Halogen-free expanded flame-retardant polypropylene film

A polypropylene film, intumescent flame retardant technology, applied in the field of intumescent flame retardant polypropylene film, can solve the problems of unfriendly environment, low flame retardant efficiency, etc. Effect

Inactive Publication Date: 2010-09-15
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems that the existing intumescent flame-retardant polypropylene film is not friendly to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Specific embodiment 1: In this embodiment, the halogen-free intumescent flame-retardant polypropylene film consists of 68-77 parts by weight of polypropylene, 20-32 parts of halogen-free intumescent flame retardant, 0-0.08 parts of anti-dripping agent and processing aids 1 part; wherein the halogen-free intumescent flame retardant is composed of triazine-based char-forming agent-foaming agent, ammonium polyphosphate and ethylene-acrylate-maleic anhydride terpolymer intercalated organic montmorillonite masterbatch, of which The mass ratio of triazine carbon forming-foaming agent to ammonium polyphosphate is 1:2~5; The mass ratio of soil masterbatch is 1:0.5~1.5; ethylene-acrylate-maleic anhydride terpolymer and organic montmorillonite are intercalated in organic montmorillonite masterbatch The mass ratio of soil is 0.4-2.5:1; the processing aid is composed of antioxidant 1010, N,N-ethylene bisstearic acid amide and polypropylene wax in a weight ratio of 3:3:4.

[0015] ...

Example Embodiment

[0017] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the polypropylene is homopolypropylene or copolymerized polypropylene, and the molecular weight is 280,000-300,000. Other parameters are the same as in the first embodiment.

[0018] In this embodiment, the polypropylene is a polypropylene powder produced by Daqing Huake Company, and its MFR (melt flow rate) is 3.5 g / 10 min.

Example Embodiment

[0019] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that the anti-dripping agent is polytetrafluoroethylene powder. Other parameters are the same as those in Embodiment 1 or Embodiment 2.

[0020] The anti-dripping agent in this embodiment is a commercially available product.

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Abstract

The invention discloses a halogen-free expanded flame-retardant polypropylene film, relates to an expanded flame-retardant polypropylene film, and solves the problem that the conventional expanded flame-retardant polypropylene film is not environment-friendly and has low flame-retardant efficiency. The polypropylene film is prepared from the following components in part by weight: 68 to 77 parts of polypropylene, 20 to 32 parts of halogen-free expanded flame retardant, 1 part of processing aid and 0 to 0.08 part of anti-dripping agent, wherein the halogen-free expanded flame retardant consists of a triazine charring foaming agent, ammonium polyphosphate and ethylene-acrylate-maleic anhydride terpolymer intercalated organic montmorillonite master batch. The polypropylene film has the oxygen index between 21.7 and 30.6 percent, the combustion level of UL-94V-TM-0 level, the tensile strength between 13.12 and 18.43 MPa, the tearing strength between 25.67 and 32.98kN/m, and the elongation at break between 200 and 256.4 percent. The halogen-free expanded flame-retardant polypropylene film has excellent flame retardance, maintains excellent mechanical property of the film, and has the advantages of low smoke, low toxin, and environmental protection during combustion.

Description

technical field [0001] The invention relates to an intumescent flame-retardant polypropylene film. Background technique [0002] Polypropylene film is widely used. However, due to the poor flame retardancy of polypropylene itself, its oxygen index (LOI) is only 17, and the thickness of the film is very small, which makes the polypropylene film more flammable, thus limiting its application in the fields of transformers, printed circuit boards, and electronic and electrical packaging. . Because polypropylene is a non-polar material, it has poor compatibility with more polar flame retardants. The modification of polypropylene can improve its flame retardancy on the one hand, and on the other hand, it can introduce some polar groups, which is conducive to increasing the filling amount of polar flame retardants and preparing high-performance flame-retardant films. Currently commonly used modification methods: 1. Matrix resin blending modification: that is, to use polymers with...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08K9/04C08K3/34C08K3/32C08K5/3492C08L79/04
Inventor 李斌白鹏
Owner NORTHEAST FORESTRY UNIVERSITY
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