JP2001303427A - Method for thermally treating fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for thermally treating a fabric, by which the fabric can thermally be treated with a small setter to produce the fabric free from curves, wrinkles and set spots. SOLUTION: This method for producing the fabric, comprising thermally treating the fabric comprising synthetic fibers and/or inorganic fibers in a running state, characterized by thermally treating the fabric in conditions satisfying follows (a) to (f). (a) The running speed of the fabric is 0.2 to 3.0 m/min. (b) The heating temperature is 130 to 350 deg.C. (c) The heating time is 15 to 60 sec. (d) The tension of the fabric in the running state is 784 to 9,800 N/m. (e) The length of the heating region is 10 to 150 cm. (f) The distance between fabric- gripped points placed at the front and rear positions of the heating region is 1 to 50 cm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for heat-treating a fabric, and more specifically, for example, a polyester base fabric used for a tent sheet or a conveyor belt is set so as not to be deformed at the time of resin processing and has a low shrinkage. The present invention relates to a heat treatment method for reducing the shrinkage of any fabric used in industrial applications, such as for making a safety belt made of aramid fiber, and for setting the stretch of an aramid fiber safety belt.

[0002]

2. Description of the Related Art Conventionally, for heat treatment of a fabric used for the above-mentioned applications, for example, a setter having a setter zone having a length of 10 m or more is used. The reason for using such a large setter is to increase the setter speed to several tens m / min to one hundred and several tens m / min to reduce the cost. However, heat treatment was performed at a high speed using a large setter. In this case, there is a problem that a heat absorption difference is easily generated due to a temperature difference between the center portion of the setter zone and both sides, and the fabric after the heat treatment is easily curved.

In order to correct such a curvature, the set is normally corrected by repeating the setting twice. However, in reality, wrinkles and spots of the set are inevitably generated, and a high quality product is hardly obtained.

When heat treatment is performed using a large-sized setter as described above, the woven fabric must be wound up once and transported to the setter. (It is often located in a distant place, often transported by truck or railroad), transport costs are high, wrinkles often occur during storage and transport, and especially, fabrics that require sufficient precision heat treatment In, such wrinkles may cause set spots.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to minimize the amount of cloth movement by using a small setter which can be installed adjacent to a loom. It is an object of the present invention to provide a heat treatment method for a fabric which can be heat-treated while keeping the curvature, wrinkles, and set spots.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above-mentioned object, and have found that, while controlling the tension of the fabric to a specific range, a heat treatment at a low speed, which has not been achieved in the past, has a desired fabric. And obtained the present invention.

Thus, according to the present invention, synthetic fibers and / or
Alternatively, there is provided a heat treatment method for a fabric, wherein a heat treatment is performed on a fabric composed of inorganic fibers in a running state under conditions that simultaneously satisfy the following (a) to (f). (A) The running speed of the fabric is 0.2 to 3.0 m / min. (B) The heating temperature is 130 ° C. to 350 ° C. (c) The heating time is 15 to 60 seconds. (D) The tension of the running fabric is 784. ~ 9800N
/ M (e) The length of the heating area is 10 to 150 cm. (F) The distance between the heating area and the gripping points of the fabrics located before and after the heating area is 1 to 50 cm.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a cloth made of synthetic fibers such as polyester fibers, polyamide fibers, vinylon fibers and aramid fibers and / or inorganic fibers such as glass fibers is subjected to heat treatment in a running state.

The heating temperature at this time needs to be 130 to 350 ° C. When the heating temperature is lower than 130 ° C., there is no setting effect, and when it is higher than 350 ° C., the fiber deteriorates.

[0010] The heating temperature is set to the polyester fiber (33.3).
170 ° C. to 220 ° C. in the case of a fabric woven and knitted with ５５5555 dtex yarn, 130 ° C. to 210 ° C. in the case of polyamide fiber and vinylon fiber (fabric woven and knitted with 33.3 to 5555 dtex yarn), aramid Fiber (5
In the case of a fabric woven and knitted with 5.5 to 5555 dtex yarn), the temperature is preferably from 280 ° C to 350 ° C. In addition, glass fiber (cloth woven with yarn of 111 to 5555 dtex)
In this case, the temperature is preferably from 250C to 350C.

When heating, the temperature at the inlet of the heater is lowered, the temperature at the outlet is raised, and a temperature gradient of 20 to 30% is applied to reduce the occurrence of wrinkles.

In the present invention, the running speed of the cloth is set at 0.1.
It is important to control within the range of 2 to 3.0 m / min.
If the traveling speed is less than 0.2 m / min, it is difficult to control the speed, which causes an increase in cost. On the other hand, when the traveling speed exceeds 3.0 m / min, set spots and wrinkles are likely to occur. The preferred running speed of the fabric is 0.5 m to 2.0 m /
Minutes.

