Abstract: The disclosure concerns a technique for forming screen packs which may be used in filtering foreign matter from an extruded plastic material. Such technique involves initially forming a sandwich array which includes a number of sheets of screening, each sheet of screening having a desired orientation with respect to each other sheet of screening. The sandwich array also includes at least one sheet of thermoplastic material. The sandwich array is heated, in order to cause the thermoplastic material to flow into the openings in the sheets of screening, such that the sandwich array will constitute a unitary structure upon the cooling of the thermoplastic material. Thereafter, at least one screen pack, and preferably several screen packs are formed from such unitary structure, e.g., through the performance of a suitable punching operation on the unitary structure.

Abstract: Self-adhesive webs or sheets are disclosed which are easily marked by ordinary printing means. They are prepared by coating a flexible substrate with a reactive mixture of a polyurethane, an aliphatic trifunctional isocyanate having terminal isocyanate groups, glycerin, microfine siliceous matting agents, and an organic tin ester catalyst. A process for their manufacture is also disclosed.

Abstract: A central band of cold glue is applied over most of the length of a label. Each label is then engaged by one of several circumferentially spaced gripper fingers on a rotating head which causes the labels to pass a hot glue applicator which applies bands lengthwise of the label on each side of the central cold glue band. Each label is finally rotated to a properly positioned container where a reciprocable squeezer presses the label onto the container.

Abstract: Compositions that may be used as primers for bonding silicone elastomers to porous substrates which are obtained from the reaction of an acrylate and an acryloxyalkylakoxysilane in the presence of a free radical initiator and an organic solvent.

Abstract: A laminated article in which a composition containing interpolymerized vinyl chloride, vinyl acetate and vinyl alcohol; a copolymer of ethylene and vinyl acetate and a castor oil-modified sebacic alkyd is interposed between a vinyl skin and the printing on the surface of a vinyl core.An adhesive composition is also claimed.

Abstract: Method and machine for fabricating plasticboard wherein areas of bonding are created with localized heating and pressure.

Abstract: A method and apparatus for welding PVC pipe which includes a means to clamp and apply welding heat so that plastic pipes may be welded while under external pressure adapted to offset internal pressures. The method includes the steps of placing a clamp about a splice to be welded, tightening the clamp and applying heat through the clamp to the plastic in sufficient quantities to cause the plastic to fuse. The steps are carried out by utilizing an apparatus comprised of a clamp which is adapted to encompass the area to be welded and apply a constricting force to that area while heat is transferred through the clamping means to the plastic.

Abstract: The process herein is used for achieving multilevel mechanical embossing of a sheet material having a fused or cured wear layer. An embossed pattern is provided in register with a printed design under the wear layer. A two stage embossing is carried out. In the first stage embossing, a texturing is placed on the raised areas of the finished product. The second stage embossing provides deep embossing, which would be in register with the printed design under the wear layer.

Abstract: A fusion adhesive comprising an olefin copolymer comprising 70 to 95 percent by weight ethylene, 0.5 to 10 percent by weight of an amide of an unsaturated carboxylic acid and 0.5 to 15 percent by weight of an unsaturated carboxylic acid, the use of such fusion adhesive to secure two objects together, especially a polymeric plastic composition to a metal composition.

Abstract: A soft, non-woven fabric containing no binding agents and composed, at least in part, of thermoplastic fibers bonded to other fibers at their crossing points, which non-woven fabric is produced by a process which comprises passing a mat composed of said thermoplastic fibers over a surface and to said mat applying an uneven heated surface, said heated surface being sufficient to fuse, at least in part, a portion of said thermoplastic fibers to other fibers at some but not all of their crossing points, while at the same time the fusing is effected without any substantial compression of the fabric.

