JP2002115794A - Heat insulating material, and method and device for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide heat insulating material made of plastic and used for walls, which shows heat insulation property equivalent or superior to normally used glass wool insulating material and can be substituted for it and which can be folded and is advantageous in cost. SOLUTION: Foam sheet 1 constituted of three layers of cap film 11 made of plastic and provided with a lot of projections, flat back film 12 fixed to the base of the projections, and flat liner film 13 fixed to the top of the successive projections is used as the material. By forming a corrugation 1A, where Ω-shaped cross sections continue, adjoining one another, when cross-sectionally seen, or a folded corrugation 1C, and attaching each of plastic films 3A, 3B to the base and top surfaces of the corrugation to fix the shape of the corrugation, the heat insulating material is plate-shaped. In addition to the above single- type material, double-type material is also possible, which is created by forming 2 sheets of corrugations (1A+1B or 1C+1D), attaching each base surface of the two corrugations to each side of one common plastic film 2, and attaching each of plastic films 3A, 3B to each top surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating material mainly embedded in a wall of a building such as a house, a warehouse, a public building, or a vehicle. In the present invention, the “plastic bubble sheet” refers to a molded product comprising a plastic cap film provided with a large number of protrusions and a flat plastic back film bonded to the bottom surfaces of the protrusions. Connect the tops of the protrusions, another one
Also included is a three-layer foam sheet with two flat plastic liner films attached.

[0002]

2. Description of the Related Art As a heat insulating material to be embedded in a wall of a building as described above, glass wool is generally formed into a plate shape, and in some cases, both surfaces are covered with an aluminum vapor-deposited film. This glass wool heat insulating material is used by being cut into an appropriate size in construction or by being cut in advance and embedding it between wall materials. The usability of cutting and embedding is not very good.

Further, when the glass wool heat insulating material is cut, the glass fibers are exposed from the cut or the short pieces are scattered, which causes a problem of sticking to the operator's skin and causing discomfort. There is also a risk of entering the lungs. A similar problem occurs when demolishing a house. Further, in the glass wool heat insulating material, the packing density tends to be uneven due to the manufacturing method of solidifying the glass fiber with an adhesive, which causes variation depending on the place of the heat insulating effect.

[0004] Another problem is that this type of insulation is susceptible to moisture, depending on the environmental conditions,
When moistened after construction, the heat insulation effect may be sharply reduced.

On the other hand, a so-called bubble sheet, in which a flat back film is adhered to the bottom surface of a projection on a cap film made of a plastic such as polyethylene and provided with a number of projections, also serves as a cushioning material. Also, it is used for a wide range of applications as a heat insulating material. There is also a three-layer foam sheet formed by bonding another flat liner film by connecting the tops of the projections. If the inventors use this kind of bubble sheet as a heat insulating material embedded in a wall,
With the expectation that the above-mentioned problems associated with the insulating material of glass wool would be solved, a laminated material of a foam sheet was prototyped.

[0006] When the performance was measured, high heat insulation was obtained, but it was still unavoidable that the weight increased to some extent, it was difficult to bend, and it was disadvantageous for transportation and storage. There is a weakness that can not be. In addition, it turned out that the cost was actually too high to be used for normal use. The laminated material is disadvantageous in that the operation cost increases because the batch operation requires one process for each laminated sheet, while the amount of the bubble sheet used is increased.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is not only to solve the above-mentioned problems of the conventional glass wool heat insulating material, but also to reduce the weight while using a cellular sheet as a material, and to increase the cost of the laminated material. Another object of the present invention is to provide a high-performance wall heat insulating material that can be bent and has improved workability, which has not been achieved with a heat insulating material using a foamed sheet as a laminated material.

