DAK Americas W L40A User Manual
Laser+®W (L40A)
#10004457
polyethylene terephthalate (PET) resin is a copolymer formulated for conversion to
PET bottles by conventional single or two
W (L40A)
mechanical properties, including superior stress crack resistance. It performs exceptionally well in the
manufacture of water bottles where heat up r
W (L40A)
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
and Food Branch (HPFB) file KS 05103107 for PET polymers.
Moisture Content (aspackaged)
Fines (as packaged, +24 MeshSize)
Partical Size,Shape (FlatCylinder)
es represent the anticipated performance data for these polyester resins and intermediates; they are not intended to
be used as design data. We believe this information is the best currently available on the subject. It is offered as a poss
uggestion in the experimentation you may care to undertake along these lines. It is subject to revision as additional
knowledge and experience is gained. DAK Resins makes no guarantee of results and assumes no obligation or liability
tion 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 human body. For other medic
applications, see “DAK Medical Caution Statement”.
Product Information
eway 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
,
Test Method
DAK-QAR-SOP-0012
DAK-QAR-SOP-0011
DAK-QAR-SOP-0011
DAK-QAR-SOP-0010
DAK-QAR-SOP-0013
DAK-QAR-SOP-0014
DAK-QAR-SOP-0015
DAK-QAR-SOP-0016
DAK-QAR-SOP-0017
DAK-QAR-SOP-0016
DAK-QAR-SOP-0018
polyethylene terephthalate resin
Product Description
Laser+®W (L40A)
-stage processing technology.
Typical Properties
Bi-orientation of Laser+
DAK has engineered Laser+
®
®
viscosity (IV), allowing for
performance. Laser+®W (L40A)
higher blow molding
Certification
Laser+®W (L40A)
Health Products
Sales Specifications
Property
Intrinsic Viscosity
Color L*
Color b*
Acetaldehyde
Chip Size, nominal
Crystallinity
Melting Point, nominal
Bulk Density
These valu
helpful s
, and im
Contact Notification (FCN) 000635
Value Unit
0.75 ± 0.02 dL/g
> 78 CIE
-3.0 ± 2.0 CIE
1 max ppm
0.25 max weight%
0.10 max weight%
53 ± 5 chips / g
> 45 %
3x3x2 mm
242 ºC
54.3 lb / ft³
and Health Canada
ible
whatsoever in connec
infringement of, any existing patents.
DAK Americas LLC
Gat
DAK Americas
ISO 9001:2008
1-888-738-2002 • fax: 610-558-
PDS-L40A 120313KH
al
Laser+®W (L40A)
#10004457
Proper drying of polyethylene terephthalate (PET) is essential to produce a high quality part (container,
film, etc.) with optimum physical properties. PET is hygroscopic, meaning that w
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,
d. 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 deficiencies in process
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°
tion 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 diffusion of absorbed moist
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 drying system,
ehumidified 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 b
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+
than four hours and preferably six
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 a stoppage for an exten
dry polymer can be stored in the dryer
Product Information
eway Corporate Center, Suite 210
223 Wilmington W Chester Pike• Chadds Ford, PA 19317
7385 • www.dakamericas.com
and product will results.
ure from the interior of the polymer chip
34° F and should preferably be
of airflow per 1lb/hr of
hours. This is the theoretical drying time, which is calculated by
ir temperature to 240° F (or even
polyethylene terephthalate resin
Material Drying
this moisture must be remove
present causes hydrolytic degrada
product properties.
heated d
Drying temperature:
measured at the dryer exit.
hen it is exposed to
-280° C) any water
Dehumidified air temperature:
3
discoloration.
Dehumidified air dew point:
–4
are being used.
Chip residence time (drying time):
lower).
e allowed to rise above –
Most dryers operate at around l cfm
-hopper by reducing the a
Gat
®
PET of not less
ded period,
DAK Americas LLC
DAK Americas
ISO 9001:2008
1-888-738-2002 • fax: 610-558-
PDS-L40A 120313KH
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