JPS609001Y2 - Special laminated sheet - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a special laminated sheet suitable for canvas and the like.

Conventionally, waterproof fabrics used for canopies, tents, etc. have been manufactured by simply weaving cotton or synthetic fibers into a plain weave with a waterproof coating made of vinyl chloride resin, paraffin, etc. on the front and back surfaces. However, recently, filament yarns have been used to achieve lighter weight and higher strength.

However, although waterproof fabrics based on filament fabrics are lightweight and have high strength, they have weak tear strength, and once a hook tear occurs, it rapidly expands.

In order to improve this drawback, a leno-knitted fabric using filaments was used as the base fabric.

It is recognized that the tear strength of this base fabric is improved due to the leno texture, but on the other hand, since the constituent yarns are filaments, the yarn surface is flat and thin, so the resulting knitted fabric has a low density. Disadvantages were observed, such as thinness, relatively low peeling resistance of the coating, poor thickness feeling, and problems with durability in terms of toughness and abrasion resistance.

Utility Model Publication No. 51-5491 proposes the use of a woven fabric with warp and/or weft yarns made of a mixture of continuous fibers of thermoplastic synthetic resin and short fibers as the base fabric for tarpaulins. .

The weft/warp density of this woven fabric is 15 fibers/25.4 mm or more, and the short fiber content is within the range of 5 to 90% based on the weight of the woven fabric.

Since such a base fabric basically has a woven structure, the warp and warp threads of the base fabric are restrained from displacing each other. When a tearing force is applied to this tarpaulin, the warp and warp threads of the base fabric are It was insufficient to absorb and buffer the tear force due to the displacement of the tear force.

In addition, in Utility Model No. 51-107961, chain stitch warp and
It has been proposed to use a knitted fabric in which mutually parallel weft yarns are inserted into a warp knitted structure consisting of warp insertion yarns as a base fabric for coating.

However, when such a base fabric is used for coating, there are the following problems.

(a) Chain knitting warp yarns are braided without bending back and forth,
Since the warp insertion yarns are also inserted into the chain stitch structure while being bent, the size and shape of this base fabric easily change due to tension in the warp direction.

Therefore, in the coating operation, strict control of the tension on the base fabric is required, making the coating process difficult.

(b) The chain stitch warp and warp insertion yarn are independent from the adjacent chain stitch warp and warp insertion yarn, and there is no bond between them.

Therefore, the warp threads and warp insertion threads tend to slip along the weft threads, resulting in non-uniform texture and poor appearance in the base fabric, making the resulting coated product unpractical.

As a result of intensive studies to improve these drawbacks of the prior art, the inventor of the present invention has constructed a base fabric with spun yarns, and has created a braided yarn consisting of spun yarns or filaments (preferably filaments) at the intersections of warp and warp yarns. By intertwining the above-mentioned filament knitted fabrics and forming a flexible resin coating on this base fabric, the filament knitted fabrics have a tear strength equal to or higher than that of conventional waterproof fabrics using the filament knitted fabrics as the base fabrics. This method eliminates the disadvantages of coatings such as peeling resistance, thick feel, and durability, which are found in waterproof fabrics and the like, and provides an extremely useful special laminated sheet.

The present invention mainly relates to a sheet suitable for use as a waterproof fabric or the like that requires strong tear strength.

The special laminated sheet of the present invention is composed of a base fabric and a waterproof coating layer formed on at least one side of the base fabric and made of flexible resin, and the base fabric is mutually Warp yarns made of a large number of spun yarn-containing yarns arranged parallel to each other at intervals and extending in a straight line S; A weft consisting of a large number of spun yarn-containing yarns arranged in parallel to each other and extending in a straight line, intertwined with the warp and weft,
A braided yarn consisting of a large number of spun yarns or filament yarn-containing yarns connected at their intersections, and characterized in that each of the large number of braided yarns is intertwined with adjacent braided yarns. It is.

The base fabric used in the special laminated sheet according to the present invention is not a simple plain weave that was commonly used in Japan, but has a special structure as described above.

This base fabric consists of a large number of warp threads, weft threads, and braided threads, and the warp threads and weft threads are arranged parallel to each other at intervals, and each extends in a straight line S. It is something that exists.

The warp groups and weft groups arranged as described above are overlapped so as to intersect with each other.

The braided yarn intertwines the overlapping warp and weft yarns and joins the warp and weft yarns at their intersections to form an integral fabric.

At this time, each braided thread is intertwined with an adjacent braided thread.

The warp and weft are preferably made of only spun yarn, but may be a twisted yarn of spun yarn and filament yarn.

The braided yarn is formed from spun yarn, filament yarn, aligned yarns thereof, or twisted yarns thereof.

Since the braided yarn is braided without bending and reciprocating, this braided structure has a large degree of freedom to elongate and deform in accordance with tension.

On the other hand, the warp and warp threads are simply overlapped without being interwoven with each other, and these are joined together by the above-mentioned braided structure having a large degree of freedom in elongation and deformation.

Therefore, the warp and warp threads each have a fairly large degree of freedom with respect to their displacement from the other.

