Abstract: A method and apparatus for coating a moving web of paper of paper-board. In the method, the web to be coated is passed to a coater station, wherein a coat layer is applied to at least one surface of the web, and the web is dried at least to some degree and passed to the next treatment step. The coat is applied by spraying the coating mix on the web surface by a high-pressure spraying nozzles, the pattern width covered by a single nozzle is essentially narrower than the cross-machine width of the web being coated.

Abstract: A printing paper is provided having the appearance of uncoated paper and improved printability properties approaching those of coated papers. Also provided are a surface treatment formulation having a variable viscosity and a method for producing a printing paper having the appearance of uncoated paper and improved printability properties approaching those of coated papers.

Abstract: A printing paper is provided having the appearance of uncoated paper and improved printability properties approaching those of coated papers. Also provided are a surface treatment formulation having a variable viscosity and a method for producing a printing paper having the appearance of uncoated paper and improved printability properties approaching those of coated papers.

Abstract: A surface coating applied on a substrate as well as a method of preparing a surface coated substrate are provided. A mixture comprising about 40% polyvinyl acetate and about 60% polyvinyl alcohol is applied to a porous substrate. Then, the mixture is heated. The polyvinyl alcohol cures by evaporation, and the mixture separates into a hydrophilic layer of polyvinyl alcohol and a hydrophobic layer of polyvinyl acetate, and the hydrophilic layer is between the hydrophobic layer and the substrate. A water-soluble ink is then deposited into the surface coating, and the ink is generally repelled by the hydrophobic layer, and is generally absorbed by the hydrophilic layer. Additionally, the hydrophobic layer protects from fading the ink which is absorbed into the hydrophilic layer, causes the ink to spread less in the hydrophilic layer, allows a charge to be applied to the same side of the substrate on which the ink is deposited, and allows an enhanced surface charge to be applied.

Abstract: A method of preparing a fast-setting coating material on a substrate which comprises contacting a stable aqueous dispersion of a polymer that contains strong cationic groups and weak acid groups onto a substrate that is basic or treated to be basic.

Abstract: A coated abrasive sheet material comprising (a) a backing substrate having at least one major surface, (b) a plurality of abrasive grains, (c) a binder bonding said plurality of abrasive grains to said at least one major surface of the backing substrate, wherein the backing substrate comprises paper having a basis weight of less than about 200 g/m.sup.2 which is essentially free of latex saturants and has on said at least one major surface with the plurality of abrasive grains, one or more extruded layers of a thermoplastic polymer, and a method of making the coated abrasive sheet material.

Abstract: Sheets to be coated with water-based coating material, for example a primer and a low adhesion backsize, are supplied from a feeder (1), in end-to-end overlapping relationship, to a dual coater (3) in which the sheets are coated individually on both sides. A sheet inserter (2) is provided, upstream of the dual coater, to insert sheets from a second supply into the sheets from the feeder (1). The dual coated sheets are dried as individual sheets or as a pseudo-web of overlapped sheets. The sheets are then overlapped, unless previously overlapped, and the direction of overlap changed, if necessary, to provide the trailing edge of each sheet on top of the leading edge of each succeeding sheet. The overlapped sheets are conveyed through an adhesive transfer station (7) where stripes (236) of at least partially dried adhesive are coated onto the dual coated sheets from a transfer belt (71).

Abstract: A printing paper is provided having the appearance of uncoated paper and improved printability properties approaching those of coated papers. Also provided are a surface treatment formulation having a variable viscosity and a method for producing a printing paper having the appearance of uncoated paper and improved printability properties approaching those of coated papers.

Abstract: A method of producing a multiple coated cellulosic sheet product having a surface which is smooth, bright and capable of being printed upon, includes the steps of coating a substrate comprising a cellulosic sheet with a first layer of an inorganic pigment-containing aqueous coating composition, and coating the first layer with a second layer of an inorganic pigment-containing aqueous coating composition to form a product in which the first layer is bonded to the cellulosic sheet and the second layer is bonded to and inseparable from the first layer, wherein there is incorporated into the first layer a sizing agent in an amount of up to 0.6% by weight based on the dry weight of the pigment present in the first layer. The sizing agent is selected from alkene ketene dimers, alkenyl succinic anhydrides, and anionic polyurethane sizes.

Abstract: The present invention is directed to a method of preparing a carbonless paper by ink jet application of molten particles before or after application of capsules.

