Preparation method of caterpillar section moisture-absorbing quick-drying anti-perspective regenerated full-dull fiber

Abstract

The invention discloses a preparation method of a caterpillar section moisture-absorption quick-dry anti-perspective regenerated full-dull fiber, and belongs to the technical field of synthetic fibers. The method comprises the following steps: a, uniformly mixing crystallized and dried regenerated full-dull polyester chips with an antistatic agent accounting for 0-1wt% of the mass of the regenerated full-dull polyester chips and an antioxidant accounting for 0-1.5 wt% of the mass of the regenerated full-dull polyester chips to obtain a premix, extruding and melting the premix through a screw extruder to obtain a spinning melt, and spinning the spinning melt to obtain a regenerated full-dull polyester fiber; then the spinning melt is conveyed to a spinning assembly for spinning, and caterpillar section primary tows are formed; b, the primary tows are subjected to post-heating, air-free area treatment, circular air blowing cooling, bundling and oiling treatment, pre-interlacing, drafting and sizing and winding, and the caterpillar section moisture-absorption quick-dry anti-perspective regenerated full-dull fibers are obtained. The obtained fiber has the moisture absorption, quick drying and anti-perspective functions, the wearing comfort of clothes can be improved, and the market competitiveness is improved.

Description

Technical Field

[0001] The invention relates to the technical field of synthetic fibers, and more specifically to a method for preparing a caterpillar cross-section moisture-absorbing, quick-drying, anti-see-through, regenerated, fully matte fiber. Background Art

[0002] Since the advent of polyester fiber, it has been widely used in clothing textiles due to its good strength, excellent wrinkle resistance, drape performance and wearability. After decades of rapid development, PET polyester fiber has become the world's largest and most widely used synthetic polyester variety. However, compared with various natural fibers, polyester fiber still has many shortcomings: poor hygroscopicity, poor visual shielding of thin fabrics, etc. With the development of the economy, people have more demands on the functions and characteristics of textiles, especially summer clothing. People are increasingly pursuing light, comfortable and good shielding textile fabrics. Conventional products can no longer meet market requirements. Therefore, if a special-shaped cross-section polyester fiber with anti-see-through function and moisture absorption and quick drying can be developed, it will have a good application prospect. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for preparing a caterpillar cross-section moisture-absorbing, quick-drying, anti-see-through, regenerated, fully matte fiber.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] A method for preparing a caterpillar cross-section moisture-absorbing, quick-drying, anti-perspective, regenerated, fully matte fiber comprises the following steps:

[0006] a. Evenly mixing the crystallized and dried regenerated full-dull polyester chips with an antistatic agent accounting for 0-1wt% of the mass of the regenerated full-dull polyester chips and an antioxidant accounting for 0-1.5wt% of the mass of the regenerated full-dull polyester chips to obtain a premix, extruding the premix through a screw extruder to melt it to obtain a spinning melt, and then conveying the spinning melt to a spinning assembly for spinning to form a primary filament bundle with a caterpillar cross section;

[0007] b. The nascent tow is subjected to post-heating, windless zone, annular air cooling, bundling and oiling treatment, and then to pre-networking, drawing and shaping, and winding to obtain the caterpillar cross-section moisture-absorbing, quick-drying, anti-see-through, regenerated, fully matte fiber.

[0008] The present invention is further configured such that the antistatic agent is a plastic-specific antistatic agent RF-112.

[0009] The present invention is further configured such that the antioxidant is isorhamnetin.

[0010] The present invention is further configured such that the crystallization temperature of the regenerated full-dull polyester chips is 155-160° C., the drying temperature is 158-163° C., and the drying wind pressure is 0.1 Mpa.

[0011] The present invention is further configured that in step a, the heating temperatures of zones 1 to 5 of the screw extruder are 275-280°C for zone 1, 280-285°C for zone 2, 285-290°C for zone 3, 285-290°C for zone 4, and 288-292°C for zone 5, respectively; the extrusion pressure of the screw extruder is 12-13.5Mpa, and the pressure after filtration is 9-10Mpa.

[0012] The present invention is further configured as follows: in step a, the spinning temperature is 290° C., and the filter screen in the spinning assembly is a layer of 40 μm filter screen plus nine layers of 800 mesh filter screen.

