JP2000309988A - Multi-layered platelike heat insulation material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate separation of a platelike material and enhance recyclability while specifying the adhesive strength of an internal member and a surface material and/or the adhesive strength of the internal member and a rear face material. SOLUTION: An adhesive 5 is applied to form a plurality of continuous lines on the rear face of an internal member 3. After a rear face material is placed on the adhesive 5, it is pressed through two rollers to stick the rear face material to the rear face of the internal member 3. Subsequently, the adhesive 5 is applied on the surface of the internal member 3 likewise to adhere the surface material. Instead of this, the adhesive 5 is applied on the rear face of the internal member 3 to form a plurality of continual lines. After the rear face material is adhered to the rear face of the internal member 3 likewise, the adhesive 5 is applied on the surface of the internal member 3 to form continual lines and to stick the surface material to the surface of the internal member 3. In this time, the adhesive strength of the internal member and the surface material and/or the adhesive strength of the internal member and the rear face material is set 0.01-3.0 kgf/cm2. In this way, the facing material and the internal member can be easily separated from each other and the waste can be separately recovered and the recyclability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-layer plate-like heat insulating material which is capable of separating and collecting an inner member of a multi-layer plate-like heat insulating material and a front and back surface material and has excellent recyclability.

[0002]

2. Description of the Related Art In recent years, in the field of construction, in order to enhance the airtightness of a building and reduce the transfer of heat between the outside air and the indoor side, it is common to use a heat insulating material for a wall structure of the building. It is a target.

[0003] The multi-layer plate-shaped heat insulating material has an inner member having a heat insulating effect and a function not originally provided in the inner member, such as waterproofing, moistureproofing, and the like.
A surface material and / or a back surface material having functions such as sound insulation and fire prevention (hereinafter, one or both of these are simply referred to as “face materials”
This is a high-value-added heat insulating material that is made into a panel by combining it with a conventional material.
The inner member used for the multi-layer plate-shaped heat insulating material is usually firmly bonded to the entire surface of the face material with an adhesive or an adhesive.

[0004] By the way, waste materials of the above-mentioned heat-insulating material generated at the time of demolition of a building and cutting waste generated at the time of heat-insulating work have been generally incinerated as industrial waste or used as a landfill material. Met. In recent years, from the viewpoint of preserving the global environment, there has been a growing social demand for recycling, and there is a strong demand for reuse of these heat insulating materials.

[0005] Of the multi-layer plate-like heat insulating materials, there are cases in which a material using paper as a face material is directly crushed into chips and recycled as cushioning materials. However, for example, it is impossible to pulverize a soft surface material that uses a vinyl chloride resin or the like as a part of the material or a hard surface material such as an iron plate or a wooden plate as it is. Since the inner member is firmly adhered as described above, it is extremely difficult to separate them,
The road to recycling has been closed.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems, and an object of the present invention is to provide a face material for recycling used multi-layer plate-like heat insulating material. It is an object of the present invention to provide a multi-layer plate-shaped heat insulating material that can easily separate the inner member from the inner member.

[0007]

SUMMARY OF THE INVENTION The present inventors have conducted various studies in order to achieve the above object, and as a result, have found that the adhesive strength between the face material of the multi-layer plate-shaped heat insulating material and the inner member is determined by a specific peel adhesive strength. It has been found that, by having the above, there is no problem when constructing, and it is easy to separate and collect.

The present invention is based on this finding, and provides a multi-layer plate-shaped heat insulating material in which an inner member and a surface material and / or a back surface material are bonded at an interface between the inner member and the surface material. The adhesive strength or / and the adhesive strength between the inner member and the backing material is 0.01 to 3.0 k in peel adhesive strength.
gf / cm ² .

In the present invention, the surface material and the back surface material are materials that need to be separated, such as plastic films, metal foils, metallized films, or composites thereof, plywood, iron, copper, aluminum, and stainless steel. Metal plates such as steel, gypsum boards, inorganic material plates such as calcium silicate plates, foamed plastics, and various other types of inorganic heat insulating plates can be used.