Abstract: Improved, fast curing adhesives, with and without fillers, and articles bonded therewith are provided. The adhesive comprises a first part made up of a thermoplastic, non-reactive elastomeric polymer dissolved in an addition polymerizable combination of an acrylic or methacrylic monomer, a copolymerizable monomer containing at least one free carboxylic acid group, and a non-activated free radical addition polymerization catalyst system, and a second part comprising an activator for the free radical catalyst system. Exemplary of such a formulation is a first part made up of a elastomer, e.g. an acrylonitrile/butadiene rubber dissolved in a mixture of acrylic acid and methyl methacrylate, each of the three components being present in equal amounts. About 5 weight percent benzoyl peroxide and about 0.1 weight percent hydroquinone are dissolved in the mix. The resulting formulation has a high degree of relative stability in the absence of an activator for the benzoyl peroxide. An appropriate second part, i.e.

Abstract: A process of modifying the levelling characteristics of a film of a polar liquid coating composition by incorporating therein 0.5-60% by weight of an amphipathic random copolymer which comprises 5-50% of a monomer which has a chain-like structure at least 80 covalent bonds long and which is soluble in poly(ethylene oxide) of molecular weight 400, and 25-95% of a (meth)acrylate monomer which comprises a chain-like moiety of at least 10 covalent atoms long and which is not soluble in poly(ethylene oxide) of molecular weight 400. The resulting copolymer may be added to polar liquid coating compositions to give useful improvements in flow and levelling characteristics.

Abstract: Acrylated dithiocarbamyl esters of Formula I ##STR1## wherein R is hydrogen, or alkyl of 1 to about 10 carbon atoms; R' is hydrogen, or methyl; x is an integer of from 2 to about 10; y is 0 or an integer of from 1 to 3; z is 1 or 2; and n is an integer of from 1 to about 10 are disclosed. The compounds are useful as reactive diluents or photocurable prepolymers.

Abstract: A sensitized record sheet material is disclosed, suitable for developing color in oily, colorless, chromogenic dye-precursor inks applied thereto. Said record sheet material has a light, reactive, coating which comprises a zinc compound and a salicylic acid derivative combinded in, and applied from, an aqueous system of basic pH. The coating composition is also disclosed, as is the process for making it.

Abstract: A method is disclosed for adhesively securing an open mesh, woven nylon or polyester scrim fabric to avoid distortion or movement of the individual yarns or thread members of said fabric said method comprising applying to said fabric a coating of a dispersion of a carboxylated copolymer of chloroprene and methacrylic acid and drying said coating thereby bonding the warp and fill yarns of said fabric together at their cross over points.

Abstract: A method of applying miniaturized high-temperature free-grid strain gauges to a test location by welding an auxiliary temporary backing to a strain gauge equipped with supporting or backing foil and connecting excess-length connecting webs thereto for manipulation of the gauge. Thereafter, the strain gauge is adhered, grid side facing downwardly, to a porous backing by means of an adhesive, the backing foil is then stripped off and the adhesive dissolved by a chemical solvent. The strain gauge is then applied to the test location and affixed thereto.

Abstract: Bis-ketimine esters of the general formula ##STR1## wherein, for example, R and R.sup.1 are alkyl groups,X is alkylene, andY is the non-carboxyl moiety of a dicarboxylic acid, are disclosed. Said compound is mixed with an acid polymeric anhydride to form an ambient moisture-curable adhesive composition.

Abstract: The invention relates to improvements in the method of and means for automatic attachment of labels or transparent envelopes having a pressure sensitive adhesive backing, on a sheet of material such as a file folder or the like.

Abstract: Solutions of chlorosulfonated polyethylene or mixtures of sulfonyl chlorides and chlorinated polymers in polymerizable vinyl monomers having a Brookfield viscosity of up to about 1 million form excellent adhesive compositions which cure to high bond strengths. Acrylic monomers are preferred.

Abstract: A process is disclosed comprising laminating an anodically treated aluminum surface against a thermoset plastic substrate, whereby the surface of the substrate after chemically removing the aluminum has an improved affinity for the adherence thereon of electrolessly deposited metal films.