초록 ▼

A high temperature filter material, comprising a non-woven glass fiber matrix including mica particles, polymer micro-bits and a uniformly distributed binder system, is made by a wet laid procedure, as used in paper-making. A composition comprising the mica particles and polymer micro-bits, used in

A high temperature filter material, comprising a non-woven glass fiber matrix including mica particles, polymer micro-bits and a uniformly distributed binder system, is made by a wet laid procedure, as used in paper-making. A composition comprising the mica particles and polymer micro-bits, used in making the filter material, and a method of preparing the composition are also disclosed.

대표청구항 ▼

A high temperature filter material comprising a non-woven, glass fiber matrix, including mica particles, the majority of said particles being of a size below 40 microns, and polymer micro-bits produced from an expanded, thermoplastic polymer selected from the group of a styrene-polymer, a lower poly

A high temperature filter material comprising a non-woven, glass fiber matrix, including mica particles, the majority of said particles being of a size below 40 microns, and polymer micro-bits produced from an expanded, thermoplastic polymer selected from the group of a styrene-polymer, a lower polyolefin, which is a polymer of an ethylenically unsaturated hydrocarbon monomer having from 2-6 carbon atoms, or copolymers or blends of said polymers, each said polymer being non-brittle in expanded form, or produced from a flexible foamed polyurethane, said polymer micro-bits being substantially completely free of intact cells of the expanded or foamed polymer from which they are produced, said matrix having uniformly distributed throughout a compatible binder system comprising an organic binding agent, which is insoluble in cold water and soluble in hot water and which retains its binding action upon cooling, for binding the points of contact of the fibrous and particulate components of said filter material and a film-forming siloxane polymer for aiding in the retention of the particulate components in said filter material.