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Semi-transparent polyester film

A polyester film, semi-transparent technology, applied in the field of polyester film, can solve the problems of easy aging, poor light diffusion effect, uneven light transmittance, etc., to achieve uniform and soft transmitted light, excellent light diffusion effect, light good diffusion effect

Active Publication Date: 2015-07-29
安徽思瑞盟新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is backward, and there are many problems, such as product color, uneven light transmittance, not aging resistance (acrylic resin is easy to age after sunlight, yellowing and discoloration is not wear-resistant); acrylic resin coating is easy to fall off, especially when it is scratched or damaged. It is more obvious when it collides, which often causes light transmission in the damaged part; the image or advertisement content must be reverse sprayed (painted on the back of the film), which is easy to age, easy to leak light, and easy to scratch
The use of conventional white semi-transparent polyester film as the base material can reduce the coating amount and frequency of white pigments, but due to the poor light diffusion effect of conventional white semi-transparent polyester film while ensuring the light transmittance index, it is still necessary Coating it not only increases the process and cost, but also causes adverse effects on the environment due to the use of organic solvents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A semi-transparent polyester film, which is composed of a surface layer of polyethylene terephthalate substrate and a middle layer of polyethylene terephthalate substrate, wherein the surface layer of polyethylene terephthalate substrate is composed of Composed of 25% film grade polyester chip (Yizheng Chemical Fiber FG610) plus 75% fiber grade polyester chip (the content of light diffusing agent in the polyester chip is 3%) (Yizheng Chemical Fiber SB500), the middle layer polyethylene terephthalate The glycol ester matrix is ​​composed of 3% PP, 1.5% polyester chips (the mass ratio of titanium dioxide in the polyester chips is 60%) (Shanghai Lianle MB06) and 95.5% fiber-grade polyester chips (Yizheng Chemical Fiber SB500). The surface polyethylene terephthalate matrix and the middle layer polyethylene terephthalate matrix were biaxially stretched and heat-set to obtain a low-density white translucent polyester film, and its properties are shown in Table 1.

Embodiment 2

[0034] A semi-transparent polyester film, which is composed of a surface layer of polyethylene terephthalate substrate and a middle layer of polyethylene terephthalate substrate, wherein the surface layer of polyethylene terephthalate substrate is composed of 2% silicone resin (Changxing DF50A0) and 98% fiber-grade polyester chips (Yizheng Chemical Fiber SB500), the middle layer of polyethylene terephthalate matrix is ​​made of 3% PP, 4% polyester chips (the polyester The content of barium sulfate in the slice is 65% by weight) (Shanghai Lianle MB41) and 93% fiber-grade polyester slice (Yizheng Chemical Fiber SB500), the surface polyethylene terephthalate matrix and the middle layer polyethylene terephthalate After the ethylene glycol formate matrix is ​​biaxially stretched and heat-set, a low-density white translucent polyester film is obtained, and its properties are shown in Table 1.

Embodiment 3

[0036] A semi-transparent polyester film, which is composed of a surface layer of polyethylene terephthalate substrate and a middle layer of polyethylene terephthalate substrate, wherein the surface layer of polyethylene terephthalate substrate is composed of 2% silicone resin (Changxing DF50A0) and 98% fiber-grade polyester chips (Yizheng Chemical Fiber SB500), the middle layer polyethylene terephthalate matrix is ​​made of 3% PP, 1% silicone resin (Changxing DF50A0) Composed of 96% fiber-grade polyester chips (Yizheng Chemical Fiber SB500), the surface polyethylene terephthalate matrix and the middle layer polyethylene terephthalate matrix are biaxially stretched and heat-set to obtain low density White translucent polyester film, its properties are shown in Table 1.

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Abstract

The invention discloses a semi-transparent polyester film. The semi-transparent polyester film is formed by that a surface-layer polyethylene terephthalate matrix and an intermediate-layer polyethylene terephthalate matrix are drawn in two directions and thermally molded, the surface-layer polyethylene terephthalate matrix comprises an upper surface layer and a lower surface layer, the upper surface or / and the lower surface of the surface-layer polyethylene terephthalate matrix comprise 0.1-3 percent by mass of an optical diffusing agent, and the intermediate-layer polyethylene terephthalate matrix comprises 0.5-8 percent by mass of inorganic particles or organic silicon particles and 0.3-15 percent by mass of thermoplastic incompatible resin. The white semi-transparent polyester film of which the light transmittance is between that of a transparent polyester film and that of a white polyester film has an excellent light diffusing effect, and can meet light transmittance and light diffusivity required by an advertisement light box at the same time.

Description

technical field [0001] The invention relates to a polyester film, in particular to a low-density white translucent polyester film. Background technique [0002] White polyester film is widely used in packaging and advertising. The polyester film used in advertising light boxes, especially subway advertising light boxes must be a white semi-transparent polyester film, which not only has the effect of shielding the protective layer, but also can print exquisite advertising content on the polyester film. [0003] At present, the polyester film used in subway advertising light boxes is to coat a multi-layer white pigment on a transparent polyester film or a conventional white semi-transparent polyester film to achieve a semi-transparent effect. Usually, TiO2 is mixed into acrylic resin, and some additives are added at the same time, and then TiO2 and additive particles are coated on transparent polyester film or conventional white translucent polyester film by coating, drying, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F13/08B32B27/08B32B27/18B32B27/36B32B27/20
Inventor 刘勇黄云崚臧晓鹏
Owner 安徽思瑞盟新材料有限公司