Rotary cup spinning process of polypropylene roving
A rotor spinning, medium-length technology, applied to spinning machines, open-end spinning machines, continuous winding spinning machines, etc., can solve the problems of inability to produce polypropylene coarse-count yarn, etc., to achieve full hand feeling, smooth filter The effect of high precision and large dirt holding capacity
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[0015] Routing:
[0016] High-quality polypropylene particles → spinning → staple fiber → carding B272 → sliver making B302 → needle comb B412 → needle card B423 → needle card B432 → needle card B442 → rotor spinning.
[0017] Process design (short fiber process):
[0018] 1. Raw material selection:
[0019] High-quality polypropylene particle fiber specification: 4.5dtex~6.5dtex, length: 51mm~76mm, strength: ≥4.0CN / dtex, coefficient of variation of strength: ±10.5%, elongation at break: ≤70%, super long fiber: ≤20mg / 100g, defect: ≤25mg / 100g, number of crimps: 5.6 / cm, specific resistance: 4.2×10 7 Ω / cm, surfactant content: 0.6±0.02% (surfactant ingredients: antistatic agent 50%, diffusing agent 15%, silicone oil 30%, other additives 5%).
[0020] 2. Workshop temperature and humidity control:
[0021] Temperature: 25-28°C, relative humidity 55%-65%.
[0022] 3. Pre-spinning (combing B272):
[0023] Raw sliver weight 25g / m Weight unevenness: ≤4.5% Evenness unevenness: 20-...
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