Process for producing nonwoven fabric and nonwoven fabric

Abstract

The nonwoven fabric production process of the invention comprises a laminating step in which composite yarn, obtained by bundling a plurality of resin single filaments each having a core-sheath structure with a filamentous core resin surrounded by a sheath resin with a melting point of at least 20°C lower than the core resin and fusing the sheath resin together, is laminated in at least the three directions of warp direction, slant direction and reverse slant direction, and a bonding step of heating the laminated filament bundles at a temperature lower than the melting point of the core resin and higher than the melting point of the sheath resin for bonding. According to the invention, it is possible to provide a nonwoven fabric production process and nonwoven fabrics with excellent plasticity and shape following property, as well as adjustable strength for adaptation to different purposes and required properties.

Description

technical field [0001] The present invention relates to a method for producing a nonwoven fabric in which continuous fiber strands are laminated, and a nonwoven fabric in which continuous fiber strands are laminated. Background technique [0002] As industrial materials such as concrete peeling prevention materials, fabrics and braids such as glass fibers, carbon fibers, aramid fibers, and vinylon fibers are generally used, and various woven fabrics (registered trademark) ( continuous fiber nonwovens). Among the woven fabrics, there are three-axis woven fabrics laminated in the warp direction, oblique direction, and reverse oblique direction, or four-axis woven fabrics laminated in the warp direction, weft direction, oblique direction, and reverse oblique direction. [0003] As a method for producing the woven fabric, for example, a production method in which vinylon fibers or the like are paralleled in a predetermined direction and the fibers are bonded together with a hot...

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Problems solved by technology

[0007] However, after combining vinylon fibers, in the production method of using a hot-melt adhesive or latex adhesive to join, the cost is high because the adhesive is required, and the adhesive is attached to the useless place, so there is a problem of making the nonwoven fabric The problem of deterioration of the working environment of the process

[0008] In addition, in the method of melting and bonding reinforcing fibers with thermoplastic resin, since it is difficult to completely cover the reinforcing fibers with thermoplastic resin, the bonding force is insufficient. , the durability is not enough

[0009] In addition, in the woven mesh fabric made of the core-sheath structural wire of the polyester polymer, the gap between the fibers cannot be enlarged like the woven fabric, so it is difficult to apply to the concrete spalling prevention material, and the manufacture of the mesh body is complicated, high cost problem

[0010] In addition, the woven cloth and the mesh cloth of the above-mentioned disclosed example are not good in softness or bendability, and the followability is not enough.

Such a woven cloth or mesh cloth is not very versatile in the field of industrial materials such as concrete spalling prevention, so it is strongly desired to improve it.

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