Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J201/00—Adhesives based on unspecified macromolecular compounds
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J201/00—Adhesives based on unspecified macromolecular compounds
  • C09J201/02—Adhesives based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
  • C09J201/04—Adhesives based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing halogen atoms
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J7/00—Adhesives in the form of films or foils
  • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
  • C09J7/21—Paper; Textile fabrics
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J7/00—Adhesives in the form of films or foils
  • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
  • C09J7/38—Pressure-sensitive adhesives [PSA]

Definitions

• the present invention relates to an adhesive laminate sheet.
• An adhesive sheet has been developed that is designed to be exposed to a hot environment.
• Patent Document 1 discloses a heat-resistant tape that includes a base layer and an adhesive layer, the base layer being a glass fiber fabric impregnated with a fluorine-containing resin, and a silicon-containing agent being present between the glass fiber fabric and the fluorine-containing resin.
• Patent Document 1 The adhesive tape in Patent Document 1 is said to provide a heat-resistant tape with high productivity, but no consideration is given to heat insulation properties.
• the present invention aims to provide an adhesive laminated sheet with excellent heat insulation and heat resistance.
• the present invention is as follows.
• the first aspect of the present invention is An adhesive laminated sheet in which an adhesive layer and a base layer are laminated in this order,
• the adhesive layer is made of an adhesive component
• the base layer includes a nonwoven fabric sheet made of fluororesin fibers
• the substrate layer is A mixed layer impregnated with the adhesive component and provided in a range of 2% to 50% of the thickness of the base layer from the adhesive layer side main surface of the base layer toward the other main surface; an air layer including air provided in a range of 50% to 98% of a thickness of the base material layer from the mixed layer toward the other main surface,
• the adhesive laminated sheet has a porosity of 25% or more,
• the adhesive component of the adhesive layer and the adhesive component of the mixed layer are integral with each other,
• the adhesive laminate sheet is characterized in that the change ratio ( A2 / A1 ) of the adhesive strength A2 of the adhesive layer after heating at 200°C for 300 hours to the adhesive strength A1 of the adhesive layer at 23°C and a humidity of 50% is 0.40 or
• the adhesive component is preferably a fluororesin adhesive component.
• a second aspect of the present invention is An adhesive laminated sheet in which an adhesive layer and a base layer are laminated in this order,
• the adhesive layer is made of an adhesive component that is a fluororesin-based adhesive component
• the base layer includes a nonwoven fabric sheet made of fluororesin fibers
• the substrate layer is A mixed layer impregnated with the adhesive component and provided in a range of 2% to 50% of the thickness of the base layer from the adhesive layer side main surface of the base layer toward the other main surface; an air layer including air provided in a range of 50% to 98% of a thickness of the base material layer from the mixed layer toward the other main surface,
• the adhesive laminated sheet has a porosity of 25% or more
• the adhesive laminate sheet is characterized in that the adhesive component of the adhesive layer and the adhesive component of the mixed layer are integrated.
• the double-sided pressure-sensitive adhesive laminate sheet of the first embodiment and the double-sided pressure-sensitive adhesive laminate sheet of the second embodiment preferably have the following configuration.
• the thermal conductivity is preferably 0.15 W/(K ⁇ m) or less. It is preferable that the rate of change (A 2 /A 1 ) of the adhesive strength A 2 of the adhesive layer after heating at 200° C. for 300 hours to the adhesive strength A 1 of the adhesive layer at 23° C. and a humidity of 50% is 0.40 or more.
• the fluororesin fiber is preferably at least PTFE, PFA or FEP.
• the thickness of the adhesive layer is preferably equal to or less than the thickness of the base layer.
• the thickness of the substrate layer is preferably 20 ⁇ m to 1000 ⁇ m.
• the thickness of the adhesive layer is preferably 5 ⁇ m to 1000 ⁇ m.
