国家/地区 中国（5）
IPC部 C（5）
IPC大类 C08（5）
IPC小类 C08K（5）
IPC C08K003/26（5）
发明人
公开年 2022（3） 2023（2）
申请年 2022（5）
专利权人

High density polyethylene corrugated pipe useful in the field of transportation and construction, comprises inner wall and outer wall, where the inner wall includes enhanced HDPE master batch, magnesium carbonate, zinc sulfide, pentaerythritol ester and polyethylene wax.

LI W, JIANG J, ZHANG Y

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 core-shell masterbatch toughened polypropylene random copolymer (PPR) pipe comprises tube body comprising outer layer, middle layer and inner layer, where outer layer comprises PPR resin, modified nano-calcium carbonate and dispersant.

MO Y, LU Z, LI Y, LI H, SHI K, LIANG Y, LAN J

Weather-resistant drainage pipeline with multilayer structure, comprises an inner layer, an intermediate layer and an outer layer, where the intermediate layer pipe comprises PVC resin, calcium carbonate powder, calcium-zinc heat stabilizer, solid plasticizer, processing aid and toughening modifier.

HUO F, CHEN H, SONG Q, FENG 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