JPH0911378A - Laminate - Google Patents

Abstract

PURPOSE: To enhance execution properties, heat insulating properties and sealability by coating the surface of open-cell foam or fiber aggregate in a compressed state with a film. CONSTITUTION: The surface of open cell foam or a fiber laminate in a compressed state is coated with a film. The open cell ratio of the foam is pref. 5% or more, more pref., 50% or more. The fiber aggregate is composed of, for example, rock wool, glass wool or cellulose fibers. In a film coating method, for example, a sandwich member consisting of the foam 3 having a large number of holes provided to the upper and rear surfaces thereof by needling and the films 4, 5 holding the foam from above and below is arranged between upper and lower heated presses 1, 2 and compressed by the presses 1, 2 to cover the upper and rear surfaces of the foam with the films 4, 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminate having excellent heat insulating property, filling property, sealing property and workability. The laminated body according to the present invention is a pipe heat insulating material, a building material heat insulating material, a packaging cushioning material, a sports leisure cushioning material, and civil engineering, construction, storm winds such as connection points of vehicles, dustproof, soundproofing, waterproof sealing material,
It is preferably used in fields such as joint materials.

[0002]

2. Description of the Related Art Conventionally, as a sealing material for a gap, a foamed body is used in which the foamed wall is covered with chloroparaffin or the like by an impregnation treatment method and the foamed body is compressed. In this compressed foam, the cell walls adhere to each other, but this adhesion is peeled off by the restoring (recovering) force of the foam material, and the foam material gradually returns to the starting structure. However, since this sealing material is obtained by impregnating the open-cell foam as described above and then compressing it, it cannot be said that it exerts a sufficient sealing action.

Therefore, a sealing material has been proposed in which a foam is provided with a liquid-impermeable layer, which gradually restores its original shape after being compressed and deformed (Japanese Patent Publication No. 3-55621, Japanese Patent Laid-Open No. 1562/1993).
-193465, Japanese Patent Laid-Open No. 1-216169).

However, this is because 1) it must be impregnated, which is troublesome. 2) Impregnated chloroparaffin or the like flows out from the foam, and especially when used in an environment of high temperature, the outflow is remarkable, 3) Since it is impregnated, it has a low heat insulation performance and cannot be used as a heat insulation material.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and to provide heat insulation, filling, sealing,
It has excellent workability, so it is a heat insulating material for pipes, heat insulating material for building materials, cushioning material for packaging, cushioning material for sports and leisure,
Civil engineering, construction, storms in vehicles, dustproof, soundproof, etc.
It is an object of the present invention to provide a laminated body which is preferably used in the fields of waterproof sealing material, joint material and the like.

[0006]

According to the present invention, there is provided a laminate in which a film is coated on the surface of an open-cell foam or a fiber assembly in a compressed state.

A) First, a foam having open cells will be described.

Throughout this specification, "open-cell foam" is a foam having open cells, which is formed by connecting the independent cells of a foam having innumerable closed cells, originally having an open cell ratio. For example, a foam having a high degree is used.

The foam used in the laminate according to the present invention is not particularly limited, but may be compression set (JIS K6767).
"Based on the polyethylene foam test method") is preferably 20% or less, more preferably 10% or less. The resins used to make such foams are as follows.

As the thermoplastic resin among the raw material resins, any resin having foamability may be used, such as polyethylene resin, polypropylene resin, ethylene-propylene copolymer, ethylene-propylene-diene copolymer, ethylene-vinyl acetate copolymer. Polymer, polybutene resin, olefin resin such as chlorinated polyethylene resin, polystyrene, styrene resin such as styrene-acrylic copolymer, polymethyl acrylate resin, polymethyl methacrylate resin, acrylic such as ethylene-ethyl acrylate copolymer -Based resins, polyvinyl chloride resins, vinyl halide resins such as polyvinyl fluoride resins, polyamide resins such as 6-nylon, 66-nylon and 12-nylon, polyester resins such as polyethylene terephthalate and polybutylene terephthalate , ABS resin, polycarbonate resin, polyacetal resin, polyphenylene sulfide resin, polyether ether ketone resin, polyether imide resin, silicone resin, thermoplastic urethane, various elastomers. These may be crosslinked.

