Tape-cast polyester film and preparation method thereof

A polyester film and casting technology, applied in the field of polyester film and its preparation, can solve the problems of inability to carry out deep processing, low elongation at break, high temperature of metal plate, and achieve strong subsequent processability and high elongation at break. , the effect of low temperature

Active Publication Date: 2013-09-18
ORG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a casting polyester film, which is prepared by using polyester with a specific intrinsic viscosity and inorganic pigments in a specific ratio through a casting process. The casting polyester film can be bonded to the surface of a metal plate at low temperature. High elongation at break, strong follow-up processability, and low production cost, which solves the problems of high temperature, high energy consumption, low elongation at break and inability to carry out further processing in the prior art of double-drawn polyester film laminated metal plate question

Method used

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  • Tape-cast polyester film and preparation method thereof
  • Tape-cast polyester film and preparation method thereof
  • Tape-cast polyester film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Raw material formula of cast polyester film:

[0026] Isophthalic acid modified polyethylene terephthalate (the molar content of isophthalic acid in the modified polyester is 4%), bottle-grade polyester chips, intrinsic viscosity 0.8dl / g, melting point 240°C.

[0027] Titanium dioxide masterbatch: the TiO contained in it 2 The mass fraction of is 50%, and the rest is the above-mentioned isophthalic acid-modified polyethylene terephthalate.

[0028] Process method: fully mix the above-mentioned bottle-grade polyester chips and titanium dioxide masterbatch at a weight ratio of 4:1; dry on a fluidized bed at a temperature of 130°C for 4 hours; dry the mixture Extruded through a twin-screw extruder, the temperature of each zone of the twin-screw extruder is between 245°C and 265°C (gradually increasing from the feeding port to the die), preferably extruded through a single-layer die to the casting roll Above, the diameter of the die opening is controlled to be 0.16mm, th...

Embodiment 2

[0038] Raw material formula of cast polyester film:

[0039] Isophthalic acid-modified polyethylene terephthalate (wherein the molar content of the modified monomer isophthalic acid in the modified polyester is 2.6%), which is a bottle-grade polyester chip with an intrinsic viscosity of 0.86dl / g, melting point is 246°C.

[0040]Titanium dioxide masterbatch: the TiO contained in it 2 The mass fraction of is 45%, and the rest is the above-mentioned isophthalic acid-modified polyethylene terephthalate.

[0041] Process method: The above-mentioned bottle-grade polyester chips and titanium dioxide masterbatch are fully mixed according to the weight ratio of 2:1, and dried on a fluidized bed with a drying temperature of 140 ° C and a drying time of 4 hours; the dried mixture Then it is extruded through a twin-screw extruder, and the temperature in each zone of the twin-screw extruder is between 250°C and 265°C (gradually increasing from the feeding port to the die), preferably ext...

Embodiment 3

[0045] Raw material formula of cast polyester film:

[0046] Isophthalic acid modified polyethylene terephthalate (the molar content of the modified monomer isophthalic acid in the modified polyester is 2.6%), bottle-grade polyester chips, intrinsic viscosity 0.86 dl / g, melting point 246°C.

[0047] Titanium dioxide masterbatch: the TiO contained in it 2 The mass fraction of is 50%, and the rest is the above-mentioned isophthalic acid-modified polyethylene terephthalate.

[0048] Process method: The above raw materials are fully mixed according to the weight ratio of: 40 parts of bottle-grade polyester chips and 60 parts of titanium dioxide masterbatch; drying on a fluidized bed at a drying temperature of 150 ° C for 4 hours; drying The final mixture is extruded through a twin-screw extruder, and the temperature of each zone of the twin-screw extruder is between 255°C and 270°C (gradually increasing from the feeding port to the die), preferably through a single-layer die. ,...

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Abstract

The invention provides a tape-cast polyester film and a preparation method thereof. The tape-cast polyester film comprises the following components on a weight basis: 65%-95% of polyethylene terephthalate or its modified polyester, and 5%-35% of inorganic pigments; the tape-cast polyester film is prepared by tape casting technology; the polyethylene terephthalate or its modified polyester has an intrinsic viscosity of not less than 0.78 dL / g. The invention also provides a preparation method of the tape-cast polyester film. The technical scheme of the invention provides a polyester film which has a high elongation at break, and can be attached to a metal plate surface at a low temperature, and solves the defects of excessive high temperature required for attaching a biaxial stretching polyester film to a metal plate, high energy consumption, and low elongation at break of a biaxial stretching polyester film, and incapability of deep processing in the prior art.

Description

technical field [0001] The invention relates to a polyester film and a preparation method thereof, in particular to a casting polyester film and a preparation method thereof. Background technique [0002] In the metal can industry, the can body material is generally tin-plated steel sheet, chrome-plated steel sheet or chrome-plated aluminum sheet. In order to protect the metal from corrosion, a layer of paint is usually applied to the outer surface of the metal material for the can. However, the coating process There will be organic solvents that pollute the environment volatilize, and the paint and coating equipment are expensive, and the coating process is complicated. [0003] Later, it was found that the modified double-stretched polyester film can be attached to the surface of the metal plate, which solved the problem of environmental pollution caused by organic solvents, but there are also some defects, such as: the double-stretched polyester film has a high melting po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K3/26C08K3/22C08K3/30C08K3/34B32B15/08B29C69/02B29L7/00
Inventor 赵宇晖叶强曾科
Owner ORG TECH CO LTD
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