Cellulose wadding in Tunisia
Technical solutions , growing market, the cellulose wadding is an insulating material from newsprint wastes that are not distributed, crushed and misoriented. It is based on four techniques Made since the 1930s in the United States and Canada, cellulose wadding is an alternative to mineral fibres, not posing a health risk.
It is presented in bulk or, since 2008-2009 in Europe, in the form of semi-rigid panels. Its thermal qualities (it can achieve high thermal performance, with an R of 7 to 8), its thermal phase-shift Capacity (9 to 12 h) and its manufacturing process make it an insulating material with one of the best technical quality ratios, Ecological and cost.
A good thermal Resistance
Breathable, the cellulose wadding absorbs up to 30% of the moisture. Stabilized by incorporation of adjuvants (boron * salt), it is resistant to insects, fireproof, and antifungal.
The cellulose wadding benefits from a good thermal inertia with a thermal conductivity coefficient of 0.038 to 0.043 W/M. K, when in bulk. And 0.039 in the form of panels.
On the phonic level, it allows an acoustic reduction of 20 to 30 decibels.
These performances vary depending on the mode of installation: blowing, injection, wet projection, or panels.
Its density depends on the mode of application. It can vary between 30 kg/m3 and 60 kg/m3, an estimated settlement rate of 10 to 20% depending on the thickness applied (25 to 40 cm) over 10 years. Its durability can reach over fifty years.
Actually the cost of buying a blowing machine oscillates between 4 500 and 10 000 euros.
Note : Boron salt is a natural product extracted from open pit quarries. Repellent against xylophagous insects, it prevents the formation of fungi and makes rot wadding.