公开(公告)号：WO1994007677A1

公开(公告)日：1994-04-14

申请号：PCT/US1993008464

申请日：1993-09-08

Applicant: THE DOW CHEMICAL COMPANY

Inventor： THE DOW CHEMICAL COMPANY ,  RAMANATHAN, Ravi ,  SCHRENK, Walter, J. ,  WHEATLEY, John, A.

IPC: B29C47/06

CPC classification number: B29C47/56 ,  B29C47/0019 ,  B29C47/0021 ,  B29C47/003 ,  B29C47/065 ,  B29C47/145 ,  B29C47/707 ,  B29L2007/002 ,  B29L2007/008 ,  B29L2009/00

Abstract: A process and apparatus for the coextrusion of a multilayer polymeric body is provided which incorporates protective boundary layers into the body, protecting the layers from instability and breakup during layer formation and multiplication. The process includes the steps of providing at least first (11) and second (12) streams of heat plastified extrudable thermoplastic material which are combined to form a composite stream having the first substreams and second substreams interdigitated. A third stream (24) of heat plastified thermoplastic material is supplied to the exterior surfaces of the composite stream to form protective boundary layers adjacent the walls of the coextrusion apparatus through which the heat plastified polymer streams pass. Layer instability and breakup are avoided using process conditions which would otherwise adversely affect the optical and/or mechanical properties of the articles which are formed.

Abstract translation: 提供了一种用于共挤出多层聚合物体的方法和装置，其将保护性边界层结合到体内，从而在层形成和增殖期间保护层免于不稳定和破裂。 该方法包括提供至少第一（11）和第二（12）热量塑化可挤出热塑性材料流的步骤，其被组合以形成具有交错指示的第一子流和第二子流的复合流。 将热塑化热塑性材料的第三流（24）供应到复合流的外表面，以形成邻近共挤出设备的壁的保护边界层，热塑化聚合物流通过该壁。 使用过程条件避免了层不稳定性和破裂，否则会对形成的制品的光学和/或机械性能产生不利影响。

公开(公告)号：WO1994028446A1

公开(公告)日：1994-12-08

申请号：PCT/US1994005793

申请日：1994-05-23

Applicant: THE DOW CHEMICAL COMPANY

Inventor： THE DOW CHEMICAL COMPANY ,  ARENDS, Charles, B. ,  SCHRENK, Walter, J. ,  LEWIS, Ray, A. ,  RAMANATHAN, Ravi ,  WHEATLEY, John

IPC: G02B05/28

CPC classification number: B32B17/10018 ,  G02B5/282 ,  Y10S428/913 ,  Y10S428/918 ,  Y10T428/24975 ,  Y10T428/31507 ,  Y10T428/31649 ,  Y10T428/31935

Abstract: The present invention provides a two-component infrared reflecting film which reflects light in the infrared region of the spectrum while suppressing second, third and fourth order reflections in the visible spectrum. The film comprises alternating layers of first (A) and second (B) diverse polymeric materials having a six layer alternating repeat unit with relative optical thicknesses of .778A.111B.111A.778B.111A.111B. The polymeric materials differ from each other in refractive index by at least 0.03.

Abstract translation: 本发明提供一种双光谱反射膜，其在光谱的红外区域中反射光，同时抑制可见光谱中的第二，第三和第四次反射。 该膜包括具有六层交替重复单元的相对光学厚度为.778A.111B.111A.778B.111A.111B的第一（A）和第二（B）多种聚合材料的交替层。 聚合物材料的折射率彼此不同，至少为0.03。

公开(公告)号：EP1117932A1

公开(公告)日：2001-07-25

申请号：EP99970152.7

申请日：1999-09-17

Applicant: THE DOW CHEMICAL COMPANY

Inventor： RAMANATHAN, Ravi ,  WRISLEY, Robert, E. ,  PARSONS, Tom, J. ,  HYUN, Kun, S.

