JPH0595734U - Impermeable cloth - Google Patents

Abstract

(57) [Abstract] [Purpose] The purpose of the present invention is as a water-blocking sheet used to prevent leakage of sewage and muddy water during land reclamation work or burial treatment work on the Gulf, and pressure or waste due to sewage, muddy water, etc. An object of the present invention is to provide a water impermeable sheet that is not damaged or torn in part due to impact force at the time of introduction. [Composition] A waterproof sheet which is obtained by laminating a base cloth and a waterproof film, each of which has elongations in the warp and weft directions of 30% or more.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a waterproof sheet. In particular, it relates to a water-impervious sheet used to prevent leakage of sewage and muddy water when reclaiming or burying the Gulf.

[0002]

[Prior Art]

 Conventionally, film-like materials have been generally used as water-blocking sheets used to prevent leaks of sewage and muddy water during land reclamation work or burial treatment work on the Gulf.

However, in the case of a film-like material, a part of the water-blocking sheet may be damaged or torn due to the pressure of sewage, muddy water or the like, or the impact force when the waste is charged. In addition, as geotextiles in the field of bulk civil engineering materials, woven fabrics and short-fiber non-woven fabrics are widely used, and recently, the use of spunbond long-fiber non-woven fabrics has begun to increase. However, the fact that the longitudinal direction and the latitudinal direction are currently used is not taken into consideration.

[0004]

[The purpose of the device]

 The present invention has been made to solve such a problem.

[0005]

[Device configuration]

 That is, the present invention provides a water-impermeable sheet comprising: ((Claim 1) a base cloth and a water-impermeable film, each having a warp-direction and weft-direction elongation of 30% or more.

(Claim 2) The water-permeable sheet according to claim 1, wherein the water-permeable film is a polyvinyl chloride vinyl film fired.

(Claim 3) The waterproof sheet according to claim 1, wherein the water-permeable film has elongations in the warp direction and the weft direction of 30% or more.

(Claim 4) The water impervious sheet according to claim 1 or 2, wherein the base fabric is a laminate containing a long fiber non-woven fabric. It is.

Here, it is preferable to use a non-woven fabric as the base fabric having elongations of 30% or more in both the warp direction and the weft direction. A long fiber nonwoven fabric or a short fiber nonwoven fabric may be used, but it is particularly preferable to use a long fiber nonwoven fabric. A composite of a long fiber nonwoven fabric and a short fiber nonwoven fabric is particularly preferable. Ordinary woven fabric or knitted fabric may be used, but it is necessary to use a special elastic thread because it is difficult to obtain a suitable fabric with synthetic fibers having ordinary physical properties. For example, it is necessary to use polyurethane fibers, elastic polyester fibers, and polyolefin elastic fibers.

The elongation of the base fabric must be 30% or more in both the warp direction and the weft direction. If the elongation of the base fabric is less than 30% in the longitudinal or weft direction, the force cannot be relieved when subjected to the pressure of sewage, muddy water, etc. or the impact force of waste input. However, it may be damaged and is not sufficient as a water barrier sheet.

As the water-blocking film, an unstretched film such as polyolefin, polyvinyl chloride vinyl chloride, polyvinylidene chloride chloride or the like, or an appropriately expanded polyvinyl chloride film or a polyurethane foam film is used.

In the present invention, a base cloth and a waterproof film, which have elongations in the warp direction and the weft direction of 30% or more, are laminated. The method of lamination is based on the adhesive method. Generally, the adhesive method is based on the chemical binder. However, in the present invention, in order to make the adhesion particularly easy and to maintain the strength and the elongation, the upper surface of the non-woven fabric is bonded. Polyvinyl chloride film containing a foaming agent was placed on it, and it was melted and bonded simultaneously with the film firing through a dryer box equipped with a far infrared heater. Conditionally, control is performed by the speed of the non-woven fabric, the output of the far infrared heater and the distance between the polyvinyl chloride vinyl film surface. The firing ratio of the polyvinyl chloride film is preferably in the range of 3 to 10 times. Whichever method is used, it is necessary to perform lamination so as not to impair the elongation property of 30% or more.

The water-blocking sheet of the present invention will be described below with reference to the drawings. 1 to 3 each show an example of the waterproof sheet of the present invention. 1 is a foamed polyvinyl chloride film, 2 is a long-fiber non-woven fabric, 3 is a short-fiber non-woven fabric, and 4 is a composite non-woven fabric in which a long-fiber non-woven fabric and a short-fiber non-woven fabric are integrated.

[0014]

[Effect of the device]

 The water-impermeable sheet of the present invention can be used for a long period of time without being damaged or torn by a part of the water-impermeable sheet due to the pressure of sewage, muddy water, or the impact force when throwing waste. it can.

[Brief description of drawings]

[Figure 1] Side view of the water-blocking sheet

FIG. 2 is a side view of another embodiment of the waterproof sheet.

FIG. 3 is a side view of another embodiment of the waterproof sheet.

[Explanation of symbols]

 1 Foamed Polyvinyl Vinyl Film 2 Long Fiber Nonwoven Fabric 3 3 Short Fiber Nonwoven Loop 4 Integrated Composite Nonwoven Fabric of Long Fiber Nonwoven Fabric

Claims (4)

[Scope of utility model registration request] 1. The elongations in the warp direction and the weft direction are both 30.
% Of a base cloth and a water-blocking film are laminated, and a water-blocking sheet. 2. The water-blocking sheet according to claim 1, wherein the water-blocking film is a fired polyvinyl vinyl chloride film. 3. The water-permeable sheet according to claim 1, wherein the water-permeable film has elongations in the warp direction and the weft direction of 30% or more. 4. The waterproof sheet according to claim 1, wherein the base fabric is a laminate containing a long-fiber nonwoven fabric.