Preparation method of fiber for producing high-quality fishing net

Abstract

The invention discloses a preparation method of fibers for high-quality fishing net production, and belongs to the technical field of fishing net production and processing equipment, and the preparation method comprises the following steps: (1) additive preparation, (2) raw material blending and melting treatment, (3) spinning treatment, and (4) heat preservation treatment. The preparation method is simple in overall process and suitable for large-scale popularization and application, and the prepared fibers are good in comprehensive performance, high in use stability and long in service life.

Description

Technical Field

[0001] The invention belongs to the technical field of fishing net production and processing equipment, in particular to a method for preparing high-quality fibers for fishing net production. Background Art

[0002] Fishing net fiber is the key material for making fishing nets. In the early days of fishing, natural fibers such as plant fibers (such as flax fiber, hemp fiber, etc.) and animal fibers (such as silk) were widely used. However, natural fibers are prone to rot and their performance gradually weakens after long-term use in water, so they cannot be used for a long time. Polylactic acid fiber is a non-petrochemical artificial fiber that can be put into industrial production in large quantities. It is converted from corn and other plant starches through lactic acid fermentation. As a green, rapidly degradable and recyclable natural resource. The development and utilization of corn fiber is in line with the world textile trend. It can not only save resources, but also adapt to people's psychological and physiological needs of enjoying life and pursuing nature, which is of great significance.

[0003] However, in actual commercial use, polylactic acid fibers, especially when processed into fibers for fishing nets, still have problems such as low thermal processing temperature, easy melting, easy deformation of finished products, poor strength, average dyeing quality, and high thermal shrinkage. These problems make it difficult to reflect the advantages of polylactic acid materials, making market promotion difficult and sales volume unable to increase. Summary of the invention

[0004] The object of the present invention is to provide a method for preparing high-quality fibers for producing fishing nets, so as to solve the deficiencies in the prior art.

[0005] The technical solution adopted by the present invention is as follows: A method for preparing high-quality fibers for fishing net production comprises the following steps: (1) Preparation of additives: a. First, calcine the bentonite, take it out, soak it in acid for activation, and then take it out for use; b. The bentonite treated in operation a is mixed with titanium sponge and silicon nitride and put into a ball mill for ball milling. After completion, the mixture A is removed for standby use; c. Evenly blend the mixed material A obtained in operation b with the polystyrene resin, and then subject it to foaming treatment. Finally, the foamed material is crushed to obtain the additive material for standby use; (2) Raw material blending and melting treatment: The additive prepared in step (1) is mixed with the polylactic acid chips, stirred evenly, and then put into a twin-screw extruder for blending and melt extrusion; (3) Spinning treatment: The material extruded by the twin-screw extruder in step (2) is subjected to spinning treatment through a spinneret, and irradiated during the spinning process, and then cooled and stretched to obtain a semi-finished fiber for use; (4) Insulation treatment: The semi-finished fiber obtained in step (3) is placed in an insulation box for insulation treatment, and taken out after 1 to 2 hours to obtain the finished fiber.

[0006] Furthermore, the temperature of the calcination treatment in step (1) operation a is controlled to be 800-860° C. and the calcination time is 1-1.2 h.

[0007] Furthermore, the acid solution in step (1) operation a is a phosphoric acid solution with a mass fraction of 4-6%; the amount of the phosphoric acid solution used is 3-5 times the total mass of the bentonite.

[0008] Furthermore, the bentonite, titanium sponge and silicon nitride described in step (1) operation b are mixed together in a corresponding weight ratio of 8-10:2-3:1-2; and the ball milling treatment lasts for 40-45 minutes.

[0009] Furthermore, the weight ratio of the mixed material A and the polystyrene resin when blended in step (1) operation c is 1:4-6; the foaming treatment is to add a foaming agent in an amount of 2-3% of the total weight of the mixed material A and the polystyrene resin, and the foaming treatment is performed for 30-35 minutes; the pulverization treatment is to control the particle size of the added material to not exceed 6 mm.

[0010] Furthermore, the foaming agent is an AC foaming agent.

