Multicomponent monofilament for papermaking forming fabric
AssigneeShakespeare Company
InventorsDavid B. Skinner, Atiye E. Tanverdi
Life of this patent
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Abstract
A melt-extruded multicomponent monofilament having good abrasion resistance, flex-fatigue toughness and dimensional stability. The monofilament is particularly suitable for use in the manufacture of papermaking machine forming fabrics, and includes an outer region component comprising polyethylene terephthalate and an inner region component comprising a blend of polyetherester block copolymer and polyethylene terephthalate.
Claims22
A melt-extruded multicomponent monofilament comprising:
- (a) an outer region component comprising polyethylene terephthalate or a copolyester comprising at least about 80 mole percent of ethylene terephthalate units;
- (b) a first inner region component comprising a blend of from about 1 to about 20 percent by weight of a polyetherester block copolymer and from about 80 to about 99 percent by weight of polyethylene terephthalate or a copolyester comprising at least about 80 mole percent of ethylene terephthalate units;
- and
- (c) a second inner region component, wherein the outer region component and the first and second inner region components are combined in a sheath-mantle-core arrangement.
A forming fabric for a papermaking machine, the fabric comprising:
- melt-extruded multicomponent monofilaments comprising:
- (a) an outer region component comprising polyethylene terephthalate or a copolyester comprising at least about 80 mole percent of ethylene terephthalate units;
- and
- (b) an inner region component comprising a blend of from about 1 to about 20 percent by weight of a polyetherester block copolymer and from about 80 to about 99 percent by weight of polyethylene terephthalate or a copolyester comprising at least about 80 mole percent of ethylene terephthalate units.
A forming fabric for a papermaking machine, the fabric comprising:
- filaments woven in at least two directions, wherein the at least two directions include at least one layer of machine direction filaments and at least one layer of cross-machine direction filaments, and wherein the cross-machine direction filaments comprise melt-extruded multicomponent monofilaments comprising:
- (a) an outer region component comprising polyethylene terephthalate or a copolyester comprising at least about 80 mole percent of ethylene terephthalate units;
- and
- (b) an inner region component comprising a blend of from about 1 to about 20 percent by weight of a polyetherester block copolymer and from about 80 to about 99 percent by weight of polyethylene terephthalate or a copolyester comprising at least about 80 mole percent of ethylene terephthalate units.
Dependencies are inferred from the claim text.