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Method for regenerating glass fibers from waste glass fibers or products at normal temperature under normal pressure

A glass fiber and product technology, applied in the direction of solid waste removal, etc., can solve the problems of high technical threshold and large investment cost, and achieve the effect of obvious economic benefits, low equipment cost, and promoting the development of circular economy.

Inactive Publication Date: 2017-08-22
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high technical threshold and high investment cost, which is difficult for some small and medium-sized glass fiber production enterprises.

Method used

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  • Method for regenerating glass fibers from waste glass fibers or products at normal temperature under normal pressure
  • Method for regenerating glass fibers from waste glass fibers or products at normal temperature under normal pressure
  • Method for regenerating glass fibers from waste glass fibers or products at normal temperature under normal pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 Fiberglass recycling.

[0023] Put the waste glass fiber waste into a glass tank of the corresponding size, add a mixture of concentrated sulfuric acid, alkylphenol polyoxyethylene ether and tetrahydrofuran (8:1:1), immerse the glass fiber, and soak it at room temperature for 2 hours , filter and separate to remove the glass fiber, wash it with water for several times until it is clean, dry it naturally or heat it to obtain the regenerated glass fiber, store it for later use; soak the waste liquid to distill off tetrahydrofuran, add sodium hydroxide to neutralize it, and use it as a binder Or the use of additives for coatings.

Embodiment 2

[0024] Example 2 Fiberglass recycling.

[0025]Put the waste glass fiber mat into a glass tank of corresponding size, add a mixture of concentrated sulfuric acid, petroleum ether and polyethylene glycol 400 (7:2:1) to immerse the glass fiber, soak it at room temperature for 1 hour, and filter it out Glass fiber, washed with clean water for many times until clean, dried naturally or heated to obtain regenerated glass fiber, stored for later use; soaked in waste liquid and distilled to remove petroleum ether, added calcium hydroxide to neutralize, used as a binder or Additives for coatings are used.

Embodiment 3

[0026] Example 3 Fiberglass recycling.

[0027] Put the glass fiber cloth into a glass tank of the corresponding size, add the mixture of concentrated sulfuric acid, fatty alcohol polyoxyethylene ether and dioxane (4:5:1), immerse the glass fiber cloth, and soak at room temperature for 2 hours Finally, filter out the glass fiber, wash it with clean water several times until it is clean, dry it naturally or heat it to get the regenerated glass fiber, store it for later use; soak the waste liquid and distill to remove dioxane, then add calcium oxide to neutralize it as a viscose Additives for mixtures or coatings.

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Abstract

The invention relates to a method for regenerating glass fibers from waste glass fibers or products at the normal temperature under normal pressure. The method realizes comprehensive utilization of waste glass fibers and regeneration and use of glass fibers. The method comprises soaking glass fibers through a highly permeable degradation liquid so that glass fibers and a resin base are separated at the normal temperature under normal pressure and carrying out regeneration to obtain glass fibers and fillers in the waste glass fibers. The method can treat waste glass fibers at the normal temperature under normal pressure, realizes glass fiber regeneration and glass fiber eco-friendly use, has simple processes, is free of preprocessing, saves crushing and smashing costs, is free of heating and reduces energy consumption. The regenerated glass fiber or filler is not corroded so that fiber damage is small, the surface is treated cleanly and completely, and high energy consumption and high value-added glass fiber regeneration and glass fiber recycling are realized.

Description

technical field [0001] The invention relates to the field of recycling glass fiber and its products, in particular to a method for regenerating glass fiber at normal temperature and pressure from waste glass fiber or products. The glass fiber surface sizing agent is swollen and stripped, and the glass fiber, filler or its braid is separated, and the recycled glass fiber is obtained after washing and drying. The application fields involve various fields of the national economy, among which electronics, transportation and construction are the most important three application field. Background technique [0002] Glass fiber (GF, glass fiber or fiberglass) is an inorganic non-metallic material with excellent performance. There are many types. Its advantages are good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. Wear resistance is poor. It is made of glass balls or waste glass through high-temperature melting, wire drawing, winding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C25/66B09B3/00
CPCB09B3/00C03C25/66
Inventor 赵剑英潘春呈田丽平倪雪庆刘会陈东亮
Owner SHANDONG UNIV OF TECH
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