Any thermosetting resin may be used as long as it has a foaming property, such as urethane resin, epoxy resin, phenol resin, urea resin, melamine resin,
Examples include silicon resins, imide resins, and cured products of unsaturated polyester.

These resins may be used alone or in combination of two or more kinds.

The open cell rate of a foam having open cells is
It is preferably 5% or more, more preferably 50% or more. When the open cell ratio is small, the gas in the bubbles is not removed during compression, so that the foam cannot keep a compressed state, and the foam expands at the same time when the compression is released. The following two methods can be mentioned as a method for producing an open-cell foam.

1) A foam having innumerable closed cells is produced by a foaming agent decomposition method, a solvent vaporization method, a chemical reaction method or the like, and the closed cells are made to communicate with each other by piercing the foam with, for example, needle-like projections. .

2) Originally, a foam having a high open cell rate is produced.

The compression ratio of the foam is 15% or more of the volume before compression when uniformly compressed in three directions, and 10 of the dimension before compression when compressed only in one direction (for example, the sheet shape and the thickness direction). % Or more is preferable.

The compression is preferably carried out within the elastically deforming region of the resin used for the foam. When the compression exceeds the elastic deformation region and enters the plastic deformation region or exceeds the breaking point, expansion (compression recovery) of the foam does not occur. Therefore, if the compression amount is made too small, the recovery becomes worse.

B) Next, the fiber assembly will be described.

The fiber assembly refers to a material in which a large number of fibers are entangled with each other and formed into a sheet shape, a board shape, and the like, and examples thereof include rock wool, glass wool, and cellulose fiber.

C) Next, the coating film will be described.

As the film used in the present invention, the volume of the foam or the fiber assembly is Vcm ³ , the surface area of the foam or the fiber assembly is Scm ² , and the air permeation amount of the film is Pcm ³ / cm ² · hr · Atm is V /
Those having a relationship of (S × P) = 1 to 1000 are preferable. The type of film resin and the thickness of the film are not particularly limited.

If the value of V / (S × P) is too small, the amount of air that permeates into the laminate is too large and the foam or fiber assembly expands before the laminate of the present invention is applied as a heat insulating material. Resulting in. On the other hand, if it is too large, the amount of air that permeates is too small and it takes time to expand, resulting in a poor expansion rate.

Here, the volume V of the foam or fiber assembly
For, the dimension of the shape (for example, rod shape) of the foam or the fiber assembly is measured, and the volume of the solid having the same shape is calculated as the volume of the foam or the fiber assembly.

The surface area S of the foam or fiber assembly is obtained by measuring the dimension of the shape (for example, rod shape) of the foam or fiber assembly and calculating the surface area of the solid of the same shape as the surface area of the foam or fiber assembly. To do.

For the method of measuring the air permeation amount P, see JI
The measurement is performed based on S-7126 "Method for testing gas permeability of plastic films and sheets".

As a method of coating a film on the surface of an open-cell foam or a fiber assembly in a compressed state, the following 3 is used.
One method is illustrated.

1) A film is heat-laminated and adhesive-laminated on the surface of the foam in a compressed state. More specifically, a large number of holes are formed in at least one surface of the foam having a high closed cell rate by using a needle or the like. Then, the film on the perforated surface is heat-laminated or adhesive-laminated under pressure with a roll, press or the like. In the heat laminating method, a film and a foam are superposed on a heated metal plate, a roll or a styrene belt, and these are pressed and thermally bonded. In the adhesive lamination method, press,
The adhesive-coated film and the foam are laminated between rolls or steel belts, and these are pressed and bonded.

