摘要:
Provided are: a carbon fiber bundle which has a large value of single-fiber fineness and excellent productivity and which, despite this, contains few interlaced single fibers therein and has excellent spreadability; and precursor fibers which are suitable for use in producing the carbon fiber bundle. The precursor fibers are a carbon-fiber-precursor acrylic fiber bundle which comprises a polyacrylonitrile copolymer comprising 95-99 mol % acrylonitrile units and 1-5 mol % hydroxyalkyl (meth)acrylate units and which has a single-fiber fineness of 1.5-5.0 dtex. In the acrylic fiber bundle, the cross-section of each single fiber which is perpendicular to the fiber axis has a shape that has a roundness of 0.9 or less. The roundness is a value determined using equation (1) where S and L are the cross-sectional area and the circumferential length, respectively, of a single fiber which are obtained by examining, with an SEM, the cross-section of the single fiber which is perpendicular to the fiber axis and analyzing the obtained image. Roundness=4pS/L2 (1)
摘要:
Provided are: a polyacrylonitrile-based precursor fiber for the production of a carbon fiber having a large single-fiber fineness, said precursor fiber ensuring high heat stability of a spinning dope and excellent productivity; and a copolymer suitable for the production of said precursor fiber. Also provided are: high-quality carbon fiber bundles which have a large single-fiber fineness and excellent productivity; a process for producing the same; and a process for producing flameproofed fiber bundles suitable for the production of the carbon fiber bundles. A polyacrylonitrile-based copolymer which comprises 93.0 to 99.4 mol % of acrylonitrile units, 0.5 to 4.0 mol % of (meth)acrylamide-based units, and 0.1 to 3.0 mol % of unsaturated carboxylic acid hydroxyalkyl ester units and in which the (meth)acrylamide-based units are (meth)acrylamide units and/or (meth)acrylamide derivative units having a molecular weight of 105 or less; a precursor fiber comprising the copolymer; a process for producing flameproofed fiber bundles which uses precursor fiber bundles consisting of the precursor fiber; carbon fiber bundles; and a process for production thereof.
摘要:
Provided are: a polyacrylonitrile-based precursor fiber for the production of a carbon fiber having a large single-fiber fineness, said precursor fiber ensuring high heat stability of a spinning dope and excellent productivity; and a copolymer suitable for the production of said precursor fiber. Also provided are: high-quality carbon fiber bundles which have a large single-fiber fineness and excellent productivity; a process for producing the same; and a process for producing flameproofed fiber bundles suitable for the production of the carbon fiber bundles. A polyacrylonitrile-based copolymer which comprises 93.0 to 99.4 mol % of acrylonitrile units, 0.5 to 4.0 mol % of (meth)acrylamide-based units, and 0.1 to 3.0 mol % of unsaturated carboxylic acid hydroxyalkyl ester units and in which the (meth)acrylamide-based units are (meth)acrylamide units and/or (meth)acrylamide derivative units having a molecular weight of 105 or less; a precursor fiber comprising the copolymer; a process for producing flameproofed fiber bundles which uses precursor fiber bundles consisting of the precursor fiber; carbon fiber bundles; and a process for production thereof.
摘要:
A vehicle information collection system is disclosed for receiving vehicle information by way of a communication network and storing the vehicle information. The vehicle information collection system comprises: a vehicle information collection device for collecting the vehicle information of a plurality of vehicles from each vehicle by way of the communication network; and a point-issuing device that is connected to the vehicle information collection device by way of the communication network for conferring points to the vehicles according to the vehicle information. The vehicle information management unit collects and stores vehicle information at any time, and when a prescribed condition has been met, transmits vehicle information that has been stored and information indicating its own vehicle to the vehicle information collection device by way of the on-board communication unit and the network. The vehicle information collection device, upon receiving vehicle information from a vehicle, both classifies and stores the received information and transmits the information that indicates the vehicle and the vehicle information that has been received from the vehicle to a point-issuing device by way of the network. The point-issuing device, upon receiving these items of information, issues points in a number that corresponds to the amount and/or the category and/or the value of vehicle information and transmits to the vehicle information that indicates the number of issued points.
摘要:
To provide a novel compound having both a surface-activating ability and a polymerization controlling ability.A compound represented by the following general formula (1) or (2): wherein, R1 and R3 are an organic group having the hydrophile-lipophile balance (HLB) determined by Griffin's method of 3 or more. The definitions of R1, R2, R3, R4, Z, p and q are described in the Description.
摘要:
A vehicle information collection system is disclosed for receiving vehicle information by way of a communication network and storing the vehicle information. The vehicle information collection system comprises: a vehicle information collection device for collecting the vehicle information of a plurality of vehicles from each vehicle by way of the communication network; and a point-issuing device that is connected to the vehicle information collection device by way of the communication network for conferring points to the vehicles according to the vehicle information. The vehicle information management unit collects and stores vehicle information at any time, and when a prescribed condition has been met, transmits vehicle information that has been stored and information indicating its own vehicle to the vehicle information collection device by way of the on-board communication unit and the network. The vehicle information collection device, upon receiving vehicle information from a vehicle, both classifies and stores the received information and transmits the information that indicates the vehicle and the vehicle information that has been received from the vehicle to a point-issuing device by way of the network. The point-issuing device, upon receiving these items of information, issues points in a number that corresponds to the amount and/or the category and/or the value of vehicle information and transmits to the vehicle information that indicates the number of issued points.
摘要:
To provide a novel compound having both a surface-activating ability and a polymerization controlling ability.A compound represented by the following general formula (1) or (2): wherein, R1 and R3 are an organic group having the hydrophile-lipophile balance (HLB) determined by Griffin's method of 3 or more. The definitions of R1, R2, R3, R4, Z, p and q are described in the Description.