High-performance fiberboard based on recycling of waste cotton textiles and preparation method thereof
A technology of high-performance fiber and cotton textiles, applied in textile and papermaking, fiber raw material processing, pulping with inorganic alkali, etc., can solve the problems of environmental pollution, unfavorable mass production, low product added value, etc., and achieve good application prospects , No formaldehyde release effect
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Embodiment 1
[0027] Preparation of cotton fiber: cutting waste cotton cloth into rags, soaking in water for 48 hours, mixing 2kg of rags with water with a mass fraction of 2000%, 8% sodium hydroxide and 5% hydrogen peroxide in the Cook continuously at 180°C for 12 hours; wash the rags after cooking with water; grind the above rags 6 times by disc grinding method, dry the ground slurry to a moisture content of 10%, and use a cutting grinder The second pulverization was carried out at 1500 rpm to obtain cotton fibers, the mass average length of which was 0.5 mm; the average width was 12 μm, and the mass content of fine fibers greater than or equal to 200 mesh was 50%.
[0028] Preparation of high-performance fiberboard: In terms of mass fraction, spray 15 parts of MDI evenly on the surface of 85 parts of cotton fibers to obtain sizing fibers. The press plate is hot-pressed at 60MPa and 180°C for 160 seconds, and finally left to cool at room temperature to obtain a high-performance fiberboard...
Embodiment 2
[0031]Preparation of cotton fiber: Cut the waste cotton cloth into rags, soak in water for 6 hours, mix 2kg of rags with water with a mass fraction of 1000%, 20% sodium hydroxide and 10% hydrogen peroxide at 120 Continuous cooking at ℃ for 6 hours; wash the rags after cooking with water; grind the above rags 3 times with the disc grinding method, dry the ground slurry to a moisture content of 15%, and use a cutting grinder to Secondary pulverization at 1500 rpm to obtain cotton fibers with a mass average length of 1.0 mm, an average width of 30 μm, and a mass content of fine fibers greater than or equal to 200 mesh of 15%.
[0032] Preparation of high-performance fiberboard: In terms of mass fraction, 30 parts of TDI was uniformly sprayed on the surface of 70 parts of cotton fibers to obtain sizing fibers, and the sizing fibers were paved and pre-pressed at 20 MPa. The press plate is hot-pressed at 10MPa and 140°C for 320 seconds, and finally left to cool at room temperature t...
Embodiment 3
[0035] Preparation of cotton fiber: Cut waste cotton cloth into rags, soak in water for 24 hours, mix 2kg of rags with 500% water, 30% sodium hydroxide and 15% hydrogen peroxide in 100 °C for 1 hour; wash the cooked rags with water; grind the above-mentioned rags once by pan grinding, dry the ground slurry to a moisture content of 20%, and use a cutting grinder to Secondary crushing at 1500 rpm to obtain cotton fibers with a mass average length of 0.3 mm, an average width of 15 μm, and a mass content of fine fibers greater than or equal to 200 mesh of 25%.
[0036] Preparation of high-performance fiberboard: In terms of mass fraction, 40 parts of MDI was uniformly sprayed on the surface of 60 parts of cotton fibers to obtain sizing fibers, and the sizing fibers were paved and pre-pressed at 20 MPa. The press plate is hot-pressed at 30MPa and 100°C for 500 seconds, and finally left to cool at room temperature to obtain a high-performance fiberboard.
[0037] According to the n...
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