JPH07314596A - Insulation cushioning material - Google Patents

Abstract

PURPOSE:To develop neither elongation at application, nor gap between heat- insulating buffering materials at pasting by a method wherein synthetic resin threadlike bodies are bonded to the surface of foamed sheet as warp and woof. CONSTITUTION:On one side of electron radiation crosslinked polyethylene foam having the expansion ratio of about 30,000%, the thickness of about 4mm and the breadth of about 1,100mm as foam sheet 1, non-woven fabric, which is produced through lamination under the condition that warp and woof made of synthetic resin threadlike bodies 21 and 22 cross normal to each other, or thermal adhesion type non-woven fabric about 1,100mm wide, both the warp 21 and woof 22 of which are made of high density polyethylene flat yarn having the breadth of about 2mm, the fineness of about 300de, the thread count of about 3 threads per inch and the areal projection percentage of 42, is placed. Next, the resultant laminates are pinched between hot press rolls, both of which are heated up to about 130 deg.C, so as to obtain the desired heat-insulating buffering material 3.

Description

Detailed Description of the Invention

The present invention relates to a heat insulating cushioning material. More specifically, the present invention relates to a heat insulating cushioning material suitable for waterproof construction applications such as civil engineering and construction.

[0002]

2. Description of the Related Art Polyolefin resin such as polyethylene or polypropylene, natural rubber, or synthetic rubber is used as a heat insulating cushioning material for waterproofing work in the field of civil engineering and construction, and its volume is increased by 10 to 40 times. It is well known that foamed foams are used. These foams are attached to the upper and / or lower surfaces of the rubber or plastic sheet forming the waterproof layer with an adhesive, and further various finishing works are performed to perform heat insulating and waterproofing work on the floor to be treated. Of. In each step of the above construction, an adhesive is applied to the foam sheet, or the foam sheet is spread over a wide area on the surface coated with the adhesive. When affixing with a rubber sheet forming a layer, the width shrinks due to the tension applied to the foam sheet, and a part where the foam layer is not partially formed is generated,
Usually, it is corrected, but if this is overlooked, there is a risk of causing poor insulation.

[0003]

SUMMARY OF THE INVENTION The present invention overcomes the above-mentioned drawbacks of the prior art, has sufficient heat insulation performance, follows the irregularities of the floor surface to be treated, and is insulated by changes in tension and dimensions during construction. An object is to provide a heat insulating cushioning material that does not cause a defective portion.

[0004]

The heat insulating cushioning material of the present invention comprises:
A heat insulating cushioning material is characterized in that a synthetic resin filamentous material is adhered to the surface of a foamed sheet as a warp and a weft.

The synthetic resin filamentous material used in the present invention is made of a synthetic resin such as a polyolefin resin such as polyethylene and polypropylene, a polyamide resin, a polyester resin, a polyvinyl alcohol resin or the like, and is appropriately selected from these raw materials. Slit the formed film into a string,
A so-called flat yarn that has been stretched is preferably used.

The fineness of the synthetic resin filamentous material is 100 to
1,500 denier, preferably 150-500 denier
Are used. When the synthetic resin filamentous material is attached, the projected area ratio of the synthetic resin filamentous material to the foam is from 10 to 10.
About 70% is preferable. If it is less than 10%, it is unsuitable because it causes elongation due to the expansion stress at the time of construction, 70%
If it exceeds, the heat insulating cushioning material will have high rigidity as a whole,
It may not be possible to follow the irregularities of the foundation to be constructed, and it may be necessary to make a slight meander when attaching at the time of construction, but this causes a problem that it can only be attached in a straight line at the time of attachment. Also, its fineness is 100 deniers.
If the area ratio is less than 1, the projected area ratio on the surface of the foam sheet is small, it is not possible to prevent changes in tension and dimensions during construction,
In addition, if the above effects are to be achieved, the projected area ratio of the foam sheet on the surface must be increased, resulting in an increase in cost. On the other hand, when it exceeds 1,500 denier, the rigidity of the laminate adhered to the surface of the foam sheet becomes too strong, making it difficult to follow the irregularities of the surface of the floor to be treated during construction, and meandering. Therefore, it becomes difficult to attach the stretched synthetic resin film laminate sheet without causing wrinkles and undulations.

The synthetic resin filaments may be directly adhered to the foam sheet by a warp or weft conveyor which arranges a plurality of filaments at regular intervals.
A woven fabric or a sheet obtained by supplying a plurality of warp yarns at a constant interval, and simultaneously supplying a plurality of weft yarns at a constant interval while spraying a hot melt adhesive thereto and adhering them.
The sheet may be preformed and then adhered to the foam sheet. The method for adhering the synthetic resin filamentous material to the foam sheet is not particularly limited, but for example, the heat adhering method is preferably used because the process is simple.

The foam sheet used in the present invention includes polyolefin resins such as polyethylene and polypropylene, polyvinyl chloride resins, styrene-butadiene copolymers, styrene-butadiene-acrylonitrile copolymers and other styrene resins, Various foaming agents are selected from synthetic resins such as natural rubber, natural rubber, synthetic rubber, etc.
10 to 40 times, preferably 10 to 30 depending on the foaming method
What is double-expanded is preferably used. In particular, the foamed sheet made of polyolefin resin such as polyethylene and polypropylene partially cross-linked in the molecule by electron beam irradiation treatment, etc., has fine bubbles uniformly dispersed and is extremely flexible. In addition, since it has a sufficient surface strength, it has high heat insulating properties and cushioning properties, and is therefore preferably used.