• the present invention provides an adhesive laminated sheet with excellent heat insulation and heat resistance.
• FIG. 1 is a schematic diagram of an adhesive laminate sheet.
• FIG. 2 is a diagram summarizing the relationship between porosity and thermal conductivity in each of the examples and comparative examples.
• the adhesive laminate sheet 10 according to the present invention will be described below mainly with reference to FIG. 1, but the present invention is not limited thereto.
• the adhesive laminated sheet 10 is an adhesive laminated sheet in which an adhesive layer 1 and a base layer A are laminated in this order.
• Another layer (e.g., a protective film, etc.) may be laminated on the surface of the adhesive laminate sheet 10.
• the adhesive layer 1 is made of an adhesive component.
• the adhesive layer 1 is composed of an adhesive component.
• the adhesive component is preferably a heat-resistant adhesive component.
• the adhesive layer 1 is preferably made of a heat-resistant adhesive component.
• the adhesive component constituting the adhesive laminate sheet 10 "has heat resistance" means that in the adhesive laminate sheet, the rate of change ( A2 / A1 ) of the adhesive strength A2 of the adhesive layer 1 after heating at 200°C for 300 hours to the adhesive strength A1 of the adhesive layer 1 at 23°C and a humidity of 50% satisfies 0.40 or more.
• the resin that is the main component of the adhesive component is not particularly limited.
• adhesive components include fluororesin-based adhesive components and silicone resin-based adhesive components.
• the adhesive component is preferably a fluororesin-based adhesive component, since it is easily compatible with the nonwoven fabric sheet composed of fluororesin fibers.
• fluororesins that make up the fluororesin-based adhesive component include copolymers containing fluorine-based monomers such as vinylidene fluoride, hexafluoropropylene, and tetrafluoroethylene.
• the adhesive component according to the present invention is a fluororesin-based adhesive component, it is possible to obtain an adhesive component that does not contain a silicone resin-based adhesive component (silicone-free), which is preferable because it can reduce environmental pollution and product defects caused by decomposition products.
• the adhesive component may contain other additives to the extent that they do not impair the effects of the present invention.
• other additives include fillers, antioxidants, heat stabilizers, light stabilizers, antistatic agents, flame retardants, plasticizers, tackifiers, pigments, etc.
• the content of other additives in the adhesive component is, for example, 10% by mass or less, 5% by mass or less, 1% by mass or less, etc., when the entire adhesive component is taken as 100% by mass.
• the thickness T1 of the adhesive layer 1 is not particularly limited, and is preferably 5 ⁇ m to 1000 ⁇ m, 7 ⁇ m to 500 ⁇ m, or 10 ⁇ m to 200 ⁇ m.
• the ratio (T 1 /T 10 ) of the thickness T 1 of the adhesive layer 1 to the total thickness T 10 of the adhesive laminate sheet 10 is preferably 0.01 or more, 0.02 or more, or 0.05 or more, and is preferably 0.50 or less, 0.45 or less, or 0.40 or less.
• the thickness T1 of the adhesive layer 1 is preferably equal to or less than the thickness TA of the base layer A.
• the ratio ( T1 / TA ) of the thickness T1 of the adhesive layer 1 to the thickness TA of the base layer A is preferably equal to or less than 1.00, equal to or less than 0.80, or equal to or less than 0.60.
• the lower limit of this ratio ( T1 / TA ) is not particularly limited, but is, for example, 0.01, 0.03, or 0.05.
• the base material layer A includes a nonwoven fabric sheet (not shown) made of fluororesin fibers, and has regions where the nonwoven fabric sheet is impregnated with an adhesive component and regions where the nonwoven fabric sheet is not impregnated with an adhesive component.
• the base material layer A has A mixed layer A1 is formed from the adhesive layer 1 side main surface S A1 (the main surface in contact with the adhesive layer 1) toward the other main surface S A2 and is a region impregnated with an adhesive component; an air layer A0 containing air formed from the mixed layer A1 toward the other main surface S A2 ; Includes.
