JPS6256262B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for softening long fiber fabrics. Conventionally, various methods for making long fiber fabrics flexible have been proposed. The most common method is to apply softeners such as silicone compounds to textiles, but this method only has a temporary effect; the effect disappears after washing, and the color of the product changes. This method is not satisfactory, as it has drawbacks such as poor color fastness and reduced color fastness, and there is also a risk of skin damage. In contrast to chemical softening methods such as adding softeners,
Physical softening methods such as batting and rolling have also been used for a long time. However, conventional batting and kneading cloths are difficult to process uniformly and tend to wrinkle, making it difficult to apply them to long-fiber fabrics. In recent years, a method of softening fabric using a shrinking machine with an endless elastic band and a heat cylinder, such as the invented method described in Patent No. 907828, has been used, but in this method, the material to be treated becomes thinner. , firmness and flexibility cannot be obtained. The method of the present invention eliminates the shortcomings of these conventional softening methods and is a completely new method for softening long-fiber fabrics that can impart fluffy flexibility without any adverse effects on the processed material. , is characterized in that the napping machine is used under conditions where no napping is performed. That is, in the present invention, a long fiber fabric is introduced into a napping machine equipped with a cloth roll having needles with a working angle of 10° to 80°, and when the needles are brought into contact with the fabric, the tips of the needles If the cloth is facing in the same direction as the fabric, the needle tip of the clothing roll is moved in the same direction as the fabric so that the speed of the needle tip when the fabric and the needle contact is slower than the advancing speed of the fabric, If the tip of the needle is facing in the opposite direction to the direction of fabric movement, the needle tip of the clothing roll should be aligned with the fabric so that the speed of the needle tip when the fabric contacts the needle is faster than the speed of movement of the fabric. This is a method for softening a long fiber fabric, which is characterized by making the long fiber fabric move in the direction. The method of the present invention will be explained in detail below. The woven fabric used in the method of the present invention is a woven fabric made of long fibers, such as a woven fabric made of rayon filament, or a synthetic fiber filament such as polyamide fiber or polyethylene terephthalate fiber, or a woven fabric made by blending or interweaving these fibers. There are textiles that use processed long fiber yarn. In the method of the present invention, the long fiber fabric is introduced into a napping machine equipped with a clothing roll, and the needles inserted into the clothing must have a working angle of 10° to 80°. Working angle refers to the angle at which the needle tip acts on the fabric surface, and is θ in Figure 1, θ' in Figure 2, α in Figure 3,
This refers to α' in Figure 4. Note that Figures 1 to 4 show the relationship between the needle and the fabric in side views, and Figures 1, 5,
9, 13 are woven fabrics, 2, 6, 10, 14 are needles, 3,
7, 11, and 15 are the base fabrics of the clothing. If the working angle is less than 10°, the action of the needles on the fabric will be weak and sufficient softening effect will not be obtained, and if the working angle is more than 80°, the action of the needles on the fabric will be too strong and the strength of the fabric surface will be reduced. There is a risk that the color may deteriorate and even fuzz may occur. A suitable material for the needle is hard steel wire or stainless steel wire. The shape of the needle may be either a curved needle such as 2 in FIG. 1 and 6 in FIG. 2, or a straight needle such as 10 in FIG. 3 and 14 in FIG. 4. The cross-sectional shape of the needle is preferably circular or oval; triangular or rhombic cross-sectional shapes may damage the surface of the fabric. Also, the diameter of the needle is 0.1 to 0.8
It is desirable to be in the range of mm. If it is less than 0.1 mm, the surface of the fabric may be damaged, and if it is more than 0.8 mm, the softening effect may be insufficient. Clothing rolls are made by wrapping needles on a base fabric made of rubber, felt, cotton, and/or linen, etc., around a steel roll, and the needle density of the clothing roll is 1 square inch. 150 per hit
