Engineering fibre manufacturing technique for polyester reclaiming material road
A technology of recycling materials and engineering fibers, which is applied in the direction of single-component polyester artificial filaments, filament generation, heating/cooling fabrics, etc., can solve the problems that cannot meet the performance requirements of road engineering fibers, and achieve a large elastic modulus , Low production cost, easy to disperse effect
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Embodiment 1
[0018] The production process of polyester recycled material road fiber in this example adopts the prior art polyester recycled material production process of fiber, and makes corresponding improvements; the specific process includes: batching, feeding, vibrating screening, conveying, pre-drying , drying or viscosifying drying, adding nucleating agent (PP), screw extrusion, melt filtration, spinning, tow cooling, winding oiling, reciprocating falling barrel, clustering, drawing, tension heat setting, through crimping Machine, loose heat setting, cutting, packing and other steps.
[0019] In the batching step, for polyester recycled materials from different sources, select polyester recycled materials with an intrinsic viscosity value above 0.8(η), PVC content ≤ 40ppm, aluminum and other metal content ≤ 20ppm, and glue and other pollutants content of zero; characteristics The detection method of the viscosity value adopts the Ubbelohde viscosity method, and the intrinsic viscos...
Embodiment 2
[0029] In this example, on the basis of the first embodiment above, the specific implementation parameters are selected as follows:
[0030] The intrinsic viscosity of the raw material is controlled at 0.85±0.05η, the intrinsic viscosity of the spinning melt is controlled at 0.66±0.02η, the addition ratio of nucleating agent PP is 2.5±0.5%, the oiling rate is 0.1~0.15%, and the oil bath temperature is 80±5℃ , the temperature of the third drafting roll is 140-160°C, the setting temperature of the fifth roll is 180-200°C, the relaxation heat setting time is 25-30min, and the setting temperature is 130-140°C. The technical indicators of the road engineering fiber produced are as follows :
[0031] project
indicators
project
indicators
Denier (dtex)
3.0~3.5
Melting point (°C)
255
Breaking strength (cn / dtex)
≥5.5
Ignition point (℃)
555
Specific gravity (g / cm3)
1.36
safety
non-toxic
Elo...
Embodiment 3
[0036] The difference between this example and the first example above is that when the intrinsic viscosity of the raw material is in the range of 0.75-0.80η, the drying temperature is controlled in the range of 200-220°C, the drying time is more than 8 hours, and the vacuum pressure is about 0.1MPa , Use pure nitrogen to isolate the air for protection when discharging, so as to improve the intrinsic viscosity of raw materials.
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