摘要:
A shirred casing forming a hollow cylinder and displaying an outwardly projecting helical main fold and further displaying in an extended and flattened state, secondary lines lying between the windings of the helical line of the main fold in which the lines of the secondary fold consist of a continuous, uninterrupted, uniform zigzag line which is substantially without further secondary folds, that the peaks of this zigzag line have a substantially constant distance from the helical line of the main fold and that the individual sections of this zigzag line are helical sections which wind in the opposite sense to the helical main fold. A method for shirring sausage casings in which in the method the casing is moved in a direction of its longitudinal axis and while so moving has a force applied to shirr the casing which moves about the longitudinal axis of the casing. An apparatus which includes rollers for forwarding a collapsed casing, an annular element adapted to rotate about the longitudinal axis of the casing to shirr the casing and a backing element adapted to hold the forward end of the casing in a fluidtight manner and having a passage through which an inflating gas may pass to inflate the casing.
摘要:
This invention relates to a process for depositing a copper layer on a surface of a shaped article of a polyimide, which process comprises A. TREATING THE SURFACE WITH A SOLUTION OF A NOBLE METAL SALT AND A HALOGENATED ALKANOIC ACID, AND THEN DRYING THE SURFACE AT AN ELEVATED TEMPERATURE, B. TREATING THE SURFACE WITH A SOLUTION INCLUDING A REDUCING AGENT BUT WHICH DOES NOT INCLUDE A HALOGENATED ALKANOIC ACID, STEPS (A) AND (B) BEING CARRIED OUT IN EITHER ORDER, AND THEN C. TREATING THE SURFACE WITH A SOLUTION CONTAINING A COPPER SALT AND A REDUCING AGENT.
摘要:
This invention relates to a tubular casing of cellulose hydrate having a coating on its inner side composed of a mixture of substances cross-linked by chemical reaction, which mixture is obtained when an aqueous liquid containing A. 1 to 10 per cent by weight, calculated on the total weight of the liquid, of a water-soluble aminoplast precondensate, B. 1 to 4 per cent by weight, calculated on the total weight of the liquid of a fluorine-containing two-component system from Beta 1. POLYMERS OF FLUORINE-CONTAINING ETHYLENE IMINES OF THE GENERAL FORMULA
WHEREIN Rf is a straight or branched, saturated perfluorinated carbon chain with 6 to 10 carbon atoms, and a 1 or 2, or polymers from mixtures of the said ethylene imines, dispersed in Beta 2. FLUORINE-CONTAINING COMPOUNDS OF THE GENERAL FORMULA
WHEREIN R''f is a straight or branched, saturated perfluorinated carbon chain with 5 to 7 carbon atoms, b 1 or 2, and c 18 to 50 (corresponding to polyethylene glycol groups with an average molecular weight of about 800 to 2,000), or in mixtures of the above compounds, provided that, in the component B of the liquid, the ratio Beta 1 to Beta 2 is in the range from 40 : 60 to 60 : 40 per cent by weight, calculated on the total weight of the liquid, and C. a water-soluble cross-linking catalyst, is heated sufficiently to remove the portion of the liquid consisting of water and sufficiently to effect cross-linking, whereby the aminoplast precondensate and/or reaction products of the aminoplast precondensate and the constituents Beta 1 and Beta 2 of the component B are chemically bonded with the OH groups of the cellulose hydrate forming the tubular casing.
摘要:
This invention relates to a process for performing winding operations. In an apparatus for performing the process the winding shafts which are supported at one end only by supports are rotatably and directly driven and are axially displaceable into the winding area of a roll to be wound on which shafts winding cores are mounted before starting the winding operation.
