Recovery of fibre from laminated carton boards

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

1977-11-11

1980-02-12

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162 5, 162 8, 162 55, 162 21, D21B 132, D21B 136

Patent

active

041882598

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.

REFERENCES:
Tapp, vol. 58, No. 5, pp. 71-73, May 1975.

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