JPS6315390B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preventing curling of fiber fabric. Conventionally, when raising multi-tissue fabrics such as double-sided fabrics or warp knitted fabrics using a needle cloth type raising machine, the surface to be raised (surface) shrinks significantly in the width direction as the fibers are pulled out by the action of the needles. Since the side that is not brushed (the back side) is not affected by the needle, the shrinkage is small, and this causes a phenomenon in which the edge of the fabric to be processed bends toward the side that is brushed, that is, a curling phenomenon, which reduces the napping process and the napping process. This was a serious drawback in the next process. Currently, no active method has been taken to prevent this curling when raising the hair, and the curling after raising the hair is left as it is, and when the next process (the raising process in the case of repeated raising) is introduced, the spiral Currently, processing is performed while correcting curling using guiders such as rolls and tricot guiders. The present invention was made in view of the current situation, and
The purpose is to obtain a method that completely prevents curling during the napping process, thereby making the next process smoother. That is, the present invention provides a method for processing a fiber fabric by continuously introducing it into a napping machine equipped with a number of self-rotating clothing rolls on a rotating drum, and a hard steel fabric installed at the outlet of the fabric. A raised fabric that has a large number of needles made of wire or stainless steel wire on its surface and is characterized in that the back surface of the fabric is brought into contact with the surface of one or several rolls that rotate by themselves to lightly raise the nap on the back surface of the fabric. This is a curling prevention method. The method of the present invention will be explained in more detail below. The napping machine in the present invention is what is called a cloth-type napping machine, and refers to a napping machine in which a large number (usually 20 to 30) of self-rotating clothing rolls are mounted on a rotating drum. The needle cloth type napping machine includes a pile roll in which the tip of the needle is oriented in the same direction as the direction of movement of the fabric being processed, and a counter pile roll in which the tip of the needle is oriented in the opposite direction to the direction in which the fabric is being processed. There are two types of cloth raising machines: a double cloth raising machine equipped with two types of cloth raising machines, and a single cloth raising machine equipped with only one type of clothing roll; however, any of these raising machines may be used in the method of the present invention. The method of the present invention prevents curling by bringing the back side of the fabric into contact with a self-rotating roll having needles on its surface and pulling out the fibers on the back side immediately after the fiber fabric is taken out of a napping machine. However, the degree of napping on the back side is very small compared to the degree of napping on the front side, and curling of the ears can be completely prevented. Common sense suggests that in order to completely prevent curling, the napping level on the back side must be the same as on the front side, but contrary to expectations, repeated tests by the inventors have shown that the type of fabric to be processed It is quite surprising that curling can be completely prevented if the napping density on the back side is 1/10 to 1/50 of the napping density on the front side, although it varies depending on the material. In the present invention, the roll that is brought into contact with the back side of the fiber fabric to be processed must have a large number of needles on its surface. A wrapped cloth roll or a wire brush roll with needles directly planted on the roll can be used. The material of the needle is preferably hard steel wire, but if there is a risk of rust on the needle, stainless steel wire may be used. The shape of the needle can be either a curved needle with a curved tip (13 in Figure 2) or a straight needle (13 in Figure 2).
4) may be used, and the cross section of the needle may be of various shapes such as triangular, round, or oval; however, in the present invention, any shape may be used, and various needles may be used in combination. good. Regarding the length of the needle, a needle that is too long is inappropriate, so 5 mm is recommended.
~20mm is preferable, and the needle thickness is 0.2~0.6 in diameter.
A diameter of about mm is desirable. The density of needles on the roll varies depending on the type of fabric to be processed and the degree of napping, but is preferably in the range of 150 to 400 needles/inch square. The roll is driven by a belt or chain from the main body of the napping machine, or is rotated directly by a motor. The direction of rotation may be either forward or backward relative to the direction in which the fabric travels, but the rotation speed of the needle tip must be slightly slower or faster than the speed of travel of the fabric; at the same speed, curling, which is the object of the present invention, cannot be achieved. cannot be completely prevented. In addition, the number of rolls varies depending on the type of needle, density, rotation speed, and type of fabric to be processed, but 1
All you need to do is install one or more. Weak raising on the back side of the fabric can usually be applied to the entire back side, but even if it is applied only to the vicinity of the selvedges on the back side, the effect of preventing curling of the selvedges can be obtained. Examples of the method of the present invention will be described in detail below with reference to the drawings, but the present invention is not limited to these examples. FIG. 1 is a schematic side view showing an example of the processing steps of the method of the present invention. Expanded fiber fabric (polyester fiber double-sided 4
After passing through a guide roll 2 and a tension adjusting device 3, the sheet sateen fabric 1 is preheated in a heating cylinder 4. Next, the fabric introduced into the napping machine by the feeding roll 5 advances while contacting the needle tips on the surface of the clothing roll 7 mounted on the drum 8 which rotates in the same direction as the fabric traveling direction. The surface of the fabric is continuously raised and drawn out by the first drawing roll 9. Immediately after the first drawer roll, the raised side a of the fabric has strongly shrunk, so the raised side a
The selvage of the fabric is bent towards the side. Next, a belt (not shown) is driven by a motor (not shown) of a napping machine, which is provided immediately after the first pull-out roll 9, and has needles shown in Table 1 below on its surface, and is moved in a direction opposite to the traveling direction of the fabric. The rotating roll 10 and the back surface b of the fabric are brought into contact. The bent edges of the fabric are straightened, drawn out by a second pull-out roll 11, and then shaken off by a shake-off roll 12. The traveling speed of the fabric is 10 m/min, and the surface speed of the roll 10 is 11 m/min.
m/min. 【table】

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing one aspect of the processing steps in the method of the present invention. 1 is the fabric to be processed,
2 is a guide roll, 3 is a tension adjustment device, 4 is a heat cylinder, 5 is a feeding roll, 6 is a cleaning brush roll, 7 is a clothing roll, 8 is a drum of a napping machine, 9
10 is a roll with a large number of needles on the surface, 11 is a second drawer roll, 12 is a shake-off roll, a is the surface (raised side) of the processed fabric 1, and b is the back side. show. FIG. 2 shows the shapes of the needles used in the present invention, where 1 is a curved needle and 2 is a straight needle.

Claims (1)

[Scope of Claims] 1. When a fiber fabric is continuously introduced into a cloth-type napping machine of the type equipped with a number of self-rotating cloth rolls on a rotating drum and processed, the The back side of the fabric is lightly raised by bringing the back side of the fabric into contact with the surface of one or several rolls that have a large number of needles made of hard steel wire or stainless steel wire on the surface and rotate by themselves. A method for preventing curling of a raised fabric. 2. A method for preventing curling of a raised fabric according to claim 1, which comprises applying weak raising to the entire back surface of the fabric. 3. A method for preventing curling of a raised fabric according to claim 1, characterized in that a weak nap is applied only to the vicinity of the ears on the back side of the fabric.