JP3248276B2 - Manufacturing method of non-twisted woven fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a non-twisted woven fabric using non-twisted yarns for both the warp and the weft or only the warp. The above-mentioned non-twisted woven fabric is impregnated with a resin. Later, it can be used as a fiber reinforced composite.

[0002]

2. Description of the Related Art A woven fabric serving as a base fabric of a fiber-reinforced composite is used to facilitate impregnation of a yarn constituting a woven fabric with a resin.
Further, in order to reduce the crimp of the yarn constituting the woven fabric, a non-twist yarn is used as the above-mentioned yarn. And when using a non-twisted yarn for the warp, the warp is sized and then woven in order to improve the weavability by bundling the warp so that it does not disperse into its constituent filaments. However, prior to the resin impregnation, desizing has to be performed, which causes a problem that the cost is increased.

[0003] If sizing is omitted, the filaments constituting the warp are poor in convergence, and the filaments may be scattered. Therefore, the weft conveying device such as a shuttle or rapier for weft insertion during weaving is used. Frequent filament breakage was caused by the loose filaments, which reduced the operability of the loom. In particular, in the case where a high-strength, high-elasticity organic fiber yarn is used as the warp, the cut filament is entangled with the adjacent warp, which impedes the opening of the warp, and this entanglement stretches the opening of the warp. The filament hindered the flight of the weft carrier, and the weft carrier sometimes jumped out of the opening.

[0004]

The object of the present invention is to prevent the weft conveyor from contacting the lower warp at the time of opening to eliminate filament breakage, and to improve the productivity of a non-twisted woven fabric using at least a non-twisted warp. Is to greatly improve.

[0005]

According to the present invention, there is provided a method for producing a non-twisted woven fabric using a non-twisted yarn as a warp, comprising: attaching a pile fabric having a cut pile having a pile length of 2 mm or more to the surface of a loom; A method for producing a non-twisted woven fabric, comprising lowering the lower warp yarn in the cut pile.

The non-twisted yarn is a continuous organic fiber having a high strength and a high elasticity, such as a yarn composed of aramid fiber or ultra-high molecular weight polyethylene fiber having zero twist and a yarn having only unwound twist. It is a substantially non-twisted yarn. Further, the pile fabric has a cut pile like a moquette, and the pile length is 2 mm or more, preferably 7 mm or less, and particularly preferably 3 to 5 mm. The cut pile may be inclined in the weaving width direction, but the inclination angle is preferably 45 degrees or more, particularly preferably 60 degrees or more with respect to the horizontal plane.

[0007]

When the warp is opened and a weft carrier such as a shuttle or rapier runs through the opening, the lower warp forming the opening sinks below the tip of the cut pile. The chance of contact with the lower warp is greatly reduced, so that the filament constituting the warp does not come into contact with the weft carrier and is cut off. However, when the length of the cut pile is less than 2 mm, the lower warp yarn is exposed on the cut pile and easily comes into contact with the weft carrier, so that the intended purpose cannot be achieved.

[0008]

FIG. 1 is a side view showing a main part of a loom. In FIG. 1, reference numeral 11 denotes a sley which reciprocates back and forth, 12 denotes a reed which reciprocates with the sley 11, and 13a and 13b denote sleys.
It is a wire heald that moves up and down in synchronization with the back and forth movement of 1.
A pile fabric 20 having a cut pile 21 is adhered to the surface of the sley 11, and a number of warp threads Ta and Tb are sequentially passed one by one between the wire healds 13a and 13b and the reed 12. The warp Ta, Tb stretched in the front-rear direction is divided vertically by the lifting and lowering movement of the wire healds 13a, 13b to form an opening 14, and when the sley 12 is at the retracted position, 14, the weft W is inserted by a weft carrier 15 such as a shuttle or a rapier, and then the sley 11 and the reed 12 advance, and the front and rear wire healds 13a and 13b exchange the upper and lower positions to change the weft W into the warp Ta and Tb. The fabric F is organized.

A pile yarn of 16th acrylic spun yarn is used as a pile yarn, and various cut pile fabrics for upholstery having different pile lengths are prepared, and the pile fabric 20 is attached to the sley 11 of a loom as the pile fabric 20 described above. Weaving a woven fabric F for use as a base fabric for a fiber reinforced combo using a 1500 denier / 1000 filament non-twisted non-adhesive yarn composed of aramid filaments for both the warp yarns Ta, Tb and the weft yarn W, and weaving a woven fabric 5 m The number of cuts of the filaments in the warps Ta and Tb during the operation (the loom is stopped and counted every 5 m) and the number of times the loom stops at the entanglement of the warp filaments while weaving the woven fabric 50 m were compared. The results are shown in Table 1 below. However, the structure was plain weave, and the warp density and the weft density were both set to 15 yarns / inch.

Table 1 Example 1 Example 2 Comparative Example Pile length (mm) 3.5 2.0 1.5 Tilt angle of pile (degree) 70 70 70 Filament breakage (piece / 5 m on weaving) 1 2 13 Number of stops of loom ( Times / textile 50m) 1 8 31

As apparent from Table 1 above, in both Examples 1 and 2, both the number of filament breaks and the number of stoppages were significantly smaller than those of Comparative Examples, and the productivity was good.

[0012]

As described above, the present invention relates to a method for producing a non-twisted woven fabric using a non-twisted yarn as a warp, comprising: attaching a pile fabric having a cut pile having a pile length of 2 mm or more to the surface of a loom; Since the lower warp is sunk into the cut pile at the time, when a weft carrier such as a shuttle or a rapier runs through the opening, the chances of the weft carrier contacting the lower warp are reduced, and the warp is reduced. The constituent filaments do not break due to contact with the weft carrier, and the productivity is greatly improved.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a loom.

[Explanation of symbols]

 11: Sleigh 12: Reed 13a, 13b: Wire heald 14: Opening 15: Weft carrier 20: Pile fabric 21: Cut pile Ta, Tb: Warp W: Weft F: Woven fabric (base fabric for fiber reinforced conbodget)

Claims (1)

(57) [Claims] 1. A method for producing a non-twisted woven fabric using a non-twisted yarn as a warp, wherein a pile length of 2
A method for producing a non-twisted woven fabric, comprising attaching a pile fabric having a cut pile of not less than mm and sinking a lower warp yarn at the time of opening into the cut pile.