In the pressing method shown in FIG. 1, a foamed body (3) having a large number of holes formed in the upper and lower surfaces by needles and a film (4) sandwiching the upper and lower surfaces between the heated upper and lower presses (1) and (2). ) (Five)
Arrange a sandwich body consisting of and press this up and down
(1) Compress it with (2) and put the film (4) on the top and bottom of the foam (3).
(5) is coated.

In the roll method shown in FIG. 2, a foamed body (13) having a large number of holes formed by needles on the upper and lower surfaces between heated upper and lower rolls (11, 12) and a film ( 14)
(15) and the upper and lower surfaces of the foam (13) are covered with the films (14) and (15) by being compressed by the upper and lower rolls (11) and (12).

2) The foam or fiber assembly is sandwiched between films or packed in a film bag and pressed, rolled,
Heat seal or bond the opening in a compressed state with a double belt.

In the pressing method shown in FIG. 3, the upper and lower press (1)
A film bag (34) containing a foam (3) with a large number of holes on the top and bottom with needles is placed between (2) and compressed by the top and bottom presses (1) and (2) to foam. The body (3) is covered with a film bag (34). Further, the mouth portion (34a) of the film bag (34) is sealed by heat lamination or adhesive lamination.

In this method, it is more preferable to evacuate the air inside the film bag with a vacuum pump or the like, because it is possible to prevent the foam or fiber assembly from expanding due to the excess air inside the film bag.

In the roll method shown in FIGS. 4 (a) and 4 (b), a foam body (13) having a large number of holes formed by needles on the upper and lower surfaces between the upper and lower rolls (11) and (12), and Film to be sandwiched between (1
(4) Pass the film (15) and compress it with the upper and lower rolls (11) (12) to coat the films (14) (15) on the upper and lower surfaces of the foam (13). The upper and lower rolls (11) (1
2) Press the large diameter parts (11a) and (12a) at both ends to press-bond and seal with heat laminate or adhesive laminate.

3) The foam or fiber assembly is packed in a film bag and the air in the film bag is evacuated by a vacuum pump or the like.

The shape of the laminated body of the present invention is not particularly limited and may be determined according to the place to be used as a heat insulating material, for example, rod shape, tube shape, sheet shape, and further rectangular shape, It may have a corrugated plate shape, a U-shaped irregular cross section, or a chip shape such as a spherical shape or a piece shape.

[0036]

The laminate according to the present invention expands by absorbing air. The expansion principle of such a laminate is considered as follows.

Compressive stress (internal force) generated by compression and atmospheric pressure (external force) are applied to the laminated body, and the internal force and the external force are in a balanced state. Here, when air enters the laminate through the film, the pressure inside the laminate increases, the internal force becomes larger than the external force, and the laminate expands.
As the laminate expands, the pressure inside the laminate decreases, and the internal force and the external force are balanced to reach an equilibrium state. Furthermore, the laminated body expands in the same manner as air enters the laminated body through the film, and the laminated body repeats air permeation and expansion of the laminated body.

As described above, the expansion of the laminate is a phenomenon caused by the balance between the compressive stress of the laminate and the atmospheric pressure generated by the permeation and compression of air into the laminate through the film. Therefore, the degree of expansion can be controlled by setting the strength of the laminate by setting the resin, setting the expansion ratio, and setting the gas permeability by selecting the film.

[0039]

[Examples] Example 1 (using an open-cell foam produced by punching with a needle) Low-density polyethylene (Sumikasen G201: manufactured by Sumitomo Chemical Co., Ltd.) 100 parts by weight dicumyl peroxide (1 minute half-life temperature 171 ° C) 0 6 parts by weight of azodicarbonamide (decomposition temperature 198 ° C.) 15 parts by weight of a resin composition was mixed with a screw extruder (diameter φ).
The resin was supplied from a hopper of 50 mm, L / D = 30) to the raw material supply port of the extruder, and the resin was melt-kneaded in the extruder. The cylinder temperature of the extruder was set to 105 ° C, 115 ° C, 120 ° C and 120 ° C from the hopper toward the tip of the extruder.