[0008]

The heat-insulating material for achieving the object of the present invention includes a "sparsely-packed type" and a "densely-packed type".
There is. First, a loose-fill type single type will be described. As shown in FIG. 1, a foamed plastic sheet or a plastic foam sheet (1) is bent to
A corrugate (1A) having a continuous cross-sectional shape in which the mold cross-sections are in contact with each other is formed, and one plastic film (2) is adhered to the bottom surface of the corrugate, or one corrugated film is formed on the top surface in addition to the bottom surface. This is a heat insulating material that is made into a plate-like body by attaching a piece of plastic film (3) and fixing the corrugated shape. FIG. 1 shows an embodiment in which a plastic film is also attached to the top surface of the corrugate.

As shown in FIG. 3, the heat-insulating material of the present invention is a densely-packed, single-type heat-insulating material, in which a plastic foam sheet (1) is folded to form a folded corrugate (1C) having a constant height. By attaching the bottom surface of this corrugate to one common plastic film (2), or attaching one plastic film (3) to the top surface in addition to the bottom surface, and fixing the corrugated shape. It is a heat insulating material in the form of a plate.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the heat insulating material of the present invention, as shown in FIG. 2, a loosely-filled double type is obtained by bending two foamed plastic sheets or plastic foam sheets (1) to form an Ω-shaped cross section. Form a corrugate (1A, 1B) having a continuous cross-sectional shape, and affix the two bottom surfaces to one common plastic film (2) or add one side to the bottom surface Alternatively, one or more plastic films (3A, 3B) may be attached to the top surfaces on both sides, and the corrugated shape may be fixed to form a plate-like heat insulating material. FIG.
Shows an embodiment in which plastic films (3A, 3B) are adhered to the respective top surfaces of the corrugates (1A, 1B) on both sides.

In the heat insulating material of the present invention, a densely packed type double type is formed by folding a plastic foam sheet to form folded corrugates (1C, 1D) of a fixed height, as shown in FIG. The bottom surfaces of the two corrugates are attached to a common plastic film (2), or one or both top surfaces are added to the bottom surface.
Or one plastic film each (3A, 3B)
A heat insulator made into a plate-like body by sticking and fixing the corrugated shape. FIG. 4 shows the corrugates (1) on both sides.
(C, 1D) shows an embodiment in which a plastic film (3A, 3B) is stuck to each top surface.

As shown in FIG. 5, the plastic foam sheet comprises a plastic cap film (11) provided with a number of projections, a flat plastic back film (12) bonded to the bottom of the projections, and A three-layer air bubble sheet (1) made of a flat plastic liner film (13) with the tops of the projections bonded together is suitable. As the foamed plastic sheet, a foamed polyethylene or polystyrene foam sheet is used.

Even if any of the above four types is selected, the shape of the corrugate is fixed by attaching the bottom surface to a single plastic film, and has a function as a heat insulating material. By attaching a plastic film to the shape, the shape and thickness of the heat insulating material become constant, and at the same time, the number of air chambers that perform the heat insulating action increases, and the flow of air between them can be prevented. Excellent ones are obtained. Generally, the densely packed type has higher heat insulation performance than the loosely packed type.
On the other hand, since the latter is easier to bend the heat insulating material than the former, the degree of freedom in construction is higher.

A corrugate formed of a foamed plastic sheet or a plastic foam sheet has an axis of an Ω-shaped cross section or a folded surface with respect to a direction perpendicular to the surface of the heat insulating material as shown in FIGS. It is preferable to be inclined. The tilt angle is fixed by applying a plastic film to the top of the corrugate. By forming the corrugated shape to one side in this way, for example, in FIG. 1, three lines of plastic sheets having heat insulating properties are always present in a line penetrating in a direction perpendicular to the plane of the plate. In addition, the space between the two plastic films on both sides is divided into at least three layers, and heat conduction by air convection is limited to each room, thereby realizing high heat insulation.

The preferred angles and dimensions of the respective parts in such an embodiment are in the following ranges in FIG. α: 0 to 85 degrees, preferably 30 to 70 degrees d: 5 to 10 mm t: 4 to 12 mm T: 10 to 30
mm

The larger the inclination angle α is, the more reliable the adjacent Ω-type corrugates come into contact with each other, and the convection is effectively prevented by the above-mentioned subdivision of the air chamber, and the heat insulation effect is enhanced. Although it is preferable, making it too large is difficult in manufacturing, and 85 degrees is a practical limit. Usually, the range of 30 to 75 degrees, and in most cases, the range of 45 degrees is within a range in which both ease of manufacture and heat insulation performance are easily achieved.

