JPS5914586B2 - Manufacturing method of coarse woven fabric - Google Patents

Description

[Detailed description of the invention] The present invention relates to a novel method for producing coarse woven fabrics.

When comparing woven fabrics at the same density, the productivity of woven fabrics is proportional to the woven width and the number of rotations of the loom, that is, the number of woven fabrics.

However, there are limits to both the weaving width and the number of rotations of the loom, and it is difficult to dramatically increase the loom size from the current level.

The present invention was arrived at as a result of various studies focusing on this point, and it is possible to obtain much higher productivity than conventional weaving machines using the current loom.

The present invention is also suitable in principle for the production of coarse fabrics such as cold sand.

The present invention is a method for producing a coarse woven fabric, which comprises weaving a woven fabric using spun yarn for the warp and undrawn filament yarn made of synthetic fiber for the weft, and stretching the woven fabric in the direction of the undrawn yarn after weaving. It is.

So-called partially oriented yarns made from undrawn yarns such as polyester or nylon yarns or by methods such as high-speed spinning to increase the degree of orientation can be stretched up to 3 to 4 times, depending on the manufacturing conditions.

Therefore, if the undrawn yarn is used as the weft of a woven fabric and the vaginal weft is stretched after weaving, the area of the woven fabric will be expanded according to the stretching ratio, resulting in extremely high productivity of up to 3 to 4 times.

However, this method has the drawback that the warp density decreases due to the drawing of the weft yarns, making it easy to cause misalignment.

As a result of various studies on this point, the present inventors have found that if spun yarn is used as the warp yarn, misalignment can be prevented by the fuzz of the spun yarn.

The undrawn yarn may be stretched at room temperature, that is, by cold stretching, but it is preferably carried out under heating.

As a practical method, it is economical to use a center that is normally used for heat setting fabrics.

Furthermore, if a misalignment prevention process is performed using an adhesive or the like before and after the elongation process, a more perfect result can be obtained.

This will be explained in more detail with reference to Examples below.

Example 1 A single yarn with a cotton count of 30 and 100% polyester was used for the warp, and a cutting elongation of 525 denier was used for the weft with a cutting elongation of 300.
Using undrawn polyester yarn consisting of 8 filaments, warp density 28/cIrL1 weft density 10/cIrL
A plain woven fabric with a weaving width of 1 m was woven.

The fabric was heated to 120 mm using a normal pin heat setter.
Heat treatment was performed in hot air at a temperature of 3.5 times the width in the width direction.

The resulting fabric has a warp density of 8/α and a weft density of 10/c.
It was a coarse woven fabric of m.

Furthermore, due to elongation, the fabric area became 3.5 times the input area.

The fabric was lightly bonded with acrylic resin in a conventional manner.

Example 2 651% polyester was used as the warp yarn, and undrawn polyester yarn consisting of 30 filaments with a cutting elongation of 150% and 350 denier, made by high-speed spinning, was used as the warp yarn using 651% polyester and a single yarn of rayon with a cotton count of 35 and 30 filaments. Use warp density 18
Book/crrL1 weft density 10 pieces/crIL1 woven width 17
An rL plain weave was woven.

The fabric was heated at 180°C using a normal pin heat setter.
Heat treatment was performed in hot air at ℃ while stretching the sheet 2.3 times in the width direction.

The resulting fabric has a warp density of 8/crrL1 and a weft density of 10.
It was a coarse woven fabric with a diameter of 1 cm/cm.

Good results were obtained when the fabric was used as agricultural sand.

Claims (1)

[Claims] 1. A woven fabric is woven using spun yarn for the warp and undrawn yarn made of synthetic fiber (including partially oriented filament yarn) for the weft, and after weaving, the woven fabric is stretched in the direction of the undrawn yarn. Method for manufacturing coarse woven fabrics.