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Porcelainizable, halogen-free and flame-retardant EVA cable material and preparation method thereof

A technology of flame-retardant cable materials and inorganic flame retardants, which is applied in the field of plastic processing, can solve the problems of poor insulation of the vitrified layer, changes in appearance and size, and lack of protection, so as to achieve good insulation and flame retardancy. And the effect of suppressing smoke is remarkable, and the effect of ensuring normal transportation

Active Publication Date: 2018-06-15
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problems in the use of porcelain-resistant flame-retardant cable materials are: (1) The porcelain layer formed after high-temperature combustion expands outwards, not only the appearance and size change, but also the gap between the porcelain layer and the wire is formed ; (2) The insulation of the porcelain layer becomes poor, resulting in a short circuit of the line, which does not have a real protective effect

Method used

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  • Porcelainizable, halogen-free and flame-retardant EVA cable material and preparation method thereof
  • Porcelainizable, halogen-free and flame-retardant EVA cable material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of porcelain EVA halogen-free flame-retardant cable material includes the following steps: (1) 1 part of lubricant, 120 parts of inorganic flame retardant, 40 parts of porcelain filler, 20 parts of silicate filler, high temperature cracking catalyst 2 parts were mixed in a high-speed mixer for 5 minutes, unloaded for later use; (2) 80 parts of EVA, 20 parts of LLDPE, 10 parts of silicone rubber / white carbon black, 6 parts of compatibilizer, 2 parts of silicone masterbatch, antioxidant Mix 10100.2 parts of the agent in a mixer at 150°C for 3 minutes, pour the powdered material mixed in step (1) into the mixer and continue mixing for 8 minutes, then unload; (3) Mix the mixture in step (2) The refined material is moved to a twin-screw extruder, melted and extruded at a temperature of 120-160°C and a screw speed of 100r / min, and granulated to obtain porcelain-able EVA halogen-free flame-retardant cable material. .

[0033] The weight ratio of silicone rubbe...

Embodiment 2

[0036] The preparation of porcelain-able EVA halogen-free flame-retardant cable material includes the following steps: (1) Mix 110 parts of inorganic flame retardant, 50 parts of ceramic filler, 20 parts of silicate filler, and 3 parts of high-temperature cracking catalyst at high speed (2) 80 parts of EVA, 20 parts of LLDPE, 15 parts of silicone rubber / white carbon black, 6 parts of compatibilizer, 3 parts of silicone masterbatch, 10100.2 parts of antioxidant, in Mix in an internal mixer at 150°C for 3 minutes; pour the powdered material mixed in step (1) into the internal mixer and continue mixing for 8 minutes, and then unload; (3) transfer the mixed material in step (2) to a twin-screw extruder, melt-extruded and granulated under the condition of extruder temperature of 120-160°C and screw speed of 100r / min, to obtain porcelain-able EVA halogen-free flame-retardant cable material.

[0037] The weight ratio of silicone rubber / white carbon black is 100:50, the inorganic flam...

Embodiment 3

[0040] The preparation of porcelain-able EVA halogen-free flame-retardant cable material includes the following steps: (1) 120 parts of inorganic flame retardant, 50 parts of ceramic filler, 20 parts of silicate filler, and 2 parts of high-temperature cracking catalyst are mixed at high speed Mix in the mixer for 5 minutes, unload for later use; (2) first mix 100 parts of EVA, 10 parts of silicone rubber / white carbon black, 8 parts of compatibilizer, 3 parts of silicone masterbatch, 1 part of lubricant, and 10100.2 parts of antioxidant Mix for 3 minutes in an internal mixer at 150°C; pour the powdered material mixed in step (1) into the internal mixer and continue mixing for 8 minutes, then unload; (3) Mix well in step (2) The material is moved to a twin-screw extruder, melt-extruded and pelletized under the conditions of extruder temperature 120-160°C and screw speed 100r / min, to obtain porcelain-able EVA halogen-free flame-retardant cable material.

[0041] The weight ratio ...

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Abstract

The invention relates to a porcelainizable, halogen-free and flame-retardant EVA cable material and a preparation method thereof. The cable material comprises 60-100 parts of EVA, 0-40 parts of LLDPE,3-20 parts of silicone rubber / silica, 2-10 parts of a compatilizer, 1-8 parts of silicone master batches, 1-5 parts of a lubricant, 0.1-0.8 part of an antioxidant, 50-120 parts of an inorganic flameretardant, 20-80 parts of a porcelainizing filler, 5-50 parts of a silicate filler and 0.5-5 parts of a pyrolysis catalyst. The porcelainizable, halogen-free and flame-retardant EVA cable material hasremarkable flame-retarding and smoke-suppressing effects, and forms a hard porcelain layer when combusted at a high temperature; the formed porcelain layer has the advantages of inward shrinkage, noexpansion, small size change, certain strength and supporting ability, and maintenance of a complete form under high temperature combustion; and the addition of the pyrolysis catalyst promotes the cracking of a carbon layer in order to make the porcelain layer maintain a good insulation property, so the normal transmission of electric power is still ensured when in a fire hazard and continuous-electricity situation.

Description

technical field [0001] The invention belongs to the technical field of plastic processing, and relates to a porcelain-able EVA halogen-free flame-retardant cable material, in particular to a porcelain-able EVA halogen-free flame-retardant cable material and a preparation method thereof. Background technique [0002] Ethylene-vinyl acetate copolymer (EVA) is widely used as insulation material and sheath material of various wires and cables because of its good flexibility, good low temperature resistance, environmental stress crack resistance and good insulation. Porcelainized EVA halogen-free flame-retardant cable material, in addition to maintaining the excellent performance of EVA and smoke-suppressing and flame-retardant properties, will form a layer of porcelain layer with certain strength and supporting capacity when burning at high temperature, and can still be used after continuous high-temperature burning Maintaining the integrity of the product can prevent the spread...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L83/04C08L51/06C08K13/02C08K3/36C08K5/134C08K3/22C08K3/38C08K3/40C08K7/08H01B3/44
CPCC08K2003/2224C08K2003/2227C08K2003/387C08L23/0853C08L2201/02C08L2201/22C08L2203/202C08L2205/025C08L2205/035H01B3/441C08L23/0815C08L83/04C08L51/06C08K13/02C08K3/36C08K5/1345C08K3/22C08K3/38C08K3/40C08K7/08
Inventor 崔永岩段盛元杨瀚高文敬
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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