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    Flexible film composition for heat seals and container with same
    2.
    发明授权
    Flexible film composition for heat seals and container with same 有权

    公开(公告)号：US10239676B2

    公开(公告)日：2019-03-26

    申请号：US15027879

    申请日：2014-10-10

    Applicant: Dow Global Technologies LLC

    Inventor： Chuan Yar Lai ,  Kurt Brunner ,  Jozef J.i. Van Dun ,  Nicolas C. Mazzola ,  Maria Isabel Arroyo Villan

    IPC: B65D65/02 ,  B32B7/12 ,  B32B27/06 ,  B32B27/08 ,  B32B27/30 ,  B32B27/32 ,  B32B27/34 ,  B32B27/36 ,  B32B7/02

    Abstract: The present disclosure is directed to compositions and film structures suitable for heat seal production. The heat sealable flexible film structure includes: a layer (A) comprising a blend comprising from 35 to 80 percent by weight of the layer (A) of a propylene based plastomer or elastomer (“PBPE”) and from 20 to 65 percent by weight of the layer (A) of a low density polyethylene having a density in the range of from 0.915 g/cm3 to 0.935 g/cm3, wherein the blend has a melt index (as determined according to ASTM D 1238 (at 190° C./2.16 Kg); a layer (B), adjacent to layer (A), comprising a polyolefin-based polymer, wherein the polymer or polymer blend which makes up layer (B) flows more easily than the blend of layer (A) under conditions intended for making a hard seal with the film structure; and an outermost layer (C) comprising a material having a melting point greater than 140° C.; wherein the ratio of the thickness of layer (B) to the thickness of layer (A) is 3:1 or greater. The heat sealable flexible film structure is used to make a flexible container having one or more heat seals. The heat seal can be a frangible heat seal, a hard heat seal, or a combination of frangible heat seals and hard heat seals depending on the sealing conditions.

    STRETCH-SLEEVE FILM
    3.
    发明申请
    STRETCH-SLEEVE FILM 审中-公开
    拉伸膜片

    公开(公告)号：US20160059510A1

    公开(公告)日：2016-03-03

    申请号：US14781624

    申请日：2014-04-15

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： Kurt Brunner ,  Hans Jörg Forster ,  Thomas Galatik

    IPC: B32B1/08 ,  B32B27/32 ,  B32B27/08

    CPC classification number: B32B1/08 ,  B29C55/24 ,  B29C63/18 ,  B29L2009/00 ,  B32B1/02 ,  B32B27/08 ,  B32B27/32 ,  B32B33/00 ,  B32B2270/00 ,  B32B2307/54 ,  B32B2307/72 ,  B32B2323/046 ,  B32B2439/00

    Abstract: The present invention concerns a film (1), which contains at least one inner layer (3, 4, 5) and two outer layers (2, 6) enclosing at least one inner layer (3, 4, 5) where the, at least one, inner layer (3, 4, 5) contains a polymer A in a quantity from 70 to 100 wt. %, preferably 80 to 99 wt. % and especially preferably from 90 to 99 wt. %, relative to the total weight of the inner layer (3, 4, 5), which is characterized by special interesting properties, where the outer layers (2, 6) contain a mixture of polymer A and a polymer B, where polymer B is selected from the group consisting of low-density polyethylenes, said film (1) having a thickness from 30 to 70 μm, preferably 35 to 60 μm and especially 40 to 55 and an elastic restoring capacity of more than 95% at an elongation of 55%. The present invention also concerns a process for the production of a film, the use of the wealth. As a stretch-sleeve up film and articles provided with the oil of the invention, such as packaging. The present disclosure is directed to a stretch-sleeve film and articles including the stretch-sleeve film. The stretch-sleeve film includes at least three layers including two skin layers and a core layer. The core layer includes at least 75 wt % of an ethylene/a-olefin copolymer (A) characterized by (i) a density from 0.890 g/cc to 0.920 g/cc; (ii) a Mw/Mn from 2.0 to 4.0; (iii) a ZSVR less than 6.0; and (iv) a CDC from 85 to 150. At least one skin layer includes a polymeric material selected from the ethylene/a-olefin copolymer (A), a low density polyethylene, a medium density polyethylene, and combinations thereof. The stretch-sleeve film has an elastic recovery at 55% stretch of at least 95%.

    Abstract translation: 本发明涉及一种膜（1），其包含至少一个内层（3,4,5）和两个包围至少一个内层（3,4,5）的外层（2,6），其中，在 至少一个，内层（3,4,5）含有70至100重量％的聚合物A。 ％，优选80〜99wt。 ％，特别优选为90〜99重量％。 相对于内层（3,4,5）的总重量，其特征在于特殊的有趣性质，其中外层（2,6）含有聚合物A和聚合物B的混合物，其中聚合物B 选自低密度聚乙烯，所述膜（1）的厚度为30〜70μm，优选为35〜60μm，特别优选为40〜55，弹性恢复能力在伸长率时大于95％ 55％。 本发明还涉及制作薄膜的方法，使用这种财富。 作为拉伸套管膜和具有本发明的油的物品，例如包装。 本公开涉及拉伸套筒膜和包括拉伸套筒膜的制品。 拉伸套筒膜包括至少三层，包括两个表皮层和芯层。 芯层包括至少75wt％的乙烯/α-烯烃共聚物（A），其特征在于（i）密度为0.890g / cc至0.920g / cc; （ii）2.0〜4.0的Mw / Mn; （iii）小于6.0的ZSVR; 至少一个表皮层包括选自乙烯/α-烯烃共聚物（A），低密度聚乙烯，中密度聚乙烯及其组合的聚合物材料。 拉伸套筒膜在55％拉伸时的弹性回复率至少为95％。