As the inner member, synthetic resin foams such as rigid polyurethane foam, polystyrene foam, polyethylene foam and phenol foam, foamed rubber, glass wool, rock wool, cellulose foam and the like can be used. With a surface material that does not need to be separated (for example, paper such as kraft paper, calcium carbonate mixed paper or non-woven fabric surface material, or PP, PE, etc.) With a multi-layer face material with a moisture-proof resin).

The bonding strength between the front and back members and the inner member is determined by considering only the separation and collection of the front and back members and the inner member.
When the building is dismantled (that is, when several decades have passed since the building was constructed), it is desirable that the size be as small as possible because the front and back materials and the internal members can be easily separated from each other. It is desirable that it be strong from the viewpoint of workability. In the present invention, a value of 0.01 to 3.0 kgf / cm ² is obtained as a value of the peeling adhesive strength by the following measuring method.
And

[Method of Measuring Peeling Adhesive Strength] From a multilayer plate-like heat insulating material, 200 mm × 200 m centering on the bonded portion
m, and a suitable adhesive (for example, a product name “Quick Mender” manufactured by Konishi Co., Ltd.) is uniformly applied to the front and back surfaces of the test piece. It is composed of a T-shaped cross section (hereinafter referred to as a T-shaped plate), and the bottom plate is 200 mm (length) × 200 mm (width) × 20 mm
(Thickness), vertical plate is 200mm (length) x 100mm
(Height) x 5mm (thickness), heat insulating material is sandwiched between both T-shaped plates, and both vertical plates are pulled by an appropriate tensile tester). Let it.
The jig to which this test piece was crimped was set on a tension tensile tester (for example, UCP-5T, a universal tensile tester manufactured by A & D) having a capacity of 5 tons or more, and the tensile load of the vertical plate of the jig was set. (Kgf) and the deformation (cm) of the test piece at that time are measured every time, and these values at the time of yielding or breaking of the test piece are measured. The measurement is performed three times, and the average value is adopted. The value obtained by dividing this average value (tensile load) by the area of the test piece (200 mm × 200 mm) is defined as the temporary peel adhesion strength (kgf / cm ² ). On the other hand, the value obtained by dividing the adhesive application density of the multi-layer plate-shaped heat insulating material by the adhesive application density of the test piece was used as the density conversion value, and the value obtained by multiplying the above temporary peel adhesion strength by the density conversion value was used as the peel adhesion strength. And In addition,
The adhesive application density in the case of the multilayer heat insulating material of the present invention is such that the area where the adhesive is applied is determined by the area where the adhesive is applied, Divided by the area of the front surface or the back surface.

When the heat insulating material is less than 0.01 kgf / cm ² , the front and back surface materials and the inner member are peeled off when the heat insulating material is applied to a building or when the heat insulating material is handled. When the heat insulating material exceeds 3.0 kgf / cm ² , It becomes difficult to manually peel (peel up) the front and back members from the inner member.

[0014] If the adhesive strength is within the above range, not only can it be sufficiently peeled off by hand, but also the multi-layer plate-like heat insulating material usually has a front and / or back face material. As it penetrates the inner member and is held with screws or nails in the building frame, when using the heat insulating material, each face material and the inner member will be in close contact, and as a heat insulating material to the building During use for decades, no inconveniences occur.

According to the type (adhesiveness) of these two materials, the hot-melt type adhesive such as polyolefin, ethylene-vinyl acetate copolymer resin (EVA), polyamide, synthetic rubber, etc. Agent; adhesive such as ethylene vinyl acetate emulsion, acrylic emulsion, urethane, epoxy, rubber, urea, melamine, resorcinol, phenol, etc .; The coating is performed on both or any one of the surfaces to be bonded, and the two surfaces are pressed against each other in the same manner as in a normal bonding operation.

