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Flame-retardant insulating polyester film and production process thereof

A technology of polyester film and production process, applied in the field of polymers, can solve the problems of polyester film with poor heat resistance and easy to be charged with static electricity, so as to prevent oxygen and heat from entering the film, good flame retardant effect, and improve The effect of charge buildup

Inactive Publication Date: 2018-01-09
JIESHOU CITY TIANHONG PACKAGING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the polyester film is biaxially stretched and oriented, and after high-temperature heat setting treatment, it reaches a certain degree of crystallization, which makes the molecular structure of the polyester film very dense, and the heat resistance of the polyester film after molecular orientation is not very good. Well, prone to static electricity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A production process of flame-retardant insulating polyester film, comprising the steps of:

[0029] (1) 0.5g nano-TiO 2 Granules, 80g of polyester chips, 1g of barium-zinc heat stabilizer and 3.5g of composite flame retardant are placed in a vacuum oven, and dried at a temperature of 58°C to remove moisture;

[0030] (2) Feed the dried raw material into the extrusion system and melt it at 225°C. After the melted material passes through the co-extrusion die, it forms a thick sheet of polyester film on the cooling roller;

[0031] (3) Preheating the polyester film slab, the preheating temperature is 80°C, and the longitudinal stretch is 2.7 times;

[0032] (4) After preheating the film after longitudinal stretching, the preheating temperature is 90°C, and the transverse stretching is 3.0 times;

[0033] (5) Heat-setting the stretched polyester film at 30° C., cooling, and winding to obtain a flame-retardant insulating polyester film.

[0034] The polyester chips are p...

Embodiment 2

[0038] A production process of flame-retardant insulating polyester film, comprising the steps of:

[0039] (1) 1g nano-TiO 2 Granules, 83g of polyester chips, 1.5g of barium-zinc heat stabilizer and 4.5g of composite flame retardant are placed in a vacuum oven and dried at 60°C to remove moisture;

[0040] (2) Send the dried raw material into the extrusion system, melt it at 235°C, and form a thick sheet of polyester film on the cooling roller after the melted material passes through the co-extrusion die;

[0041] (3) Preheating the polyester film slab, the preheating temperature is 85°C, and the longitudinal stretch is 3.0 times;

[0042] (4) After preheating the film after longitudinal stretching, the preheating temperature is 95°C, and the transverse stretching is 3.3 times;

[0043] (5) Heat-setting the stretched polyester film at 45° C., cooling, and winding to obtain a flame-retardant insulating polyester film.

[0044] The polyester chips are polyethylene terephthal...

Embodiment 3

[0048] A production process of flame-retardant insulating polyester film, comprising the steps of:

[0049] (1) 1.5g nano-TiO 2 Granules, 87g of polyester chips, 2.4g of barium-zinc heat stabilizer and 5.5g of composite flame retardant are placed in a vacuum oven, and dried at a temperature of 61°C to remove moisture;

[0050] (2) Feed the dried raw material into the extrusion system and melt it at 250°C. After the melted material passes through the co-extrusion die, it forms a thick sheet of polyester film on the cooling roller;

[0051] (3) Preheating the polyester film slab, the preheating temperature is 95°C, and the longitudinal stretch is 3.4 times;

[0052] (4) After preheating the film after longitudinal stretching, the preheating temperature is 100°C, and the transverse stretching is 3.7 times;

[0053] (5) Heat-setting the stretched polyester film at 65° C., cooling, and winding to obtain a flame-retardant insulating polyester film.

[0054] The polyester chips ar...

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Abstract

The invention discloses a flame-retardant insulating polyester film and a production process thereof. The polyester film is prepared from following raw materials in parts by weight: 80-90 parts of polyester chips, 3.5-6.5 parts of a composite fire retardant, 0.5-2 parts of nano-TiO2 particles and 1-3 parts of a barium-zinc heat stabilizer, and the flame-retardant insulating polyester film is prepared by steps of raw material drying, melt-extruding, piece casting, biaxial stretching, heat setting, cooling and rolling up. In the production process, a composite flame retardant of ZnSnO3 is coatedwith Al(OH)3, so that a dense carbon layer can be effectively produced in a promoting manner during combustion of the materials, not only can prevent oxygen and heat from entering the interior of thefilm, but also prevent flammable gas from escaping to the outside of the film, and can achieve a good flame retardant effect; according to the production process, nano-TiO2 particles are added to theraw materials in the preparation process, and a plurality of interfaces can be generated between the nano-TiO2 particles and polyester and indirectly affect the carrier migration, and the addition ofthe nano-TiO2 particles can affect the concentration of carriers in a composite material medium, so that the charge accumulation in the material can be effectively improved and an insulation effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of polymers, and relates to a polyester film, in particular to a flame-retardant insulating polyester film and a production process thereof. Background technique [0002] Polyester (PET) film is a kind of packaging film with comprehensive performance. It has good transparency and luster; it has good air tightness and fragrance retention; it has moderate moisture resistance, and its moisture permeability decreases at low temperatures. PET film has excellent mechanical properties, its strength and toughness are the best among all thermoplastics, and its tensile strength and impact strength are much higher than ordinary films; it has good stiffness and stable size, and is suitable for secondary processing such as printing and paper bags. . PET film also has excellent heat resistance, cold resistance and good chemical resistance and oil resistance. [0003] The polyester film after biaxial stretching orientat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08K3/22C08K9/10C08K3/24C08J5/18
Inventor 吴磊胡伟张德顺李汪洋王若愚徐凤锦刘志强孙晓华
Owner JIESHOU CITY TIANHONG PACKAGING MATERIAL
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