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ENGINEERED PLASTICS CARBON FIBER REINFORCED POLYAMIDE-6: A YEARS OF EXCELLENT EXPERIENCE IN AUTOMOTIVE APPLICATION

PRODUCT NOMENCLATURE (OUR TRADEMARK): “UPA”

COMPOSITION: polymeric matrix is PA-6, which is reinforced with low modulus carbon fiber (rayon based). Unlike glass fiber and PAN based carbon fiber, rayon based carbon fiber is much softer and less abrasive. This is a key advantage in wear applications, particularly if the mating surface is sensitive to abrasion.

APPEARANCE: black granules 3-4mm length

REFRACTORINESS: 130-140 ºC

TYPES OF AVAILABLE POLYMERIC MARTIX: PA-6 (NYLON-6), PA-66, PP, PET, PS

CARBON FIBER CONTENT 10 - 40 % wt.

PROCESSING OF “UPA”: injection-molding under pressure (process temperature approx. 270ºC).

NOMENCLATURE UNDERSTANDING.
“UPA-6-10” means 
Carbon fiber reinforced PA-6, and carbon fiber content is 10% wt.

ADVANTAGES AND FEATURES OF COMPOSITE MOLDED COMPONENTS

  • low density (1.18 g/cm3)
  • high dimension stability of molded products wide range of temperatures to withstand
  • low thermal expansion factor (coefficient)
  • high toughness at tensile load and bending load
  • high tensile modulus
  • high wear-resistance
  • high electrical and thermal conductivity
  • resistance to thermal and radiation shock
  • resistance to corrosive liquids
  • low friction coefficient

Molders should choose “UPA” over metals to minimize costs, reduce weight, lower noise, and ensure corrosion resistance. “UPA” is self-lubricating, lowering the coefficient of friction and extending the life of mating surfaces.

APPLICATION 

Small but complex shaped molded parts and components (details) which are used for automotive and machine building industry. Best properties performance appears when purpose of using is anti-friction, static electricity dissipation, resistance to corrosive liquids and to high temperatures, underwater applications. 

Carbon fiber reinforced PA-6 is effective to substitute non-ferrous metals and alloys, which are usually heavy (large specific gravity) and expensive.

FOR AUTOMOTIVE INDUSTRY carbon fiber reinforced PA-6 is effective for injection-molding of components which are heavy-loaded while in operation:

  • sliding bearings,
  • gear wheel limiters;
  • bearing brasses of balls;
  • cooling system impellers;
  • levers;
  • frame parts;
  • washers;
  • guides and sliding bushings;
  • oil-control rings;
  • ring gears;
  • clutches;
  • pulleys;
  • chain stabilizers (dampers);

FOR CHEMICAL EQUIPMENT ENGINEERING INDUSTRY carbon fiber reinforced PA-6 (as well as PP reinforced) is effective for injection-molding of fasteners, impellers of submerged pumps, and other complex shaped components for operation in corrosive liquids.

ELECTRICAL ENGINEERING APPLICATION: gas analyzer housing, coolers, banknote counter rotating components and like.

TEXTILE MACHINERY: fiber spinning bathes and units, weaving machine components.

CARBON FIBER REINFORCED PA-6 VERSUS NON-FERROUS METALS/ALLOYS:

  • 3-4 times more weight effective
  • 5-8 times more molding-equipment-energy-saving-effective
  • 5 times longer working period
  • 10 times more corrosion resistant.

ESSENTIAL ADVANTAGES OF CARBON FIBER REINFORCED PA-6

VERSUS GLASS FIBER REINFORCED PA-6

Carbon fiber reinforced thermoplastics, unlike glass fiber reinforced ones, do not have a property of “weariness”, i.e. it do not accumulate micro-rifts at loaded areas of molded component. Even end-to-end (through) damages of carbon fiber reinforced components do not lead to rifts increasing, as these rifts “fade” due to the presence of carbon fibers.
Electrical conductivity of “UPA” plastics exclude radiointerference, thus “UPA” is effective plastic for electronic device components.
Carbon fiber reinforced polymers are much more UV-resistant in comparison with glass fiber reinforced plastics. 
Carbon fiber important property is chemical resistance, thus, carbon fiber reinforced plastic “UPA” is more corrosive-resistant to aggressive liquids.
“UPA” is highly thermal conductive material and the same time it has a low coefficient of linear thermal expansion (0.6-0.7 × 10-5 ºC-1). So molded parts are workable within a wide temperature range keeping a stable dimensions and property parameters. Thus, component life-time is increased if your choice is carbon fiber reinforced polymer. 
There is no abrasive feature for “UPA”, as rayon based carbon fiber is low-modulus versus comparatively high modulus glass fiber and definitely high modulus PAN-based carbon fiber. Thus, “UPA” is a very good choice for mating surfaces and for injection-molding equipment. 
During molded parts usage in liquids, especially in water, carbon-fiber filled PA-6 components remain dimension-stable (no swelling), while glass fiber filled polymers swell, and its swelling is non-uniform.
Non-swelling property is a key factor while having a choice of polymer for submerged pump rotating parts (impellers, gear wheels etc).

DEVELOPMENT

We are in cooperation with leading research laboratories of Belarus and Russia. 
Our R&D activity today is new generation of carbon fiber reinforced Polysulphon, PET, PTFE, PBT. We are also starting to reinforce plastics with a new agent: aramid fiber “Arselon”.