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 2):
A method of preparing the different shrinkage composite yarn of  claim 1 , wherein the modified polyester is spun from a porous spinneret to produce the different shrinkage composite yarn, and an arrangement of spinneret holes in the porous spinneret is an elliptical arrangement; the elliptical arrangement means that the centers of the spinning holes of the spinneret are located on the concentric ellipses, the concentric ellipses are a series of ellipses, the long axes of all the ellipses are collinear, and the short axes of all the ellipses are collinear; the method comprising:\n preparing a modified polyester POY yarn by metering, squeezing, cooling, oiling and winding the modified polyester, and preparing a modified polyester FDY yarn by metering, extrusion, cooling, oiling, drawing, heat setting and winding the modified polyester chips; combining the modified polyester POY yarn and the modified polyester FDY yarn as a network structure to form the different shrinkage composite yarn; wherein, a method for preparing the modified polyester comprises (1) preparation of terephthalic acid glycol ester: mixing terephthalic acid and the branched hexanediol to a first slurry, and carrying out a first esterification reaction under a catalytic action of concentrated sulfuric acid to obtain the terephthalic acid glycol ester; (2) preparation of ethylene terephthalate: mixing the terephthalic acid and ethylene glycol to a second slurry, carrying out a second esterification reaction to obtain the ethylene terephthalate; (3) preparation of modified polyester: after the second esterification reaction in the step (2) is completed, adding the terephthalic acid glycol ester prepared in the step (1), stirring and mixing, performing a polycondensation reaction under the action of the catalyst and the stabilizer, and under a condition of a negative pressure; first in a low vacuum stage and then in a high vacuum stage to obtain the modified polyester.

Metadata:
- Claim Count in Document: 18.0
- Percentile: 99.0
- Lexical Diversity: 2.11111
- Patent Class: 525.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16322952', '16322948', '15744869', '13579940', '15744841']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7798405915233637
- 35 USC 102 Novelty (BERT): 0.5679995751317557
- Combined Prediction Score: 0.758656489884203
- Mean Citation Score: 344.208746
- Max Citation Score: 485.1724
- Similarity Product: 446.2177539445877

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