초록 ▼

Acid- and caustic- resistant rolls are prepared by forming a nonwoven web of randomly laid entangled polyolefin fibers, stacking a multiplicity of segments of the web into a pile, compacting the pile under a compaction force equivalent to a room temperature compaction force of about 20×105 to 55×105

Acid- and caustic- resistant rolls are prepared by forming a nonwoven web of randomly laid entangled polyolefin fibers, stacking a multiplicity of segments of the web into a pile, compacting the pile under a compaction force equivalent to a room temperature compaction force of about 20×105 to 55×105 Pa, restraining the pile on its compacted configuration, and, if needed, dressing the sides of the compacted pile to form a smooth cylindrical surface. The preferred polyolefin fibers are formed of polyethylene, polypropylene or polybutylene.

대표청구항 ▼

A roll especially suited for stripping harsh aqueous chemical solutions from the surface of metal sheet, said roll comprising a cylindrical body supported on its cylindrical axis for rotation, said body comprising a compacted pile formed of a multiplicity of like-oriented disc elements of nonwoven,

A roll especially suited for stripping harsh aqueous chemical solutions from the surface of metal sheet, said roll comprising a cylindrical body supported on its cylindrical axis for rotation, said body comprising a compacted pile formed of a multiplicity of like-oriented disc elements of nonwoven, randomly laid, entangled, fibers formed of chemically resistance polyolefin, said compacted pile having a density of about 430 to about 600 Kg/m3.