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Nano kaoline fire-resistant synergistic halogen-free non-phosphor cable sheath material

A nano-kaolin, cable sheathing material technology, applied in the field of halogen-free, low-smoke, non-phosphorus polyolefin flame retardant cable sheathing material, can solve the problem of unsatisfactory flame retardant performance and mechanical properties, complex manufacturing process, low purity, etc. problems, to achieve the effect of increased tensile strength, convenient material acquisition, high purity and whiteness

Inactive Publication Date: 2008-12-24
NINGBO SHIP PLASTIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the unsatisfactory flame retardancy and mechanical properties of the composite material manufactured by using nano-montmorillonite as a flame-retardant synergistic filler in the prior art, complex manufacturing process and high cost, and montmorillonite sheet layer With the defects and shortcomings of high negative charge, whiteness and low purity, it is difficult to promote and apply on a large scale in the field of industrialization, and to invent a high-strength, Low-cost low-smoke, halogen-free, non-phosphorus polyolefin flame-retardant cable sheathing material manufacturing technology, which has the advantages of simple manufacturing process, convenient material acquisition, high processing efficiency, high whiteness of finished products and good flame-retardant performance, and can meet It is required for large-scale promotion and application of industrialization, so as to provide a large number of cost-effective flame-retardant composite materials to the society

Method used

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  • Nano kaoline fire-resistant synergistic halogen-free non-phosphor cable sheath material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: 50 parts of ethylene-vinyl acetate copolymer, 30 parts of ethylene-octene copolymer, 20 parts of maleic anhydride grafted polyethylene, 80 parts of silane-treated aluminum hydroxide, and 30 parts of polymer-coated magnesium hydroxide 5 parts, 5 parts of zinc borate, 25 parts of nano-kaolin, 4 parts of polymer silicone, 1 part of zinc stearate, and 2 parts of antioxidant were added to a high-speed mixer and mixed for 10 minutes. Then the obtained mixture is melted and granulated in a twin-screw extruder at 120-150 DEG C, and dried to obtain the flame-retardant cable sheath material of the present invention. Test results: the oxygen index is 36.4, the tensile strength is 12.6Mpa, the elongation at break is 216%, and the vertical combustion reaches the FV-0 level.

Embodiment 2

[0041] Example 2: 60 parts of ethylene-vinyl acetate copolymers, 20 parts of ethylene-butene copolymers, 20 parts of maleic anhydride grafted ethylene-vinyl acetate copolymers, 90 parts of silane-treated aluminum hydroxide, polymer package 30 parts of coated aluminum hydroxide, 5 parts of zinc borate, 15 parts of nano-kaolin, 4 parts of polymer silicone, 1 part of polymer wax, 1 part of zinc stearate, and 2 parts of antioxidant were added to the high-speed mixer and mixed for 10 minutes . Then the obtained mixture is melted and granulated in a twin-screw extruder at 120-150 DEG C, and dried to obtain the flame-retardant cable sheath material of the present invention. Test results: the oxygen index is 35.8, the tensile strength is 12.2Mpa, the elongation at break is 202%, and the vertical combustion reaches the FV-0 grade.

Embodiment 3

[0042] Embodiment 3: With 50 parts of ethylene-vinyl acetate copolymers, 20 parts of low-density polyethylenes, 20 parts of maleic anhydride grafted polyethylenes, 10 parts of maleic anhydride grafted ethylene-vinyl acetate copolymers, silane treatment hydrogen 70 parts of alumina, 60 parts of polymer-coated aluminum hydroxide, 5 parts of zinc borate, 10 parts of nano-kaolin, 3 parts of polymer silicone, 1 part of zinc stearate, and 2 parts of antioxidant are added to a high-speed mixer and mixed 10 minutes. Then the obtained mixture is melted and granulated in a twin-screw extruder at 120-150 DEG C, and dried to obtain the flame-retardant cable sheath material of the present invention. Test results: the oxygen index is 35.4, the tensile strength is 12.6Mpa, the elongation at break is 174%, and the vertical combustion reaches the FV-0 grade.

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Abstract

The invention discloses a compound material manufacture technology that uses modified nanometer kaolin to take place of nanometer montorillonite clay as antiflaming synergic action bulking agent. It contains matrix resin, fire retardant, antiflaming synergic action bulking agent, lubricant, and antioxidant; the matrix resin is the mixture of ethylene vinyl acetate copolymer, thermoplastic elastomer and grafting compound. The fire retardant contains three type fire retardants; and the antiflaming synergic action bulking agent is kaolin. The weight portions of the constituents are: 100 portions matrix resin, 100-140 portions fire retardant, 10-30 portions, 1-5 portions lubricant, 1-3 portions antioxidant. The invention has the advantages of low cost, easy technology, and excellent flame retardant property.

Description

technical field [0001] The invention relates to a manufacturing technology of a flame-retardant composite material with ethylene-vinyl acetate copolymer as the main matrix resin, especially a low-smoke, halogen-free, non-phosphorus polyolefin flame-retardant cable with nano-kaolin as a flame-retardant synergist Sheath material. Background technique [0002] Flame-retardant cable sheathing materials are usually made of matrix resin with fillers such as flame retardants, lubricants and antioxidants. In addition to certain flame-retardant properties, they also require sufficient mechanical strength. The main indicators include Tensile strength, elongation at break, oxygen index, horizontal and vertical burning ratings, and more. The early flame-retardant cable sheath materials were almost all halogen-containing, and these products were eliminated because they easily released toxic gases and produced a lot of smoke when burned. Later, colleagues invented a halogen-free product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K5/54H01B7/295C08L23/06C08L51/00C08K3/22C08K3/34C08K5/10C08K5/524
Inventor 张文阳应建波
Owner NINGBO SHIP PLASTIC CO LTD
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