D is the diameter of a circle assumed at the bent portion of the corrugate, and defines the size of the subdivided air chamber. From the viewpoint of preventing convection, a high heat insulating property is obtained when the thickness is 10 mm or less. The smaller is more preferable, but the practical limit is about 5 mm.

The thickness t of the plastic foam sheet (1)
Is naturally determined by the thickness of the product. If an off-the-shelf product is used, it will be selected from the range of 4 to 12 mm.

The thickness T of the whole heat insulating material depends on a balance between a desired heat insulating performance and a space allowed in a place of use. When insulating the walls of a building, it is usually required to be 10 mm or more, and the necessary space is provided. When the thickness is required, the heat insulating material of the modified mode must be used, and the basic mode or the modified mode can be used two or three times, and it is needless to say that the layers can be used by overlapping. is there.

[0020] The method of the present invention for producing a loosely-packed, single-type heat-insulating material comprises supplying a single foamed plastic sheet or a plastic foam sheet between a pair of meshed gears and bending the Ω-shaped sheet. A single corrugate with a continuous cross-sectional shape is formed by contacting the cross-sections, and a plastic film melt-extruded from a T-die is brought into contact with the bottom of this corrugate and bonded together to form a plate. A body is formed, and in some cases, a plastic film melt-extruded from another T-die is brought into contact with the top surface of the corrugate constituting the plate-like body, and the two are bonded to each other.

The method of the present invention for producing a loose-filled, double-type insulation is likewise provided by feeding two foamed plastic sheets or plastic foam sheets between each two pairs of gears engaged and bending them. This forms two opposing corrugates in which the Ω-shaped cross-sections are contiguous and have a continuous cross-sectional shape, and the opposing bottom surfaces of the two corrugates are formed on both surfaces of one plastic film melt-extruded from a T-die. A plate was formed by bringing the three members into contact with each other and, in some cases, was further melt-extruded from another T-die onto one or both top surfaces of two corrugates constituting the plate. It consists of bonding one or two plastic films together.

The method of the present invention for producing a densely packed, single-type heat insulating material is a method in which a single plastic foam sheet is fed between a pair of meshed gears and bent, and the bent surfaces are overlapped to be folded. A single corrugated sheet is formed, and one plastic film melt-extruded from a T-die is brought into contact with the bottom of the corrugated sheet to bond them together to form a plate-like body. On the top surface of the corrugate that constitutes the plate,
It consists of contacting a plastic film melt-extruded from another T-die and bonding them together.

[0023] The method of the present invention for producing a densely packed, double-type insulation is provided by feeding two plastic foam sheets between each pair of meshed gears to bend, and overlapping the bent surfaces. Then, two folded corrugates are formed, and a plate-like body is formed by contacting the opposing bottom surfaces of the two corrugates with both surfaces of one plastic film melt-extruded from a T-die and bonding the three members together. Formed and, optionally, further, on one or both of the top surfaces of the two corrugates making up the plate, another T
It consists of contacting and bonding one or two plastic films melt-extruded from a die.

As shown in FIG. 6, the apparatus of the present invention for producing the loosely-packed, single-type heat insulating material by carrying out the first method among the above-mentioned production methods comprises the following components. . That is, a means (not shown) for continuously supplying a long foamed plastic sheet or a plastic foam sheet, a gear belt (4) provided with ridges running in the width direction at regular intervals on an endless belt, A gear (5) that meshes with the strip to bend the supplied sheet into a corrugated shape, a driving means for rotating the gear belt and the gear, and a T-die (6) for melt-extruding a plastic film.
A) and a pair of a gear belt and a backup endless belt (7) for attaching the melt-extruded plastic film to the bottom surface of the corrugate are the minimum components. Optionally, another T-die (6B) for melt extruding the plastic film,
It may include a pair of an endless crimping belt (8) and another backup endless belt (7 ') for affixing the plastic film melt extruded from the die to the top surface of the corrugate.

