WO2017170332A1 - 真空断熱材用積層体 - Google Patents
真空断熱材用積層体 Download PDFInfo
- Publication number
- WO2017170332A1 WO2017170332A1 PCT/JP2017/012261 JP2017012261W WO2017170332A1 WO 2017170332 A1 WO2017170332 A1 WO 2017170332A1 JP 2017012261 W JP2017012261 W JP 2017012261W WO 2017170332 A1 WO2017170332 A1 WO 2017170332A1
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- WIPO (PCT)
- Prior art keywords
- acid
- resin
- film
- polybutylene terephthalate
- glycol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
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- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
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- B32B7/04—Interconnection of layers
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
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- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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Definitions
- the present invention relates to a vacuum heat insulating material exterior body comprising a biaxially stretched polybutylene terephthalate film and a sealant layer. More specifically, the present invention relates to a biaxially stretched polybutylene terephthalate film that has excellent puncture strength and heat resistance and is useful as an exterior material for a vacuum heat insulating material.
- the vacuum heat insulating material is formed by enclosing a core material in an outer packaging material, depressurizing the inside of the outer packaging material to be in a vacuum state, and thermally welding and sealing the end portion of the outer packaging material. Since the convection of the gas is blocked by making the inside of the heat insulating material a vacuum state, the vacuum heat insulating material can exhibit high heat insulating performance. Moreover, in order to maintain the heat insulation performance of the vacuum heat insulating material for a long time, it is necessary to maintain the inside of the outer packaging material in a high vacuum state for a long time.
- the outer packaging material is required to have various functions such as a gas barrier property for preventing gas from permeating from the outside and a thermal adhesive property for covering and sealing the core material. Therefore, the outer packaging material is configured as a laminate having a plurality of films having these functional characteristics.
- a heat welding layer, a gas barrier layer, and a protective layer are laminated, and each layer is bonded via an adhesive or the like.
- Patent Document 2 discloses a film at 25 ° C. by adding a small amount of amorphous copolyethylene terephthalate (PET) to polyethylene terephthalate film or polyethylene terephthalate having high intrinsic viscosity and biaxially stretching under predetermined conditions.
- PET amorphous copolyethylene terephthalate
- the technology of having excellent processability was known. In this technique, since PET resin is used, durability is excellent. However, the piercing strength cannot be sufficiently increased only by the PET resin, and there is room for further study to further improve the piercing strength.
- Patent Document 3 a technique has been known that has an excellent processability for an application in which drawing is performed by using an unstretched PBT film having a specific range of stab displacement for exterior use of a lithium ion battery.
- PBT polybutylene terephthalate
- TD transverse direction
- PBT polybutylene terephthalate
- this conventional technique increases only the deformation speed in the MD direction, so that the elongation is low and the film is balanced in the machine direction (MD) and the transverse direction (TD). There was a problem of not becoming.
- Patent Document 5 discloses a polybutylene terephthalate (PBT) film formed by using a tubular simultaneous biaxial stretching method so that the breaking strength in four directions is not less than a specific value.
- PBT polybutylene terephthalate
- a technique of excellent mechanical properties and dimensional stability has been known.
- this conventional technique has a problem that the thickness accuracy is poor due to the manufacturing method and the puncture strength is low because the plane orientation coefficient does not increase.
- Patent Document 6 discloses that, in addition to polybutylene terephthalate (PBT), two types of resins such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) are alternately laminated to obtain high rigidity and high temperature.
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- the technology of being excellent in the dimensional stability and moldability of is known.
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- the stretching temperature is higher than that of polybutylene terephthalate (PBT).
- PBT Polybutylene terephthalate
- the present invention has been made against the background of the problems of the prior art. That is, the object of the present invention is not only capable of suppressing the occurrence of pinholes due to piercing of these needle-like short fiber powders, even when filled with needle-like fiber powders such as glass wool cut, An object of the present invention is to provide a biaxially stretched polybutylene terephthalate film with little decrease in strength even when used for a long period of time, and a vacuum heat insulating material exterior material using the same.
- the present invention includes at least a base material layer and a sealant layer, wherein the base material layer has the following characteristics (a) to (c) and is a biaxially stretched polybutylene terephthalate film having a thickness of 10 to 30 ⁇ m. And (b) 60 to 90% by weight of the polybutylene terephthalate resin (A) and 10 to 40% by weight of the polyester resin (B) other than the polybutylene terephthalate resin (A). (B) The intrinsic viscosity of the film is 0.81 dl / g or more. (C) The puncture strength is 0.5 N / ⁇ m or more.
- the polyester resin (B) other than the polybutylene terephthalate resin (A) is polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), polypropylene terephthalate (PPT), Polybutylene terephthalate (PBT) in which at least one dicarboxylic acid selected from the group consisting of isophthalic acid, orthophthalic acid, naphthalenedicarboxylic acid, biphenyldicarboxylic acid, cyclohexanedicarboxylic acid, adipic acid, azelaic acid, and sebacic acid is copolymerized ) Resins, ethylene glycol, 1,3-propylene glycol, 1,2-propylene glycol, neopentyl glycol, 1,5-pentanediol, 1,6-hexanediol, die A polybutylene terephthalate (PBT) resin in which at least
- a laminate for a vacuum heat insulating material in which an inorganic thin film layer is laminated on the biaxially stretched polybutylene terephthalate film is suitable.
- the present inventors can suppress the occurrence of pinholes due to piercing of these needle-like short fiber powders even when filled with needle-like fiber powders such as glass wool cut, and have been used for a long time.
- the polyester thermoplastic resin composition used for the base material layer of the present invention mainly comprises a polybutylene terephthalate (PBT) resin (A), and the content of the polybutylene terephthalate (PBT) resin (A).
- PBT polybutylene terephthalate
- A the content of the polybutylene terephthalate resin
- the polybutylene terephthalate (PBT) resin (A) used as the main constituent component is preferably 90 mol% or more, more preferably 95 mol% or more, and still more preferably 98 mol as the dicarboxylic acid component. % Or more, and most preferably 100 mol%.
- 1,4-butanediol is preferably 90 mol% or more, more preferably 95 mol% or more, still more preferably 97 mol% or more, and most preferably 1,4-butane during polymerization. Except for the by-product produced by the ether bond of the diol, it is not included.
- the polyester thermoplastic resin composition used for the base material layer of the present invention is a polyester resin other than polybutylene terephthalate (PBT) resin for the purpose of adjusting film forming properties when biaxial stretching and mechanical properties of the obtained film. (B) can be contained.
