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
7 Cites 15 Cited by

AI-Extracted 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...
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Method used

In the present embodiment, ammonium polyphosphate is organically modified modified ammonium polyphosphate, and ammonium polyphosphate adopts the method of grafting to increase alkane chain on its molecular structure, has improved its compatibility with high polymer matrix , which is beneficial to improve the flame retardancy and mechanical properties of intumes...
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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.

Technology Topic

Examples

  • Experimental program(23)

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] The halogen-free intumescent flame-retardant polypropylene film of this embodiment has a small amount of smoke when burned, and is low-toxic and environmentally friendly.
[0016] The oxygen index of the halogen-free intumescent flame-retardant polypropylene film of this embodiment is 21.7% to 30.6%, the vertical burning test of the 0.2mm film shows that the combustion grade reaches the UL-94 VTM-0 level, and the tensile strength is 13.12 to 18.43MPa. The cracking strength is 25.67-32.98kN/m, and the elongation at break is 200%-256.4%. It not only has excellent flame retardant properties but also maintains the excellent physical and mechanical properties of the material.

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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PUM

PropertyMeasurementUnit
Tensile strength13.12 ~ 18.43mPa
Tear strength25.67 ~ 32.98kN/m
Thickness0.2mm
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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