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Preparation method of polyester film for coating tag

A polyester film and coating technology, applied in the field of polyester film, can solve the problems of low bonding force between ink and film surface, corona value attenuation, no water resistance and alcohol resistance, etc., to avoid corona attenuation, ink High adhesion and stable hue

Active Publication Date: 2015-03-25
TIANJIN WANHUA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corona treatment must be carried out on the polyester film before the surface printing process of the polyester film, but there is a problem of corona value attenuation in the printing process, and the bonding force between the ink and the film surface is not high, and it does not have water resistance and alcohol resistance, etc. Solvent properties

Method used

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  • Preparation method of polyester film for coating tag
  • Preparation method of polyester film for coating tag

Examples

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preparation example Construction

[0031] Such as figure 1 Shown, the preparation method of coated polyester film for label of the present invention comprises the following steps:

[0032] 1) Raw material ratio

[0033] The coated polyester film for labels is co-extruded in three layers: the core layer is made of white polyester chips with titanium dioxide additive mixed with PET polyester chips; the two surface layers are made of polyester chips with silica additives and PET polyester chips mix;

[0034] 2) Melt extrusion

[0035] The extrusion temperature is controlled at 276-278°C, the filter temperature is 280-282°C, and the extrusion speed is controlled at 45-47r / min;

[0036] 3) Die cast sheet

[0037] After the melt is extruded from the die, it is chilled by a cold roll with a surface temperature of 28-30°C, and the crystallinity is greatly increased to form a cast sheet, and static electricity above 8KV is applied through the electrostatic attachment system;

[0038] 4) Longitudinal stretching

[...

Embodiment 1

[0056] Example 1: Taking a 50 μm white label film as an example, the preparation method includes the following steps:

[0057] 1. Raw material supply

[0058] The coated polyester film for labels adopts three-layer co-extrusion: the core layer is made of white polyester chips (Sukarno TA40) containing titanium dioxide additives mixed with PET polyester chips (Yizheng Chemical Fiber FG600), and different mixing ratios are used for different thicknesses , taking the 50μm white label film as an example, the content of white polyester chips containing titanium dioxide additives is controlled between 17-19%; the surface layer is made of polyester chips containing silica additives (Yizheng Chemical Fiber FG610) and PET polyester chips Mixing, taking 50μm white label film as an example, the content of polyester chips containing silica additives is controlled between 70-85%.

[0059] The printing process of the label film often has dense information such as barcodes, and the fineness...

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Abstract

The invention discloses a preparation method of a polyester film for coating a tag. Functional coating is performed on the surface of the polyester film to increase the adhesive force of the surface of the film, and the problem of corona attenuation of a common corona film can be effectively prevented, so that convenience is brought for downstream manufacturers to carry out UV ink printing, conductive ink printing and barcode printing. Tag films are mainly white, customers demand much on the hue, high-temperature resistance, no deformation and high tensile strength are required during later processing, and meanwhile, the ink adhesive force has to be guaranteed for the customers. Therefore, the polyester film for coating the tag has the main technical characteristics of stable hue, high-temperature resistance and high strength and ink adhesive force.

Description

technical field [0001] The invention belongs to polyester films, in particular to a method for preparing coated polyester films for labels. Background technique [0002] Due to the poor heat and waterproof performance of paper labels, white polyester film is usually used for printing or printing barcodes at home and abroad. Corona treatment must be performed on the polyester film before the surface printing process of the polyester film, but there is a problem of corona value attenuation in the printing process, and the bonding force between the ink and the film surface is not high, and it does not have water resistance and alcohol resistance, etc. Solvent properties. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing a coated polyester film for labels that performs functional coating, increases the adhesion of the film surface, and can effectively avoid the corona attenuation problem of ordi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/01
Inventor 苏志钢田立斌徐京姬刘伯骏崔昱
Owner TIANJIN WANHUA CO LTD
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