- PBT polybutylene terephthalate
- polyester resin (B) other than polybutylene terephthalate (PBT) resin in addition to polyester resin such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), polypropylene terephthalate (PPT), PBT resins copolymerized with dicarboxylic acids such as isophthalic acid, orthophthalic acid, naphthalenedicarboxylic acid, biphenyldicarboxylic acid, cyclohexanedicarboxylic acid, adipic acid, azelaic acid, sebacic acid, ethylene glycol, 1,3-propylene glycol, 1 , 2-propylene glycol, neopentyl glycol, 1,5-pentanediol, 1,6-hexanediol, diethylene glycol, cyclohexanediol, polyethylene glycol PBT resin copolymerized with diol components such as polyethylene
- the lower limit of the intrinsic viscosity of the polybutylene terephthalate (PBT) resin (A) used for the base material layer of the present invention is preferably 0.8 dl / g, more preferably 0.95 dl / g, still more preferably 1. 0 dl / g.
- the intrinsic viscosity of the raw material polybutylene terephthalate (PBT) resin (A) is less than 0.9 dl / g, the intrinsic viscosity of the film obtained by film formation is reduced, and impact strength and puncture resistance are reduced. May be.
- the upper limit of the intrinsic viscosity of the polybutylene terephthalate (PBT) resin (A) resin is preferably 1.3 dl / g.
- the upper limit of the amount of the polyester resin (B) other than the polybutylene terephthalate (PBT) resin (A) is preferably 40% by mass or less, more preferably 35% by mass or less, and particularly preferably 15% by mass or less. .
- the addition amount of the polyester resin other than the polybutylene terephthalate (PBT) resin exceeds 40% by mass, the mechanical properties as the polybutylene terephthalate (PBT) resin are impaired, and the impact strength and the puncture resistance become insufficient. Transparency and barrier properties may decrease.
- the lower limit of the melting temperature of the polyester-based thermoplastic resin composition is preferably 200 ° C., and if it is lower than 200 ° C., ejection may become unstable.
- the upper limit of the resin melting temperature is preferably 300 ° C., and if it exceeds 300 ° C., the PBT resin may be deteriorated.
- the polyester-based thermoplastic resin composition may contain conventionally known additives such as a lubricant, a stabilizer, a colorant, an antioxidant, an antistatic agent, and an ultraviolet absorber as necessary.
- lubricant type in addition to inorganic lubricants such as silica, calcium carbonate, and alumina, organic lubricants are preferable, silica and calcium carbonate are more preferable, and silica is particularly preferable in terms of reducing haze. By these, transparency and slipperiness can be expressed.
- the lower limit of the lubricant concentration in the polyester-based thermoplastic resin composition is preferably 100 ppm, and if it is less than 100 ppm, the slipping property may be lowered.
- the upper limit of the lubricant concentration is preferably 20000 ppm, and if it exceeds 20000 ppm, the transparency may be lowered.
- the lower limit of the intrinsic viscosity of the biaxially stretched polybutylene terephthalate film used for the base material layer of the present invention is preferably 0.80 dl / g, more preferably 0.85 dl / g, and even more preferably 0.90 dl. / G, particularly preferably 0.95 dl / g. If it exceeds the above, impact strength, puncture resistance and the like are improved. Moreover, the barrier property after bending is also good.
- the upper limit of the intrinsic viscosity of the biaxially stretched polybutylene terephthalate film is preferably 1.2 dl / g, more preferably 1.1 dl / g. When the above is exceeded, the stress at the time of extending
- the lower limit of the intrinsic viscosity of the biaxially stretched polybutylene terephthalate film used for the base material layer of the present invention is preferably 0.8, more preferably 0.85, even more preferably 0.9, especially Preferably, and most preferably. If it is less than the above, impact strength, puncture resistance and the like may decrease.
- the upper limit of the intrinsic viscosity of the film is preferably 1.2. When the above is exceeded, the stress at the time of extending
- the biaxially stretched polybutylene terephthalate film used for the base material layer of the present invention preferably has a resin having the same composition throughout the film.
- a layer of another material may be laminated on the film used for the base material layer of the present invention, and as a method thereof, the film used for the base material layer of the present invention is bonded after creation or during film formation. Can be pasted together.
- the lower limit of the piercing strength (N / ⁇ m) of the biaxially stretched polybutylene terephthalate film used for the base material layer of the present invention is preferably 0.5, more preferably 0.7, and further preferably 0. .8. When it is less than the above, the strength may be insufficient when used as an outer packaging bag for a vacuum heat insulating material.
- the upper limit of the piercing strength (J / ⁇ m) of the biaxially stretched polybutylene terephthalate film used for the base material layer is preferably 1.5. If the above is exceeded, the improvement effect may become saturated.
- the biaxially stretched polybutylene terephthalate film piercing strength used for the base material layer can be controlled by MD magnification, heat setting temperature, and multilayering.
- the lower limit of the impact strength, J / ⁇ m, of the biaxially stretched polybutylene terephthalate film used for the base material layer of the present invention is preferably 0.055, more preferably 0.060, and even more preferably 0.065. It is. If it is less than the above, the strength may be insufficient when used as a bag.
- the upper limit of the impact strength, J / ⁇ m, of the biaxially stretched polybutylene terephthalate film used for the base material layer is preferably 0.2. If the above is exceeded, the improvement effect may become saturated.
- the upper limit of the haze (% / ⁇ m) per thickness of the biaxially stretched polybutylene terephthalate film used for the base material layer of the present invention is preferably 0.35%, more preferably 0.33%, Preferably it is 0.31%.
- a degree of the haze (% / ⁇ m) per thickness of the biaxially stretched polybutylene terephthalate film used for the base material layer of the present invention is preferably 0.35%, more preferably 0.33%, Preferably it is 0.31%.
- the lower limit of the thermal contraction rate (%) in the longitudinal direction and the width direction of the biaxially stretched polybutylene terephthalate film of the present invention is preferably 0. If it is less than the above, the improvement effect is saturated, and it may become mechanically brittle.
- the upper limit of the heat shrinkage rate (%) in the longitudinal direction and the width direction of the film used for the base material layer of the present invention is preferably 4.0, more preferably 3.5, and even more preferably 3 .0. If the above is exceeded, pitch deviation may occur due to dimensional changes during processing such as printing. Moreover, the barrier property after bending tends to decrease.
- the lower limit of the thickness of the biaxially stretched polybutylene terephthalate film used for the base material layer of the present invention is preferably 3 ⁇ m, more preferably 5 ⁇ m, and even more preferably 8 ⁇ m. If it is less than 3 ⁇ m, the strength as a film may be insufficient.
