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A kind of preparation method of 350μm polyester thick film

A polyester thick film and polyester technology, applied in the field of polyester processing, can solve the problems of high haze and low transparency of 350μm polyester thick film, and achieve the effects of avoiding electrostatic printing, increasing electrical conductivity, and reducing crystallization rate

Active Publication Date: 2019-06-28
YINGKOU KANGHUI PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of high haze and low transparency of the 350 μm polyester thick film prepared in the prior art, provide a preparation method of a 350 μm polyester thick film, and prepare a kind of polyester film with low haze, high transparency and glossiness. Better 350μm polyester thick film

Method used

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  • A kind of preparation method of 350μm polyester thick film

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Comparison scheme
Effect test

Embodiment 1

[0036] A kind of preparation method of 350 μm polyester thick film, comprises the following steps:

[0037] (1) Melt and extrude crystalline PET slices and amorphous PETG (polyethylene terephthalate-1,4-cyclohexanedimethanol ester) slices as polyester raw materials. The content of PETG slices is 5wt%, the melting point of amorphous PETG slices is 180 °C, the content of 1,4-cyclohexanedimethanol segment in amorphous PETG slices is 40wt%, and the crystallinity of crystalline PETG slices is 5%, crystalline PET chips contain magnesium acetate, and the volume resistance of crystalline PET chips is 10 14 Ω;

[0038] (2) The extruded material enters the die head, extrudes cast flakes, and the process parameters for extruding cast flakes are: the temperature of the conveying section of the extruder is 280°C, the temperature of the melting section is 280°C, the temperature of the filter is 280°C, and the temperature of the cold drum of the cast flakes 18°C, the lee temperature of the...

Embodiment 2

[0050] A kind of preparation method of 350 μm polyester thick film, comprises the following steps:

[0051] (1) Melt and extrude crystalline PET slices and amorphous PETG (polyethylene terephthalate-1,4-cyclohexanedimethanol ester) slices as polyester raw materials. The content of PETG slices is 15wt%, the melting point of amorphous PETG slices is 220°C, the content of 1,4-cyclohexanedimethanol segment in amorphous PETG slices is 30wt%, and the crystallinity of crystalline PETG slices is 50%, crystalline PET chips contain magnesium acetate, and the volume resistance of crystalline PET chips is 5×10 14 Ω;

[0052] (2) The extruded material enters the die head, extrudes cast flakes, and the process parameters for extruding cast flakes are: the temperature of the conveying section of the extruder is 280°C, the temperature of the melting section is 280°C, the temperature of the filter is 280°C, and the temperature of the cold drum of the cast flakes 20°C, the leeward temperature...

Embodiment 3

[0057] A kind of preparation method of 350 μm polyester thick film, comprises the following steps:

[0058] (1) Melt and extrude crystalline PET slices and amorphous PETG (polyethylene terephthalate-1,4-cyclohexanedimethanol ester) slices as polyester raw materials. The content of PETG slices is 10wt%, the melting point of amorphous PETG slices is 200°C, the content of 1,4-cyclohexanedimethanol segment in amorphous PETG slices is 35wt%, and the crystallinity of crystalline PETG slices is 27.5%, crystalline PET chips contain magnesium acetate, and the volume resistance of crystalline PET chips is 10 15 Ω;

[0059] (2) The extruded material enters the die head, extrudes cast flakes, and the process parameters for extruding cast flakes are: the temperature of the conveying section of the extruder is 280°C, the temperature of the melting section is 280°C, the temperature of the filter is 280°C, and the temperature of the cold drum of the cast flakes 19°C, the leeward temperature...

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Abstract

The invention relates to a preparation method of a 350-micrometer polyester thick film. According to the preparation method, a polyester raw material enters a die head extruding cast piece after being melted and extruded, and finally is stretched longitudinally and transversely to obtain the 350-micrometer polyester thick film. The polyester raw material is composed of a crystallization type PET slice and a non-crystallization type polymer slice. The melting point of the non-crystallization type polymer slice ranges from 180 DEG C to 220 DEG C, compatibility between the melted non-crystallization type polymer slice and PET melt is good, regularity of a PET molecular chain can be destroyed, the tensile strength of the 350-micrometer polyester thick film manufactured finally ranges from 175 MPa to 200 MPa, the tensile modulus of elasticity ranges from 2800 MPa to 3200 MPa, a haze value is 4-7%, the light transmittance is 86-88%, and the glossiness is 120-126 GU. The preparation method is simple in technology and easy to operate, industrialized production can be achieved easily, the production cost is reduced, moreover, the haze degree of the product is low, the transparency property is high, the glossiness is good, and economy and applicability coexist.

Description

technical field [0001] The invention belongs to the field of polyester processing, and relates to a preparation method of a polyester thick film, in particular to a preparation method of a 350 μm polyester thick film. Background technique [0002] Polyester film is a colorless, transparent and glossy film made of polyethylene terephthalate as raw material through extrusion, casting, biaxial stretching and other processes. Biaxial stretching is to stretch the film or sheet extruded from the extruder in the longitudinal and transverse directions at a certain temperature to orient the molecular chain or undetermined crystal plane, and then perform heat setting under the condition of stretching After two-way stretching, due to the orientation of molecular segments and the increase of crystallinity, the tensile strength, tensile modulus, impact strength and tear strength are significantly improved, and the cold resistance, transparency, air tightness, electrical Insulation and g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D7/01B29C48/92B29C48/08B29C41/52B29C55/12B29K67/00
CPCB29C41/52B29C48/92B29C55/12B29C2945/76531B29D7/01B29K2067/00
Inventor 何祥林鞠金虎
Owner YINGKOU KANGHUI PETROCHEM