• the nonwoven fabric sheet constituting the base layer A is porous.
• the adhesive component penetrates into the holes in the nonwoven fabric sheet, forming a mixed layer containing fibers and the adhesive component.
• the areas of the nonwoven fabric sheet that have not been penetrated by the adhesive component maintain the porous state inherent to the nonwoven fabric sheet, and an air layer containing air is formed.
• the base layer A includes a mixed layer and an air layer.
• the adhesive component constituting the adhesive layer 1 and the adhesive component constituting the mixed layer A1 are integrated (continuous). In this way, by forming a structure in which the adhesive component of the adhesive layer 1 and the adhesive component of the mixed layer A1 are integrated, it is possible to increase the adhesive strength between the adhesive layer and the base layer, etc.
• the nonwoven fabric sheet that constitutes the base layer A can be any conventionally known material.
• the fluororesin fibers constituting the nonwoven fabric sheet are not particularly limited, and examples include fibers made from polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), etc.
• PTFE polytetrafluoroethylene
• PVDF polyvinylidene fluoride
• PFA tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer
• FEP tetrafluoroethylene-hexafluoropropylene copolymer
• the fiber diameter and fiber length of the fluororesin fibers and the density of the nonwoven fabric sheet can be appropriately adjusted taking into consideration the porosity of the base layer A (or the porosity of the air layer A0), strength, ease of impregnation with the adhesive component, etc.
• the thickness T A of the base layer A is not particularly limited, and is preferably 20 ⁇ m to 1000 ⁇ m, 50 ⁇ m to 800 ⁇ m, or 100 ⁇ m to 500 ⁇ m.
• the air layer A0 is a layer formed by a nonwoven fabric sheet and in which air is held by the nonwoven fabric sheet.
• the air layer A0 usually contains air and a nonwoven fiber sheet.
• the air layer A0 is provided in the range of 50% to 98% of the thickness of the base layer A.
• the ratio of the thickness T A0 of the air layer A0 to the thickness T A of the base layer A ([T A0 /T A ] ⁇ 100) is 50% to 98%.
• [T A0 /T A ] ⁇ 100 is preferably 60% or more, 70% or more, or 80% or more, and is preferably 96% or less, 95% or less, or 94% or less.
• the thickness T A0 of the air layer A0 is not particularly limited, but is preferably 10 ⁇ m to 500 ⁇ m, 50 ⁇ m to 500 ⁇ m, or 100 ⁇ m to 500 ⁇ m.
• the nonwoven fabric sheet constituting the mixed layer A1 is the same as the nonwoven fabric sheet constituting the air layer A0, and therefore a description thereof will be omitted.
• the adhesive component that constitutes mixed layer A1 is the same as the adhesive component that constitutes adhesive layer 1, so a description of it will be omitted.
• the mixed layer A1 is provided in a range of 2% to 50% of the thickness of the base layer A.
• the upper limit is preferably 45% or less, 35% or less, 25% or less, 15% or less, or 10% or less.
• the thickness T A1 of the mixed layer A1 is not particularly limited, but is preferably 1 ⁇ m to 100 ⁇ m, 2 ⁇ m to 50 ⁇ m, or 5 ⁇ m to 30 ⁇ m.
• the porosity of the adhesive laminate sheet 10 is 25% or more.
• the porosity of the adhesive laminate sheet 10 is preferably 30% or more.
• the upper limit of the porosity of the adhesive laminate sheet 10 is not particularly limited, and is preferably, for example, 60.0%, 70.0%, or 80.0%.
• the porosity of the adhesive laminate sheet 10 is calculated as ([volume of air layer A0]/[volume of adhesive laminate sheet 10]) x [volume % of air in air layer A0], or ([volume of air layer A0] x [volume % of air in air layer A0])/[volume of adhesive laminate sheet 10].
