国家/地区 中国（3）
IPC部 B（3）
IPC大类 B29（3） C08（3）
IPC小类 B29C（3）
IPC C08K003/04（3）
发明人
公开年 2021（3）
申请年 2020（3） 
专利权人

Preparing high strength waterproof packing box, comprises e.g. crushing the waste polyethylene plastic by crusher, selecting the particle diameter collected by the sorting machine and taking methyl etherified melamine formaldehyde resin.

MA J

Preparing polyethylene material involves selecting ethylene raw materials and placing in radiation chamber, and irradiating ethylene raw materials in radiation chamber with ultraviolet rays.

WANG L

Special foam board for food packaging, is prepared by stirring polycarbonate, polysulfone resin and polyurethane, adding carbon black, graphene, asbestos and chitosan quaternary ammonium salt, crushing, heating with bamboo fiber and foaming.

YAO D