In order to reliably obtain the above-mentioned peeling adhesive strength, it is easy to separate the inner member from the surface material or the back surface material to facilitate the separation, and to shorten the curing time of the adhesive to reduce the length of the panel. In order to increase the productivity, a hot melt type adhesive as described above, or a combination of the hot melt type adhesive and another adhesive as described above, is used to form a line or / and a dot. Adhering is preferred.

In the case of linear bonding, there is no limitation, but generally, a plurality of substantially parallel continuous lines are used. The width and interval of each line are not particularly limited either, and are appropriately selected according to the dimensions, weight, required strength, type of the internal member and the front and back materials, the type of the adhesive to be used, the adhesive application device, and the like. However, in order to reliably obtain the above-mentioned peeling adhesive strength, generally, the width is preferably about 2 to 200 mm, and the interval between the lines is about 5 to 600 mm in the width of this range. preferable.

The bonding in the form of dots is not limited, but is generally performed in the form of a plurality of substantially parallel intermittent lines or in the form of random dots. The size and interval of each point is not particularly limited, as in the case of the linear bonding described above, the dimensions, weight, required strength, type,
Alternatively, it is appropriately selected according to the type of the adhesive to be used, the adhesive application device, and the like. However, in order to reliably obtain the above-mentioned peeling adhesive strength, the size is generally 5 to 10 in area.
Is preferably set to 000 mm ² approximately, the spacing between the points is preferable to be 3~300mm about the average in size in this range.

In any of the linear bonding and the point bonding,
In the vicinity of the peripheral portion of the multilayer plate-shaped heat insulating material of the present invention, the bonding portion is made to have a high density, and the inside is made to have a low bonding portion in order to improve the releasability between the front and back surface materials and the internal member. preferable.

The amount of the adhesive to be applied is not particularly limited, and the dimensions, weight, required strength, type, and used adhesive of the inner member and the front and back materials are the same as in the case of the linear / dot bonding described above. Is appropriately selected depending on the type of the adhesive, the adhesive application device, and the like.
And to 250 g / ^{m 2} approximately, also considering the density of the adhering portions of the about 10 to 250 g / ^{m 2} in the vicinity of the periphery portion, it is preferable that the 1 to 100 g / ^{m 2} about internally. Note that the application amount is not a value obtained by dividing the application amount by the actual bonding area, but is an application amount per panel unit area.

The front and back members may be adhered to one side of the inner member (that is, a surface member on the surface of the inner member or a back member on the back surface of the inner member), or may be bonded to both sides (that is, the front member of the inner member). -The front surface material and the back surface material may be bonded to both the back surfaces. Further, the inner member and the front and back members may be bonded to each other without gaps by using the same adhered surfaces of both sides, or as the inner member, the adhered surface of the front and back members A plurality of smaller members may be used, and a plurality of inner members may be bonded to one of the front and back members with a gap provided.

The multi-layer plate-shaped heat insulating material of the present invention having the above-mentioned structure can be applied to a building by a usual application method. Further, the waste material of the present heat insulating material generated at the time of dismantling the building can easily separate (peel up) the front and back surface materials from the inner member, and can realize the separation and collection of both materials. If it is possible to recover the original material and its original properties to some extent, it is possible to reuse those materials as they are or after performing a simple regeneration process.

[0023]

Example 1 Hard polyurethane foam (30 kg / m ³ ) having kraft paper laminated on the front and back sides 50 mm × 910 mm × 242
0 mm as an internal member, an iron plate (3.05 kg / m ² ) as a surface material, 0.4 mm × 910 mm ×
2420 mm, plywood as backing material (6 kg / m ² )
12 mm x 910 mm x 2420 mm were adhered using an ethylene vinyl acetate adhesive as a hot melt adhesive in the following manner (1) and (2).