• the porosity of the adhesive laminate sheet 10 can be adjusted by adjusting the thickness of each layer, etc.
• the adhesive laminate sheet 10 preferably has a thermal conductivity of 0.15 W/(K ⁇ m) or less, 0.12 W/(K ⁇ m) or less, or 0.10 W/(K ⁇ m) or less. When the adhesive laminate sheet 10 satisfies such a thermal conductivity, it is likely to exhibit sufficient function as an adhesive sheet having heat insulating properties.
• the thermal conductivity (k) of the adhesive laminate sheet 10 is calculated by the non-steady-state method from the "thermal diffusivity", "density” and "specific heat” using the following formula.
• the thermal diffusivity is measured using a thin film ultra-high sensitivity thermal diffusivity measurement device (ai-Phase Mobile M3 Type 1, manufactured by Ai-Phase Co., Ltd.) on the double-sided adhesive laminate sheet 10 cut into 5 cm squares in accordance with ISO 22007-3.
• the specific heat is measured using a differential scanning calorimeter (DSC) (DSC6200, manufactured by Hitachi, Ltd.) on the double-sided adhesive laminate sheet 10 cut into 5 cm squares in accordance with JIS K 7123.
• DSC differential scanning calorimeter
• the density is calculated from the weight of the double-sided adhesive laminate sheet 10 cut into 5 cm squares measured by a scale and the volume value of the double-sided adhesive laminate sheet 10 calculated in the above "void ratio calculation".
• k ⁇ C P (k: thermal conductivity [W/(m ⁇ K)], ⁇ : thermal diffusivity [m 2 /s], ⁇ : density [kg/m 3 ], C P : specific heat (specific heat at constant pressure) [J/(Kg ⁇ K)])
• the adhesive laminate sheet 10 has a change ratio (A2/ A1 ) of the adhesive strength A2 of the adhesive layer 1 after heating at 200°C for 300 hours to the adhesive strength A1 of the adhesive layer 1 at 23°C and a humidity (relative humidity ) of 50% is 0.40 or more, 0.60 or more, or 1.00 or more.
• the adhesive laminate sheet 10 has such adhesive strength, it is likely to function satisfactorily as a heat-resistant adhesive sheet.
• the adhesive strength of the adhesive laminate sheet 10 was evaluated by first polishing the surface of an aluminum alloy (A5052) plate with sandpaper, and then bonding the adhesive layer surface of the adhesive laminate sheet 10 cut to a size of 5 cm x 5 mm to the polished surface with a hand roller.
• the measurement is performed by dividing the evaluation objects into two conditions, "(1) immediately after lamination” and “(2) after lamination, heated in an oven at 200°C for 300 hours, and then cooled at room temperature for 1 hour", using a Tensilon universal testing machine (RTC-1210, manufactured by A&D Manufacturing Co., Ltd.) at a peel angle of 90° and a peel speed of 50 mm/min.
• the measurement is performed a total of five times under each of the above conditions (1) and (2), and the average value is taken as the adhesive strength.
• the adhesive strength A1 of the adhesive layer 1 is not particularly limited, and is preferably 0.05 [N/5 mm] or more, 0.1 [N/5 mm] or more, or 0.2 [N/5 mm] or more.
• the adhesive strength A2 of the adhesive layer 1 is not particularly limited, and is preferably 0.05 [N/5 mm] or more, 0.1 [N/5 mm] or more, 0.2 [N/5 mm] or more, 0.3 [N/5 mm] or more, or 0.5 [N/5 mm] or more.
• the adhesive laminated sheet 10 can be produced according to a conventionally known method as long as the method is capable of maintaining the air layer A0 within the layer.
• a specified adhesive paint (a composition containing an adhesive and a solvent) is applied to a specified nonwoven fabric sheet and dried, or a previously prepared adhesive paint film is placed adjacent to it and pressed, and an adhesive laminated sheet 10 including a substrate layer A can be obtained by controlling the air layer derived from the nonwoven fabric sheet and the mixed layer, which is the area impregnated with the adhesive component, to have an appropriate shape.