[0011] Furthermore, the weight ratio of the additives described in step (2) to the polylactic acid chips when mixed together is 1:60-70; during the blending melt extrusion process, the temperature of zone 1 in the twin-screw extruder is controlled to be 200-205°C, the temperature of zone 2 is 215-220°C, the temperature of zone 3 is 230-235°C, the temperature of zone 4 is 240-245°C, and the temperature of the die head is 235-240°C.

[0012] Furthermore, the irradiation treatment in step (3) is specifically low-energy proton irradiation treatment, during which the irradiation energy is controlled to be 780-800 keV and the beam current is 2.5-3.0×10 15 cm -2 ·s -1 , the injection volume is 5.5~6.0×10 17 p / cm 2 .

[0013] Furthermore, during the heat preservation treatment in step (4), the temperature in the heat preservation box is controlled to be 60-65°C.

[0014] The present invention has the following beneficial effects: The invention changes the existing preparation process of the fiber and effectively improves the comprehensive performance of the fiber. In the preparation process, a special additive is first prepared, which is a modified filler processed with bentonite as the main material. The bentonite is first calcined to improve its specific surface area and adsorption capacity, and then activated to improve its surface activity. Then, the bentonite is blended and ball-milled with small particles of sponge titanium and silicon nitride, so that the sponge titanium and silicon nitride particles are inserted and fixed in the interlayer of the bentonite to form particles with high stability and high specific surface area. Subsequently, the additive is blended and foamed with polystyrene, which is beneficial to the dispersion and filling of the particles on the one hand, and on the other hand, the bonding strength between the additive and the fiber matrix is ​​enhanced, the overall mechanical quality of the fiber is improved, and the dyeability and processability of the fiber are also improved. Afterwards, during the spinning process, an irradiation process is performed, and low-energy proton irradiation is used to improve the bonding strength between the additive and the polylactic acid fiber, promote cross-linking and fixation between the components, and optimize the use characteristics of the fiber. The preparation method of the present invention has a simple overall process and is suitable for large-scale promotion and application. The prepared fiber has good comprehensive performance, high stability in use, long service life, and strong market competitiveness and economic benefits. DETAILED DESCRIPTION

[0015] The following will be described clearly and completely in conjunction with the technical solutions of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0016] A method for preparing high-quality fibers for fishing net production comprises the following steps: (1) Preparation of additives: a. First, calcine the bentonite, take it out, soak it in acid for activation, and then take it out for use; b. The bentonite treated in operation a is mixed with titanium sponge and silicon nitride and put into a ball mill for ball milling. After completion, the mixture A is removed for standby use; c. Evenly blend the mixed material A obtained in operation b with the polystyrene resin, and then subject it to foaming treatment. Finally, the foamed material is crushed to obtain the additive material for standby use; (2) Raw material blending and melting treatment: The additive prepared in step (1) is mixed with the polylactic acid chips, stirred evenly, and then put into a twin-screw extruder for blending and melt extrusion; (3) Spinning treatment: The material extruded by the twin-screw extruder in step (2) is subjected to spinning treatment through a spinneret, and irradiated during the spinning process, and then cooled and stretched to obtain a semi-finished fiber for use; (4) Insulation treatment: The semi-finished fiber obtained in step (3) is placed in an insulation box for insulation treatment, and taken out after 1 to 2 hours to obtain the finished fiber.

[0017] The temperature of the calcination treatment in step (1) operation a is controlled to be 800-860° C. and the calcination time is 1-1.2 h.

[0018] The acid solution in step (1) operation a is a phosphoric acid solution with a mass fraction of 4-6%; the amount of the phosphoric acid solution used is 3-5 times the total mass of the bentonite.

[0019] The bentonite, titanium sponge and silicon nitride described in step (1) operation b are mixed together in a weight ratio of 8-10:2-3:1-2; and the ball milling treatment lasts for 40-45 minutes.

[0020] The weight ratio of the mixed material A and the polystyrene resin when blended in step (1) operation c is 1:4-6; the foaming treatment is to add a foaming agent of 2-3% of the total weight of the mixed material A and the polystyrene resin, and the foaming treatment is carried out for 30-35 minutes; the pulverization treatment is to control the particle size of the added material to not exceed 6 mm.

