Title:
Anti-slip leakproof roofing sailcloth for building
Kind Code:
A1


Abstract:
A roofing sailcloth for a building includes a substrate of woven cloth, anti-slipping material woven to the substrate to increase surface roughness of a face of the substrate, and a leakproof layer bonded to the other face of the substrate. The roofing sailcloth is waterproof and leakproof and has high tensile strength and high tearing strength. Furthermore, the roofing sailcloth has improved anti-slipping effect to allow a worker to walk on the sailcloth safely and easily. Furthermore, the roofing sailcloth is light and allows easy transport to improve constructing efficiency. Furthermore, the roofing sailcloth possesses excellent anti-aging properties.



Inventors:
Gan, Guo Gong (Chengdu City, CN)
Application Number:
11/819774
Publication Date:
04/24/2008
Filing Date:
06/29/2007
Primary Class:
International Classes:
E04D1/28
View Patent Images:
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Primary Examiner:
HIJAZ, OMAR F
Attorney, Agent or Firm:
ROSENBERG, KLEIN & LEE (ELLICOTT CITY, MD, US)
Claims:
What is claimed is:

1. A roofing sailcloth for a building, comprising: a substrate of woven cloth, with the substrate including a first face and a second face opposite to the first face; anti-slipping material woven to the substrate to increase surface roughness of the first face of the substrate; and a leakproof layer bonded to the second face of the substrate.

2. The roofing sailcloth as claimed in claim 1, with the anti-slipping material being woven in at least one of a warp direction and a weft direction of the substrate.

3. The roofing sailcloth as claimed in claim 1, with the anti-slipping material including fibers, yarns, or flat yarns having a napped surface.

4. The roofing sailcloth as claimed in claim 2, with the anti-slipping material including fibers, yarns, or flat yarns having a napped surface.

5. The roofing sailcloth as claimed in claim 1, with the leakproof layer being made of thermoplastic elastomer or plastic material.

6. The roofing sailcloth as claimed in claim 2, with the leakproof layer being made of thermoplastic elastomer or plastic material.

7. The roofing sailcloth as claimed in claim 3, with the leakproof layer being made of thermoplastic elastomer or plastic material.

8. The roofing sailcloth as claimed in claim 4, with the anti-slipping material including fibers, yarns, or flat yarns having a napped surface.

9. The roofing sailcloth as claimed in claim 1, further comprising a plurality of protrusions bonded to or printed on an outer face of the leakproof layer, with the protrusions being made of thermoplastic elastomers and forming an anti-slipping layer.

10. The roofing sailcloth as claimed in claim 2, further comprising a plurality of protrusions bonded to or printed on an outer face of the leakproof layer, with the protrusions being made of thermoplastic elastomers and forming an anti-slipping layer.

11. The roofing sailcloth as claimed in claim 3, further comprising a plurality of protrusions bonded to or printed on an outer face of the leakproof layer, with the protrusions being made of thermoplastic elastomers and forming an anti-slipping layer.

12. The roofing sailcloth as claimed in claim 5, further comprising a plurality of protrusions bonded to or printed on an outer face of the leakproof layer, with the protrusions being made of thermoplastic elastomers and forming an anti-slipping layer.

13. The roofing sailcloth as claimed in claim 1, with a plurality of spaced rows of anti-slipping material being formed on the first face of the substrate and spaced from each other in a weft direction.

14. The roofing sailcloth as claimed in claim 2, with a plurality of spaced rows of anti-slipping material being formed on the first face of the substrate and spaced from each other in a weft direction.

15. The roofing sailcloth as claimed in claim 1, with a plurality of spaced rows of anti-slipping material being formed on the first face of the substrate and spaced from each other in a warp direction.

16. The roofing sailcloth as claimed in claim 13, with a plurality of spaced second rows of anti-slipping material being formed on the first face of the substrate and spaced from each other in a warp direction.

17. The roofing sailcloth as claimed in claim 1, with the woven cloth being woven from polymer strips stretched in a single direction by plainweave or twill weave.

18. The roofing sailcloth as claimed in claim 2, with the woven cloth being woven from polymer strips stretched in a single direction by plainweave or twill weave.

19. The roofing sailcloth as claimed in claim 4, with the woven cloth being woven from polymer strips stretched in a single direction by plainweave or twill weave.

20. The roofing sailcloth as claimed in claim 9, with the woven cloth being woven from polymer strips stretched in a single direction by plainweave or twill weave.

Description:

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to roofing sailcloth for a building and, more particularly, to anti-slip leakproof roofing sailcloth mounted on a roof of a building and including anti-slipping material woven in a warp direction and/or a weft direction during weaving of the sailcloth.

2. Description of the Related Art

To construct a building by wood and/or bricks in a cold zone, a layer of roofing sailcloth is placed on the roof before making the cement roofing or installing roofing tiles made of cement or composite material. The roofing sailcloth allows easy construction and improves leakproofness and temperature-maintaining capability of the resultant building. The roofing sailcloth includes plastic films or woven plastic cloth on two faces thereof. Workers on the roofing sailcloth are liable to slip on the outer faces of the plastic materials (mostly polyethylene or polypropylene). The smooth outer faces of the sailcloth also result in difficulty in making the cement roofing and in installing the roofing tiles.

SUMMARY OF THE INVENTION

An objective of the present invention is to provide roofing sailcloth that is waterproof and leakproof and that has high tensile strength and high tearing strength.

Another objective of the present invention is to provide leakproof anti-slip roofing sailcloth that provides improved anti-slipping effect, allowing a worker to walk on the sailcloth safely and easily.

A further objective of the present invention is to provide roofing sailcloth that is light and that allows easy transport to improve constructing efficiency.