• the adhesive laminated sheet 10 can be produced, for example, by the following method. After applying an adhesive paint containing an adhesive and an appropriate solvent as an adhesive component on a release film (such as a PET film), the adhesive paint is dried to form a film provided with an adhesive layer made of the adhesive component.
• the adhesive layer made of the adhesive component provided on the release film is brought into contact with one main surface (adhesive layer 1 side main surface S A1 ) of a nonwoven fabric sheet, and while applying pressure (and heating as necessary), the adhesive layer made of the adhesive component is pressed into the nonwoven fabric sheet to impregnate a part of the adhesive component into the nonwoven fabric sheet, thereby forming a mixed layer A1.
• the part of the adhesive layer that is not impregnated into the nonwoven fabric sheet becomes the adhesive layer 1.
• the depth of pressing the adhesive layer is adjusted, etc., to form an air layer A0, which is an area where no adhesive component exists, from the other main surface S A2 side of the nonwoven fabric sheet toward the mixed layer A1.
• the release film is removed as necessary to obtain an adhesive laminated sheet 10.
• the thickness of the nonwoven fabric sheet may differ between the raw material stage and the stage of the adhesive laminated sheet 10.
• the nonwoven fabric sheet may be compressed in advance, or a nonwoven fabric sheet with a thickness that takes into account deformation of the nonwoven fabric sheet may be used.
• the manufacturing method of the adhesive laminated sheet 10 is not limited to this.
• the manufacturing method of the adhesive laminated sheet 10 may be a method in which an adhesive paint before drying is directly applied to a nonwoven fabric sheet, and the adhesive coating is dried while adjusting the impregnation of the adhesive paint into the nonwoven fabric sheet so that an air layer remains within the layer of the adhesive laminated sheet 10, thereby forming a mixed layer and an adhesive layer.
• the double-sided pressure-sensitive adhesive laminate sheet 10 has a predetermined air layer and is therefore excellent in heat insulation and conformability, and can therefore be suitably used for various heat insulation or heat resistance applications.
• ⁇ Adhesive layer thickness measurement> The thickness of the adhesive layer was measured using a micrometer (MDH-25MC, manufactured by Mitutoyo Corporation) by averaging measurements taken at five points on each of the four corners of the main surface of a 5 cm square cut adhesive layer.
• the adhesive strength of the adhesive layer was evaluated by using an aluminum alloy (A5052) aluminum plate with a surface that had been polished with sandpaper in advance, and a piece of adhesive layer with PET film on both sides that had been cut to 5 cm x 5 mm had one of the PET films peeled off to expose the adhesive layer surface, which was then bonded to the polished surface with a hand roller.
• the measurement was performed using a Tensilon universal testing machine (RTC-1210, manufactured by A&D Manufacturing Co., Ltd.) at a peel angle of 90° and a peel speed of 50 mm/min. The measurement was performed five times in total, and the average value was taken as the adhesive strength.
• Example 1 A copolymer resin made of TFE and propylene was dispersed in tetrahydrofuran (THF) to a concentration of 20 wt %, to prepare coating material 1. Next, the coating material 1 was applied onto the treated surface of a 38 ⁇ m-thick release PET film 1 using an applicator, and then dried at 90° C. for 3 minutes to obtain a composition 1 with a PET film on one side. Furthermore, the treated surface of release PET film 2, which has an easier release property than release PET film 1, was laminated to the composition 1 surface of composition 1 with a single PET film using a laminator at room temperature and 0.1 MPa to obtain adhesive layer 1 with double-sided PET films.
