JPS5828326A - Loosely woven sheet for agriculture, forestry, civil engineering and construction use capable of high-frequency seam-welding, its welding part and usage thereof - Google Patents

Abstract

PURPOSE:To rigidly and efficiently seam-weld the titled sheets adjoining each other for agriculture, forestry, civil engineering and construction by a high- frequency radio wave with a thin piece having high frequency fusible bondability being interposed thereon. CONSTITUTION:Yarns or strings which have no high-frequency fusible bondability are arranged as warp and weft and are woven, thereby forming a sheet being relatively loose in meshwise. This sheet is immersed in polymer solution having high-frequency fusible bondability, and is then dried, thereby preparing a high frequency seamable sheet. Said sheet 11 and an adjoining sheet 12 of the same type are seamed by a high frequency radio wave on the upper surface of a thin fabric piece 10 having high frequency fusible bondability. In this manner, a product have large strength at the seamed part.

Description

[Detailed description of the invention] The present invention provides a windbreak net, a curing sheet, or a ghoul canopy.
Sheets for suite facilities such as Tennis Two 1m light sheet,
The present invention relates to a joint of a coarse agricultural, forestry, civil engineering, and construction sheet that can be highly effectively sewn using high-frequency stitches when used as a painting sheet, etc., and a method for using the joint.

Traditionally, mesh-like molded products are made from vinyl chloride resin, vinylidene chloride resin, etc. in order to create windbreak nets, curing sheets, sheets for entertainment facilities, etc. by connecting one sheet-like material with a rough opening one after another. Alternatively, the constituent threads have been previously coated with vinyl chloride resin or the like and woven into a relatively coarse mesh fabric.

However, in the case of the above-mentioned vinyl chloride resin molded products, when one piece is joined together to form a wide and long structure, the constituent threads melt during high-frequency stitching, making the joint fragile and prone to being rubbed by wind, etc. If the fiber is sewn, it is easily damaged, and therefore the overall strength is low and it is difficult to achieve the desired purpose.Furthermore, although vinylidene chloride itself is a strong fiber, it easily melts when using high-frequency sutures. It is almost impossible to join them because they melt, and therefore the joining has to be done by other means such as sewing with a sewing machine, which is not suitable because the strength of the joining part is low and the work is cumbersome. In addition, when each thread is coated with resin, the surface friction of the thread is large during weaving, making mechanical weaving extremely difficult and requiring the selection of a special loom.
This was a practical obstacle. In addition, the overall weight was too high, causing the threads to slip and fall out easily, and the overlapping parts of the weft and warp were extremely uneven, and the finish was hard and inconvenient to handle.

Furthermore, even when considering the case of joining, there are many problems in joining unit sheets having a mesh into a wide and vertically elongated sheet.

Currently, when the sheet is made of monofilament, such as an insect repellent net, the required length and width are determined in advance, so there are almost no problems with joining, and the sheet is relatively hard. Things like cheesecloth are connected by machine sewing or resin adhesive, but the number of connected pieces is small and there are still
Since the strength of the joints was not so demanding, almost no problems occurred. However, in the case of mesh-like sheets that have a large number of connections and require high strength at the joints, such as the sorting for agriculture, forestry, civil engineering, and construction that is the subject of the present invention, it is difficult to join the sheets. Even if ordinary sewing, gluing, or other known joining methods are applied, it is not possible to provide the required performance to a structure formed as a continuous object, and there is a strong demand for the emergence of a more effective joining method. This is what I used to do.

The present invention was made in view of the above circumstances, and a coarse sheet for agricultural, forestry, civil engineering and construction was selected from among those that do not have the drawbacks of conventional products and can be sewn at high frequency. That is, the sheet is a relatively coarse sheet made by knitting and weaving threads that do not have high-frequency weldability, and a polymer that has high-frequency weldability is attached to the sheet to enable high-frequency suturing. These mesh sheets are connected and joined in a wide and/or vertical manner to form a structure, but in order to join such mesh sheets most firmly and efficiently, the present invention separately uses thin pieces that have high frequency welding properties. However, by this method, the strength of the joint is reinforced and significantly increased, and the width and length of the structure is very large. It has been confirmed that this is extremely effective in providing sufficient strength to withstand use.

