JPS5833631A - High-frequency-seamable large meshed sheet for agricultural and construction work - Google Patents

Abstract

PURPOSE:To increase the bonding strength of sheets by high-frequency seaming by bonding a polymer having a high-frequency fusing property to a sheet consisting of strands having no high-frequency fusing property so as to sufficiently increase the strength of the core portion without melting. CONSTITUTION:A comparatively large meshed sheet, obtained by knitting and braiding strands having no high-frequency fusing property, is bonded with a polymer having high-frequency fusing property to form a high-frequency-seamable large meshed sheet. In this case, the sheet is pulled in the advancing direction 14 by holding its both edges 11 and 12 in such a way that its center 13 moves behind both edges 11 and 12, and the strands are arranged circularly in vertical or sidewide direction. These sheets 1 and 2 are bonded with each other at their selvadges to obtain sheets having a great bonding strength and a great tortional strength and having suitability for structures.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a coarse-grained agricultural and forestry structure in which unit sheets having coarse grains, such as windbreak nets, curing sheets, sheets for various recreational facilities, and sheets for painting, are joined together adjacently to form a wide and vertically elongated structure. Concerning sheets for civil engineering and construction.

Conventionally, in order to create a 'ftti structure that can be used for the above purpose by connecting coarse sheet materials one after another, it is necessary to use a mesh-like molded material such as vinyl chloride resin or vinylidene chloride resin, or to apply vinyl chloride to the entire circumference of the yarn in advance. A yarn coated with a resin or the like was woven into a fabric having a relatively coarse mesh.

However, in the case of the above-mentioned vinyl chloride resin molded products, -
When high-frequency suturing is used to join paraboloids together to create a wide and vertical structure, the constituent threads easily melt, resulting in brittle and sharp joints, which can cause lacerations due to strong winds, etc., especially when used as structures. The overall strength of the line was reduced and it was not possible to achieve the desired purpose. In addition, vinylidene chloride IJj is itself a strong fiber, but
Since high-frequency suturing is almost impossible, joining requires steps such as sewing with a sewing machine or adhesive, and even in this case, the strength of the joining surface is not sufficient and the work is difficult. There were other drawbacks.

The present invention eliminates each of the above-mentioned drawbacks, maintains sufficient strength as a structure without melting the core at all even with high-frequency welding, and provides agricultural, forestry, and civil engineering architecture that has high joint strength by high-frequency sutures. This is a sheet with relatively coarse mesh, which is made by weaving and arranging filaments that do not have high frequency welding properties in the weft and weft directions. It is made by adhering a polymer having high-frequency fusion properties, and can provide a sheet with excellent properties for forming long structures.

Furthermore, the joining of this sheet with the adjacent sheet has been thoroughly inspected.''・1 However, the present invention has a structure in which the joining can be made strongly and reliably by threading the threads so as to form an arc shape in one direction. When objects are arranged and the edges of both sheets are overlapped and high-frequency stitching is performed, the degree of intersection at the edges of both sheets is set to dog, and so-called curved point contact is used to provide torsional resistance to the tearing force acting on the joint surface. This method was found to be the most effective method for high-frequency stitching of mesh sheets, leading to the present invention.

The yarn material that does not have high-frequency fusion properties according to the present invention includes, for example, natural fibers, synthetic fibers, or inorganic fibers, but for the purposes of the present invention, synthetic fibers, particularly 4? Filament yarns such as lyester or vinylon are preferred. However, other spun yarns, splint yarns, tape-like yarns, etc. or any other yarns can also be used. These threads may be knitted or woven in any manner, but plain weave is the most common, and special fabrics such as leno weave and leno weave can also be used. Depending on the mesh size of the sheet, a polymer having high frequency weldability is attached to the sheet, and this polymer may include polyvinyl chloride, urethane resin, ethylene-vinyl acetate copolymer, and other materials. good. Especially the moon? A material mainly composed of vinyl chloride is preferred. The polymerization is achieved by immersing and drying the sheet in a knitting solution, but other known methods may be used as long as it does not contradict the purpose of the present invention. Appropriate agents can be added to the polymer to impart anti-inflammatory properties (5) and other properties.

A further important feature of the present invention is that the threads arranged in the warp or weft direction are arranged in an arc shape with respect to the weft or warp direction, respectively, to form a coarse mesh.