Then, the melt-kneaded product of the resin composition is continuously extruded into a sheet at an extrusion rate of 10 kg / h from a die of a shaping die having a thickness of 5 mm and a width of 200 mm set at a temperature of 120 ° C. did.

A hot air heating furnace was provided immediately after the shaping die, and the extruded sheet was heated at a temperature of 170 ° C. in the first half of the hot air heating furnace to be crosslinked, and then heated in the second half of the hot air heating furnace. It was made to foam by heating at 250 ° C.

The obtained foam has a thickness of 16 mm and a width of 61 mm.
It is a 0 mm sheet, and the expansion ratio is 29.5.
Double, the independent foaming ratio was 86%, and the compression set was 5.9%.

The sheet-like foam was pierced with a needle in the thickness direction to form a hole, thereby allowing the closed cells to communicate with each other, and the closed cell ratio was 5% or less.

Then, as shown in FIG. 2, the foam was passed between upper and lower rolls having a clearance set to 8 mm, and a polyethylene film was thermally laminated on the upper and lower surfaces of the compressed foam sheet while being compressed. A laminate having a thickness of 8 mm was obtained.

The polyethylene film used here has a thickness of 40 μm, the volume V per 1 m of the foam is 61 × 100 × 1.6 = 9760 cm ³ , and the surface area per 1 m of the foam is S is (61 x 100) x 2+
(100 × 1.6) × 2 + (61 × 1.6) × 2 = 12
715.2 cm ² , the air permeation amount P of the film is 0.01
cm ³ / cm ² · hr · atm, and therefore, the relationship of V / (S × P) = 76.8 per 1 m in length is obtained.

The laminated body thus obtained is vertically 300 mm ×
It was cut to a width of 300 mm. This cutting piece is 300 mm long
× width 300 mm × thickness 16 mm (8 mm thick foam 2
Sheet), and the shrinkage rate of the laminate was 50%.

It is to be noted that this laminated body was subjected to 3
The shape after 0 days is 300 mm long × 300 mm wide × thickness 3
0 mm, the shrinkage of the laminate was 94%.

Example 2 (originally using a foam having a high open cell ratio) Low-density polyethylene (Sumikasen G801: manufactured by Sumitomo Chemical Co., Ltd.) 100 parts by weight Azodicarbonamide (decomposition temperature 198 ° C.) 15 parts by weight α, α'- Bis (t-butylperoxy-m-isopropyl) benzene (Perbutyl P: NOF Corporation) 2 parts by weight Urea 2 parts by weight Zinc oxide 1 part by weight Olefin-modified silicone oil (KF-412: Shin-Etsu Chemical Co., Ltd.) 1 part by weight Parts, and melt-knead for 5 minutes with a mixing roll having a surface temperature of 120 ° C, then the temperature is 120 ° C and the pressure is 150 kg / c.
A sheet having a thickness of 1 mm was prepared by pressing at m ² for 5 minutes.

This sheet is 250 mm long × 250 mm wide
When cut into the shape of, the thin piece was placed on a Teflon sheet and heated in an oven at a temperature of 190 ° C. for 5 minutes to obtain an open-cell foam having a thickness of 15.5 mm.

The obtained foam has a length of 335 mm and a width of 33.
The sheet was 5 mm × thickness 15.5 mm and had a foaming ratio of 27.5 times, a closed cell ratio of 4%, and a compression set of 1.8%.

This foam is 300 mm long × 300 mm wide
It was cut into the shape of. Two pieces of this thin piece are stacked and a polyethylene film bag (length 340 mm × width 400 mm × thickness 40
μm), the whole was compressed with a press plate to a thickness of 15 mm, and the opening of the polyethylene film bag was heat-sealed while evacuating the air inside the film bag with a vacuum pump to obtain a laminate.

