | positions another secondary plastic film on the said lower mold | type for secondary shaping | molding, it covers on the said primary gel coating | covering body, and is heated. And forming a secondary gel coating body in which the primary gel coating body is covered with two secondary plastic films, and
The gel material is formed by a welding / cutting step in which two secondary plastic films are welded outside the edge of the primary plastic film of the secondary gel coating, and cut at the welded portion or outside thereof. A method for producing a gel covering, comprising: obtaining a gel covering covered with a primary plastic film and the secondary plastic film. Place one plastic film of the two plastics in close contact with the cavity of the lower mold for molding and place it on the outside of the cavity so as to overlap the parting part,
The gel composition is filled on the one plastic film in the cavity, and the other plastic film is placed on the lower mold so as to cover the gel composition in the cavity and the one plastic film outside the cavity. Place and
The upper surface of the gel composition is rubbed flat on the other plastic film, and the excess portion of the gel composition protrudes between the two plastic films outside the cavity so that the thickness of the protruding portion To 100 μm or less,
A gel material comprising a main body portion obtained by hardening the gel composition by heating and hardening the gel composition in the cavity portion and a burr having a thickness of 100 μm or less formed by hardening the gel composition in the protruding portion. Forming a molded body in which the two plastic films are adhered to both sides,
A method for producing a gel-coated body comprising cutting the two plastic films and the burrs together on the base side of the burr to form a gel-coated body.   The method for producing a gel-coated body according to claim 5, wherein the two plastic films are cut together with the burr at a position of 0.1 to 0.5 mm from the base of the burr.   When the one plastic film is brought into close contact with the cavity of the lower mold for molding, the one plastic film is heated and then brought into close contact with the inside of the cavity by either vacuum forming or pressure forming. The manufacturing method of the gel coating body of Claim 5 or 6 characterized by these.

Images