When the endless belt for crimping (8) is used,
By adjusting the crimping condition, especially the distance to the backup endless belt (7 '), the inclination angle of the corrugated shaft and the thickness of the whole heat insulating material can be adjusted.

As can be understood from the above description, the apparatus of the present invention for manufacturing a loosely-packed double-type insulation material has a plastic film common to two corrugates and a symmetrical axis. Is also developed on the right side, and comprises the following components. That is, means for continuously supplying two long foamed plastic sheets or plastic foam sheets, a gear belt provided with ridges running in the width direction at regular intervals on an endless belt, and meshing with ridges of the gear belt. And two sets of gear pairs forming a corrugate by bending the supplied heat-insulating plastic sheet, driving means for rotating the pair of gear belts and gears, and a T-die for melt-extruding the plastic film. Minimal components. Optionally, one or two additional T dies for melt extruding the plastic film, and one or two crimps for attaching the plastic film melt extruded from the T die to the top surface of the corrugate. An endless belt and another backup endless belt that is paired with the endless belt for crimping may be provided.

The apparatus of the present invention for producing a close-packed, single-type heat insulating material must add a means for folding a corrugate obtained by bending to an apparatus for producing a loose-packed type. . Folding is nothing less than eliminating the corrugated spacing. In addition, in forming the corrugate, the supply speed becomes slower in the course of folding, so that the supply of the plastic film must be synchronized with that of the folded corrugate.

Therefore, this apparatus comprises a means for continuously feeding a long plastic foam sheet, a gear belt provided with ridges running in the width direction at regular intervals on an endless belt, and meshing with the ridges to supply the same. Pair of gears that bends a folded sheet into a corrugated shape, a driving means for rotating a gear belt and gears, a pair of endless belts that receive supplied corrugates and fold by discharging at a speed lower than the supply speed, a plastic film T to melt extrude
A pair of an endless belt for crimping and an endless belt for backup for attaching the die and the melt-extruded plastic film to the bottom surface of the corrugate are the minimum components. In some cases, a further T-die for melt-extruding the plastic film, and another pair of the endless belt for crimping and the endless belt for backup for attaching the plastic film melt-extruded from the T-die to the top surface of the corrugate. What is sometimes provided is the same as a loose-packing type manufacturing apparatus.

The apparatus according to the present invention for producing a double-type insulation material of a close-packed type has a structure in which a common plastic film is applied to two corrugates, as is clear from the description of the single / double type of the loosely-packed type. With the axis of symmetry,
It has a structure in which a single type device is also deployed on the right side. However, also in this case, the supply of the plastic film must be synchronized with that of the folded corrugate, as in the case of the single-type manufacturing apparatus.

The manufacturing apparatus including such a difference continuously supplies two long plastic foam sheets.
Means, a pair of a gear belt in which ridges running in the width direction are provided on the endless belt at regular intervals, and a gear which meshes with the ridges to bend the supplied plastic foam sheet to form a corrugate. A set, a driving means for rotating the gear belt and the gears, two sets of a pair of endless belts which receive two supplied corrugates and fold by discharging at a speed lower than the supply speed, and melt-extrude a plastic film. Minimal components are a die and a pair of endless belts for attaching the melt-extruded plastic film to the bottom surfaces of the two corrugates. Optionally, one or two additional T dies for melt extruding the plastic film, and one or two crimps for attaching the plastic film melt extruded from the T die to the top surface of the corrugate. It is the same as the manufacturing apparatus described above in that an endless belt and another backup endless belt that is paired with one endless belt for pressure bonding may be provided.

