China Plastics ›› 2025, Vol. 39 ›› Issue (3): 41-47.DOI: 10.19491/j.issn.1001-9278.2025.03.008

• Materials and Properties • Previous Articles     Next Articles

Development and performance of PE/PP/micron SiO2 matting and heat⁃sealing film

SU Yuhang1,4(), LIN Yuanzhi1,4(), MAO Jianquan2, WANG Yongxiang2, LIU Xiang3, YU Li1,5, KE Junmu1,5, CHEN Yishi1   

  1. 1.Fujian Polytechnic Normal University,Fuzhou 350300,China
    2.FOROP Advanced Materials Co,Ltd,Fuzhou 350300,China
    3.Tianjin Huaheng Packaging Materials Co,Ltd,Tianjin 300450,China
    4.Fujian Universities and Colleges Engineering Research Center of Soft Plastic Packaging Technology for Food,Fuzhou 350300,China
    5.Technical Creation Center for Packaging Engineering in Fuzhou,Fuzhou 350300,China
  • Received:2024-05-21 Online:2025-03-26 Published:2025-03-24

Abstract:

The composite structure of a three⁃layered matting and heat⁃sealing film was designed by selecting suitable polyethylene (PE) and polypropylene (PP) as visual layer materials and adding micron SiO2 into the core layer to improve the haze of the film. The film was prepared by using a three⁃layer co⁃extrusion casting method, and its properties were investigated. The results indicated that PE⁃HD and copolymerization⁃type PP could be combined to form the best matting material. With an increase in the PE⁃HD content in the visual layer, the PE⁃HD/PP hybrid system obtained an improvement in the impact strength, storage modulus, and loss modulus, indicating a reinforcing and toughening effect on the film. This also, accelerated the crystallization rate of the PE⁃HD/PP hybrid system and promoted the haze formation of the film. The film showed a haze of 80 % and a gloss of 7.8 % at a PE⁃HD content of 40 wt% in the visual layer along with an optimal matting effect. The film also presented the highest tensile strength of 29.5 MPa and the highest elongation at break of 64 % at a micron SiO2 content of 3 wt% in the core layer. The film obtained a light transmittance of 58.8 %, and its haze increased to 82.3 %.

Key words: matting film, heat sealing, micron silicon dioxide, haze, three?layer cast co?extrusion

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