JPS592836A - Coarse sheet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Paint scattering prevention sheet. The present invention relates to a coarse sheet having mesh voids suitable and effective for use as a curing sheet, etc.

Conventionally, in order to create a windbreak net or curing sheet by connecting coarse sheet materials one after another, it is necessary to use a mesh molded material such as vinyl chloride resin, vinyl chloride IJ dene, resin, etc., or to apply vinyl chloride resin to the entire circumference of the yarn in advance. A fabric with a relatively coarse mesh was woven from threads coated with a similar material.

However, in the former case, if heat fusion is applied to join the single pieces together to form a wide and long structure, the entire joint will melt and most of the parts will melt due to the low melting point of the resin. Therefore, it is necessary to use other means for joining, such as sewing by a sewing machine, but as a result, the strength at the joint surface is extremely low, and the work is difficult due to misalignment. It had some drawbacks. Furthermore, since it is in the form of a monofilament, it also has the disadvantage of high tension.

In addition, in the latter case, each thread is coated with resin around its entire circumference and the coated threads are woven, so the surface friction force of each thread is reduced to a minimum. Mechanical weaving is extremely difficult and poses a practical obstacle.In addition, the weight of the product becomes large, and the threads slip together, resulting in loose threads and unevenness at the warp and weave intersections, and the weaving becomes hard. It was extremely inconvenient to handle as it ended up being bulky.

In the coarse sheet according to the present invention, the sheet base fabric is constructed by knitting and weaving yarns made of natural fibers, synthetic fibers, or inorganic fibers arranged in advance in the weft and weft directions. The strips may be spun yarns, filament yarns, split yarns, tape-like yarns, etc., and are not particularly limited. However, in consideration of strength, fabric weight, and other factors, particularly preferred are polyester or vinylon filament yarns having a relatively high melting point of 10 to 5000 deniers. These threads may be knitted or woven in any way, but in particular, in addition to the plain weave shown in Figure 1 (A),
A special material such as a leopard weave shown in the same figure (B) or a leno weave shown in the same figure (C') is preferable. In addition, the size of the mesh of the sheet is 15 mm x 15 mm, or 225 m, if the mesh is square.
It is preferably less than m2 and particularly preferably 05 to 10 mm square.

A thermoplastic polymer is then attached to these sheet base fabrics to produce coarsely porous sheets.

The thermoplastic polymer may be polyvinyl chloride, urethane resin, ethylene-vinyl acetate polymer, or the like, but those mainly composed of polyvinyl chloride are particularly preferred.

The polymer preferably accounts for 50% or more of the weight of the sheet base fabric,
70-200% adhesion. Attachment is accomplished by dipping and drying the sheet base fabric in the above polymer solution, but it is also possible to attach by other known methods.

Furthermore, appropriate chemicals may be added to the polymer to impart flame retardant properties and other properties. It is desirable to use threads constituting the base fabric that do not or cannot be easily melted by heat and have a higher melting temperature than the adhesive resin.

The thus completed coarse-grained sheet has great strength and can be fused, glued, sewn, etc. at any part, and there is no risk of a decrease in strength during joining. In particular, unlike conventional mesh-shaped molded products made of synthetic resin, etc., a base fabric is first formed and synthetic resin is attached on top of it, so even in the case of heat fusion, etc., the synthetic resin adhered when bonded to an adjacent coarse sheet, etc. Since bonding occurs between the resins and does not extend to the base fabric, there is no possibility that the constituent threads will melt and the joints become weak. Unlike those that are coated and knitted to form the base fabric, there are no defects such as resin intervening at the joints of the warp and weft threads, resulting in thicker parts and severe unevenness on the finished sheet, and the surface is almost the same. With a uniform thickness, it is uniform and there is no fear that the threads will slip and slip through, resulting in an extremely excellent coarse sheet. To explain this schematically, in the present invention, as shown in FIG. 4(A), since the resin 3 is attached to the base fabric consisting of the warp 1 and the weft 2, the bottom surface of the coarse sheet is almost flat. On the other hand, in the conventional example, as shown in the same figure, resin 3 was attached to each of the warp 1 and weft 2 in advance, so the resulting coarse sheet had a large surface unevenness and was bulky. There will be a quarrel. Furthermore, the former has no loose threads or misalignment at all, but the latter has this to a greater extent.

