US 2024/0326113 A1 · GLASS FIBER PRODUCT CONTAINING RECYCLED GLASS FIBERS AND PROCESS FOR RECYCLING GLASS FIBER PRODUCTS

Abstract

Subject of the invention is a method for recycling a glass fiber product waste to obtain recycled glass fibers. By using the waste glass mat recycling method of the invention a complete separation of the glass fibers from the binder or any other bonded precipitations is achieved. The glass fibers regained by the method are undamaged glass fibers having preserved their original geometry and mechanical performance. Surprisingly the recycled glass fibers have a surface that is very smooth, plain and wave less. A further subject of the invention is glass fiber product comprising glass fibers and at least one binder is provided, wherein the glass fibers contain at least 2% by weight of recycled glass fibers and up to 98% by weight of new glass fibers.

Claims17

Dependent claims

A method for recycling a glass fiber product to obtain recycled glass fibers comprising the steps of

a. providing glass fiber waste products containing glass fibers and at least one binder,
b. mechanically treating the glass fiber product by compacting or partitioning,
c. extracting/removing the binder by subjecting the mechanically treated glass fiber product to solvolysis with a glycol as a solvent, wherein the solvent is selected from triethylene glycol, propylene glyocol, and ethylene glycol at temperatures between 150° C. and 260° C. for an exposure time between 2 and 30 min,
d. separating the glass fibers from the solvent by filtering,
e. cooling the glass fibers,
f. washing the cooled glass fibers in clean water and
g. drying the glass fibers after washing.

4 more elements

Dependencies are inferred from the claim text.

Glass fiber product containing recycled glass fibers and process for recycling glass fiber products

Life of this patent

Glass fiber product containing recycled glass fibers and process for recycling glass fiber products

Life of this patent

Abstract

Claims17