In the present invention, the length of the heating zone such as a heater is set to 10 to 150 cm, and the heating time is set to 15 to 150 cm.
It is necessary to control within the range of 60 seconds. Heating zone length is 1
When the length is less than 0 cm, there is no setting effect. On the other hand, when the length of the heating area exceeds 150 cm, uneven shrinkage occurs. The preferred length of the heating zone is 30 to 100 cm. Also,
If the heating time is less than 15 seconds, there is no setting effect, and set spots are likely to occur. On the other hand, if the heating time exceeds 60 seconds, the fiber is deteriorated. Preferred heating time is 25 seconds to 5 seconds.
0 seconds.

Further, in the present invention, the tension of the running cloth is set to 784 to 9800 N / m, and the distance between the heating area and the gripping points of the cloth located before and after the heating area is set to 1 to 50 cm. It is necessary to.

If the tension is less than 784 N / m, the fabric loses the contraction force during the heat treatment, causing the cloth to slip and set spots. On the other hand, when the tension exceeds 9800 N / m, the fabric is deteriorated or damaged, and an excessive load is applied to the roller.

If the distance between the heating zone and the gripping points of the cloths located before and after the heating zone is less than 1 cm, the roller diameter becomes too small, and it is difficult to control the roller in the above-mentioned tension range. . On the other hand, if the distance exceeds 50 cm, the tension at the ears of the fabric fluctuates, and uneven shrinkage occurs. The preferred spacing is between 3 and 30 cm.

The gripping point of the cloth means not only a point at which the cloth is sandwiched and nipped between rollers (nip point), but also a point at which the cloth comes into contact with the roller surface while running under the tension. (Not nipped).

[0018]

The present invention will be described in more detail with reference to the following examples. In addition, the generation state of the wrinkles of the fabric after the heat treatment in the examples was functionally determined according to the following criteria. ◎ No wrinkles occurred. ○ There are very slight wrinkles and irregularities. Δ: There are partially clear irregularities and wrinkles. X: There are clear irregularities and wrinkles over the entire surface.

Example 1 As a warp, 1111 dte
x / 192 filament (T503Z) polyester yarn at a density of 42 yarns / in and a weft yarn of 667d
tex polyester monofilament yarn 27 / i
The cloth arranged at a density of n is 12 cm long and 230 cm wide.
Are arranged in a line, and the length of the heating zone is set to 36 cm, and the distance between the heater and the gripping point (not nipped) of the cloth on the feeding roller and the winding roller is set to 15 cm using a heating treatment apparatus. , The heater temperature is sent out from the roller side to 170 ° C., 185 ° C., 21
At 0 ° C., while maintaining the fabric tension at 2156 N / m, the overfeed rate was 2% and the running speed of the fabric was 0.5 m / m.
The heat treatment was performed under the conditions of minutes and a heating time of 43.2 seconds. Table 1 shows the shrinkage ratio of the obtained fabric and the state of occurrence of wrinkles in the fabric after the heat treatment.

Example 2 556 dtex as warp
/ 96 filament (T503Z) polyester yarn at a density of 34 yarns / in and 556 dte as weft yarn.
A fabric in which x / 96 filament (T503Z) polyester yarns are arranged at a density of 35 yarns / in has a heater length of 140 cm, a heater, and a gripping point of the fabric on a delivery roller and a take-up roller. Is set to 30 cm, the heater temperature is set to 205 ° C., and the tension of the cloth is set to 3 cm.
The heat treatment was carried out under the conditions of an overfeed rate of 4%, a running speed of the fabric of 2.8 m / min, and a heating time of 30 seconds while maintaining the 920 N / m. Table 1 shows the shrinkage ratio of the obtained fabric and the state of occurrence of wrinkles in the fabric after the heat treatment.

[Example 3] In Example 1, the heater length was 12 cm, the distance between the heater and the gripping point (not nipped) of the cloth on the feed roller and the take-up roller was 20 cm, and the heater temperature was set to 20 cm. All 205
C., the running speed of the fabric was set to 0.2 m / min, and the heating time was set to 36 seconds. Table 1 shows the shrinkage ratio of the obtained cloth and the state of wrinkles of the cloth after the heat treatment.
Shown in

Example 4 In Example 2, the distance between the heater and the gripping point (not nipped) of the cloth on the feed roller and the take-up roller was 30 cm.
The operation was performed in the same manner as in Example 1, except that the running speed of the cloth was set to 3.0 m / min and the heating time was set to 28 seconds. Table 1 shows the shrinkage ratio of the obtained fabric and the state of occurrence of wrinkles in the fabric after the heat treatment.