- the upper limit of the thickness of the biaxially stretched polybutylene terephthalate film used for the base material layer is preferably 100 ⁇ m, more preferably 75 ⁇ m, and further preferably 50 ⁇ m. If it exceeds 100 ⁇ m, it may become too thick and processing for the purpose of the present invention may be difficult.
- the method for producing a biaxially stretched polybutylene terephthalate film used for the base material layer of the present invention is specifically a step of melting a thermoplastic resin composition containing 60% by weight or more of a polybutylene terephthalate resin to form a molten fluid.
- the laminated fluid formed in (1) is formed from the molten fluid formed in step (2), and the laminated fluid formed in (2) is discharged from a die and brought into contact with a cooling roll to solidify to form a laminated body.
- Step (3) and biaxially stretching the laminate (4).
- Another step may be inserted between step (1) and step (2), step (2) and step (3).
- a filtration process, a temperature change process, etc. may be inserted between the process (1) and the process (2).
- a temperature changing process, a charge adding process, and the like may be inserted between the process (2) and the process (3).
- the method of melting the thermoplastic resin to form a molten fluid is not particularly limited, but a preferable method is a method of heating and melting using a single screw extruder or a twin screw extruder. it can.
- the method for forming the laminated fluid in the step (2) is not particularly limited, but a static mixer and / or a multilayer feed block is more preferable from the viewpoints of facility simplicity and maintainability. Further, in view of uniformity in the sheet width direction, those having a rectangular melt line are more preferable. It is further preferred to use a static mixer or multilayer feed block with a rectangular melt line. In addition, you may let the resin composition which consists of several layers formed by making a several resin composition merge pass in any 1 type, or 2 or more types of a static mixer, a multilayer feed block, and a multilayer manifold.
- the theoretical number of layers in step (2) needs to be 60 or more.
- the lower limit of the theoretical number of layers is preferably 200, more preferably 500. If the number of theoretical layers is too small, or the distance between layer interfaces becomes long and the crystal size becomes too large, the effects of the present invention tend not to be obtained. In addition, the degree of crystallinity in the vicinity of both ends of the sheet increases, the film formation becomes unstable, and transparency after molding may decrease.
- the upper limit of the theoretical number of layers in step (2) is not particularly limited, but is preferably 100,000, more preferably 10,000, and still more preferably 7,000. Even if the theoretical number of layers is extremely increased, the effect may be saturated.
- the number of theoretical laminations can be adjusted by selecting the number of elements of the static mixer.
- the static mixer is generally known as a static mixer (line mixer) having no drive unit, and the fluid entering the mixer is sequentially stirred and mixed by the elements.
- a typical static mixer element has a structure in which a rectangular plate is twisted 180 degrees, and depending on the direction of twisting, there are a right element and a left element, and the dimensions of each element are 1.5 times the diameter. Based on.
- the static mixer that can be used in the present invention is not limited to this.
- the theoretical number of laminations can be adjusted by selecting the number of divisions / laminates of the multilayer feed block.
- Multiple multilayer feed blocks can be installed in series.
- step (3) the laminated fluid is discharged from a die and brought into contact with a cooling roll to be solidified.
- the lower limit of the die temperature is preferably 200 ° C. If it is less than the above, the discharge may not be stable and the thickness may be non-uniform.
- the upper limit of the die temperature is preferably 320 ° C., and if it exceeds the above, the thickness becomes non-uniform, the resin deteriorates, and the appearance may be poor due to die lip contamination. More preferably, it is 300 degrees C or less, More preferably, it is 280 degrees C or less.
- the lower limit of the cooling roll temperature is preferably 0 ° C. If it is less than the above, the effect of suppressing crystallization may be saturated.
- the upper limit of the cooling roll temperature is preferably 25 ° C., and if it exceeds the above, the crystallinity becomes too high and stretching may be difficult. More preferably, it is 20 degrees C or less. Further, when the temperature of the cooling roll is in the above range, it is preferable to reduce the humidity of the environment near the cooling roll in order to prevent condensation.
- the thickness of the unstretched sheet is preferably in the range of 15 to 2500 ⁇ m. More preferably, it is 500 micrometers or less, More preferably, it is 300 micrometers or less.
- the casting in the multilayer structure described above is performed with at least 60 layers, preferably 250 layers or more, more preferably 1000 layers or more.
- the number of layers is small, the spherulite size of the unstretched sheet is increased, and the effect of reducing the yield stress of the obtained biaxially stretched film is lost as well as the effect of improving the stretchability is small.
- the stretching method can be simultaneous biaxial stretching or sequential biaxial stretching, but in order to increase the piercing strength, it is necessary to increase the plane orientation coefficient, and in that respect, sequential biaxial stretching is preferable.
- the lower limit of the machine direction (hereinafter referred to as MD) stretching temperature is preferably 55 ° C, more preferably 60 ° C.
- the upper limit of the MD stretching temperature is preferably 100 ° C, more preferably 95 ° C. If the temperature exceeds 100 ° C., the orientation is not applied and the mechanical properties may be deteriorated.
- a PET resin as a resin other than the PBT resin, it is preferable to raise the temperature as compared with the case of using the PBT resin alone.
- the lower limit of the MD draw ratio is preferably 2.6 times, more preferably 2.8 times, and even more preferably 3.0 times. If it is less than the above, the orientation is not applied, so the mechanical properties and thickness unevenness may be deteriorated.
- the upper limit of the MD draw ratio is preferably 4.3 times, more preferably 4.0 times, and particularly preferably 3.8 times. If the above is exceeded, the effect of improving the mechanical strength and thickness unevenness may be saturated, and the vertical orientation will become stronger. Distortion increases, and as a result, the mechanical strength may be uneven in the width direction.
- the lower limit of the transverse direction (hereinafter referred to as TD) stretching temperature is preferably 60 ° C, more preferably 70 ° C, and further preferably 80 ° C. If it is less than the above, breakage may easily occur.
- the upper limit of the TD stretching temperature is preferably 100 ° C., and if it exceeds the above, since the orientation is not applied, the mechanical properties may be deteriorated.
- a PET resin is used as a resin other than the PBT resin, it is preferably higher than that of the PBT resin alone.
- the lower limit of the TD stretching ratio is preferably 3.5 times, more preferably 3.6 times, still more preferably 3.7 times, and particularly preferably 4.0 times. If it is less than the above, the orientation is not applied, so the mechanical properties and thickness unevenness may be deteriorated.
- the upper limit of the TD stretch ratio is preferably 5 times, more preferably 4.5 times. If the above is exceeded, the effect of improving mechanical strength and thickness unevenness may be saturated.
- the lower limit of the heat setting temperature is preferably 200 ° C, more preferably 205 ° C. If it is less than the above, the thermal shrinkage rate increases, and displacement or shrinkage during processing may occur.
