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Polyester film capable of being subjected to heat seal directly and preparation method

A polyester film and a direct technology, applied in the field of polyester film and its preparation, can solve the problems of incapability of self-heat sealing, etc., and achieve the effects of saving composite processes, reducing costs, and improving production and living standards

Active Publication Date: 2013-01-16
ZHEJIANG QIANGMENG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the defect that ordinary polyester film products in the prior art cannot be self-sealed. In order to be used in heat-sealed occasions, it usually requires cumbersome and costly compounding procedures with other resins, and provides a Heat sealing at a temperature of 120 degrees not only saves the tedious and costly compounding process of ordinary polyester film and other resins, saves the use and waste of resources, but also reduces the cost of the entire food packaging material, and is more hygienic. A kind of directly heat-sealable polyester film and preparation method thereof

Method used

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  • Polyester film capable of being subjected to heat seal directly and preparation method
  • Polyester film capable of being subjected to heat seal directly and preparation method
  • Polyester film capable of being subjected to heat seal directly and preparation method

Examples

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Effect test

Embodiment 1

[0030] A polyester film that can be directly heat-sealed, comprising an ABC three-layer structure, the B layer is an intermediate core layer, and the material is PET ultra-glossy polyester chips; the A layer is a surface heat-sealing layer, and the material is copolymerized PETG Polyester chips; C layer is an anti-blocking layer, and the materials include PET anti-blocking agent masterbatch chips and PET ultra-gloss polyester chips.

[0031] C layer anti-blocking layer, the material has the following components by mass percentage: 30%-60% of PET anti-blocking agent masterbatch chips and 40%-70% of PET ultra-gloss polyester chips.

[0032] The thickness of layer B accounts for 70% to 80%, the thickness of layer A accounts for 10% to 20%, and the thickness of layer C accounts for 10% to 20%.

[0033] The co-polymer PETG polyester chip of the surface heat sealing layer of the A layer is composed of dimethyl terephthalate (DMT), ethylene glycol (EG), silicon dioxide (SiO2) and 1,4-c...

Embodiment 2

[0051] A preparation method of a polyester film that can be directly heat-sealed, in parts by weight: adding 22 parts by mass of 1,4 cyclohexanedimethanol (CHDM) and 3 parts by mass of silicon dioxide (SiO2) In 23 parts of ethylene glycol (EG), stir and disperse, then disperse and homogenize at high speed, and after using ultrasonic vibration and disperse, send into the main reaction system polymerization kettle; add 100 parts of dimethyl terephthalate (DMT) Stir and mix, then add 2 parts (PTA weight) of antimony trioxide and triphenyl phosphite, and replace with nitrogen (N2) 3 times after sealing. Under the pressure of 600Pa in the kettle, the temperature was raised to 180°C, and the esterification reaction was carried out for 0.8h. After the esterification reaction, the excess ethylene glycol (EG) was recovered; Cooling and dicing to obtain copolymerized PETG polyester chips.

[0052] The prepared copolymerized PETG polyester chips are weighed according to the mass percent...

Embodiment 3

[0054] The difference between this example and Example 2 is that the mass ratio of the extruded materials from the main extruder and the two auxiliary twin-screw extruders is 15:70:15, the thickness of the heat sealing layer of the 20um film A layer is 3.0um, and the thickness of the C layer is 3.0um. The thickness of the anti-stick layer is 3.0um.

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Abstract

The invention relates to a polyester film and a preparation method thereof and particularly discloses a polyester film capable of being subjected to heat seal direction and a preparation method. The polyester film comprises a layer A, a layer B and a layer C, wherein the layer B is a middle core layer and made of a PET (polyethylene terephthalate) ultra-glazed polyester slice, the layer A is a surface heat-seal layer and made of a copolymerized PETG (polyethylene terephthalate glycol) polyester slice, and the layer C is an anti-blocking layer and made of a PET anti-blocking agent master batch slice and a PET ultra-glazed polyester slice. The preparation method includes steps of preparing corresponding polyester slices, extruding and drawing via an extruder, forming with cooling, crystallizing, drawing to remove scrap edges, treating coronas, detecting the thickness and the like.

Description

technical field [0001] The invention relates to a polyester film and a preparation method thereof, in particular to a polyester film that can be directly heat-sealed and a preparation method thereof. Background technique [0002] With the development of social economy and the improvement of people's living standards, the requirements for environmentally friendly packaging materials are getting higher and higher. PET (polyester) is a world-recognized environmentally friendly green material. The directly heat-sealable polyester film made of modified raw materials and special production processes is a high-performance, economical and environmentally friendly new product innovated by my country's film industry and heat-sealing film industry. Ordinary polyester film products have the defect that they cannot be self-sealed. In order to be used in heat-sealing applications, they usually require a tedious and expensive compounding process with other resins, which greatly limits the...

Claims

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Application Information

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IPC IPC(8): B32B27/36B32B27/18B29C69/02B29C47/06B29C55/14C08L67/02C08G63/183C08G63/78C08K3/36C08K5/526
Inventor 易志龙彭齐飞邱亚竞袁慎朋
Owner ZHEJIANG QIANGMENG IND
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