In producing a close-packed type heat insulating material,
As means for folding the long bubble sheet, in addition to the above-described bending and subsequent compression, it is also possible to perform compression almost simultaneously with bending. An example of such a means is shown in FIG.
Shown in

In FIG. 7, a long bubble sheet supplied from above is located at a position slightly shifted from each other, but is one of two insertion plates (9A, 9B) which move in contrast, for example, as shown in FIG. (9A) periodically advances from the lateral direction with respect to the sheet to be supplied along the rectangular trajectory (a to d) shown by the broken line (a to b), and as a result,
Bendable. The left insertion plate (9A) moves downward (b → c) with the seat inserted most deeply into the sheet, while the right insertion plate (9B) is symmetrical with the left insertion plate. It moves forward from the side and then moves down. Immediately before the left insertion plate overlaps the lower right insertion plate, the lower right insertion plate retreats, escapes from between the sheets, and moves upward. When the right insertion plate moves downward, the left insertion plate holding down the folded sheet retreats (C → D), escapes from between the sheets, and moves upward again (D → A). ) To prepare for the next step. By repeating this, long sheets are folded one after another.

In the heat insulating material of the present invention, if desired,
It is possible to add a thin film of metal for reflecting heat rays to the component. This can be easily realized by using a plastic film to be attached to a corrugate provided with a thin film of aluminum or the like by means such as lamination or vapor deposition of foil. The metal foil has a thickness of at least 10 μm, while the vapor-deposited film is only a few tens of millimeters thick. There is. Therefore, when a vapor deposited film is adopted as the thin metal layer, it is preferable that a plastic layer, for example, an epoxy resin coat layer having a thickness of several μm be present on the surface so that the metal does not come into direct contact with air.

When a plastic foam sheet is used as a material, the height of the foam is desirably 7 mm or more in terms of the size of the foam, which has been empirically found concerning the heat insulating effect. On the other hand, too high a height is naturally limited, since the diameter must be increased accordingly and the volume of air bubbles that can be produced becomes too large, and in practice 12 mm is the limit. The internal volume of the bubbles is desired to be 0.3 cm ³ or more, which is also known empirically. The upper limit of the bubble volume is around 8.5 cm ³ , and if the size exceeds this, convection of air occurs inside the bubbles and the heat insulating effect is reduced.

The higher the density at which bubbles are distributed, the better. It is rather in terms of the ease of air flow in relation to the volume of air bubbles surrounded by the cap film and the back film and the volume of the area around the air bubbles surrounded by the cap film and the liner film. This is because it is considered advantageous to lower the ratio of the latter. In reality, even in the existing grades of bubble sheets, bubbles exist at a fairly high density, and the above volume ratio is almost 5%.
0:50, which is sufficient.

[0036]

Example 1 and Comparative Example A low-density polyethylene was used as a material to produce a three-layer foam sheet having the following structure. Cap film thickness: 60 μm Back film thickness: 45 μm Liner film thickness: 15 μm Cap: 20 mm in diameter × 8 mm in height, staggered, Cap density (ratio of area occupied by bubbles on the surface of bubble sheet): 50 %

A heat insulating material having the structure shown in FIG. 1 was manufactured using the apparatus having the structure shown in FIG. On the bottom and top surfaces of the corrugate, one polyethylene film having a thickness of 20 μm, which was melt-extruded, was attached. The angle of inclination and the dimensions of each part are as follows. α: 60 degrees d: 8 mm t: 5 mm T: 25 mm

As a result of examining the heat insulating performance of this heat insulating material, a value of 3.2 W / m ² · Kcal was obtained as a heat transmission coefficient. This value is comparable to the value of 3.0 W / m ² · Kcal for a 30 mm thick glass wool insulation tested in the same manner for comparison.

