TWI758596B - Fabricating method of fiber - Google Patents

Abstract

A fabricating method of fiber is provided. The fabricating method of fiber includes evenly stirring and then drying an inorganic powder and a lubricant, so as to evenly coating the lubricant on the surface of the inorganic powder. Afterwards, stirring, mixing and drying the inorganic powder evenly coated with the lubricant and a nucleating agent and a copolymerized nylon material, and then performing the blending process to form the fiber-masterbatch. Next, performing a spinning process by using the fiber-masterbatch to form the fiber.

Description

Fiber manufacturing method

The present invention relates to a method for producing a fiber, and more particularly, to a method for producing a low-melting fiber capable of improving spinnability.

In the conventional preparation method of the low-melting nylon material, only a nucleating agent is added to promote the rapid crystallization of the hot-melt material. However, sticking may occur during fiber spinning, that is, a phenomenon in which the fiber and the spinner pulley are stuck together. Therefore, how to improve the spinnability of the hot-melt material and prevent the fibers from sticking during spinning is an important subject of current research.

The invention provides a fiber manufacturing method, which can improve the spinnability of the hot-melt material and effectively avoid sticking during fiber spinning.

The manufacturing method of the fiber of this invention includes the following steps. Stir the inorganic powder and lubricant evenly and then dry, so that the lubricant is evenly coated on the surface of the inorganic powder. After that, the inorganic powder and nucleating agent uniformly coated with the lubricant and the copolymerized nylon material are stirred, mixed and dried, and then the kneading process is carried out to form the fiber masterbatch. The fiber masterbatch is then used for a spinning process to form fibers

In an embodiment of the present invention, the spinning temperature in the spinning process is 195°C to 220°C.

In one embodiment of the present invention, the fiber specification is 57 den/24 to 140 den/24.

In one embodiment of the present invention, the fiber specification of the fibers is 57 den/24 to 70 den/24.

In one embodiment of the present invention, the fiber strength of the fibers is 2.16 grams per dain (g/d) to 3.14 grams per dain.

In an embodiment of the present invention, the melting point of the copolymerized nylon material is 90°C to 110°C.

In an embodiment of the present invention, the inorganic powder and the lubricant are stirred at a temperature of 160° C. for 2 hours at a stirring rate of 3000 rpm.

Based on the above, the present invention provides a fiber manufacturing method, wherein inorganic powder is added to the hot-melt material to increase its surface roughness and prevent the fibers from sticking during spinning, and at the same time, a lubricant is added to the hot-melt material to prevent The surface of the fiber has a lubricating effect during spinning, thereby avoiding the phenomenon of sticking between the fiber and the guide wheel of the spinning equipment. In this way, the spinnability of the fibers can be significantly improved.

In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, the following embodiments are given and described in detail with the accompanying drawings as follows.

FIG. 1 is a schematic flowchart of a manufacturing method of a fiber according to an embodiment of the present invention. Hereinafter, the manufacturing method of the fiber according to an embodiment of the present invention will be described in detail with reference to FIG. 1 .

Please refer to Figure 1. First, step S110 is performed, and the inorganic powder and the lubricant are evenly stirred and then dried, so that the lubricant is uniformly coated on the surface of the inorganic powder. In this way, it can be uniformly dispersed in the particles through the kneading process, thereby increasing the chance of the inorganic powder being exposed on the surface of the fiber in the subsequent fiber process, thereby increasing the surface roughness. The "uniform coating" referred to here is preferably, for example, forming a coating layer with a substantially uniform thickness of the lubricant on the surface of the inorganic powder.

In more detail, the uniformly stirred inorganic powder and lubricant are placed at a temperature of, for example, 160° C. for 2 hours for stirring, and the stirring rate is, for example, 3000 rpm, so that the lubricant is uniformly coated on the surface of the inorganic powder. superior. In this way, it can be more uniformly dispersed in the copolymerized nylon material (low melting point material) in the subsequent step S120 to improve the dispersibility, thereby improving the problem of spinning unevenness and improving the spinnability. In this embodiment, the lubricant may include stearic acid amide wax, the melting point of which is about 150°C. Therefore, when heated to 160°C, the lubricant can be uniformly coated on the surface of the inorganic powder. The material of the inorganic powder may include TiO ₂ , and its particle size is, for example, 200 nm to 300 nm. When the particle size of the inorganic powder is in the above range, it has better spinnability.

