Heat-resistant high-strength halogen-free flame-retardant polyester film and preparation method thereof

A flame-retardant polyester, high-strength technology, applied in the field of polyester film, can solve the problems of pollution, large equipment investment, decomposition, etc., and achieve the effect of strong operability and simple process flow

Pending Publication Date: 2021-02-09
浙江南洋科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, in order to achieve the flame retardancy of polyester, it is generally realized by the flame retardant coating method or the method of adding flame retardant masterbatch; the first coating method is easy to seep out of the flame retardant or decompose due to heat treatment, etc. , so that the flame retardant performance of the product is unstable, and this preparation method also has technological problems such as pollution; the second method of adding flame retardant masterbatch is currently the main research is to mix bromine, phosphorus, and phosphorus in the polyester film. Nitrogen series, inorganic series and other small molecule flame retardants are used to achieve the effect, and this type of additive flame retardant has a large amount of addition, poor compatibility with polyester substrates, and good dispersion must be achieved to exert the flame retardant effect. The mechanical properties of the obtained polyester film are poor, and the flame retardant will precipitate out after long-term use. In addition, it is usually difficult to obtain transparent flame retardant
[0004] There are also some technologies that add copolymerization-type flame retardant CEPPA (2-carboxyethylphenylphosphinic acid) to make copolymerization-type CEPPA flame-retardant polyester chips, but this type of flame-retardant chips increases with the increase of phosphorus content. , the regularity of polyester molecules is destroyed, and the melting point of polyester is greatly reduced, so that the mechanical properties and heat resistance are gradually reduced. At the same time, the investment in equipment is large, and a special synthesis reactor is required to achieve

Method used

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  • Heat-resistant high-strength halogen-free flame-retardant polyester film and preparation method thereof
  • Heat-resistant high-strength halogen-free flame-retardant polyester film and preparation method thereof
  • Heat-resistant high-strength halogen-free flame-retardant polyester film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The final content of phosphorus-containing polymer flame retardant is 15%, and the final content of polyester chips (PET) is 85%.

[0044] Dry the upper polyester chip (PET) and phosphorus-containing polymer flame retardant in dew point drying equipment. The drying temperature of polyester chip (PET) is 160 ° C, and the drying time is 3 to 5 hours. The drying temperature of the flame retardant is 85°C, and the drying time is 6-8 hours. At the end of the final drying, the measured raw material moisture should be less than 200ppm, and then transported into the twin-screw reaction extruder with vacuum. The temperature of the extruder Set it at 200-285°C, control the reaction extrusion time through the extrusion volume and extrusion speed, and finally cool and cut into pellets to obtain flame-retardant masterbatches.

[0045] Then add the flame retardant masterbatch and polyester chips (PET) into the extruder respectively, the two polyesters undergo a secondary transesterif...

Embodiment 2

[0048] Among them, the final content of phosphorus-containing polymer flame retardant is 18%, and the final content of polyester chips (PET) is 82%.

[0049] Dry the upper polyester chip (PET) and phosphorus-containing polymer flame retardant in dew point drying equipment. The drying temperature of polyester chip (PET) is 160 ° C, and the drying time is 3 to 5 hours. The drying temperature of the flame retardant is 85°C, and the drying time is 6-8 hours. At the end of the final drying, the measured raw material moisture should be less than 200ppm, and then transported into the twin-screw reaction extruder with vacuum. The temperature of the extruder Set it at 200-285°C, control the reaction extrusion time through the extrusion volume and extrusion speed, and finally cool and cut into pellets to obtain flame-retardant masterbatches.

[0050]Then add the flame retardant masterbatch and polyester chips (PET) into the extruder respectively, the two polyesters undergo a secondary t...

Embodiment 3

[0053] The final content of phosphorus-containing polymer flame retardant is 20%, and the final content of polyester chips (PET) is 80%.

[0054] Dry the upper polyester chip (PET) and phosphorus-containing polymer flame retardant in dew point drying equipment. The drying temperature of polyester chip (PET) is 160 ° C, and the drying time is 3 to 5 hours. The drying temperature of the flame retardant is 85°C, and the drying time is 6-8 hours. At the end of the final drying, the measured raw material moisture should be less than 200ppm, and then transported into the twin-screw reaction extruder with vacuum. The temperature of the extruder Set it at 200-285°C, control the reaction extrusion time through the extrusion volume and extrusion speed, and finally cool and cut into pellets to obtain flame-retardant masterbatches.

[0055] Then add the flame retardant masterbatch and polyester chips (PET) into the extruder respectively, the two polyesters undergo a secondary transesterif...

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Abstract

The invention discloses a heat-resistant high-strength halogen-free flame-retardant polyester film and a preparation method thereof, and particularly relates to a special flame-retardant polyester master batch prepared by reactive extrusion of a phosphorus-containing macromolecular flame retardant polymer and polyester, and a polyester film with the flame-retardant grade reaching UL94VTM-0 prepared from the raw materials according to different addition proportions. The obtained flame-retardant polyester film has the characteristics of high strength, good heat resistance and no influence on optical properties such as the original product color. The halogen-free flame-retardant polyester film is good in film-forming property and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of polyester films, in particular to a heat-resistant, high-strength, halogen-free flame-retardant polyester film and a preparation method thereof. Background technique [0002] Polyester film is a flammable material. For many applications of polyester film, the film is required to be made to have a flame-retardant effect, and it is often required not to affect the original properties, such as optical properties and mechanical properties. [0003] In the prior art, in order to achieve the flame retardancy of polyester, it is generally realized by the flame retardant coating method or the method of adding flame retardant masterbatch; the first coating method is easy to seep out of the flame retardant or decompose due to heat treatment, etc. , so that the flame retardant performance of the product is unstable, and this preparation method also has technological problems such as pollution; the second method of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L85/02C08J5/18
CPCC08J5/18C08J2367/02C08J2485/02
Inventor 张彪王畅罗定彬蒋鑫
Owner 浙江南洋科技有限公司
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