Abstract: A process for manufacturing a material from a greaseproof paper used as support. At least one face of the support is coated with water or at least one aqueous solution. The support thus becomes a pliable support, The surface of the pliable support is treated by depositing one or more pigmented layers on the surface. This treatment improves the qualities of metallization or of printing or of both of the paper, relative to uncoated greaseproof paper. The pliable support thus becomes a pliable coated support. The pliable coated support is then calendared.

Abstract: A process of making a coated paper comprises the following steps: 1) providing a paper layer composed of a blend of pulp fibers and particulate material containing polyvalent metal cations, 2) applying a acidified alginate solution of a material selected from salts and derivatives of alginic acid to cover at least a portion of the paper, 3) reacting the salts and/or derivatives of alginic acid with polyvalent metal cations in the paper to form a polymer coating, and 4) drying the paper and polymer coating. The permeability of the coated paper is generally at least about 75 percent less than the permeability of an identical uncoated portion of the paper. The solution of alginate material may be partially cross-linked. The alginate solution may be deposited utilizing gravure printing techniques. Also disclosed is a coated paper and a wrapper for a smoking article.

Abstract: An improved coated paperboard or plate stock useful for forming substantially rigid food containers such as plates, bowls, trays and the like and a process from producing the improved coated paperboard are provided. A base coat comprising a styrene acrylic latex and a pigment is applied directly to the paperboard, and a top coat comprising a styrene acrylic polymer latex and a pigment is applied directly to the base coat to form the coated plate stock. The improved coated plate stock is characterized by improved grease, oil and cut resistance, improved varnish gloss, enhanced smoothness, and improved printing quality.

Abstract: Improved process for producing a support for recording material comprising the steps of calendering a base paper including 1.8%-10.0% water content under nip pressure from 400 kg/cm to 3000 kg/cm at the roller temperature from 10.degree. C. to 140.degree. C., and extusion coating the base paper with melted thermoplastic resin is proposed. The support produced by the process is superior in surface smoothness and glossiness. Upon using it for a recording material, excellent image with less unevenness can be obtained without using heat calendering at excessively high temperature after the coating.

Abstract: The invention relates to the use of coating compositions to prepare coatings having water vapor permeabilities of at least 2500 g/m.sup.2 per day (DS 2109 TM1 method) containing(A) a polyurethane containing (1) 0.1 to 75 meq/100 g of ionic groups and (2) 11 to 50% by weight of --(CH.sub.2 CH.sub.2 O).sub.

Abstract: A multi-ply structure which includes a release coating sandwiched between two plies of the structure and present in an amount of about 5 to about 25 g/sq yd., one of the plies of the structure being flexible and in contact with the release coating and removable therefrom by the application of a force of between about 90 to about 600 g/in., as determined by the Keil test procedure, including a composition for forming the release coating and comprising an aqueous coating composition which includes a solids portion and which is effective in forming a coating having release properties, the solids portion of the composition comprising a major amount of resin binder and a minor amount of filler, the filler comprising a major amount of clay and a minor amount of magnesium or calcium hydroxide, and including also a continuous process for forming such multi-ply structure, including particularly a structure comprising a poly(vinyl chloride) ply strippable from a support ply.

Abstract: A method of making and using a compostable paperboard container and package for liquids which is coated with a polymeric material capable of degrading under composting conditions and subsequently in the presence of light to form carbon dioxide, water, and biomass.

Abstract: A method of making resin coated photographic paper which comprises providing a paper base, subjecting the paper base to a flame treatment and a corona discharge treatment, providing a polyolefin melt curtain, treating the polyolefin resin melt curtain with a mixture of ozone and air and bringing the paper base in contact with the polyolefin melt curtain to provide a uniform layer of polyolefin resin on the paper base.

Abstract: A coating method characterized in that a coating liquid including a pigment and a binder, and having a concentration of between 50 and 70% by weight and a viscosity of between 700 and 4000 cps, is deaerated in an environment having a degree of vacuum of a saturated vapor pressure or less and under a condition of applying shear to the coating liquid, and a printing base paper is coated with the deaerated coating liquid having the curtain-like shape to produce a coated paper for printing and having a superior white paper brightness, smoothness, uniform coating quantity, and printing suitability.

Abstract: A decorative painting is made by wetting a paper substrate, stretching the paper onto a rigid flat board, drying the paper, defining outlines of figures on the paper, masking the outlines, applying watercolor to the paper, applying crystals of rock salt on the watercolor by a method such as dropping, throwing, or scattering while the watercolor is wet, drying the watercolor, removing the rock salt, paining the figures, removing the masking, and painting the outlines. The rock salt reacts with the wet watercolor to create decorative gradiations in pigmentation.