• THF tetrahydrofuran
• the adhesive layer 1 had a thickness of 25 ⁇ m and an adhesive strength of 0.1 N/5 mm. Then, the release PET film 2 of the adhesive layer 1 with double-sided PET film was peeled off to expose the adhesive layer 1 side, and then a nonwoven fabric sheet (Tommy Phylec F, manufactured by Tomoegawa Paper Works, Ltd.) composed of fluororesin fiber as a substrate was thermally laminated to the exposed adhesive layer 1 side using a laminator under conditions of 120°C and 0.3 MPa, thereby obtaining an adhesive laminate sheet 1 with a single-sided PET film in which the nonwoven fabric sheet was partially impregnated with the adhesive of the adhesive layer 1.
• a nonwoven fabric sheet Tommy Phylec F, manufactured by Tomoegawa Paper Works, Ltd.
• Example 2 Two pieces of the double-sided PET film-attached adhesive layer 1 prepared in Example 1 were prepared. Next, the release PET films 2 of each of the two prepared adhesive layers 1 with PET films on both sides were peeled off to expose the adhesive layer 1 surface, and then the two exposed adhesive layer 1 surfaces were laminated together using a laminator at room temperature and 0.1 MPa to obtain an adhesive layer 2 with PET films on both sides.
• the adhesive layer 2 had a thickness of 50 ⁇ m.
• one of the release PET films 1 of the adhesive layer 2 with double-sided PET film was peeled off to expose the adhesive layer 2 side, and then a nonwoven fabric sheet (Tommy Phylec F, manufactured by Tomoegawa Paper Works, Ltd.) composed of fluororesin fiber as a substrate was thermally laminated to the exposed adhesive layer 2 side using a laminator under conditions of 120°C and 0.3 MPa, thereby obtaining an adhesive laminate sheet 2 with a single-sided PET film in which the nonwoven fabric sheet was partially impregnated with the adhesive of the adhesive layer 2.
• a nonwoven fabric sheet Tommy Phylec F, manufactured by Tomoegawa Paper Works, Ltd.
• Example 3 Two pieces of the double-sided PET film-attached adhesive layer 2 prepared in Example 2 were prepared. Next, the release PET film 1 was peeled off from each of the two adhesive layers 2 with the two PET films thus prepared to expose the adhesive layer 2 surfaces, and then the two exposed adhesive layer 2 surfaces were laminated together using a laminator at room temperature and 0.1 MPa to obtain an adhesive layer 3 with the two PET films.
• the adhesive layer 3 had a thickness of 100 ⁇ m.
• one of the release PET films 1 of the adhesive layer 3 with double-sided PET films was peeled off to expose the adhesive layer 3 side, and then a nonwoven fabric sheet (Tommy Phylec F, manufactured by Tomoegawa Paper Works, Ltd.) composed of fluororesin fiber as a substrate was thermally laminated to the exposed adhesive layer 3 side using a laminator under conditions of 120°C and 0.3 MPa, thereby obtaining an adhesive laminate sheet 3 with a single-sided PET film in which the nonwoven fabric sheet was partially impregnated with the adhesive of the adhesive layer 3.
• a nonwoven fabric sheet Tommy Phylec F, manufactured by Tomoegawa Paper Works, Ltd.
• Example 4 An adhesive layer 2 with a double-sided PET film prepared in Example 2 and an adhesive layer 3 with a double-sided PET film prepared in Example 3 were prepared. Next, the release PET film 1 was peeled off from each of the two adhesive layers 2 and 3 with PET films on both sides to expose the adhesive layers 2 and 3, and then the two exposed adhesive layer surfaces were laminated together using a laminator at room temperature and 0.1 MPa to obtain an adhesive layer 4 with PET films on both sides.
• the adhesive layer 4 had a thickness of 150 ⁇ m.