It is desirable to have 400 books. If the needle density is less than 150, the flexibility effect may be insufficient, and if it is more than 400, no further improvement in flexibility will be seen and it will be uneconomical. The raising machine used in the method of the present invention can be of any type as long as it has auxiliary devices such as a clothing roll, a cloth feed-in roll, and a pull-out roll. As an example, FIG. 5 schematically shows a side view of a napping machine (a so-called double napping machine) equipped with a counter pile roll and a pile roll as clothing rolls. In Fig. 5, 17 is a counter pile roll, 18 is a pile roll, 19 is a textile feed roll, 20 is a textile pull-out roll, 21 is a drum, 22 is a textile, and 23 is a cleaning brush. The pile rolls are arranged alternately on a rotating drum, and both rolls are self-rotating. A double raising machine is equipped with a pile roll in which the needle tip is oriented in the same direction as the cloth traveling direction, and a counter pile roll in which the needle tip is oriented in the opposite direction to the cloth traveling direction. A napper consisting of a roll of clothing in only one direction can also be used in the method of the invention. Although FIG. 5 shows a total of 12 clothing rolls, the method of the present invention is not limited thereto, and can be applied to a napping machine having any number of clothing rolls. In the method of the present invention, when the fabric is introduced into the napping machine and brought into contact with the needles of the clothing roll, it is essential that the contact be made under the following conditions. In other words, when the tip of the needle faces in the opposite direction to the traveling direction of the fabric (FIG. 6), the speed of the needle tip at the contact point 26 between the fabric and the needle 25 increases relative to the advancing speed of the fabric 24, so that the clothing roll 27 is rotated so that the tip of the needle faces in the same direction as the traveling direction of the fabric (FIG. 7), the speed of the tip of the needle at the contact point 30 between the fabric and the needle 29 is slower than the advancing speed of the fabric 28. Rotate the clothing roll 31 as you like. In this way, in the present invention, the needles do not pierce the fabric, but rather stroke the fabric, thereby not damaging the fabric surface and disturb the filaments that make up the fabric, thereby imparting fluffiness and flexibility. It is. In addition, in the case of a double raising machine, the cloth roll 2 shown in Fig. 6
7 is a counter roll, clothing roll 31 in Fig. 7
corresponds to the pile roll, and both rolls are mounted on a drum that rotates in the same direction as the textile traveling direction, so both rolls also move in the same direction as the textile traveling direction, but the actual rotation of both rolls themselves is (rotation) is often in the direction of the dashed line. The relationship between needle tip speed, fabric advancing speed, and fabric advancing speed may be as long as the above conditions, but depending on the napping machine, if the speed difference is too large, problems such as "sagging" may occur at the introduction or withdrawal section of the fabric. This may occur, so in a normal raising machine, the needle tip speed of the counter pile roll should be kept at a maximum of about twice the fabric advancing speed, and the pile roll needle tip speed should be kept at a minimum of about 1/2 of the fabric advancing speed. It is desirable to keep it at a minimum. In the method of the present invention, a long fiber fabric is introduced into a napping machine and the fabric is brought into contact with needles under the above-mentioned conditions to impart flexibility. 2 if necessary
It is sufficient to repeat the process one or more times and then introduce the fabric into the napping machine. Examples will be described below, but the method of the present invention is not limited thereto. Note that the drape coefficient and total hand, which were used as indicators of flexibility in the examples, were each measured according to the JIS method. Example 1 Both warp and warp polyester filament 150d/30F/
2 was prepared, and the twill fabric was equipped with 12 pile rolls wrapped with the following clothing cloth A and 12 counter pile rolls wrapped with the same clothing cloth, similar to that shown in Fig. 5. The fabric was introduced into a double nap machine, brought into contact with the needles under processing conditions 1 below, and then pulled out. <Clothing cloth A> Needle material: hard steel Needle shape: curved needle Needle diameter: 0.305 mm Needle cross-sectional shape: round Needle working angle: 45° Base fabric: natural rubber and cotton cloth laminate Needle density ; 280 pieces/square inch Processing conditions 1 Weaving speed; 8 m/min Linear speed of the needle tip of the counter pile roll when in contact with the fabric; 10.2 m/min Linear speed of the needle tip of the pile roll when in contact with the fabric;
6.5 m/min The obtained twill fabric was fluffy and had excellent flexibility as shown in Table 1. For comparison, the drape coefficient and total hand of the unprocessed product were also measured and shown in Table 1.

