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High-strength nylon 6 filaments based on one-step drafting process and preparation method of high-strength nylon 6 filaments

A nylon and high-strength technology, applied in the field of high-strength nylon 6 filament and its preparation, can solve the problems of cumbersome solvent removal, complex preparation process, reduced fiber toughness, etc., and achieves improved mechanical properties and processing properties, low initial modulus, high The effect of fiber flexibility

Active Publication Date: 2019-10-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The method described in the above patents either adopts chemical modification, or adopts chain extension method, or adopts dry spinning process, all of which have the effect of improving the strength of nylon 6, but there are high costs, complicated preparation process, and problems introduced to the preparation process. Solvent removal is cumbersome, etc., and usually leads to a decrease in fiber toughness while increasing strength

Method used

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  • High-strength nylon 6 filaments based on one-step drafting process and preparation method of high-strength nylon 6 filaments
  • High-strength nylon 6 filaments based on one-step drafting process and preparation method of high-strength nylon 6 filaments
  • High-strength nylon 6 filaments based on one-step drafting process and preparation method of high-strength nylon 6 filaments

Examples

Experimental program
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Effect test

Embodiment 1

[0026] This embodiment provides a high-strength nylon 6 filament based on a one-step drawing process and a preparation method thereof, which specifically includes the following process steps:

[0027] Step 1: In parts by weight, take 90 parts of nylon 6 slices and place them in a vacuum drying oven at 100°C for 8 hours, then put them in a blast drying oven at 105°C for 5 hours, take 10 parts of solid mannitol and mix them with The nylon 6 slices were stirred evenly, and the mixed mannitol / nylon 6 was fed into the twin-screw extruder for melt blending. The temperatures in each zone of the twin-screw extruder were: 230°C for the first zone, 240°C for the second zone, 245°C for the third zone, The fourth zone is 245°C, the fifth zone is 245°C, the speed of the main machine is 5.8rpm, and the speed of the feeder is 4.7rpm. At the same time, the extruded melt is pelletized by the pelletizer to prepare mannitol / nylon 6 masterbatch;

[0028] Step 2: In parts by weight, mix 5 parts of...

Embodiment 2

[0030] This embodiment provides a high-strength nylon 6 filament based on a one-step drawing process and a preparation method thereof, which specifically includes the following process steps:

[0031] Step 1: In parts by weight, take 90 parts of nylon 6 slices and place them in a vacuum drying oven at 100°C for 8 hours, then put them in a blast drying oven at 105°C for 5 hours, take 10 parts of solid sorbitol and mix them with The nylon 6 slices are stirred evenly, and the mixed sorbitol / nylon 6 is fed into the twin-screw extruder for melt blending. The temperatures in each zone of the twin-screw extruder are: 230°C for the first zone, 240°C for the second zone, 245°C for the third zone, The fourth zone is 245°C, the fifth zone is 245°C, the speed of the main machine is 5.8rpm, the speed of the feeder is 4.7rpm, and the extruded melt is pelletized by the pelletizer to prepare sorbitol / nylon 6 masterbatch;

[0032] Step 2: In parts by weight, mix 5 parts of the masterbatch obta...

Embodiment 3

[0036] This embodiment provides a high-strength nylon 6 filament based on a one-step drawing process and a preparation method thereof, which specifically includes the following process steps:

[0037]Step 1: In parts by weight, take 90 parts of nylon 6 slices and place them in a vacuum drying oven at 100°C for 8 hours, then put them in a blast drying oven at 105°C for 5 hours, take 10 parts of solid pentaerythritol and mix them with nylon at room temperature 6. Stir the slices evenly, and feed the mixed pentaerythritol / nylon 6 blend into the twin-screw extruder for melt blending. The temperatures in each zone of the twin-screw extruder are: 230°C for the first zone, 240°C for the second zone, and 245°C for the third zone. , 245°C in the fourth zone, 245°C in the fifth zone, the speed of the main machine is 5.8rpm, the speed of the feeder is 4.7rpm, and the extruded melt is pelletized by the pelletizer to prepare pentaerythritol / nylon 6 masterbatch;

[0038] Step 2: In parts by...

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Abstract

The invention provides a preparation method of high-strength nylon 6 filaments based on a one-step drafting process. The preparation method is characterized by comprising following steps: step 1, polyol and nylon 6 slices are mixed in proportion, mixed polyol / nylon 6 slices are fed into a twin-screw extruder for melt blending, extruded melt is pelletized by a pelletizer, and polyol modified nylon6 masterbatches are obtained; step 2, the nylon 6 masterbatches obtained in step 1 and the nylon 6 slices are mixed in proportion, the mixture is dried and then subjected to melt extrusion by the twin-screw extruder and enters a spinning manifold, melt is sprayed out through spinneret orifices, then enters a spinning channel and is subjected to air cooling, bundling, oiling, drafting, heat settingand coiling, and the high-strength nylon 6 filaments are prepared. Polyol is added for plasticizing modification of nylon 6, high-strength nylon 6 is prepared with the one-step drafting process, andthe prepared product has excellent thermodynamic properties, higher breaking strength and elongation at break and lower initial modulus.

Description

technical field [0001] The invention belongs to the field of chemical fiber preparation, and in particular relates to a high-strength nylon 6 filament based on a one-step drawing process and a preparation method thereof. Background technique [0002] Nylon 6 (PA6) is polyamide 6, also known as nylon 6. It is a kind of early industrialized nylon material, and its molecular structure is -NHCO(CH 2 ) 5 -, its molecular chain is usually in the shape of random coiled coils, and it is easy to form a folded chain sheet crystal structure when crystallized. It has excellent mechanical properties and is often widely used as a general-purpose plastic. Nylon 6 fiber is the first synthetic fiber material to appear in the world. It has a small specific gravity and has good plasticity, wear resistance and elasticity. Therefore, it is widely used in the fields of textile and clothing as an excellent textile material. [0003] Patent CN104844795 discloses a high-strength thermally conducti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/90D01F1/10D01D5/08D01D5/088D01D5/12D01D10/02
CPCD01D5/08D01D5/088D01D5/12D01D10/02D01F1/10D01F6/90
Inventor 李发学王雪梅吴德群王学利俞建勇
Owner DONGHUA UNIV
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