Still another objective of the present invention is to provide roofing sailcloth that possesses excellent anti-aging properties.

A roofing sailcloth for a building according to the preferred teachings of the present invention includes a substrate of woven cloth, with the substrate including a first face and a second face opposite to the first face; anti-slipping material woven to the substrate to increase surface roughness of the first face of the substrate; and a leakproof layer bonded to the second face of the substrate.

In a preferred form, the anti-slipping material is woven in at least one of a warp direction and a weft direction of the substrate. The anti-slipping material includes fibers, yarns, or flat yarns having a napped surface. The leakproof layer is made of thermoplastic elastomer or plastic material. A plurality of protrusions may be bonded to or printed on an outer face of the leakproof layer. The protrusions are made of thermoplastic elastomers and form an anti-slipping layer.

Other objectives, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of roofing sailcloth of a first embodiment in accordance with the present invention, wherein anti-slipping material is woven and spaced in a warp direction.

FIG. 2 is a sectional view of the roofing sailcloth of FIG. 1.

FIG. 3 is a perspective view of roofing sailcloth of a second embodiment in accordance with the present invention, wherein anti-slipping material is woven and spaced in a weft direction.

FIG. 4 is a perspective view of roofing sailcloth of a third embodiment in accordance with the present invention, wherein anti-slipping materials is woven and spaced in both warp direction and weft direction.

FIG. 5 is a perspective view of roofing sailcloth of a fourth embodiment in accordance with the present invention.

FIG. 6 is a sectional view taken along plane A-A of FIG. 5.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIGS. 1 and 2 show roofing sailcloth for a building of a first embodiment in accordance with the present invention. The roofing sailcloth of this embodiment includes a substrate 1 that is a woven cloth woven from polymer strips 2 and 3 stretched in a single direction; namely a weaving machine (such as a flat knitting machine or circular loom) weaves polypropylene by plainweave or twill weave. During weaving, anti-slipping material 4 was woven into the substrate 1 in a warp direction in a spaced manner to increase the surface roughness of the substrate 1 to an extent sufficient to provide anti-slipping effect. The anti-slipping material 4 is sewn to the substrate 1 to form a plurality of spaced rows of anti-slipping material 4 on the upper face of the substrate 1, with the rows of anti-slipping material 4 being spaced in a weft direction. The anti-slipping material 4 is made of a polypropylene fiber whose surface is subjected to napping to provide the required surface roughness. Alternatively, the anti-slipping material 4 may be fibers, yarns or flat yarns with desired anti-slipping effect. The anti-slipping material 4 is soft and water-absorbing and has irregular roughness to increase the surface friction coefficient, preventing workers walking on a sloping roof from slipping on the upper face of the roofing sailcloth. The surface friction properties of the anti-slipping material 4 also increases the bonding effect between the sailcloth and cement applied on the sailcloth. A leakproof layer 5 of thermoplastic elastomer is bonded to the other face of the substrate 1. By applying soft, elastomeric rubber on the other face (bottom face) of the substrate 1, the roofing sailcloth can be bonded to a clean sloping roof of a building without the risk of sliding, allowing fixing of the roofing sailcloth on the roof of the building, with the roofing sailcloth providing a rainproof effect. Alternatively, the leakproof layer 5 is made of plastic material.

FIG. 3 shows roofing sailcloth of a second embodiment in accordance with the present invention. The roofing sailcloth of this embodiment is substantially the same as the first embodiment except that the anti-slipping material 4 is woven and spaced in the weft direction. Namely, the anti-slipping material 4 is sewn to the substrate 1 to form a plurality of spaced rows of anti-slipping material 4 on the upper face of the substrate 1, with the rows of anti-slipping material 4 being spaced in the warp direction.

FIG. 4 shows roofing sailcloth of a third embodiment in accordance with the present invention. The roofing sailcloth of this embodiment is substantially the same as the first embodiment except that the anti-slipping material 4 is woven and spaced in both warp direction and weft direction. Namely, the anti-slipping material 4 is sewn to the substrate 1 to form a plurality of spaced first rows of anti-slipping material 4 and a plurality of spaced second rows of anti-slipping material 4 on the upper face of the substrate 1, with the first rows of anti-slipping material 4 being spaced in the weft direction and with the second rows of anti-slipping material 4 being spaced in the weft direction.

FIGS. 5 and 6 show roofing sailcloth of a fourth embodiment in accordance with the present invention. The roofing sailcloth of this embodiment is substantially the same as the first embodiment except that an anti-slipping layer 7 of thermoplastic elastomer is bonded to the outer face of the leakproof layer 5 by an adhesive layer 8. The outer face of the anti-slipping layer 7 includes a plurality of protrusions 6 (preferably semispherical) to provide anti-slipping effect. The protrusions 6 are uniformly arranged and are soft and elastomeric and made of thermoplastic polyolefin such as polyethylene terephthalate or polyvinyl chloride. Alternatively, the protrusions 6 are formed on the outer face of the leakproof layer 5 by printing.

The roofing sailcloth according to the preferred teachings of the present invention is waterproof and leakproof and has high tensile strength and high tearing strength. Furthermore, the roofing sailcloth according to the preferred teachings of the present invention has improved anti-slipping effect to allow a worker to walk on the sailcloth safely and easily. Furthermore, the roofing sailcloth according to the preferred teachings of the present invention that is light and that allows easy transport to improve constructing efficiency. Furthermore, the roofing sailcloth according to the preferred teachings of the present invention possesses excellent anti-aging properties.

Although specific embodiments have been illustrated and described, numerous modifications and variations are still possible without departing from the teachings of the invention. The scope of the invention is limited by the accompanying claims.