• one of the release PET films 1 of the adhesive layer 4 with double-sided PET films was peeled off to expose the adhesive layer 4 side, and then a nonwoven fabric sheet (Tommy Phylec F, manufactured by Tomoegawa Paper Works, Ltd.) composed of fluororesin fiber as a substrate was thermally laminated to the exposed adhesive layer 4 side using a laminator under conditions of 120°C and 0.3 MPa, thereby obtaining an adhesive laminate sheet 4 with a single-sided PET film in which the nonwoven fabric sheet was partially impregnated with the adhesive of the adhesive layer 4.
• a nonwoven fabric sheet Tommy Phylec F, manufactured by Tomoegawa Paper Works, Ltd.
• one of the release PET films 1 of the adhesive layer 5 with double-sided PET film was peeled off to expose the adhesive layer 5 side, and then a nonwoven fabric sheet (Tommy Phylec F, manufactured by Tomoegawa Paper Works, Ltd.) composed of fluororesin fiber as a substrate was thermally laminated to the exposed adhesive layer 5 side using a laminator under conditions of 120°C and 0.3 MPa, thereby obtaining an adhesive laminate sheet 5 with a single-sided PET film in which the nonwoven fabric sheet was partially impregnated with the adhesive of the adhesive layer 5.
• a nonwoven fabric sheet Tommy Phylec F, manufactured by Tomoegawa Paper Works, Ltd.
• the adhesive layer 6 had a thickness of 25 ⁇ m and an adhesive strength of 2.0 N/5 mm. Then, the release PET film 2 of the adhesive layer 6 with double-sided PET film was peeled off to expose the adhesive layer 6 side, and then a nonwoven fabric sheet (Tommy Phylec F, manufactured by Tomoegawa Paper Works, Ltd.) composed of fluororesin fiber as a substrate was thermally laminated to the exposed adhesive layer 6 side using a laminator under conditions of 120°C and 0.3 MPa, thereby obtaining an adhesive laminate sheet 6 with a single-sided PET film in which the nonwoven fabric sheet was partially impregnated with the adhesive of the adhesive layer 6.
• a nonwoven fabric sheet Tommy Phylec F, manufactured by Tomoegawa Paper Works, Ltd.
• ⁇ Comparative Example 3> A resin consisting of a styrene-based copolymer, an aromatic hydrocarbon resin, and a polyolefin-based resin was dispersed in toluene to a concentration of 30 wt %, to prepare paint 3. Next, the coating material 3 was applied onto the treated surface of a 38 ⁇ m-thick release PET film 1 using an applicator, and then dried at 90° C. for 3 minutes to obtain a composition 3 having a PET film on one side.
• the treated surface of release PET film 2, which has an easier release property than release PET film 1 was laminated to the composition 3 surface of composition 3 with a PET film on one side using a laminator at room temperature and 0.1 MPa to obtain adhesive layer 7 with PET films on both sides.
• the adhesive layer 7 had a thickness of 27 ⁇ m and an adhesive strength of 0.9 N/5 mm.
• the release PET film 2 of the adhesive layer 7 with double-sided PET film was peeled off to expose the adhesive layer 7 surface, and then a nonwoven fabric sheet (Tommy Phylec F, manufactured by Tomoegawa Paper Works, Ltd.) composed of fluororesin fiber as a substrate was thermally laminated to the exposed adhesive layer 7 surface using a laminator under conditions of 120°C and 0.3 MPa, thereby obtaining an adhesive laminate sheet 7 with a single-sided PET film in which the nonwoven fabric sheet was partially impregnated with the adhesive of the adhesive layer 7.
• a nonwoven fabric sheet Tommy Phylec F, manufactured by Tomoegawa Paper Works, Ltd.
• each of the adhesive laminate sheets having a PET film on one side cut into a 5 cm square was cut in a direction perpendicular to the main surface to expose the cross section of each adhesive laminate sheet having a PET film on one side.
• the thickness of each adhesive laminate sheet and the thickness of the "adhesive layer", "air layer” and “mixed layer” inside the sheet were measured by image analysis using a microscope (VHX-8000, manufactured by Keyence Corporation). At this time, each thickness was measured at 20 arbitrary points in the width direction (direction perpendicular to the perpendicular direction) of the exposed cross section of the adhesive laminate sheet with one PET film on one side, and the average value was calculated.
