INDUSTRIAL SCALE-UP OF BIO-BASED INSULATING PANEL PRODUCTION.

Author(s): V. Colson, T. Le Cunff, O. Jadeau, C. Lanos
Paper category: Proceedings
Book title: Proceedings of the 2nd International Conference
on Bio-Based Building Materials
Editor(s): Sofiane AMZIANE, Mohammed SONEBI and Karine CHARLET
ISBN:
e-ISBN: 978-2-35158-192-6
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 691-698
Total Pages: 8
Language : English

Abstract: ISOBIO Project aims to produce highly insulating panels from bio-resources. This study focuses
on the constrains associated to the production of panel at the industrial scale using thermal
treatment. Three types of processes are considered (wet processes for rigid panels, dry
processes for rigid or flexible panels and Stramit process®) and the limits of each process are
identified according to the formulation characteristics (moisture content, binder type and
content), binding mechanisms (melting, thermosetting or drying), process parameters (pressure,
time and temperature) and targeted material properties (density and thickness). Cavac
Biomatériaux industrial oven is used to study the dry and wet processes for the production of
rigid panels. The temperature distribution in the material thickness was recorded. Difficulties to
reach sufficient temperature level for high panel thicknesses or for high water content are
observed. As a consequence, an excessively long drying time is needed to produce rigid panel
using the wet process. Only small panel thicknesses are possible options. The addition of
thermosetting binder is an alternative way to reduce water content and processing time. Rigid
panel are easily produced using the dry manufacturing process and a hydraulic press with hot
plates. Various tests are performed adjusting panel characteristics and formulations. Interesting
results are obtained with hemp shiv bonded with a bio-based thermosetting binder. The binder
content ranged from 5% to 23% and the targeted density from 155 to 245 kg/m3. Mechanical
characterization shows that the binder formulation, proportion, water content and panel density
are crucial parameters to be adjusted to optimize panel manufacturing process and properties.
The dry process appears more versatile than wet process and leads to lower processing time. It
allows the production of hemp shiv insulation panels within a large range of density and having
compressive and flexural strength reaching 1 and 1.7 MPa respectively.

Online publication :2017
Publication type :full_text
Public price (Euros) : 0.00