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Novel high-elongation flexible polyester base film and preparation method thereof

A polyester base film, flexible technology, applied in the direction of chemical instruments and methods, lamination, building components, etc., to achieve simple production, low production cost, high elongation and flexibility

Pending Publication Date: 2019-09-13
杭州大东南高科新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to make up for the deficiencies in extensibility and flexibility of the biaxially stretched polyester base film produced under the existing technical conditions, and further broaden the application range of the polyester base film, it is necessary to develop a flexible polyester base film with high extensibility. to meet the needs of markets that place high demands on extensibility and flexibility

Method used

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  • Novel high-elongation flexible polyester base film and preparation method thereof
  • Novel high-elongation flexible polyester base film and preparation method thereof
  • Novel high-elongation flexible polyester base film and preparation method thereof

Examples

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Embodiment 1

[0037] The structure of the polyester base film in this embodiment is an ABA three-layer structure, the thickness of the base film is 75 μ, the thickness of the upper and lower surface layers is 7.5 μ, and the thickness of the core layer B is 60 μ. The specific component content of the surface layer A or the core layer B is as follows:

[0038] 1,4-cyclohexanedimethylene terephthalate (PETG): 15.00wt.%

[0039] Polyethylene terephthalate (PET): 84.7wt.%

[0040] Silica anti-blocking agent with an average particle size of 4.0 μ (SiO 2 ): 0.30wt.%

[0041] The production method of polyester base film comprises the steps:

[0042] Step (1), the core layer raw material enters the extruder to be plasticized into a melt, and the melt is filtered through a filter, metered by a metering pump, filtered by a main filter, and then enters a three-channel die head.

[0043] Step (2), the raw materials of the upper and lower surface layers are mixed according to the formula ratio, and th...

Embodiment 2

[0049] In this embodiment, the structure of the polyester base film is ABA structure, the thickness of the base film is 90 μ, the thickness of the upper and lower surface layers is 9.0 μ, and the thickness of the core layer B is 72 μ. The specific component content of the surface layer A or the core layer B is as follows:

[0050] 1,4-cyclohexanedimethylene terephthalate (PETG): 18.00wt.%

[0051] Polyethylene terephthalate (PET): 81.7wt.%

[0052] Silica anti-blocking agent with an average particle size of 4.0 μ (SiO 2 ): 0.30wt.%

[0053] The production method of polyester base film comprises the steps:

[0054] Step (1), the core layer raw material enters the extruder to be plasticized into a melt, and the melt is filtered through a filter, metered by a metering pump, filtered by a main filter, and then enters a three-channel die head.

[0055]Step (2), after the raw materials of the upper and lower surface layers are mixed according to the formula ratio, they enter the ...

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Abstract

The invention relates to a high-elongation flexible polyester base film. The base film has a three-layer structure or a single-layer structure, and each layer of the three-layer structure or the single-layer structure comprises the following raw materials: 5-30 wt% of a polyester copolymer, 69.4-94.95 wt% of polyethylene glycol terephthalate, and 0.05-0.6 wt% of a silicon dioxide anti-blocking agent. The high-extension flexible polyester base film disclosed by the invention overcomes the shortages of extensibility and flexibility of a current biaxially-stretched polyester base film on a market, has higher tensile strength, a lower elasticity modulus, and very high elongation and flexibility balanced in longitudinal and horizontal directions.

Description

[0001] (1) Technical field [0002] The invention relates to a novel biaxially stretched polyester base film and a preparation method thereof. [0003] (2) Background technology [0004] In the prior art, polyester refers to the abbreviation of thermoplastic polyester containing ester groups in the macromolecular structure. Polyester resin can be processed into various bottle containers, sheets and base films. Among them, due to the excellent comprehensive performance of the biaxially oriented polyester base film (BOPET), it has a wide range of applications and a large output, and is widely used in various flexible packaging materials, composite materials, electrical insulation Display materials, photovoltaic backplane materials, die-cutting materials, release protection materials and other industrial product production fields. [0005] The polyester base film (BOPET) produced according to the existing biaxial stretching production process has extremely high tensile strength, ...

Claims

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Application Information

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IPC IPC(8): B32B27/36B32B27/08B32B27/18B32B37/08C08L67/02C08L67/00C08K3/36C08J5/18B29C48/08B29C48/18E04B1/66
CPCB29C48/08B29C48/18B32B27/08B32B27/18B32B27/36B32B37/08B32B2307/51B32B2367/00B32B2419/00C08J5/18C08J2367/02C08J2467/02C08K3/36E04B1/66
Inventor 孟繁寅黄飞刚黄伟光
Owner 杭州大东南高科新材料有限公司