Massachusetts Institute of Technology

The Dow Chemical Company

Mg Generon

Philip E Alei

Nam Pyo Suh

Daniel O Clark

John A Jensvold

David P Flores

Frederick L Coan

Glen Stevick

Ward Evan TeGrotenhuis

Jeff C Schletz

Wickham Allen

Karen L Skala

Harold V Wait, Jr

Rong Yuan

Devices for insulating the electrical terminals of cylindrical batteries, such as lithium-ion cells, to prevent the occurrence of shorting. One configuration is a device or apparatus which covers one or more terminals of the cell, thereby providing an insulative barrier, while still allowing the cell to be used. Another configuration is a cell covering partially covering the topmost portions of the negatively charged exterior cell case, closest to the positive terminal of the cell, and attaching the covering via a circumferential appendage which locks onto the cell. In another configuration the cell covering extends axially down the side of the cell case to cover part of, or the entirety of, the side of the negatively charged case.

End cap for battery or cylindrical rechargeable cell

Hollow fiber membrane modules are manufactured by weaving hollow fiber membranes into a web while the fibers still contain a residual amount of the organic liquids used in the extrusion of the fibers. The web once formed is then passed through a final solvent extraction stage, followed by drying and heating to fix the final form and permeation characteristics of the membranes, and finally rolling the web into a bundle which forms the interior of the module. The hollow fibers are woven as fill in the web.

Loom processing of hollow fiber membranes

A method for bonding homopolymers or copolymers of vinylidene chloride to polyamides which method comprises blending the polymer or copolymer with low density polyethylene, high density polyethylene, linear low density polyethylene, homopolymer or copolymer of propylene, or a copolymer of ethylene and acrylic acid, methacrylic acid and a small amount of copolymer of ethylene and a lower alkyl or hydroxyalkyl ester of acrylic or methacrylic acid and then contacting the blend of polymers with the polyamide under heat and pressure. Unexpected adhesion between the Saran blend and the polyamide was found.

Method for improving the bond strength of Saran polymers to polyamides

A novel and improved ultra tough polymer plastic material wherein a first polymer portion of the material has substantially non-oriented molecules forming a matrix within which there is a second polymer portion of the material having substantially oriented molecules, the first and second portions forming substantially continuous interface regions therebetween in which the first and second portions are highly diffused with each other. In a particular novel process for forming such material, one or more fibers of the material are formed and the molecules thereof are selectively oriented, the fibers are then processed to increase the thermal stability of the selectively oriented molecules so as to maintain the selected orientation thereof and a selected arrangement of the processed fibers are molded at a selected temperature and pressure, the pressure being maintained throughout the heating and cooling step of the molding process to prevent any change in the selective orientation of the molecules. The molded part then has high stength and a high degree of toughness.

Ultra tough plastic material

Growing community of inventors

Carlsbad, CA, United States of America

Philip E Alei