For example, in the case of a sheet having a width of 2 m, the weft yarns are preferably arranged in an arc shape with a recess of 2 to 10 cm in the center (this is referred to as an arc shape ratio of 1% to 5%). 1.0
If the concavity is larger than Crn, the bonding strength will be high, but the appearance of the finished product will be poor.On the other hand, if the arcuate ratio is less than 2 crn, that is, less than 1 inch, the desired effect cannot be obtained.

The most suitable means for giving an arcuate shape is to immerse a woven sheet in a polymer solution to adhere the polymer to the sheet, and then subject the sheet to which the polymer has been adhered to a continuous heat treatment machine. At that time, both edges of the sheet are held and pulled in the direction of travel, and the central part of the sheet is made to advance behind the edges, so that the yarn material distributed in the direction of travel is initially The most preferable manufacturing method is to fix the orthogonal threads in an arc shape (6).

This type of sheet, which has a coarse grain and an arc-shaped thread arrangement, is not only strong on its own, but also strong at the joints, so it is difficult to resist when exposed to strong winds, etc. However, due to the large torsional resistance, it is extremely strong against tearing.
It is extremely suitable as an agricultural, forestry, and civil engineering construction structure.

The present invention will be further explained in detail based on Examples below.

,t? A sheet having the following composition was obtained by arranging IJ ester multifilaments in the weft and weft directions.

This sheet was immersed in a polymer solution having the following composition: 100 parts by weight of PvC DOP (plasticizer) 80 〃 Stabilizer 1 〃 Anticene oxide (flame retardant) 30 〃 Pigment (green) 2 〃 Trichlene 25 〃 It was run on a continuous heat treatment machine. At this time, as shown in FIG. It was pulled to 14. The polymer was glued by heating, and an arc-shaped sheet for agriculture, forestry, civil engineering, and construction was obtained.

In this case, the degree of the arc shape is 1.0 m, the width l between the two edges is 2 m, and the depth of the recess is 5 cnn.
Met.

In another embodiment, as shown in FIG. 3, the number of folds of the yarn material in the ear portion 20 to be joined is made denser than in other portions, that is, the center portion 2, and the sheet is similarly formed into an arc shape. was also produced.

These sheets 1 and 2 according to the present invention are shown in FIG.
, (r3), the respective ears were joined. In this case, the bonding strength was high and the torsion resistance was particularly excellent as a structure. In particular, the one shown in FIG. 3 was suitable.

[Brief explanation of the drawing]

Figures 1 (A) and (B) are explanatory views showing the state of joining at the edges of the sheet according to the present invention, Figure 2 is an explanatory view of the manufacturing method, and Figure 3 is an illustration of the threads of the edges. FIG. 2 is an explanatory diagram showing a sheet with dense objects. ■, 2... sheet, 11.12... edge of sheet,
13...Central part of the sheet, 20...Ear part. Patent applicant Hiraoka Orisen Co., Ltd. Agent Patent attorney Masanori Kai (9) Engraving of drawings (no changes to the content) Figure 1 (A) Figure 1 (B) Figure 2 Y 4 @3 Drawing 1 1 , case presentation 6, number of inventions increased by amendment

Claims (5)

[Claims] (1) High-frequency suturing is possible by applying a polymer having high-frequency weldability 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 coarse sheet that can be sewn with high frequency, characterized in that yarns arranged in the warp or weft direction are arranged in an arc shape with respect to the weft or warp direction, respectively, to form a coarse sheet. Agriculture, forestry and civil engineering construction sheets (2) A coarse agricultural, forestry, civil engineering and construction sheet according to claim 1, wherein the arc shape is an arc shape having an arc ratio of 1 to 5 inches. (3) A layered sheet for agricultural, forestry, civil engineering and construction according to claim 1, in which the yarn material is made of natural fibers, synthetic fibers M1, or inorganic fibers. (4) 71 for synthetic fibers? Coarse agricultural, forestry, civil engineering and construction sheet according to claim 2, which is polyester or vinylon. (5) A coarse sheet for agriculture, forestry, civil engineering and construction according to claim 1, wherein the polymer is polyvinyl chloride. (6) A sheet made by knitting and weaving yarns that do not have high-frequency fusion properties arranged in the warp and warp directions. A coarse-grained sheet capable of high-frequency stitching, which is made by attaching a polymer having high-frequency weldability to a relatively coarse-grained sheet, and the coarse-grained sheet is formed by being arranged in an arc shape with respect to the weft or warp direction. A method of using a coarse agricultural, forestry, civil engineering and construction sheet that can be sewn using high frequency waves and overlaps an adjacent sheet of the same type at each edge to form a wide and vertical structure.