摘要:
A production method of a carbon fiber precursor fiber and/or a fiber bundle which permits easy bundling of a plurality of small tows into one bundle, with a dividing capability to divide into the original small tows spontaneously at the time of firing, and is suitable for obtaining a carbon fiber that is excellent in productivity and quality. A production method of carbon fiber precursor fiber and/or a fiber bundle that has a degree of intermingle of 1 m−1 or less between small tows, consists of substantially straight fibers without imparted crimp, a tow of which straight fibers has a moisture content of less than 10% by mass when housed in a container, and has a widthwise dividing capability to maintain a form of a single aggregate of tows when housed in a container, taken out from the container and guided into a firing step, and to divide into a plurality of small tows in the firing step by the tension generated in the firing step.
摘要:
A novel process is provided for making spin-drawn yarn from poly(trimethylene terephthalate). The yarn, when packaged on a cheese-shaped spindle, can be produced in large sizes without crushing.
摘要:
The polyethylene naphthalate fiber for industrial material having a low fatigue in a composite is a polyethylene naphthalate fiber for industrial material containing an ethylene-2,6-naphthalate unit in 80% or more, characterize by having a strength of 6 cN/dtex or more and a secondary yield point elongation degree of 8% or less. The production method thereof is a method for producing a fiber in which a fiber having been obtained by melt-spinning a polyethylene naphthalate is subjected to stretching, characterized in that prestretch satisfying such conditions as the fiber temperature of from 80° C. to 120° C. and from 0.05 to 0.3 N/dtex is performed, a first stretch satisfying such conditions as the fiber temperature of from 130° C. to 180° C. and stretch tensile force of not more than the prestretch tensile force is performed, the total stretch magnification including subsequent stretches is set to 5 or more, and finally heat-treatment under tension with a stretch ratio of from 0 to 2% is performed.
摘要:
Improved staple fibers and processes for producing them are provided. The processes are particularly useful for forming staple fibers from poly(trimethylene terephthalate), especially carpet staple fibers. The processes include prewetting undrawn yarns and drawing the fibers under wet and warm conditions, thermo-fixing the texture, and drying at relatively low temperatures. Fibers produced according to the processes disclosed herein have improved properties and reduced brittleness as compared to fibers prepared using conventional processes.
摘要:
A process for producing high strength, high shrinkage nylon 66 filament yarn for industrial fabrics formed as airbag fabrics, the process having the steps of drawing of a nylon 66 LOY filament yarn having a relative viscosity RV of at least 40 by at least three heatable draw roll units, winding the drawn yarn onto a cylindrical yarn support, and at a relaxation ratio of 4 to 10% setting a temperature of a last draw roll unit before winding to between 70.degree. C. and 160.degree. C., and setting a winding tension to less than 0.2 cN/tex.
摘要:
Polyester yarn is produced from melt spun filament by prestretching the filaments individually in counterflow with a gaseous medium and then afterstretching the polyester filaments with an individual titer of 1.0 dtex to 7.5 dtex with a stretching ratio of 1:1.5 to 1:1.15 at a temperature of 80.degree. to 250.degree. C. The filaments are collected and then wound up as a yarn at a speed of 5000 to 8000 m/min.
摘要:
1. A PROCESS FOR THE PRODUCTION OF CONTINUOUS FILAMENT POLYESTER FANCY YARNS HAVING IMPROVED SOFTNESS AND DYEING PROPERTIES, COMPRISING SUBJECTING AN INITIALLY UNSTRETCHED CONTINUOUS FILAMENT POLYESTER YARN FIRST TO PARTIAL STRETCHING BY A FACTOR 2.5-3.5 X IN A BATH OF A CRACK-PRODUCING AGENT AND THEN TO A SUPPLEMENTARY
STRETCH IN THE ABSENCE OF SUCH AGENT BY A CONTINUOUSLY VARYING FACTOR, AND BEFORE OR AFTER THE SUPPLEMENTARY STRETCH GIVING THE YARN A RELAXING HEAT TREATMENT WHILE ALLOWING IT TO SHRINK.
