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Assistant for improving heat absorption performance of PET polyester chip and production method of PET bottle

A polyester chip, heat-absorbing technology, used in the production of additives and PET bottles, can solve problems such as reducing the L value and affecting the visual appearance of PET containers, achieving excellent thermal stability, and more bluish appearance and appearance. Excellent phase and thermal stability

Pending Publication Date: 2021-07-27
上海翰晖新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional polyester heat-absorbing additives usually use infrared-absorbing compounds that are beneficial to increase the reheating rate of the resin, such as carbon black, metal antimony, iron oxide, activated carbon, etc. These traditional heat-absorbing substances, although for the The heat-absorbing effect is helpful to some extent, but it often causes the dark turbidity and gray-black appearance of the finished product or packaging container, which reduces the L value and affects the visual appearance of the PET container.

Method used

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  • Assistant for improving heat absorption performance of PET polyester chip and production method of PET bottle
  • Assistant for improving heat absorption performance of PET polyester chip and production method of PET bottle
  • Assistant for improving heat absorption performance of PET polyester chip and production method of PET bottle

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Effect test

Embodiment 1

[0025] The invention proposes an auxiliary agent for improving the heat-absorbing performance of PET polyester chips, which is formed by adding titanium nitride or zinc nitride to the auxiliary agent to form a mixed auxiliary agent.

[0026] The present invention also proposes a kind of production method of PET bottle, comprises the following steps:

[0027] Step 1: Mix titanium nitride or zinc nitride with one or both of ethylene glycol and isobutanol to form a mixed solution;

[0028] Step 2: Stir the purified terephthalic acid and ethylene glycol in the slurry mixing tank according to the set density or molar ratio, pump them into the slurry feeding tank, and the slurry feeding tank enters through the pump through the slurry injection nozzle In the esterification tank, under the temperature condition of 265°C±5°C, the slurry is homogeneously mixed and reacted in the esterification tank to obtain oligomers; the by-products and oligomers after the reaction are separated throu...

Embodiment 2

[0039] Another domestic slicing factory tested slices without adding any endothermic agent, adding ordinary carbon black endothermic agent, and adding slices of the present invention. The power consumption performance was compared.

[0040] Table 2 Comparison of power consumption for blowing of preforms with different slices

[0041]

[0042] Compared with ordinary slices without adding heat-absorbing agent, the slices added with the high heat-absorbing agent of the present invention can save more than 35% of energy consumption. And it has a higher transparent appearance than carbon black heat absorbing slices.

Embodiment 3

[0044] The test verifies the change of the L value (brightness) of the slice with the increasing proportion of the heat absorbing agent, so as to find a reasonable adding range that can balance the heat absorbing performance and appearance brightness of PET.

[0045] Such as figure 1 As shown, within the effective addition range of 2-6ppm, the heat absorption performance and appearance brightness requirements of slices can be better balanced. Preferably, the addition of active ingredients at 3-5ppm is a recommended reasonable addition ratio.

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Abstract

The invention provides an assistant for improving the heat absorption performance of a PET polyester chip and a production method of a PET bottle. According to the assistant for improving the heat absorption performance of the PET polyester chip and the production method of the PET bottle, titanium nitride or zinc nitride is added into the assistant to form a mixed assistant, so the heat absorption performance of the PET polyester chip is more uniform; in addition, the color of titanium nitride / zinc nitride is more close to light blue compared with a traditional carbon black heat absorber, so compared with a traditional carbon black heat absorption additive chip, the chip of the invention has the advantages of higher L value, lower b value, higher transparency and higher degree of fineness; and comprehensive cost is lower, and 30%-50% of raw material cost is saved for manufacturers.

Description

technical field [0001] The invention relates to the technical field of PET bottle preparation, in particular to an auxiliary agent for improving the heat absorption performance of PET polyester chips and a production method of the PET bottle. Background technique [0002] Polyester chips, also known as polyethylene terephthalate, or PET for short, are crystalline saturated polyesters. They are milky white or light yellow, highly crystalline polymers. APET, RPET and PETG. It has excellent physical and mechanical properties in a wide temperature range, excellent electrical insulation, and even at high temperature and high frequency, its electrical properties are still good, but its corona resistance is poor, creep resistance, fatigue resistance, Excellent friction resistance and dimensional stability. [0003] Bottle-grade polyester chips are usually injection-blow-molded in two steps. First, they are melted and injected into preforms at high temperature, and then heated and...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/78C08K3/28C08L67/02
CPCC08G63/183C08G63/78C08K3/28
Inventor 史修臣
Owner 上海翰晖新材料有限公司
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