- the upper limit of the heat setting temperature is preferably 250 ° C, more preferably 230 ° C. If the above is exceeded, the film will melt, and even if it does not melt, it may become brittle.
- the lower limit of the TD relaxation (relaxation) rate is preferably 0.5%, more preferably 2%, and even more preferably 3%. If it is less than the above, breakage may easily occur during heat setting.
- the upper limit of the TD relaxation (relaxation) rate is preferably 6%, more preferably 5%. If it exceeds the above, sagging may occur and thickness unevenness may occur, and as a result of increased shrinkage in the longitudinal direction during heat setting, the distortion of molecular orientation at the end increases, and the mechanical strength increases in the width direction. May be non-uniform.
- the time for heat setting and TD relaxation (relaxation) is preferably 0.5 seconds or more.
- a metal such as an aluminum foil is formed between the biaxially stretched polybutylene terephthalate film as the base material layer and the sealant layer.
- excellent gas barrier properties can be imparted by forming a laminated film in which a gas barrier layer is provided on at least one side of a biaxially stretched polybutylene terephthalate film.
- the inorganic thin film layer is a thin film made of metal or an inorganic oxide or a coating layer made of a barrier resin such as polyvinylidene chloride.
- the inorganic thin film layer is preferably a thin film made of a metal or an inorganic oxide.
- the material for forming the inorganic thin film layer is not particularly limited as long as it can be formed into a thin film, but from the viewpoint of gas barrier properties, inorganic oxidation such as silicon oxide (silica), aluminum oxide (alumina), a mixture of silicon oxide and aluminum oxide, etc.
- a composite oxide of silicon oxide and aluminum oxide is preferable from the viewpoint that both flexibility and denseness of the thin film layer can be achieved.
- the mixing ratio of silicon oxide and aluminum oxide is preferably such that Al is in the range of 20 to 70% by mass ratio of metal. If the Al concentration is less than 20%, the water vapor barrier property may be lowered. On the other hand, if it exceeds 70%, the inorganic thin film layer tends to be hard, and the film may be broken during the secondary processing such as printing or laminating, and the barrier property may be lowered.
- silicon oxide is various silicon oxides such as SiO and SiO 2 or a mixture thereof
- aluminum oxide is various aluminum oxides such as AlO and Al 2 O 3 or a mixture thereof.
- the film thickness of the inorganic thin film layer is usually 1 to 800 nm, preferably 5 to 500 nm. If the film thickness of the inorganic thin film layer is less than 1 nm, satisfactory gas barrier properties may be difficult to obtain. On the other hand, even if the thickness exceeds 800 nm, the corresponding gas barrier property improvement effect is obtained. However, it is disadvantageous in terms of bending resistance and manufacturing cost.
- the method for forming the inorganic thin film layer is not particularly limited.
- a known vapor deposition method such as a vacuum vapor deposition method, a sputtering method, a physical vapor deposition method such as an ion plating method (PVD method), or a chemical vapor deposition method (CVD method).
- PVD method physical vapor deposition method
- CVD method chemical vapor deposition method
- a typical method for forming the inorganic thin film layer will be described by taking a silicon oxide / aluminum oxide thin film as an example.
- a vacuum deposition method a mixture of SiO 2 and Al 2 O 3 or a mixture of SiO 2 and Al is preferably used as a deposition material.
- particles are used as these vapor deposition materials.
- the size of each particle is desirably such that the pressure during vapor deposition does not change, and the preferred particle diameter is 1 mm to 5 mm.
- heating methods such as resistance heating, high frequency induction heating, electron beam heating, and laser heating can be employed.
- reactive vapor deposition using oxygen, nitrogen, hydrogen, argon, carbon dioxide gas, water vapor or the like as a reactive gas, or using means such as ozone addition or ion assist.
- the film forming conditions can be arbitrarily changed, for example, by applying a bias to the deposition target (laminated film to be deposited) or heating or cooling the deposition target.
- a bias to the deposition target (laminated film to be deposited) or heating or cooling the deposition target.
- Such a vapor deposition material, reaction gas, bias of the deposition target, heating / cooling, and the like can be similarly changed when a sputtering method or a CVD method is employed.
- the laminate for a vacuum heat insulating material of the present invention is used for applications that require cold insulation or heat insulation.
- the vacuum heat insulator include those in which a core material such as polyurethane foam is sealed in a vacuum state in an outer packaging material.
- the laminate for a vacuum heat insulating material of the present invention preferably includes a polyolefin layer that is a heat-sealable layer.
- the number of layers in the outer packaging material and the order of lamination are not particularly limited, but the innermost and outer layers are preferably heat-sealable layers (for example, polyolefin layers).
- the base material layer is a biaxially stretched polybutylene terephthalate film according to the present invention, for example, base material layer / PO layer, PET layer / base material layer / PO layer.
- Base layer / metal foil layer / PO layer and PET layer / base material layer / metal foil layer / PO layer are preferable, and an adhesive layer may be provided between the layers.
- the PO layer means a polyolefin layer
- the PET layer means polyethylene terephthalate.
- the vacuum insulation material according to the present invention uses the base material layer mainly composed of PBT, so that the strength of the vacuum insulation material itself is reduced even when used under a high temperature for a long time. It is suppressed and can have excellent durability.
- the strength of the vacuum insulation material specifically, the rate of decrease in the piercing strength after heating at 120 ° C. for 1000 hours with respect to the initial piercing strength before the durability test (under 25 ° C.) is 0% to It is preferably within a range of 30%, more preferably within a range of 0% to 20%, and particularly preferably within a range of 0% to 10%.
- the exterior material for vacuum heat insulating material has a sufficient heat insulating effect even if it is exposed for a long time at high temperature.
- Insulation for household appliances such as refrigerators, water heaters, rice cookers, etc .; insulation for homes used for walls, ceilings, attics, floors, etc .; vehicle roofing; insulation for vending machines, etc. It can be used for panels.
- Puncture strength reduction rate (%) 100 ⁇ (Puncture strength before durability test ⁇ Puncture strength after durability test) / (Puncture strength before durability test) Equation 1 ⁇ : Decrease rate of 30% or less ⁇ : Decrease rate of 31% to 49% ⁇ : Reduction rate of 50% or more
- the laminate laminate obtained above was cut into an A4 size, set in a dry oven, and subjected to a high temperature durability test in a 120 ° C. environment to evaluate the puncture strength over time.
- Puncture strength reduction rate (%) 100 ⁇ (Puncture strength before durability test ⁇ Puncture strength after durability test) / (Puncture strength before durability test) Equation 1 ⁇ : Decrease rate of 30% or less ⁇ : Decrease rate of 31% to 49% ⁇ : Reduction rate of 50% or more
- a resin containing 0.3% of amorphous silica of 1.5 ⁇ m was used.
