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| "Soarnol®"
does not merely extend the shelf life of food products.
Its outstanding oxygen barrier properties are used
in non-food product fields as well. Floor heating
pipes that were once made primarily of metal are
now increasingly being replaced by plastics. However,
polybutene(PB), cross-linked polyethylene(XPE) and
other monolayer pipes easily allow oxygen to escape
through them, and hot water containing oxygen corrodes
the metal parts in pumps and boilers. |
| To resolve this
problem, a grade of "Soarnol®" (with its excellent
oxygen barrier properties) for pipe use was developed
that includes resistance to resin deterioration
under hot water conditions so as to comply with
the German DIN 4726 standard (which calls for hot
water pipes to function for 50 years with no degradation
in performance). |
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| This grade of "Soarnol®"
is a multilayer version with the other resins noted
above, blocking out oxygen and preventing metal
part corrosion to achieve long-term durability of
50 years. Thus "Soarnol®" functions as a behind-the-scenes
force protecting the pipes below the floor level. |
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| Compared with
other materials |
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Standard
of
DIN4726 |
Soarnol® |
cross-linked polyethylene
(XPE) |
Polypropylene
(PP) |
polybutene
(PB) |
| OTR[mg/l
day] |
Less
than
0.1% |
0.03 |
3.2 |
6.5 |
6.5 |
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| "Soarnol®"
products of 29mol%, 32mol%, 44mol%, etc.,
have already seen actual application to
pipes. |
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