[0039]

Example 2 Using the same low-density polyethylene as in Example 1, a three-layer foam sheet having the following structure was produced. Cap film thickness: 50 μm Back film thickness: 35 μm Liner film thickness: 15 μm Cap: diameter 10 mm × height 4 mm, staggered arrangement, cap part density: 50%

A heat insulating material having the structure shown in FIG. 2 was manufactured using an apparatus having the structure shown in FIG. A melt-extruded polyethylene film having a thickness of 20 μm was attached to the bottom surface and both top surfaces of the two corrugates. The angle of inclination and the dimensions of each part are as follows. α: 45 degrees d: 20 mm t: 10 mm T: 50
mm

This heat insulating material has a heat transmission coefficient of 1.2 W / m ² · Kc
al, indicating higher insulation performance than when using conventional 50 mm thick glass wool insulation.

[0042]

Example 3 A heat insulating material having a structure shown in FIG. 3 and having a thickness of 40 mm was manufactured from the three-layer foam sheet manufactured and used in Example 2. A melt-extruded polyethylene film having a thickness of 20 μm was attached to the bottom surface and both top surfaces of the corrugate. The inclination angle of each surface is 30 degrees. The heat transmission coefficient of this heat insulating material was 2.0 W / m ² · Kcal.

[0043]

Since the heat insulating material of the present invention is made of a plastic foam sheet or a foam sheet, there is no danger of tingling and inhalation of fibers like glass wool heat insulating material commonly used for building walls. Work comfortably and comfortably. It is also possible to use the device along the bent portion of the wall, and in particular, the loose-packing type is easy. Insulation performance is not inferior to glass wool insulation, as shown in the data of the examples. In particular, the double type has high heat insulation.

In terms of the cost of the heat insulating material itself, the heat insulating material of the present invention, particularly the loosely-filled type, is composed of one or two layers of corrugated foamed or foamed sheets. It is more advantageous than insulation,
Competitive with glass wool insulation.

As for the heat insulation performance, the tightly packed type is naturally higher than the loosely packed type. However, the loose filling type is advantageous for following the curved surface. Therefore, sparse / dense filling and single / double filling are appropriately selected and combined,
It is possible to manufacture a heat insulating material suitable for the application. Although it is thin, it shows practically sufficient heat insulating performance, so that the heat insulating material of the present invention can be expected to be used widely.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the structure of a loosely-packed, single-type heat insulating material according to the present invention.

FIG. 2 is a longitudinal sectional view showing the structure of a loosely-packed and double-type heat insulating material according to the present invention.

FIG. 3 is a longitudinal sectional view showing the structure of a close-packed, single-type heat insulating material according to the present invention.

FIG. 4 is a longitudinal sectional view showing the structure of a closely packed double-type heat insulating material according to the present invention.

FIG. 5 is an enlarged longitudinal sectional view showing the inclination angle of the corrugate and the dimensions of each part in a typical embodiment of the heat insulating material of FIG. 1 (using a plastic foam sheet).

FIG. 6 is a conceptual layout diagram of a main part showing a configuration of an apparatus for manufacturing the heat insulating material having the structure shown in FIG.

FIG. 7 is a conceptual diagram showing another embodiment of the means for manufacturing the heat insulating material having the structure shown in FIGS. 3 and 4.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 plastic bubble sheet 11 cap film 12 back film 13 liner film 1A, 1B corrugate 1C, 1D corrugate (folded) 2 plastic film (pasted on bottom of corrugate) 3, 3A, 3B plastic film (top of corrugate) 4 Gear belt 5 Gear 6A, 6B T-die 7, 7 'Endless belt for backup 8 Endless belt for crimping 9A, 9B Insertion plate α Angle of inclination of corrugated shaft d Diameter of air chamber formed by corrugated t Thickness of plastic sheet having thermal insulation T Thickness of thermal insulation

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masaki Iwasaka 2-50, Senari-dori, Nakamura-ku, Nagoya-shi, Aichi F-term in Kawakami Sangyo Co., Ltd. (Reference) 2E001 DD01 FA04 GA12 GA23 GA42 GA82 HD01 HD11 JD02 KA03 LA09 LA19 MA01 3H036 AA09 AB18 AB26 AB32 AC03 4F100 AK01A AK01B AK01C AK04A AK04B AK04C AR00B AT00A AT00C BA03 BA06 BA32 DD12B DD13B DJ01B DJ02B GB07 GB31 JJ02 JL01 JL03 JL05

