Unlock instant, AI-driven research and patent intelligence for your innovation.

Polyester film in field of optical films

A technology of polyester film and polyester film layer, which is applied in the field of polyester film to achieve the effects of increasing light transmittance, improving adhesion, and good smoothness

Inactive Publication Date: 2012-08-01
WEIFANG FUWEI PLASTIC
View PDF7 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a kind of polyester film suitable for optical film with high light transmittance, low haze and excellent processing performance in view of the shortcomings of the prior art in the application of polyester film in the field of optical films. Polyester film for field

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polyester film in field of optical films

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. After pretreatment, the optical-grade bright polyester chips without nano- and micron-level additives are sent into the melt extrusion system and extruded through the die head. The temperature in the melt extrusion system is 280°C.

[0029] 2. The melt extruded through the die forms a transparent amorphous polyester cast sheet on the quenching roll.

[0030] 3. In the longitudinal stretching machine (MDO), the cooled cast sheet is stretched longitudinally by 3.3 times after preheating.

[0031] 4. Use 5 parts by weight of water-soluble acrylic resin and water-soluble polyester resin, 3 parts by weight of powder SiO 2 1. A coating solution of 92 parts by weight of high-purity water is applied on both surfaces of the longitudinally stretched film by roll coating, wherein the average particle diameter of silicon dioxide is 5-10 nm.

[0032] 5. In the transverse stretching machine (TDO), after preheating the longitudinally stretched and coated film, stretch it transvers...

Embodiment 2

[0035] 1. After pretreatment, the optical-grade bright polyester chips without nano- and micron-level additives are sent into the melt extrusion system and extruded through the die head. The temperature in the melt extrusion system is 280°C.

[0036] 2. The melt extruded through the die forms a transparent amorphous polyester cast sheet on the quenching roll.

[0037] 3. In the longitudinal stretching machine (MDO), the cooled cast sheet is stretched longitudinally by 3.3 times after preheating.

[0038] 4. Use a coating liquid containing 5 parts by weight of water-soluble polyurethane resin and water-soluble polyester resin, 5 parts by weight of colloidal silicon dioxide aqueous solution, 1 part by weight of silane coupling agent, and 89 parts by weight of high-purity water after longitudinal stretching The two surfaces of the thin film are coated by roller coating, wherein the average particle diameter of silicon dioxide is 5-10 nm.

[0039] 5. In the transverse stretching ...

Embodiment 3～11

[0042] Using a preparation method similar to Example 1, change the type and amount of resin (A), additive (B) and auxiliary agent (C), prepare coating solutions of different types and uses, and in Example 1 PET base film Coating treatment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
The average particle sizeaaaaaaaaaa
Thicknessaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a polyester film in the field of optical films. The polyester film comprises a polyester film layer, the polyester film layer does not contain any additives, and coating treatment of coating fluid containing resin and the additives is performed on one surface or two surfaces of the polyester film layer. The polyester film layer disclosed by the invention does not contain any additives, the light transmittance of the polyester film can not be affected due to the adding of SiO2 in the prior art, the polyester film with high light transmittance and low mist degree in the optical field is obtained, and after the coating treatment of the coating fluid containing the resin and the additives is performed on one surface or two surfaces of the polyester film layer, the problems that the polyester film which does not contain the SiO2 and other additives is prone to adhesion during the production process and difficult rolling and processing of the film are further caused can be solved.

Description

technical field [0001] The invention relates to a polyester film, in particular to a polyester film used in the field of optical grade films. Background technique [0002] Polyester film is widely used in many industries and fields because of its excellent characteristics such as high tensile strength, high elastic modulus, high impact strength, good heat and cold resistance, and good electrical insulation performance. Due to different application fields, polyester films have different performance requirements. In the conventional field, more attention is paid to the mechanical properties and stability of polyester films, while the requirements for optical properties are not high. For example, the light transmittance of polyester films is generally less than 89%, and the haze is much greater than 1.5%. [0003] In many application fields, polyester film is often used as the base film for optical films in large, medium and small LCDs and LED flat panel displays, such as brig...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B32B27/08B32B27/36B32B27/18
Inventor 孟令明滕岩孟凡李中国曾丽平
Owner WEIFANG FUWEI PLASTIC