The volume V per meter of the foam is 2
790 cm ³ , surface area S per 1 m of foam length is 2
172 cm ² , the air permeation amount P of the film is 0.01 cm
³ / cm ² · hr · atm, and therefore the relationship V / (S × P) = 128 was obtained.

The laminate thus obtained has a length of 300 mm.
X width of 300 mm x thickness of 15 mm (two foams having a thickness of 7.5 mm), and the shrinkage rate of the laminate was 48%. The shape of this laminated body after 30 days under normal temperature and pressure is 300 mm in length × 300 mm in width × 30 mm in thickness,
The shrinkage of the laminate was 97%.

Comparative Example 1 (Ordinary Thermoplastic Resin Foam Insulation Material) A sheet-like foam was obtained in the same manner as in Example 1 except that the needle was not bored in the foam. This foam is
It is a sheet with a thickness of 15 mm and a width of 610 mm,
The expansion ratio was 29.5 times, the closed cell ratio was 86%, and the compression set was 5.9%.

This foam was cut in the same manner as in Example 1.
The cut pieces obtained were 300 mm long × 300 mm wide × 30 mm thick (two foams having a thickness of 15 mm),
This form was used for the evaluation test described later.

No film was applied to the strips. There was no change in the magnification and shape of this foam after 30 days under normal temperature and pressure.

Comparative Example 2 (Impregnated Foam) The open-cell foam prepared in Example 1 was impregnated with chlorparaffin (Toyo Parax A-40, manufactured by Tosoh Corporation), and this foam was precompressed. To a thickness of 8 mm (compression rate 50%). A liquid-impermeable foam (Softron # 3008 manufactured by Sekisui Chemical Co., Ltd.) having a thickness of 8 mm was adhered to the upper and lower surfaces of the pre-compressed foam (adhesion was due to an adhesive action of chlorparaffin), and then obtained. Vertical stack of 300m
It was cut into m × 300 mm in width.

This cut piece has a length of 300 mm and a width of 300 m.
m x thickness 24 mm [8 mm (impregnated foam) +8
mm (liquid impermeable foam) x 2 sheets],
The shrinkage of the laminate was 75%.

It should be noted that this laminated body was subjected to 3
The shape after 0 days is 300 mm long × 300 mm wide × thickness 3
1 mm [(8 mm (liquid impermeable foam) x 2 sheets + 1
5 mm (impregnated foam)], and the shrinkage of the laminate was 97%.

Performance Evaluation 1 The performance of the laminate or foam obtained in Examples 1 and 2 and Comparative Examples 1 and 2 as a heat insulating material was evaluated. The evaluation method is as follows. Adiabaticity: The thermal conductivity at 0 ° C was measured. However, the laminates of Examples 1 and 2 and Comparative Example 2 were expanded (30
After a day) measurement was performed. Workability: Work for cutting the laminate into a shape of 300 mm length × 300 mm width, filling the cut pieces into an acrylic plate container having a space of 300 mm length × 300 mm width × 30 mm depth, and closing the lid. A sensory evaluation was conducted on the sex. Fillability: By visual observation, the gap between the heat insulating material made of the laminate or the foam and the inner wall of the container was observed. The evaluation results are summarized in Table 1.

[0061]

[Table 1] Example 3 A sheet-like foam was obtained in the same manner as in Example 1. This foam was a sheet having a thickness of 16 mm and a width of 610 mm, and had a foaming ratio of 29.5 and a closed cell ratio of 86%. A laminate having a thickness of 8 mm was obtained in the same manner as in Example 1 except that a nylon-6 film (thickness 20 μm) was used as the coating film.

The volume V per 1 m of the foam is 9
150 cm^Three, The surface area S per 1 m of foam length is 1
2683 cm^Two, The air permeability P of the film is 0.003
cm ^Three/ Cm^Two· Hr · atm, and thus the relationship V / (S × P) = 240 was obtained.