Example 5 833 dtex as warp
/ 192 filament (T533M) polyester yarn at a density of 18 yarns / in and 833 dt as weft yarn.
ex / 192 filament (T533M) polyester yarn at a density of 20 / in
m, a heating zone having a width of 36 cm by arranging three heaters having a width of 230 cm and a distance of 15 cm between the heater and a gripping point (not nipped) of the cloth on the feeding roller and the winding roller. Using a processing device, the heater temperature was set to 200 from the feed roller side, and the fabric tension was kept at 2156 N / m, while the overfeed rate was 2%, the running speed of the fabric was 0.6 m / min, and the heating time was 36 seconds. Heat treated. Table 1 shows the shrinkage ratio of the obtained fabric and the state of occurrence of wrinkles in the fabric after the heat treatment.

[Comparative Example 1] The same operation as in Example 1 was performed except that the heater length was changed to 8 cm, the running speed of the cloth was changed to 0.11 m / min, and the heating time was changed to 43.6 seconds. . Table 1 shows the shrinkage ratio of the obtained fabric and the state of occurrence of wrinkles in the fabric after the heat treatment.

Comparative Example 2 The same fabric as in Example 1 was used, except that the heater length was 10 m and the distance between the heater and the gripping point (not nipped) of the fabric on the feed roller and the take-up roller was 45 cm. The heater temperature was set to 205 ° C., and the overfeed rate was 3 while maintaining the fabric tension at 3430 N / m.
%, At a running speed of the fabric of 30 m / min. The total heating time was 40 seconds. Table 1 shows the shrinkage ratio of the obtained fabric and the state of occurrence of wrinkles in the fabric after the heat treatment.

Comparative Example 3 The same operation as in Example 1 was carried out except that the tension of the fabric was reduced to 686 N / m. Table 1 shows the shrinkage ratio of the obtained fabric and the state of occurrence of wrinkles in the fabric after the heat treatment.

[Comparative Example 4] Same as Example 1 except that the distance between the heater and the gripping point (not nipped) of the cloth on the feed roller and the take-up roller was set to 70 cm. It was carried out. Table 1 shows the shrinkage ratio of the obtained fabric and the state of occurrence of wrinkles in the fabric after the heat treatment.

Comparative Example 5 The procedure of Example 1 was repeated, except that the running speed of the cloth was set at 5.0 m / min and the heating time was set at 4.3 seconds. Table 1 shows the shrinkage ratio of the obtained fabric and the state of occurrence of wrinkles in the fabric after the heat treatment.

Comparative Example 6 The procedure of Example 1 was repeated except that the heating temperature was set at 125 ° C. Table 1 shows the shrinkage ratio of the obtained fabric and the state of occurrence of wrinkles in the fabric after the heat treatment.

[0030]

[Table 1]

[0031]

The heat treatment method of the present invention has the following effects as compared with the conventional heat treatment method. 1. The running speed of the fabric is 0.2 m / min to 3.0 m / min,
Since the speed is much lower than in the past, it is possible to obtain a high-quality, low-shrink fabric having improved surface flatness without curling and wrinkling in one set. 2. The installation space of the setter can be reduced, and it can be processed in parallel with the weaving mill. Therefore, the quality of the fabric is not degraded due to the transport of the fabric, and weaving and heat treatment can be performed by one worker. 3. Since the heater capacity can be small, the cost for manufacturing and operating the setter can be reduced, and the handling is excellent in terms of safety and management.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Isamu Saiga 3-4-1, Amihara, Ibaraki-shi, Osaka Teijin Limited Osaka Research Center F-term (reference) 3B154 AA07 AA08 AA13 AB20 BA32 BB12 BB47 BF01 BF06 BF04 BF06 BF14 DA13 DA18 DA30

Claims (4)

[Claims] When heating a fabric composed of synthetic fibers and / or inorganic fibers in a running state, the following (a)
A heat treatment method for a fabric, wherein the heat treatment is performed under a condition that simultaneously satisfies conditions (a) to (f). (A) The running speed of the fabric is 0.2 to 3.0 m / min. (B) The heating temperature is 130 ° C. to 350 ° C. (c) The heating time is 15 to 60 seconds. (D) The tension of the running fabric is 784. ~ 9800N
/ M (e) The length of the heating area is 10 to 150 cm. (F) The distance between the heating area and the gripping points of the fabrics located before and after the heating area is 1 to 50 cm. 2. The method according to claim 1, wherein the running speed of the cloth is 0.5 to 2.0 m / min. 3. The method according to claim 1, wherein the heating temperature is 170 ° C. to 220 ° C. 4. The space between the heating zone and the gripping points of the fabric located before and after the heating zone is 3 to 30 cm.
Or the method for heat treating a fabric according to 3.