• the void ratio was calculated as the ratio of the volume of air in the air layer to the volume of the adhesive laminate sheet.
• the void ratio of the substrate was calculated from the following formula: Note that the apparent density of the substrate was measured by a geometric measurement method in accordance with JIS Z 8807.
• Substrate porosity (%) (1-(apparent density of substrate/true density of substrate fiber material)) ⁇ 100
• the substrate porosity was calculated from the above formula, and the volume of air in the air layer was calculated by multiplying the substrate porosity by the apparent volume of the air layer calculated using the thickness of the air layer in the above "Thickness measurement.”
• the volume value of the adhesive laminate sheet was calculated using the thickness of the adhesive laminate sheet in the above "Thickness Measurement”. From the above, the ratio of the volume of air in the air layer to the volume of the obtained adhesive laminate sheet was calculated as the void ratio.
• the thermal conductivity (k) was calculated by the unsteady method from the "thermal diffusivity”, “density”, and “specific heat” using the following formula.
• the "thermal diffusivity” and “specific heat” were measured by the method described below.
• the "density” was calculated from the weight of the adhesive laminated sheet cut into 5 cm squares measured on a scale and the volume value of the adhesive laminated sheet calculated in the "void ratio calculation” above.
• k ⁇ C P (k: thermal conductivity [W/(m ⁇ K)], ⁇ : thermal diffusivity [m 2 /s], ⁇ : density [kg/m 3 ], C P : specific heat (specific heat at constant pressure) [J/(Kg ⁇ K)])
• the thermal diffusivity measurement was performed on the adhesive laminated sheet cut into a 5 cm square using an ultra-high sensitivity thermal diffusivity measurement device for thin films (ai-Phase Mobile M3 Type 1, manufactured by Ai-Phase Co., Ltd.) in accordance with ISO 22007-3.
• the specific heat measurement was performed on the adhesive laminate sheet cut into a 5 cm square using a differential scanning calorimeter (DSC) (DSC6200, manufactured by Hitachi, Ltd.) in accordance with JIS K 7123.
• DSC differential scanning calorimeter
• Adhesive strength measurement> The adhesive strength of the adhesive laminate sheet was evaluated by first polishing the surface of an aluminum alloy (A5052) aluminum plate with sandpaper, and then using a hand roller to bond the adhesive layer surface of an adhesive laminate sheet with a PET film on one side that had been cut to 5 cm x 5 mm and the PET film was peeled off to expose the adhesive layer surface of the sheet.
• the measurement was performed on the evaluation objects divided into "(1) immediately after lamination” and "(2) after lamination, heated in an oven at 200°C for 300 hours, and then cooled at room temperature for 1 hour” using a Tensilon universal testing machine (RTC-1210, manufactured by A&D Manufacturing Co., Ltd.) at a peel angle of 90° and a peel speed of 50 mm/min.
• the measurement was performed a total of five times under each of the above conditions (1) and (2), and the average value was taken as the adhesive strength.
• this embodiment has made it possible to obtain an adhesive laminate sheet with excellent heat insulation properties (for example, thermal conductivity of 0.15 W/(K ⁇ m) or less) and heat resistance.
• Adhesive laminate sheet 1 Adhesive layer A: Base material layer A0: Air layer A1: Mixed layer

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• Organic Chemistry (AREA)
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• Adhesive Tapes (AREA)

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• 2024
  • 2024-03-26 JP JP2025510987A patent/JPWO2024204285A1/ja active Pending
  • 2024-03-26 TW TW113111256A patent/TW202502550A/zh unknown
  • 2024-03-26 WO PCT/JP2024/012123 patent/WO2024204285A1/ja not_active Ceased

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