Disclosed is a preparation method for modified polypropylene, comprising the following steps: dissolving polypropylene in a solvent; and adding a Lewis acid and an initiator into the solution in which the polypropylene is dissolved, and then performing a grafting reaction, to obtain the modified…

Described herein is a multilayer microporous film or membrane that may exhibit improved properties, including improved dielectric break down and strength, compared to prior monolayer or tri-layer microporous membranes of the same thickness. The preferred multilayer microporous membrane comprises…

This disclosure relates to a film for a tire inner liner including a base film layer including a copolymer or a mixture of 50 wt% to 95 wt% of a polyamide-based resin and 5 wt% to 50 wt% of a polyether-based resin, and an adhesive layer including a resorcinol-formalin-latex(RFL)-based adhesive…

This disclosure relates to a film for a tire inner liner including a base film layer that has 3 glass transition temperature peaks and an adhesive layer including a resorcinol-formalin-latex(RFL)-based adhesive, and a method for manufacturing the film for a tire inner liner.

A polyolefin microporous membrane, the membrane having, when measured by DSC, a degree of crystallinity of from 65 to 85%, a lamellar crystal/crystal ratio of from 30 to 85%, a crystal length of From 5 nm to 50 nm and an amorphous length of from 3 nm to 30 nm, and a polyolefin microporous membrane…

An electrochemical cell comprising: a. a positive electrode including: i. a current collector (12) sheet having a pair of opposite surfaces and a pair of opposite edges (13,15); ii. a layer of positive electrode material (14) disposed on each surface of the current collector sheet; b. a polymer…

In a method of producing a pneumatic tire comprising a belt comprised of at least two belt layers each constituted with steel cords and a coating rubber covering the cord between a tread and a radial carcass by spirally winding a band-shaped uncured rubber composition extruded through an extruder…

A polymer battery module (2) provided with tabs (4) is put in a package (5) and an open end part of the package (5) is heat-sealed by a heat-sealing machine (10). The heat-sealing machine (10) is provided with a pair of sealing heads (10a, 10b) respectively having sealing surfaces (12). The sealing…