The invention belongs to the technical field of
high polymer material
processing, and particularly relates to a heat-resistant full-biodegradable
straw which comprises the following components in parts by
mass: 100 parts of full-biodegradable resin, 3-5 parts of a nucleating agent, 2-4 parts of a chain
extender, 20-35 parts of an
inorganic filler, 1-2 parts of a
lubricant, 1-2 parts of a compatibilizer and 20-30 parts of a
biomass filler. The preparation method comprises the following steps of: firstly, putting the
inorganic filler, the
biomass filler, the
lubricant and the compatibilizer into high-temperature mixing equipment, stirring at a high speed for modification, then adding the full-biodegradable resin, the chain
extender and the nucleating agent, uniformly mixing, then putting the raw materials into an internal mixer for internal mixing, putting the internally mixed blend into a double-screw extruder, extruding and granulating, then adding the obtained material into a suction tube extruder, extruding the material into a tube shape, then stretching the tube into post-
processing equipment, enabling the tube to quickly pass through the equipment for secondary
crystallization, and finally
cutting the tube into a preset length. The
heat resistance of the full-biodegradable
straw can be remarkably improved, so that the full-biodegradable
straw can be applied to more use scenes, the
product value is improved, the
processing efficiency is high, and better
economic benefits are obtained.