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Special resin for polypropylene random copolymer fibers and preparation method thereof

A polypropylene fiber, random copolymerization technology, applied in the field of materials, can solve the problems of low comonomer content, low resin flexibility, spinning continuity failure, etc., to achieve excellent product performance, improve spinning stability and continuous the effect of improving flexibility

Pending Publication Date: 2022-07-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain requirements for the matching between the comonomer content of the resin and its molecular weight: the comonomer content is low, and the flexibility of the resin is small, which cannot meet the requirements of the material; the comonomer content is too high. The small molecule random copolymer of the resin increases, which affects the molecular weight and distribution of the product, and causes a certain degree of damage to the continuity of spinning

Method used

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  • Special resin for polypropylene random copolymer fibers and preparation method thereof
  • Special resin for polypropylene random copolymer fibers and preparation method thereof
  • Special resin for polypropylene random copolymer fibers and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0091] The preparation method of the above-mentioned special resin for random copolymerization polypropylene fiber provided by the present invention comprises the following steps:

[0092] According to the above-mentioned raw material composition and dosage, the random copolymerized polypropylene fiber base resin, antioxidant, antistatic agent and acid absorber are pre-mixed, and then the pre-mixed raw materials and molecular weight regulator are added into the granulator for Melt extrusion to obtain a special resin for random copolymer polypropylene fibers.

[0093] The special resin for random copolymer polypropylene fiber obtained by the invention has a nominal fracture strain under tensile yield stress>10%, a molecular weight distribution of 2-3, a tensile breaking strength>17MPa, and a tensile fracture nominal strain>470%.

[0094] (1) Test method

[0095] GB / T 1040.2-2006 is used for the nominal strain at break, tensile strength at break, and nominal strain at break und...

Embodiment 1

[0113] The random copolymerized polypropylene fiber base resin is prepared according to the above-mentioned "(2) Preparation of random copolymerized polypropylene fiber base resin" method.

[0114] According to the ratio in Table 1, the random copolymer polypropylene fiber base resin, antioxidant, antistatic agent and acid absorbing agent are pre-mixed in the mixer, and then the pre-mixed raw materials and molecular weight are adjusted. The agent is added into a pelletizer for melt extrusion to obtain a special resin for random copolymerized polypropylene fibers. The test performance results of the special resin are shown in Table 3.

[0115] The structure and properties of the selected random copolymer polypropylene fiber base resin A1 meet the following requirements: the weight average molecular weight is 4.5×10 5 , isotacticity of 98.5%, molecular weight distribution of 3.7, nominal strain at break at tensile yield stress of 5.2%, comonomer content of 1.6 wt%, and melt flo...

Embodiment 2

[0121] Except for the components and amounts shown in Table 1, the rest are basically the same as those in Example 1.

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Abstract

The invention relates to a special resin for a polypropylene random copolymer fiber, which is prepared from the following raw materials in parts by weight: 100 parts of polypropylene random copolymer fiber base resin, 0.01-2 parts of a molecular weight regulator, 0.05-0.5 part of an antioxidant, 0.01-0.4 part of an antistatic agent and 0.01-0.4 part of an acid acceptor, the weight-average molecular weight of the random copolymer polypropylene fiber base resin is 3 * 10 < 5 >-4.5 * 10 < 5 >, the isotacticity is greater than or equal to 98.0%, the molecular weight distribution is 2-5, the fracture nominal strain under tensile yield stress is greater than 5%, the content of a comonomer is 1-3wt%, and the melt flow rate is 2-10g / 10min; the molecular weight regulator is at least one of cyclic ketone peroxide, aliphatic peroxide and aromatic peroxide. The special resin for the polypropylene random copolymer fiber has the advantages of narrow molecular weight distribution, low oligomer content, high tensile strength and the like.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a special resin for random copolymerization polypropylene fibers and a preparation method thereof. Background technique [0002] Polypropylene fiber has various excellent properties. In 2017, the domestic demand for polypropylene fiber material reached 1.5 million tons, of which the demand for medical high-end fiber material has reached 500,000 tons, mainly used in the hygiene and medical fields, such as high-end baby diapers, surgical gowns, etc.; [0003] With the continuous improvement of people's living standards, high-end fiber materials for medical and health use not only require good spinning processability, but also have higher and higher requirements for sensory properties such as odor and softness. At present, medical polypropylene fiber materials mainly come from imported products such as EXXON's PP3155E3, Basel's HP462S, South Korea's S905, etc., which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/46D01F1/10D01F1/09C08F210/06C08F210/16C08F4/649
CPCD01F6/46D01F1/10D01F1/09C08F210/06C08F210/16C08F2500/15C08F2500/12C08F2500/04C08F4/6494Y02P20/52
Inventor 葛腾杰吴双高宇新张明强杨国兴姜艳峰李瑞姜泽钰王熺
Owner PETROCHINA CO LTD