Plastic and nonmetallic article shaping or treating: processes – With printing or coating of workpiece
Patent
1997-07-29
1998-12-29
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
With printing or coating of workpiece
264130, 26421114, 524386, 524387, 524555, 524765, 524801, 524827, D01D 508, D06M 1559
Patent
active
058536361
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a fiber treating composition for producing synthetic filaments, in particular, to a fiber treating composition applied in a high-speed spinning process of synthetic filaments.
DESCRIPTION OF THE PRIOR ART
For the purpose of facilitating the production processes of synthetic filament, a fiber treating composition is applied to impart lubricity, cohesion, and antistaticity to synthetic filaments.
Recently, constant effort for improving fiber production efficiency by increasing processing speed has achieved high-speed fiber production at 5,000-8,000 m/min. Such a speedup of fiber production process will probably be accelerated in the future.
For increasing fiber production speed, the modification of fiber production machinery is required at first, and the modification of fiber treating composition is also required. Increased fiber production speed requires correspondingly high performance of fiber treating compositions, such as superior lubricity, filament cohesion and antistaticity.
Furthermore, uniform and sufficient coating of fiber treating composition on fiber surface is also important for high-speed fiber production, and is noted by those skilled in the art.
A fiber treating composition is usually applied to fibers in spinning process with metering-pump, which constantly feeds the aqueous emulsion of a fiber treating composition, or with kiss roll. The filament applied with the fiber treating composition is then processed in spin-draw system where the filament is drawn between first and second godet rolls at an optimum draw ratio (3 to 5 times) and wound into packages; or in high-speed spinning system where the filament is wound into packages without drawing.
With the increase of fiber production speed, sling off or insufficient application of fiber treating composition is apt to increase leading to uneven application of fiber treating composition on filament yarns. Uneven or insufficient application of fiber treating composition causes yarn breakage, fluffs, nonuniform yarn thickness, and dye defect, because of the severe processing condition of high-speed production. Those troubles result in serious problems, such as increased production cost and decreased yarn quality.
Under such situation, a fiber treating composition, which adsorbs sufficiently to filament surface with minimum sling off has been required.
For meeting such requirement, a fiber treating composition containing high molecular weight polyethylene oxide has been proposed in Japanese Patent Publication KOKAI (Provisional publication) H2-68370.
However, the above high molecular weight component caused scum accumulation on guides and godet rolls in spinning and processing of filament yarns resulting in increased or varied friction at filament-to-guide or roll interface. The increased or varied friction caused frequent yarn breakage and fluffs, and thus decreased yarn production efficiency and yarn quality.
Another fiber treating composition proposed in Japanese Patent Publication KOKAI (Provisional publication) H4-119128 contained a polymer derived from a polyoxyalkylene compound and an organic polyisocyanate compound for the purpose of preventing the sling off of the emulsion of the fiber treating composition and minimizing scum generation. However, the above composition was not practicable because of the poor compatibility of the polymer with other components. The polymer could merely be suspended in the composition with the aid of water as a medium, and easily separated from other components when the filament applied with the composition was dried. The separated polymer changed into sticky substance on filament surface, and caused sticky scum accumulation on guides, which was accelerated with comparatively high pickup level, 0.2 to 1.5% of fiber weight, required to the composition. Thus an ideal fiber treating composition for high speed production process of synthetic filament yarns has not been developed.
DETAILED DESCRIPTION OF THE INVENTION
The object of the present invent
REFERENCES:
patent: 5187219 (1993-02-01), Furman, Jr.
patent: 5399616 (1995-03-01), Kuhn et al.
Ishida Hirofumi
Matsunaga Tamotsu
Munekiyo Takeshi
Matsumoto Yushi-Seiyaku Co. Ltd.
Tentoni Leo B.
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