Recovery of fibre from laminated carton boards

Details Recovery of fibre from laminated carton boards Recovery of fibre from laminated carton boards

D - Textiles, Paper

21

C

9/1

D21C 3/00 (2006.01) D21B 1/32 (2006.01) D21C 5/02 (2006.01)

Patent

CA 1099858

ABSTRACT A method for recovering cellulosic fibres from thermoplastic-fibreboard laminates such as fruit juice and milk cartons. The method involves heating the laminate in a pulping liquor to a temperature equal to or greater than the softening point of the thermoplastic material. This is followed by cooling to a temperature below the softening point and defibration by mechanical or explosive means. The method results in a mixture of thermoplastic fragments and cellulosic fibres which can be readily separated by conventional means. Pressure may be applied to the laminate/liquor system to accelerate the process.

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