1
Shih Yaw Lai, John R Wilson, George W Knight, James C Stevens, Pak Wing S Chum: Elastic substantially linear olefin polymers. The Dow Chemical Company, Stephen P Krupp, L Wayne White, December 21, 1993: US05272236 (945 worldwide citation)

Substantially linear olefin polymers having a melt flow ratio, I.sub.10 /I.sub.2, .gtoreq.5.63, a molecular weight distribution, M.sub.w /M.sub.n, defined by the equation: M.sub.w /M.sub.n .ltoreq.(I.sub.10 /I.sub.2)-4.63, and a critical shear stress at onset of gross melt fracture of greater than a ...


2
Pak Wing S Chum, Kaelyn C Koch: Multilayer polyolefinic film structures having improved heat seal characteristics. The Dow Chemical Company, February 18, 1992: US05089321 (81 worldwide citation)

Multilayer thermoplastic film structures comprising at least one heat-sealable outer layer (A) and at least one core layer (B) are disclosed. Layer (A) has improved heat sealability after irradiation (e.g. electron beam). Layer (B) has improved shrinkage after irradiation. Layer (A) is a linear poly ...


3
Luc Bosiers, Jacquelyn A deGroot, Lawrence T Kale, Pak Wing S Chum: Multilayer polyolefin with balanced sealant properties. The Dow Chemical Company, February 23, 1999: US05874139 (56 worldwide citation)

The subject invention generally provides a multilayer structure that includes a polymer mixture made from at least two polymer component materials. The invention particularly pertains to a multilayer structure containing an improved sealant layer and a polypropylene layer, wherein the sealant layer ...


4
Pak Wing S Chum, Nicole F Whiteman: Method of packaging food products. The Dow Chemical Company, June 27, 1995: US05427807 (52 worldwide citation)

Food products, especially fresh food products such as retail-cut red meat, vegetables and fruits, are packaged with a film having at least one film layer comprising a substantially linear ethylene polymer, preferably a polymer comprising ethylene and at least one .alpha.-olefin comonomer, e.g. 1-oct ...


5
Kim L Walton, Rajen M Patel, Pak Wing S Chum, Todd J Obijeski: Packaging and wrapping film. The Dow Chemical Company, October 8, 1996: US05562958 (46 worldwide citation)

Biaxially oriented, heat-shrinkable film-making process and film with improved toughness and extrusion processibility are disclosed. The improved film comprises at least one layer of at least one substantially linear ethylene homopolymer or interpolymer, wherein the substantially linear ethylene pol ...


6
Chung P Park, Pak Wing S Chum, George W Knight: Cross-linked ethylenic polymer foam structures and process for making. The Dow Chemical Company, J Robert Dean Jr, February 22, 1994: US05288762 (41 worldwide citation)

Disclosed is a cross-linked ethylenic polymer foam structure of an ethylenic polymer material of a cross-linked, substantially linear ethylenic polymer. The substantially linear ethylenic polymer having in an uncross-linked state has: a) a melt flow ratio, I.sub.10 /I.sub.2, .gtoreq.5.63; b) a molec ...


7
Chung P Park, Pak Wing S Chum, George W Knight: Cross-linked ethylenic polymer foam structures and process for making. The Dow Chemical Company, J Robert Dean Jr, April 18, 1995: US05407965 (37 worldwide citation)

Disclosed is a cross-linked ethylenic polymer foam structure of an ethylenic polymer material of a cross-linked, substantially linear ethylenic polymer. The substantially linear ethylenic polymer having in an uncross-linked state has: a) a melt flow ratio, I.sub.10 /I.sub.2, .gtoreq.5.63; b) a molec ...


8
Deepak R Parikh, Pak Wing S Chum, Rajen M Patel, Klye G Kummer, Pradeep Jain, Thomas J McKeand Jr, Ronald P Markovich, Timothy E Clayfield, Wasif Ahmed Khan: Polyolefin elastomer blends exhibiting improved properties. The Dow Chemical Company, December 21, 1999: US06005053 (35 worldwide citation)

Polymer mixtures are disclosed which comprise at least one homogeneously branched ethylene polymer (A) and at least one ethylene polymer (B) having a crystallinity which is at least 7% greater than the crystallinity of polymer (A) with certain provisos. A process for making a molded article using th ...


9
Thomas T Allgeuer, Selim Bensason, Pak Wing S Chum, Jacquelyne A Degroot, Robert H Kelch, Wenbin Liang, Antonio Torres, Werner Wagner: Fringed surface structures obtainable in a compression molding process. O Keefe Egan & Peterman, September 20, 2005: US06946182 (35 worldwide citation)

Disclosed are mono-layer or multi-layer films, sheets, or coatings wherein at least on layer comprises a fringed surface microstructure (1), a process for making these items and uses thereof. Further disclosed are articles of manufacture comprising such film, sheet, or coating.


10
Lee Spencer, Brian W S Kolthammer, Miriam P Ripplinger, Jeffrey J Wooster, Pak Wing S Chum, Jacquelyn A deGroot: Silica supported transition metal catalyst. The Dow Chemical Company, July 27, 1993: US05231151 (35 worldwide citation)

A transition metal containing catalyst useful for the polymerization of .alpha.-olefins is prepared by (A) forming in an inert atmosphere which excludes oxygen and moisture a slurry of (1) a porous inorganic oxide support material selected from the group consisting of silica, alumina, or a combinati ...