JPS588190A - Asphalt roofing by bulky nonwoven fabric - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an asphalt toll using ultra-fine synthetic fibers.
Regarding flying.

Conventionally, asphalt roofing, which is used to waterproof buildings, has used paper fibers in the form of felt, but it was weak and could not withstand the shrinkage and cracks that occur in the underlying concrete. . For this reason, various types of base materials have been developed and synthetic resin fibers have been used. However, asphalt roofing using base materials made of synthetic resin fibers also suffers from shrinkage and cracks that occur in the base concrete. Otherwise, it could not adapt to the repeated movements and broke, and if there was a large difference in temperature, it would crack or melt, making it difficult to achieve G9 weather resistance.

For this reason, when used for waterproofing the rooftops of buildings or flat roofs, and for blocking roads, tunnels, etc., the construction was done by laminating two or three layers, but in this case, it was not only time-consuming but also time-consuming. Therefore, the applicant first developed asphalt roofing using a bulky, thick non-woven fabric as a core material. This is Tokko Akira! ;2-#gOg non-woven fabric made by needle punching of polypropylene long fibers (g~/S denier, qoo-V41rθri/-1
Thickness YON41.7ms Number of needle punches/20/
cJ) was used as the core material, and was manufactured by melting and impregnating it with blown asphalt or crushed asphalt.

It has been proven that this roofing is significantly superior to conventional asphalt roofing in tensile tests, breaking tests, shear cyclic tests, etc., and the development of this roofing allows construction of two or three layers. This asphalt roofing had the revolutionary effect of requiring only one layer of waterproofing, and it omitted the complicated conventional methods and brought about a revolution in the exposed waterproofing method. The tensile strength, that is, the 3% modulus, exceeds the maximum value set by the Japanese Industrial Standards, and there is a difficulty in not being able to reduce the value to 1-5. At present, we are trying to somehow exceed the 3% modulus by laminating layers.

As a result of intensive research on this point, the inventors found that this was because relatively thick fibers were used, which caused mutual loosening of the fibers during the initial elongation.
As a result of producing a raw nonwoven fabric limited to S denier and increasing the number of needle punches and impregnating it with asphalt, the ultrafine fibers are entangled with each other and not only exceeds the 3% modulus according to the Japanese Industrial Standards, but also has a tensile strength as a whole. It also became large,
Not only conventional roofing but also the previously developed roofing which uses bulky non-woven fabric as a core material is superior in terms of strength to the previously disclosed roofing.

Next, to explain the present invention, suitable synthetic fibers are polyester, polypropylene, and vinylon fibers.
The thickness of the thread is IN5 denier, and the asphalt to be impregnated may be blown asphalt, modified asphalt, or rubber asphalt.

Comparing the characteristics of the asphalt roofing of the present invention with conventional asphalt roofing, it is clear from this table that it is compared with the Japanese Industrial Standards (JIS) 3% modulus and other elongation strength values. As shown, the roofing according to the present invention not only sufficiently exceeds the 3% modulus of the JIS standard, but also has a tensile strength of σ at maximum load,
The glass in the attached drawing shows the relationship between tensile strength and elongation, and the one with a large area, ie, tensile product, shown by 11I is suitable as a waterproof material. 0 that can be used effectively
In the figure, the one shown in Figure 1 shows the tensile product in the longitudinal direction,
Figure 2 shows the transverse tensile product. <i> is the case where conventional asphalt roofing is used in one layer, and 1 (
2) shows the case where this roofing is laminated in two layers.

True 3) is a previously disclosed invention developed by the applicant,
←) shows a graph of the product of the present invention.

The following table also shows the basis of the graphs in the accompanying drawings and a table of numerical values.

As shown in the tables and graphs above, the asphalt roofing according to the present invention is much superior to conventional roofing in terms of tensile strength, elongation, and tensile strength, and is also superior in repeated shear tests. It has sufficient effects in the rupture test, and has an amazing effect on single-layer construction using the exposed waterproofing method.

[Brief explanation of the drawing]

Figure 1 is a graph showing a comparison in the vertical direction between the product of the present invention and a conventional product, and Figure 2 is a graph showing a comparison in the horizontal direction. Use in one layer.
(2)...Same as above and used in two layers (3)...
Previously announced roofing (da)...Roofing of the product of the present invention

Claims (1)

[Claims] As 7 Alto roofing made of a -m high ta fabric, which is made of a bulky non-woven fabric made by needle punching in which long fibers of ultra-fine synthetic fibers are randomly intertwined and formed by a needle punch method, and the non-woven fabric is impregnated with asphalt.