Ultra-low surface roughness polyester base film/composite base film and preparation method thereof

A technology of surface roughness and polyester base film, applied in chemical instruments and methods, other household appliances, synthetic resin layered products, etc., can solve the problem of large roughness of polyester base film and reduce surface roughness of polyester film, etc. question

Active Publication Date: 2018-04-17
江苏东材新材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention uses polyester and self-made surface modification materials as raw materials, and the surface modification materials are composed of nano-inorganic materials and polyester. The nano-inorganic materials not only have an opening effect, but also can reduce the surface roughness of the polyester film; With advanced equipment and technology, a kind of ultra-low surface roughness polyester base film with good performance is prepared; thus effectively solving the technical problem of excessive roughness of the existing polyester base film

Method used

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  • Ultra-low surface roughness polyester base film/composite base film and preparation method thereof
  • Ultra-low surface roughness polyester base film/composite base film and preparation method thereof
  • Ultra-low surface roughness polyester base film/composite base film and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0055] Preparation of the first part of the surface modification

[0056] 1. Nano slurry preparation:

[0057] At room temperature, put 100kg of 50nm to 500nm nano-inorganic materials and 400kg of ethylene glycol into a mixer with ultra-high-speed stirring, and stir evenly to make a nano-slurry for later use. See Table 1 below for the amount of nano-inorganic materials used in the example numbers "Pulp 01-Pulp 12" of the nano-slurries.

[0058] Table 1: Nano-inorganic materials and dosage in nano-slurry (unit: ㎏)

[0059]

[0060] 2. Preparation of surface modification materials:

[0061] Add 1661kg of phthalic acid, 620~640kg of ethylene glycol, 2~3kg of catalyst, 1~1.5kg of stabilizer into the reactor, fill it with nitrogen, and react after esterification reaction at 230~260℃ for 2~3 hours At the end, keep the reactor at a vacuum of 0.08-0.09MPa while keeping the temperature at 270-290°C for polycondensation reaction. When the resin viscosity is 0.30-0.40dL / g, add 19.3...

Embodiment 4

[0084] An ultra-low surface roughness polyester base film, the ultra-low surface roughness polyester base film is made of a mixture of 40% polyester and 60% surface modifier by mass percentage, extruded and cast after melting and kneading A single-layer film with a thickness of 20 μm and a surface roughness Ra of 15 nm is produced by stretching the sheet, vertical and horizontal biaxial stretching, and heat setting.

[0085] The polyester has an intrinsic viscosity of 0.62-0.68dL / g, a melting point of 255-265°C, and a molecular weight of 20,000-30,000;

[0086] The surface modifier is composed of 0.2% nano-inorganic material and 99.8% copolyester with a molecular weight in the range of 20,000 to 30,000. The copolyester is obtained by polycondensation of phthalic acid and ethylene glycol. The viscosity of the surface modifier is within the range of 0.60 to 0.75dL / g;

[0087] The nano-inorganic material is one or both of nano-silicon dioxide, nano-barium sulfate, nano-alumina, ...

Embodiment 5

[0089] An ultra-low surface roughness polyester base film, the ultra-low surface roughness polyester base film is made of a mixture of 80% polyester and 20% surface modifying material, which is melted and kneaded, extruded and cast A single-layer film with a thickness of 250 μm and a surface roughness Ra of 35 nm is produced by stretching the sheet, vertical and horizontal biaxial stretching, and heat setting.

[0090] The polyester has an intrinsic viscosity of 0.62-0.68dL / g, a melting point of 255-265°C, and a molecular weight of 20,000-30,000;

[0091] The surface modifier is composed of 1% nano-inorganic material and 99% copolyester with a molecular weight in the range of 20,000 to 30,000. The copolyester is obtained by polycondensation of phthalic acid and ethylene glycol. The viscosity of the surface modifier is within the range of 0.60 to 0.75dL / g;

[0092] The nano-inorganic material is one or both of nano-silicon dioxide, nano-barium sulfate, nano-alumina, nano-magne...

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Abstract

The invention discloses an ultra-low surface roughness polyester base film / composite base film and a preparation method thereof. The ultra-low surface roughness polyester base film / composite base filmis characterized in that an ultra-low surface roughness polyester base film (a film A layer) is a single-layer film with the thickness of 20-250 microns and the surface roughness Ra of 15-35nm, prepared by performing melt mixing on a mixture of 40-80 mass percent of polyester and 20-60 mass percent of a surface modifier, extruding, casting, performing longitudinal and transverse biaxial stretching and performing heat setting; a composite base film (three-layer film A / B / A) is prepared by co-extrusion compounding of a film A, a film B and a film A and has the thickness of 20-250 microns and surface roughness of 15-35nm; and the film B is prepared by performing melt extrusion on polyester, casting, performing longitudinal and transverse biaxial stretching and performing heat setting. The ultra-low surface roughness polyester base film / composite base film disclosed by the invention is applicable to production-manufacturing of optical separation films, chip-type multilayer ceramic capacitor release films and high-end protective films of various display devices.

Description

technical field [0001] The invention belongs to the field of polyethylene terephthalate (hereinafter referred to as polyester or PET) film and its preparation, and relates to an ultra-low surface roughness polyester base film / composite base film and a preparation method thereof. The ultra-low surface roughness polyester (composite) base film of the present invention has a roughness Ra of 15-45nm, has good processing performance and smoothness, and is especially suitable for OCA (optical adhesive) release film, MLCC (chip multilayer ceramics) Capacitor) release film and various display devices and other high-grade protective film, release film. Background technique [0002] Polyester film is usually a film material made of polyester as the main raw material, which is made into a thick sheet by extrusion, and then stretched vertically and horizontally. The factors affecting the roughness of the polyester film are mainly PET slices with a single raw material, as well as the op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L67/02C08K3/36C08K3/22C08K3/34C08K3/26C08K3/30C08J5/18B32B27/06B32B27/18B32B27/36
CPCB32B27/08B32B27/18B32B27/36B32B2250/244B32B2250/40B32B2307/538B32B2457/16B32B2457/20C08J5/18C08J2367/00C08J2467/02C08K3/36C08K2003/222C08K2003/2227C08K2003/2241C08K2003/265C08K2003/3045C08K2201/011
Inventor 李明勇梁雪芬
Owner 江苏东材新材料有限责任公司
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