Next, please continue to refer to FIG. 1 , go to step S120 , stir, mix and dry the inorganic powder and nucleating agent uniformly coated with the lubricant and the copolymerized nylon material, and then perform the kneading process to form the fiber masterbatch. After that, using the formed fiber masterbatch for spinning process, the fiber can be made. More specifically, the pulley temperature is, for example, 15°C to 40°C (cold-drawn yarn without heating), and the spinning temperature is, for example, 195°C to 220°C. The fiber specification spun by the fiber manufacturing method of the present invention is, for example, 57 den/24 to 140 den/24.

In more detail, the inorganic powder and the nucleating agent uniformly coated with the lubricant are stirred and mixed with the copolymerized nylon material, for example, at a stirring speed of 600 rpm for 20 minutes, and then placed at a temperature of, for example, 65 ° C for 18 . hours to 24 hours for drying. The kneading temperature in the kneading process is, for example, 140°C to 190°C. In this embodiment, the nucleating agent may include a sodium phosphate salt. _The melting point of the copolymerized nylon material is, for example, 90°C to 110°C (low melting point material). (CH ₂ ) _a -COOH, wherein a is an integer of 6-10; H ₂ N-(CH ₂ ) _b -N ₂ H, wherein b is an integer of 6-12; HOOC-(CH ₂ ) ₆ -COOH; and (CH ₂ ) ₆ -CONH.

In the fiber manufacturing method of the present invention, based on the total weight of the fiber masterbatch, the addition amount of the copolymerized nylon material is, for example, 97 to 99 parts by weight, and the addition amount of the nucleating agent is, for example, 0.5 to 1 part by weight , the addition amount of the inorganic powder is, for example, 0.5 parts by weight, and the addition amount of the lubricant is, for example, 0.05 parts by weight to 0.2 parts by weight. When the addition amount of the inorganic powder is in the above range, it has better dispersibility; when the addition amount of the lubricant is in the above range, it has better spinnability. resulting in decreased spinnability.

Hereinafter, the manufacturing method of the fiber proposed by the above-mentioned embodiment will be described in detail by means of an experimental example. However, the following experimental examples are not intended to limit the present invention. Experimental example

In order to prove that the fiber manufacturing method proposed by the present invention can improve the spinnability, this experimental example is specially made below.

It must be noted that, since the manufacturing method of the fiber has been described in detail above, the following description of the fiber preparation is omitted for convenience of explanation. Preparation of Fiber Masterbatch

According to the content of each component listed in Table 1 below, the fiber masterbatches of Examples 1 to 2 and Comparative Examples 1 to 9 were prepared. In Table 1, the copolymerized nylon material A is 2468A produced by Arkema, the copolymerized nylon material B is 730 produced by Evonik Industries AG, and the chain extender is styrene-linked Branch maleic anhydride, the particle size of inorganic powder A is 200 nm to 300 nm, and the particle size of inorganic powder B is about 700 nm. Table 1

Melting points and relative viscosities were measured for the fiber masterbatches of Examples 1-2 and Comparative Examples 1-9. The melting point is carried out in the ASTM D3418 standard test method, the test weight of the fixed test piece is 5 mg, and the differential scanning calorimetry (Differential Scanning Calorimetry, DSC) is used at a heating rate of 10 °C per minute, from room temperature to 300 °C for detection and analysis . The relative viscosity is measured by the ASTM D4603 standard test method. The modified nylon granules are heated and dissolved in a solvent of 96% sulfuric acid until uniform, and the time required to change from the upper scale to the lower scale in the viscometer is measured. Before the test, the viscometer must be placed in a constant temperature water bath at 25±0.05°C for 20 minutes, and then the same viscometer is used to measure the required amount of the test sample and pure solvent from the upper scale to the lower scale at the same temperature. time, the ratio of the two times is the relative viscosity (RV). The melting points and relative viscosities of the fiber masterbatches of Examples 1 to 2 and Comparative Examples 1 to 9 are listed in Table 2.