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

Example: Using polyester multifilament yarns arranged in the weft and weft directions, the following sheet base fabric was obtained by weaving as shown in FIG. 1(B). Average coarseness is 3.5
It was 3.5 mm x 3.5.

7X7 (book/inch) This sheet is made of PVC100li't DOP (Plasticizer) 80. #Stabilizer
1 antimony oxide (flame retardant) 3 o pigment (green) 2 trichlene 25 It was immersed in a polymer solution having the following composition and dried by squeezing to form a glue, and the polymer was sufficiently adhered thereto. As a result, a fabric was obtained in which 100% of the weight-type composite was adhered to the base fabric.

The manufactured sheet (■) is joined at the end to the adjacent sheet (■) by folding its edges together as shown in FIG. The sheets are welded and then joined to other adjacent sheets one after another in the same manner to finally obtain a wide and long structure as shown in FIG. ! , As another mode of bonding, ) to (6) in Fig. 2
), sutures may be carried out with a sewing thread 11i, with or without using a separately prepared thermoplastic resin piece, or an auxiliary piece 10 made of a knitted or nonwoven fabric coated with a thermoplastic resin. The coarse sheet structures formed by joining these sheets had high strength at the joints and were sufficiently useful as windbreak nets, sheets for construction work, paint scattering prevention sheets, curing sheets, etc.

Other matters The sheets shown in Figure 1 (A) and (C), each made of a base fabric to which a polymer was adhered, were also able to achieve good results.

[Brief explanation of the drawing]

FIGS. 1(A) to (C) are explanatory views showing knitting and weaving examples of the base fabric of the coarse sheet according to the present invention, and FIGS. 2(A) to (6) are respectively the joints with adjacent coarse sheets. 3rd cross-sectional view showing
The figure is an explanatory view showing a part of a wide and long structure using a coarse sheet, and FIGS. 4(A) and 4(B) are explanatory views showing the difference between the present invention and a conventional example. 1, II... Coarse sheet, 10... Auxiliary piece, 11.
・・Sewing thread O Patent applicant Hiraoka Orisen Co., Ltd. Agent Patent attorney Masaaki Kai Figure 2 (F) Figure 2 (G) Figure 2 (H) Figure 3 Procedural amendment April 1982 /7th Japan Patent Office Commissioner Kazuo Wakasugi 1, Indication of the case Patent Application No. 113343 of 1982 2, Name of the invention rough sheet 3, Person making the amendment Relationship to the case Patent applicant address Arakawa, Arakawa-ku, Tokyo 3-20-1 Name: Hiraoka Orisen Co., Ltd. 4, Agent address: 105-6, Subject of amendment (1) Scope of claims (2) Detailed description of the invention 7,
Contents of the amendment The Attachment A and the scope of the claims are corrected as per the original text. (1) Natural fiber 1 A thermoplastic polymer is attached to a relatively coarse base fabric made by knitting and weaving filaments made of synthetic fibers or inorganic fibers arranged in the weft and weft directions, and coarse voids are formed by adhering a thermoplastic polymer. Coarse sheet (2) Coarse sheet 225111
Coarse sheet (3) according to claim 1, which has a size of 12 or less. Coarse sheet (4) according to claim 1, whose synthetic fiber is I-lyester or vinylon. The thermoplastic polymer is polyester. Claim 1 which is vinyl chloride
The detailed description of the coarse sheet B0 invention set forth in claim 1, in which the attachment of the coarse sheet (5) described in claim 1 is achieved by dipping and drying the base fabric in a polymer solution, is corrected as follows.

Claims (1)

[Claims] (1) Natural fiber 1 A thermoplastic polymer is attached to a relatively coarse base fabric made by knitting and weaving filaments made of synthetic fibers or inorganic fibers arranged in the weft and weft directions. Coarse sheet (2) formed by forming coarse voids; Coarse sheet (3) according to claim 1, wherein the coarse openings have a size of 225 ran2 or less. Claim 1, wherein the synthetic fiber is polyester or vinylon. Coarse sheet (4) according to Claim 1, wherein the thermoplastic polymer is polyvinyl chloride; Claim 1: Coarse sheet (5) according to claim 1, wherein the attachment is achieved by dipping and drying the base fabric in a solution of the entire polymer. Coarse sheet according to claim 1