Patents by Inventor Jae-hyeuk Jeong
Jae-hyeuk Jeong 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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Patent number: 11773250Abstract: The invention relates to a thermoplastic elastomer with an excellent adhesion to cross-linked ethylene propylene diene rubber (EPDM) or rubber mixtures containing cross-linked EPDM. The invention also relates to the use of the thermoplastic elastomer according to the invention for producing a composite material with cross-linked EPDM or rubber mixtures containing cross-linked EPDM, as well as an article that comprises a thermoplastic elastomer according to the invention and cross-linked EPDM or rubber mixtures containing cross-linked EPDM. The present invention also relates to a process for producing a thermoplastic elastomer.Type: GrantFiled: April 23, 2021Date of Patent: October 3, 2023Assignee: Kraiburg TPE Corp.Inventors: Jae Hyeuk Jeong, Sehyun Kim, Yaw Boateng
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Publication number: 20220340738Abstract: The invention relates to a thermoplastic elastomer with an excellent adhesion to cross-linked ethylene propylene diene rubber (EPDM) or rubber mixtures containing cross-linked EPDM. The invention also relates to the use of the thermoplastic elastomer according to the invention for producing a composite material with cross-linked EPDM or rubber mixtures containing cross-linked EPDM, as well as an article that comprises a thermoplastic elastomer according to the invention and cross-linked EPDM or rubber mixtures containing cross-linked EPDM. The present invention also relates to a process for producing a thermoplastic elastomer.Type: ApplicationFiled: April 23, 2021Publication date: October 27, 2022Inventors: Jae Hyeuk Jeong, Sehyun Kim, Yaw Boateng
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Patent number: 9818947Abstract: A semiconductive roller to stably generate high-quality images for a long period of time by efficiently inhibiting migration of free epichlorohydrin (ECH) component to a surface of the semiconductive roller includes an elastic layer formed of a semiconductive rubber composition including about 50 to about 70 parts by weight of a base rubber and about 30 to about 50 parts by weight of a hydrin rubber. An extracted amount of the ECH component from the elastic layer is about 2% by volume or less, wherein the extracted amount is determined based on a reduced amount of chlorine (Cl) intensity measured using X-ray fluorescence (XRF) analysis performed before and after extraction of the ECH component from the elastic layer using tetrahydrofuran (THF).Type: GrantFiled: January 30, 2014Date of Patent: November 14, 2017Assignee: S-PRINTING SOLUTION CO., LTD.Inventors: Kwang-ho Kang, Jae-hyeuk Jeong, Jung-ik Choi
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Publication number: 20170089069Abstract: The present invention relates to a radiant barrier sheet and a wood panel comprising same. The radiant barrier sheet comprises a polymer film, a first radiant reflective layer disposed on the polymer film, and a first protective layer disposed on the first radiant reflective layer, wherein the radiant barrier sheet has through-holes configured to penetrate through the polymer film and the first radiant reflective layer, the number of the through-holes ranges from 1 to 10 per 1 cm2, a planar area of the through-holes ranges from about 20,000 ?m2 to about 200,000 ?m2 per 1 cm2, and a diameter of the through-hole ranges from about 80 ?m to about 300 ?m.Type: ApplicationFiled: September 23, 2016Publication date: March 30, 2017Applicants: SKC INC., SKC CO., LTD.Inventors: Mary KLIMA, Eugene JUNG, Teahoung JEONG, Jae Hyeuk JEONG, Dae Yong SHIN
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Publication number: 20150087488Abstract: A semiconductive roller to stably generate high-quality images for a long period of time by efficiently inhibiting migration of free epichlorohydrin (ECH) component to a surface of the semiconductive roller includes an elastic layer formed of a semiconductive rubber composition including about 50 to about 70 parts by weight of a base rubber and about 30 to about 50 parts by weight of a hydrin rubber. An extracted amount of the ECH component from the elastic layer is about 2% by volume or less, wherein the extracted amount is determined based on a reduced amount of chlorine (Cl) intensity measured using X-ray fluorescence (XRF) analysis performed before and after extraction of the ECH component from the elastic layer using tetrahydrofuran (THF).Type: ApplicationFiled: January 30, 2014Publication date: March 26, 2015Applicant: Samsung Electronics Co., LtdInventors: Kwang-ho KANG, Jae-hyeuk JEONG, Jung-ik CHOI
