PATENT CLAIM ANALYSIS

Application Number: 16322952
Application Type: Utility
Filing Date: 2019-02
Publication Date: 2019-06
Patent Classification: ["525", "437000"]

Abstract:
A porous ultra-soft ultra-fine denier polyester fiber and preparation method. The modified polyester is spun with a porous spinneret to produce the porous ultra-soft ultra-fine denier polyester fiber, and the spinneret holes on the porous spinneret are arranged in an elliptical arrangement. The porous ultra-soft ultra-fine denier polyester fiber is obtained by metering, extruding, cooling, oiling and high-speed winding the modified polyester chips. The preparation method of modified polyester is as follows: terephthalic acid reacts with ethylene glycol to produce ethylene terephthalate. The modified polyester is obtained by the reaction of terephthalic acid with branched diol. The fiber of the invention has good properties and the deviation rate of fiber density. The deviation rate of fiber density is ≤0.5%, the CV value of breaking strength is ≤4.0%, the CV value of elongation at break is ≤8.0%, the CV value of yarn unevenness is ≤2.0%.

Claim (Index 3):
The method of  claim 2 , wherein, in the method for preparing the modified polyester\n the first slimy in the step (1) is added to a first reactor for carrying out the first esterification reaction; the first esterification reaction is carried out under a pressurized nitrogen environment, and the pressure is in a range of a normal pressure to 0.3 MPa, and a temperature is 180-240\u00b0 C.; the first esterification reaction ends when a water distillation amount in the first esterification reaction reaches at least 90% of a first theoretical value; then the terephthalic acid glycol ester is obtained; the second slurry in the step (2) is added into a second reactor for carrying out the second esterification reaction; the second esterification reaction is carried out under a pressurized nitrogen environment, and the pressure is in a range of normal pressure to 0.3 MPa, and a temperature is 250-260 \u00b0 C.; the second esterification reaction ends when a water distillation amount in the second esterification reaction reaches at least 90% of a second theoretical; then the ethylene terephthalate is obtained; in step (3) the stirring and mixing is performed for 15-20 minutes under the action of the catalyst and the stabilizer, and the negative pressure; in the polycondensation reaction under the condition of the low-vacuum stage, the, pressure is smoothly pumped from the normal pressure to an absolute pressure under 500 Pa, a temperature is controlled at 260-270\u00b0 C., and a reaction time is 30-50 minutes; then turn to the high vacuum stage, the polycondensation reaction continues and the reaction pressure is reduced to an absolute pressure of less than 100 Pa, and the reaction temperature is controlled at 275 to 280\u00b0 C., and the reaction time is 50 to 90 minutes in order to obtain the modified polyester; main spinning process parameters of the porous ultra-soft ultra-fine denier polyester fiber are as follows: an extruding temperature is 290-295\u00b0 C.; a wind temperature is 20-25\u00b0 C.; HT1 temperature is 75-95\u00b0 C.; HT2 temperature is 120-130\u00b0 C.: a winding speed is 3000-4000 m/min.

Metadata:
- Claim Count in Document: 18.0
- Percentile: 99.0
- Lexical Diversity: 2.23288
- Patent Class: 525.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['16322950', '16322948', '15744841', '13579940', '10190040']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7736107651787849
- 35 USC 102 Novelty (BERT): 0.5842204773829355
- Combined Prediction Score: 0.7546717363991999
- Mean Citation Score: 289.84174999999993
- Max Citation Score: 499.35254
- Similarity Product: 494.3899736421919

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test