Halogen-free intumescent flame-retardant polypropylene/ethylene vinyl acetate cable material
A technology of ethylene vinyl acetate and flame retardant polypropylene, which is used in insulated cables, cables, circuits, etc., can solve the problems of poor mechanical properties of cable materials, poor environmental stress crack resistance, and poor compatibility with polar flame retardants. , to achieve the effects of improving mechanical properties and combustion properties, improving hygroscopicity, and improving compatibility
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Embodiment 1
[0007] Raw material components are by weight:
[0008] Polypropylene 40,
[0009] Ethylene vinyl acetate 60,
[0010] Grafting agent (maleic anhydride grafted ethylene-octene copolymer) 15,
[0011] Composite flame retardant 65,
[0012] Antioxidant (tetrakis(β3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) pentaerythritol ester) 2,
[0013] UV absorber (2-hydroxy-4-n-octyloxybenzophenone) 1,
[0014] Processing aid (polyethylene wax) 2.
[0015] in,
[0016] Composite flame retardant is by weight:
[0017] Basic flame retardant (ammonium polyphosphate: pentaerythritol: melamine=30:15:5) 50,
[0018] Flame retardant synergist (zinc borate, white microencapsulated red phosphorus) 15.
[0019] The above-mentioned raw materials are weighed and mixed by a high-speed mixer, and then melted and extruded by a twin-screw extruder, drawn, water-cooled, and pelletized. The six-stage processing temperatures of the twin-screw extruder are 155-160°C, 160-165°C, 170-175°C, 175-185...
Embodiment 2
[0021] Raw material components are by weight:
[0022] Polypropylene 30,
[0023] Ethylene vinyl acetate 70,
[0024] Composite flame retardant 57,
[0025] Grafting agent (maleic anhydride grafted polyethylene) 10,
[0026] Antioxidant (tetra(β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester,
[0027] dilauryl thiodipropionate) 1,
[0028] UV absorber (2-(2'-hydroxy-3', 5-di-tert-butylphenyl) benzotriazole) 1.5,
[0029] Processing aids (polyethylene wax, calcium stearate, zinc stearate) 3.
[0030] in,
[0031] Composite flame retardant is by weight:
[0032] Basic flame retardant (polyphosphoric acid: pentaerythritol: melamine=35:10:2) 47,
[0033] Flame retardant synergist (zinc borate, white microcapsule red phosphorus, organic silicon) 10.
[0034] The above-mentioned raw materials are weighed and mixed by a high-speed mixer, and then melted and extruded by a twin-screw extruder, drawn, water-cooled, and pelletized. The six-stage processin...
Embodiment 3
[0036] Raw material components are by weight:
[0037] Polypropylene 20,
[0038] Ethylene vinyl acetate 80,
[0039] Grafting agent (maleic anhydride grafted polypropylene) 5,
[0040] Composite flame retardant 45,
[0041] Antioxidant (tetra(3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester,
[0042] Tris[2.4-di-tert-butylphenyl]phosphite,
[0043] 2-hydroxy-4-n-octyloxybenzophenone) 1.5,
[0044] UV absorber (5′-di-tert-butylphenyl-5-chlorobenzotriazole) 2
[0045] Processing aids (zinc stearate, calcium stearate) 1.
[0046] in,
[0047] Composite flame retardant is by weight:
[0048] Basic flame retardant (ammonium polyphosphate: pentaerythritol: melamine=25:12:3) 40,
[0049] Flame retardant synergist (zinc borate, white microcapsule red phosphorus, nano-montmorillonite,
[0050] Silicone) 5.
[0051] The above-mentioned raw materials are weighed and mixed by a high-speed mixer, and then melted and extruded by a twin-screw extruder, drawn,...
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