国家/地区 中国（4）
IPC部 B（4）
IPC大类 C09（4）
IPC小类 C09D（4） F16L（4） B05D（3）
C08L（3） B05B（2） C08K（2）
IPC C09D005/08（4）
发明人
公开年
申请年 2022（2） 
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 pipe material comprises cleaning mineral-inorganic composite materials, grinding, melting, casting and forming in combination with pipe mold by means of centrifugal casting, demolding and cooling, heating and densifying, and coating anti-corrosion coating.

WANG P

Corrosion resistant polyethylene water supply pipe material comprises base layer and anticorrosive graphene coating comprising polyethylene, color master batch, epoxy resin and dispersant.

LIU J, WANG J, LI H

Used-steel-pipe anticorrosive coating comprises asphalt, dispersant, graphene, polyphenylene ether resin powder, styrene butadiene rubber, toluene, plasticizer, coupling agent, additive, flame retardant and water.

MAO L