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（1）高弾力性
（2）高耐熱性
（3）130°Cでポリエステルといっしょに染めることができます
（4）丸編み経編みに適しています
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 乾式スパンデックス実績表 |
|
|
Client
|
Country
|
Spinning Process |
Scope |
Completion |
| A Company |
Japan |
Dry (F) |
EPC |
1988 |
| A Company |
Japan |
Dry (F) |
EPC |
1994 |
| B Company |
Taiwan |
Dry (F) |
EPSV |
1994 |
| B Company |
Taiwan |
Dry (F) |
EPSV |
1998 |
| A Company |
Japan |
Dry (F) |
EPC |
2001 |
| C Company |
China |
Dry (F) |
EPSV |
2001 |
| D Company |
China |
Dry (F) |
EPSV |
2001 |
| B Company |
Taiwan |
Dry (F) |
EPSV |
2001 |
| E Company |
China |
Dry (F) |
EPSV |
2003 |
| F Company |
China |
Dry (F) |
EPSV |
2003 |
| G Company |
China |
Dry (F) |
EPSV |
2004 |
| G Company |
China |
Dry (F) |
EPSV |
2004 |
|
|
Note
E:Engineering (エンジニアリング)
P:Procurement (機器調達)
C:Construction (建設)
SV:Construction Commissioning Supervision (建設試運転監督) |
|
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| プロセスの説明 |
|
| (1) 重合 |
| |
The raw materials PTMG (polyoxytetramethylene
glycol) and MDI (diphenylmethane diisocyanate) are polymerized in
the prepolymer reactor to form prepolymer. The prepolymer is supplied
to polymer reactor and solved with DMAC (dimethyl acetamide). Additives
are supplied to prepolymer solution and polymerized at the controlled
temperature. |
| |
|
(2) |
紡糸
・安定したドープ紡糸
・スムーズな溶剤蒸発
・丸い糸断面の形成
|
|
 |
| |
The dope is precisely metered and discharged
by gear pump mounted on individual spinning tube and extruded through
nozzles into the spinning tube.
In spinning tubes, extruded dope streams are dried in high temperature
inert gas flow vaporizing the solvent, and form spandex fibers.
Solvent vapor and vent gas are fed to scrubber and absorbed to solution
for recovery. |
| |
| (3) 巻取り |
| |
Spandex multi-fibers are gathered and
twisted in the air jet nozzle, and wound on paper tubes with applying
finishing oil to avoid sticking and obtain smoothness. |
| |
|
| (4) 溶剤回収（回収率98％） |
| ＜回収溶剤の標準的成分＞ |
| Solvent
DMAC (dimethyl acetamide) |
|
| Water
content : |
Less than 200 ppm |
| Acetic
acid : |
Less than 100 ppm |
| Total
amine: |
Less than 10 ppm |
| Electric
conductivity: |
Lessthan15μs/cm
(20%solution) |
| PH : |
4.5-6.0 (20% solution) |
|
|
|
| |
Solvent solution is fed
to solvent recovery process and separated by distillation into pure
solvent and water.
Recovered solvent is recycled to polymerization process.
Usual recovery rate of DMAC is over 98%. |
|
| |
| (5) 標準的糸の物性 |
| |
| Item |
Specification |
| 20d |
40d |
70d |
100d |
Tenacity (g/d)
|
0.9〜1.0 |
0.9〜1.0 |
0.7 |
0.7〜0.9 |
| Elongation (%) |
≧450 |
≧450 |
≧450 |
≧480 |
Heat resistance*1
1) Tenacity
retaining (%)
2) Strain
retaining (%) |
≧70
≦55 |
≧70
≦55 |
≧70
≦55 |
≧70
≦55 |
|
*1 After heat treatment test for 45seconds under 100% stretched in 170℃ |
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| プロセスブロックフロー |
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