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Process for preparing high-transparency PET material

A preparation process and transparent technology, applied in the field of preparation of high-transparency PET materials, can solve the problems of poor surface gloss of PET products, inability to use transparent products, and limited use range, etc., achieve excellent transparency, improve transparency and surface gloss , Improve the effect of environmental adaptability

Inactive Publication Date: 2016-07-06
ZHUHAI HUARUN PACKAGING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it cannot be used to make thicker transparent products. At the same time, the surface gloss of PET products is relatively poor, and the wear resistance is not good. These characteristics limit its scope of use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Add 8 kilograms of lactic acid, 40 grams of tin protochloride in 20 liters of polymerization reactors, turn on the stirring motor, raise the reaction temperature to 100 degrees, the system pressure is 6000pa, and the reaction time is controlled at 5 hours; then raise the reaction temperature to 150 ℃, the system pressure is 3000pa, and the reaction time is controlled at 6 hours; continue to raise the reaction temperature to 180°C, the system pressure is 100pa, and the reaction time is controlled at 8 hours. The process water generated by the reaction is separated and removed by the process tower.

[0032] After the above reaction is completed, feed nitrogen into the reactor to control the pressure in the reactor to normal pressure, add 50 g of polyphosphoric acid-ethylene glycol solution into the reactor, then raise the reaction temperature to 200 ° C, and control the reaction pressure to 50 Pa , to continue the polycondensation reaction, and the generated process water ...

Embodiment 2

[0036] Add 8 kg of lactic acid and 50 g of stannous octoate into a 20-liter polymerization reactor, turn on the stirring motor, increase the reaction temperature to 100 degrees, the system pressure is 6000 pa, and the reaction time is controlled at 5 hours; then increase the reaction temperature to 150 ° C , the system pressure is 3000pa, and the reaction time is controlled at 6 hours; continue to raise the reaction temperature to 180°C, the system pressure is 100pa, and the reaction time is controlled at 8 hours. The process water generated by the reaction is separated and removed by the process tower.

[0037] After the above reaction is completed, feed nitrogen into the reactor to control the pressure in the reactor to normal pressure, add 60 g of trimethyl phosphate-ethylene glycol solution to the reactor, and then raise the reaction temperature to 200 ° C to control the reaction pressure It is 50pa, and the polycondensation reaction continues, and the generated process wa...

Embodiment 3

[0041] Add 8 kilograms of lactic acid, 40 grams of tin protochloride in 20 liters of polymerization reactors, turn on the stirring motor, raise the reaction temperature to 100 degrees, the system pressure is 6000pa, and the reaction time is controlled at 5 hours; then raise the reaction temperature to 150 ℃, the system pressure is 3000pa, and the reaction time is controlled at 6 hours; continue to raise the reaction temperature to 180°C, the system pressure is 100pa, and the reaction time is controlled at 8 hours. The process water generated by the reaction is separated and removed by the process tower.

[0042] After the above reaction is completed, feed nitrogen into the reactor to control the pressure in the reactor to normal pressure, add 65 g of triphenyl phosphate-ethylene glycol solution to the reactor, then increase the reaction temperature to 200 ° C, and control the reaction pressure It is 50pa, and the polycondensation reaction continues, and the generated process w...

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Abstract

The present invention aims to provide a modified polyester material. The highly transparent PET material of the invention is prepared by reactive co-extrusion processing of polylactic acid and low melting point polyethylene terephthalate under the action of polybasic anhydride chain extender. The highly transparent PET material of the present invention has the tenacity, tensile strength, impact strength of polyester and the high gloss, high transparency and hardness of polylactic acid, and the cost is moderate, which is conducive to large-scale industrial production and wide market promotion application. The invention can be applied to the technical field of the preparation process of the highly transparent PET material.

Description

technical field [0001] The invention relates to a preparation process of a highly transparent PET material. Background technique [0002] Polyethylene terephthalate (PET) is a commonly used packaging material. It uses terephthalic acid and ethylene glycol as main raw materials and is produced through esterification and polycondensation processes. It has excellent toughness, tensile, impact strength, wear resistance, electrical insulation. Due to its good toughness, light weight, airtightness, acid and alkali resistance, etc., it has become a common container for soft drinks, fruit juices, and carbonated drinks in recent years. [0003] Polyethylene terephthalate macromolecular chains rotate to form a variety of complex spatial conformations and rotational isomers, and the chains are intertwined, which makes PET crystallize slowly at room temperature, so it can be used to make transparent Products, but on the other hand, the molecular chain structure of PET has a high degre...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08G63/08C08G63/183C08K3/32C08K5/521C08K5/523
CPCC08L67/02C08L2201/08C08L2201/10C08L2205/02
Inventor 陈国康张成礼曾荣温杰文
Owner ZHUHAI HUARUN PACKAGING MATERIALS
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