There are various embodiments of the joining method according to the present invention, but among them, the one that is particularly effective is a film made of a polymer or a base fabric coated with a polymer, and this polymer is Most preferably, the polymer is the same as the polymer to be applied to the sheet.

B. The intervening thin piece is sewn onto one of its upper surfaces.At the same time, the ears of I) are sewn onto the other side of the same upper surface of the same thin piece, so that both sheets are sewn together. This is the method of joining. At this time, the lower surface may be covered with a thin piece.

C6 Also, a method in which both sheets are joined with the thin piece interposed, such that the sheet ■ is sewn to the upper surface of the thin piece at its ears, and the sheet ■ is sewn to the lower surface of the thin piece at its ears. be.

In this manner, the sheets according to the present invention are bonded to each other by the interposition of thin pieces having high frequency weldability.

When such a thin piece is interposed, the mesh at the bonded portion of the sheet is completely buried in the thin piece, and the edge of the sheet and the thin piece are completely bonded, resulting in extremely high bonding strength. In particular, in this case, both the sheet and the thin piece have high-frequency weldability, and are preferably made of the same type of polymer, so that the high-frequency seamability can be maximized, which is effective.

To produce the sheet according to the present invention, first, a mesh sheet is knitted and woven using yarns that do not have high-frequency fusing properties, such as yarns made of natural fibers, synthetic fibers, or inorganic fibers. The yarn material may be spun yarn, filament yarn, streak lift yarn, tape-like yarn, or any other yarn, and is not particularly limited. however,
The tension and weight of the fabric are filament yarns such as vinylon.

These threads are formed into sheets by plain weaving, leno weaving, leno weaving, and other known knitting and weaving. The size of the sheet is 15 mm x 15 + m if the eyes are square.
That is, it is preferably less than 0 square 225 wn2, and particularly preferably -) to 10 cm square.

A polymer having high single frequency welding properties is then applied to this sheet. As this polymer, polyvinyl chloride, urethane resin, ethylene-vinyl acetate and other resins are used, and polyvinyl chloride is particularly used. This does not prevent the deposition of larger amounts of polymer on the peripheral ears to be joined, if desired.

Attachment is accomplished by dipping the sheet in a polymer solution and drying, but other known methods may also be used. Furthermore, appropriate chemicals may be added to impart flame retardant properties and other properties to the polymer.

The characteristic feature of the present invention lies in the joint formed by high-frequency stitching of the sheet thus obtained through a thin piece having high-frequency weldability.

The flakes are made of polymers such as vinyl chloride resin, urethane resin,
A film made of ethylene-vinyl acetate copolymer, noryester resin, etc., or a single polymer thereof is coated on a base fabric such as synthetic fiber or natural fiber, but in this case, the same type of polymer as that attached to the sheet is coated. The most preferred is Also,
When only a film is used, polyester resin is preferable in consideration of rigidity, adhesiveness, etc. In this case, when the edge of the sheet is sewn to the upper surface of the thin layer and the edge of the adjacent sheet is sewn to the other side of the upper surface, the sheets are not directly joined to each other. Good too. That is, the sheets may overlap each other or may be joined at intervals. The ears of the sheet are sewn to the top surface of the thin piece,
Furthermore, when the edges of the sheet adjacent to the lower surface of the thin piece are sewn together, the thin piece is sandwiched between the edges of the two sheets.

Both have excellent joint strength, and the overall strength of the structure made up of many joints is also high.

Hereinafter, the present invention will be explained in detail based on further examples.

Polyester multifilament is arranged in the longitudinal direction,
A sheet with the following structure was obtained.

Thus, this sheet was formed into a plain weave. This sheet was mixed with pvc i (10 parts by weight DQP (plasticizer) 8o stabilizer
The sheet was soaked in a polymer solution having the following composition: 1. antimony oxide (flame retardant), 30. pigment (green), 2. tricrene, 25. It was squeezed and dried to make it dull, and the polymer was sufficiently adhered to the sheet. . As a result, a sheet was obtained in which 100 weight of the polymer was adhered to the sheet.

