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    • 2. 发明授权
    • Multi-layer hermetically sealable film
    • 多层密封膜
    • US06326068B1
    • 2001-12-04
    • US09435559
    • 1999-11-08
    • Dan-Cheng KongRichard A. RehkuglerDonald F. Sexton
    • Dan-Cheng KongRichard A. RehkuglerDonald F. Sexton
    • B29D2200
    • A multi-layer film has an improved composite structure for providing hermetic seals to packages manufactured in high speed packaging apparatus. The structure of the multi-layer film includes layers A/B/C/D. Skin layer A is formed from polypropylene copolymer with melt flow rate greater than one or linear high density polyethylene with melt index greater than one. Core layer B is formed from polypropylene. Intermediate layer C has the primary function of compliance during sealing, and sealing layer D has the primary function of providing adhesivity to the completed seal. The sealing layer D includes an antiblocking agent comprising non-distortable organic polymer particles having an average particle size greater than 6 microns
    • 多层膜具有改进的复合结构,用于向高速包装设备中制造的包装提供气密密封。 多层膜的结构包括层A / B / C / D。 表层A由聚丙烯共聚物形成,其熔体流动速率大于一种或高达一线的高密度聚乙烯,其熔体指数大于1。 芯层B由聚丙烯形成。 中间层C在密封过程中具有一致性的主要功能,密封层D具有为完成的密封提供粘合性的主要功能。 密封层D包括具有平均粒度大于6微米的不变形有机聚合物颗粒的防粘连剂