摘要:
Process for the production of an alkylene glycol in which the hydration of an alkylene oxide is carried out in the presence of carbon dioxide using a quaternary phosphonium salt as a catalyst.
摘要:
A method of continuously manufacturing a hermetic plastic zipper wherein the plastic zipper has a readily peelable plastic layer prolonging in a lengthwise direction of the plastic zipper, the readily peelable plastic layer is welded using ultrasonic wave so that the peeling intensity of the welded portion is within a certain range, the method is characterized in that while the engaging portions are brought into a engaged state, the portion of the plastic zipper where the readily peelable plastic layer exists is inserted between an ultrasonic horn and an anvil, and the readily peelable layer is welded by using ultrasonic wave under a condition wherein the distance L between the ultrasonic horn and the anvil is uniformly held at an distance of H≧L≧0.85H wherein H stands for a maximum thickness of the plastic zipper under the engaged state.
摘要:
A multilayered laminate, which comprises a plastic substrate, a thin film of a metal or a metal oxide, formed on a surface of the substrate, and a layer formed on a surface of the thin film, the layer being selected from the group consisting of: (a) a polyvinyl alcohol copolymer emulsion, obtained by aqueous emulsion polymerization of a vinyl acetate monomer, an ethylene monomer and a polyvinyl alcohol; (b) a resin emulsion composition obtained by mixing (i) a polyvinyl alcohol copolymer emulsion, obtained by aqueous emulsion polymerization of a vinyl acetate monomer, an ethylene monomer and a polyvinyl alcohol with (ii) an aqueous solution of polyvinyl alcohol resin; (c) saponified resin of olefin-vinyl acetate copolymer; (d) polyamide resin; and (e) polyvinyl alcohol resin, and a heat-sealable packaging material based on the multilayered laminate.
摘要:
Continuous polymerization method using a tubular continuous polymerization apparatus, wherein a peg 1 for tube cleaning is passed through a polymerization solution in polymerization tube 6 while contacting with the inner wall of the tube during the polymerization. The apparatus used in the method is equipped with polymerization tube 6; a first raw material inlet tube 8 connected with polymerization tube 6; a peg inlet tube 4 connected with polymerization tube 6; a second raw material inlet tube 10 connecting tube 8 with tube 4; valve 5 for opening and shutting between polymerization tube 6 and tube 8; valve 3 for opening and shutting between tube 10 and tube 4; and valve 7 for opening and shutting a connection between the tube 8 and tube 10. The invention can (1) eliminate the washing and cleaning of the polymerization tube at the exchange of species; (2) reduce loss in raw material and time which goes on until the inside of the tube reaches a steady state and (3) prevent scale production on the inner wall of the polymerization tube.
摘要:
A bioabsorbable suture according to the present invention is characterized in that the suture is manufactured from monofilaments or multifilaments spun from a spinning raw solution containing one or two or more component(s) selected from the group consisting of chitin, chitosan, and derivatives thereof and a degrading enzyme for the component(s), and the degrading enzyme exists on a surface of the suture and in the suture.
摘要:
A plastic package with a fastener composed of a plastic package body and a sealing sheet disposed in an internal portion of the package, wherein a first side of the package body and the sealing sheet are capable of being opened and closed by the fastener at an inlet portion of the package body, and a second side of the package body and the sealing sheet are sealed and the first side of the package body and the sealing sheet are bonded by peelable bonding portion(s) at a more internal side and/or external side of the package than the fastener. The package of the present invention has excellent filling, opening and resealing abilities even if the contents are liquid, as well as excellent pressure resistance.
摘要:
A plastic zipper has a pair of female (11, 13) and male (21, 23) hooks formed on the surface of plastic films, 10, 20 and an inside of the male hooks are engaged with a pressing rib 31 to form a sealing section independent of a locking section constituted by the pair of female and male hooks. The zipper permits good hermetic sealing performance, easy opening, and easy reseating.
摘要:
A contact-dehydrating sheet suitable for use in the production of dried protein-containing food such as fish and meat and a method for drying the protein-containing food are presented. The contact-dehydrating sheet comprises:(a) a water permeable film,(b) a dehydrating layer consisting essentially of a water absorbing polymer substance dispersed in a hydrophilic adhesive substance, said layer being placed on the surface, opposite to the surface where the protein-containing food to be dried is contacted, of the water-permeable film, and(c) a protective film covering over the dehydrating layer.
摘要:
A plastic zipper includes a pair of male hooks and female hooks for a slider guide operable parallel to the hooks for sealing on the opening side of the zipper wherein, at the same time, an inside guide of the slider is positioned between the hooks for sealing and hooks for slider guide in the case of a plastic zipper equipped with a slider.
摘要:
There is disclosed a slider for a plastic zipper, including an inside guide which is inserted between a pair of male hook and female hook of a plastic zipper, functions so as to disengage the male hook and female hook from each other by the sliding movement of the slider, is installed on the slider main body rotatably about an axis perpendicular to the plastic zipper, and is capable by the rotation, of being located at a prescribed position where it functions as such or being dislocated from the above prescribed position.The above slider is easily attachable to a plastic zipper at a rate higher than a bag manufacturing rate, and is prevented from falling-off even if a small plastic zipper is formed of a thin film with low strength.