In order to connect completed unit agricultural, forestry, and civil engineering construction sheets in a wide and vertically long manner, a joint according to the present invention was formed.

First, FIG. 1 shows a thin piece 1 in the form of a thin piece;
C) shows a base fabric 2 coated with a polymer 3.

All of these have good high-frequency suturing properties (B), (
In case C), there is an advantage that the strength of the joint where the base fabric is interposed is stronger.

Next, FIGS. 2(A) and 2(B) show an embodiment of a joint in which a thin piece is interposed. (A) is a thin slice lO
Sheets 11 and 12 are high-frequency stitched to one side and the other side of the upper surface portion 10a, respectively, and both sheets are joined at their edges via thin pieces. In this case, a space may be left between both sheets.

Still, in (B), the sheet 21 is sewn to the upper surface of the thin piece 20 at its ears, and the sheet 22 adjacent to the lower surface thereof is sewn to the upper surface of the thin piece 20.
The ears are sutured. In this case, it is also possible to open the ears. Furthermore, as shown in FIG. 3(C), sheets 31 and 32 may be joined between thin pieces 30 and 30'.

A thin piece shown in Fig. 1 ψ) was used for the joint between the two sheets.

The product was joined in wide and vertical shapes and put into practical tests as windbreak nets, curing sheets, tennis court light-shielding sheets, etc., and good results were obtained in all cases.

[Brief explanation of the drawing]

FIGS. 1(A), 1(B), and (C) are explanatory diagrams showing aspects of the thin section according to the present invention, and FIGS. 2(A), (B)
, (C) is an explanatory diagram showing a joint part. 1... Polymer film, 2... Base fabric, 3... Polymer, 10.20... Thin piece, 11, 12, 21, 22.
...Sheet. Patent applicant Hiraoka Orisen Co., Ltd. Agent Patent attorney Masaaki Kai Figure 1 (A)
Figure 1 (B) Figure 1 (C) Figure 2 (A) Figure 2 (B) Figure 2 (C) 1bu 4, Dai 5, Ne 6, Supplementary

Claims (1)

[Scope of Claims] 11) A polymer having high frequency weldability is attached to a relatively coarse sheet made by knitting and weaving threads that do not have high frequency weldability arranged in the weft and weft directions. A high-frequency stitchable coarse agricultural, forestry, civil engineering and construction sheet formed by high-frequency stitching of a high-frequency stitchable coarse agricultural, forestry, and civil engineering construction sheet and an adjacent sheet of the same type with a thin piece having high-frequency fusion properties interposed therebetween. joint of. (2) The joint portion of a coarse agricultural, forestry, civil engineering and construction sheet according to claim 1, wherein the thin piece is a film made of a polymer or a base fabric covered with a polymer. (3) A patent claim in which the selvedge of the sheet is sewn to one side of the upper surface of the thin piece, and the selvedge of the adjacent sheet is sewn to the other side of the upper surface of the thin piece. The joint portion of the coarse agricultural, forestry, civil engineering and construction sheet according to item 1. (4) The selvedge of the sheet is interposed and sewn to the upper surface of the thin piece, and the selvedge of the adjacent sheet is sewn to the lower surface of the thin piece. Joints of coarse-grained agricultural, forestry, and civil engineering construction sheets. (5) High-frequency stitching according to claim 1, wherein the thin piece is a film made of the same kind of polymer as the polymer to be attached to the sheet, or a thin piece made of a base fabric covering the same kind of polymer. Joints of coarse-grained agricultural, forestry, and civil engineering construction sheets. (6) Coarse mesh that can be high-frequency stitched by attaching a polymer that has high-frequency fusibility to a relatively coarse-grained sheet made by knitting and weaving threads and strips that do not have high-frequency fusibility in the warp and weft directions. A method of using a joint for obtaining a wide and vertically elongated structure by using a joint formed by high-frequency stitching of an agricultural, forestry, civil engineering, and construction sheet and an adjacent sheet of the same type with a thin piece having high-frequency fusing properties interposed therebetween.