HOLDEN HN 2355 EPDM MODIFIED POLYPROPYLENE
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HOLDEN HN 2355 Document Information:
Title
EPDM MODIFIED POLYPROPYLENE
Holden Limited
Publication Date:
Apr 1, 2007
Scope:
This specification covers thermoplastic elastomers of the TPV
(Thermoplastic Vulcanizate) type to ASTM D5538, or more
specifically Highly Crosslinked Thermoplastic Vulcanizates
(HCTPV's) to ASTM D6338. They consist of vulcanised (crosslinked)
EPDM rubber particles (circa 1 micron) dispersed in a polypropylene
continuous phase. The hardness range is achieved by adjusting the
content of the soft EPDM as well as oil-extension of the EPDM.
The material is supplied in compounded form suitable for
injection moulding, extrusion and blow moulding operations where
parts having good flexibility and a high degree of weathering
resistance are required. A varying degree of oil resistance is
provided, ranging from very limited at the soft end of the range to
very good for the harder grades.
Grades are available where further enhancement of UV resistance
is required, particularly for exterior applications. These are
identified with a "U" suffix in the approved materials database and
are not listed separately in the property tables. In principle,
technology is applicable for U-suffix materials for all HN2355
types, but in some instances may not be readily commercially
available.
Note:
To convert between a HN 1914 type and a HN 2355 type, refer to
section 11.
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