Claims (16)

[Claims] 1. A foamed plastic sheet or a plastic foam sheet is bent to form a corrugate having a Ω-shaped cross-section and a continuous cross-sectional shape, and one plastic film is attached to the bottom surface of the corrugate. Or, a heat insulating material made into a plate-like body by fixing a corrugated shape by attaching one plastic film to the top surface in addition to the bottom surface. 2. A corrugated foamed plastic sheet or plastic foamed sheet is bent to form a corrugate having a cross-sectional shape in which the Ω-shaped cross-sections are contiguous and continuous. A heat insulating material formed into a plate-like body by attaching to a film or attaching one or each plastic film to one or both top surfaces in addition to a bottom surface and one or both top surfaces. 3. A plastic foam sheet is folded to form a corrugate having a certain height, and one plastic film is attached to the bottom surface of the corrugate, or one plastic film is attached to the top surface in addition to the bottom surface. A heat insulator made into a plate-like body by sticking and fixing the corrugated shape. 4. A plastic foam sheet is folded to form a corrugate having a certain height, and the bottom surfaces of the two corrugates are adhered to a common plastic film, or one or both tops are added to the bottom surface. A heat insulating material formed into a plate by attaching one or each plastic film to the surface and fixing the corrugated shape. 5. A plastic cap film provided with a number of projections, a flat plastic back film bonded to the bottom surface of the projections, and a flat plastic film bonded to the tops of the projections. The heat insulating material according to any one of claims 1 to 4, which is a three-layer foam sheet made of a plastic liner film. 6. The foamed plastic sheet or plastic foam sheet according to claim 1, wherein the axis of the Ω-shaped cross section, or the surface of the folded plastic foam sheet is inclined with respect to a direction perpendicular to the surface of the heat insulating material. A heat insulating material according to any one of 1 to 4. 7. The angle and size of each part in FIG.
The heat insulating material according to claim 1 or 2, which is in the following range. α: 0 to 85 degrees, preferably 45 to 70 degrees d: 5 to 10 mm t: 4 to 12 mm T: 10 to 30
mm 8. The method for manufacturing a heat insulating material according to claim 1, wherein one Ω-shaped foamed sheet is supplied and bent between a pair of meshed gears. A single corrugate with a continuous cross-sectional shape is formed by contacting the cross-sections, and a plastic film melt-extruded from a T-die is brought into contact with the bottom of this corrugate and bonded together to form a plate. A manufacturing method comprising: forming a body; and, in some cases, further contacting a plastic film melt-extruded from another T-die with the top surface of the corrugate constituting the plate-like body, and bonding the two together. 9. A method for producing a heat insulating material according to claim 2, wherein two foamed plastic sheets or plastic foam sheets are supplied between each two pairs of gears engaged with each other and bent. Form two opposing corrugates with a continuous cross-sectional shape in which the Ω-shaped cross-sections are in contact with each other, and bring the opposing bottom surfaces of the two corrugates into contact with both surfaces of one plastic film melt-extruded from a T-die. A plate is formed by laminating the three members, and in some cases, another T is provided on one or both of the top surfaces of the two corrugates constituting the plate.
A production method comprising: contacting and bonding one or two plastic films melt-extruded from a die. 10. A method for manufacturing a heat insulating material according to claim 3, wherein one plastic foam sheet is fed between a pair of meshed gears and bent, and the bent surfaces are overlapped to be folded. A single corrugated sheet is formed, and one plastic film melt-extruded from a T-die is brought into contact with the bottom of the corrugated sheet to bond them together to form a plate-like body. A manufacturing method comprising: bringing a plastic film melt-extruded from another T-die into contact with the top surface of a corrugate forming a plate-like body; 11. A method of manufacturing a heat insulating material according to claim 4, wherein two plastic foam sheets are supplied between each pair of gears engaged with each other and bent, and the bent surfaces are overlapped. Then, two folded corrugates are formed, and a plate-like body is formed by contacting the opposing bottom surfaces of the two corrugates with both surfaces of one plastic film melt-extruded from a T-die and bonding the three members together. Formed, and further, if necessary, 2
