JPS623261B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for manufacturing fiber mesh. Fiber mesh products can be used as insect repellent nets, fences, waterproofing, insulation sheets, etc.
It is widely used as a reinforcing material for FRP, GRC, etc.

Traditionally, the manufacturing method for mesh products has been to use a loom to weave with spaced stitches and then apply coating and sealing processes, but normally the number of strokes of the loom is 100 times/minute. The productivity is low if the weft yarn preparation process is less than that, and it is extremely inefficient considering the complexity of the weft preparation process, sealing process, etc. In addition, weaving efficiency is largely controlled by yarn cohesiveness and friction coefficient, and warp yarns are usually subjected to a sizing process, and additional twisting may be necessary. In particular, additional twisting is a major factor in increasing costs.In the FRP and GRC fields, where glass fibers are mainly used, the apparent decrease in rigidity resulting from the twisting and shrinkage of glass fibers reduces its function as a reinforcing fiber.

In addition, as a method that does not involve weaving, binder is spread in advance in the weft direction on a group of threads having regular intervals to form a blind, and then the threads are run separately as wefts. There is a method for producing fiber mesh that is bonded to threads to seal them.
In this method, the process of adhering and fixing the threads in a blind shape with a binder is complicated, which increases the cost.Furthermore, the thread breakage and fluffing occur frequently during the process, so there are restrictions on the types of raw threads that can be used. . Furthermore, the binder that is dispersed in the form of threads has low rigidity, and the threads expand and contract in the weft direction, making it difficult to maintain dimensions, and the mesh spacing is uneven.

In view of this situation, the present inventors conducted intensive research and completed the present invention.The purpose of the present invention is to create a fiber mesh that is not limited by the number of twists and the bundled state of the threads, and furthermore To provide a method and apparatus for producing an inexpensive fiber mesh that has uniform mesh spacing, is strong, and enables the application of a wide range of polymers without employing a complicated process of spraying a binder onto the strips and forming them into a screen shape. .

That is, the present invention provides a rotating body to be driven, a yarn supplying member, a synthetic polymer supplying device, and a film for bonding warp yarns to the film surface of a synthetic polymer on the surface of the rotating body to form a reel-like yarn. A film fixed blind thread preparation mechanism comprising a fixed blind blind thread take-up member, a cutting device for cutting the film fixed blind blind thread into a certain length, a device for attaching a synthetic polymer to another thread, and , a fiber mesh comprising: a member for supplying the yarn; a pressing member for crossing the yarn and the film-fixed reed-like yarn to be cut to a certain length; and a heat treatment device for fusing the intersections of the crossed yarns. This is a fiber mesh manufacturing device characterized by comprising a preparation mechanism.

The yarns referred to in the present invention are natural fibers such as cotton, linen, and western wool, chemical fibers such as rayon, acetate, nylon, polyester, polyethylene, polypropylene, acrylic, vinylon, vinylidene, and polyvinyl chloride, glass, carbon, and metal. filament yarns, spun yarns, plied yarns, split yarns, and tape yarns made of inorganic fibers such as

Furthermore, the synthetic polymer used to form the film according to the present invention is a thermoplastic polymer such as a polyamide polymer or a vinyl polymer. In particular, a vinyl polymer is suitable because it has excellent heat fusion properties at low temperatures. be. Examples of vinyl polymers include acrylic acid, methacrylic acid, ethacrylic acid, itaconic acid, maleic acid,
Fumaric acid, aconitic acid, vinyl acetic acid, esters and amides of these carboxylic acids, nitriles such as methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, methoxymethyl methacrylate, butyl methacrylate, chloroethyl methacrylate, itacon Homopolymers of vinyl monomers such as dimethyl acid, monomethyl maleate, monomethyl fumarate, methacrylonitrile, acrylamide, methacrylamide or vinyl acetate, vinyl chloride, vinylidene chloride, styrene, vinyl alcohol, etc. copolymers of vinyl monomers and olefins, such as ethylene, propylene, 1-butene, 2-butene, isobutylene, 1-pentene, 2-pentene, 2-methyl-1-butene, 3-methyl -1-butene, 2
- Monoolefins such as methyl-2-butene, 1-hexene, 2-hexene, 4-methyl-1-pentene, 2,3-dimethyl-2-butene, 5-methyl-1-hexene, and butadiene, isoprene, 1 , 3-pentadiene, 1,4-pentadiene, and 1,5-hexadiene. Furthermore, these polymers may contain heat-resistant agents, mold release agents, etc., if necessary.

