PATENT CLAIM ANALYSIS

Application Number: 16322950
Application Type: Utility
Filing Date: 2019-02
Publication Date: 2019-05
Patent Classification: ["525", "437000"]

Abstract:
A different shrinkage composite yarn and preparation method. The modified polyester is spun with a porous spinneret to produce a different shrinkage composite yarn, and the spinneret holes on the porous spinneret are arranged in an elliptical arrangement. The different shrinkage composite yarn is obtained by winding modified polyester POY yarn and FDY yarn, network recombining, and coiling them. 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 CV value of breaking strength is ≤4.0%, the CV value of elongation at break is ≤8.0%, the CV value of coefficient of variation of coiling shrinkage is ≤8.0%.

Claim (Index 3):
The method of  claim 2 , wherein, in the method for preparing the modified polyester the first slurry 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: than that then the terephthalic acid glycol ester is obtained;\n the second slurry in the stet (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 theoretic; then the ethylene terephthalate is obtained; \n in step (3) the stirring and mixing is performed for 15-20 minutes under the action of the catalyst and the stabilizer, and 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 the temperature of 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; \n the main spinning process parameters of the different shrinkage composite yarn are as follows: \n a spinning temperature is 280-300\u00b0 C.; \n a wind temperature is 20-22\u00b0 C.; \n a network pressure of joint stock is 3.5-4.5 bar. \n GR1 speed is 800-1000 m/min; \n SR1 speed is 3000-4200 m/min: \n GR2 speed is 3000-4000 m/min; \n HT1 temperature is 90-115\u00b0 C.; \n HT2 temperature is 130-140\u00b0 C.; \n winding speed is 3000-4000 m/min.

Metadata:
- Claim Count in Document: 18.0
- Percentile: 99.0
- Lexical Diversity: 2.11111
- Patent Class: 525.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['16322952', '16322948', '15744869', '13579940', '15744841']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7978230970435541
- 35 USC 102 Novelty (BERT): 0.576353224223203
- Combined Prediction Score: 0.775676109761519
- Mean Citation Score: 344.208746
- Max Citation Score: 485.1724
- Similarity Product: 480.5893915943145

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