CHIMAR has developed a process that allows using up to 20% of waste boards (raw, laminated or veneered) in MDF manufacturing without loss of mechanical properties and production capacity. Process allows using in-house rejects as well as waste from customers.The process does not require major investments in the manufacturing unit. A hammer mill is used to break down the waste boards. The resulting chips (depending on the feedstock, they may have to be sieved) should be washed and thoroughly mixed with fresh chips, at a controlled weight ratio. From here they follow the normal production process. A mix of chemicals (recycling agents) prepared according to CHIMAR technology is added in the digester through a hole.
Industrial production has shown no drop in mechanical properties, swelling or formaldehyde emission increase. Production speed is not changed either.
Savings will vary from plant to plant, depending on fuel self-sufficiency and waste availability.
Main advantages of this process are:
- It is continuous
- Produces no effluents
- Disintegrates melamine paper in laminated boards
- Causes no drop in properties or production capacity
- Requires only a minor investment
- Final product has a better machinability, better surface for lacquering, better dimensional stability and better swelling