    Stretch-sleeve film
    5.
    发明授权
    Stretch-sleeve film 有权

    公开(公告)号：US10343367B2

    公开(公告)日：2019-07-09

    申请号：US14781624

    申请日：2014-04-15

    Applicant: Dow Global Technologies LLC

    Inventor： Kurt Brunner ,  Hans Jörg Forster ,  Thomas Galatik

    IPC: B32B1/08 ,  B32B27/08 ,  B32B27/32 ,  B32B1/02 ,  B32B33/00 ,  B29C63/18 ,  B29C55/24 ,  B29L9/00

    Abstract: The present invention concerns a film (1), which contains at least one inner layer (3, 4, 5) and two outer layers (2, 6) enclosing at least one inner layer (3, 4, 5) where the, at least one, inner layer (3, 4, 5) contains a polymer A in a quantity from 70 to 100 wt. %, preferably 80 to 99 wt. % and especially preferably from 90 to 99 wt. %, relative to the total weight of the inner layer (3, 4, 5), which is characterized by special interesting properties, where the outer layers (2, 6) contain a mixture of polymer A and a polymer B, where polymer B is selected from the group consisting of low-density polyethylenes, said film (1) having a thickness from 30 to 70 μm, preferably 35 to 60 μm and especially 40 to 55 and an elastic restoring capacity of more than 95% at an elongation of 55%. The present invention also concerns a process for the production of a film, the use of the wealth. As a stretch-sleeve up film and articles provided with the oil of the invention, such as packaging. The present disclosure is directed to a stretch-sleeve film and articles including the stretch-sleeve film. The stretch-sleeve film includes at least three layers including two skin layers and a core layer. The core layer includes at least 75 wt % of an ethylene/a-olefin copolymer (A) characterized by (i) a density from 0.890 g/cc to 0.920 g/cc; (ii) a Mw/Mn from 2.0 to 4.0; (iii) a ZSVR less than 6.0; and (iv) a CDC from 85 to 150. At least one skin layer includes a polymeric material selected from the ethylene/a-olefin copolymer (A), a low density polyethylene, a medium density polyethylene, and combinations thereof. The stretch-sleeve film has an elastic recovery at 55% stretch of at least 95%.

    FLEXIBLE FILM COMPOSITION FOR HEAT SEALS AND CONTAINER WITH SAME
    6.
    发明申请
    FLEXIBLE FILM COMPOSITION FOR HEAT SEALS AND CONTAINER WITH SAME 审中-公开
    用于热密封和容器的柔性膜组合物

    公开(公告)号：US20160244229A1

    公开(公告)日：2016-08-25

    申请号：US15027879

    申请日：2014-10-10

    Applicant: Dow Global Technologies LLC

    Inventor： Chuan Yar Lai ,  Kurt Brunner ,  Jozef J.i. Van Dun ,  Nicolas C. Mazzola ,  Maria Isabel Arroyo Villan

    IPC: B65D65/02 ,  B32B7/02 ,  B32B27/06 ,  B32B7/12 ,  B32B27/32 ,  B32B27/34 ,  B32B27/36 ,  B32B27/08 ,  B32B27/30

    CPC classification number: B65D65/02 ,  B32B7/02 ,  B32B7/12 ,  B32B27/065 ,  B32B27/08 ,  B32B27/304 ,  B32B27/306 ,  B32B27/32 ,  B32B27/325 ,  B32B27/327 ,  B32B27/34 ,  B32B27/36 ,  B32B2270/00 ,  B32B2274/00 ,  B32B2307/31 ,  B32B2307/582 ,  B32B2307/72 ,  B32B2439/46

    Abstract: The present disclosure is directed to compositions and film structures suitable for heat seal production. The heat sealable flexible film structure includes: a layer (A) comprising a blend comprising from 35 to 80 percent by weight of the layer (A) of a propylene based plastomer or elastomer (“PBPE”) and from 20 to 65 percent by weight of the layer (A) of a low density polyethylene having a density in the range of from 0.915 g/cm3 to 0.935 g/cm3, wherein the blend has a melt index (as determined according to ASTM D 1238 (at 190° C./2.16 Kg); a layer (B), adjacent to layer (A), comprising a polyolefin-based polymer, wherein the polymer or polymer blend which makes up layer (B) flows more easily than the blend of layer (A) under conditions intended for making a hard seal with the film structure; and an outermost layer (C) comprising a material having a melting point greater than 140° C.; wherein the ratio of the thickness of layer (B) to the thickness of layer (A) is 3:1 or greater. The heat sealable flexible film structure is used to make a flexible container having one or more heat seals. The heat seal can be a frangible heat seal, a hard heat seal, or a combination of frangible heat seals and hard heat seals depending on the sealing conditions.

    Abstract translation: 本公开涉及适于热封生产的组合物和膜结构。 可热封的柔性膜结构包括：包含共混物的层（A），其包含35至80重量％的基于丙烯的塑性体或弹性体（“PBPE”）的层（A）和20至65重量％ 的密度为0.915g / cm 3至0.935g / cm 3的低密度聚乙烯层（A），其中该共混物具有熔体指数（根据ASTM D 1238（在190℃下测定） （B）与层（A）相邻的层（B），其包含聚烯烃基聚合物，其中构成层（B）的聚合物或聚合物共混物比下面的层（A）的共混物更容易流动 用于与膜结构进行硬密封的条件;以及包含熔点大于140℃的材料的最外层（C）;其中层（B）的厚度与层的厚度（ A）为3:1或更大。可热封的柔性膜结构用于制造具有一个或多个热量的柔性容器 根据密封条件，热封可以是易碎热封，硬热密封或易碎热封和硬热密封的组合。

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