Preparation method of biaxially oriented polyester film for electronics tapes

A technology of biaxially oriented polyester and electronic tape, which is applied in chemical instruments and methods, applications, household appliances, etc. performance, difficulty in film production, etc., to achieve uniform performance such as insulation, improve cleanliness, and increase the molecular weight of raw materials

Inactive Publication Date: 2016-11-23
ANHUI GUOFENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As the electronics industry develops towards miniaturization and miniaturization, electrical films are also developing towards ultra-thinning. The thinner the film, the more difficult it is to produce, and the production of ultra-thin films will reduce its insulation and electrical properties, thus affecting It is used in electrical industries such as capacitors and electronic product packaging
Existing biaxially oriented polyester films cannot meet the requirements of high-end electronic tapes in terms of insulation and heat resistance, and the surface resistivity can only reach 10 13 Ω, the long-term heat resistance temperature is 120~125℃

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method for biaxially stretched polyester film for electronic adhesive tape, comprising the steps of:

[0027] (1) Raw material pre-treatment process: using chloroform as the extractant, the polyethylene terephthalate slices are subjected to oligomer extraction, and the oligomer extraction process lasts for 20 hours at 81°C, wherein the additive in the slices is Silicon dioxide, and the effective mass content of silicon dioxide is 3000ppm, and the particle size is 1μm; after the extraction, pre-crystallize and dry the slices, and dry the slices until the water content is less than 1000ppm; crystallize the slices after pre-crystallization and drying Drying, the crystallization drying temperature is 165°C, and the slices are dried until the water content is less than 50ppm;

[0028] (2) Melt extrusion process: the crystallized and dried slices are sent to the shielded single-screw extruder and the twin-screw extruder respectively for plasticization and meltin...

Embodiment 2

[0034] A preparation method for biaxially stretched polyester film for electronic adhesive tape, comprising the steps of:

[0035] (1) Raw material pre-treatment process: use xylene as the extractant to extract oligomers from polyethylene terephthalate slices. The oligomers extraction process lasts for 15 hours at 79°C, and the additive in the slices is carbonic acid Calcium, and the effective mass content of calcium carbonate is 5000ppm, and the particle size is 0.7μm; after the extraction, the slices are pre-crystallized and dried, and the slices are dried to a water content of less than 1000ppm; the pre-crystallized and dried slices are crystallized and dried. The crystallization drying temperature is 160°C, and the slices are dried until the water content is less than 50ppm;

[0036](2) Melt extrusion process: the crystallized and dried slices are sent to the shielded single-screw extruder and the twin-screw extruder respectively for plasticization and melting, and the mel...

Embodiment 3

[0042] A preparation method for biaxially stretched polyester film for electronic adhesive tape, comprising the steps of:

[0043] (1) Raw material pretreatment process: using xylene and chloroform successively as extraction agent, carry out oligomer extraction to polyethylene terephthalate slice, oligomer extraction process lasts 18 hours at 80 ℃, wherein The additive in the slices is kaolin particles, and the effective mass content of the kaolin particles is 7000ppm, and the particle size is 0.5μm; after the extraction, the slices are pre-crystallized and dried, and the slices are dried to a water content of less than 800ppm; the pre-crystallized dried The slices are crystallized and dried, and the crystallization drying temperature is 163°C, and the slices are dried until the water content is less than 25ppm;

[0044] (2) Melt extrusion process: the crystallized and dried slices are sent to the shielded single-screw extruder and the twin-screw extruder respectively for plas...

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Abstract

The invention belongs to the technical field of polymer films for electronics tapes and particularly relates to a preparation method of biaxially oriented polyester film for electronics tapes and biaxially oriented polyester film; the method includes the steps of pretreating materials, melt-extruding, stretching and drawing; an extruder used in the melt-extruding step has filtration precision of a head strainer being 5-10 Mum; the stretching step includes sequential steps of longitudinal stretching, transverse stretching and film shaping, wherein the film shaping step includes sequential steps of thermal shaping and quick cooling, a platinum catalyst and a discharge device are mounted in an area of film thermal shaping, and part of oligomers around the film are decomposed with decomposed products discharged; undecomposed oligomers of the film and oligomer dust are separated from the film by a suction device; the film prepared herein has very small thickness and further improved insulating property and heat resistance, and each part of the film is more uniform in performance.

Description

technical field [0001] The invention belongs to the technical field of polymer films for electronic tapes, and in particular relates to a preparation method of a biaxially stretched polyester film for electronic tapes and the film. Background technique [0002] Biaxially oriented polyester film (BOPET) has the characteristics of high strength, good rigidity, transparency, high gloss, and strong toughness, and its tensile strength and impact strength are 3-3 times that of biaxially oriented polypropylene film (BOPP) film. 5 times, and has excellent wear resistance, folding resistance, pinhole resistance, antistatic and tear resistance, etc. At present, BOPET has been widely used in electronic tape substrates. [0003] As the electronics industry develops towards miniaturization and miniaturization, electrical films are also developing towards ultra-thinning. The thinner the film, the more difficult it is to produce, and the production of ultra-thin films will reduce its insu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B27/08B32B27/18B32B33/00B32B37/06B32B37/08B32B38/00B32B38/16B29C47/06B29C47/08B29C47/68B29C47/90B29K67/00B29L7/00B29L9/00C08L67/02C08K7/18B29C48/90
CPCB29K2067/003B29L2007/002B29L2009/00B32B27/08B32B27/18B32B27/36B32B33/00B32B37/06B32B37/08B32B38/0012B32B38/162B32B2038/0028B32B2250/03B32B2250/244B32B2307/206B32B2307/554B32B2367/00B29C48/022B29C48/08B29C48/21B29C48/25B29C48/69B29C48/904C08K7/18C08K2201/003C08L2201/08C08L67/02
Inventor 彭超
Owner ANHUI GUOFENG PLASTIC
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