[0021] The foaming agent is AC foaming agent.

[0022] The weight ratio of the additives and the polylactic acid chips when mixed together in step (2) is 1:60-70; during the blending and melt extrusion process, the temperature of zone 1 in the twin-screw extruder is controlled to be 200-205°C, the temperature of zone 2 is 215-220°C, the temperature of zone 3 is 230-235°C, the temperature of zone 4 is 240-245°C, and the temperature of the die head is 235-240°C.

[0023] The irradiation treatment described in step (3) is specifically low-energy proton irradiation treatment, during which the irradiation energy is controlled to be 780~800keV and the beam current is 2.5~3.0×10 15 cm -2 ·s -1 , the injection volume is 5.5~6.0×10 17 p / cm 2 .

[0024] During the heat preservation treatment described in step (4), the temperature in the heat preservation box is controlled to be 60~65°C. Example 1

[0025] A method for preparing high-quality fibers for fishing net production comprises the following steps: (1) Preparation of additives: a. The bentonite is first calcined at a temperature of 800°C and a calcination time of 1 hour. After being taken out, it is immersed in a 4% phosphoric acid solution with a mass fraction of 3 times its total mass for activation and then taken out for use; b. The bentonite treated in operation a was mixed with titanium sponge and silicon nitride in a weight ratio of 8:2:1 and put into a ball mill for ball milling. After 40 minutes, the mixture A was taken out for standby; c. Mix the mixture A obtained in operation b with polystyrene resin at a weight ratio of 1:4, then add 2% of the total weight of the mixture A and the polystyrene resin AC foaming agent, and foam for 30 minutes. Finally, crush the foamed material to control the particle size not exceeding 6mm, and obtain the additive material for standby use; (2) Raw material blending and melting treatment: The additive prepared in step (1) is mixed with the polylactic acid chips at a weight ratio of 1:60, stirred evenly, and then put into a twin-screw extruder for blending and melt extrusion. During this period, the temperature of the first zone of the twin-screw extruder is controlled to be 200° C., the temperature of the second zone is 215° C., the temperature of the third zone is 230° C., the temperature of the fourth zone is 240° C., and the temperature of the die head is 235° C.; (3) Spinning treatment: The material extruded by the twin-screw extruder in step (2) is subjected to spinning treatment through a spinneret. During the spinning treatment, low-energy proton irradiation treatment is also performed. During the process, the irradiation energy is controlled to be 780 keV and the beam current is 2.5×10 15 cm -2 ·s -1 , the injection volume is 5.5×10 17 p / cm 2 After completion, it is cooled and stretched to obtain semi-finished fiber for use; (4) Insulation treatment: The semi-finished fiber obtained in step (3) is placed in an insulation box at a temperature of 60°C for insulation treatment, and taken out after 1 hour to obtain the finished fiber. Example 2

[0026] A method for preparing high-quality fibers for fishing net production comprises the following steps: (1) Preparation of additives: a. The bentonite was first calcined at a temperature of 830°C and a calcination time of 1.1 h. After being taken out, it was immersed in a 5% phosphoric acid solution with a mass fraction of 4 times its total mass for activation and then taken out for use; b. The bentonite treated in operation a was mixed with titanium sponge and silicon nitride in a weight ratio of 9:2.5:1.6 and put into a ball mill for ball milling. After 43 minutes, the mixture A was taken out for standby; c. Mix the mixture A obtained in operation b with the polystyrene resin at a weight ratio of 1:5, then add 2.5% of the total weight of the mixture A and the polystyrene resin AC foaming agent, and foam for 33 minutes. Finally, crush the foamed material to control the particle size not exceeding 6mm, and obtain the additive material for standby use; (2) Raw material blending and melting treatment: The additive prepared in step (1) is mixed with the polylactic acid chips at a weight ratio of 1:65, stirred evenly, and then put into a twin-screw extruder for blending and melt extrusion. During this period, the temperature of the first zone in the twin-screw extruder is controlled to be 204°C, the temperature of the second zone is 218°C, the temperature of the third zone is 232°C, the temperature of the fourth zone is 244°C, and the temperature of the die head is 237°C; (3) Spinning treatment: The material extruded by the twin-screw extruder in step (2) is subjected to spinning treatment through a spinneret. During the spinning treatment, low-energy proton irradiation treatment is also performed. During the process, the irradiation energy is controlled to be 790 keV and the beam current is 2.8×10 15 cm -2 ·s -1 , the injection volume is 5.9×10 17 p / cm 2 After completion, it is cooled and stretched to obtain semi-finished fiber for use; (4) Insulation treatment: The semi-finished fiber obtained in step (3) is placed in an insulation box at a temperature of 62° C. for insulation treatment, and taken out after 1.5 hours to obtain the finished fiber. Example 3

