Technora
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"Aramid" fibers is the generic name of wholly aromatic polyamide granted by the Federal Trade Commission (FTC) in 1974 to describe fibers made from "amide polymers in which at least 85% of the amide linkages are attached directly to two benzene rings". Aramid fibers are classified into 2 categories. One is Meta-linked type with high resistance to flame and heat, and the other is Para-linked type with high tenacity and high modulus. Technora0 is a para-aramid fiber independently developed by Teijin, which has been commercially available since 1987. It has high tensile strength, high modulus...

T-200 Multi-filament yam for mbber reinforcement T-202 Pre-activated multi-filament yam for mbber reinforcement T-221 Multi-filament yam which has good abrasion and bending fatigue resistance for rope applications T-240, T-741 Multi-filament yam for weaving and knitting T-240B (Black) Dope dyed black multi-filament yam with better light resistance for weaving and knitting T-320, T-321, T-322EH Chopped fiber for resin and cement reinforcement T-323SB Chopped fiber specially treated for better adhension and dispersion, suitable for mbber compound T-330 Staple fiber for spun yam and non woven...

(1) High tensile strength The tensile strength of Technora® is 24.5cN/dtex, 347kg/mm2), which is 8 times as strong as steel and 3 times as strong as fiberglass, polyester and nylon of the same weight. This property will serve significantly to reduce weight. (2) Fatigue resistance High tenacity fibers generally show great degradation of strength against repeated abrasion, flexure and stretch, but Technora® has more excellent fatigue resistance than other high tenacity fibers. (3) Dimensional stability Technora® has stiff and highly oriented molecular structure, which leads to high tensile...

Table 2 Standard Performance of Technora0 Color Density Filament diameter Tensile strength Tensile strength Tensile modulus Tensile modulus Elongation at break Thermal decomposing temperature Heat of combustion Specific heat Limited oxygen index Equilibrium moisture regain

Tensile properties of Technora® are shown in the following Table and Graphs, in comparison with other industrial fibers. Table 3 Tensile Properties of Industrial Fibers • Wet strength is same as dry strength. • Knot strength and Loop strength are respectively about 25% and 40% of tensile strength. • Impact strength is high. As shown in Graph 4, strength remarkably increases according to the stretching speed.

Tensile strength (kg/mm2) Tensile strength (cN/dtex)

Graph 3 Specific Tensile Strength and Modulus Tensile strength (cN/dtex) Specific tensile stregth (x 106cm) 0 polyarylate (HT) PPTA (regW #^TA (HM) • polyarylate (UM) Specific tensile modulus (x 108cm) Graph 4 The effect of stretching speed on tensile strength of Technora®

Table 4 Fatigue and durability of Technora®

Technora® has high dimensional stability against such external factors as stress, heat and so on, due to its rigid molecular structure, combined with full orientation. • Technora®’s creep and stress relaxation can be seen in Graph 5 and 6, which show its good dimensional stability. • Thermal shrinkage is undetectable at up to 20013 and less than 2% at 40013 as shown in Graph 7. Graph 5 Creep of Technora0 Test method Sample: Technora0, PPTA—regular 1670 dtex— 1000 filaments Load: 30% of tensile strength (Technora012.6kg, PPTA 10.1 kg) Room Temperature

• Technora®’s thermal stability is good and it can be widely applied to heat-resistant uses. Its glass transition temperature is not clear and thermal decomposition starts at about 500‘C. (See Graph 8) • Tensile strength and modulus under high temperature are shown in Graph 9 and 10. Even at 250t Technora® maintains more than half of its room temperature tensile strength and modulus.

Tensile modulus (cN/dtex) Tensile strength (cN/dtex)

• The high heat resistance allows Technora®to keep high strength after long periods in hot air. • LOI (Limited Oxygen Index) of Technora® is 25. • Ignition point of Technora® is about 650°C and heat of combustion is 6800cal/g.

6. Chemical Properties Chemical resistance of Technora® Technora®’s chemical resistance (retention of strength) is shown in Table 5 and 6 and Graph 12 and 13. Its resistance against steam is shown in Graph 14 and 15. Table 5 Chemical resistance (1)

Table 6 Chemical resistance (2)

Retention of strength (%) Retention of strength (%)

Retention of strength (%) Retention of strength (%)

(1) Resistance to light High tenacity fiber has generally low light resistance. The strength of Technora® can be lowered to a half when exposed to sunlight for about 3 months. For applications directly exposed to sunlight, the surface of the fiber is recommended to be covered by some other materials. (Technora0 dope-dyed Black is also available for better sunlight (UV) resistance. | Please contact us for details. j Color fastness to light Test method JIS L0842 Carbon Fade-Ometer 63°C X20hrs (2) Electrical property Technora® is an insulator which has an electrical resistance of 5x...

Test method Sample : Technora® filament T-200 1670dtex/1 Technora® gtn t-400 220dtex/i Twist number (turn / m) X J linear density (tex) 1055 (Above equation is described in ASTM D885 for aramid fibers.)

Technora® is registered as a chemical name of co-poly-(paraphenylene/3.4'-oxydiphenylene terephthalamide). CAS.No 60201-66-3 ISO-9001 Certification number I JQA-1019 Scope of Registration : THE DESIGN / DEVELOPMENT AND MANUFACTURE OF FILAMENT YARN (TecHlIOra®)