The procedure of (1): First, as shown in FIG. 1 (a), the adhesive 5 is applied to the back surface of the inner member 3 in a plurality of parallel lines (three in this embodiment). On this adhesive 5,
Although not shown, after placing the back member, the back member was adhered to the back surface of the inner member 3 by pressure bonding between a pair of two rollers. The width of each line after the crimping is set to 30 mm, the interval in the width direction is set to 420 mm, and the application amount is 50 g / m ^2.
(The value obtained by dividing the total application amount by the area of the back surface of the inner member 3). Thereafter, the adhesive 5 was applied to the surface of the inner member 3 in the same manner as described above, and the surface material was bonded. Inner member 3 at this time
The adhesive application density (value obtained by dividing the area where the adhesive was applied by the area of the inner member 3) was 9.5% (cm ² / cm ² ) for both the front and back surfaces.

Procedure of (2): As shown in FIG.
The adhesive 5 is applied to the back surface of the inner member 3 in a dot-like manner so as to form a plurality of random (three rows in this example) intermittent lines as a whole, in the same manner as in the above (1). Then, a back surface material was bonded to the back surface of the inner member 3. The size of each point after the pressure bonding was 15 mm in width, 30 mm in length, the average length in the length direction was 30 mm, and the width in the width direction was 420 mm. The application amount was 15 g / m ² (the total application amount was (Value divided by the area of the back surface of the material 3). Thereafter, the adhesive 5 is applied to the surface of the inner member 3 in a random dot-like manner as described above,
A surface material was adhered to the surface of the inner member 3 in the same manner as in the above (1). The adhesive application density of the inner member 3 at this time is 2.5% (cm ² / cm
² ).

FIG. 2 is a cross-sectional view showing the multi-layer plate-shaped heat insulating material 1 of the present invention obtained in the manner described in (1) and (2) above. In FIG. 2, the same reference numerals as those in FIGS.
It has the same meaning as (a) and (b), 2 indicates a front surface material, and 4 indicates a back surface material. As shown in FIG. 2, the multilayer plate-shaped heat insulating material 1 of the present invention has a structure in which the inner member 3 and the front and back members 2 and 4 are partially adhered by the adhesive 5.

The peel adhesive strength of the multilayer plate-shaped heat insulating material 1 was measured and calculated according to the above-described method for measuring the peel adhesive strength, and as a result, was as follows. In the case of (1), the average of the surface material 2 and the inner member 3 is 0.24 kgf / cm ^2.
0.25 kgf / c average between the back material 4 and the inner member 3
It was m ^2. For the manner of (2), an average 0.12 kgf / cm ² at the surface member 2 and inner member 3, an average 0.20kgf / cm ² on the back surface member 4 and the inner member 3. When these multilayer plate-shaped heat insulating materials 1 were constructed on a building, the inner member 3 and the front and back members 2 and 4 did not peel off.

Further, regarding the above-mentioned multi-layer plate-shaped heat insulating material 1,
An attempt was made to separate the inner member 3 from the front and back members 2 and 4 in the manner shown in FIG. That is, first, the worker B presses the inner member 3, the worker A pulls the front member 2 toward the user, and then the worker A presses the back member 4 in the same manner, and the worker B presses the inner member 3.
Was pulled toward you. As a result, the surface material 2 and the back surface material 4 of the above-mentioned multilayer plate-shaped heat insulating material 1 could be beautifully separated from the inner member 3. At this time, there was no peeling at the interface between the foam of the inner member and the kraft paper.

Example 2 A plate-like rigid polyurethane foam (35 k
g / m ³ ) An ABS sheet as a surface material (0.95 kg /
m ² ) 1 mm × 910 mm × 1820 mm and an iron plate (3.05 kg / m ² ) 0.4 mm × 910 as a back surface material
mm × 1,820 mm was adhered using a polyolefin adhesive as a hot melt adhesive and an epoxy adhesive as another adhesive in the following manner (1) and (2).

Procedure of (1): In the manner of (1) of the first embodiment, a plurality of (in this example, three rows × 2 kinds = 6) continuous lines of the back member 4 on the back surface of the inner member 3. Glued together. At this time, the hot melt type adhesive 5 and the other adhesive 6
, The width of each line 5, 6 is 15 mm, the interval between each line 5, 6 is 40 mm, each line 5,
6 as one set, the set interval in the width direction is 420 mm, and the application amount is 30 g / h for both the hot melt adhesive 5 and the other adhesive 6.
m ² (a value obtained by dividing the total applied amount by the area of the back surface of the inner member 3). Thereafter, the surface material 2 was bonded to the surface of the inner member 3 in the same manner as described above. At this time, the adhesive application density of the inner member 3 was 9.5% (cm
² / cm ² ).