摘要:
1. A LAMINATE INCLUDING A POLYESTER BASE FILM HAVING ON AT LEAST ONE SIDE, A FILM-LIKE COVERING LAYER OF AN AROMATIC POLYAMIDE, POLYAMIDE-IMIDE OR POLYIMIDE AND BETWEEN THE BASE FILM AND THE COVERING LAYER AN INTERMEDIATE LAYER OF THE REACTION PRODUCT OF AT LEAST ONE AROMATIC POLYISOCYANATE WITH AT LEAST ONE EPOXIDE RESIN OF THE GENERAL FORMULA
摘要:
In the transverse stretching of webs of plastic film, in which the edges of the film are continuously held by holding elements while the web is being moved longitudinally, the distribution of flow lines is improved and the differences in thickness within the web are reduced, by asynchronously transversely stretching the web as by causing divergence of first one and then the other edge of the film relative to the direction of longitudinal movement. Preferably the respective divergences are geometrically identical, and/or are periodically displaced in the direction of the longitudinal axis and/or of the transverse axis of the web. The invention may be applied in multi-stage stretching processes and also in simultaneous transverse/longitudinal stretching processes.
摘要:
This invention relates to an apparatus for folding and creasing a sheet of material, comprising rotatable drum means for receiving said sheet on its periphery, A PAIR OF DRIVABLE NIP ROLLERS ON AXES PARALLEL TO THE DRUM AXIS, FOR FEEDING THE SHEET ONTO THE DRUM WHILE THE LATTER IS BEING ROTATED, SAID ROLLERS BEING PIVOTAL PARALLEL TO THEIR AXES TO BRING EACH, ONE AT A TIME, INTO DRIVING CONTACT WITH THE DRUM, A SCANNING ELEMENT FOR THE LEADING EDGE OF THE MATERIAL ON THE DRUM MEANS, AND CONTROL MEANS, ACTUATED BY SAID SCANNING ELEMENT, TO STOP THE DRUM, SO TO PIVOT THE FEED ROLLERS THAT ONE OF THEM WHOSE SURFACE ADJACENT THE DRUM HAS BEEN ROTATING IN THE OPPOSITE DIRECTION TO THE DRUM NOW MAKES DRIVING CONTACT WITH THE DRUM TO DRIVE IT IN THE SAID OPPOSITE DIRECTION, WHEREBY THE MATERIAL IS FOLDED AND PASSES FOR CREASING BETWEEN THE DRIVING FEED ROLLER AND THE DRUM MEANS, AND THEN SO TO PIVOT THE FEED ROLLERS THAT THE OTHER OF THEM DRIVES THE DRUM IN ITS ORIGINAL DIRECTION WHEREBY THE MATERIAL IS AGAIN FOLDED AND PASSES FOR FURTHER CREASING BETWEEN THE NOW DRIVING FEED ROLLER AND THE DRUM.
摘要:
This invention relates to a photopolymerizable copying composition comprising at least one polymerizable compound, at least one photoinitiator and at least one copolymer of methacrylic acid and an alkyl methacrylate having an alkyl group of four to 15 carbon atoms.
摘要:
A stick of artificial sausage casing of regenerated cellulose or thermoplastic material which has bee longitudinally shirred and reinforced by compression is passed through a narrow, round, resiliently expandable passage. The passage is maintained at an elevated temperature and the stick is maintained at a constant length during travel through the passage causing the entire round outer surface of the stick to be smoothed.
摘要:
This invention relates to a process for the manufacture of chemically bonded, textile sheet material based on synthetic fibers, in which a polymer material in the form of a solution or dispersion is incorporated in the flexible textile sheet material and the polymer material is then coagulated, which comprises impregnating the textile sheet material containing synthetic fibers with a liquid binder system containing (a) a liquid aqueous dispersion of an elastomer, (b) a liquid aqueous solution of a hydrophilic polymer, and (c) a liquid aqueous emulsion of a long-chain aliphatic monoisocyanate and/or diisocyanate, or an aqueous dispersion of an ethylene imine reaction product of a monoisocyanate and/or a diisocyanate; heating the textile sheet material to the coagulating temperature of the elastomer; further heating the impregnated textile sheet material to a temperature in excess of 100*C, but below the softening temperature of the fibers contained in the textile sheet material; treating the sheet material with a washing liquid; and drying the sheet material.