Specific near-infrared-absorption polyester thin membrane capable of achieving mass production and preparation method of polyester thin membrane

A near-infrared absorbing agent and polyester film technology, applied in the field of polyester film, can solve the problems of easy peeling off and poor heat resistance of the near-infrared absorbing film coating

Active Publication Date: 2019-09-06
HANGZHOU HESHUN TECH CO LTD
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  • Summary
  • 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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  • Specific near-infrared-absorption polyester thin membrane capable of achieving mass production and preparation method of polyester thin membrane

Examples

Experimental program
Comparison scheme
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 specific near-infrared-absorption polyester thin membrane capable of achieving mass production and a preparation method of the polyester thin membrane. The thin membrane is aBAB-type three-layer-structure thin membrane, wherein an A layer is a specific near-infrared-absorption layer, a B layer is a surface modification layer, and the total thickness of the thin membrane is 30-100 microns; the A layer is prepared from, by weight, 50%-99.9% of optical-grade high-transmittance PET chips, 0%-50% of optical-grade high-transmittance PCT chips and 0.1%-1% a near-infrared adsorbent; a B layer is prepared from, by weight, 5%-35% of PET master batches containing silicone and 65%-95% of optical-grade high-transmittance PET chips. The prepared near-infrared-absorption polyester thin membrane has the advantages of being good in heat resistance and low in transmittance of light within the near-infrared band of 700-900 nanometers.

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 Applications(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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