However, since each braided yarn is intertwined with adjacent braided yarns, excessive slipping of the warp and weft yarns does not result in non-uniform texture.

A coating layer of flexible resin is formed on one or both sides of the base fabric.

As this flexible resin, polyvinyl chloride resin, acrylic resin, synthetic rubber, or the like can be used.

Any method of coating, adhesion, or impregnation may be used to form the coating layer.

When a tearing force is applied to the special laminated sheet of the present invention, the warp or weft threads first slip, and the intertwined braided threads stretch and absorb the tearing force and buffer it.

Further, when a tearing force is applied, the braided yarn stretches and eventually increases the freedom of displacement of the cut warp or weft, and these actions absorb and buffer the tearing force.

Therefore, the laminated sheet of the present invention can exhibit excellent tear strength as a whole.

Hereinafter, the present invention will be described based on embodiments with reference to the drawings.

FIG. 1 shows a longitudinal section of an example of the special laminated sheet according to the present invention.The waist base fabric 1 is made of warp 2 made of spun yarn, weft 3 made of spun yarn, and their warp and warp. The braided yarn 4 is composed of spun yarn or filament yarn-containing yarn, which are bonded at the yarn intersections.

In this example, the warp and weft yarns are orthogonal to each other, but they are
They may be oblique to each other.

Further, although spun yarn is used for both warp and warp yarns 2 and 3, filament yarn can also be used in combination as long as the effect is not impaired.

Furthermore, the warp and warp yarns may be a blended yarn of two or more different types of fibers.

Furthermore, the yarn used for the braided yarn 4 is preferably finer than the warp and weft yarns.

The braided yarn 4 is used to sequentially braid and connect adjacent intersections of warp and weft yarns.

Each of the braided threads 4 is intertwined with adjacent braided threads to form an integrated braided structure in both warp and weft directions.

Normally, warp and warp threads are each used with a thickness of about 5 to 3 wafts, but each is a single thread, or two or more slightly fine threads pulled together or twisted together. There may be.

Furthermore, although the warp and weft are usually made of the same material, they may be made of different materials.

For example, the warp may be made of polynisterium spun yarn and the weft may be made of polyamide spun yarn, or one of the warp and warp yarns may be made of synthetic fiber spun yarn, and the other may be made of natural fiber spun yarn. can.

There are no particular limitations on the form of mixed use. Next, an example of the texture of the base fabric of the present invention is shown in FIG.

In Fig. 2, the warp threads 2 and the weft threads 3 are crossed by a braided thread 4, which intertwines with the warp threads and the weft threads, and also intertwines with the adjacent braided threads to form a three-piece fabric. There is.

In addition to this structure, braids in ordinary tricot, hexagonal gauze, three-way cross-woven fabrics, and other knitted fabrics can be applied.

In short, any material may be used as long as it reliably connects the intersections of the warp and warp yarns and intertwines with the adjacent braided yarns.

Multifilament yarns are usually used as braided yarns, and polyester multifilament yarns are particularly suitable.

However, it is not limited to this.

Returning to FIG. 1 again, coating layers 5 and 6 made of flexible resin are formed on both sides of the base fabric 1 by coating, adhesion, or impregnation.

The coating layers 5 and 6 are made of polyvinyl chloride resin, acrylic resin, synthetic leather rubber, or other known materials.

The coating layer may be formed only on one side of the base fabric.

Since the special laminated sheet of the present invention is based on the above structure, the resulting laminated sheet will absorb the tearing impact force by elongating or cutting the braided threads no matter which direction tearing force is applied. It is possible to reduce the number by

In addition, since the base fabric Jigumikai is composed of spun yarn,
Although the static tensile strength is lower than that of filament yarn,
It exhibits relatively high buffering properties against dynamic high-speed tearing forces, has excellent tensile strength, and can exhibit surprisingly high tearing strength.

Furthermore, it has excellent abrasion resistance, water leakage resistance, and coating peeling resistance.
It has good thickness, sheet conformability, workability and operability, and can fully achieve the intended purpose of its invention, making it extremely useful when applied to waterproof fabrics, tarpaulins, etc.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an example of a special laminated sheet according to the present invention, and FIG. 2 is a cross-sectional view showing an example of the structure of the base fabric used in the present invention. 1...Base fabric, 2...Warp, 3...
...Weft, 4... Braided thread, 5,6...
Flexible resin coating layer.

Claims (1)

[Claims for Utility Model Registration] A sheet consisting of a base fabric and a waterproof coating layer formed on at least one side of the base fabric and made of a flexible synthetic resin, wherein the base fabric is spaced apart from each other. A warp consisting of a large number of spun yarn-containing threads arranged parallel to each other at a distance S and extending in a straight line S; , and S are linearly extending weft yarns made of a large number of spun yarn-containing yarns, and a large number of weft yarns that are intertwined with the warp and weft yarns and connect the warp yarns and weft yarns at their intersections. A special laminated sheet comprising a braided yarn consisting of a spun yarn or a filament yarn-containing yarn, wherein each of the plurality of braided yarns is intertwined with adjacent braided yarns.