Procedure of (2): In the procedure of (2) of the first embodiment, the back material 4 is provided on the back surface of the inner member 3 in a plurality of random but entirely parallel (3 rows × 2 types in this example) (6 pieces) were adhered in the form of a dotted line. At this time, the hot-melt type adhesive 5 and the other adhesive 6 are applied in the form of an intermittent line similar to FIG. 5 as in the case of the above (1), and the size of each point is 15 mm in width, Length 30 mm, lengthwise spacing 30 mm on average, spacing between lines 5 and 6 40 mm, width spacing pair 420 mm, coating amount 15 g / m for both hot melt adhesive 5 and other adhesives 6 ² (the value obtained by dividing the total applied amount by the area of the back surface of the inner member 3). Thereafter, the surface material 2 was bonded to the surface of the inner member 3 in the same manner as described above. At this time, the adhesive application density of the inner member 3 was 4.9% (cm ² / cm
² ).

The peel adhesion strength was as follows.
In the case of (1), the average of the surface material 2 and the inner member 3 is 0.1.
It was 8 kgf / cm ² , and the average of the back material 4 and the inner member 3 was 0.26 kgf / cm ² . In the case of (2), the surface material 2 and the inner member 3 average 0.09 kgf / cm ^2.
The average of the back material 4 and the inner member 3 is 0.12 kgf / c.
It was m ^2.

Example 3 Two inner members 3 each having a size of 50 mm × 385 mm × 1820 mm were used, the back material 4 was not used, and the coating amount of the hot melt type adhesive 5 was 45 g / m ² (total coating). Example 1 except that the amount was divided by the area of the surface of the inner member 3).
As described in (1) above, the multilayer plate-shaped heat insulating material 1 of the present invention comprising the inner member 3 and the surface material 2 arranged in parallel was manufactured. FIG. 6 is a plan view of the multilayer plate-shaped heat insulating material 1 as viewed from the back side.
FIG. 6A is a cross-sectional view, and FIG. The peel adhesion strength between the inner member 3 and the surface material 2 of the heat insulating material 1 is as follows:
It was 0.21 kgf / cm ² .

Comparative Example 1 The amount of the hot-melt adhesive 5 applied was 5 g / m ² (the value obtained by dividing the total applied amount by the surface area of the inner member 3) in the case of bonding to the surface material 2. 3g / m in the case of bonding with material 2
² (the value obtained by dividing the total coating amount by the area of the back surface of the inner member 3), and the inner member 3 and the front / back material 2 were formed in the same manner as in (1) and (2) of Example 1. , 4 were bonded to produce a comparative multilayer plate-like heat insulating material having a cross section similar to that shown in FIG. The peel strength of this comparative multilayer plate-shaped heat insulating material was measured and found to be as follows. In the case of (1), the inner member 3 and the surface material 2 are 0.008 kgf / c.
a m ^2, 0.006kgf inside member 3 and the back member 4 /
cm ² . In the case of (2), both the inner member 3 and the front surface member 2 and the inner member 3 and the back surface member 4 have 0.004 kgf.
/ Cm ² . As described above, the comparative multilayer plate-like heat insulating material has too low peel adhesion strength between the front and back members 2 and 4 and the inner member 3, so that when this heat insulating material is applied to a building, the front and back surfaces thereof are used. The material was peeled off, or the backing material was deformed due to humidity during storage, and the backing material 4 and the inner member 3 were peeled off, which was not practical as a heat insulating material.

