摘要:
An air gun apparatus which permits stable, fine spinning and is capable of discharging fine filaments at a certain degree of dispersion and affording a non-woven fabric of uniform shape is provided. The air gun includes an air nozzle and an accelerator tube. The air nozzle has a filament inlet and outlet. The filaments are discharged from the filament outlet while being pulled by compressed air. The accelerator tube is formed at a specific diameter to length ratio and is connected to the air nozzle in the filament discharging direction. The non-woven fabric producing apparatus is provided with a guide tube and a separator nozzle, with an air flow rate regulator being disposed between the guide tube and the separator nozzle. The air flow rate regulator has an exhaust port for exhausting to the exterior a portion of the compressed air which is used for carrying the filaments.
摘要:
Optically active 2-hydroxy-4-phenyl-3-butenoic acid can be obtained by treating 2-oxo-4-phenyl-3-butenoic acid with an optionally treated microorganism capable of asymmetrically reducing the 2-oxo-4-phenyl-3-butenoic acid into (R)-2-hydroxy-4-phenyl-3-butenoic acid or (S)-2-hydroxy-4-phenyl-3-butenoic acid to thereby asymmetrically reduce the same into (R)-2-hydroxy-4-phenyl-3-butenoic acid or (S)-2-hydroxy-4-phenyl-3-butenoic acid.
摘要:
Nonwoven fabrics formed, in spun-bonding process, of crimped bi-component composite filaments composed of (A) a first component composed of (a) 3 to 40% by weight of a propylene/ethylene random copolymer having a melting point, determined from DSC main peaks of 110.degree. to 150.degree. C. and a melt flow rate [ASTM D-1238 (L)] of not more than 15 g/10 minutes and (b) 97 to 60% by weight of polyethylene having a melt flow rate [ASTM-D-1238 (E)] of at least 15 g/10 minutes, and (B) a second component comprising crystalline polypropylene having a melt flow rate [ASTM D-1238 (L)] of at least 10 g/10 min. as a main component, have a soft feel and are suitable for use as, e.g., disposable bed sheets and liners for diapers.
摘要:
An emboss roll according to the present invention is capable of assuredly performing an embossing work without any risk of shaving a surface of nonwoven fabrics and forming pin holes when used to emboss nonwoven fabrics for the purpose of prevention of filament shavings to be adhered to products. This emboss roll having an outer surface thereof provided with embossing projections wherein all of the top end corners thereof are cut so as to be a surface. As a result of cutting the top end corners of the embossing projections, nonwoven fabrics can be protected from being cut by the corner portions or forming pin holes during the embossing work.
摘要:
Disclosed are a very soft polyolefin spunbonded nonwoven fabric and its production method. The polyolefin spunbonded nonwoven fabric according to the present invention is defined as (A) being formed of continuous polyolefin fibers having a fineness of 0.5 to 3 denier, (B) having basic weight between 30 g/m.sup.2 and 15 g/m.sup.2, and (C) having .sqroot.S.sub.MD .times.S.sub.TD of 2.5 g or below, wherein S.sub.MD and S.sub.TD are respectively the softnesses in the machine and transverse directions as measured by a handle-O-meter. The method of producing a strip of very soft polyolefin nonwoven fabric by directing polyolefin continuous fibers in a fixed direction, comprises the steps of: orienting the axes of the continuous fibers in the direction in which the continuous fibers are fed so as to form a web having a warp orientation factor (the maximum tensile strength in the direction in which the continuous fibers are fed, i.e., in a machine direction/the maximum tensile strength in a transverse direction) of 3.0 or above; and then applying wave-like crepes propagated in the machine direction to the web by creping the web.
摘要:
A method for producing chlorosilanes, which are useful in a wide range of industrial field as an intermediate for organosilicon products such as silicone rubbers, silicone oils, silicone resins, etc. as well as a raw material for the production of organic chemicals such as medicines, agricultural chemicals, dyestuffs, etc., represented by the general formula, ##STR1## wherein R.sub.1 and R.sub.4, which may be the same or different, represent an alkyl group having from 1 to 5 carbon atoms, a chloromethyl group, an ethynyl group or a halogen atom; R.sub.2 and R.sub.3, which may be the same or different, represent an alkyl group having from 1 to 3 carbon atoms; R.sub.5 and R.sub.6, which may be the same or different, represent an alkyl group having from 1 to 2 carbon atoms; and R.sub.7 represents an alkyl group having from 1 to 18 carbon atoms, which comprises reacting a disiloxane represented by the general formula, ##STR2## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are as defined above, or a silanol represented by the general formula, ##STR3## wherein R.sub.2, R.sub.3 and R.sub.7 are as defined above, with phosgene in the presence or absence of a tertiary amide.
摘要:
Ethylcellulose microcapsules, wherein a polymer material which shows at least 1.2 times increase in weight by immersing it in water at 37.degree. C. is incorporated into the ethylcellulose coating walls and/or the core material thereof, are disclosed. Said ethylcellulose microcapsules show rapid release of the core material in digestive organs such as stomach.
摘要:
A grain-oriented silicon steel sheet having excellent magnetic properties can be stably produced by adjusting properly the C content in a silicon steel to be used as a starting material depending upon the Si content in the steel, removing a proper amount of C from the steel during the course after the hot rolling and before the final cold rolling, and further carrying out the final cold rolling at a reduction rate of 40-80%.
摘要:
A seller's workload of managing credit card information can be reduced without changing convenience for an orderer and the seller in a transaction using a credit card. A virtual mall server (3) and a credit card server (5) share conversion information for obtaining, from actual data of the credit card, corresponding dummy data of the credit card. The virtual mall server (3) obtains, based on the conversion information, the corresponding dummy data from the actual data of the credit card to be used for a settlement of the order information, and sends the obtained dummy data to a shop terminal as data of the credit card to be used for the settlement of the order information. Upon receiving, from the shop terminal, a predetermined card processing request based on the dummy data, the credit card server (5) obtains, based on the conversion information, the corresponding actual data from the dummy data of the credit card, and performs the predetermined card processing based on the obtained actual data of the credit card.
摘要:
A sintered ferrite magnet comprising (a) a ferrite phase having a hexagonal M-type magnetoplumbite structure comprising Ca, an element R which is at least one of rare earth elements and indispensably includes La, an element A which is Ba and/or Sr, Fe, and Co as indispensable elements, the composition of metal elements of Ca, R, A, Fe and Co being represented by the general formula of Ca1-x-yRxAyFe2n-zCoz, wherein the atomic ratios (1-x-y), x, y and z of these elements and the molar ratio n meet the relations of 0.3≦(1-x-y) ≦0.65, 0.2≦x≦0.65, 0≦y≦0.2, 0.03≦z≦0.65, and 4≦n≦7, and (b) a grain boundary phase indispensably containing Si, the amount of Si being more than 1% by mass and 1.8% or less by mass (calculated as SiO2) based on the entire sintered ferrite magnet, and its production method.