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

Active Publication Date: 2017-10-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, for the treatment of waste cotton textile fibers, waste cotton textile fibers with poor quality are generally burned or landfilled, but this method is easy to pollute the environment; waste cotton textile fibers with good quality can be used as textile raw materials For textile processing, making nonwovens or as raw materials for papermaking, but the added value of products prepared by these methods is low, which is not conducive to industrial mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses a high-performance fiberboard based on recycling of waste cotton textiles and a preparation method thereof. The preparation method comprises the steps of cutting waste cotton cloth into broken pieces of cloth first, soaking in water, uniformly mixing the broken pieces of cloth, water, sodium hydroxide and hydrogen peroxide, and then continuously cooking; cleaning with water, grinding into thick liquid by using a disc mill, drying, and then performing secondary crushing, so that cotton fiber is obtained; uniformly mixing polyisocyanate and the cotton fiber, so that sized cotton fiber is obtained; laying the sized cotton fiber, and then pre-pressing and forming, so that a pre-pressed board is obtained; and then heating to 100 to 200 DEG C, hot-pressing, and then cooling, so that the high-performance fiberboard is obtained. The fiberboard has the advantages of excellent physical and mechanical properties, low water absorption, environmental friendliness, simplicity and easiness in implementation and is suitable for industrial production, secondary high-value application of the waste cotton textiles is realized, and the preparation process has no special requirements on equipment and can be realized by existing processing equipment.

Description

technical field [0001] The invention relates to a preparation method of a novel fiberboard, in particular to a high-performance fiberboard based on the recycling of waste cotton textiles and a preparation method thereof. Background technique [0002] Cotton fiber is one of the most important textile raw materials and the most productive natural fiber. According to statistics, the global consumption of cotton in 2011 totaled 24.243 million tons, of which my country's consumption accounted for about 40% of the world's total. In recent years, with the development of the textile industry and the improvement of people's living standards, and the shortening of the service life of textiles, the amount of waste textiles has continued to rise. A large amount of textile waste, such as leftovers from the production process, waste yarn, waste cloth and Used clothes and other textiles are often used to wipe oil stains, clean floors, or be directly discarded and buried or incinerated. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/00B27N3/08D21C3/02D21D1/20
CPCB27N3/002B27N3/007B27N3/08D21C3/02D21D1/20
Inventor 李光吉陈庚邓俊杰
Owner SOUTH CHINA UNIV OF TECH
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