Patents by Inventor Damao Yang
Damao Yang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240052532Abstract: A low-thermal-shrinkage polyester industrial yarn and preparation method thereof are provided. The low-thermal-shrinkage polyester industrial yarn is prepared by spinning and winding a modified polyester after solid-state polycondensation to increase viscosity. The preparation method of the modified polyester includes: after uniformly mixing terephthalic acid, ethylene glycol, 2,5-pyridinedicarboxylic acid and copper chloride, successively performing an esterification reaction and a polycondensation reaction to obtain the modified polyester. The polyester segments of the prepared low-thermal-shrinkage polyester industrial yarn comprises a terephthalic acid segment, an ethylene glycol segment and a 2,5-pyridinedicarboxylic acid segment, and 2,5-pyridinedicarboxylic acid segments of different polyester segments are coordinated by Cu2+. The molar ratio of the terephthalic acid segment to the 2,5-pyridinedicarboxylic acid segment is 1:(0.03-0.05).Type: ApplicationFiled: August 25, 2021Publication date: February 15, 2024Applicant: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.Inventors: Rui CHEN, Lili WANG, Shanshui WANG, Damao YANG, Ye ZHANG, Xiaohua SUN, Fangming TANG, Tong WANG
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Patent number: 11174575Abstract: A type of high-modulus-low-shrinkage activated PET industrial yarn and preparing method thereof are disclosed. The preparing method is to manufacture filament from a modified polyester, which is the product of the esterification and the successive polycondensation reactions of evenly mixed terephthalic acid, ethylene glycol and tert-butyl branched heptanediol, through a series of processes composed of viscosity enhancing by solid state polycondensation, melting, metering, extruding, cooling, oiling, stretching, heat setting, relaxation heat-treating, oiling with activation oil, winding and pre-activation treatment. The relaxation heat-treating indicates passing the modified polyester yarns through a space with a certain temperature within 200-220° C. under a proper relaxation state; and the proper relaxation state means a 3.0-5.0% of overfeed for the winding.Type: GrantFiled: October 28, 2019Date of Patent: November 16, 2021Assignee: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.Inventors: Fangming Tang, Shanshui Wang, Damao Yang
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Publication number: 20210230776Abstract: A type of high-modulus-low-shrinkage activated PET industrial yarn and preparing method thereof are disclosed. The preparing method is to manufacture filament from a modified polyester, which is the product of the esterification and the successive polycondensation reactions of evenly mixed terephthalic acid, ethylene glycol and tert-butyl branched heptanediol, through a series of processes composed of viscosity enhancing by solid state polycondensation, melting, metering, extruding, cooling, oiling, stretching, heat setting, relaxation heat-treating, oiling with activation oil, winding and pre-activation treatment. The relaxation heat-treating indicates passing the modified polyester yarns through a space with a certain temperature within 200-220° C. under a proper relaxation state; and the proper relaxation state means a 3.0-5.0% of overfeed for the winding.Type: ApplicationFiled: October 28, 2019Publication date: July 29, 2021Applicant: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.Inventors: Fangming TANG, Shanshui WANG, Damao YANG
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Patent number: 11035056Abstract: A method for improving the quality of a polyester industrial yarn is provided. First, in the cooling process of preparing a polyester industrial yarn prepared by polyester spinning, the longitudinal height is kept unchanged, and the cross-sectional area of the slow cooling chamber is enlarged. The chamber maintains the surface temperature of the spinneret by means of heat preservation, and then uses an oil agent containing 67.30-85.58 wt % crown ether in the oiling process of polyester industrial yarn prepared by polyester spinning. Enlarging the cross-sectional area of the slow-cooling chamber refers to the cross section of the slow cooling chamber is changed from a circular shape to a rectangular shape while keeping the spinneret connected to the slow cooling chamber unchanged. The cleaning cycle of the spinneret is prolonged by 35-45%, the full package rate of polyester industrial yarn is larger than 99%.Type: GrantFiled: July 27, 2018Date of Patent: June 15, 2021Assignee: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.Inventors: Hongwei Fan, Damao Yang, Ye Zhang, Fangming Tang, Huirong Zhao
