连续纤维增强热塑性复合材料

2.Impregnation methods


Melt impregnation Commingling Powder impregnation Co-weaving Solvent impregnation In situ polymerization
2.1 Melt impregnation
US patent 5,529,652
1.fiber yarns 13,36.heater 14~18,30~32. roller 27.resin particles 28.porous wall 29.particles bath 33.vibrator 34.silent blocks 35.bars
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Continuous Fiber Reinforced Thermoplastic Composites (CFRT)
Gavin Zhang 2013
1. Introduction of CFRT
SFT: Short fiber reinforced thermoplastic materials. Chopped glass fiber compounded into the polymer matrix. LFT: Granular thermoplastic materials produced in a process where reinforcing fiber length equals granule length. CFRT: Continuous fiber reinforced thermoplastic materials
2.4 Co-weaving
2.5 Solvent impregnation
Schematic of a solution impregnation process
2.6 In situ polymerization
Monomer viscosities are significantly low; Impregnating fiber using monomers in situ polymerization.




1.High strength (Take advantage of the full strength of the reinforcing fibers) 2.High impact resistance 3.Lightweight 4.Recyclable 5.Resistant to rot, corrosion and mildew 6.Design Flexibility
Advantages: high production efficiency disadvantages : process is difficult to control powers should be approximately the same diameter with the fibers
Raw materials
Broad possibilities
Resins PP PET PA PC PPS PEI …… Fibers Glass fiber Carbon fiber Kevlar fiber Basalt fiber …… Additives Antioxidant UV stabilization Flame retardant agent Custom color ……

US patent 5,529,652; US patent 6,251,206b1
1.extruder 2.casing 3.rotary screw 4.heater 5.crosshead 6.fiber bundle 7.cavity 8.inlet unit 9. resin chamber 10.outlet nozzle unit 11.main body 12overflow opening 13. molten resin 14.guide roller 15.impregnation roller 16.heater 17.ajustable heater 18.cooling unit 19.winding unit 20.guide roller 21.water pan
Tensile strength (MPa ) Tensile modulus (GPa ) Flexural strength (MPa ) Flexural modulus (GPa )
192
254
18 405 17
CFRTPA66 (GF:50%) 400
21பைடு நூலகம்8 590 22.8
Advantages of CFRT
Effect of fiber length on mechanical properties of glass fiber reinforced PA66
Property PA66 SFT-PA66 LFT-PA66 (GF:0%) (GF:50%) (GF:50%) 70
2.8 100 2.4 295 11.4
Thermoplastic monomers Reinforcement In-situ Polymerization Composite final Parts
Advantages: high production efficiency easy to realize disadvantages : thermal degradation hard to get full impregnation
2.2 Commingling

TWINTEX
2.3 Powder impregnation
Applications
Marketing future



“The market for continuous fiber reinforced thermoplastic composites has experienced exceptional growth in recent years with a global growth rate of 105% in last 5 years. The growth rate in 2002 was 93%.” “Historically, continuous fiber reinforced thermoplastic composites were used in niche applications in aerospace and defense market. But in recent years, the market has exploded in automotive, sporting, transportation, industrial and other applications. Demand has been driven by a variety of aerospace, automotive and truck applications. “ Report Information Opportunities in Continuous Fiber Reinforced Thermoplastic Composites 2003-2008