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Patent number: 8858412Abstract: A pickup roller includes a supporting layer and a pickup layer, which includes a base surrounding the outer perimeter of the supporting layer and a plurality of particles which are distributed throughout the base and have a different hardness than a hardness of the base.Type: GrantFiled: June 30, 2010Date of Patent: October 14, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-hyeuk Jeong, Cheong-jin Jang, Min-chan Kim, Ae-kyung Choi
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Patent number: 8722300Abstract: Disclosed are an electrophotographic toner and a method of preparing the same. The electrophotographic toner includes latex; a colorant; and a releasing agent. The absolute value of a differential value of complex viscosity with respect to temperature, ( ? ? ? ? T ? ) ? ? ? ( log 10 ? ? ) / ? T ? of the electrophotographic toner in a temperature range of 100° C.-160° C. is in a range of about 0.03 to about 0.06, and complex viscosity (?) of the electrophotographic toner at 140° C. is in a range of about 1.0×102 Pa·s to about 6.0×102 Pa·s.Type: GrantFiled: June 22, 2009Date of Patent: May 13, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Hae-Ree Joo, Jae-Hyeuk Jeong, Kyeong Pang
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Patent number: 8546054Abstract: An electrophotographic toner includes a binder resin, a colorant, and a releasing agent, wherein the electrophotographic toner has a complex viscosity (?) of 4e2 Pa·s to 8e3 Pa·s at a temperature range of 120 to 160° C. and an angular velocity range of 1.6 to 10 rad/s, a rate of change of the complex viscosity of 165 to 185 Pa·s/° C. at 1.6 rad/s, and 70 to 80 Pa·s/° C. at 10 rad/s within the temperature range, a stress relaxation of 1.0 e3 to 4.5 e4 Pa at a relaxation time of 0.05 to 0.3 seconds under a temperature range of 120 to 160° C., and a rate of change of the stress relaxation (?G/?T) of 785 to 1000 Pa/° C. at 0.05 seconds and 190 to 215 Pa/° C. at 0.3 seconds within the temperature range above.Type: GrantFiled: September 29, 2008Date of Patent: October 1, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-hyeuk Jeong, Duck-hee Lee, Deuck-woo Jang, Jung-ik Choi, Soon-cheol Jeong, Hae-ree Joo
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Patent number: 8492061Abstract: The disclosure provides electrophotographic toner and a method of preparing the same. The toner includes a latex, a colorant, and a releasing agent, wherein the toner has a weight-average molecular weight of about 50,000 to about 80,000; a complex viscosity of about 1×103 to about 5×104 (Pa·s) at a temperature ranging from about 100° C. to about 140° C.; and a storage modulus Pa (dG?) to a loss modulus Pa (dG?) (dG?/dG?) ratio of about 1.10 to about 1.25.Type: GrantFiled: November 4, 2009Date of Patent: July 23, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-Hyeuk Jeong, Kyeong Pang, Jung-Ik Choi, Soon-Cheol Jeong, Hong-Chul Shin
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Patent number: 8043782Abstract: A toner for electrophotography is provided including a binder resin, a coloring agent, a charge controlling agent, and a releasing agent, wherein when the temperature of the toner is in the range from a temperature 40° C. lower than a fixing temperature of the toner to a temperature 10° C. lower than the fixing temperature of the toner, the D Log ?*/DT absolute value is 0.02 or more, when the temperature of the toner is in the range from a temperature 10° C. lower than the fixing temperature of the toner to a temperature 10° C. higher than the fixing temperature of the toner, the D Log ?*/DT absolute value is 0.005 or less, and the complex viscosity (?*) of the toner at a fixing temperature and an angular velocity of a fixing heat roller is in the range from about 5.0×101 Pa·s to 1.0×102 Pa·s. The toner has excellent fixing properties so that the quality of an image can be stabilized, and cause less contamination.Type: GrantFiled: January 18, 2008Date of Patent: October 25, 2011Assignee: Samsung Electronics Co., Ltd.Inventor: Jae-hyeuk Jeong
