DAK Americas W L40B User Manual
Laser+®W (L40B)
#10004
457
polyethylene terephthalate (PET) resin is a copolymer formulated for conversion to
PET bottles by conventional single or two
W (L40B)
mechanical properties, including superior stress crack resistance. It performs exceptionally well in the
manufacture of water bottles where heat up r
W (L40B)
a gentle injection molding process
speeds. A relatively slow crystallization rate enables high injection molding output.
is ideally suited for food packaging applications and is considered in compliance with
the Food and Drug Administration (FDA) Food
Moisture Content (as packaged)
Fines (as packaged, +24 Mesh Size)
Partical Size, Shape (Flat Cylinder)
These values represent the anticipated performance data for these polyester resins and intermediates; they are not intended t
be used as design data. We believe this information is the best currently available on the subject. It is offered
helpful suggestion in the experimentation you may care to undertake along these lines. It is subject to revision as addition
knowledge and experience is gained. DAK Resins makes no guarantee of results and assumes no obligation or liabil
whatsoever in connection with this information. This publication is not a license to operate under, or intended to suggest
CAUTION: Do not use in medical applications involving permanent implantation in the huma
applications, see “DAK Medical Caution Statement”.
Product Information
Gateway Corporate Center, Suite 210
223 Wilmington W Chester Pike• Chadds Ford, PA 19317
7385 • www.dakamericas.com
by injection/stretch blow molding provides optimal barrier and
ate and temperature profile through the wall are important.
for water bottle use by providing a slightly lower intrinsic
proved acetaldehyde (AA)
offers superior heat absorption and processing control, even at
Contact Notification (FCN) 000635
Test Method
0.75±0.02
dL/g
DAK-QAR-SOP-0012
DAK-QAR-SOP-0011
DAK-QAR-SOP-0011
DAK-QAR-SOP-0010
DAK-QAR-SOP-0013
DAK-QAR-SOP-0014
53±5
chips / g
DAK-QAR-SOP-0015
DAK-QAR-SOP-0016
DAK-QAR-SOP-0017
DAK-QAR-SOP-0016
DAK-QAR-SOP-0018
n body. For other medical
polyethylene terephthalate resin
Product Description
Laser+®W (L40B)
-stage processing technology.
Typical Properties
Bi-orientation of Laser+
DAK has engineered Laser+
®
®
viscosity (IV), allowing for
performance. Laser+®W (L40B)
higher blow molding
Certification
Laser+®W (L40B)
polymers.
Sales Specifications
Property
Intrinsic Viscosity
Color L*
Color b*
Acetaldehyde
Chip Size, nominal
Crystallinity
Melting Point, nominal
Bulk Density
, and im
, covering PET
Value Unit
> 78 CIE
-3.0 ± 2.0 CIE
1 max ppm
0.25 max weight %
0.10 max weight %
> 45 %
3x3x2 mm
242 ºC
54.3 lb /ft³
as a possible
infringement of, any existing patents.
DAK Americas LLC
DAK Americas
ISO 9001:2008
1-888-738-2002 • fax: 610-558-
PDS-L40B Rev 11/11
o
al
ity
Laser+®W (L40B)
#10004
457
Proper drying of polyethylene terephthalate (PET) is essential to produce a high quality part (container,
film, etc.) with optimum physical properties. PET is hyg
humid atmospheres, it will absorb moisture. In PET the moisture is not only on the surface but diffuses
slowly through the whole pellet and is firmly held by molecular attraction. Before processing the PET,
moisture must be removed. Carefully controlled drying of all PET is an essential requirement for
optimum processing performance and final product properties. If drying is not carried out properly, to
the known requirements of the type of PET in use, then
The deficiencies will be impossible to remedy by later process changes. These defects arise in the
injection molding or extrusion processes because at PET melt temperature (250°
auses hydrolytic degradation of the PET, almost instantaneously, with the resultant loss in
intrinsic viscosity (IV). Significant drops in IV cause loss of process control and reductions in end
Drying of PET polymer involves the dif
to its surroundings and, subsequently the removal of moisture from the bulk of polymer chips. Moisture
removal can be achieved by heating the polymer chip under dry air or vacuum. In an air
heated dehumidified air flows up through a chip bed and returns to the dehumidifier. The key
requirements for a reliable drying process are:
The ACTUAL chip temperature should achieve between 300° and 340° F
Correctly designed equipment should operate at temperatures up to
40° F measured on entry to the dryer hopper, with an absolute maximum of 370° F to prevent possible
This should not be allowed to rise above
0° F or lower, measure after the desiccant bed. Always check the correct regeneration temperatures
Dehumidified air flow through the chip bed:
PET chip as a minimum requirement, with the airflow at the correct temperature and dew point.
DAK recommends a chip residence time for Laser+
ours and preferably six hours. This is the theoretical drying time, which is calculated by
dividing dryer capacity in lbs. by throughput in lb./hr. Extended periods of high temperature can
adversely affect the polymer processing conditions. In the event of
dry polymer can be stored in the dryer
Product Information
Gateway Corporate Center, Suite 210
223 Wilmington W Chester Pike• Chadds Ford, PA 19317
7385 • www.dakamericas.com
roscopic, meaning that when it is exposed to
deficiencies in process and product will results.
fusion of absorbed moisture from the interior of the polymer chip
34° F and should preferably be
operate at around l cfm of airflow per 1lb/hr of
a stoppage for an extended period,
ir temperature to 240° F (or even
polyethylene terephthalate resin
Material Drying
this
present c
product properties.
Drying temperature:
measured at the dryer exit.
-280° C) any water
drying system,
Dehumidified air temperature:
3
discoloration.
Dehumidified air dew point:
–4
are being used.
Chip residence time (drying time):
than four h
lower).
Most dryers
-hopper by reducing the a
–
®
PET of not less
DAK Americas LLC
DAK Americas
ISO 9001:2008
1-888-738-2002 • fax: 610-558-
PDS-L40B Rev 11/11
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