摘要:
1. A PROCESS FOR THE PRODUCTION OF ORIENTED CONTINUOUS FILAMENTS OF POLYESTTERS OR POLYAMIDES OF FIBER-FORMING MOLECULAR WEIGHT BY SPINNING THE POLYMER AND ORIENTING THE RESULTING FILAMENT BY STRETCHING IN WHICH THE SPINNING AND STRETCHING ARE CARRIED OUT AS A SINGLE CONTINUOUS PROCESS, WHICH COMPRISES AS A SERIES OF SUCCESSIVE STEPS, ONE FOLLOWING IMMEDIATELY ON ONE ANOTHER IN THE FOLLOWING ORDER: (A) EXTRUDING AS CONTINUOUS FILAMENTS THE MOLTEN POLYMER INTO AN ATMOSPHERE AT SUBSTANTIALLY THE AMBIENT TEMPERATURE; (B) COOLING THE FILAMENTS SO FORMED DIRECTLY TO A TEMPERATURE T1 BETWEEN 55* AND 130*C. WHICH IS (I) ABOVE 55*C., (II) AT LEAST 5*C. ABOVE THE SECOND ORDER TRANSITION TEMPERATURE OF THE POLYMER, AND (III) NOT HIGHER THAN THE MAXIMUM TEMPERATURE AT WHICH STRETCHING FILAMENTS OF THE POLYMER ORIENTS THEM; (C) POSITIVELY FORWARDING THE FILAMENTS WHEN THEY HAVE REACHED THE SAID TEMPERATURE T1 AT A SPEED V1 HIGHER THAN THE EXTTRUSION SPEED, WHEREBY THE FRESHLY EXTRUDED FILAMENTS ARE ATTENUATED WITHOUT BEING SUBSTANTIALLY ORIENTED;
(D) COOLING THE FILAMENTS FURTHER TO A TEMPERATURE T2 BELOW 75*C. WHICH IS ALSO BETWEEN T1 AND THE AMBIENT TEMPERATURE, BY CAUSING THEM TO CONTINUE TO TRAVEL THROUGH AN ATMOSPHERE AT THE AMBIENT TEMPERATURE; AND (E) POSITIVELY FORWARDING THE FILAMENTS WHILE THEY ARE AT THE SAID TEMPERATURE T2 AT A SPEED V2 WHICH IS GREATER THAN V, THE RATIO V2/V1 BEING FROM 3:1 TO 6:1, WHEREBY THE FILAMENTS SO PRODUCED ARE ORIENTED.
摘要:
A PROCESS FOR DRAWING POLYESTER FILAMENTS THAT INCLUDES THE STEPS OF DRAWING THE FILAMENTS IN A FIRST ZONE AT A TEMPERATURE BETWEEN 10* C. AND 50* C. FOLLOWED BY FURTHER DRAWING THE FILAMENTS IN A SECOND ZONE AT A TEMPERATURE ABOVE 70* C. BUT BELOW THE MELTING POINT OF THE POLYESTER. WHEN THE POLYESTER IS POLYETHYLENE TEREPHTHALATE, IT IS PREFERRED THAT THE FILAMENTS BY DRAWN AT LEAST ABOUT 2.6 TIMES THEIR ORIGINAL LENGTH AT A TEMPERATURE BETWEEN 25*C AND 45* C. IN THE DRAW ZONE AND THEN FURTHER DRAWN IN THE SECOND DRAW ZONE AT A TEMPERATURE FROM ABOUT 70* C. TO ABOVE 150*C. TO PROVIDE A TOTAL DRAW RATIO OF AT
LEAST ABOUT 2.8:1. THE FIBERS PRODUCED HAVE A TENACITY AT 7 PERCENT ELONGATION OF LESS THAN 2.0 GRAMS PER DENIER, A LOW SHRINKING FORCE AND WHEN BLENDED WITH COTTON PROVIDE A BLEND YARN HAVING A HIGH LEA PRODUCT.
摘要:
HIGH DRAW RATIOS CAN BE ACHIEVED TO YIELD HIGHSTRENGTH POLYAMIDE HOSIERY YARN WHICH EXHIBITS UNIFORM LUSTER BY MAINTAINING THE RATIO
AT LESS THAN 1.02 GRAMS PER DENIER-CM T1 IS TENSION ON A FILAMENT APPROACHING THE DRAW ZONE; T2 IS THE TENSION ON A FILAMENT RECEDING FROM THE DRAW ZONE; D IS THE DRAWN DENIER OF THE FILAMENT AND D IS THE DIAMETER OF THE DRAW PIN OR SNUBBING ELEMENT IN CM.