The laminate thus obtained has a width of 15 mm ×
It had a length of 300 mm and a thickness of 8 mm, and the shrinkage rate of the laminate was 50%. The shape of this laminate after 30 days under normal temperature and pressure is 15 mm in width and 300 m in length.
m × thickness 15 mm, the shrinkage of the laminate is 94
%Met.

Example 4 A sheet-like foam was obtained in the same manner as in Example 2. This foam has a length of 335 mm x width of 335 mm x thickness of 15.5 mm.
The sheet had a foaming ratio of 27.5 times and a closed cell ratio of 4%.

Using this sheet-like foam, a laminate was obtained in the same manner as in Example 3. The resulting laminate has a width of 15 mm
The length was 300 mm and the thickness was 8 mm, and the shrinkage rate of the laminate was 52%.

It should be noted that this laminated body was subjected to 3
The shape after 0 days is 15 mm wide x 300 mm long x 1 thick
The shrinkage of the laminate was 97%.

Comparative Example 3 (Foam without holes) A sheet-like foam was obtained in the same manner as in Example 3 except that the holes of the foam were not punched. This foam is
It is a sheet with a thickness of 15 mm and a width of 610 mm,
The expansion ratio was 29.5 times and the closed cell ratio was 86%.

This foam was cut in the same manner as in Example 3.
The obtained cut piece had a width of 15 mm, a length of 300 mm, and a thickness of 15 mm.

No film was applied to the strips. There was no change in the magnification and shape of this foam after 30 days under normal temperature and pressure.

Comparative Example 4 (Impregnated Foam) The open-cell foam prepared in Example 1 was impregnated with chlorparaffin (Toyo Parax A-40, manufactured by Tosoh Corporation), and this foam was precompressed. To a thickness of 8 mm (compression rate 50%). A liquid-impermeable foam (Softron # 3002 manufactured by Sekisui Chemical Co., Ltd.) having a thickness of 2 mm was adhered to the upper and lower surfaces of the pre-compressed foam (adhesion was due to an adhesion action of chlorparaffin), and thus obtained. 15mm width
C. A strip having a length of 300 mm was cut. This cut piece has a width of 15
mm × length 300 mm × thickness 12 mm [8 mm (impregnated foam) +2 mm (liquid impermeable foam) × 2
Sheets], and the shrinkage rate of this laminate was 60%.

Performance Evaluation 2 The shape of this laminate after 30 days at normal temperature and pressure was 15 mm in width × 300 mm in length × 19 mm in thickness, and the shrinkage rate of the laminate was 95%.

The laminates or foams obtained in Examples 3 and 4 and Comparative Examples 3 and 4 were evaluated for performance as a sealing material. The evaluation method is as follows.

Sealing property: As shown in FIG. 5, the laminate (24) as a sealing material is bent into a U shape, and 150 mm in length × 2 in width.
A transparent acrylic resin plate (21) of 00 mm is attached to one surface with a double-sided adhesive tape, and an embossed steel plate (22) is arranged on the side of the acrylic resin plate (21) to which the sealing material is attached. The acrylic resin plate (21) and the embossed steel plate Two vertical spacers (23) are interposed between the (22) and the clearance between the acrylic resin plate (21) and the embossed steel plate (22) is 10 by the bolt (25) and the spacer (23).
mm (15 mm in Comparative Example 4). Water was injected into the U-shape of the laminate (24) as a sealing material up to a height of 55 mm, this state was maintained for 24 hours, and the presence or absence of water leakage was observed.

However, the laminates of Examples 3 and 4 and Comparative Example 4 were evaluated after expansion (30 days after being caught). Workability: width 10 mm x depth 20 mm, width 15 in comparative example 4
A sensory evaluation was performed on the workability when the laminate as a sealing material was packed in a groove having a size of mm × 20 mm. The evaluation results are shown in Table 2.

