Preparation method of continuous polymerization melt direct spinning low melting point polyester composite fiber
A low-melting point polyester and composite fiber technology, applied in fiber processing, stretch spinning, conjugated synthetic polymer artificial filament, etc., can solve problems such as low production efficiency, high cost, and difficulty in product quality assurance, and achieve Good molding, improved production efficiency, and guaranteed stability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0039] 1. A slurry formulated with terephthalic acid, isophthalic acid, ethylene glycol and antimony-based catalysts. The molar ratio of acid to alcohol in the slurry is 1:1.05;
[0040] 2. The obtained slurry is continuously and uniformly transported to the esterification system composed of the first vertical esterification tank and the second vertical esterification tank for esterification reaction. The reaction temperature of the first esterification tank is 265 °C and the reaction pressure is is 200kPa, the reaction temperature of the second esterification tank is 270°C, and the reaction pressure is 120kPa. When the esterification rate of the esterified product reaches 96%, the terephthalic acid / isophthalic acid / ethylene glycol ternary oligomer is continuously and stably pumped out of the esterification tank through the oligomer pump;
[0041] 3. The oligomer obtained in step 2 is mixed with the polyether component Polyethylene Glycol 100 injected into the oligomer pipelin...
Embodiment 2
[0049] 1. A slurry formulated with terephthalic acid, succinic acid, butanediol and a titanium-based catalyst. The molar ratio of acid to alcohol in the slurry is 1:1.4;
[0050] 2. The obtained slurry is continuously and uniformly transported to an esterification system composed of vertical esterification tanks for esterification reaction, with a reaction temperature of 230° C. and a reaction pressure of 300 kPa. When the esterification rate of the esterified product reaches 96%, the terephthalic acid / succinic acid / butanediol ternary oligomer is continuously and stably pumped out from the esterification tank by the oligomer pump;
[0051] 3. The oligomer obtained in step 2 is mixed with the polyether component polytetramethylene glycol 1000 that is injected into the oligomer pipeline through a tubular static mixer arranged on the pipeline and then enters a homogeneous kettle for transesterification; wherein , the reaction temperature of the homogeneous kettle is 230°C, and th...
Embodiment 3
[0059] 1. A slurry formulated with terephthalic acid, adipic acid, propylene glycol and a titanium-based catalyst. The molar ratio of acid to alcohol in the slurry is 1:1.4;
[0060]2. The obtained slurry is continuously and uniformly transported to the esterification system consisting of a vertical first esterification tank and a horizontal second esterification tank for esterification reaction. The reaction temperature of the first esterification tank is 250°C and the reaction pressure is is 200kPa, the reaction temperature of the second esterification tank is 255°C, and the reaction pressure is 100kPa. When the esterification rate of the esterified product reaches 95%, the terephthalic acid / adipic acid / propylene glycol ternary oligomer is continuously and stably pumped out from the second esterification kettle by the oligomer pump;
[0061] 3. The oligomer prepared in step 2 and the polyether component polypropylene glycol 5000 injected into the oligomer pipeline are mixed ...
PUM
Property | Measurement | Unit |
---|---|---|
melting point | aaaaa | aaaaa |
length | aaaaa | aaaaa |
melting point | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com