JPS6153469B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a water-repellent fabric for heat-fusion sewing.

Conventionally, in order to manufacture water-repellent fabric products such as tents and canopies, pieces of water-repellent fabric cut into predetermined dimensions were sewn using sewing thread. In this case, there is a disadvantage that water leaks from the sewing machine needle hole, and in order to eliminate this disadvantage, a sealant treatment, such as applying a sealant to the sutured part or applying a sealant tape to the sutured part, is necessary. Such processing was necessary. To overcome the above-mentioned drawbacks of conventional machine sewing, high frequency or heat fusion stitching has been developed and is becoming popular. In this high frequency or heat fusion suturing, a part of the fabric itself is melted and bonded by high frequency or heat, or a high frequency adhesive tape is inserted between two pieces of fabric and the tape is melted to form two pieces. It is used to bond fabrics. However, in the latter case, if the water-repellent treatment agent applied to the fabric is acrylic resin, chlorinated polyethylene resin, silicone resin, fluororesin, or zirconium salt compound, it may not adhere to these water-repellent fabrics. The adhesion to the adhesive tape was low, and therefore satisfactory suture adhesive strength could not be obtained. Therefore, when high frequency or heat fusion suture bonding is performed by conventional methods, there are limitations on the types of water repellent treatment agents that can be applied to fabrics.

An object of the present invention is to provide a method for producing a water-repellent fabric that can be heat-sealed and sewn regardless of the type of water-repellent treatment agent.

The method for producing a water-repellent fabric for heat-fusion sewing of the present invention is a step of applying water-repellent treatment to only the remaining portion of the fabric, excluding the portion to be sewn, when applying water-repellent treatment to the fabric. The present invention is characterized by comprising the steps of: and then attaching a hydrophobic polymer sheet that can be melt-bonded by heating to the portion to be sewn.

The type of fabric base (hereinafter referred to as base fabric) used in the method of the present invention is not particularly limited, and any type of fabric that has been conventionally used as a base fabric for water-repellent fabrics may be used. It's okay. For example, woven fabrics, knitted fabrics, or composite fabrics made of cotton, water-insoluble polyvinyl alcohol fibers, polyester fibers, nylon 6 fibers, nylon 66 fibers, polypropylene fibers, polyacrylic fibers, etc. can be used as the base fabric. .

There are no particular limitations on the type of water-repellent agent applied to the base fabric, and all conventional water-repellent agents can be used. For example, coating with hydrophobic resin such as polyvinyl chloride, polyvinylidene chloride, polyacrylic acid ester, chlorinated polyethylene, silicone resin, fluororesin (polytetrafluoroethylene, etc.), zirconium salt compound, metal soap, wax, etc. For example, impregnation or coating can be used.

In order to leave the part of the base fabric to be sewn without applying water-repellent treatment, use a coating device with a coating box, roll printing machine, screen printing machine, etc. that can specify the part to be coated with water-repellent agent. I can do it.

There are no particular limitations on the shape and dimensions of the part of the base fabric to be sewn, but usually both sides of the edge of the base fabric,
Or apply the width to only one side to be joined with the adhesive tape.
It is set at 0.5 to 5 cm.

There are no particular limitations on the adhesive polymer sheet as long as it can be melted by heat treatment and can be used to adhere fabrics, but it usually includes polyvinyl chloride, polyamide, polyurethane, polyester, vinyl chloride-vinyl acetate copolymer, and ethylene. - Consisting of at least one kind such as vinyl acetate copolymer. There are no restrictions on the shape, width, thickness, length, etc. of the adhesive tape, and it may be of any kind as long as it is practicable, but in general,
Preferably, it has a width of ~50 mm and a thickness of 0.05 mm or more.

In the method of the present invention, after the water-repellent treatment step is applied to only the remaining portion of the fabric excluding the portion to be sewn, the polymer sheet pasting step as described above is performed to the portion to be sewn. Ru.

In this case, an adhesive may be applied to the adhesive surface of the polymer tape in dots or lines, and the polymer sheet may be attached to the portion of the fabric to be sewn via this adhesive. .

In the method of the present invention, the fabric is treated with a water repellent agent before being attached with the hydrophobic polymer sheet, so the fabric treated with the water repellent agent has a uniform thickness and the fabric is treated with a water repellent agent. Operations such as transporting, impregnating, and squeezing the fabric in the process are easy, and winding can be performed without difficulty.

Since no water repellent is applied to the seamed adhesive surface of the water-repellent fabric produced by the method of the present invention, the adhesion between this adhesive surface and the molten adhesive tape is extremely strong. Furthermore, since the adhesive tape is made of a hydrophobic polymer, the sutured portion can also exhibit excellent water repellency.

In order to obtain complete water repellency by distributing the molten hydrophobic polymer over the entire surface of the stitched area of the fabric as described above, a polymer sheet having an area larger than the area of the stitched area is added to one part of the fabric. It is desirable to use it so that it protrudes outward from the suture surface. For example, if you are planning to overlay the edges of fabric pieces over a width of 3 cm and stitch and glue them together, a polymer sheet with a width of 5 cm will be placed on the area to be sewn, and 1 cm of each edge will be sewn on each side. It is preferable to arrange and stick it so that it protrudes outside the part.
After the fabric obtained by the method of the present invention is heat-treated and sewn, the remaining polymer sheet protruding from the sewn portion is usually removed to form a smooth sewn portion. does not need to be removed.

