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    MULTILAYER FILMS AND ARTICLES COMPRISING MULTILAYER FILMS
    3.
    发明申请
    MULTILAYER FILMS AND ARTICLES COMPRISING MULTILAYER FILMS 审中-公开

    公开(公告)号：WO2021021354A1

    公开(公告)日：2021-02-04

    申请号：PCT/US2020/040056

    申请日：2020-06-29

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： ALABOSON, Justice ,  KALIHARI, Vivek

    IPC: B32B7/02 ,  B32B27/18 ,  B32B27/28 ,  B32B27/32 ,  B65D77/06 ,  C08L23/06 ,  C08L83/04

    Abstract: Embodiments of the present invention relate to multilayer films, bags, and other articles. In one aspect, a multilayer film comprises a first skin layer having an overall density of less than or equal to 0.912 g/cm 3 ; a second skin layer having an overall density of less than or equal to 0.912 g/cm 3 ; and a core positioned between the skin layers, wherein the core has an overall density that is at least 0.01 g/cm 3 greater than then overall density of the first skin layer, wherein the overall density of the multilayer film is from 0.905 to 0.930 g/cm 3 , wherein the film has a bending stiffness of 1.35 mN·mm or less when the film has a thickness of 2 mils (50.8 microns), wherein the film exhibits a Gelbo flex crack performance of 2 pinholes or less in 20,000 cycles, and wherein the film comprises at least 95% by weight polyethylene based on the total weight of the film.

    POLYOLEFIN BASED STRETCHED FILMS INCORPORATING MECHANOCHROMIC DYES AND METHOD TO USE SAME
    4.
    发明申请
    POLYOLEFIN BASED STRETCHED FILMS INCORPORATING MECHANOCHROMIC DYES AND METHOD TO USE SAME 审中-公开
    含有机械变色染料的聚烯烃基拉伸膜及其使用方法

    公开(公告)号：WO2018064155A1

    公开(公告)日：2018-04-05

    申请号：PCT/US2017/053697

    申请日：2017-09-27

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： ALABOSON, Justice ,  SHAH, Viraj ,  HOBSON, Jon W. ,  SERRAT, Cristina

    IPC: B32B27/08 ,  B32B27/32 ,  C08J5/18 ,  B32B7/12 ,  B32B27/30 ,  B32B27/34 ,  C08K5/00

    Abstract: The present disclosure relates to a multilayer stretch film comprising at least a first layer, wherein said first layer comprises a polyolefin resin. The film of this aspect of the disclosure further include at least a second layer, and a mechanochromic dye which may be in any or all layers of the film. Another aspect of the disclosure is a method of promoting optimal stretching of stretch film during a wrapping operation, which method comprises at least the following steps. A polyolefin resin is selected that has a given density. Selecting a mechanochromic dye based on its ability to agglomerate in an unstretched film made from the polyolefin resin having the given density, such that when the dye is included in the film, the unstretched film will exhibit a first color. Admixing the mechanochromic dye into a melt of the polyolefin resin. Forming a film from the admixture of the previous step. Wrapping an object using the film of the previous step, while stretching the film to a level where a change from the first color to a second color can be observed.

    Abstract translation: 本公开涉及包含至少第一层的多层拉伸膜，其中所述第一层包含聚烯烃树脂。 本公开内容的该方面的膜进一步包括至少第二层和可以在膜的任何或全部层中的机械变色染料。 本公开的另一方面是促进包裹操作期间拉伸膜的最佳拉伸的方法，该方法至少包括以下步骤。 选择具有给定密度的聚烯烃树脂。 基于其在由具有给定密度的聚烯烃树脂制成的未拉伸膜中聚集的能力选择机械变色染料，使得当包含染料时，未拉伸膜将呈现第一颜色。 将机械变色染料混入聚烯烃树脂的熔体中。 由前一步骤的混合物形成薄膜。 使用上一步的胶片包装物体，同时将胶片拉伸到可以观察到从第一种颜色变为第二种颜色的水平。

    ORIENTED POLYETHYLENE FILMS AND ARTICLES COMPRISING THE SAME
    5.
    发明申请
    ORIENTED POLYETHYLENE FILMS AND ARTICLES COMPRISING THE SAME 审中-公开