IPC: F04C2/08 ,  F04C13/00 ,  F04C2/18

CPC classification number: F04C13/002 ,  F04C2/086

Abstract: A gear pump exhibiting improved efficiency over a broader range of fluid viscosity and pump speed includes a compression zone defined between each of a pair of pump gears and internal walls of a gear chamber, wherein the compression zones have a non-uniform thickness along a longitudinal direction of the gears. The geometry of the compression zones provides a mechanism whereby the drag of the viscous fluid which is induced by the rotation of the pump gears carries the viscous fluid through a progressively narrower gap in the direction of rotation ending in a final smooth pinch-off at the start of the seal zone. The geometry of the compression zone maximizes the drag and pressurization of the viscous fluid being pumped into the teeth of the gears, thereby assisting in the complete filling of the teeth. The result is improved fill efficiency over a broader range of pump speeds and over a broader range of fluid viscosity.

公开(公告)号：EP0663867A1

公开(公告)日：1995-07-26

申请号：EP93920499.0

申请日：1993-09-08

Applicant: THE DOW CHEMICAL COMPANY

Inventor： RAMANATHAN, Ravi ,  SCHRENK, Walter, J. ,  WHEATLEY, John, A.

IPC: B32B7 ,  B29C47 ,  B29K33 ,  B29K69

CPC classification number: B29C47/56 ,  B29C47/0019 ,  B29C47/0021 ,  B29C47/003 ,  B29C47/065 ,  B29C47/145 ,  B29C47/707 ,  B29L2007/002 ,  B29L2007/008 ,  B29L2009/00

Abstract: A process and apparatus for the coextrusion of a multilayer polymeric body is provided which incorporates protective boundary layers into the body, protecting the layers from instability and breakup during layer formation and multiplication. The process includes the steps of providing at least first (11) and second (12) streams of heat plastified extrudable thermoplastic material which are combined to form a composite stream having the first substreams and second substreams interdigitated. A third stream (24) of heat plastified thermoplastic material is supplied to the exterior surfaces of the composite stream to form protective boundary layers adjacent the walls of the coextrusion apparatus through which the heat plastified polymer streams pass. Layer instability and breakup are avoided using process conditions which would otherwise adversely affect the optical and/or mechanical properties of the articles which are formed.

公开(公告)号：EP0949996A2

公开(公告)日：1999-10-20

申请号：EP97954623.0

申请日：1997-12-22

Applicant: THE DOW CHEMICAL COMPANY

Inventor： SCHOMAKER, Joseph, A. ,  WHITE, Jerry, E. ,  RAMANATHAN, Ravi ,  HEADLEY, David, L. ,  BROWN, Charles, N. ,  BENSASON, Selim ,  BALES, Stephen, E.

IPC: B65D65 ,  B32B1 ,  B32B27 ,  F16L9 ,  F16L11

CPC classification number: B32B1/08 ,  B32B7/12 ,  B32B27/08 ,  B32B27/285 ,  B32B27/32 ,  B32B27/36 ,  B32B27/365 ,  B32B2323/043 ,  B32B2367/00 ,  B32B2369/00 ,  B32B2371/00 ,  B32B2439/00

Abstract: A multilayer laminate structure comprising (A) one or more layers of a polyolefin or a blend of two or more different polyolefins; and (B) one or more layers of a fuel barrier polymer or blends thereof, the fuel barrier polymer or blends thereof having a Fuel CM15 permeability of 45 g-mil/m2-day or less, based on a layer thickness of 1 mil, when measured at 40 °C and under ambient pressure conditions of 700 to 760 torr; and optionally (C) a tie layer interposed between a polyolefin layer and an adjacent fuel barrier layer; and/or optionally (D) a regrind layer interposed between a tie layer and a polyolefin layer.

Abstract translation: 一种多层层压结构，其包含（A）一层或多层聚烯烃或两种或多种不同聚烯烃的共混物; 和（B）一层或多层燃料阻挡聚合物或其混合物，基于1密耳的层厚，燃料阻挡聚合物或其共混物具有45克 - 密耳/平方米 - 天或更少的燃料CM15渗透率， 当在40℃和700-760托的环境压力条件下测量时; （C）夹在聚烯烃层和相邻的燃料阻挡层之间的连接层; 和/或任选地（D）介于连接层和聚烯烃层之间的再研磨层。