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1. 发明公开

EP3760768A1 FIBER PRODUCTION METHOD AND CARBON FIBER PRODUCTION METHOD 审中-公开
公开(公告)号：EP3760768A1
公开(公告)日：2021-01-06
申请号：EP18908160.7
申请日：2018-11-02
申请人： Toray Industries, Inc.
发明人： NAGASAKA, Takuya , ISHIO, Keiichi , FURUKAWA, Naoyuki
IPC分类号： D01D5/06 , D01F6/18 , D01F9/22
摘要： A method of producing a fiber, the method including discharge, from a spinneret 1, a spinning dope solution containing a fiber-forming polymer dissolved in a solvent, once allowing the solution to run in air, and then guiding the solution into the liquid of a coagulation bath 4 to allow coagulation, wherein a gas-phase portion formed in a vertically downward direction from a discharge surface of the spinneret 1 to the liquid surface of the coagulation bath 4 has an air flow rate per unit time (Af) which satisfies, in relation to the amount of the solvent in the spinning dope solution per unit time (As) in the gas-phase-portion volume (Vh), the relational expression 0.0008 m 3 ≤ Af/(As/Vh) ≤ 0.0015 m 3 , and the hourly average of the absolute humidity at each of four points in an outer periphery of the spinneret in the gas-phase portion is not more than 20 g/m 3 .
A method of producing a fiber, which, in dry-jet wet spinning, suppresses occurrence of dew condensation in the spinneret, and reduces deterioration of the appearance caused by winding on rollers in the subsequent process or by fuzzing or yarn break in the stretching process, to enable significant improvement of the productivity and the appearance as a whole, is provided.

2. 发明公开

EP3705610A1 CARBON FIBER BUNDLE AND METHOD FOR PRODUCING SAME 审中-公开
公开(公告)号：EP3705610A1
公开(公告)日：2020-09-09
申请号：EP18874618.4
申请日：2018-10-16
申请人： Toray Industries, Inc.
发明人： SAITO, Daisuke , ISHIO, Keiichi , IHARA, Koki
IPC分类号： D01F9/22
摘要： The purpose of the present invention is to provide: a carbon fiber bundle which exhibits excellent filament shape stability when forming a composite material, and from which it is possible to obtain a carbon fiber composite material which exhibits high tensile strength; and a method for producing the same. To achieve this purpose, the provided carbon fiber bundle exhibits a tensile elasticity as a resin-impregnated strand of 265-300 GPa, a tensile strength as a resin-impregnated strand of 6.0 GPa or more, a knot strength of 820 N/mm 2 or more, a filament number of 30,000 or more, and an average tear distance of 600-850 mm, wherein the rate of change in filament width is 8% or less when the carbon fiber bundle is unraveled under the conditions stipulated in the description, and there are four or fewer sections per 1,000 m which exhibit a filament width equal to or less than 75% of the average filament width when the carbon fiber bundle is unraveled under the conditions stipulated in the description.

3. 发明授权

EP3290549B1 METHOD FOR MANUFACTURING SPUN THREAD BUNDLE, AND METHOD FOR MANUFACTURING CARBON FIBER IN WHICH RESULTING SPUN THREAD BUNDLE IS USED 有权
公开(公告)号：EP3290549B1
公开(公告)日：2019-10-16
申请号：EP16792570.0
申请日：2016-04-27
申请人： Toray Industries, Inc.
发明人： ISHIO, Keiichi , AIZU, Koichi , NAKANO, Masaki
IPC分类号： D01F9/32 , B65H51/015 , D02G3/28 , D01F9/22 , B65H51/08

