公开(公告)号：US20160177473A1

公开(公告)日：2016-06-23

申请号：US14905869

申请日：2014-09-19

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： Mark A. Spalding ,  Weijun Wang ,  Calvin L. Pavlicek ,  Nicholas J. Horstman

IPC: D01F6/30 ,  D01D5/098 ,  B29C47/00

CPC classification number: D01F6/30 ,  B29C48/0018 ,  B29C48/022 ,  B29C48/05 ,  B29K2023/00 ,  B29L2031/707 ,  D01D5/098 ,  D01D5/16 ,  D01F9/21 ,  D01F11/06 ,  D06M11/52 ,  D06M11/55

Abstract: Prepare a polyolefin fiber having a diameter of 10 microns or less by extruding a molten polyolefin through die holes having diameters in a range of 250 to 500 microns to produce molten polyolefin fibers; drawing the molten polyolefin fibers to achieve a molten draw ratio in a range of 150 to 500 at a temperature in a range of 200 to 250 degrees Celsius; and drawing the polyolefin fibers in a solid state to achieve a solid state draw ratio of 3.0 to 4.0 at a temperature in a range of 40 to 100 degrees Celsius to produce polyolefin fibers having a diameters of 10 microns or less; where the polyolefin is characterized by being a polyolefin copolymer of ethylene and one or more than one alpha-olefin and where the copolymer has a solid density of 0.870 or more and 0.96 or less as determined according to ASTM D792.

Abstract translation: 通过将熔融聚烯烃挤出直径在250-500微米范围内的模具孔，制备直径为10微米或更小的聚烯烃纤维，以制备熔融聚烯烃纤维; 拉伸熔融的聚烯烃纤维以在200至250摄氏度的温度范围内实现150至500的范围内的熔融拉伸比; 并且将聚烯烃纤维拉伸成固态，以在40至100摄氏度的温度下实现3.0至4.0的固态拉伸比，以制备直径为10微米或更小的聚烯烃纤维; 其中聚烯烃的特征在于是乙烯和一种或多于一种α-烯烃的聚烯烃共聚物，其中根据ASTM D792测定，共聚物的固体密度为0.870以上且0.96以下。

公开(公告)号：US09481143B2

公开(公告)日：2016-11-01

申请号：US14057717

申请日：2013-10-18

Applicant: Dow Global Technologies LLC

Inventor： Joseph Dooley ,  Jeffrey M. Robacki ,  Mark A. Barger ,  Robert E. Wrisley ,  Sam L. Crabtree ,  Calvin L. Pavlicek

IPC: B32B1/08 ,  B29C47/00 ,  B29C47/06 ,  B29C47/26 ,  B29C47/70 ,  B29C55/28 ,  B32B37/00 ,  B29C47/56 ,  B32B5/18 ,  B32B5/22 ,  B32B5/32 ,  B32B27/06 ,  B32B27/08 ,  B32B27/18 ,  B32B27/20 ,  B32B27/30 ,  B32B27/32 ,  B32B27/34 ,  B32B27/36 ,  B32B27/40 ,  B32B3/06 ,  B32B3/26 ,  B32B3/28 ,  B29C47/28 ,  B29C49/04 ,  B29C49/22 ,  B29L23/00 ,  B32B37/15

CPC classification number: B32B1/08 ,  B29C47/0023 ,  B29C47/0026 ,  B29C47/003 ,  B29C47/0054 ,  B29C47/0057 ,  B29C47/061 ,  B29C47/062 ,  B29C47/065 ,  B29C47/067 ,  B29C47/26 ,  B29C47/263 ,  B29C47/28 ,  B29C47/56 ,  B29C47/707 ,  B29C49/04 ,  B29C49/22 ,  B29C55/28 ,  B29L2023/001 ,  B32B3/06 ,  B32B3/263 ,  B32B3/28 ,  B32B5/18 ,  B32B5/22 ,  B32B5/32 ,  B32B27/065 ,  B32B27/08 ,  B32B27/18 ,  B32B27/20 ,  B32B27/302 ,  B32B27/304 ,  B32B27/306 ,  B32B27/308 ,  B32B27/32 ,  B32B27/325 ,  B32B27/34 ,  B32B27/36 ,  B32B27/365 ,  B32B27/40 ,  B32B37/00 ,  B32B37/153 ,  B32B2266/0214 ,  B32B2270/00 ,  B32B2272/00 ,  B32B2307/50 ,  B32B2307/518 ,  B32B2307/546 ,  B32B2307/558 ,  B32B2307/5825 ,  B32B2307/72 ,  B32B2307/7242 ,  B32B2307/7265 ,  B32B2439/70 ,  B32B2439/80 ,  B32B2597/00 ,  Y10T428/1352 ,  Y10T428/1393

Abstract: Disclosed are multilayer film structures having annular profiles, and methods and apparatus of making the structures disclosed. The annular multilayer articles have a uniform thickness, at least four layers and comprise overlapped and non-overlapped circumferential areas; wherein the layer structure of the non-overlapped area is doubled in the overlapped layer. A method of making the structure includes providing a multilayer flow stream with at least four layers of thermoplastic resinous materials; feeding the multilayer flow stream to a distribution manifold of an annular die to form an annular multilayer flow stream; and removing the annular multilayer flow stream from the annular die to form the annular multilayer structure. Also disclosed is an apparatus, comprising: a feedblock, with optional layer multiplier, that provides a multilayer flow stream of at least four layers to the manifold of an annular die; and an annular die having at least one distribution manifold that extrudes a multilayer flow stream.

Abstract translation: 公开了具有环形轮廓的多层膜结构以及制造所述结构的方法和装置。 环形多层制品具有均匀的厚度，至少四层，并且包括重叠和非重叠的圆周区域; 其中非重叠区域的层结构在重叠层中加倍。 制造该结构的方法包括提供具有至少四层热塑性树脂材料的多层流动流; 将多层流动流供给到环形模头的分配歧管以形成环形多层流动流; 以及从所述环形模具移除所述环形多层流动流以形成所述环形多层结构。 还公开了一种装置，包括：具有任选的层乘法器的进料块，其向环形模头的歧管提供至少四层的多层流动流; 以及具有至少一个挤出多层流动流的分配歧管的环形模头。