The fiber masterbatches of Examples 1 to 2 and Comparative Examples 1 to 9 were subjected to a spinning process and the spinnability was observed. At the same time, measure the size/strength/elongation of the spun fibers, and the fiber strength and elongation are carried out in the standard test method of ASTM D2256. The spinnability, spinning temperature and fiber specification/strength/elongation are shown in Table 2, wherein the listed three-stage spinning temperatures are feed temperature, conveying temperature and spinning mouth temperature, respectively.

In Table 2, the results of the spinnability evaluation are represented by the symbols "◎", "△" or "×", and the meanings of the symbols are as follows: ◎: Spinnable △: The fibers are slightly sticky × : Fiber sticky yarn, fiber can not be cured or the phenomenon of spinning is serious Table 2

As shown in Table 1 and Table 2 above, Examples 1 and 2 are fiber masterbatches prepared by the fiber manufacturing method of the present invention, which have good spinnability, and do not have fiber sticky yarn, fibers that cannot be cured or Serious problems such as floating silk phenomenon. In contrast, the problems of fiber sticking occurred in Comparative Examples 1 to 4 without adding inorganic powder and lubricant. In addition, Comparative Example 5 added an excessive amount of lubricant (beyond the range of 0.05 to 0.2 parts by weight), and there was a problem that the fibers could not be cured. In Comparative Example 6, when an excessive amount of inorganic powder was added (out of the range of 0.5 parts by weight), there was a serious problem of the floating phenomenon. In Comparative Example 7 and Comparative Example 8, inorganic powder B with a particle size of about 700 nm was used instead of inorganic powder A with a particle size of 200 nm to 300 nm proposed in the present invention, so the problem of fiber sticking occurred. .

Based on the above, the present invention provides a fiber manufacturing method, wherein inorganic powder is added to the hot-melt material to increase its surface roughness and prevent the fibers from sticking during spinning, and at the same time, a lubricant is added to the hot-melt material to prevent The surface of the fiber has a lubricating effect during spinning, thereby avoiding the phenomenon of sticking between the fiber and the guide wheel of the spinning equipment. More specifically, in the fiber manufacturing method of the present invention, the inorganic powder and the lubricant are uniformly stirred and then dried, so that the lubricant is uniformly coated on the surface of the inorganic powder. In this way, the dispersibility can be improved, the problem of spinning irregularity can be improved, and the spinnability can be improved.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the appended patent application.

Steps for S110, S120‧‧‧

FIG. 1 is a schematic flowchart of a manufacturing method of a fiber according to an embodiment of the present invention.

Steps for S110, S120‧‧‧

Claims (7)

A method of manufacturing a fiber, comprising: Stir the inorganic powder and lubricant evenly and then dry, so that the lubricant is evenly coated on the surface of the inorganic powder; stirring, mixing and drying the inorganic powder and nucleating agent uniformly coated with the lubricant and the copolymerized nylon material, and then performing a kneading process to form a fiber masterbatch; and A spinning process is performed using the fiber masterbatch to form the fibers. The fiber manufacturing method according to claim 1, wherein the spinning temperature in the spinning process is 195°C to 220°C. The fiber manufacturing method as claimed in claim 1, wherein the specification of the fiber is 57 den/24 to 140 den/24. The manufacturing method of the fiber according to claim 1, wherein the fiber specification of the fiber is 57 den/24 to 70 den/24. The method for producing a fiber as claimed in claim 1, wherein the fiber has a fiber strength of 2.16 grams per dan (g/d) to 3.14 grams per dan. The fiber manufacturing method according to the claim 1, wherein the melting point of the copolymerized nylon material is 90°C to 110°C. The method for producing fibers according to claim 1, wherein the inorganic powder and the lubricant are stirred at a temperature of 160° C. for 2 hours at a stirring rate of 3000 rpm.

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