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Publication number: 20110158726Abstract: A pickup roller includes a supporting layer and a pickup layer, which includes a base surrounding the outer perimeter of the supporting layer and a plurality of particles which are distributed throughout the base and have a different hardness than a hardness of the base.Type: ApplicationFiled: June 30, 2010Publication date: June 30, 2011Applicant: Samsung Electronics Co., Ltd.Inventors: Jae-hyeuk JEONG, Cheong-jin Jang, Min-chan Kim, Ae-kyung Choi
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Patent number: 7935470Abstract: A toner for electrophotography is provided including a binder resin, a colorant, a charge control agent, and a release agent, wherein a glass transition temperature (Tg) is over 55° C., a molecular weight distribution (MWD) is in the range of about 4.5 to 5.5 when a weight average molecular weight is in the range of about 45,000 to 55,000, and a compression elastic modulus is about 750 MPa or higher at room temperature. Mechanical properties of toner can be obtained at room temperature by controlling rheological properties of toner. The developing properties and fixing properties of toner for electrophotography can be improved by lowering viscosity at a high temperature, and thus image quality can be stabilized.Type: GrantFiled: November 8, 2007Date of Patent: May 3, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-hyeuk Jeong, Kyung-yol Yon, Min-young Cheong, Kyeong Pang, Yo-da Shin, Hae-ree Joo
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Patent number: 7927776Abstract: A toner for electrophotography is provided that includes a binder resin, a colorant, a charge control agent, and a releasing agent, wherein the toner has a complex viscosity (?) of about 4.0×101 Pa·s to about 1.6×103 Pa·s at a temperature ranging from about 40° C. lower than a toner fixing temperature to about 10° C. higher than the toner fixing temperature and has a specified activation energy of 15 to 85 KJ/mol. By defining viscosity dependency in a linear modulus region of a toner and comprehensively defining thermal and rheological properties with respect to fixing conditions, a fixing phenomenon can be generalized and the quality of a toner can be evaluated.Type: GrantFiled: July 31, 2007Date of Patent: April 19, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-hyeuk Jeong, Hae-ree Joo, Kyung-yol Yon
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Publication number: 20100167194Abstract: The disclosure provides electrophotographic toner and a method of preparing the same. The toner includes a latex, a colorant, and a releasing agent, wherein the toner has a weight-average molecular weight of about 50,000 to about 80,000; a complex viscosity of about 1×103 to about 5×104 (Pa·s) at a temperature ranging from about 100° C. to about 140° C.; and a storage modulus Pa (dG?) to a loss modulus Pa (dG?) (dG?/dG?) ratio of about 1.10 to about 1.25.Type: ApplicationFiled: November 4, 2009Publication date: July 1, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jae-Hyeuk JEONG, Kyeong Pang, Jung-Ik Choi, Soon-Cheol Jeong, Hong-Chul Shin
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Patent number: 7711303Abstract: A variable tension type belt fusing unit includes a main roller, a pair of belt driving rollers which is disposed near the outer circumferential surface of the main roller and is pressurized towards the main roller, and a fusing belt having a nip portion and a non-tension portion. At least one of the pair of belt driving rollers is independently and temporarily driven to apply or release a tension to the nip portion. In a driving method of the variable tension type belt fusing unit, the tension is applied to the nip portion of the fusing belt when the variable tension type belt fusing unit is prepared for an operation, the fusing belt travels while maintaining the tension during the operation of the variable tension type belt fusing unit, and the tension is released when the operation is completed.Type: GrantFiled: June 27, 2006Date of Patent: May 4, 2010Assignee: Samsung Electronics Co., Ltd.Inventor: Jae-hyeuk Jeong