- TPE-2 TPE-2; Example 6
- PTMG terephthalic acid / butanediol / polytetramethylene glycol
- a copolymerized polyethylene terephthalate resin was used.
- Example 1 After melted at 295 ° C., blended with polybutylene terephthalate (PBT), polyester resin PET-1 and inert particles such that silica particles with an average particle size of 2.4 ⁇ m were 1600 ppm using a single screw extruder.
- the melt line was introduced into a 12-element static mixer. Thereby, the melt of polybutylene terephthalate (PBT) was divided and laminated to obtain a multilayer melt made of the same raw material.
- the sheet was cast from a T-die at 270 ° C., and adhered to a cooling roll at 25 ° C. by an electrostatic adhesion method to obtain an unstretched sheet.
- the film was stretched 3.3 times in the machine direction at 70 ° C., then passed through a tenter and stretched 4.2 times in the transverse direction at 90 ° C., and subjected to tension heat fixation treatment at 210 ° C. for 3 seconds and 5% for 1 second.
- the gripping portions at both ends were cut and removed 10% at a time to obtain a mill roll of a biaxially stretched polybutylene terephthalate film having a thickness of 12 ⁇ m.
- Table 1 shows the film forming conditions, physical properties, and evaluation results of the obtained film.
- Example 1 it carried out like Example 1 except having changed the raw material composition and the film forming conditions into the biaxially stretched film described in Table 1.
- Table 1 shows the film forming conditions, physical properties, and evaluation results of the obtained film.
- Example 1 it carried out like Example 1 except having changed the raw material composition and the film forming conditions into the biaxially stretched film described in Table 1.
- Table 2 shows the film forming conditions, physical properties, and evaluation results of the obtained film.
- Table 1 shows the physical properties and evaluation results of commercially available polyethylene terephthalate film (Toyobo Co., Ltd., E5100) and polyamide film (Toyobo Co., Ltd., N1100).
- the biaxially stretched polybutylene terephthalate films and laminates (Examples 1 to 6) obtained by the present invention showed excellent puncture strength and durability test at 120 ° C. for 1000 hours. Later, high puncture strength was maintained.
- Comparative Example 1 since the content of the PET resin was large, the durability was excellent, but the initial puncture strength was low. In Comparative Example 2, since the content of the CHDM copolymerized polyethylene terephthalate resin added as a polyester resin other than polybutylene terephthalate (PBT) was large, the initial puncture strength was low and the durability was also lowered. Furthermore, in Comparative Example 3, since the draw ratio at the time of film stretching was low, the degree of plane orientation was low, and the puncture strength was insufficient.
- PBT polybutylene terephthalate
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Abstract
Description
また、真空断熱材の断熱性能を長期間維持するためには、外包材の内部を長期にわたり高い真空状態に保持する必要がある。そのため、外包材には、外部からガスが透過することを防止するためのガスバリア性、芯材を覆って密着封止するための熱接着性等の種々の機能が要求される。
したがって、上記外包材は、これらの各機能特性を有する複数のフィルムを有する積層体として構成されるものとなる。一般的な外包材の態様としては、熱溶着層、ガスバリア層および保護層が積層されてなるものであり、各層間は接着剤等を介して貼り合されている。
しかし、かかる従来技術においてはナイロンフィルムは長期耐熱試験によって劣化し、強度が低下してしまうという問題点があった。
当該技術ではPET樹脂を用いているため、耐久性には優れるものの、PET樹脂だけでは突刺し強度を充分に上げることができず、突刺し強度をさらに向上するには検討の余地があった。