A manufacturing method comprising: contacting and bonding one or two plastic films melt-extruded from another T-die to one or both top surfaces of a book corrugate. 12. When one or two plastic films melt-extruded from another T-die are brought into contact with and bonded to the top surface of one or two corrugates, the corrugate is pushed down and a shaft having an Ω-shaped cross section is pressed. 12. The method for manufacturing a heat insulating material according to claim 8, wherein the folded surface is inclined with respect to a direction perpendicular to the surface of the heat insulating material. 13. An apparatus for manufacturing a heat insulating material according to claim 1, comprising means for continuously feeding a long foamed plastic sheet or a plastic foam sheet, and a ridge running in a width direction on an endless belt. A gear belt (4) provided at regular intervals, a gear (5) meshing with the ridge to bend the supplied sheet into a corrugated shape, a driving means for rotating the gear belt and the gear, and a T for melting and extruding a plastic film. A die (6A) and a pair of a gear belt and a backup endless belt (7) for attaching the melt-extruded plastic film to the bottom surface of the corrugate are made as a minimum component part. Another T to melt extrude the film
A manufacturing apparatus including a die (6B), a pair of an endless belt for crimping (8) and another endless belt for backup (7 ') for attaching a plastic film melt-extruded from the T-die to the top surface of a corrugate. . 14. An apparatus for producing a heat insulating material according to claim 2, comprising means for continuously supplying two long foamed plastic sheets or plastic foam sheets.
A pair of a gear belt in which ridges running in the width direction are provided at regular intervals on an endless belt and a gear that meshes with the ridges of the gear belt to bend a supplied heat-insulating plastic sheet to form a corrugate. Two sets, a drive means for rotating the pair of gear belts and gears, and a T-die for extruding the plastic film as a minimum component, and possibly another one for extruding the plastic film. Two T dies, one or two endless crimping belts for affixing the plastic film melt-extruded from the T dies to the top surface of the corrugate, and a pair with one endless crimping belt for crimping. Production equipment with another endless belt for backup. 15. An apparatus for producing a heat insulating material according to claim 3, wherein means for continuously supplying a long plastic foam sheet, and ridges running in the width direction on the endless belt are provided at regular intervals. Gear belt and this ridge mesh
A pair of gears that bends a supplied sheet into a corrugated shape, a driving means for rotating a gear belt and gears, a pair of endless belts that receive supplied corrugates and fold by discharging at a speed lower than the supply speed, plastic A T-die for melt extruding the film, and
A pair of an endless belt for crimping and an endless belt for backup for attaching the melt-extruded plastic film to the bottom of the corrugate is a minimum component part, and in some cases, another T-die for melt-extruding the plastic film. A manufacturing apparatus having another pair of an endless belt for crimping and a backup endless belt for attaching a plastic film melt-extruded from the T-die to the top surface of a corrugate. 16. An apparatus for manufacturing a heat insulating material according to claim 4, wherein two means for continuously supplying two long plastic foam sheets, a protrusion running in the width direction on an endless belt. Two sets of pairs of gear belts provided with ridges at regular intervals, and gears that mesh with the ridges to bend the supplied plastic foam sheet to form a corrugate, driving means for rotating the gear belt and gears, Two sets of pairs of endless belts that receive the two supplied corrugates and fold by discharging at a speed lower than the supply speed, a T-die that melt extrudes the plastic film, and two melt-extruded plastic films A pair of endless belts to be attached to the bottom surface of the corrugate is a minimum component, and in some cases, the plastic film is melt-extruded. One or two T-die, one or two endless crimping belts for attaching a plastic film melt-extruded from the T-die to the top surface of the corrugate, and one endless belt for crimping. Production equipment with another endless belt for backup that is paired with the individual.