[0013] The present invention is further configured such that, in step b, the post-heating temperature is 280° C., the height of the windless zone is 54 mm, and the wind pressure of the annular air cooling is 45 Pa.

[0014] The present invention is further configured as follows: in step b, the height of the oil nozzle for cluster oiling is 1000 mm, the distance between the cluster wire guide hook and the oil nozzle is 200 mm, and the oil concentration ratio is 11%.

[0015] The present invention is further configured as follows: in step b, the pre-network pressure is 0.07-0.09Mpa; in the stretching and shaping, the rotation speed of the first stretching roller is 2620-2800m / min, and the rotation speed of the second stretching roller is 2700-2800m / min.

[0016] The present invention is further configured such that, in step b, the winding speed is 2650-2790 m / min, and the winding tension is 6.5-7.5 cN.

[0017] In summary, the present invention has the following beneficial effects:

[0018] Using recycled full-dull polyester chips as raw materials, through the design of special-shaped cross-sections (caterpillar cross-sections) and process adjustments, the production of fibers with moisture absorption and perspiration removal, strong shielding properties and anti-transmission functions is achieved. The resulting fibers can effectively block light and ultraviolet rays, improve wearing comfort, meet practical life applications, and enhance the market competitiveness of textiles. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The preparation method of the caterpillar cross-section moisture-absorbing, quick-drying, anti-perspective, regenerated, fully matte fiber of the present invention comprises the following steps:

[0021] a. Evenly mix the crystallized and dried regenerated full-dull polyester chips (crystallization temperature is 155-160° C., drying temperature is 158-163° C., and drying wind pressure is 0.1 MPa) with an antistatic agent accounting for 0-1wt% of the mass of the regenerated full-dull polyester chips (the antistatic agent is preferably a plastic-specific antistatic agent RF-112 purchased from Shanghai Rufa Chemical Technology Co., Ltd., which is a composite mainly composed of ethylene oxide amine adducts) and an antioxidant accounting for 0-1.5wt% of the mass of the regenerated full-dull polyester chips (the antioxidant is preferably isorhamnetin) to obtain a premix, and pass the premix through The melt is extruded through a screw extruder to obtain a spinning melt, wherein the heating temperatures of the first to fifth zones of the screw extruder are 275-280° C. for the first zone, 280-285° C. for the second zone, 285-290° C. for the third zone, 285-290° C. for the fourth zone, and 288-292° C. for the fifth zone, respectively; the extrusion pressure of the screw extruder is 12-13.5 MPa, and the pressure after filtration is 9-10 MPa; and then the spinning melt is transported to a spinning assembly for spinning (the spinning temperature is 290° C., and the filter screen in the spinning assembly is a layer of 40 μm filter screen plus nine layers of 800 mesh filter screens), to form a primary filament bundle with a caterpillar cross section;

[0022] b. The nascent tow is subjected to post-heating, windless zone, annular air cooling, bundling and oiling treatment, and then to pre-networking, drawing and shaping, and winding to obtain the caterpillar cross-section moisture-absorbing, quick-drying, anti-see-through, regenerated, fully matte fiber.

[0023] In step b, the post-heating temperature is 280°C, the height of the windless zone is 54mm, and the wind pressure of the annular air cooling is 45Pa. The height of the oil nozzle for bunching oiling is 1000mm, the distance between the bunching wire hook and the oil nozzle is 200mm, and the oil concentration ratio is 11%. The pre-network pressure is 0.07-0.09Mpa; the speed of the first drafting roller in the drafting setting is 2620-2800m / min, and the speed of the second drafting roller is 2700-2800m / min. The winding speed is 2650-2790m / min, and the winding tension is 6.5-7.5cN.

[0024] Preferred embodiment 1

[0025] a. Crystallized and dried regenerated full-dull polyester (PET) slices (crystallization temperature is 155° C., drying temperature is 160° C., drying wind pressure is 0.1 MPa) are extruded and melted through a screw extruder to obtain a spinning melt. The heating temperatures of zones 1 to 5 of the screw extruder are 278° C. for zone 1, 282° C. for zone 2, 286° C. for zone 3, 288° C. for zone 4, and 290° C. for zone 5, respectively. The extrusion pressure of the screw extruder is 13 MPa, and the pressure after filtration is 9.4 MPa. The spinning melt is then transported to a spinning assembly for spinning (spinning temperature is 290° C., and the filter screen in the spinning assembly is a layer of 40 μm filter screen plus nine layers of 800 mesh filter screens) to form a primary filament bundle of a caterpillar cross section.