例えば特許文献4では、延伸倍率を3.5倍以下として横方向(TD)に延伸した後、100000%/min以上の変形速度でMD方向に延伸して二軸延伸ポリブチレンテレフタレート(PBT)フィルムを製造することにより、均一に延伸された厚みムラのないフィルムを製造するという技術が知られていた。しかし、かかる従来技術は実施例の結果からも分かるように、MD方向の変形速度のみを大きくすることから伸度が低く、縦方向(MD)と横方向(TD)方向でバランスの取れたフィルムとならないという問題点があった。
(a)ポリブチレンテレフタレート樹脂(A)を60~90重量%、ポリブチレンテレフタレート樹脂(A)以外のポリエステル樹脂(B)を10~40重量%含有する。
(b)フィルムの固有粘度が0.81dl/g以上である。
(c)突刺し強度が0.5N/μm以上である。
本発明の基材層に用いられるポリエステル熱可塑性樹脂組成物は、ポリブチレンテレフタレート(PBT)樹脂(A)を主たる構成成分とするものであり、ポリブチレンテレフタレート(PBT)樹脂(A)の含有率は60質量%以上が好ましく、75質量%以上が好ましく、さらには85質量%以上が好ましい。60質量%未満であるとインパクト強度や耐突き刺し性が低下してしまい、フィルム特性としては十分なものでなくなってしまう。
主たる構成成分として用いるポリブチレンテレフタレート(PBT)樹脂(A)は、ジカルボン酸成分として、テレフタル酸が90モル%以上であることが好ましく、より好ましくは95モル%以上であり、さらに好ましくは98モル%以上であり最も好ましくは100モル%である。グリコール成分として1,4-ブタンジオールが90モル%以上であることが好ましく、より好ましくは95モル%以上であり、さらに好ましくは97モル%以上であり、最も好ましくは重合時に1,4-ブタンジオールのエーテル結合により生成する副生物以外は含まれないことである。
ポリブチレンテレフタレート(PBT)樹脂以外のポリエステル樹脂(B)としては、ポリエチレンテレフタレート(PET)、ポリエチレンナフタレート(PEN)、ポリブチレンナフタレート(PBN)、ポリプロピレンテレフタレート(PPT)などのポリエステル樹脂のほか、イソフタル酸、オルソフタル酸、ナフタレンジカルボン酸、ビフェニルジカルボン酸、シクロヘキサンジカルボン酸、アジピン酸、アゼライン酸、セバシン酸などのジカルボン酸が共重合されたPBT樹脂や、エチレングリコール、1,3-プロピレングリコール、1,2-プロピレングリコール、ネオペンチルグリコール、1,5-ペンタンジオール、1,6-ヘキサンジオール、ジエチレングリコール、シクロヘキサンジオール、ポリエチレングリコール、ポリテトラメチレングリコール、ポリカーボネートジオール等のジオール成分が共重合されたPBT樹脂、若しくはイソフタル酸、オルソフタル酸、ナフタレンジカルボン酸、ビフェニルジカルボン酸、シクロヘキサンジカルボン酸、アジピン酸、アゼライン酸、及びセバシン酸からなる群から選ばれる少なくとも1種以上のジカルボン酸が共重合されたポリエチレンテレフタレート(PET)樹脂や、1,3-ブタンジオール、1,3-プロピレングリコール、1,2-プロピレングリコール、ネオペンチルグリコール、1,5-ペンタンジオール、1,6-ヘキサンジオール、ジエチレングリコール、シクロヘキサンジオール、ポリエチレングリコール、ポリテトラメチレングリコール、及びポリカーボネートジオールからなる群から選ばれる少なくとも1種以上のジオール成分が共重合されたポリエチレンテレフタレート(PET)樹脂が挙げられる。
原料であるポリブチレンテレフタレート(PBT)樹脂(A)の固有粘度が0.9dl/g未満の場合、製膜して得られるフィルムの固有粘度が低下し、インパクト強度や耐突き刺し性などが低下するとなることがある。
ポリブチレンテレフタレート(PBT)樹脂(A)樹脂の固有粘度の上限は好ましくは1.3dl/gである。上記を越えると延伸時の応力が高くなりすぎ、製膜性が悪化するとなることがある。
二軸延伸ポリブチレンテレフタレートフィルムの固有粘度の上限は好ましくは1.2dl/gであり、さらに好ましくは1.1dl/gである。上記を超えると延伸時の応力が高くなりすぎず、製膜性が良好になる。
また、本発明の基材層に使用されるフィルムに他素材の層を積層して良く、その方法として、本発明の基材層に使用されるフィルムを作成後に貼り合わせるか、製膜中に貼り合わせることできる。
基材層に使用される二軸延伸ポリブチレンテレフタレートフィルム突刺し強度はMD倍率、熱固定温度、多層化により制御できる。
上記を超えると二軸延伸ポリブチレンテレフタレートフィルムに印刷を施した際に、印刷された文字や画像の品位を損ねる可能性がある。
基材層に使用される二軸延伸ポリブチレンテレフタレートフィルムの厚みの上限は好ましくは100μmであり、より好ましくは75μmであり、さらに好ましくは50μmである。100μmを越えると厚くなりすぎて本発明の目的における加工が困難となることがある。
本発明の基材層に使用されるフィルムを得るための好適な方法のとして、キャスト時に同一の組成の原料を多層化してキャストすることが挙げられる。
PBT樹脂は結晶化速度が速いため、キャスト時にも結晶化が進行する。このとき、多層化せずに単層でキャストした場合には、結晶の成長を抑制しうるような障壁が存在しないために、これらの結晶はサイズの大きな球晶へと成長してしまう。その結果、得られた未延伸シートの降伏応力が高くなり、二軸延伸時に破断しやすくなるばかりでなく、得られた二軸延伸フィルムの柔軟性が損なわれ、インパクト強度や耐突き刺し性が不十分なフィルムとなってしまう。
一方で本発明者らは同一の樹脂を多層積層することで、未延伸シートの延伸応力を低減でき、安定した二軸延伸が可能となることを見出した。
工程(1)と工程(2)、工程(2)と工程(3)の間には、他の工程が挿入されていても差し支えない。例えば、工程(1)と工程(2)の間には濾過工程、温度変更工程等が挿入されていても良い。また、工程(2)と工程(3)の間には、温度変更工程、電荷付加工程等が挿入されていても良い。但し、工程(2)と工程(3)の間には、工程(2)で形成された積層構造を破壊する工程があってはならない。
このとき、未延伸シートの厚みは15~2500μmの範囲が好適である。より好ましくは500μm以下であり、さらに好ましくは300μm以下である。
PBT樹脂以外の樹脂としてPET樹脂を使用するときは、PBT樹脂単独の場合よりも温度を高くすることが好ましい。
熱固定及びTD緩和(リラックス)の時間は0.5秒以上が好ましい。
本発明の基材層に使用される二軸延伸ポリブチレンテレフタレートフィルムに積層するガスバリア層としては、無機薄膜層は金属または無機酸化物からなる薄膜又はポリ塩化ビニリデン等のバリア樹脂からなるコーティング層が好ましく用いられる。
ガスバリア層の中でも無機薄膜層は金属または無機酸化物からなる薄膜であることが好ましい。無機薄膜層を形成する材料は、薄膜にできるものなら特に制限はないが、ガスバリア性の観点から、酸化ケイ素(シリカ)、酸化アルミニウム(アルミナ)、酸化ケイ素と酸化アルミニウムとの混合物等の無機酸化物が好ましく挙げられる。特に、薄膜層の柔軟性と緻密性を両立できる点からは、酸化ケイ素と酸化アルミニウムとの複合酸化物が好ましい。この複合酸化物において、酸化ケイ素と酸化アルミニウムとの混合比は、金属分の質量比でAlが20~70%の範囲であることが好ましい。
Al濃度が20%未満であると、水蒸気バリア性が低くなる場合がある。一方、70%を超えると、無機薄膜層が硬くなる傾向があり、印刷やラミネートといった二次加工の際に膜が破壊されてバリア性が低下する虞がある。なお、ここでいう酸化ケイ素とはSiOやSiO2等の各種珪素酸化物又はそれらの混合物であり、酸化アルミニウムとは、AlOやAl2O3等の各種アルミニウム酸化物又はそれらの混合物である。