Even if a part of the fabric is not treated with water-repellent treatment on both sides of the fabric and a polymer sheet is attached to only one side of the fabric, at least the surface to be sewn is coated with a hydrophobic polymer. There are no particular problems as a whole because the combination makes it water repellent. However, if necessary, a water-repellent treatment may be performed by overlaying a polymer sheet on the non-adhesive surface and melting and adhering the polymer sheet by heat treatment.
In this case, the appearance of the water-repellent fabric product obtained becomes even more favorable.

In addition, when a particularly high degree of water repellency is required, such as a tent, the fabric product obtained after the above-mentioned heat fusion and suture treatment is further treated with a water repellent agent using a soaking method or the entire surface coating method to improve the water repellency of the product. can be further increased.

The heating suture treatment in the method of the present invention can be performed using any heating and pressing device. for example,
The Leister hot air welding machine has a hot air nozzle with a flat air outlet and a pressure roller.The hot air from the hot air nozzle is blown onto a desired area of the adhesive tape to melt it, and then the fabric is immediately placed on top of it. The parts to be sewn can be overlapped and the fabrics can be pressed together using a pressure roller. Alternatively, a hot air nozzle may be inserted between the overlapped fabric and adhesive tape, the above melting operation may be performed, and the hot air nozzle may be moved along the tape surface to immediately perform the pressurizing operation.

The method of the present invention makes it possible to heat-seal and sew water-repellent fabrics regardless of the type of water-repellent treatment agent, and its practical utility is extremely high.

The method of the present invention will be further explained below with reference to Examples.

Example A plain woven fabric having the following structure was manufactured using vinylon long fiber single yarn (100 denier) as the warp and weft.

100D/1×100D/1/58 pieces/25.4mm
×61/25.4mm The above fabric is used as the base fabric, and the width of both edges is 3
Apply 30g of treatment solution with the following composition on both sides, leaving a cm.
It was applied using a coater in an amount of m ² .

Acrylic ester resin (20% toluene solution)
100 parts crosslinking agent (toluene diisocyanate, 30% toluene solution) 2 parts paraffin (m, p. = 66°C) 2 parts cobalt octylate 10 parts toluene 20 parts When this coated layer was dried, the amount of dried coated layer was approx. It was 10g/ ^m2 .

A polyvinyl chloride tape (with adhesive applied in a line on the adhesive surface) with a width of 5 cm and a thickness of 0.15 mm is placed on the edge, and a width of 1 cm on each end of the tape protrudes from the overlapping part. I pasted it like this.

The water-repellent fabric obtained in this way is cut to a desired size, and the two pieces of fabric are overlapped so that the part to be sewn (the part to which the polymer sheet is attached) faces each other, and the overlapped part is A Leister hot air welding machine was used for heated suturing. A hot air nozzle with a flat hot air outlet with a width of 3 cm is inserted between the water-repellent fabric and the tape, and while moving the nozzle along the tape surface in the sewing direction of the water-repellent fabric, C hot air was blown onto the tape to melt it in a width of approximately 3 cm. Following this melting operation, the overlapping portion of the water-repellent fabric and tape was pressed using a pressure roller.

After this suture adhesion treatment, the remaining sheets protruding from the overlapped portions were removed.

The stitched portion of the obtained stitched water-repellent fabric is
It showed sufficient water repellency and adhesive strength for practical use.

As mentioned above, since the large width adhesive tape was sutured so that it protruded from the seam adhesive surface, the parts of the fabric that were not treated with water repellent treatment were completely made repellent by the molten adhesive tape. It had been water-based.

Furthermore, when a silicone-based water repellent was further spray-coated on the above-mentioned sewn product, the non-adhesive surface, which had not been subjected to water-repellent treatment, showed sufficient water-repellency for practical use.

Separately, the above operation is repeated, and before the heat treatment, a colored adhesive tape having the same color as the water-repellent treatment agent is placed on the non-adhesive surface that has not been subjected to the water-repellent treatment. When the film was placed and heat treated, this part also showed the same color and water repellency as the other parts.

Claims (1)

[Scope of Claims] 1. When applying water-repellent treatment to a fabric, a step of applying water-repellent treatment only to the remaining portion of the fabric, excluding the portion to be sewn, and then to the portion to be sewn, A method for producing a water-repellent fabric for heat-fusion sewing, comprising the step of attaching a hydrophobic polymer sheet that can be melt-bonded by heating. 2. The method according to claim 1, wherein water-repellent treatment is applied to both the front and back surfaces of the portion of the fabric to be sewn, and a polymer sheet is affixed to only one of the surfaces. . 3. The method according to claim 1, wherein a water-repellent treatment is applied to the portion of the fabric to be sewn, except for only the surface to which the polymer sheet is attached. 4. The method according to claim 1, wherein the width of the polymer sheet is larger than the width of the portion to be sewn. 5. The method according to claim 1, wherein the polymer sheet pasting step is performed after the water-repellent treatment step.