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Publication number: 20090324296Abstract: Disclosed are an electrophotographic toner and a method of preparing the same. The electrophotographic toner includes latex; a colorant; and a releasing agent. The absolute value of a differential value of complex viscosity with respect to temperature, ( ? ? ? ? T ? ) of the electrophotographic toner in a temperature range of 100° C.-160° C. is in a range of about 0.03 to about 0.06, and complex viscosity (?) of the electrophotographic toner at 140° C. is in a range of about 1.0×102 Pa·s to about 6.0×102 Pa·s.Type: ApplicationFiled: June 22, 2009Publication date: December 31, 2009Inventors: HAE-REE JOO, JAE-HYEUK JEONG, KYEONG PANG
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Publication number: 20090214965Abstract: An electrophotographic toner includes a binder resin, a colorant, and a releasing agent, wherein the electrophotographic toner has a complex viscosity (?) of 4e2 Pa·s to 8e3 Pa·s at a temperature range of 120 to 160° C. and an angular velocity range of 1.6 to 10 rad/s, a rate of change of the complex viscosity of 165 to 185 Pa·s/° C. at 1.6 rad/s, and 70 to 80 Pa·s/° C. at 10 rad/s within the temperature range, a stress relaxation of 1.0 e3 to 4.5 e4 Pa at a relaxation time of 0.05 to 0.3 seconds under a temperature range of 120 to 160° C., and a rate of change of the stress relaxation (?G/?T) of 785 to 1000 Pa/° C. at 0.05 seconds and 190 to 215 Pa/° C. at 0.3 seconds within the temperature range above.Type: ApplicationFiled: September 29, 2008Publication date: August 27, 2009Inventors: Jae-hyeuk Jeong, Duck-hee Lee, Deuck-woo Jang, Jung-ik Choi, Soon-cheol Jeong, Hae-ree Joo
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Publication number: 20090111043Abstract: A toner for electrophotography includes a polyester-based resin, a colorant, a charge controlling agent, and a releasing agent, wherein the toner does not substantially comprise of an organic tin, and generates about 100 ppm or less of volatile organic compounds at a temperature of about 150 to about 200° C.Type: ApplicationFiled: August 19, 2008Publication date: April 30, 2009Applicant: Samsung Electronics Co., Ltd.Inventors: Hae-ree Joo, Jae-hyeuk Jeong, Kyung-yol Yon, Deuck-woo Jang
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Patent number: 7447473Abstract: A fixing device for fixing a toner image onto a recording medium, and an image forming apparatus having the same are provided. The fixing device includes a fixing roller heated by a heating source, and a pressing unit disposed opposite the fixing roller to bias a recording medium towards the fixing roller so that the recording medium contacts the fixing roller. The pressing unit has a movable support member, a pressing member mounted at the support member to face the fixing roller, a pressing belt rotatably disposed around the support member and the pressing member and biased by the pressing member to form a nip with the fixing roller, a driving roller for rotating the pressing belt, and a resilience applying member for biasing at least one of the support member and the driving roller toward the fixing roller. Accordingly, the pressing unit basically expands the width of the fixing nip to improve the image fixing capability.Type: GrantFiled: April 26, 2006Date of Patent: November 4, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-hyeuk Jeong, Dong-jin Seol
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Publication number: 20080182195Abstract: A toner for electrophotography is provided including a binder resin, a colorant, a charge control agent, and a release agent, wherein a glass transition temperature (Tg) is over 55° C., a molecular weight distribution (MWD) is in the range of about 4.5 to 5.5 when a weight average molecular weight is in the range of about 45,000 to 55,000, and a compression elastic modulus is about 750 MPa or higher at room temperature. Mechanical properties of toner can be obtained at room temperature by controlling rheological properties of toner. The developing properties and fixing properties of toner for electrophotography can be improved by lowering viscosity at a high temperature, and thus image quality can be stabilized.Type: ApplicationFiled: November 8, 2007Publication date: July 31, 2008Inventors: Jae-hyeuk Jeong, Kyung-yol Yon, Min-young Cheong, Kyeong Pang, Yo-da Shin, Hae-ree Joo