これら蒸着原料としては通常粒子が用いられるが、その際、各粒子の大きさは蒸着時の圧力が変化しない程度の大きさであることが望ましく、好ましい粒子径は1mm~5mmである。
加熱には、抵抗加熱、高周波誘導加熱、電子ビーム加熱、レーザー加熱などの方式を採用することができる。また、反応ガスとして酸素、窒素、水素、アルゴン、炭酸ガス、水蒸気等を導入したり、オゾン添加、イオンアシスト等の手段を用いた反応性蒸着を採用することも可能である。
さらに、被蒸着体(蒸着に供する積層フィルム)にバイアスを印加したり、被蒸着体を加熱もしくは冷却するなど、成膜条件も任意に変更することができる。このような蒸着材料、反応ガス、被蒸着体のバイアス、加熱・冷却などは、スパッタリング法やCVD法を採用する場合にも同様に変更可能である。
本願発明の真空断熱材用積層体は、保冷や保温が必要な用途に使用されるものである。当該真空断熱体としては、例えば外包材内にポリウレタンフォーム等の芯材が真空状態で封入されるものが挙げられる。
本願発明の真空断熱材用積層体は、ヒートシール可能な層であるポリオレフィン層を備えることが好ましい。外包材における層数及び積層順には特に制限はないが、最内外層がヒートシール可能な層(例えばポリオレフィン層)とされることが好ましい。
本願発明の真空断熱材用積層体の層構成としては、基材層を本発明にかかる二軸延伸ポリブチレンテレフタレートフィルムとして、例えば、基材層/PO層、PET層/基材層/PO層、基材層/金属箔層/PO層、PET層/基材層/金属箔層/PO層が好ましく、層間に接着層を設けてもよい。
ここで、PO層はポリオレフィン層を、PET層はポリエチレンテレフタレートを意味する。
上記真空断熱材用外装材の強度として、具体的には、耐久性試験前(25℃下)の初期突刺し強度に対する、120℃×1000時間加熱後の突刺し強度の低下率が0%~30%の範囲内であることが好ましく、中でも0%~20%の範囲内であることが好ましく、特に0%~10%の範囲内であることが好ましい。所定の条件下における基材層の耐久試験後の突刺し強度低下率が上述の範囲内であることにより、真空断熱材用外装材は、高温下で長期間曝されても十分な断熱効果を保持できることから、冷蔵庫、給湯設備、炊飯器等の家電製品用の断熱材;壁部、天井部、屋根裏部、床部等に用いられる住宅用断熱材;車両屋根材;自動販売機等の断熱パネルなどに利用できる。
JIS-Z-1702準拠の方法で測定した。
JIS K 7367-5に準拠し、溶媒としてフェノール(60質量%)と1,1,2,2-テトラクロロエタン(40質量%)の混合溶媒を用い、30℃で測定した。
食品衛生法における「食品、添加物等の規格基準 第3:器具及び容器包装」(昭和57年厚生省告示第20号)の「2.強度等試験法」に準拠して測定した。
先端部直径0.7mmの針を、突刺し速度50mm/分でフィルムに突き刺し、針がフィルムを貫通する際の強度を測定して、突き刺し強度とした。測定は常温(23℃)で行い、単位は[N/μm]である。
実施例および比較例で得られたフィルムを、A4サイズに切り取り評価サンプルとした。当該評価サンプルをドライオーブンにセットし、120℃環境下で高温耐久試験を行い、経時における突刺し強度を評価した。
具体的には、120℃×1000時間後の突刺し強度低下率を式1で算出し、下記の基準で評価した。
突刺し強度低下率(%)=100×(耐久性試験前の突刺強度-耐久性試験後の突刺強度)/(耐久性試験前の突刺し強度) 式1
○:低下率30%以下
△:低下率31%~49%
×:低下率50%以上
実施例および比較例で得られたフィルムを基材層とし、ウレタン系2液硬化型接着剤(三井化学社製「タケラック(登録商標)A525S」と「タケネート(登録商標)A50」を13.5:1(質量比)の割合で配合)を用いてドライラミネート法により、ヒートシール性樹脂層として厚さ70μmの無延伸ポリプロピレンフィルム(東洋紡株式会社製「P1147」)を貼り合わせ、40℃にて4日間エージングを施すことにより、評価用のラミネート積層体を得た。なお、ウレタン系2液硬化型接着剤で形成される接着剤層の乾燥後の厚みはいずれも約4μmであった。
突刺し強度低下率(%)=100×(耐久性試験前の突刺強度-耐久性試験後の突刺強度)/(耐久性試験前の突刺し強度) 式1
○:低下率30%以下
△:低下率31%~49%
×:低下率50%以上
ポリブチレンテレフタレート(PBT):実施例1~6、比較例1~3)
後述する実施例1~6、比較例1~3のフィルム作製において、主原料であるポリブチレンテレフタレート(PBT)樹脂は1100-211XG(CHANG CHUN PLASTICS CO.,LTD.、固有粘度1.28dl/g)を用いた。
後述する実施例1、2、比較例1、3のフィルム作製において、テレフタル酸//エチレングリコール=100//100(モル%)からなる固有粘度0.62dl/gのポリエチレンテレフタレート樹脂に平均粒子径1.5μmの不定形シリカを0.3%含有する樹脂を用いた。
後述する実施例3のフィルム作製において、テレフタル酸/イソフタル酸//エチレングリコール=80/20//100(モル%)からなる固有粘度0.72dl/gのイソフタル酸共重合ポリエチレンテレフタレート樹脂を用いた。
後述する実施例4のフィルム作製において、テレフタル酸/エチレングリコール/ネオペンチルグリコール=100//70/30(モル%)からなる固有粘度0.75dl/gのネオペンチルグリコール共重合ポリエチレンテレフタレート樹脂を用いた。
後述する実施例5、比較例2のフィルム作製において、テレフタル酸/エチレングリコール/シクロヘキサンジメタノール(CHDM)=100//70/30(モル%)からなる固有粘度0.75dl/gのCHDM共重合ポリエチレンテレフタレート樹脂を用いた。
後述する実施例6のフィルム作製において、主原料であるポリテトラメチレングリコール共重合PET樹脂はテレフタル酸/ブタンジオール/ポリテトラメチレングリコール(PTMG)=100//85/15(モル%)からなるPTMG共重合ポリエチレンテレフタレート樹脂を用いた。
一軸押出機を用い、ポリブチレンテレフタレート(PBT)とポリエステル樹脂であるPET-1と不活性粒子として平均粒径2.4μmのシリカ粒子1600ppmとなるように配合したものを295℃で溶融させた後、メルトラインを12エレメントのスタティックミキサーに導入した。
これにより、ポリブチレンテレフタレート(PBT)の溶融体の分割・積層を行い、同一の原料からなる多層溶融体を得た。270℃のT-ダイスからキャストし、25℃の冷却ロールに静電密着法により密着させて未延伸シートを得た。次いで、70℃で縦方向に3.3倍ロール延伸し、次いで、テンターに通して90℃で横方向に4.2倍延伸し、210℃で3秒間の緊張熱固定処理と1秒間5%の緩和処理を実施した後、両端の把持部を10%ずつ切断除去して厚みが12μmの二軸延伸ポリブチレンテレフタレートフィルムのミルロールを得た。得られたフィルムの製膜条件、物性および評価結果を表1に示した。
実施例1において、原料組成、製膜条件を表1に記載した二軸延伸フィルムに変えた以外は実施例1と同様に行った。
得られたフィルムの製膜条件、物性および評価結果を表1に示した。
実施例1において、原料組成、製膜条件を表1に記載した二軸延伸フィルムに変えた以外は実施例1と同様に行った。
得られたフィルムの製膜条件、物性および評価結果を表2に示した。
市販のポリエチレンテレフタレートフィルム(東洋紡(株)製、E5100)及びポリアミドフィルム(東洋紡(株)製、N1100)を用いて、その物性および評価結果を表1に示した。
また、比較例2においては、ポリブチレンテレフタレート(PBT)以外のポリエステル樹脂として添加したCHDM共重合ポリエチレンテレフタレート樹脂の含有量が多いため、初期の突刺し強度が低く、耐久性も低下していた。さらに比較例3においては、フィルム延伸時の延伸倍率が低いため、面配向度が低く、突刺し強度が不十分であった。
