Optical polyester film with multilayer structure and preparation method thereof

A technology of optical polyester film and multi-layer structure, which is applied in the field of polyester film, can solve the problems of affecting the thermal performance of optical film, not conducive to improving thermal performance, affecting the optical performance of film, etc., achieving excellent optical performance and processing performance, improving Apparent flatness, effect of improving surface inertia

Inactive Publication Date: 2009-12-09
CHINA LUCKY FILM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The film has the disadvantages of high haze value, poor optical performance and low flatness
[0005] The Chinese patent application number 03809869.5 discloses a laminated film for optics. The base film of the laminated film for optics contains micron particles, while the easy-slip layer on the surface contains polymer adhesives and spherical particles. Adding particles to solve the slippery problem of the optical film will affect the thermal performance of the optical film; if only micron particles are added to the base film and primer layer, the optical performance of the film will be affected, and it is also not conducive to improving the thermal performance , affecting the scope of its use

Method used

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  • Optical polyester film with multilayer structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Mix the polyethylene terephthalate polyester chips with intrinsic viscosity of 0.65dl / g and the masterbatch chips containing nano-silica additives evenly, so that the final nano-silica content is 300ppm, and mix well The chips were crystallized and dried at 170°C, and then the crystallized material was fed into a single-screw basic machine for melt extrusion at 280°C.

[0049] Mix polyethylene terephthalate polyester chips with an intrinsic viscosity of 0.60dl / g and polyester masterbatch chips containing nano-scale titanium dioxide and micron-scale cross-linked polystyrene composite additives evenly, nano-titanium dioxide and micron polystyrene The weight ratio of styrene is 4:1, so that the final additive content is 600ppm. The mixed material is crystallized and dried at 170°C, and then sent to a twin-screw extruder for melt extrusion at 282°C.

[0050] The above two molten materials are passed through a co-extrusion die, and the melt is cast onto a rotating cooling dr...

Embodiment 2

[0054] The polyethylene terephthalate polyester chip that intrinsic viscosity is 0.80dl / g is mixed with the polyester masterbatch chip of nanometer aluminum oxide additive, makes the content of final nanometer aluminum oxide be 800ppm, will The mixed material is crystallized and dried at 170°C, and then the crystallized material is fed into a single-screw basic machine for melt extrusion at 270°C.

[0055] Mix polyethylene terephthalate polyester chips with an intrinsic viscosity of 0.55dl / g and polyester masterbatch chips containing nano-scale silicon dioxide and micron-scale cross-linked polymethacrylate composite additives evenly. The weight ratio of silicon dioxide and micron polymethacrylate is 12:1, so that the content of the final additive is 1000ppm, the mixed material is crystallized and dried at 170°C, and then sent into a twin-screw extruder at 275°C under melt extrusion.

[0056] The above two molten materials are passed through a co-extrusion die, and the melt is...

Embodiment 3

[0060] Polyethylene terephthalate polyester chips with an intrinsic viscosity of 0.55dl / g are crystallized and dried at 170°C, and then the crystallized material is fed into a single-screw basic machine for melt extrusion at 290°C.

[0061] Mix polyethylene terephthalate polyester chips with an intrinsic viscosity of 0.80dl / g and polyester masterbatch chips of nano-calcium carbonate and micro-silica composite additives evenly, and the nano-calcium carbonate and micro-silica The weight ratio is 20:1, and the final additive content of the uniformly mixed polyester chips is 10 ppm. The mixed material is fed into a twin-screw extruder, and melted and extruded at 290°C.

[0062] The above two molten materials pass through a co-extrusion die, and the melt is cast onto a rotating cooling drum to form an amorphous A / B / A three-layer cast thick film.

[0063] The cast slab film was preheated to about 80° C., then longitudinally stretched at a longitudinal stretch ratio of 2.5:1, and the...

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Abstract

The invention relates to an optical polyester film with multilayer structure and preparation method thereof. The film comprises a basement membrane, at least one side of the basement membrane is coated with a ground coat, the basement membrane comprises a sandwich layer and at least one surface layer, wherein the sandwich layer contains nano additive, and the surface layer contains nano additive and micron additive; the ground coat is an organic polymer adhesive layer, the surface hardness of the ground coat is more than or equal to 1H. The film obtained by the invention has low haze value, excellent optical property, favourable surface adhesiveness, heat resisting property, surface smooth property, anti-sticking property and processability, and can be applicable to the display device fields of LCD, CRT, PDP, EL and the like.

Description

technical field [0001] The invention relates to a polyester film, in particular to an optical polyester film with a multilayer structure and a preparation method thereof. Background technique [0002] Optical polyester films have been widely used in recent years due to their excellent optical properties, good surface adhesion, good mechanical properties and heat resistance. Biaxially oriented optical polyester film is widely used in the deep processing of various optical polyester film materials due to its good dimensional stability, chemical resistance, high transparency and good processability compared to other plastic films. [0003] After the optical polyester film is biaxially stretched and pre-coated with the bottom layer, although it has excellent physical and chemical properties and processing properties, because the coating itself has the characteristics of easy adhesion, the excellent optical properties endow the film surface with very low roughness. Therefore, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/20B32B27/36B32B33/00B29C69/00B29C47/92B29C47/78B29C48/90B29C48/08B29C48/91B29C48/92
CPCB29C48/92B29C2948/92704B29C48/08B29C48/832B29C48/91B29C48/914B29C48/90B29C2948/92895
Inventor 王旭亮熊跃斌高青
Owner CHINA LUCKY FILM CORP
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