Patents by Inventor Liping Rong

Liping Rong has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Heat shrinkable polyolefin film and a preparation method thereof
    Patent number: 10005262
    Abstract: The present invention relates to a biaxially oriented polyolefin multilayer heat shrinkable film, which is a multilayer heat shrinkable film with at least three laminated layers, and has internal and external surface layers of a resin composition comprising 70-80 wt % of an ethylene-norbornene copolymer having a glass-transition temperature (Tg) of 138° C. and a norbornene content of 76 wt %, and 20-30 wt % of an ethylene-propylene random copolymer having a melting point (Tm) of 140° C.; and a core layer comprising 54 wt % of an ethylene-propylene random copolymer having Tm of 140° C., 8 wt % of an ethylene-butylene random copolymer having Tm of 66° C., 20 wt % of an ethylene-norbornene copolymer having Tg of 78° C. and norbornene content of 65 wt %, and 18 wt % of a hydrogenated petroleum resin having softening point (Ts) of 140° C.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: June 26, 2018
    Assignees: Guangdong Decro Film New Materials Co., Ltd., Guangdong Decro Package Films Co., Ltd.
    Inventors: Zhuorong Hu, Xiaoming Zou, Wenshu Xu, Jianmin Zhu, Xiongrui Ou, Liping Rong
  • HEAT SHRINKABLE POLYOLEFIN FILM AND A PREPARATION METHOD THEREOF
    Publication number: 20140353197
    Abstract: The present invention relates to a biaxially oriented polyolefin multilayer heat shrinkable film, which is a multilayer heat shrinkable film with at least three laminated layers, and has internal and external surface layers of a resin composition comprising 70-80 wt % of an ethylene-norbornene copolymer having a glass-transition temperature (Tg) of 138° C. and a norbornene content of 76 wt %, and 20-30 wt % of an ethylene-propylene random copolymer having a melting point (Tm) of 140° C.; and a core layer comprising 54 wt % of an ethylene-propylene random copolymer having Tm of 140° C., 8 wt % of an ethylene-butylene random copolymer having Tm of 66° C., 20 wt % of an ethylene-norbornene copolymer having Tg of 78° C. and norbornene content of 65 wt %, and 18 wt % of a hydrogenated petroleum resin having softening point (Ts) of 140° C.
    Type: Application
    Filed: November 27, 2012
    Publication date: December 4, 2014
    Inventors: Zhuorong Hu, Xiaoming Zou, Wenshu Xu, Jianmin Zhu, Xiongrui Ou, Liping Rong