Abstract: A non-foil paperboard laminate having improved resistance to the migration of essential oils, flavors and vitamins in liquid packaging and improved oxygen barrier characteristics for both liquid and dry packaging has a paperboard sandwiched between two layers of a heat-sealable, low density polyethylene polymer and including a symmetrical five component barrier layer coextruded onto the surface of one of the low density polyethylene layers. The barrier layer includes low density polyethylene/adhesive tie layer/Ethylene vinyl alcohol copolymer/adhesive tie layer/low density polyethylene.

Abstract: A method is described for continuously producing a smooth, high gloss coating on a paper container comprising the steps of applying a substantially uniform coating of melted wax material to the outside surface of the container or sheet stock, maintaining the temperature of the wax coating above its melting point and above its congealing temperature, imparting a constant surface velocity to the outside surface of the container or sheet stock and applying a substantially uniform film of liquid coolant, particularly water, to the outside surface of the container or sheet stock whereby the surface velocity of the coolant is substantially equal to the surface velocity of the container or sheet stock.

Abstract: When a paper web is coated on paper machine the surface temperature is controlled at or below a temperature determined by an equation (1) given below, in order to obtain a coated paper having an evenly coated layer. ##EQU1## where T: surface temperature of the paper web (.degree.C.)m: wet value of the paper web (g by weight)v: viscosity of the coating composition (cps)x: x=40 or 35 with 35 being the preferred form of the equation.

Abstract: A method of making a photographic paper support having improved raw stock keeping characteristics by an internal acid sizing step and an external alkaline sizing step to achieve a water extractable pH of from 6 to 9.5.

Abstract: A paper having an absolute dry moisture content (moisture content in absolute dry condition) of 1.8-7% is subjected to a heat calendering treatment at a temperature of 150.degree.-300.degree. C. under a linear pressure of 40 kg/cm or above to provide a paper which has both satisfactory surface smoothness and rigidity (stiffness) and is suited for use as a photographic support.

Abstract: A process of producing high quality extrusion coated paper for high quality printing by extruding polyethylene on a highly smoothed base sheet of paper and passing the coated base sheet through the nip of two cooperating rollers, at least one of which rollers is a low-friction gloss chill roller having a surface finish with a degree of roughness between that of a high gloss roller and a matte finished roller.

Abstract: A support for photographic printing paper containing a base paper having polyolefin coated on both surfaces thereof, wherein as the base paper is used a one side-machine glazed paper having a glossy surface which is obtained by bringing one surface of a wet paper into intimate contact with the mirror surface of a heated mirror surface type drier and drying.

Abstract: A thermosetting resin decorative laminated sheet faced with a resin-impregnated sheet layer obtained by impregnating a sheetlike material with a resin composition containing an amino resin (I) produced by the reaction of formaldehyde with an amino compound (A) having as an essential component thereof at least one carboguanamine (a) selected from the group consisting of cyclohexanecarboguanamine and norbornanecarboguanamine and curing the resultant impregnated sheetlike material excels in flexibility, crack resistance, light resistance, and chemical resistance. A decorative overlaid plywood enjoying similarly desirable properties is obtained by integrating the aforementioned sheet layer with a substrate.

Abstract: A transfer recording medium comprising a substrate and a plurality of image forming elements bonded thereto by a binder is provided. The surface of each image forming element at least partially protrudes out of the binder. Such transfer recording medium may be prepared by applying the binder onto the substrate in a prescribed thickness, disposing the image forming elements in excess on the binder, and then removing the excess of the image forming elements. The thus prepared transfer recording medium provides an image having a high density and a faithfully reproducible color.

Abstract: Disclosed are modified spray guns, particularly electrostatic spray guns, for implementation of the vaporous amine catalyst spray method disclosed in U.S. Pat. No. 4,517,222. In particular, the present invention broadly is directed to a spray gun for spraying atomized liquid, e.g. vapor permeation curable paint, with the assistance of a vaporous amine flow via an amine flow path established in the spray gun wherein the improvement comprises a control apparatus actuable in the absence of the vaporous amine flow to cause a heated non-amine gas, preferably heated air, to flow through and purge the amine flow path within the gun for maintaining a desired flow path temperature adequate for suppressing amine condensation in the flow path. The spray gun can be a hand spray gun or an automated spray gun utilizing air atomization or mechanical atomization, operating under electrostatic spray conditions if desired.

