Method for recycling sheet material coated with a release agent and uses of the thus recycled material

摘要

The present invention concerns a method for treating waste material comprising: —Collecting release coated cellulose or polymeric sheets from producers and end-users thereof in the form of dense, bulky masses, such as rolls and stacks; —Pre-shredding the dense, bulky masses of release coated sheets into smaller, less dense masses in preparation to the following process steps; —Preparing the pre-shredded material by mixing, separating foreign bodies like metals, etc., and feeding it to a primary grinding station (3); —Grinding the materials into small pieces, of the desired size, preferably down to less than 1 mm; —Adding additives selected from flame retardant, hydrophobic material, pesticide and mixtures thereof and mixing them with the recycled material; —Optionally forming a batt or a sheet by a wet process and/or by adding a binder.

主权项

1. A method for treating waste material comprising the following steps:
(a) collecting from producers and end-users thereof, release coated cellulose sheet material or release coated polymeric sheet material comprising a carrier sheet made of cellulose or polymer and a crosslinked release coating applied on at least one face of the carrier sheet, (b) preparing the release coated sheet material collected in step (a) by mixing, separating foreign bodies and feeding said material to a dry-grinding station, (c) in one or several dry-grinding stations, dry-shredding and dry-grinding the materials fed from step (b) into stripes of an average length comprised between 5 and 30 mm, to form a ground material; and (d) optionally adding additives selected from flame retardant, hydrophobic material, pesticide, colorants and mixtures thereof and mixing said additives with the ground material.