国家/地区 中国（60） 世界知识产权组织（8） 欧洲专利局（EPO）（6） 韩国（5） 美国（5） 加拿大（3） 印度（2） 日本（2）
IPC部 C（70）
IPC大类 C08（70）
IPC小类 F16L（70）
IPC C08K003/04（52） C08L023/06（33） F16L009/12（24）
C08K013/06（14） F16L009/14（13） B29D023/00（12）
C08K003/22（12） C08K009/04（12） B32B001/08（11）
B32B027/32（11） C08K003/26（9） C08K003/36（9）
C08K009/06（9） C08L023/08（9） C08K003/34（8）
发明人 LIU J（8） WANG J（7） TIAN X（4）
ZHOU W（4） FU Y（3） LI H（3）
LIU W（3） LIU Z（3） WAN G（3）
WANG L（3） ZHANG Y（3） CHEN H（2）
GAO Y（2） HUANG Y（2） HUO F（2）
公开年 2021（24） 2022（16） 2018（7） 2017（5） 2023（5） 2016（4） 2013（3） 2015（3）
申请年 2020（18）  2021（14）  2022（14）  2017（10）  2016（6）  2013（3）  2014（2） 
专利权人 ANHUI GLANT .（8） ANHUI CHAOXI.（2） GUIZHOU LIZH.（2） LEE J H（2）
LINHAI WEIXI.（2） RIFENG ENTER.（2） RIFENG TECHN.（2）

Double-wall corrugated pipe material outer wall and inner wall, where outer wall comprises e.g. chlorinated polyvinyl chloride resin, grafted polyethylene solubilizer, light shielding agent, ultraviolet light absorber, strengthening agent graphene, lubricant, and nano calcium carbonate.

LUO Q, YE C, ZHENG S, CHEN G, ZHANG S

Synthetic resin pipe reinforced with improved outer peel layer comprises e.g. main layer comprising main body, inner peel layer formed as thin film on inner circumferential surface of main layer made up of vinyl chloride, and polyethylene.

HWAN K J

High-strength polyethylene pipe fittings comprises e.g. polyethylen outer layer, middle layer and inner layer, where outer layer is embedded at outer side of middle layer, and middle layer is provided with reinforcing layer and reinforcing layer is net-shaped structure or planar structure.

CHEN J, CHEN Z, PAN X

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

Double insulation type self-limiting temperature heating cable used in electric heating element, comprises two parallel metal wire cores whose outside is covered with PTC material layer, where PTC material layer is covered with inner insulating layer and flame-retardant outer insulating layer.

JI C

Rubber tube useful for underground hydraulic transmission, comprises e.g. inner rubber layer set inside composite layer and outer rubber layer set outside composite layer, where metal weaving layer is compounded on middle rubber layer, and outer rubber layer is compounded on metal weaving layer.

WANG Y, HU X, HAN W, JIA X, LIU G, LI X

Fiber reinforced plastic electro-fusion pipe with independent control of mechanical performance and electrical performance comprises electric melting pipe main body embedded with resistance wire, and provided with two binding posts respectively connected to two ends of resistance wire.

HU Z, ZHENG J, SHI J, YAO R

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

High-strength temperature medium conveying pipeline comprises e.g. rigid reinforcing layer, polyethylene of raised temperature resistance modified foam layer, anisotropic plane high thermal conductivity graphene layer and inner core pipe in turn from outside to inside.

WANG J, SONG Q, HUO F, CHU Z