SPI Membrane Storage Boxes
Technical details for Styron® 678E clear polystyrene boxes
We present the following technical information about the base plastic used
in the construction of the SPI Membrane Boxes for those who are
contemplating heating to higher temperatures, or exposing the boxes to
environments out of the ordinary, and are interested in knowing something
about how the boxes are likely to respond when subjected to such exposures.
The following information has been provided by the manufacturer of
Styron® 678E, Dow Plastics. No guarantees are given as to
the correctness or accuracy of the following information, but it is
presented only as a guide for out-of-the-ordinary applications.
Naturally, it is up to the user to do the required testing, as only they
can make the final decision as to the suitability of these boxes in a
particular application.
General statement of the plastic:
Styron® 678E is a general purpose polystyrene with high
flow and good toughness, designed primarily for injection molding.
Its main characteristics are a) good toughness, b) easy processability
and c) high flow.
Applications:
Styron® 678E is designed for use either pure or in a mixture
with other easy flowing high impact polymers in injection molding
applications. It imparts an excellent toughness to the finished products,
for example, when used in conjunction with the molding of thin-walled
containers.
Processing:
Styron® 678E is mainly used in injection molding where
strength coupled with short cycle times in a prime requirement. It can be
blended with other Styron polystyrene grades, but is not compatible with
ABS or SAN copolymers.
Physiological data:
If used unmodified and processes in accordance with good manufacturing
practice, Styron® 678E complies with the requirements of
the US FDA, the British Plastics Federation, recommendation V of the German
Bundesgesundheitsamt, par.1 of the Dutch food packaging law, the Italian and
French food law. It is approved for use in contact with food in Austria,
Finland, and Switzerland.
Typical Properties:
The following technical information is meant to represent typical
properties and not a specific specification for a particular batch of
material.
Properties1, 2 Test Method Unit Value
ISO DIN ASTM S.I.
Specific density @23°C 1183 D-792 g/cc 1.05
Bulk density 60 g/cc 0.60
Rockwell hardness, R scale 2039/2 D-785-B 105.0
Ball indentation hardness 2039 53 456 MPa 150.0
Thermal coeff. of lin. exp. 53 572 1/K 8E-05
Thermal conductivity 52 612 W/Km 0.17
Dielectric constant (1 MHz) D-150 2.5
Dissipation factor (1 MHz) D-150 6E-05
Dielectric strength 53 481 kV/mm 135
Melt flow rate (200°C/5 kg) 1133/8 53 735 D-1238/G G/10 min 1
Vicat softening point (120°C/h 1 kg) 306A D-1525/B °C 93
(50°C/h 5 kg) 306B 53 460/B50 °C 86
DTUL, annealed (120°C/h 1.82 MPa) 75A 648 °C 82
(120°C/h 0.46 MPa) 75B 648 °C 86
Tensile strength3 (5 mm/min) 527 D-638 MPa 43
Ultimate tensile elongation3 (5 mm/min) 527 D-638 % 1-3
Flexural modulus3 (3-points bending) 178 D-790/1 MPa 3500
Flexural strength3 (3-points bending) 178 D-790/1 MPa 80
-----------------------------
1 Typical properties, not to be construed as specifications limits
2 Compression molded specimens
3 Injection molded specimens
Notice:
The information and data contained on this page are believed to be correct
and are given in good faith. However, no liability, warranty or guarantee
of final product performance is created by this document. No freedom from
any patent is granted or to be inferred. This document does not constitute
a sales specification and the Dow Sales Contract General Terms and
Conditions continue to apply.
To Ask a Question or Make a Comment
To Place an Order or Request a Quote
Return to:
Tuesday May 13, 2008
© Copyright 2008. By Structure Probe, Inc.
Contacting Structure Probe, Inc.
All rights reserved.
All trademarks and trade names are the property of their respective owners.
Privacy Policy
Worldwide Distributors, Representatives, and Agents
