Flame-retardant heat shrinkable film and manufacturing method thereof
A technology of heat shrinkable film and manufacturing method, which is applied in the field of flame retardant materials, can solve the problems of wide application range, single performance of heat shrinkable film, and inability to be flame retardant, and achieve good dimensional stability, high hardness, and flame retardant effects Good results
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[0027] Example 1
[0028] A flame-retardant heat shrinkable film, comprising the following parts by weight:
[0029] PET resin 65%, phosphate ester 5%, hindered amine light stabilizer 3%, phosphite antioxidant 2%, zinc stearate 6%, brominated polystyrene 6%, silicon-containing flame retardant epoxy resin 10 % And fatty alcohol polyoxyethylene ether 3%;
[0030] The manufacturing method of this flame-retardant heat shrinkable film includes the following steps:
[0031] 1) Weigh the above-mentioned raw materials; add to the reactor, stir and react at 260°C for 6 hours to obtain a polymer melt at a stirring speed of 200 rpm, and then extrude the polymer melt to pelletize and dry to obtain PET chips;
[0032] 2) The PET chips obtained in step 1) are melt-extruded, cast-stretched, and cooled and shaped to obtain a PET flame-retardant heat shrinkable film, and the stretching temperature is 140°C.
Example Embodiment
[0033] Example 2
[0034] A flame-retardant heat shrinkable film, comprising the following parts by weight:
[0035] PET resin 60%, phosphate ester 7%, hindered amine light stabilizer 3%, phosphite antioxidant 2%, zinc stearate 6%, brominated polystyrene 10%, silicon-containing flame retardant epoxy resin 10 % And fatty alcohol polyoxyethylene ether 2%;
[0036] The manufacturing method of this flame-retardant heat shrinkable film includes the following steps:
[0037] 1) Weigh the above-mentioned raw materials; add them to the reactor, stir and react at 250°C for 6 hours to obtain a polymer melt, at a stirring speed of 180 rpm, and then extrude the polymer melt to pelletize and dry to obtain PET chips;
[0038] 2) The PET chips obtained in step 1) are melt-extruded, casted, stretched, and cooled and shaped to obtain a PET flame-retardant heat shrinkable film, and the stretching temperature is 130°C.
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