4. 发明公开

EP3604636A1 FIBER PRODUCTION METHOD AND CARBON FIBER PRODUCTION METHOD 有权
公开(公告)号：EP3604636A1
公开(公告)日：2020-02-05
申请号：EP18778353.5
申请日：2018-03-02
申请人： Toray Industries, Inc.
发明人： NAGASAKA, Takuya , ISHIO, Keiichi , YANO, Fumiya , FURUKAWA, Naoyuki , NAGANO, Seiji , MATSUBARA, Yuma
IPC分类号： D01F6/18 , D01D5/06
摘要： A method of producing a fiber, the method including extruding, from a spinneret 1, a spinning dope solution containing a fiber-forming polymer dissolved in a solvent, once allowing the solution to run in air, and then guiding the solution into the liquid of a coagulation bath 4 to allow coagulation, wherein a gas-phase portion formed in a vertically downward direction from an extrusion surface of the spinneret 1 to the liquid surface of the coagulation bath 4 has a unidirectional air flow, and has an air flow rate per unit time (Af) which satisfies, in relation to the amount of the solvent in the spinning dope solution per unit time (As) in the gas-phase-portion volume (Vh), the relational expression 0.0008 m 3 ≤ Af/(As/Vh) ≤ 0.0015 m 3 . A method of producing a fiber, which, in dry-jet wet spinning, suppresses occurrence of dew condensation in the spinneret, and reduces deterioration of the appearance caused by winding on rollers in the subsequent process or by fuzzing or yarn break in the stretching process, to enable significant improvement of the productivity and the appearance as a whole, is provided.

5. 发明公开

EP3290549A1 METHOD FOR MANUFACTURING SPUN THREAD BUNDLE, AND METHOD FOR MANUFACTURING CARBON FIBER IN WHICH RESULTING SPUN THREAD BUNDLE IS USED 有权
标题翻译：用于制造捻线束的方法以及用于制造碳纤维的方法，其中使用了所产生的捻线束
公开(公告)号：EP3290549A1
公开(公告)日：2018-03-07
申请号：EP16792570.0
申请日：2016-04-27
申请人： Toray Industries, Inc.
发明人： ISHIO, Keiichi , AIZU, Koichi , NAKANO, Masaki
IPC分类号： D01F9/32 , B65H51/015
摘要： Provided is a method for manufacturing a combined yarn bundle including the steps of bringing the two or more carbon fiber precursor yarns which travel in approximately parallel to one another into contact with a first roller at a wrap angle of 20° or more; then splitting the two or more carbon fiber precursor yarns into two to be brought into contact with a pair of second rollers, so that the carbon fiber precursor yarns are rotated approximately 90° between the first roller and the pair of second rollers; next, sequentially bringing the carbon fiber precursor yarns delivered from one second roller into contact with a third front roller and a third rear roller, and also bringing the carbon fiber precursor yarns delivered from the other second roller into contact with the third rear roller without bringing them into contact with the third front roller, so that these carbon fiber precursor yarns are combined on the third rear roller; and thereafter, bringing the carbon fiber precursor yarns delivered from the third rear roller into contact with a fourth roller to obtain a combined yarn bundle, so that a ratio of a distance L between axes of the first roller and of the pair of second rollers to a yarn width W of the carbon fiber precursor yarn on the first roller, L/W, is 18 or more and a tension of the combined yarn bundle after delivered from the fourth roller is 0.11 cN/dtex or more.
摘要翻译：本发明提供一种复合纱线束的制造方法，其特征在于，包括使大致彼此平行地行进的两根以上的碳纤维前体纱线以20°以上的包角与第一辊接触的工序; 然后将所述两根或更多根碳纤维前体纱线分成两根以与一对第二辊子接触，使得所述碳纤维前体纱线在所述第一辊子和所述一对第二辊子之间旋转大约90°; 接着，使从一个第二辊输送的碳纤维前体纱线与第三前辊和第三后辊依次接触，并且使从另一个第二辊输送的碳纤维前体纱线与第三后辊接触而不带来使它们与第三前辊接触，从而使这些碳纤维前体纱在第三后辊上结合; 然后，使从第三后辊输出的碳纤维前体纱线与第四辊接触以获得组合纱线束，使得第一辊和一对第二辊的轴线之间的距离L与所述第一辊上的所述碳纤维前体纱的纱线宽度W为18以上，从所述第四辊输送的所述组合纱线束的张力为0.11cN / dtex以上。

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