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    Process for producing ultrasonic seal, and film structures and flexible containers with same
    1.
    发明授权
    Process for producing ultrasonic seal, and film structures and flexible containers with same 有权

    公开(公告)号：US10293575B2

    公开(公告)日：2019-05-21

    申请号：US14776862

    申请日：2014-04-09

    Applicant: Dow Global Technologies LLC

    Inventor： Selim Bensason ,  Jozef J. Van Dun ,  Gagan Saini

    IPC: B32B7/12 ,  B32B27/32 ,  B32B15/08 ,  B32B27/08 ,  B32B27/34 ,  B32B37/06 ,  B32B27/36 ,  B29C65/08 ,  B29C65/82 ,  B29C65/00

    Abstract: The present disclosure is directed to processes for producing ultrasonic sealable film structures and flexible containers with ultrasonic seals. The film structure includes a first multilayer film and a second multilayer film. Each multilayer film includes a backing layer and a seal layer. Each seal layer includes an ultrasonic sealable olefin-based polymer (USOP) having the following properties: (a) a heat of melting, ΔHm, less than 130 J/g, (b) a peak melting temperature, Tm, less than 125° C., (c) a storage modulus in shear (G′) from 50 MPa to 500 MPa, and (d) a loss modulus in shear (G″) greater than 10 MPa. The multilayer films are arranged such that the seal layer of the first multilayer film is in contact with the seal layer of the second multilayer film. The seal layers form an ultrasonic seal having a seal strength from 30 N/15 mm to 80 N/15 mm when ultrasonically sealed at 4 N/mm seal force.

    SEALANT COMPOSITION
    3.
    发明申请
    SEALANT COMPOSITION 审中-公开
    密封组合物

    公开(公告)号：US20150232711A1

    公开(公告)日：2015-08-20

    申请号：US14422399

    申请日：2013-10-01

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： Mridula Kapur ,  Jian Wang ,  Gagan Saini ,  Mustafa Bilgen ,  Troy M. Tambling ,  Robert N. Reib

    IPC: C09J123/08

    CPC classification number: C09J123/0815 ,  C08F210/16 ,  C08F10/00 ,  C08F4/65925 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/17 ,  C08F2500/03

    Abstract: The instant invention provides a sealant composition, method of producing the same, film layers and multilayer structures made therefrom. The linear low density polyethylene composition suitable for sealant applications according to the present invention comprises: less than or equal to 100 percent by weight of the units derived from ethylene; less than 35 percent by weight of units derived from one or more α-olefin comonomers; wherein said linear low density polyethylene composition has a density in the range of 0.900 to 0.920 g/cm3, a molecular weight distribution (Mw/Mn) in the range of 2.5 to 4.5, a melt index (I2) in the range of 0.5 to 3 g/10 minutes, a molecular weight distribution (Mz/Mw) in the range of from 2.2 to 3, vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of said composition, and a zero shear viscosity ratio (ZSVR) in the range from 1.0 to 1.2.

    Abstract translation: 本发明提供一种密封剂组合物，其制备方法，由其制成的薄膜层和多层结构。 适用于根据本发明的密封剂应用的线性低密度聚乙烯组合物包含：小于或等于100重量％的衍生自乙烯的单元; 少于35重量％的衍生自一种或多种α-烯烃共聚单体的单元; 其中所述线性低密度聚乙烯组合物的密度在0.900至0.920g / cm 3范围内，分子量分布（Mw / Mn）在2.5至4.5的范围内，熔体指数（I 2）在0.5至 3克/ 10分钟，分子量分布（Mz / Mw）在2.2至3范围内，乙烯基不饱和度小于0.1个乙烯基，每1000个碳原子存在于所述组合物的主链中，零剪切粘度比 （ZSVR）范围为1.0到1.2。

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