A film can be formed from the vinyl or polyamide polymer by discharging the molten polymer through a slit, or by dissolving the polymer in a solvent to form a solution or emulsion and then forming the film.

Furthermore, in the present invention, the synthetic polymer to be attached to the threads refers to the thermoplastic polymer forming the film, such as phenol formaldehyde resin, urea-formaldehyde resin, melamine-formaldehyde resin, epoxy resin, silicone resin, etc. It is a thermosetting polymer. In order to attach the synthetic polymer to the yarn, in the case of a thermoplastic polymer, it is used in a molten state, in the case of a thermosetting polymer, it is used in an uncured state, or these synthetic polymers are used in a solvent. Prepare a homogeneous solution that can be dissolved in or an emulsion solution before use. The synthetic polymer to be attached to the threads is preferably a polymer with a higher melting point than the synthetic polymer used to form the film, so as to obtain a fiber mesh that maintains uniform mesh spacing and is fixed. I can do it.

The present invention will be explained with reference to the drawings.

The drawings are explanatory diagrams showing a preferred embodiment of the present invention.

The warp yarn 1 is transferred to a rotating body 4 by rollers 2 and 3, which are yarn supply members. The rotating body 4 is constituted by an endless belt 6 having excellent surface releasability and in contact with the driving drums 5, 5', and a synthetic polymer supplying device 7 is provided near the bottom of the rotating body 4. The supply device 7 uses a synthetic polymer in the form of a melt or a solvent solution, and forms a film by discharging it from a slit or filling it into a container and bringing it into contact with a rotating body.

Furthermore, the position of the synthetic polymer supply device 7 is the same as that of the rotating body 4.
It is not limited to the lower part of the warp yarn 1, but a synthetic polymer film is formed on the surface of the rotating body.
What is necessary is just to set it in the appropriate position preferable for adhesively fixing. Furthermore, instead of using the endless belt 6 as the rotating body 4, only a drum or roller having excellent surface releasability may be used. After the synthetic polymer 8 is deposited in the form of a film from the synthetic polymer supply device 7 on the surface of the endless belt 6, the warp yarn 1 is supplied by the roller 3 and fixed by adhering to the film. Rollers 10 and 1, which form the film-fixing blind thread 9 while being transported, are used as take-off members.
1. Here, the film-fixed blind thread 9 is wound onto another roller to form a package, and then the package is transferred to the next process, and while the package is unwound, the film-fixed blind thread 9 is cut by a cutting device. Either the material is cut into a fixed length, or it is continuously cut by a cutting device while being taken off from a take-off member, and the drawings show the latter method.
The film-fixed blind thread 9 is taken up by a roller 11, and further cut into a certain length by a cutting device 13. After that, a suction device 14 is used to transfer the film-fixed blind blind thread 9 onto a conveying member 15 in the weft direction. and transport it. Furthermore, when feeding another warp thread 16 by rollers 17 and 18, which are feeding members, so as to intersect with the film-fixed reed-like thread 9, a synthetic polymer, such as an aqueous emulsion, is arranged by a synthetic polymer adhering device 19. After uniformly adhering to the warp threads 16, the warp threads 1 are pressed by a roller 20 as a pressing member.
6 and the film-fixed blind thread 9 are brought into close contact with each other so as to intersect with each other, and then transferred to heat treatment apparatuses 21 and 22. The synthetic polymer supplied to the synthetic polymer deposition device 19 may be used in an appropriate state such as melt, solvent solution, or aqueous emulsion. The heat treatment device 21 preheat-treated the synthetic polymer film and the warp threads 16 while being transferred by rollers 23 in an atmosphere that maintained the synthetic polymer at a temperature below the softening point of the synthetic polymer attached to the warp threads 16. Heating rollers 24, 24 dry the aqueous emulsion to fix the intersection with the film-fixing reed-like threads 9, and then transfer it to a heat treatment device 22 and keep it within a temperature range of at least the melting temperature of the synthetic polymer and below the decomposition temperature. ' by threads 9 and 1
A fiber mesh 27 is produced by fusing the intersection points of 6 and passing from the guide roller 25 to the cooling rollers 26 and 26', and is formed into a package 29 by the winding roller 28 to obtain a product. Heat treatment equipment 2
1 and 22 can be appropriately selected and used, such as a device provided with a temperature gradient or a device provided with a heat insulating plate to divide the temperature range.

