JPH1030280A - Porous waterproofing sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of breakage by forming a reinforcing part in end parts on both sides in the longitudinal direction of a belt-like porous waterproofing sheet formed by bonding nonwoven fabric and air-permeable synthetic resin sheet integrally. SOLUTION: Air-permeable synthetic resin sheet 4 such as polyester sheet is arranged on a top face of nonwoven fabric 3 made of synthetic resin. The nonwoven fabric 3 is folded back on the synthetic resin sheet 4 side over the whole length of a side end part in the longitudinal direction of the nonwoven fabric 3 to form a folded back part 5. Furthermore, the synthetic resin sheet 4 is bonded and integrated with the nonwoven fabric 3 to form a porous waterproofing sheet 1 having a reinforcing part 2. Moreover, a thin and long sheet- like body such as vinyl chloride resin may be provided between the nonwoven fabric 3 and the synthetic resin sheet 4 to form the reinforcing part 2. Furthermore, a thread-like body such as cotton thread may be provided between the nonwoven fabric 3 and the synthetic resin sheet 4 to form the reinforcing part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof and breathable sheet used for a foundation of a wall.

[0002]

2. Description of the Related Art Conventionally, as shown in Japanese Utility Model Laid-Open No. 1-87193 and Japanese Utility Model Laid-Open No. 7-7931, there are known ventilated waterproof sheets.

[0003] As these air-permeable waterproof sheets, those formed by bonding a nonwoven fabric and a synthetic resin sheet are known.

[0004]

However, in this conventional air-permeable waterproof sheet, there is a possibility that tears may occur from the side ends during construction on site.

That is, when the side end portion of the ventilated waterproof sheet comes into contact with the sharp portion during construction, there is a possibility that the sheet may be broken from the side end portion toward the center.

The present invention has been made in view of this point, and an object of the present invention is to provide a ventilated waterproof sheet that is less likely to be torn from a side end.

[0007]

According to a first aspect of the present invention, there is provided a ventilated waterproofing sheet comprising a non-woven fabric and a synthetic resin sheet having air permeability. It is characterized in that reinforcing portions are formed at both ends in the longitudinal direction.

According to a second aspect of the present invention, there is provided the waterproof waterproof sheet according to the first aspect, wherein the reinforcing portion is formed by folding an end portion of the nonwoven fabric toward the synthetic resin sheet. It is characterized by the following.

According to a third aspect of the present invention, there is provided the ventilated waterproof sheet according to the first aspect, wherein the reinforcing portion has a thread-like body or an elongated sheet between the nonwoven fabric and the synthetic resin sheet. It is characterized by being formed with a reinforcing material such as a shape interposed.

According to a fourth aspect of the present invention, there is provided the ventilated waterproof sheet according to the first aspect, wherein the reinforcing portion is formed by compressing the synthetic resin sheet by heat compression to harden. It is characterized by the following.

[0011]

FIG. 1 is an explanatory view of a ventilated waterproof sheet according to one embodiment of the present invention, and FIG. 2 is a sectional view taken along line XX of FIG.

In FIGS. 1 and 2, reference numeral 1 denotes a ventilated waterproof seal.
Reference numeral 2 denotes a reinforcing portion. The air-permeable and waterproof sheet 1 has a belt-like shape, and is shipped as a coil-shaped body and deployed and used on site. This breathable waterproof sheet 1 is made by bonding and bonding a nonwoven fabric 3 and a synthetic resin sheet 4 having air permeability, and a reinforcing portion 2 is formed over the entire length of the longitudinal end. The reinforcing portion 2 folds the nonwoven fabric 3 and the folded portion 5
Is formed. The folded portion 5 is formed by folding the nonwoven fabric 3 toward the synthetic resin sheet 4 side, and the synthetic resin sheet 4 is integrally bonded thereon. The strength of the entire length of the ventilation waterproof sheet 1 in the longitudinal direction is increased by the reinforcing portion 2. The folded portion 5 folds the nonwoven fabric 3 toward the synthetic resin sheet 4 side, and the synthetic resin sheet 4
, The end of the nonwoven fabric 3 is not frayed.

The non-woven fabric 3 is desirably made of a synthetic resin, and the synthetic resin sheet 4 is desirably a polyester sheet.

FIG. 3 is a sectional view of a ventilated waterproof sheet according to another embodiment of the present invention. In FIG. 3, a reinforcing portion 2 is formed by interposing an elongated sheet-like body 6 between a nonwoven fabric 3 and a synthetic resin sheet 4. Slender sheet 6
Is formed of, for example, a vinyl chloride resin sheet.

FIG. 4 is a sectional view of a ventilated waterproof sheet according to still another embodiment of the present invention.

In FIG. 4, the reinforcing portion 2 is formed by interposing a thread 7 between the nonwoven fabric 3 and the synthetic resin sheet 4. The thread 7 is, for example, a cotton thread.

FIG. 5 is a sectional view of a ventilated waterproof sheet according to still another embodiment of the present invention.

In FIG. 5, the reinforcing portion 2 is formed by shrinking the synthetic resin sheet 4 by heat compression as a hardened portion 8.

[0019]

The breathable waterproof sheet according to the present invention is a strip-shaped breathable waterproof sheet in which a nonwoven fabric and a breathable synthetic resin sheet are integrally bonded, and reinforcing portions are provided at both ends in the longitudinal direction. Since it is formed, it is less likely that the tear will occur at the side end.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a ventilated waterproof sheet according to one embodiment of the present invention.

FIG. 2 is a cross-sectional view of the embodiment shown in FIG.

FIG. 3 is a cross-sectional view of a different embodiment of the present invention.

FIG. 4 is a cross-sectional view of yet another embodiment of the present invention.

FIG. 5 is a cross-sectional view of yet another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vent waterproof sheet 2 Reinforcement part 3 Nonwoven fabric 4 Synthetic resin sheet

Claims (4)

[Claims] 1. A band-shaped air-permeable and waterproof sheet in which a nonwoven fabric and a synthetic resin sheet having air-permeability are adhered and integrated, wherein a waterproof and air-permeable sheet having reinforcing portions formed at both longitudinal ends.
G. 2. The breathable waterproof sheet according to claim 1, wherein the reinforcing portion is formed by folding an end portion of the nonwoven fabric toward the synthetic resin sheet. 3. The breathable waterproof sheet according to claim 1, wherein the reinforcing portion is formed by interposing a reinforcing material such as a thread or an elongated sheet between the nonwoven fabric and the synthetic resin sheet. 4. The breathable waterproof sheet according to claim 1, wherein the reinforcing portion is formed by compressing the synthetic resin sheet by heat compression to harden the resin sheet.
G.