国家/地区 中国（5）
IPC部 C（5）
IPC大类 C09（5）
IPC小类 F16L（5） C08K（4） C08L（4）
C09D（3） B29D（2）
IPC F16L009/14（5）
发明人
公开年 2021（2） 2022（2）
申请年 2022（3）  2020（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

Modified polyethylene wearable composite pipe for water supply and drainage of municipal and building, has glass fiber line that is provided with multiple layers on outer layer pipe structure, inner tube body and outer layer pipe body fixedly connected with the inner layer pipe body.

LIN J

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

High heat-conducting graphene floor heating pipe comprises pipe body, polyethylene layer, steel wire net layer, and graphene heat-conducting layer including graphite, antioxidant, dispersant, coupling agent, heat stabilizer, and plasticizer.

XU W, LIU Y, ZHANG H

Self-adhesive polymer modified bitumen waterproofing membrane used in e.g. anti-corrosion pipeline engineering, comprises road petroleum asphalt, aromatic oil, styrene-butadiene-styrene, calcium carbonate and modified rubber powder.

CAI W