The invention relates to a method for preparing halogen-free flame retardant wire and cable materials, which is characterized in that the halogen-free flame retardant wire and cable materials are made of the following row materials by the percentage in weight: 40-80 per cent of polyethylenes, 5-40 per cent of intumescent flame retardants, 1-30 per cent of auxiliary flame retardants, 0.1-1 per cent of antioxidants, 0.1-1 per cent of lubricants and 2-5 per cent of compatibilizers. The preparation method comprises the following steps: the raw materials are scaled and taken according to a weight proportion; all the materials are put into a high mixing machine to be mixed for 2-5 minutes; the materials are taken out; the mixed materials are put into a screw compressor for extruding granulations. The rotating speed of the screw compressor is 180-600r/min and the temperature is 150-170 DEG C. The invention has the advantages that the new halogen-free and intumescent flame retardant and the auxiliary flame retardant are adopted and matched with an advanced formula design, and a halogen-free flame retardant wire and cable materials are prepared, which conforms with demands of environment protection and is widely used in fields of automotive, electronics and electrics, building and engineering.

Title
Preparation of low-smoke halogen-free flame-retardant electric wire and cable material
Application Number
200610147542
Publication Number
101205325
Application Date
December 20, 2006
Publication Date
June 25, 2008
Inventor
Wang Yonghe
Meng Chengming
Li Maolin
Agent
wengre ying
Assignee
Shanghai Sunny Company
IPC
C08L 51/06
C08K 05/09
C08K 03/00
B29C 47/92
B29B 09/12
H01B 07/295
C08K 05/524
C08L 23/06