Abstract: Disclosed are modified spray guns, particularly electrostatic spray guns, for implementation of the vaporous amine catalyst spray method disclosed in U.S. Pat. No. 4,517,222. In particular, the present invention broadly is directed to a spray gun for spraying atomized liquid, e.g. vapor permeation curable paint, with the assistance of a vaporous amine flow via an amine flow path established in the spray gun wherein the improvement comprises a control apparatus actuable in the absence of the vaporous amine flow to cause a heated non-amine gas, preferably heated air, to flow through and purge the amine flow path within the gun for maintaining a desired flow path temperature adequate for suppressing amine condensation in the flow path. The spray gun can be a hand spray gun or an automated spray gun utilizing air atomization or mechanical atomization, operating under electrostatic spray conditions if desired.

Abstract: Extrusion coating with high line speeds of up to 600 mpm may be achieved without sacrificing the adhesion of the coating to the substrate by using an ethylene copolymer with up to 3% by weight copolymer, preferably 0.5 to 2.5% by weight VA, as the coating polymer. The extrusion temperature is in the region of incipient degradation, but maintained below the level which gives undesired degradation leading to odor or discoloration.

Abstract: Phospholipids such as lecithins provide improved rheological properties for coating a rapidly moving web, such as a paper web. The phospholipids are preferably applied to the paper web as part of a coating mixture, and they can be included in the coating mixture by first including the phospholipid in a lubricant additive mixture that includes an emulsifier, a fatty acid vehicle, and plasticizer. The lubricant is well-suited for short-dwell coating methods.

Abstract: In the process according to our invention authenticating (code) marks are provided on paper, particularly a security or other financial instrument, by contacting laser radiation from a laser light source on the paper to form the authenticating marks. The objects of our invention are attained with an apparatus equipped with a pivotable mirror device which allows the laser radiation to be directed on sheets of paper arranged transverse to the transport direction on a paper sheet. A preservative medium can be used to coat and protect the marks particularly from mechanical abrasion.

Abstract: An improved makeready packing for preventing corrosion of cylinders of offset or lithographic printing presses which comprises providing a cylinder surface contacting packing element having a corrosion inhibitor applied thereto in such a manner that the inhibitor will effectively protect the entire surface of the cylinder.

Abstract: The disclosure is of the use of a primer formulation comprising styrene/butadiene rubber, water and alcohol that is employed to promote hot melt adhesion of fluorocarbon treated grease resistant papers, which are used in storage bags and containers for such products as pet foods, for example.

Abstract: An apparatus and method to saturate a fibrous web. The apparatus comprises a sealed chamber divided to form a low pressure preparation zone and a high pressure treatment zone. Air is evacuated from the open area between the fibers in the web in the vacuum zone and liquid in the treatment zone is forced into the evacuated open area between the fibers in the web. A pair of nip rollers are submerged in liquid in the treatment zone for squeezing residual air and liquid from the open area between the fibers in the web to cause liquid to be drawn into the open area between the fibers in the web upon exiting the nip between the rollers.

Abstract: A backing sheet for the weathering-resistant coating of thin, plane backings in continuous presses without recooling comprising(A) a paper impregnated with curable melamine resin in an amount of 40 to 60 weight percent of aminoplast resin, based on the weight of the paper, in the dried state, and(B) a coating of curable acrylic resin on the impregnated paper in an amount of 60 to 150 g/m.sup.

Abstract: This invention relates to a method of pretreating cellulosic webs with dry vapors of a lower alkylhalogeno silane, which react with hydroxyl groups in said cellulosic web, and subsequently coating said web. Said invention also relates to the article of manufacture prepared by said method.

Abstract: Membranes based on silicic acid heteropolycondensates are produced by hydrolytic polycondensation of at least one silicic acid derivative in the presence of water and, if appropriate, a condensation catalyst, the polycondensation being carried out at the surface of a support, which supports the resulting membrane. The reactants can be fed to the surface of the support via the gas phase or via one or more liquid phases.

Abstract: A method for the coating of a raw paper or cardboard substrate wherein the substrate is prepared having a pH of less than about 6.5, and a coating is applied thereto composed of an aqueous dispersion of a plastic and an inorganic pigment, the coating having a pH of more than about 6.5 wherein the particles of the plastic in the dispersion have a non-cation-active charge and wherein the coating also contains a material which does not affect the preparation or storage stability of the coating, but which in the pH range below about 6.5 becomes highly cation-active, and then drying the thus applied coating. Using this method, the coating solidifies at the time of contact of the coating and the paper surface thereby minimizing penetration of the coating into the paper. As a result, improved coated papers are obtained.

