国家/地区 中国（2）
IPC部 C（2）
IPC大类 C09（2）
IPC小类 C09D（2）
IPC C09D005/38（2）
发明人 LIU Z（2）
公开年
申请年
专利权人

Preparing internal spiral polyvinyl chloride drainage pipe, comprises e.g. bending and spiraling steel wire, extruding, injecting into brushing mechanism, carrying out spiral groove processing, forming inner spiral groove, spraying, extruding, painting and performing preliminary drying.

LIU Z

Preparing modified graphene coating material by performing preparation of graphene, raw material ratio, and mixing processing using modified resin, graphene, graphene-dispersant, nano-titanium powder, solvent and catalyst.

WEI P, LIU Z, WANG Z, MIAO C, ZHANG K