COMPARATIVE EXAMPLE 2 A polystyrene foam was used as an inner member, and a hot-melt type adhesive 5 (a coating amount of 150 g / m ² ) was applied on the entire surface of the inner member 3, neither continuous nor intermittent, A comparative multilayer plate-shaped heat insulating material was manufactured in the same manner as (1) of Example 1 except that the heat treatment was performed. The adhesive application density of the inner member 3 at this time is 100% (c
m ² / cm ² ).

The comparative multi-layer plate-like heat insulating material has a high peel adhesion strength between the front and back members 2 and 4 and the inner member 3, and when this heat insulating material is applied to a building, the front and back surfaces are required. Although there was no peeling between the members 2 and 4 and the inner member 3 and the workability was good, even if it was attempted to separate the front and back members 2 and 4 from the inner member 3 in the manner shown in FIG. Since the peeling adhesive strength between the front and back members 2 and 4 and the inner member 3 is too high (far exceeding 3.0 kgf / cm ² ), they cannot be separated beautifully, and the front and back members ² and 4 side It was confirmed that the inner member 3 was left in a broken state.

[0037]

According to the present invention, the multi-layer plate-shaped heat insulating material has a peeling adhesive strength between the face material and the inner member which is such that the face material and the inner member do not peel off during construction on a building. The strength is determined to be not more than the strength at which peeling of the face member and the inner member becomes difficult. For this reason, the multi-layer plate-shaped heat insulating material of the present invention does not cause any problem during construction of a building and during use as a heat insulating material, and cut loss or broken material generated at the time of construction, waste material generated at the time of dismantling a building. The face material and the inner member can be easily peeled off without requiring any special device or technique, so that they can be separated and collected, and the recyclability is excellent.

[Brief description of the drawings]

FIG. 1 shows an adhesive applied to an inner member of a multilayer plate-shaped heat insulating material of the present invention.
It is a top view showing the state where it applied in linear (a) or dot (b).

FIG. 2 is a cross-sectional view showing a state in which the front and back surface materials and the inner member of the multilayer plate-shaped heat insulating material of the present invention are bonded in a linear or dot shape.

FIG. 3 is a view showing an operation state when a surface material and an inner member of the multilayer plate-shaped heat insulating material of the present invention are separated.

FIG. 4 is a cross-sectional view showing a state in which the surface material and the inner member of the multilayer plate-shaped heat insulating material of the present invention are adhered in a linear or dot shape, and the back surface material and the inner member are adhered over the entire surface.

FIG. 5 is a plan view showing a state in which a different type of adhesive is linearly applied to an inner member of the multilayer plate-shaped heat insulating material of the present invention.

FIG. 6 shows the surface material of the multi-layer plate-shaped heat insulating material of the present invention and FIGS.
FIGS. 7A and 7B are a plan view and a cross-sectional view showing a state in which an internal member different from that shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multilayer plate-shaped heat insulating material 2 Surface material 3 Inner member 4 Back material 5 Hot melt adhesive 6 Other adhesives A, B Workers

Continued on front page F-term (reference) 2E001 DD01 GA22 GA23 HA03 HA21 HA32 HA33 HB01 HB02 HB03 HB04 HB05 HC02 HC07 HC11 HD01 HD02 HD03 HD08 HD09 HD11 HE02 LA04 4F100 AB02 AK51 AK68G AT00A AT00B AT00C BA02 BA03 BA06 BA10ABA GBC JJ02 JK06 JK06A JK06B JK06C JL00 JL14 YY00A YY00B YY00C

Claims (2)

[Claims] 1. A multi-layer plate-shaped heat insulating material in which an inner member and a surface material and / or a back surface material are bonded at an interface therebetween, wherein the bonding strength between the inner member and the surface material, and / or the inside The bond strength between the material and the backing material is 0.01 to
A multilayer plate-shaped heat insulating material having a weight of 3.0 kgf / cm ² . 2. The method according to claim 1, wherein the inner member and the front surface material and / or the back surface material are linear or / and dot-shaped by using a hot-melt adhesive or a combination of the hot-melt adhesive and another adhesive. The multi-layer plate-shaped heat insulating material according to claim 1, wherein the heat insulating material is bonded.