た。
Claims (3)
- 少なくとも基材層とシーラント層を含み、基材層が下記(a)~(c)の特徴を有し、厚み10~30μmの二軸延伸ポリブチレンテレフタレートフィルムであることを特徴とする真空断熱材用積層体。
(a)ポリブチレンテレフタレート樹脂(A)を60~90重量%、ポリブチレンテレフタレート樹脂(A)以外のポリエステル樹脂(B)を10~40重量%含有する。
(b)フィルムの固有粘度が0.81以上である。
(c)突刺し強度が0.5N/μm以上である。 - ポリブチレンテレフタレート樹脂(A)以外のポリエステル樹脂(B)が、ポリエチレンテレフタレート(PET)、ポリエチレンナフタレート(PEN)、ポリブチレンナフタレート(PBN)、ポリプロピレンテレフタレート(PPT)のほか、イソフタル酸、オルソフタル酸、ナフタレンジカルボン酸、ビフェニルジカルボン酸、シクロヘキサンジカルボン酸、アジピン酸、アゼライン酸、及びセバシン酸からなる群から選ばれる少なくとも1種以上のジカルボン酸が共重合されたポリブチレンテレフタレート(PBT)樹脂や、エチレングリコール、1,3-プロピレングリコール、1,2-プロピレングリコール、ネオペンチルグリコール、1,5-ペンタンジオール、1,6-ヘキサンジオール、ジエチレングリコール、シクロヘキサンジオール、ポリエチレングリコール、ポリテトラメチレングリコール、及びポリカーボネートジオールからなる群から選ばれる少なくとも1種以上のジオール成分が共重合されたポリブチレンテレフタレート(PBT)樹脂、若しくはイソフタル酸、オルソフタル酸、ナフタレンジカルボン酸、ビフェニルジカルボン酸、シクロヘキサンジカルボン酸、アジピン酸、アゼライン酸、及びセバシン酸からなる群から選ばれる少なくとも1種以上のジカルボン酸が共重合されたポリエチレンテレフタレート(PET)樹脂や、1,3-ブタンジオール、1,3-プロピレングリコール、1,2-プロピレングリコール、ネオペンチルグリコール、1,5-ペンタンジオール、1,6-ヘキサンジオール、ジエチレングリコール、シクロヘキサンジオール、ポリエチレングリコール、ポリテトラメチレングリコール、及びポリカーボネートジオールからなる群から選ばれる少なくとも1種以上のジオール成分が共重合されたポリエチレンテレフタレート(PET)樹脂から選ばれる少なくとも1種の樹脂である請求項1に記載の真空断熱材用積層体。
- 前記二軸延伸ポリブチレンテレフタレートフィルムに無機薄膜層が積層された請求項1に記載の真空断熱材用積層体。
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| WO2025205684A1 (ja) * | 2024-03-25 | 2025-10-02 | 三菱ケミカル株式会社 | ポリエステルフィルム、及びその製造方法 |
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| WO2015072163A1 (ja) * | 2013-11-13 | 2015-05-21 | 東洋紡株式会社 | 二軸延伸ポリエステルフィルムおよびその製造方法 |
| WO2015178390A1 (ja) * | 2014-05-21 | 2015-11-26 | 東洋紡株式会社 | 二軸延伸ポリブチレンテレフタレートフィルムおよびその製造方法、並びにガスバリア性積層フィルム |
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| KR101773230B1 (ko) * | 2014-04-23 | 2017-09-13 | (주)엘지하우시스 | 진공단열재용 외피재 및 이를 포함하는 진공단열재 |
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2017
- 2017-03-27 US US16/087,075 patent/US20200326027A1/en not_active Abandoned
- 2017-03-27 EP EP17774869.6A patent/EP3437861A4/en not_active Withdrawn
- 2017-03-27 WO PCT/JP2017/012261 patent/WO2017170332A1/ja not_active Ceased
- 2017-03-27 CN CN201780021830.4A patent/CN109070571A/zh active Pending
- 2017-03-27 JP JP2018509309A patent/JP6885395B2/ja active Active
- 2017-03-27 KR KR1020187030854A patent/KR20180128454A/ko not_active Ceased
- 2017-03-29 TW TW106110528A patent/TW201806776A/zh unknown
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019187694A1 (ja) * | 2018-03-30 | 2019-10-03 | 東洋紡株式会社 | ポリエステルフィルムロール |
| JPWO2019187694A1 (ja) * | 2018-03-30 | 2020-10-22 | 東洋紡株式会社 | ポリエステルフィルムロール |
| CN110581237A (zh) * | 2018-06-08 | 2019-12-17 | 罗伯特·博世有限公司 | 具有多个电池单池的电池单元和这种电池单元的应用 |
| CN110581237B (zh) * | 2018-06-08 | 2024-11-26 | 罗伯特·博世有限公司 | 具有多个电池单池的电池单元和这种电池单元的应用 |
| WO2025205684A1 (ja) * | 2024-03-25 | 2025-10-02 | 三菱ケミカル株式会社 | ポリエステルフィルム、及びその製造方法 |
| WO2025205685A1 (ja) * | 2024-03-25 | 2025-10-02 | 三菱ケミカル株式会社 | ポリエステルフィルム、及びその製造方法 |
| JP2025170062A (ja) * | 2024-03-25 | 2025-11-14 | 三菱ケミカル株式会社 | ポリエステルフィルム、及びその製造方法 |
| JP2025170061A (ja) * | 2024-03-25 | 2025-11-14 | 三菱ケミカル株式会社 | ポリエステルフィルム、及びその製造方法 |
| JP2025183297A (ja) * | 2024-03-25 | 2025-12-16 | 三菱ケミカル株式会社 | ポリエステルフィルム、及びその製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20200326027A1 (en) | 2020-10-15 |
| TW201806776A (zh) | 2018-03-01 |
| JPWO2017170332A1 (ja) | 2019-02-14 |
| CN109070571A (zh) | 2018-12-21 |
| EP3437861A4 (en) | 2019-10-09 |
| EP3437861A1 (en) | 2019-02-06 |
| JP6885395B2 (ja) | 2021-06-16 |
| KR20180128454A (ko) | 2018-12-03 |
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