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Patent number: 10815333Abstract: A high-modulus low-shrinkage polyester industrial yarn obtained by subjecting a polyester to dissolution, washing and solid state polycondensation followed by spinning. The high-modulus low-shrinkage polyester industrial yarn has a dry heat shrinkage rate of 2.0±0.25% under test conditions of 177° C.×10 min×0.05 cN/dtex. The average value of the crystal volume Vc of the high-modulus low-shrinkage polyester industrial yarn is larger than 230 nm3. The high-modulus low-shrinkage polyester industrial yarn has a fiber modulus of ?100 cN/dtex. The polycondensation catalyst consists of magnesium ethylene glycol and antimony ethylene glycol, which has a small thermal degradation coefficient.Type: GrantFiled: June 12, 2016Date of Patent: October 27, 2020Assignee: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.Inventors: Hongwei Fan, Wengang Li, Yanfang Wang, Lili Wang, Damao Yang, Fangming Tang, Lixin Yin, Guangkun Song
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Patent number: 10801132Abstract: A high uniformity coloured polyester industrial yarn and preparation method. The raw material of the high-uniformity coloured polyester industrial yard is the modified polyester composed of terephthalic acid segment, an ethylene glycol segment and a branched diol. The high-uniformity coloured polyester industrial yarn is prepared by esterification reaction of terephthalic acid with a branched diol using concentrated sulfuric acid as catalyst to obtain terephthalic acid glycol ester. Terephthalic acid and ethylene glycol are formulated to carry out esterification reaction to obtain ethylene terephthalate. Finally, stir and mix the two materials and carry out the polycondensation reaction in the low vacuum stage and the high vacuum stage under the action of the catalyst and the stabilizer to obtain modified polyester. Measure the modified polyester and add black masterbatch.Type: GrantFiled: June 26, 2017Date of Patent: October 13, 2020Assignee: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.Inventors: Hongwei Fan, Lili Wang, Xiaobing Fan, Damao Yang, Guangkun Song, Huirong Zhao, Shanshui Wang
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Publication number: 20200263325Abstract: A method for improving the quality of a polyester industrial yarn is provided. First, in the cooling process of preparing a polyester industrial yarn prepared by polyester spinning, the longitudinal height is kept unchanged, and the cross-sectional area of the slow cooling chamber is enlarged. The chamber maintains the surface temperature of the spinneret by means of heat preservation, and then uses an oil agent containing 67.30-85.58 wt % crown ether in the oiling process of polyester industrial yarn prepared by polyester spinning. Enlarging the cross-sectional area of the slow-cooling chamber refers to the cross section of the slow cooling chamber is changed from a circular shape to a rectangular shape while keeping the spinneret connected to the slow cooling chamber unchanged. The cleaning cycle of the spinneret is prolonged by 35-45%, the full package rate of polyester industrial yarn is larger than 99%.Type: ApplicationFiled: July 27, 2018Publication date: August 20, 2020Applicant: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.Inventors: Hongwei FAN, Damao YANG, Ye ZHANG, Fangming TANG, Huirong ZHAO
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Publication number: 20200199788Abstract: A high uniformity coloured polyester industrial yarn and preparation method. The raw material of the high-uniformity coloured polyester industrial yarn is the modified polyester composed of terephthalic acid segment, an ethylene glycol segment and a branched diol. The high-uniformity coloured polyester industrial yarn is prepared by esterification reaction of terephthalic acid with a branched diol using concentrated sulfuric acid as catalyst to obtain terephthalic acid glycol ester. Terephthalic acid and ethylene glycol are formulated to carry out esterification reaction to obtain ethylene terephthalate. Finally, stir and mix the two materials and carry out the polycondensation reaction in the low vacuum stage and the high vacuum stage under the action of the catalyst and the stabilizer to obtain modified polyester. Measure the modified polyester and add black masterbatch.Type: ApplicationFiled: June 26, 2017Publication date: June 25, 2020Applicant: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.Inventors: Hongwei FAN, Lili WANG, Xiaobing FAN, Damao YANG, Guangkun SONG, Huirong ZHAO, Shanshui WANG
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Publication number: 20180201725Abstract: A high-modulus low-shrinkage polyester industrial yarn obtained by subjecting a polyester to dissolution, washing and solid state polycondensation followed by spinning. The high-modulus low-shrinkage polyester industrial yarn has a dry heat shrinkage rate of 2.0±0.25% under test conditions of 177° C.×10 min×0.05 cN/dtex. The average value of the crystal volume VC of the high-modulus low-shrinkage polyester industrial yarn is larger than 230 mm3. The high-modulus low-shrinkage polyester industrial yarn has a fiber modulus of ?100 cN/dtex. The polycondensation catalyst consists of magnesium ethylene glycol and antimony ethylene glycol, which has a small thermal degradation coefficient.Type: ApplicationFiled: June 12, 2016Publication date: July 19, 2018Applicant: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.Inventors: Hongwei Fan, Wengang LI, Yanfang WANG, Lili WANG, Damao Yang, Fangming TANG, Lixin YIN, Guangkun SONG