    公开(公告)号：WO2021242384A1

    公开(公告)日：2021-12-02

    申请号：PCT/US2021/024140

    申请日：2021-03-25

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： WANG, Jian ,  HAUSMANN, Karlheinz ,  BISWAS, Sanjib ,  GLAD, Brayden E. ,  GINGER, Douglas S. ,  ALABOSON, Justice ,  WEVERS, Ronald

    IPC: B32B27/08 ,  B32B27/30 ,  B32B27/32 ,  B32B27/34 ,  C08J5/18 ,  C08L23/08

    Abstract: The present invention relates to oriented, multilayer polyethylene films. In one aspect, a biaxially oriented, multilayer polyethylene film comprises at least one layer comprising: (1) a polyethylene-based composition that comprises: (a) at least 97% by weight, based on the total weight of the polyethylene-based composition, of a polyethylene composition comprising: (i) from 25 to 37 percent by weight of a first polyethylene fraction having a density in the range of 0.935 to 0.947 g/cm3 and a melt index (I2) of less than 0.1 g/10 minutes; and (ii) from 63 to 75 percent by weight of a second polyethylene fraction; wherein the polyethylene composition has less than 0.10 branches per 1,000 carbon atoms when measured using 13C NMR, wherein the density of the polyethylene-based composition is at least 0.965 g/cm3, and wherein the melt index (I2) of the polyethylene-based composition is 0.5 to 10 g/10 minutes.

    A METHOD TO ADJUST THE ELONGATION REQUIRED TO EFFECT A COLOR CHANGE IN POLYMERIC STRETCH FILMS INCORPORATING MECHANOCHROMIC DYES
    6.
    发明申请
    A METHOD TO ADJUST THE ELONGATION REQUIRED TO EFFECT A COLOR CHANGE IN POLYMERIC STRETCH FILMS INCORPORATING MECHANOCHROMIC DYES 审中-公开

    公开(公告)号：WO2019190749A1

    公开(公告)日：2019-10-03

    申请号：PCT/US2019/022042

    申请日：2019-03-13

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： ALABOSON, Justice

    IPC: B32B7/08 ,  B32B27/32 ,  B32B27/18

    Abstract: The present disclosure relates a method to adjust the amount of elongation required to effect a color change in a polymer stretch film. A first aspect of the invention is a method which method comprises selecting a polyolefin resin having a given density; admixing a given amount of the AIE mechanochromic dye into a melt of the polyolefin resin; making a film of a desired thickness from the polyolefin resin containing the mechanochromic dye; determining the level of elongation needed to effect a color change in the resulting film; and adjusting the density of the polyolefin resin to change the level of elongation needed to effect the color change to the desired level.

    METHODS OF MAKING FILMS HAVING TARGET BETA RATIOS AND TARGET PERMEABILITIES
    10.
    发明申请
    METHODS OF MAKING FILMS HAVING TARGET BETA RATIOS AND TARGET PERMEABILITIES 审中-公开

    公开(公告)号：WO2020190948A1

    公开(公告)日：2020-09-24

    申请号：PCT/US2020/023161

    申请日：2020-03-17

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： ALABOSON, Justice ,  MARTIN, Jill M.

    IPC: C08J5/18 ,  B32B27/20 ,  B32B27/32 ,  C08K3/40 ,  C08L23/08

    Abstract: The present invention provides methods of making films and methods of making packages. In one aspect, a method of making a film having a beta ratio and a permeability comprises: (a) selecting a polyolefin, the polyolefin comprising low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, polyolefin elastomer, polyolefin plastomer, or a combination thereof; (b) identifying a target beta ratio and a target oxygen permeability for the film; (c) selecting one or more additives based on the target beta ratio, the one or more additives comprising calcium carbonate, carbon black, ethylene vinyl acetate, or a combination thereof; (d) determining an amount of the selected additive(s) based on the target beta ratio and the target oxygen permeability; and (e) forming a film comprising the polyolefin and the selected additive(s), wherein the film has the target beta ratio and the target oxygen permeability.

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