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Biaxially-oriented knurling thermal composite polyester film and preparation method thereof

A technology of biaxial stretching and polyester film, applied in the field of polyester film, can solve the problems of atmospheric environment and human health adverse effects, and achieve the effect of meeting the needs of embossing process, reducing crystallinity and heat distortion temperature

Pending Publication Date: 2022-04-15
杭州大东南高科新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the continuous strengthening of the country's environmental protection requirements, PVC embossed composite films have begun to bear pressure in terms of environmental protection. The main reasons are as follows: (1) The monomer VCM (vinyl chloride) of PVC is a strong carcinogen. Process improvement. At present, the VCM content of PVC produced in various countries can reach the non-toxic level of <1ppm, but people are still cautious.
(2) PVC is a chlorine-containing material, and its waste will generate dioxins due to incomplete combustion (low temperature combustion) during the incineration process, and dioxins are carcinogens, which will have adverse effects on the atmospheric environment and human health

Method used

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  • Biaxially-oriented knurling thermal composite polyester film and preparation method thereof
  • Biaxially-oriented knurling thermal composite polyester film and preparation method thereof

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preparation example Construction

[0032] The raw materials for the preparation of the upper surface layer include the following components in mass fractions: 84.5% to 94.9% of non-crystalline PET copolyester, 5% to 15% of polyethylene terephthalate, and 0.1% to 0.5% of antiblocking agent %;

[0033] The raw materials for preparing the core layer include the following components in mass fractions: polyethylene terephthalate 70%-100%, non-crystalline PET copolyester 0-30%;

[0034] The raw materials for the preparation of the lower surface layer include the following components in mass fractions: 69.5% to 99.9% of polyethylene terephthalate, 0 to 30% of non-crystalline PET copolyester, and 0.1% to 0.5% of anti-blocking agent .

[0035] figure 1 Schematic diagram of the structure of the biaxially stretched embossable thermal composite polyester film provided by the present invention, wherein A is the upper surface layer, B is the core layer, C is the lower surface layer, and the following combination figure 1 ...

Embodiment 1

[0060] In terms of mass fraction, the specific component contents of each layer of the present embodiment are as follows:

[0061] Upper surface component content: 1,4-cyclohexanedimethanol (CHDM) modified polyester copolymer (PETG) 94.7%, polyethylene terephthalate (PET) 5%, SiO 2 (Silicon dioxide) anti-blocking agent 0.3%, wherein the central particle diameter of silicon dioxide is 3.5 μm.

[0062] Component content of the core layer: polyethylene terephthalate (PET) 90%, 1,4-cyclohexanedimethanol (CHDM) modified polyester copolymer (PETG) 10%.

[0063] Component content of the lower surface layer: polyethylene terephthalate (PET) 89.7%, 1,4-cyclohexanedimethanol (CHDM) modified polyester copolymer (PETG) 10%, SiO 2 (Silicon dioxide) anti-blocking agent 0.3%, wherein the central particle diameter of silicon dioxide is 3.5 μm.

[0064] The preparation method of polyester film is as follows:

[0065] Step (1): After mixing the raw materials of the core layer according to th...

Embodiment 2

[0072] In terms of mass fraction, the specific component contents of each layer of the present embodiment are as follows:

[0073] Upper surface component content: 1,4-cyclohexanedimethanol (CHDM) modified polyester copolymer (PETG) 94.7%, polyethylene terephthalate (PET) 5%, SiO 2 (Silicon dioxide) anti-blocking agent 0.3%, wherein the central particle diameter of silicon dioxide is 3.5 μm.

[0074] Component content of the core layer: polyethylene terephthalate (PET) 90%, 1,4-cyclohexanedimethanol (CHDM) modified polyester copolymer (PETG) 10%.

[0075] Component content of the lower surface layer: polyethylene terephthalate (PET) 89.7%, 1,4-cyclohexanedimethanol (CHDM) modified polyester copolymer (PETG) 10%, SiO 2 (Silicon dioxide) anti-blocking agent 0.3%, wherein the central particle diameter of silicon dioxide is 3.5 μm.

[0076] The preparation method of polyester film is as follows:

[0077] Step (1): After mixing the raw materials of the core layer according to th...

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Abstract

The invention relates to the technical field of polyester films, and provides a two-way stretching knurling thermal composite polyester film and a preparation method thereof. Through the design of the raw materials, the formula and the process, the upper surface layer of the polyester film has good thermal compounding property, the core layer has lower crystallinity and thermal deformation temperature, and the lower surface layer has lower crystallinity and thermal deformation temperature and good knurling property. The polyester film provided by the invention not only has good mechanical properties and optical properties of a polyester film, but also has the characteristics of thermal compounding and knurling, can be used as a knurling composite film of various plate products, is environment-friendly, can be used for replacing a PVC (Polyvinyl Chloride) knurling composite film, and has a wide market prospect.

Description

technical field [0001] The invention relates to the technical field of polyester films, in particular to a biaxially stretched embossable heat-composite polyester film and a preparation method thereof. Background technique [0002] Polyester refers to the abbreviation of thermoplastic polyester containing ester groups in the macromolecular structure. Among the existing thermoplastic polyesters, polyethylene terephthalate (PET) has good fiber-forming properties, film-forming properties, excellent mechanical properties, abrasion resistance, creep resistance, low water absorption and Electrically insulating and cheap, it is widely used in bottle containers, sheets, chemical fibers, films, engineering plastics, etc. [0003] Bidirectional polyester film (BOPET) is a film material made of polyethylene terephthalate as a raw material, which is made into a thick sheet by extrusion and then biaxially stretched. Bidirectional polyester film has high transparency, non-toxic and tast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B27/18B32B27/06C08L67/02C08J5/18B29C55/14B29C71/02B29D7/01B29L7/00
Inventor 孟繁寅黄春光黄天驰黄海妮陈征
Owner 杭州大东南高科新材料有限公司
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