PATENT CLAIM ANALYSIS

Application Number: 15744869
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-07
Patent Classification: ["428", "370000"]

Abstract:
A low chromatic aberration polyester different-shrinkage composite yarn is made of polyester POY yarn and polyester FDY composite yarn. The polyester POY yarn and polyester FDY yarn is obtained by spinning the polyester solution, the rupture strength of the low color polyester different-shrinkage composite yarn is ≥1.9 cN/dtex, the elongation at break is 30.0±5.0%, the crimp shrinkage is 2.50±3.0%, the network degree is 20±5/m, the color difference ΔE is less than 0.200. In the invention, the magnesium ethylene glycol is relatively mild, the thermal degradation coefficient is small, the oligomers in the polymerization process is reduced, and the oligomers in the dissolution process are further reduced, so that the appearance of stains and streaks reduces during the dyeing and post-processing heat setting of the polyester fiber, which ensures the fiber's leveling and rubbing fastness.

Claim (Index 5):
The method according to  claim 4 , further comprising:\n preparing magnesium ethylene glycol, adding ethylene glycol is in a single-compartment electrolytic cell, wherein magnesium chloride is a supporting electrolyte, an anode is comprised of magnesium, a cathode is graphite; operating the single-compartment electrolytic cell is at 50 to 60 for 10 to 12 h under DC, at an initial voltage of 6 to 10V, a cathodic current density of 150 to 200 mA; after the electrolysis, a white suspension liquid is obtained followed by removing the electrodes, decompression filtration and washing by anhydrous alcohol, the obtain the magnesium ethylene glycol after drying; performing the esterification and polycondensation to prepare polyester, using terephthalic acid and ethylene glycol as raw materials for the esterification reaction, adding a polyether-inhibitor to obtain esterification products after the esterification reaction; wherein the esterification reaction is performed at a pressure controlled in the scale of atmospheric pressure to 0.3 MPa, and a temperature controlled between 250 to 260; the esterification reaction is completed after an amount of distillate water in the esterification reaction reaches at least at 90% of a theoretical value; performing a condensation reaction, including a low vacuum stage and a high vacuum stage of the condensation reaction, wherein, in the low vacuum stage of the condensation reaction, adding a catalyst and a stabilizer into a product obtained from the esterification reaction; wherein the condensation reaction is performed under a negative pressure, where the pressure is decreased gradually from the atmospheric pressure to a pressure lower than the absolute pressure 500 Pa, and a temperature of the condensation reaction is controlled between 260 to 270; wherein the reaction is carried out for 30 to 50 mins, wherein the catalyst is the mixture of magnesium ethylene glycol and antimony ethylene glycol; in the high vacuum stage of the condensation reaction, continuously pumping vacuum after the low vacumm stage of the condensation reaction to an absolute pressure lower than 100 Pa, the low vacuum stage of the condensation reaction temperature is controlled between 275 to 280\u00b0 C., and the low vacuum stage of the condensation reaction is carried out for 50 to 90 mins; then preparing the polyester section through granulation; scouring and washing the polyester section with water and a rinsing agent at 120 to 130\u00b0 C. and 0.2 to 0.3 MPa for 3 to 5 h followed by washing with water; wherein spinning parameters include a spinning temperature of 280 to 300\u00b0 C., an air temperature of 20 to 22\u00b0 C., a joint stock network pressure of 3.5 to 4.5 bar, a GR1 speed of 800 to 1000 m/min, an SR1 speed of 3000 to 4200 m/min, a GR2 speed of 3000 to 4000 m/min, a HT1 temperature of 90 to 115\u00b0 C., a HT2 temperature of 130 to 140\u00b0 C. and a winding speed of 3000 to 4000 m/min.

Metadata:
- Claim Count in Document: 14.0
- Percentile: 86.0
- Lexical Diversity: 1.8875
- Patent Class: 428.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15744841', '16322950', '15744867', '16322952', '16322948']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8976697484035729
- 35 USC 102 Novelty (BERT): 0.5573964364553432
- Combined Prediction Score: 0.86364241720875
- Mean Citation Score: 352.674232
- Max Citation Score: 422.83783
- Similarity Product: 368.0727567781675

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test