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RPETG heat shrinkage label film and preparation method thereof

A technology of heat shrinking and shrinking film, applied in the field of RPETG heat shrinkable label film and its preparation, to achieve the effect of recycling waste

Pending Publication Date: 2022-06-28
JIANGSU GUANGHUI PACKAGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the main challenges faced by PET (G) chemical recycling process technology are: reducing production costs, developing simpler process routes, and how to fully recycle various other substances in composite PET materials

Method used

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  • RPETG heat shrinkage label film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: a kind of RPETG heat shrinkable label film, it is characterized in that, comprises main material and auxiliary material, main material comprises the raw material of following mass fractions, 55 parts of PET recycled bottle flakes, 10 parts of PETG shrink film scraps, 25 parts of powder coatings Saturated polyester resin is used; auxiliary materials include transesterification catalyst, polycondensation catalyst, phase transfer catalyst, and catalytic accelerator. The amount of transesterification catalyst is 3ppm of the main material, the amount of polycondensation catalyst is 6ppm of the main material, and the amount of phase transfer catalyst is mainly 3ppm of the feed, and the amount of the catalyst promoter is 2ppm of the main feed. Transesterification catalyst is zinc acetate; polycondensation catalyst is titanium-based catalyst tetrabutyl titanate; phase transfer catalyst is benzyl triethylamine chloride (TEBA); catalytic promoter is organic guanidine...

Embodiment 2

[0035]Embodiment 2: a kind of RPETG heat shrinkable label film, it is characterized in that, comprises main material and auxiliary material, main material comprises the following raw materials by mass, 55 parts of PET recycled bottle flakes, 10 parts of PETG shrink film scraps, 25 parts of powder coating Saturated polyester resin is used; auxiliary materials include transesterification catalyst, polycondensation catalyst, phase transfer catalyst, catalytic accelerator, toner and stabilizer, the amount of transesterification catalyst is 3ppm of the main material, and the amount of polycondensation catalyst is 6ppm of the main material, The amount of the phase transfer catalyst is 3 ppm of the main material, the amount of the catalytic accelerator is 2 ppm of the main material; the amount of the toner is 5 ppm of the main material, and the amount of the stabilizer is 45 ppm of the main material. The transesterification catalyst is manganese acetate; the polycondensation catalyst ...

Embodiment 3

[0036] Embodiment 3: a kind of RPETG heat-shrinkable label film, it is characterized in that, comprises main material and auxiliary material, main material comprises the following raw materials in parts by mass, 58 parts of PET recycled bottle flakes, 12 parts of PETG shrink film scraps, 28 parts of powder coatings Saturated polyester resin; auxiliary materials include transesterification catalyst, polycondensation catalyst, phase transfer catalyst, catalytic accelerator, toner and stabilizer, the amount of transesterification catalyst is 4ppm of the main material, and the amount of polycondensation catalyst is 7ppm of the main material, The amount of the phase transfer catalyst is 4 ppm of the main material, the amount of the catalyst accelerator is 2.5 ppm of the main material; the amount of the toner is 7 ppm of the main material, and the amount of the stabilizer is 52 ppm of the main material. The transesterification catalyst is zinc acetate; the polycondensation catalyst i...

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Abstract

The invention discloses an RPETG thermal shrinkage label film, which comprises a main material and an auxiliary material, the main material comprises the following raw materials by mass: 55-60 parts of PET recycled bottle flake, 10-15 parts of PETG shrinkage film leftover material, and 25-30 parts of saturated polyester resin for powder coating; the auxiliary materials comprise a transesterification catalyst, a polycondensation catalyst, a phase transfer catalyst and a catalytic promoter, the amount of the transesterification catalyst is 3-5 ppm of that of the main materials, the amount of the polycondensation catalyst is 6-8 ppm of that of the main materials, the amount of the phase transfer catalyst is 3-5 ppm of that of the main materials, and the amount of the catalytic promoter is 2-3 ppm of that of the main materials. According to the invention, by combining the structure and material performance characteristics of PETG for the heat-shrinkable label film, through scientific preparation of a transesterification and polycondensation catalysis system and through melt polycondensation reaction, PET bottle flake reclaimed materials, PETG film leftover materials and saturated polyester resin for powder coating are prepared into a new RPETG raw material, and then the new RPETG raw material is prepared into the RPETG heat-shrinkable label film through curtain coating and stretching.

Description

technical field [0001] The invention relates to the field of heat shrinkable label films, in particular to a RPETG heat shrinkable label film and a preparation method thereof. Background technique [0002] The R in RPET (G) is the abbreviation of Recycle in English, which means recycling and recycling. PET, as the most successful recycling polymer material at present, realizes real recycling mainly through chemical recycling, in addition to simple physical and mechanical recycling. [0003] PET chemical recycling is to depolymerize waste PET plastic or / and chemical fiber products into terephthalic acid (PTA), dimethyl terephthalate (DMT) and ethylene glycol through hydrolysis, alcoholysis, saccharolysis and other technological means. Monomers or low molecular substances such as alcohol (EG), and then synthesize a new polyester polymer material RPET through polymerization technology. [0004] The advantage of chemical recycling is that it can realize the complete recycling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/00C08K5/3462C08K5/3447C08K5/31C08J5/18C08G63/83C08G63/85C08G63/87
CPCC08J5/18C08G63/83C08G63/85C08G63/87C08J2367/02C08J2467/02C08J2467/00C08K5/3462C08K5/3447C08K5/31
Inventor 杨涛陈丽颖周军锋范琪
Owner JIANGSU GUANGHUI PACKAGE
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