[Table] Example 2 A twill fabric using polyester long fiber processed yarn 75D/36F in both warp and warp was prepared, and the fabric was wrapped around 15 counter pile rolls wrapped with the following clothing B and the same clothing cloth. The fabric was introduced into a napping machine similar to that shown in FIG. 5 equipped with 15 pile rolls, and the fabric was brought into contact with needles under the following condition 2, and then pulled out. <Clothing cloth B> Material of the needle: hard steel Shape of the needle: straight needle Diameter of the needle: 0.205 mm Cross-sectional shape of the needle: round Working angle of the needle: 70° Base fabric: lamination of felt and cotton cloth Density of the needle; 270 pieces/square inch Processing conditions 2 Advancement speed of the fabric; 10 m/min Linear speed of the needle tip of the counter pile roll when in contact with the fabric; 12.5 m/min Linear speed of the needle tip of the pile roll when in contact with the fabric;
8.2 m/min The obtained twill fabric was fluffy and had excellent flexibility as shown in Table 2. For comparison, the flexibility of unprocessed products was similarly measured and shown in Table 2.

[Table] Example 3 A twill fabric using nylon filaments 100D/24F in both diameter and weft was prepared, and 12 counterpile rolls were wrapped with the cloth A of Example 1 and the needles of Example 2. Pile roll wrapped with cloth B
They were introduced into a napping machine equipped with 12 needles, brought into contact with needles under condition 3 below, pulled out, and then processed again using the same napping machine under the same conditions. Processing conditions 3 Advance speed of the fabric: 12 m/min Linear speed of the needle tip of the counter pile roll when in contact with the fabric; 14 m/min Linear speed of the needle tip of the pile roll when in contact with the fabric;
9.5 m/min The obtained fabric was fluffy and had excellent flexibility as shown in Table 3. For comparison, the flexibility of unprocessed products was similarly measured and shown in Table 2.

【table】 [Brief explanation of the drawing]

Figures 1 to 4 are side views showing the shape of the needle used in the method of the present invention and the relationship between the needle and the fabric; 1, 5, 9, and 13 are fabrics, and 2, 6, 10, and 14 are needles. , 3, 7, 11, 15 are base fabrics, θ,
θ', α, α' indicate the working angle. FIG. 5 schematically shows a side view of the dual-type napping machine, in which 17 is a counter pile roll, 18 is a pile roll,
19 is a feeding roll, 20 is a drawing roll, 21
2 is a drum, 22 is a fabric, and 23 is a cleaning brush. Figures 6 and 7 are side views showing the relationship between the traveling direction of the fabric and the direction of the needles.
25 and 29 are needles, 26 and 30 are contact points between the needles and the fabric, and 27 and 31 are clothing rolls.

Claims (1)

[Claims] 1. A long fiber fabric is introduced into a napping machine equipped with a cloth roll having needles with a working angle of 10° to 80°, and when the needles are brought into contact with the fabric, the tips of the needles touch the fabric. If the needle tip of the clothing roll is facing in the same direction as the traveling direction of the fabric, the needle tip of the clothing roll is moved in the same direction as the fabric so that the speed of the needle tip at the time of contact between the fabric and the needle is slower than the advancing speed of the fabric, If the tip of the needle faces in the direction opposite to the direction in which the fabric travels, move the needle tip of the clothing roll against the fabric so that the needle tip speed at the time of contact between the fabric and the needle is faster than the advancing speed of the fabric. A method for softening a long fiber fabric, characterized by making the fibers migrate in the same direction. 2. The method for softening a long fiber fabric according to claim 1, wherein the material of the needles is hard steel or stainless steel. 3 The cross-sectional shape of the needle is circular and the diameter is 0.1
A method for softening a long fiber fabric according to claim 1 or 2, characterized in that the fiber length is in the range of 0.8 mm. 4 The needle density of the clothing roll is per square inch.
A method for softening a long fiber fabric according to claim 1, 2 or 3, characterized in that the number of fibers is 150 to 400.