[0026] b. The raw silk bundle is subjected to post-heating, windless zone, annular air cooling, bundling and oiling treatment, and then pre-networking, drawing and shaping, and winding to obtain 50D / 36F caterpillar cross-section moisture-absorbing, quick-drying, anti-see-through, regenerated, fully matte fiber.

[0027] In step b, the post-heating temperature is 280°C, the height of the windless zone is 54mm, and the wind pressure of the annular air cooling is 45Pa. The height of the oil nozzle for bunching oiling is 1000mm, the distance between the bunching wire hook and the oil nozzle is 200mm, and the oil concentration ratio is 11%. The pre-network pressure is 0.08Mpa; the speed of the first drafting roller in the drafting setting is 2720m / min, and the speed of the second drafting roller is 2730m / min. The winding speed is 2710m / min, and the winding tension is 7cN.

[0028] Example 2

[0029] a. The crystallized and dried regenerated full-dull polyester (PET) chips (crystallization temperature is 155° C., drying temperature is 160° C., and drying wind pressure is 0.1 MPa) are uniformly mixed with a plastic-specific antistatic agent RF-112 accounting for 0.5 wt% of the mass of the regenerated full-dull polyester chips) and an antioxidant isorhamnetin accounting for 1 wt% of the mass of the regenerated full-dull polyester chips to obtain a premix, and the premix is ​​melted by extruding through a screw extruder to obtain a spinning melt, wherein the heating temperatures of the screw extruder zones 1 to 5 are 278° C. for zone 1, 282° C. for zone 2, 286° C. for zone 3, 288° C. for zone 4, and 290° C. for zone 5, respectively, and the extrusion pressure of the screw extruder is 13 MPa, and the pressure after filtration is 9.4 MPa; and then the spinning melt is transported to a spinning assembly for spinning (spinning temperature is 290° C., and the filter screen in the spinning assembly is a layer of 40 μm filter screen plus nine layers of 800 mesh filter screens) to form a primary filament bundle of a caterpillar cross section.

[0030] b. The raw silk bundle is subjected to post-heating, windless zone, annular air cooling, bundling and oiling treatment, and then pre-networking, drawing and shaping, and winding to obtain 50D / 36F caterpillar cross-section moisture-absorbing, quick-drying, anti-see-through, regenerated, fully matte fiber.

[0031] In step b, the post-heating temperature is 280°C, the height of the windless zone is 54mm, and the wind pressure of the annular air cooling is 45Pa. The height of the oil nozzle for bunching oiling is 1000mm, the distance between the bunching wire hook and the oil nozzle is 200mm, and the oil concentration ratio is 11%. The pre-network pressure is 0.08Mpa; the speed of the first drafting roller in the drafting setting is 2720m / min, and the speed of the second drafting roller is 2730m / min. The winding speed is 2710m / min, and the winding tension is 7cN.

[0032] Comparative Example 1

[0033] The fiber was prepared according to the method of Example 2, but without adding the special antistatic agent RF-112 for plastics.

[0034] Comparative Example 2

[0035] Fiber was prepared as in Example 2, but without the addition of isorhamnetin.

[0036] The fibers prepared in Example 1-Example 2 and Comparative Example 1-Comparative Example 2 were further tested for their performance. The results are shown in Table 1.

[0037] Table 1

[0038]

[0039] It can be seen from Table 1 that the fiber prepared by the present invention has good moisture absorption, quick drying and anti-see-through properties. At the same time, it is found that the plastic-specific antistatic agent RF-112 and the antioxidant isorhamnetin have a synergistic effect, which can further improve the antistatic and aging resistance of the fiber.

