A kind of special near-infrared absorbing polyester film capable of batch production and its preparation method

A near-infrared absorbing agent and polyester film technology, applied in the field of polyester film, can solve the problems of poor heat resistance, easy peeling of the near-infrared absorbing film coating, etc., and achieves good heat resistance, good market application prospects, and light transmission. low rate effect

Active Publication Date: 2021-07-02
HANGZHOU HESHUN TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, the present invention provides a special near-infrared absorbing polyester film that can be produced in batches and a preparation method thereof. The second is to overcome the shortcomings of the above-mentioned near-infrared absorbing film coating that is easy to peel off, and the third is that it can be industrially mass-produced and the film thickness is controllable

Method used

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  • A kind of special near-infrared absorbing polyester film capable of batch production and its preparation method

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Effect test

Embodiment 1

[0100] Such as figure 1 As shown, a special near-infrared absorbing polyester film that can be mass-produced, the film is a BAB type three-layer structure film, A is a special near-infrared absorbing layer, and B is a surface modification layer. The raw materials of layer A are composed of 50%-99.9% optical grade high-transparency PET slices, 0%-50% optical grade high-transparency PCT slices and 0.1%-1% near-infrared absorber by weight percentage; the raw materials of B layer The composition is composed of 5%-35% of silicon-containing PET masterbatch and 65%-95% of optical-grade high-transparency PET slices by weight percentage.

[0101] Specifically, in this embodiment, the preparation method of a special near-infrared absorbing polyester film that can be mass-produced comprises the following steps:

[0102] (1) The polyester film is prepared by three-layer co-extrusion biaxial stretching equipment, and the A-layer raw material (using o-phenylenediamine nickel complex dye, t...

Embodiment 2

[0113] (1) The polyester film is prepared by three-layer co-extrusion biaxial stretching equipment, and the A-layer raw material (using indole iodine polymethine cyanine dye, adding a mass fraction of 0.4%, optical grade high-transparency PET slices) The added mass fraction is 89.6%, and the added mass fraction of optical-grade high-transparency PCT chips is 10%) is sent to the corresponding feed bin of the main extruder through the suction system, and the main extrusion volume is 1250kg / h, controlled by a metering pump The ratio of raw materials is fed into the main extruder, melted and extruded at 273°C, vacuumed at 2.5mbar, and filtered through a 15μm butterfly filter to remove moisture, oligomers and impurities in the raw material melt as the main extruder. extrusion melt;

[0114] (2) Send the B-layer raw materials (the mass fraction of silicon-containing masterbatch is 10%, and the mass fraction of optical-grade high-transparency PET slices is 90%) to the corresponding h...

Embodiment 3

[0123] (1) The polyester film is prepared by three-layer co-extrusion biaxial stretching equipment, and the A-layer raw material (using thiodiene cobalt complex dye, the added mass fraction is 0.1%, the added mass of optical grade high-transparency PET slices The fraction is 79.9%, and the added mass fraction of optical-grade high-transparency PCT slices is 20%) is sent to the corresponding feed bin of the main extruder through the suction system, and the main extrusion volume is set at 1200kg / h, controlled by a metering pump The ratio of raw materials is fed into the main extruder, melted and extruded at 275 ° C, vacuumed at 2.1 mbar, and filtered through a 15 μm butterfly filter to remove moisture, oligomers and impurities in the raw material melt as the main extrusion melt;

[0124] (2) Send the B-layer raw materials (the mass fraction of silicon-containing masterbatch is 15%, and the mass fraction of optical-grade high-transparency PET slices is 85%) to the corresponding h...

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Abstract

The invention provides a special near-infrared absorbing polyester film that can be mass-produced and a preparation method thereof. The film is a BAB type three-layer structure film, wherein layer A is a special near-infrared absorbing layer, layer B is a surface modification layer, and the total film The thickness is 30-100 μm; the raw materials of the A layer are 50%-99.9% optical-grade high-transmittance PET slices, 0%-50% optical-grade high-transmittance PCT slices and 0.1%-1% near-infrared Absorbent composition: The raw materials of the B layer are composed of 5%-35% silicon-containing PET masterbatch and 65%-95% optical-grade high-transparency PET slices by weight. The near-infrared absorbing polyester film prepared by the present application has the characteristics of good heat resistance and low light transmittance in the 700-900nm near-infrared band.

Description

technical field [0001] The invention belongs to the technical field of polyester films, and in particular relates to a special near-infrared absorbing polyester film capable of mass production and a preparation method thereof. Background technique [0002] Biaxially oriented polyester film has excellent physical and chemical properties and is widely used in national production and life. Polyester film materials mainly include PET, PBT, PCT and PEN, etc. Among them, PET has the characteristics of high strength, corrosion resistance, good electrical insulation, and relatively low price. It is the most commonly used material for the production of biaxially oriented polyester films, but Its heat resistance is not as good as PBT and PCT, and it is prone to heat shrinkage deformation and strength decline at high temperatures. [0003] Filter films with specific absorption bands are a research hotspot in optical films in recent years. This special film plays an important role in e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/36B32B27/06B29D7/01
CPCB29D7/01B32B27/08B32B27/36B32B2307/306
Inventor 范和强陈正坚吴锡清杨凯元方王凯
Owner HANGZHOU HESHUN TECH CO LTD
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