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Preparation method of polyethylene terephthalate for industrial yarn

A technology of polyethylene terephthalate and industrial yarn, which is applied in the field of preparation of polyethylene terephthalate for industrial yarn, and can solve the problems of easy breakage during heating, insufficient yarn strength, and easy breakage, etc. , to achieve sufficient esterification and polymerization reactions, strong tensile strength, and strong antistatic properties

Active Publication Date: 2021-10-15
江阴赛胜新材料有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Some of the existing PET products for spinning cannot meet the quality requirements of industrial yarn products in the automotive industry, mainly due to the fact that the yarn is easily broken during the spinning process, the strength of the spun yarn is not enough, and it is easy to break during the subsequent heating process, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0028] The preparation method of the polyethylene terephthalate for industrial yarn of the present embodiment comprises the following steps:

[0029] ①Prepare alkali metal acetate glycol solution and phosphorus compound glycol solution for use.

[0030] Potassium acetate and ethylene glycol are put into the additive preparation tank to prepare a potassium acetate ethylene glycol solution. The concentration of alkali metal ions in the prepared solution is 0.7% to 1.7% (1.0% in this example) by mass percentage. . The prepared potassium acetate ethylene glycol solution is used as a modifying agent in the esterification process.

[0031] The phosphorus compound and ethylene glycol are prepared into a phosphorus compound ethylene glycol solution, and the mass ratio of the phosphorus compound in the solution is 0.3% to 0.7%. The phosphorus compound is phosphoric acid or an alkali metal phosphate, and the phosphorus compound in this embodiment is potassium dihydrogen phosphate.

...

Embodiment 2）

[0048] The preparation method of polyethylene terephthalate for industrial yarn of the present embodiment is the same as Example 1, except that:

[0049] In step ①, sodium acetate and ethylene glycol are dropped into the additive preparation tank to prepare a sodium acetate ethylene glycol solution. The concentration of alkali metal ions in the prepared solution is 0.7% to 1.7% (in this embodiment, 1.2%).

[0050]Step 2. during batching, the concentration of sodium acetate in the slurry preparation tank is 3ppm.

[0051] According to the GBT / 14190-2015 detection standard, the content of diethylene glycol in the polyethylene terephthalate prepared in this example is 0.91%.

Embodiment 3）

[0053] The preparation method of polyethylene terephthalate for industrial yarn of the present embodiment is the same as Example 1, except that:

[0054] In step 1., potassium acetate and ethylene glycol are dropped into an additive preparation tank to prepare a potassium acetate ethylene glycol solution, and the concentration of alkali metal ions in the prepared solution is 1.0% by mass percentage.

[0055] Step 2. during batching, the concentration of potassium acetate in the slurry preparation tank is 6ppm.

[0056] According to the GBT / 14190-2015 testing standard, the content of diethylene glycol in the polyethylene terephthalate prepared in this example is 0.83%.

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Abstract

The invention discloses a preparation method of polyethylene terephthalate for industrial yarn. In the batching stage before the esterification reaction, alkali metal acetate is added, and the alkali metal acetate plays an important role in the esterification reaction. The obtained polyester product has less fuzz and broken ends in the subsequent spinning process, strong antistatic performance during drawing, strong tensile strength of the finished product, and reduced amount of waste yarn in the spinning process.

Description

technical field [0001] The invention relates to a preparation method of polyethylene terephthalate, in particular to a preparation method of polyethylene terephthalate for industrial yarn. Background technique [0002] Polyethylene terephthalate (PET) products are widely used in aerospace, automobile, clothing, packaging and other industries. In the automotive industry, they are mainly used in tire radials, seat belts, and airbags. These automotive industry products have very strict requirements on industrial yarn raw materials. Industrial yarn raw material manufacturers require polyethylene terephthalate raw materials to have good thermal stability, good anti-aging performance, and high tensile strength after being made into automotive products. , Dimensional stability is better. [0003] Some of the existing PET products for spinning cannot meet the quality requirements of industrial yarn products in the automotive industry, mainly because they are easy to break during th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183C08G63/86
CPCC08G63/183C08G63/866
Inventor 于维波傅丙立陈福银王忠利张强季建国邢印宁
Owner 江阴赛胜新材料有限公司
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