Alternatively, the cooling rollers 26, 26' may not be used, and the film may be run between the heat treatment device and the take-up rollers while being air-cooled. Furthermore, a cutter for removing edges of the fiber mesh may be provided at an appropriate position between the heat treatment device and the winding roller.

Further, the roller used in the present invention is preferably a roller with excellent surface releasability. According to the present invention, any yarn can be used regardless of the cohesiveness, number of twists, cross-sectional shape of the fibers, etc., and it is possible to create an inexpensive and homogeneous fiber mesh with excellent production efficiency and uniform mesh spacing. It enables manufacturing and has extremely large industrial value.

The present invention will be explained below with reference to Examples.

Example Using the method and equipment shown in the drawings, a molten mixture of ethylene and vinyl acetate copolymer (melting point 90°C) with a small amount of paraffin wax, an antioxidant, and an antiblocking agent added to a synthetic polymer supply device. At the same time, the synthetic polymer was discharged in the form of a film with a width of 500 mm and a weight of 35 g/m ² onto an endless belt 6 whose surface was treated with silicone resin through the slits in 7. At the same time, alkali-resistant glass fibers (225Tex manufactured by Kanebo Co., Ltd. with a twist number of 0.5 s／
100 pieces (inch) are warped at 5mm intervals and roller 2,
3 and attached to a film of ethylene-vinyl acetate copolymer to obtain a film-fixed reed-like thread 9.

Next, 200 yarns 16 warped at 5 mm intervals using the alkali-resistant glass fiber yarn were impregnated with polystyrene emulsion at a solid content of 15 g/m using a synthetic polymer deposition device 19. After
Yarn 16 that can be warped into the above-mentioned 200 yarns by cutting the film-fixing blind-like yarn 9 to a length of 1 m.
The yarns are laminated by a suction device 14 so as to be in the weft direction, and the yarns are crossed by a pressing roller 20, and then passed through a hot air dryer at 60° C. as a heat treatment device 21 to form warp yarns 16. After the polystyrene to be impregnated is solidified and the warp and warp threads are sealed, the synthetic polymer film is melted and sealed by being brought into heat treatment equipment 22 and pressed by rollers 24 and 24' heated to 110°C. The reinforcement and yarns are coated with synthetic polymer,
Through the cooling rollers 26, 26', the mesh interval 5
It was possible to produce a fiber mesh having a diameter of mm.

In addition, as a comparison, a similar fiber mesh was manufactured using a glass fiber loom using the alkali-resistant glass fiber yarn described above, but as a result, weaving became impossible due to frequent yarn breakage and the process was discontinued.

Furthermore, as a result of searching for conditions that would enable the production of fiber mesh using this alkali-resistant glass fiber yarn, we found that the number of additional twists was 3.8/inch and a sizing agent mainly composed of vinyl acetate polymer was applied to the yarn. Weaving became possible by adhering 4%, and manufacturing became possible by sealing with a synthetic resin adhesive.

The present invention is significantly superior to conventional methods in terms of workability, process simplification, cost, and product homogeneity.

[Brief explanation of the drawing]

The drawings are explanatory diagrams showing one embodiment of the present invention. 1, 16... Yarn, 2, 3, 10, 11, 17,
18, 20, 23...Roller, 4...Rotating body, 5,
5'...Drum, 6...Endless belt, 7...Synthetic polymer supply device, 8...Synthetic polymer, 9...Film fixed blind thread, 12... Film fixed blind blind thread preparation mechanism, 13...Cutting device, 14... Suction device, 15... Conveying member, 19... Synthetic polymer adhesion device, 21, 22
...Heat treatment device, 24, 24'...Heating roller, 2
5... Guide roller, 26, 26'... Cooling roller, 27... Fiber mesh, 28... Winding roller,
29...Package, 30...Fiber mesh preparation mechanism.

Claims (1)

[Claims] 1. A rotating body to be driven, a yarn supplying member for bonding the warping yarns to the film surface of the synthetic polymer on the surface of the rotating body to form a reel-like yarn, a synthetic polymer supplying device, and a film. A film fixed blind thread preparation mechanism comprising a fixed blind blind thread take-up member, a cutting device for cutting the film fixed blind blind thread into a certain length, and a synthetic polymer attached to another warp thread. A device, a member for supplying the thread, a pressing member for crossing the thread with the film-fixed reed-like thread to be cut to a certain length, and a heat treatment device for fusing the intersection of the crossed threads. A fiber mesh manufacturing device comprising a fiber mesh adjustment mechanism.