The application relates to the technical field of
polyvinyl chloride sleeves, and discloses a
flame-retardant PVC sleeve and a preparation method thereof. The
flame-retardant PVC sleeve comprises an inner tube, a
metal copper mesh coated on the outer side of the inner tube, and an outer tube coated on the outer sides of the
metal copper mesh and the inner tube by injection molding. The
raw material of the inner tube comprises the following components: 80-150 parts of
polyvinyl chloride, 1-3 parts of
chlorinated polyethylene, 20-40 parts of active nano
calcium carbonate, 1-2 parts of paraffin, 1-2 parts of
stearic acid, 1-3 parts of a
flame retardant, and 1-2 parts of a
calcium-
zinc stabilizer. The
raw material of the outer tube comprises the following components: 50-120 parts of
polyvinyl chloride, 1-5 parts of activated
fiber, 10-20 parts of active nano
calcium carbonate, 1-2 parts of
zeolite powder, 1-2 parts of
magnesium oxide, 1-2 parts of paraffin, 1-2 parts of
polyethylene wax, 1-2 parts of
stearic acid, 1-5 parts of a flame retardant, 1-3 parts of a calcium-
zinc stabilizer, and 1-2 parts of a
processing aid LPA40. The application further discloses a preparation method of the flame-retardant PVC sleeve.