Production method for high-performance fiber one-way warp knitting fabric

Abstract

The invention discloses a production method for high-performance fiber one-way warp knitting fabric. The production method includes the following steps that 1, warp yarns are prepared, unwound and subjected to yarn dividing, and are evenly arranged to enter a knitting area; 2, bound yarns are prepared, and are covering yarns, and the covering yarns are structurally characterized in that high-melting-point dacron or nylon serves as an inner core, and the outsides of the covering yarns are covered with low-melting-point dacron or nylon; 3, the bound yarns are fed into the knitting area and bound, and gray fabric is obtained; 4, the gray fabric is fed into a heating area and heated, and the heating temperature is higher than the melting point of the low-melting-point dacron or nylon and lower than the melting point of the high-melting-point dacron or nylon; 5, cooling and winding are carried out. According to the production method, heating is carried out through the bound yarns, the warp yarns and non-melted bound yarns are combined through melted fibers, the defect that one-way fabric is prone to deformation is overcome, trouble of operation is reduced in the following reprocessing process, and unlike weft-yarn hot-melting-yarn shaping, the whole thickness of the fabric can be increased.

Description

technical field [0001] The invention relates to a production method of a high-performance fiber unidirectional warp knitted fabric. Background technique [0002] High-performance fiber warp knitted fabrics have been widely used in the field of composite materials. These fibers include glass fibers, carbon fibers, boron fibers, aramid fibers, silicon carbide fibers, asbestos fibers, whiskers, metal wires, etc. Warp knitted fabrics are planar two-dimensional weaving products, including uniaxial, biaxial, triaxial and multiaxial products. Among them, except for unidirectional fabrics, the other types are relatively stable structures due to more directions. fabric. At present, most of the unidirectional fabrics used in various products on the market use polyester as the binding. The ordinary warp knitting unidirectional includes 0° fiber warp yarns, and the 0° fiber warp yarns generally use fiber bundles with a large tex number as the main direction, ±N ° The same type of fibe...

AI Technical Summary

Problems solved by technology

At present, most of the unidirectional fabrics used in various products on the market use polyester as the binding, and the ordinary warp knitting unidirectional includes 0° fiber warp yarn, and the 0° fiber warp yarn generally adopts the fiber bundle with a large tex number as the main direction, ±N ° The same type of fiber or different types of fibers are used as weft yarns. For ±N°, fiber bundles with a smaller tex number are generally used as auxiliary yarns to line the warp yarns, and polyester yarns are used as bundles to weave warp knitted fabrics. There will be a shrinkage phenomenon in the process of this production method, that is, the width of the door will shrink during the process of weaving to winding, and the theoretical door width will not be reached, and the overall fabric surface is soft. Cropping, etc. will be scattered

However, there is a kind of weft yarn on the market that uses hot-melt yarn for setting the fabric, which will increase the thickness of the overall fabric and reduce the performance in subsequent production pouring.

[0003] In addition, there is a common one-way woven fabric. The one-way weaving needs to use glass fiber, other types of spun yarn, and hot-melt shaped yarn as the weft direction foil. Weaving is easy to deform in one direction, and it is not easy to operate in subsequent processing, and the main fiber in the 0° direction has buckling. Although the hot-melt setting yarn is used as the weft yarn to alleviate the problem that the fabric is not easy to deform, it cannot solve the problem of the main fiber in the 0° direction. Buckling, just like reinforced concrete, the overall performance will be poor if the steel bars are bent

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