摘要:
Packaging paper consisting of an unbleached kraft paper with a kappa value according to ISO 302:2015 between 38 and 60, preferably between 40 and 58 as base paper, which is optionally coated on at least one side, wherein the kraft paper is made of at least 90% primary pulp, has a basis weight according to ISO 536:2019 between 60 g/m2 and 150 g/m2 and an air resistance according to ISO 5636-5:2013 (Gurley) between 5 and 30 seconds, wherein the base paper has an elongation at break in the machine direction according to ISO 1924-3:2005 between 2.5% and 8.5% and has a Bendtsen roughness according to ISO 8791-2:2013 between 70 ml/min and 600 ml/min, preferably between 150 ml/min to 550 ml/min, more preferably 200 ml/min to 500 ml/min, and process for its production.
摘要:
A paper-polymer product as a fibrous, open web structure with polymer within the fiber structure of the cellulose fibers. The polymer is formed in-situ from a liquid, non-polar vinyl monomer such as p-chlorostyrene or p-methylstyrene. The open spaces of the fibrous web structure are substantially free from polymer.
摘要:
A composition is provided for addition to cellulosic fibers prior to felting them into a sheet comprising as component (a) a monomeric water soluble diallyl dimethyl ammonium halide or homopolymer thereof or mixtures thereof and as component (b) a water dispersible complex fatty amido compound, the proportion of (a) and (b) being sufficient to enhance softness of the dried sheet while increasing or not substantially reducing absorbency of water and tensile strength.
摘要:
The properties of a fibrous substrate are improved by application of a composition comprising a hydrophilic air-curing polymer and a compound comprising at least two free radical polymerizable unsaturated groups. The composition can optionally contain in addition a latex of a thermoplastic polymer.
摘要:
A method of increasing polymerization reaction rates during the production of a fiber-thermoplastic matrix by in situ bulk polymerization is described, allowing polymerization to at least 25% polymer content by weight of the matrix in less than 8 minutes. In a fibrous web of less than 0.25-inch thickness, saturated with a liquid phase polymerizable composition containing a vinyl monomer and a thermally activated free radical initiator at 1/2-10% by weight of the composition, polymerized by the application of controlled temperature and pressure conditions, reaction rates of less than 8 minutes are attained by: (a) initiating polymerization with the matrix containing a monomer concentration in excess of that which if completely polymerized is desired in the final product matrix; and (b) polymerizing the monomer contained in the matrix until the desired level of polymer is attained while, simultaneously with the polymerizing step, removing excess monomer at a controlled rate such that the reaction is sustained until the desired level of polymer in the finished matrix is attained. The resulting matrix is then treated further to remove any excess monomer and is suitable for molding by the application of pressure and heat into useful products.
摘要:
Process for the addition of hexafluoropropene in the presence of ultra violet light to a hydrocarbon or substituted hydrocarbon compound containing at least one aliphatic carbon-hydrogen bond and which is free of acetylenic and terminal ethylenic unsaturation.
摘要:
THIS INVENTION RELATES TO IMPROVED LAMINATING MATERIALS, ESPECIALLY SATURATING PAPER, CONTAINING DIACETONE ACRYLAMIDE, OR AN ANALOGUE OR METHYLOLATED DERIVATIVE THEREOF (DAA), WHICH ARE ESPECIALLY USEFUL IN THE PRODUCTION OF LOW-PRESSURE LAMINATED STRUCTURES AS EXEMPLIFIED BY LOWPRESSURE POLYESTER LAMINATES. THE IMPROVED LAMINATING MATERIALS, E.G., SATURATING PAPER, ARE CHARACTERIZED BY A HIGH DEGREE OF WATER-RESISTANCE IMPARTED TO LOW-PRESSURE LAMINATES EMBODYING THE SAME, AS WELL AS BY EASE AND UNIFORMITY OF SATURATION WITH THE LAMINATING RESIN AND BY UNIFORMITY OF COLOR OF THE ULTIMATE LAMINATE AS WELL AS THE LAMINATING MATERIAL, E.G., THE SATURATING PAPER ITSELF. THE DISCLOSURE ALSO RELATES TO CORRESPONDING RESIN-SATURATED LAMINATING MATERIALS ("PREPREGS"), A METHOD OF MAKING SUCH IMPROVED LAMINATING MATERIALS, AND LAMINATES THEREOF HAVING SUCH SUPERIOR WATER-RESISTANCE.