摘要:
A self-crimping filament is formed in high-speed spinning by joining hot and cool molten substances of a single polymer substantially at or preferably below the face of the spinneret. This increases the bulk of a yarn containing such filaments.
摘要:
A synthetic polymer hollow irregular multifilament yam useful for producing bulky yam products comprises a plurality of hollow irregular individual filaments each comprising a hollow filamentary constituent, a non-hollow sinuous filamentary constituent sinuously extending in a wave form along the hollow filamentary constituent, having a smaller average thickness than the hollow filamentary constituent and being connected to one side of the hollow filamentary constituent through a middle filamentary constituent distortedly extending along the hollow filamentary constituent and having a cross-selectional profile in the form of a waist, and is produced by extruding at least one polymer melt through a spinneret having a plurality of spinning orifices each consisting of a first orifice segment adequate for forming a hollow filament, a second orifice segment adequate for forming a non-hollow filament and having a smaller cross-section than that of the first orifice segment and a third orifice segment in the form of a slit connected to both the first and second orifice segments, by cooling the extruded hollow irregular filamentary streams to solidify them and by taking up the resultant hollow irregular multifilament yam.
摘要:
A bulked fibre of fibre-forming polyester, for example polyethylene terephthalate, containing between 0,1% and 10% by weight of either an immiscible polymer or a liquid crystal polymer and a process for producing such bulked fibre.
摘要:
A filamentary structure 5 comprises a helical thermoplastic core filament 6 disposed within a thermoplastic sheath component consisting either of a tube or of at least three thermoplastic filaments 7, the sheath component being joined at 8 to the successive turns of the core filament 6. The core filament 6 and the sheath component may comprise the same or different thermoplastic polymers, suitable polymer being polyamides, polyesters and polyolefins. The core filament 6 and the sheath component may be extruded together from a spinning jet, and a plurality of the filamentary structures 5 may be extruded side-by-side so that their sheath components are joined together to form a fabric structure.
摘要:
Polyester polymer is extruded at different speeds through parallel closely spaced orifices (20, 22) at relatively high spinning speeds. The resulting filament has high and low shrinkage regions substantially regularly spaced apart along its length. Ayarn including a number ofthese filaments spontaneously develops crimps when relaxed.
摘要:
A process for producing a latent heat-bulkable polyethylene terephthalate yarn comprising melt spinning a polyethylene terephthalate fiber-forming polymer into a plurality of filaments (10), cooling the melt-spun filaments in quench zone (14) below the second order transition temperature and taking up the filaments as a yarn at a speed in excess of 8000 feet per minute, characterised in that the cooled melt-spun filaments are divided into at least two groups and at least one of the groups is subjected to a heat treatment above the second order transition temperature, the filaments then being recombined.
摘要:
Provided are a lyocell material, a filter for a smoking article and including the lyocell material, and a method of manufacturing these. The lyocell material manufactured according to the present application and a filter for a smoking article including the same replace conventional cellulose acetate materials and filters, and not only has excellent biodegradability, but also provides excellent filter manufacturing processability and excellent tobacco physical properties (e.g. hardness).
摘要:
Nonwoven fabric (1) comprising a plurality of filaments (2) made of at least two different materials (A, B), said multicomponent filaments (2) having two sub-filaments (2a, 2b) co-extruded from said materials (A, B) in side-by-side arrangement and adhered to one another, wherein the material (A) of a first sub-filament (2a) has melting temperature (T1) different from the melting temperature (T2) of the material (B) of a second sub-filament (2b) by at least 10°C and wherein, in cross section, the contact surface between said two sub-filaments (2a, 2b) is substantially wave-shaped