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    • 2. 发明申请
    • STRETCH-SLEEVE FILM
    • 拉伸膜片
    • WO2014172350A1
    • 2014-10-23
    • PCT/US2014/034160
    • 2014-04-15
    • DOW GLOBAL TECHNOLOGIES LLCPETROPLASTVINORA AG
    • BRUNNER, KurtFORSTER, Hans JörgGALATIK, Thomas
    • B32B27/32
    • B32B1/08B29C55/24B29C63/18B29L2009/00B32B1/02B32B27/08B32B27/32B32B33/00B32B2270/00B32B2307/54B32B2307/72B32B2323/046B32B2439/00
    • 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 μιη, preferably 35 to 60 μιη and especially 40 to 55 and an elastic restoring capacity of more than 95% at an elonga¬ tion 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 lay¬ ers 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 copol¬ ymer (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%.
    • 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。 %,优选为80〜99重量%,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至70μm,优选为35至60μm, 特别是40〜55,伸长率为55%时的弹性恢复能力大于95%。 本发明还涉及制作薄膜的方法,使用这种财富。 作为拉伸套筒膜和具有本发明的油的制品,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。 拉伸套筒薄膜包括至少三层,包括两层表层和一层芯层。 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。 拉伸套管膜在55%拉伸时的弹性回复率至少为95%。
    • 3. 发明申请
    • FLEXIBLE FILM COMPOSITION FOR HEAT SEALS AND CONTAINER WITH SAME
    • 用于热密封和容器的柔性膜组合物
    • WO2015057501A1
    • 2015-04-23
    • PCT/US2014/059996
    • 2014-10-10
    • DOW GLOBAL TECHNOLOGIES LLC
    • LAI, Chuan YarBRUNNER, KurtVAN DUN, Jozef J.I.MAZZOLA, Nicolas C.ARROYO VILLAN, Maria Isabel
    • B32B27/08B32B27/32B32B27/34B32B27/36B32B27/40
    • B65D65/02B32B7/02B32B7/12B32B27/065B32B27/08B32B27/304B32B27/306B32B27/32B32B27/325B32B27/327B32B27/34B32B27/36B32B2270/00B32B2274/00B32B2307/31B32B2307/582B32B2307/72B32B2439/46
    • 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/cm 3 to 0.935 g/cm 3 , 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.
    • 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),其包含基于丙烯的塑性体或弹性体(“PBPE”)的层(A)的35至80重量%和20至65重量% 的密度在0.915g / cm 3至0.935g / cm 3范围内的低密度聚乙烯层(A),其中该共混物具有熔体指数(根据ASTM D 1238测定(190℃/ 2.16Kg);与层(A)相邻的层(B),其包含聚烯烃基聚合物,其中组成层(B)的聚合物或聚合物共混物比条件(A)的共混物更容易流动 用于与薄膜结构进行硬密封;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(A)的厚度的比率 是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封的柔性容器 根据密封条件,热封可以是易碎热封,硬热密封或易碎热密封和硬热密封的组合。