[0027] A method for preparing high-quality fibers for fishing net production comprises the following steps: (1) Preparation of additives: a. The bentonite was first calcined at a temperature of 860°C and a calcination time of 1.2 h. After being taken out, it was immersed in a 6% phosphoric acid solution with a mass fraction of 5 times its total mass for activation and then taken out for standby use; b. The bentonite treated in operation a was mixed with titanium sponge and silicon nitride in a weight ratio of 10:3:2 and put into a ball mill for ball milling. After 45 minutes, the mixture A was taken out for standby; c. Mix the mixture A obtained in operation b with polystyrene resin at a weight ratio of 1:6, then add 3% of the total weight of the mixture A and the polystyrene resin AC foaming agent, and foam for 35 minutes. Finally, crush the foamed material to control the particle size not exceeding 6mm, and obtain the additive material for standby use; (2) Raw material blending and melting treatment: The additive prepared in step (1) is mixed with the polylactic acid chips at a weight ratio of 1:70, stirred evenly, and then put into a twin-screw extruder for blending and melt extrusion. During this period, the temperature of the first zone of the twin-screw extruder is controlled to be 205°C, the temperature of the second zone is 220°C, the temperature of the third zone is 235°C, the temperature of the fourth zone is 245°C, and the temperature of the die head is 240°C; (3) Spinning treatment: The material extruded by the twin-screw extruder in step (2) is subjected to spinning treatment through a spinneret. During the spinning treatment, low-energy proton irradiation treatment is also performed. During the process, the irradiation energy is controlled to be 800 keV and the beam current is 3.0×10 15 cm -2 ·s -1 , the injection volume is 6.0×10 17 p / cm 2 After completion, it is cooled and stretched to obtain semi-finished fiber for use; (4) Insulation treatment: The semi-finished fiber obtained in step (3) is placed in an insulation box at a temperature of 65°C for insulation treatment, and taken out after 2 hours to obtain the finished fiber.

[0028] Comparative Example 1 Compared with Example 2, in this comparative example 1, in the step (1) of preparing the additive, the processing of operation b is omitted, and other method steps are the same.

[0029] Comparative Example 2 Compared with Example 2, in this comparative example 2, in step (1) of preparing the additive, the processing of operation c is omitted, and other method steps are the same.

[0030] Comparative Example 3 Compared with Example 2, in step (2) of raw material blending and melting treatment, an equal amount of bentonite is used to replace the additive component. Other steps are the same.

[0031] Comparative Example 4 Compared with Example 2, in this comparative example 4, in the step (2) of raw material blending and melting, the additive component prepared in step (1) is omitted, and other method steps are the same.

[0032] Comparative Example 5 Compared with Example 2, in this comparative example 5, the low-energy proton irradiation treatment operation is omitted in the spinning treatment in step (3), and other method steps are the same.

[0033] In order to compare the effects of the present invention, the performance tests were performed on the fibers obtained in the above-mentioned Example 2 and Comparative Examples 1 to 4. The specific comparative data are shown in Table 1 below: Table 1

[0034] Note: The breaking strength described in Table 1 above was tested using a YG020A electronic single yarn strength tester, the stretching speed was controlled at 205 mm / min, the ambient temperature was 25°C, the humidity was 75%, and the pre-tension was 0.05 cN / dtex; the wrinkle recovery angle characterized the wrinkle resistance of the fiber, and was tested with reference to GB / T 3819-1997, using a YG541A wrinkle recovery tester; the dye uptake was the dye uptake of reactive brilliant red X-3B dye.