The thickness of the foam sheet varies depending on the purpose of use, environment of use, etc., but is preferably 2 to 20 mm, preferably 4 to 10 mm.
If the thickness is less than 2 mm, the heat insulation performance is not sufficient,
If the thickness exceeds, the workability will deteriorate.

[0010]

Since the heat insulating cushioning material of the present invention uses the foam sheet, it has sufficient heat insulating performance and the synthetic resin filamentous material is adhered to the surface as warp and weft threads.
Does not expand due to tension, and does not create a gap when the heat insulating cushioning material is spread. Also, the projected area ratio of the filamentous material is 10 to 7
When the content is 0%, it does not elongate because it has an appropriate rigidity, and it can be slightly meandered at the time of sticking or having fine irregularities on the floor surface. That is, dimensional changes due to tension and temperature during construction can be reduced without sacrificing the excellent heat insulating cushioning performance of the foam sheet.

[0011]

Embodiments of the present invention will be specifically described below with reference to the drawings, but the present invention is not limited thereto. (Example) As the foam sheet 1, an electron beam cross-linked polyethylene foam sheet (manufactured by Sekisui Chemical Co., Ltd., Softlon HT)
3004; foaming ratio 30 times, thickness 4 mm, width 1,100
mm) on one surface, a cross-woven cloth 2 made of synthetic resin filaments 21 and 22 (made by Sekisui Chemical Co., Ltd., Sof HM3
3; for both warp yarn 21 and weft yarn 22, flat yarn made of high-density polyethylene, width 2 mm, 300 denier, number of hammerings = 3 yarns / inch, area projection ratio about 42%, heat-bonding type nonwoven fabric, width 1,100 mm) Were piled up and sandwiched by a thermocompression-bonding roll having a surface temperature of 130 ° C. to bond them to obtain a heat insulating cushioning material 3.

Using the obtained heat insulating cushioning material 3, a roof heat insulating and waterproofing work for a non-walking roof was carried out. First, a leveling mortar layer 5 is provided to adjust the unevenness of the roof floor 4, and then a waterproof sheet 7 made of vulcanized rubber having a thickness of 2.5 mm is formed on the leveling mortar layer 5 with an adhesive. Bond at layer 6 and then
The heat insulating cushioning material 3 of the present invention is used to form an adhesive layer 8 so that the bonded surface of the cross-latitude cross-woven nonwoven fabric 2 overlaps the waterproof sheet 7.
Glued in. Finally, a finishing gravel layer was provided to complete the process. When the heat insulating cushioning material 3 of the present invention is pasted on the waterproof sheet 7 via the adhesive layer 8, the heat insulating cushioning material 3 has a maximum length of 3 mm per 10 m of construction length ( 0.
Although it contracted, there was no deviation from the reference line of the cross that marks the center of the floor surface during construction due to the tarmi that occurred, and it was possible to paste it completely with no gap with the adjacent heat insulating cushioning material. . Further, during the above-mentioned construction, it is possible to follow even slight irregularities on the sticking surface, and even in the bent portion, the heat insulating cushioning material can be made to meander in accordance with the bent portion, etc.
The workability was extremely good.

(Comparative Example) An electron beam crosslinked polyethylene foam sheet (manufactured by Sekisui Chemical Co., Ltd., Softlon HT3004; foaming ratio 30 times, thickness 4 mm, width 1,100 mm) was used as a heat insulating cushioning material. Similar to the example, the roof insulation and waterproofing work for the non-walking roof was performed. When the heat insulating cushioning material is attached to the waterproof sheet 7 via the adhesive layer, the dimension change in the width direction of the heat insulating cushioning material is 10 mm (0.91%) contraction per 10 m of construction length. However, due to this, there was a deviation from the reference line due to talumi or the like, and the gap of 10 mm was formed between the adjacent heat insulating cushioning materials.

[0014]

EFFECTS OF THE INVENTION Since the heat insulating cushioning material of the present invention does not stretch during construction, a gap between the heat insulating cushioning materials at the time of attachment is not opened, and heat insulating construction can be reliably performed. The projected area ratio of the warp and weft of the synthetic resin filamentous material adhered to the surface of the foamed sheet is 1
In the case of 0 to 70%, the workability is good and the heat insulation property is good because it can follow the irregularities of the floor surface to be processed and can be attached by slightly bending.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an example of a heat insulating cushioning material of the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is an explanatory view showing a situation where roof heat insulating and waterproofing work for a non-walking roof is carried out using the heat insulating cushioning material of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foamed sheet 2 Graft cross-woven non-woven fabric 21 Warp 22 Weft 3 Heat-insulating cushioning material 4 Roof floor 5 Leveling mortar layer 6 Adhesive layer 7 Waterproof sheet 8 Adhesive layer 9 Gravel

Claims (1)

[Claims] 1. A heat insulating cushioning material, wherein synthetic resin filaments are adhered as warp and weft to the surface of a foamed sheet.