[0075]

[Table 2] Example 5 Glass wool ("GW", density 24 kg / m3, thickness 5)
0 mm: manufactured by Asahi Fiber Glass Co., Ltd. was cut into a length of 300 mm and a width of 300 mm. This cut piece is a polyethylene film bag (length 370 mm × width 420 mm × thickness 40 μm)
The whole was compressed with a press plate to a thickness of 25 mm, and the opening of the polyethylene film bag was heat-sealed while evacuating the air in the film bag with a vacuum pump to obtain a laminate.

The volume V of the glass wool is 4500 cm.
³ , the surface area S of glass wool is 2400 cm ² , the air permeation amount P of the film is 0.01 cm ³ / cm ² · hr · a
tm and therefore V / (S × P) = 187.5.

The laminate thus obtained has a length of 300 mm.
× width 300 mm × thickness 25 mm, the shrinkage of the laminate was 50%. The shape of this laminate after 30 days under normal temperature and pressure is 300 mm in length × 300 in width.
mm × thickness: 49 mm, the shrinkage of the laminate was 98%.

Comparative Example 5 Glass wool ("GW", density 24 kg / m3, thickness 5)
0 mm: manufactured by Asahi Fiber Glass Co., Ltd. was cut into a length of 300 mm and a width of 300 mm. No film was applied to this strip. The magnification and shape of this glass wool after 30 days at room temperature and normal pressure did not change.

Comparative Example 6 A sheet-like foam was obtained in the same manner as in Example 1 except that the needle was not punched in the foam. This foam is
It is a sheet with a thickness of 15 mm and a width of 610 mm,
The expansion ratio was 29.5 times and the closed cell ratio was 86%.

This foam is 300 mm long × 300 mm wide
Cut into the shape of 3 pieces, and glue the 3 foams (Esdyne N
O. 278, manufactured by Sekisui Chemical Co., Ltd.) to obtain a thickness of 4
A 5 mm layered foam was obtained. The foam thus obtained was 300 mm in length × 300 mm in width × 45 mm in thickness (three foams having a thickness of 15 mm). No film was applied to this strip. There was no change in the magnification and shape of this foam after 30 days under normal temperature and pressure.

Performance Evaluation 3 The laminates or foams obtained in Example 5 and Comparative Examples 5 and 6 were evaluated for performance as a heat insulating material. The evaluation method is as described in the performance evaluation 1. The evaluation results are summarized in Table 3.

[0082]

[Table 3]

[0083]

EFFECTS OF THE INVENTION Since the laminate according to the present invention is compressed before construction, it can be easily inserted into the space to be filled and is excellent in construction. Further, this laminated body expands by absorbing air after construction and fills the space, so that it has excellent heat insulation and sealing properties. Therefore, the laminate according to the present invention can be suitably used as a heat insulating material, a cushioning material, a sealing material and the like.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view showing a method of coating a film on a surface of an open-cell foam or a fiber assembly in a compressed state by a pressing method.

FIG. 2 is a vertical cross-sectional view showing a method of coating a film on the surface of an open-cell foam or a fiber assembly in a compressed state by a roll method.

FIG. 3 is a vertical cross-sectional view showing a method of coating a film on the surface of an open-cell foam or a fiber assembly in a compressed state by a pressing method.

FIG. 4 is a vertical cross-sectional view showing a method of coating a film on the surface of an open-cell foam or a fiber assembly in a compressed state by a roll method.

FIG. 5 is a perspective view showing a sealability performance test.

[Explanation of symbols]

 (1) (2): Top and bottom press (3): Foam (4) (5): Top and bottom film (11) (12): Top and bottom rolls (11a) (12a): Large diameter part (13): Foam ( 14) (15): Upper and lower films (21): Transparent acrylic resin plate (22): Embossed steel plate (23): Spacer (24): Foam (25): Bolt (34): Film bag (34a): Mouth

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naga Koike 3-4-7 Toranomon, Minato-ku, Tokyo Sekisui Chemical Co., Ltd.

Claims (1)

[Claims] 1. A laminate in which a film is coated on the surface of a compressed open-cell foam or a fiber assembly.