国家/地区 中国（4）
IPC部 B（4）
IPC大类 C09（4） B05（2） B32（2）
IPC小类 C09D（4）
IPC C09D007/61（3） B32B033/00（2） C09D163/00（2）
发明人 LI R（4）
公开年 2021（2） 2023（2）
申请年 2022（2） 
专利权人

High-transparent and high-strength polyethylene heat-shrinkable film useful for packaging bottle-packed beverage, comprises e.g. first layer (comprised of low-density and metallocene polyethylene), second layer, third layer and fourth layer (comprised of high density polyethylene).

LIU Z, LI R, LIU S

Preparing coating for screw thread, comprises e.g. providing workpieces with screw thread, pretreating screw thread part of workpieces with screw thread; sandblasting workpiece with screw thread after pretreatment; and preheating workpiece with screw thread after sandblasting.

SUN J, WANG Y, WANG L, LI R, SONG X, LIU X

Water-based intelligent far-infrared functional ink used in heating film composite material, includes water-based positive temperature coefficient functional material emulsion, thermally conductive filler, and auxiliary agent.

CHEN S, LI R, ZHANG H, SUN Y, WANG B, LING H, CHANG G, WANG Y

Anti-sulfur inner coating anti-corrosion structure of medium and large container useful in oil and gas field, comprises water blasting treatment layer on metal substrate, bottom air spraying layer, and surface air spraying layer.

LUO J, DU Y, LI R