Asahi Kasei Fibers put thermal-cohesion yarn "ROICA SF" on market. Cohesion with conventional heat treatment.
Asahi Kasei Fibers has developed "ROICA SF" with excellent thermal-cohesion properties as the 8th sub-brand of its spandex fiber "ROICA" and put it on the market. Because of its polymers modification "ROICA SF" can be deformed to a shape that is difficult to uncouple because the spandex is interlocked by the heat from the conventional finishing process (heat setting and dyeing etc) without loosing ROICA's original elongation recovering and heat resistance properties. These characteristics (1) make fewer runs in fabric and stockings caused by slipped loop (2) reduce curling of fabrics which typically occurs in 2-way tricot and bare gray sheeting and (3) prevent the edge of the fabric becoming raveled up.
The following are a comparison in properties preventing runs, curling and raveling between a conventional product and “ROICA SF.”
1. Run prevention
● Nylon union knit bare gray sheeting comparison
Yarn: Ny 33dT/26f ＊spandex 33dT
▼ Evaluation method
The condition of runs on specimens was compared after dyeing specimens in the usual conditions, making a 3cm lengthwise cut and stroking the stitched part with a nail.
● Stocking comparison
Yarn : Ny13dT/7f ＊spandex 33dT
▼ Evaluation method
The image of length of runs on stockings is taken when they are put on mannequins after being cut in 5 places for 1 stitch at 5mm intervals around the thigh area.
2. Curling prevention
● Nylon union knit bare gray sheeting comparison
Yarn: Ny 33dT/26f ＊spandex 33dT
▼ Evaluation method
The condition of curling is compared after dyeing specimens in the usual conditions and washing 10 times.
3. Raveling prevention
● Nylon union knit bare gray sheeting comparison
Yarn: Ny 33dT/26f ＊spandex 33dT
▼ Evaluation method
The condition of raveling is compared after dyeing specimens in the usual conditions and washing 50 times.
Unitika Fibers develops anti permeation photography material.
Unitika Fibers has developed "Selfguard," a material that prevents infrared permeation photography and will start its sales for underwear for various sports and linings (competition/ usual swimsuits and leotards).
Since infrared light can pass through more materials than visible wavelengths, infrared photography may capture objects that cannot be seen with visible wavelengths. Permeation photography with infrared cameras targeting athletes has been a social problem over the past few years. "Selfguard" can prevent permeation photography for sheer wear by absorbing the infrared rays.
| Difference between normal and infrared photography |
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Toray to boost production capacity of carbon fiber by total of 4,000 tons in Japan, U.S. and France.
To build new prepreg production facilities in Ishikawa factory in Japan.
Toray made a decision to expand production capacity of its carbon fiber "TORAYCA" composite material simultaneously at its three manufacturing bases in Japan, the U.S. and France, responding to the full-scale expansion in demand for PAN-based carbon fiber for uses including aircraft applications. The company plans to spend 55 billion yen in total to build additional facilities at all manufacturing bases of the group by the beginning of 2009 and to build a second prepreg (carbon fiber sheets impregnated with resin) manufacturing facility at its Ishikawa plant (Nomi-shi, Ishikawa), in addition to its Ehime plant (Masaki-cho, Ehime).
Since 2004, Toray has been carrying out concentrated capital investment in carbon fiber products, and it is already committed to boosting capacity to 13,900 tons a year by August 2007(from 7,300 tons at the end of 2003). With the decision this time, the group's production capacity for carbon fiber will increase by 4,000 tons to 17,900 tons a year and that for prepreg by 11.6 million m2 to 33.8 million m2 a year.
Kuraray Living and Komatsu Seiren develop antistatic wiping cloths.
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| Antistatic wiping cloths “Kurasauber” |
Kuraray Living and Komatsu Seiren have jointly developed and put antistatic wiping cloths "Kurasauber" on the market.
"Kurasauber" has an improved antistatic property through a combination of antistatic performance of Kuraray's carbon-containing electrically conductive fiber yarn "Kuracarbo" and Komatsu Seiren's antistatic finishing. It is an environment-responsive product with long-term reusability and excellent durability.
"Kurasauber" is a polyester fabric made of 0.07dtex ultrafine yarn. It has a structure to trap dust caught by ultrafine yarn and not to release it, being a special double cloth forming a characteristic "ribbing." Friction-charged electrostatic potential of 60V and a half-life of less than 1 second were achieved so that results in reducing static electricity produced by wiping and neutralizing and removing the static electricity quickly while wiping. This prevents wiped objects being charged and dust once wiped being transferred back onto the cleaned surface. Even after 20 washings its friction-charged electrostatic potential is 190V which is still low with a half-life of less than 1 second, maintaining good antistatic properties.
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