elastomultiester - elastoester filament

[bronx]

hello,

are both elastomultiester and elastoester same thing ?

Are they spun from blend or are they bicomponent ?

I hear it's Teijin technology .

Thanks in advance for any information

[john.s...@aspenresearch.com]

>From http://www.fibersource.com/f-tutor/eastoester.htm

"Elastoester Fiber:

Current U.S. Elastoester Fiber Producers: (Elastoester is not produced
in the United States. The only producer is Teijin Ltd., Japan).
Federal Trade Commission Definition for Elastoester Fiber: Elastoester
is an official FTC generic fiber type defined as: At least 50% by
weight aliphatic polyether and at least 35% by weight polyester."

Meanwhile, over in Europe,
http://www.intertek-labtest.com/en/display.aspx?file_id=2172 states:

"Two amendments to EU Directives have been newly published.
2006/3/EC* amends Annexes I and II of Directive 96/74/EC on textile
names. It adds details for a new
permitted generic fibre, ("elastomultiester") to the list of
permitted generic fibre names.
2006/2/EC** amends Annexe II of Directive 96/73/EC on certain methods
for the quantitative analysis of
binary textile fibre mixtures. It defines uniform test methods for
"polylactide" and "elastomultiester".
EEA member states have until January 2007 to comply with these
Directives
This means that 96/74/EC has now been amended a total of three times.
The previous two amendments
were 2004/34/EC, which added "polylactide" as a new permitted fibre
name; and 97/37/EC, which added
"cashgora", "aramid", "polyimide" and "lyocell" as new
permitted fibre names.
----------------------------------------------------------------------------
The new fibre, elastomultiester, is defined in the Directive as:-
Fibre formed by interaction of two or more chemically distinct linear
macromolecules in two or more distinct phases (of which none exceeds
85% by mass) which contains ester groups as dominant functional unit
(at least 85%) and which, after suitable treatment when stretched to
one and a half times its original length and released, recovers rapidly
and substantially to its initial length.
Put simply, it is a bicomponent fibre, based on polyesters, which will
stretch up to 50% and recover."

John
Aspen Research, - www.aspenresearch.com
"Turning Questions into Answers"

Opinions expressed herein are my own and may not represent those of my
employer.