摘要:
Les épreuves photographiques sont généralement formées sur un substrat en papier qui confère la rigidité et l'opacité au produit mais peut être affecté négativement par les produits chimiques utilisés pour le développement photographique. La présente invention consiste à déposer une couche photosensible sur une surface (2) d'une feuille polymère (1, 11). Après son exposition, on traite la feuille pour développer l'image (10). Après le traitement, la feuille est collée sur un substrat rigide de support (4, 13) (généralement du papier). La feuille polymère est opaque et est collée (12) sur le substrat sur la surface opposée à la surface sensible. Un matériau indiqué en tant que feuille polymère opaque est le polyester pigmenté blanc MELINEX, produit par ICI. L'opacité du polymère pigmenté juste derrière la couche photographique permet d'obtenir une épreuve d'excellente qualité optique.
摘要:
A wound dressing formed by drying a water-swellable, water-insoluble absorbent composition comprising an alkali soluble polyelectrolyte in solution with a polyhydroxylated material to which is added a metal ion crosslinker is described. Also described is a water swellable, water-insoluble superabsorbent composition and a method of forming superabsorbent compositions.
摘要:
The present invention relates to phenoxy resins suitable for vesicular films and to processes for synthesizing such resins. In a first aspect, the invention relates to a Methyl Cellosolve-free "process branched" vesicular phenoxy resin which is coatable, highly branched, ungelled, non-linear, branched at hydroxy groups derived from a difunctional epoxide, and having a molar ratio of monomeric units derived from a difunctional epoxide: monomeric units derived from a dihydric phenol of greater than or equal to 1. In a second aspect, the invention relates to a Methyl Cellosolve-free hybrid chemically branched process branched vesicular phenoxy resin which is highly coatable, highly branched, ungelled, non-linear and branched at (1) hydroxy groups derived from a difunctional epoxide and (2) epoxide or hydroxy functional groups derived from a branching agent having three or more functional groups.
摘要:
A multistage pump bleaching process comprising at least three bleaching stages including oxygen extraction (20) in an alkaline medium (EO) of a chlorine (C) or chlorine/chlorine-dioxide (CD) bleaching step (5) followed by a hot alkaline hypochlorite treatment (H*/E), (28) or followed by a chlorine dioxide (D) treatment with simultaneous treatment with chlorine dioxide (H*/ED) in the sequence EOH*/ED or EO(H*/ED). The novel bleaching sequences result in significant savings in time and operating costs as compared with conventional bleaching sequences capable of producing products of comparable brightness.
摘要:
A dispenser cabinet for dispensing sheet material from a roll including support members (40, 42) supporting the ends of the roll and including distal end portions (84, 86) engaging the cabinet cover when the cover is closed and cooperable therewith to resist displacement of the support members (40, 42) from the roll ends.
摘要:
A method for forming a non-woven fabric web by wet-laying fibers on paper-making equipment, the web comprising staple length natural or synthetic fibers and wood cellulose paper-making fibers wherein a water furnish of the fibers is made up with a nonionic associative thickener in the absence of a conventional surfactant. A preferred associative thickener for use with hydrophobic fibers is a nonionic urethane block copolymer having a polyethylene glycol backbone, the associative thickener acting as both surfactant and thickener. With predominately cellulosic fibers, i.e. conventional wood cellulose fibers, or a mixture of conventional and contorted wood fibers, and synthetic cellulosic fibers, such as rayon, a nonionic hydroxyethyl cellulose having a long alkyl side chain is preferred. Excellent consistency of the water fiber dispersion is obtained at relatively low viscosity with rapid drainage of water from the wire and uniform formation of the non-woven fabric.
摘要:
The web slitter and groover system for forming first and second spaced circular grooves (16,18) in a roll product (10) includes first and second web cutting assemblies (28,30) alternately and sequentially movable to form web segments of diminished width along spaced portions thereof which, when wound, form the grooves (16,18).
摘要:
A web transfer mechanism in a paper roll towel dispenser of the type having a primary roll (12) and a reserve roll (14) of paper toweling comprises a cradle (16) for supporting the primary roll (12) that is counterbalanced by an element (32) for tucking the leading end of the reserve roll (14) into the nip between feed rollers (24,26). As the primary roll (12) becomes depleted, the counterbalancing force of the roll decreases, causing the tucking element (32) to gradually approach the leading end of the reserve roll (14) until the element (32) finally engages the end and introduces it into the nip. In a preferred embodiment, the device includes a damper mechanism (36,38) to prevent premature introduction of the leading end caused by the tendency of the primary roll (12) to rise above the cradle (16) by a sudden pull on the toweling.
摘要:
A coextruded film having a matte surface layer is prepared by forming the layer from a blend of polyisobutylene and high density polyethylene. The film preferably has a heatseal layer on the other surface. In addition to having low gloss for consumer appeal, the matte surface layer has a medium coefficient of friction for good machinablility and excellent heat resistance to facilitate heatsealing. The film is especially useful as an overwrap for packaging consumer products.