Dow Brands Inc.

The Dow Chemical Company

Bertha R Vaughn

Brian C Dais

Jose Porchia

John O McCree

Raymond R Rydman

John M Kernstock

Earl H Johnson

Disclosed is a zipper for a reclosable thermoplastic bag having opposing rib and groove profiles wherein at least one of the opposing zipper profiles has an longitudinally extending part interlockable and substantially free of interdigitation with the opposing profile and wherein the part is structurally discontinuous along its length. When the rib and groove profiles are interlocked, an audible clicking sound and/or a vibratory or bumpy feel perceptible to the touch is imparted. Further disclosed is a process and apparatus for making the zipper wherein a zipper profile is extruded and indentions are formed within and along it.

Apparatus for making a zipper for a reclosable thermoplastic bag

Method of making a zipper for reclosable thermoplastic bag

Zipper for a reclosable thermoplastic bag and a process and apparatus

Aqueous compositions containing a water-soluble amphoteric surfactant are effectively thickened without substantial loss in clarity by a suitable pH responsive, synthetic addition copolymeric thickener such as a copolymer of an .alpha., .beta.-ethylenically unsaturated carboxylic acid (e.g., methacrylic acid), a nonionic chain extender of an .alpha., .beta.-ethylenically unsaturated monomer (e.g., ethyl acrylate), and a nonionic vinyl surfactant ester (e.g., nonylphenoxy(polyethyleneoxy)ethyl methacrylate). Due to the ability of the copolymeric thickener to increase the viscosity of the amphoteric surfactant composition without substantially reducing the clarity thereof, the resulting thickened compositions are useful as shampoos, cleaning compounds and the like.

Thickened amphoteric surfactant solutions

Growing community of inventors

Midland, MI, United States of America

Bertha R Vaughn