| To date,
biodegradable polymers of commercial interest are a class of
aliphatic polyesters derived from either biomass or crude oil.
It is therefore not surprising that Bepex particle
process technology for aromatic saturated polyesters has found
applications in emerging biodegradable polymer technologies.
The new biodegradable polymers tend to be slow to crystallize and easily
agglomerate when the amorphous pellets are heated.
Versatility of our lines as well as the diversity of what
we are capable of supplying has helped us find technically
and economically feasible solutions to the needs of the biodegradable
polymer producer.
We design and build our own equipment, and constantly work
to improve existing designs while developing new ones altogether
in order to meet our customer's unique requirements.
The applications of particular interest to the biodegradable
polymer producer are given below:
Crystallizing/Drying
This step is required to improve processiblility and product
quality during extrusion spinning textile fiber, packaging
film and injection molding bottles. Bepex offers unique equipment
and process technology solutions which are well proven, reliable
and cost effective in this application. Process capacities
can range from 25 kg/hr to 25,000 kg/hr.
Solid State Polymerizing
Solid State Polymerizing (SSP) consists of a series of processing steps including holding
the chips at reaction temperatures and time periods to achieve
the required increase in molecular weight in a reactor. Bepex
offers specially designed reactors that provide plug-flow
material handling combined with uniform gas distribution that
is unmatched in the industry.
Dedusting/Cooling
The quality of the finished products such as fiber, film and
bottles can be significantly impaired by the presence of dust
in polymer chips. This dust is removed prior to packaging
the crystallized or solid state polymerized chips. Bepex offers
an efficient deduster which also functions as a chip cooler.
Capacity ranges from 25 kg/hr to 30,000 kg/hr are available.
Gas Purification
Drying as well as solid state polymerizing polyester chips
requires hot gas low in particulate matter, moisture and volatile
organics. Since nitrogen is used in many instances, purifying
and recycling the process gas is essential from the viewpoint
of process economics and environmental protection. Bepex offers
three types of gas purifications systems with capacities ranging
from 500 Nm3/hr to 15,000 Nm3/hr. |