[0040] In addition, the fiber was prepared according to the method of Example 2, but the mass of isorhamnetin was replaced by the antioxidant BHT, which was recorded as Comparative Example 3. The fiber was prepared according to the method of Example 2, but the mass of BHT plastic special antistatic agent RF-112 was replaced by the antistatic agent SN, which was recorded as Comparative Example 4. It was found that the fabric surface charge of the fiber obtained in Comparative Example 3 was 0.212μC, and the breaking strength retention rate after 2.5KW, 800h xenon lamp accelerated aging was 90.2%, and the fabric surface charge of the fiber obtained in Comparative Example 4 was 0.223μC, and the breaking strength retention rate after 2.5KW, 800h xenon lamp accelerated aging was 91.4%.

[0041] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A method for preparing a caterpillar cross-section moisture-absorbing, quick-drying, anti-perspective, regenerated, fully matte fiber, characterized in that: The steps include: a. Evenly mixing the crystallized and dried regenerated full-dull polyester chips with an antistatic agent accounting for 0-1wt% of the mass of the regenerated full-dull polyester chips and an antioxidant accounting for 0-1.5wt% of the mass of the regenerated full-dull polyester chips to obtain a premix, extruding the premix through a screw extruder to melt it to obtain a spinning melt, and then conveying the spinning melt to a spinning assembly for spinning to form a primary filament bundle with a caterpillar cross section; b. The nascent tow is subjected to post-heating, windless zone, annular air cooling, bundling and oiling treatment, and then to pre-networking, drawing and shaping, and winding to obtain the caterpillar cross-section moisture-absorbing, quick-drying, anti-see-through, regenerated, fully matte fiber.

2. The method for preparing a caterpillar cross-section moisture-absorbing, quick-drying, anti-perspective, regenerated, fully matte fiber according to claim 1, characterized in that: The antistatic agent is RF-112, a special antistatic agent for plastics.

3. The method for preparing a caterpillar cross-section moisture-absorbing, quick-drying, anti-perspective, regenerated, fully matte fiber according to claim 1, characterized in that: The antioxidant is isorhamnetin.

4. The method for preparing a caterpillar cross-section moisture-absorbing, quick-drying, anti-perspective, regenerated, fully matte fiber according to claim 1, characterized in that: The crystallization temperature of recycled full-dull polyester chips is 155-160℃, the drying temperature is 158-163℃, and the drying wind pressure is 0.1Mpa.

5. The method for preparing a caterpillar cross-section moisture-absorbing, quick-drying, anti-perspective, regenerated, fully matte fiber according to claim 1, characterized in that: In step a, the heating temperatures of zones 1 to 5 of the screw extruder are 275-280° C. for zone 1, 280-285° C. for zone 2, 285-290° C. for zone 3, 285-290° C. for zone 4, and 288-292° C. for zone 5, respectively; the extrusion pressure of the screw extruder is 12-13.5 MPa, and the pressure after filtration is 9-10 MPa.

6. The method for preparing a caterpillar cross-section moisture-absorbing, quick-drying, anti-perspective, regenerated, fully matte fiber according to claim 1, characterized in that: In step a, the spinning temperature is 290° C., and the filter screen in the spinning assembly is a layer of 40 μm filter screen plus nine layers of 800 mesh filter screen.

7. The method for preparing a caterpillar cross-section moisture-absorbing, quick-drying, anti-perspective, regenerated, fully matte fiber according to claim 1, characterized in that: In step b, the post-heating temperature is 280° C., the height of the windless zone is 54 mm, and the wind pressure of the annular air cooling is 45 Pa.

8. The method for preparing a caterpillar cross-section moisture-absorbing, quick-drying, anti-perspective, regenerated, fully matte fiber according to claim 1, characterized in that: In step b, the height of the oil nozzle for cluster oiling is 1000 mm, the distance between the cluster wire guide hook and the oil nozzle is 200 mm, and the oil concentration ratio is 11%.

9. The method for preparing a caterpillar cross-section moisture-absorbing, quick-drying, anti-perspective, regenerated, fully matte fiber according to claim 1, characterized in that: In step b, the pre-network pressure is 0.07-0.09Mpa; during the stretching and shaping, the rotation speed of the first stretching roller is 2620-2800m / min, and the rotation speed of the second stretching roller is 2700-2800m / min.

10. The method for preparing a caterpillar cross-section moisture-absorbing, quick-drying, anti-perspective, regenerated, fully matte fiber according to claim 1, characterized in that: In step b, the winding speed is 2650-2790 m / min, and the winding tension is 6.5-7.5 cN.

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