Abstract: A method for treating starch with organosiloxane polymers is described in which the organosiloxane polymer is contacted with starch in an aqueous dispersion at a temperature of from 60.degree. C. to 98.degree. C. for a period of at least 60 seconds. Starch treated by this method can be useful as glue, a binder, a filler, or a coating. Starch treated with aminoalkyl- or epoxyalkyl- substituted polydimethylsiloxane is especially useful as a water repellent sizing for substrates such as paper and textiles.

Abstract: In manufacturing a photographic support by coating a travelling paper substrate with a polyolefin resin, the adhesion of the resin to the substrate can be markedly improved by subjecting the uncoated paper substrate to an activation treatment on the side to be subsequently coated with the polyolefin resin and exposing the side of the molten polyolefin resin to be brought into contact with said paper substrate to an ozone-containing gas blown against said molten resin. This method leaves behind no adverse effect on the photographic emulsion which is subsequently applied and permits of marked improvement of the productivity at a low cost.

Abstract: A process for the preparation of a photographic resin-coated paper which comprises subjecting a paper sheet to corona discharge treatment or flame treatment, and then coating the so treated paper sheet with polyolefin resin containing titanium dioxide powder coated with an alcohol having 2-18 carbon atoms and 2-4 hydroxyl groups.

Abstract: A process for producing photographic paper comprising bleaching a paper web containing from 0 to 65% by weight water is disclosed.

Abstract: Improved base coatings for use on paper substrates to be vacuum metallized consist essentially of an organic solvent solution (e.g. ethyl acetate or ethyl acetate/toluene) containing about 10-30 wt. % of a film-forming coating mixture of (a) about 90-98 wt. % of a vinyl acetate/acrylic acid copolymer (97.5-99/1-2.5%) or a vinyl acetate/monoethyl maleate copolymer (94-97/3-6%) and (b) about 2-10 wt. % of a soluble nitrocellulose resin solids, the resin being soluble in the solvent and having a nitrogen content of about 12 wt. % and a viscosity of from about 4-5 sec. in a 25% solution to about 3-4 sec. in a 20% solution of ethyl alcohol/toluene/ethyl acetate (25/55/20), when measured using the Falling Ball method.Paper products coated with the base coating (about 2-6 lbs./3000 ft..sup.2) are characterized by a balanced combination of alkali removability, water-resistance, and block-resistance. The metallized products are smooth and glossy, and the aluminized product is especially useful for bottle labels.

Abstract: Potassium hydroxide or another alkaline potassium compound is used to adjust the pH of an aqueous color developing clay coating composition in the manufacture of color developing material for use in pressure-sensitive or similar copying systems. This reduces the decline in reactivity with time of such material and increases initial print intensity compared with conventional material in which the corresponding sodium compound is used for pH adjustment. Especially good results are obtained where the material being coated is a paper of high acidity such as results from rosin/alum sizing.

Abstract: A method for coating a web with a coating liquid wherein heavy coating of the web at the coating start position with the coating liquid is prevented. While a thin layer of pretreatment liquid having a low viscosity and consisting of water and/or organic solvent is applied at the coating start position and the region around the coating start position on the web, the web is fed into a coating section where the web is coated with the coating liquid with the coating liquid applied over the thin layer of pretreatment liquid on the web. With the coating operation carried out with a hopper-type coating device, a method is preferably employed in which the amount of pressure reduction of a bead stabilizing suction chamber is set at value higher than that used for steady-state operation.

Abstract: A process for rendering cellulosic material water repellent that requires no subsequent neutralization step while retaining the desired water repellent and strength characteristics thus provided by selecting a cellulosic material having a water content of up to about 10%, preferably below about 2% and contacting the material with vapors of a lower alkyl silicon halide during which contacting the concentration and temperature of the halide vapor, the pressure within the treating chamber and the contact time are all maintained so as to provide a water repellent cellulosic material having a pH greater than 2.5. In one aspect of the invention, the cellulosic material subjecting to contacting is substantially frozen and in another aspect contacting is conducted under vacuum.

Abstract: This invention provides composite material compositions comprising wastepaper, a thermoplastic resin and/or other additive(s), said compositions having higher heat resistance, flame retardancy and mechanical strength and smaller linear shrinkage in molding than the conventional compositions of synthetic resins alone or blended with woodmeal or an inorganic filler. There is also provided a method of producing said compositions comprising a wastepaper crushing step, a step of mixing crushed wastepaper with a thermoplastic resin and/or other additive(s) while drying said wastepaper, a blend melting step, a blend kneading step and a blend granulating step. In an embodiment of this invention, scraps of moldings from the composite material compositions using wastepaper may be mixed with wastepaper, a thermoplastic resin and/or other additive(s) and similarly treated and molded into a new composition.