[0035] It can be seen from Table 1 above that the fiber prepared by the method of the present invention has significantly enhanced strength and other qualities, and its performance is effectively improved, making it highly competitive in the market.

[0036] The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the specification, should be within the protection scope of the present invention.

Claims

1. A method for preparing high-quality fiber for fishing net production, characterized in that: The following steps are involved: (1) Preparation of additives: a. First, calcine the bentonite, take it out, soak it in acid for activation, and then take it out for use; b. The bentonite treated in operation a is mixed with titanium sponge and silicon nitride and put into a ball mill for ball milling. After completion, the mixture A is removed for standby use; c. Evenly blend the mixed material A obtained in operation b with the polystyrene resin, and then subject it to foaming treatment. Finally, the foamed material is crushed to obtain the additive material for standby use; (2) Raw material blending and melting treatment: The additive prepared in step (1) is mixed with the polylactic acid chips, stirred evenly, and then put into a twin-screw extruder for blending and melt extrusion; (3) Spinning treatment: The material extruded by the twin-screw extruder in step (2) is subjected to spinning treatment through a spinneret, and irradiated during the spinning process, and then cooled and stretched to obtain a semi-finished fiber for use; (4) Insulation treatment: The semi-finished fiber obtained in step (3) is placed in an insulation box for insulation treatment, and taken out after 1 to 2 hours to obtain the finished fiber.

2. The method for preparing high-quality fiber for fishing net production according to claim 1, characterized in that: The temperature of the calcination treatment in step (1) operation a is controlled to be 800-860° C. and the calcination time is 1-1.2 h.

3. The method for preparing high-quality fiber for fishing net production according to claim 1, characterized in that: The acid solution in step (1) operation a is a phosphoric acid solution with a mass fraction of 4-6%; The amount of phosphoric acid solution used is 3 to 5 times the total mass of bentonite.

4. The method for preparing high-quality fiber for fishing net production according to claim 1, characterized in that: The bentonite, titanium sponge and silicon nitride described in step (1) operation b are mixed together in a weight ratio of 8-10:2-3:1-2; and the ball milling treatment lasts for 40-45 minutes.

5. The method for preparing high-quality fiber for fishing net production according to claim 1, characterized in that: The weight ratio of the mixed material A and the polystyrene resin when blended in step (1) operation c is 1:4-6; the foaming treatment is to add a foaming agent of 2-3% of the total weight of the mixed material A and the polystyrene resin, and the foaming treatment is carried out for 30-35 minutes; the pulverization treatment is to control the particle size of the added material to not exceed 6 mm.

6. The method for preparing high-quality fiber for fishing net production according to claim 5, characterized in that: The foaming agent is AC foaming agent.

7. The method for preparing high-quality fiber for fishing net production according to claim 1, characterized in that: The weight ratio of the additives and the polylactic acid chips when mixed together in step (2) is 1:60-70; during the blending and melt extrusion process, the temperature of zone 1 in the twin-screw extruder is controlled to be 200-205°C, the temperature of zone 2 is 215-220°C, the temperature of zone 3 is 230-235°C, the temperature of zone 4 is 240-245°C, and the temperature of the die head is 235-240°C.

8. The method for preparing high-quality fiber for fishing net production according to claim 1, characterized in that: The irradiation treatment described in step (3) is specifically low-energy proton irradiation treatment, during which the irradiation energy is controlled to be 780~800keV and the beam current is 2.5~3.0×10 15 cm -2 ·s -1 , the injection volume is 5.5~6.0×10 17 p / cm 2 .

9. The method for preparing high-quality fiber for fishing net production according to claim 1, characterized in that: During the heat preservation treatment described in step (4), the temperature in the heat preservation box is controlled to be 60~65°C.

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