JPH0327143Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a base material that has various functions required for roofing materials, such as waterproofing, moisture proofing, dew proofing, sealing properties for nails used to fix roofing materials, and durability over time. It is a three-layered sheet material that creates a synergistic composite effect by laminating materials together.It also improves the slip resistance of the sheet surface, which is an essential element for roofing base materials, and increases the safety of installation work. The object of the present invention is to provide a waterproof sheet for roof base materials that has extremely multifaceted functions.

BACKGROUND OF THE INVENTION Conventionally, sheet-like products made of paper or nonwoven fabrics impregnated with tar pitch, asphalt, etc., are called asphalt felt or asphalt roofing and are used as materials for roofing substrates. Although these products have problems in terms of durability, waterproofness, etc., they are widely used due to their economic advantages.

In addition, in recent years, the use of synthetic resin products has been researched, and sheets of polyvinyl chloride and films of polyolefin resin can be used alone or with paper or other sheet-like base materials using asphalt or synthetic resin adhesives. Products that are laminated and laminated with intervening materials are attracting attention. For these, the purpose of improving slippage is because the sheet or film surface is smooth.
Safety measures are taken to ensure the safety of the installation work by adding unevenness in advance through a molding process such as embossing, or by applying a paint with high frictional resistance.

Therefore, the present invention forms raised irregular and discontinuous wrinkles on the film, and the surface of the sheet that comes into contact with the sole of the shoe worn by the worker during the sheet installation work is covered with the raised wrinkles. To provide a waterproof sheet for a roof base, which prevents slipping because it is a part and exhibits the anti-slip effect without performing secondary treatment on the film.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of the same, and FIG. 2 is a surface view of the same.
Alternatively, it may be a polypropylene film or a vinyl chloride film with metal vapor deposition on one side, or a heat-shrinkable synthetic resin film with coating or printing on the surface.

2 is a heat-melting waterproof layer mainly composed of asphalt, as long as it melts at 70 to 200°C and exhibits fluidity. A mixture containing a plasticizer is used.

Reference numeral 3 denotes a sheet-like carrier made of paper web or the like, and this sheet-like carrier 3 includes kraft paper, processed paper, thin cloth, and the like.

On the above sheet-like carrier 1, a thickness of 70 to 200℃ is applied.
After providing a 0.4 mm waterproof layer 2, when a heat-shrinkable synthetic resin film 3 is closely attached on top of it, the waterproof layer 2
The film 3 contracts due to the heat, and wrinkles 4 are formed in an irregular shape. When this wrinkle occurs, the waterproof layer 2 also flows following the film 3, so the waterproof layer 2 is filled on the inside of the wrinkle, and the waterproof layer 2 is formed between the sheet-like carrier 1 and the film 3 integrally with the upper and lower surfaces. Closely attached.

Furthermore, by using a sheet obtained by subjecting the thermoplastic synthetic resin film 3 to a metal vapor deposition treatment such as aluminum, a radiant heat insulation effect is added and an excellent waterproof sheet can be obtained.

As mentioned above, the waterproof sheet for roof bases of the present invention differs from those that are mechanically textured by embossing, etc., and wrinkles can be formed by simply adhering the film to the molten asphalt waterproof layer, so there is no need for an embossing device. It is easy to produce, as irregularly shaped wrinkles can be formed extremely easily through heat shrinkage.
In addition, the irregularly shaped wrinkles prevent workers from slipping in any direction, and the inner surface of the wrinkles is filled with an asphalt waterproof layer.
The wrinkles will not collapse or the film will tear, and therefore the anti-slip performance and waterproof properties will not deteriorate.Furthermore, since the asphalt waterproof layer is covered with a resin film, asphalt will not be damaged by contact with the outside air. There is no deterioration and the waterproof effect can be maintained for a long time.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view thereof, and FIG. 2 is a surface view thereof. 1...Sheet-like carrier, 2...Thermofusible waterproof layer, 3...Synthetic resin film.

Claims (1)

[Claims for Utility Model Registration] A heat-shrinkable synthetic resin film is closely adhered to the surface of a sheet-like carrier made of paper web or the like via a heat-melting waterproof layer mainly composed of asphalt. A waterproof sheet for a roof base, characterized in that a synthetic resin film has a large number of irregularly shaped wrinkles, and the inside of the wrinkles is filled with an asphalt waterproof layer without any gaps. A waterproof sheet for a roof base according to claim 1, wherein the heat-shrinkable synthetic resin film is vapor-deposited with a metal such as aluminum.