Abstract: Solid lignocellulosic material is bonded together by heating and pressing with a bonding composition comprising at least one carbohydrate and an acid capable of catalysing hydrolysis of the carbohydrate, for example to make plywood or particle board.

Abstract: An improved method is described for thermally bonding contacting pieces of a thermoplastic material provided in a variable volume confined space surrounded by a combustible gas. The combustible gas is ignited and explosion diffused externally of the pieces of thermoplastic material and thus heats the pieces without damage sufficiently to produce interbonding when the heated pieces are compacted in the confined space. The heated pieces are compacted isostatically or non-isostatically using various apparatus which reduce the volume of the confined space. Preferably a moveable piston is provided in a cylinder to form the confined space for the pieces. The driving means for the piston can be a combustible gas which is ignited or non-combustible gas under pressure or a resilient means or other mechanical means. The products of the method are in the form of a porous mass composed of the interbonded pieces which are undamaged by the explosion.

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 cork wall covering includes a sheet of cork sandwiched between and adhesively secured to a backing material on one side and a polymerized vinyl resin material on the opposite or facing side.

Abstract: Wafers to be processed are mounted to a lapping plate of a lapping machine using a photosensitive thermoplastic material, such as a photoresist. In a preferred embodiment, the wafers are laminated to a dry film photopolymer disposed on a carrier sheet, after which the sheet is secured to the lapping plate using a pressed-fit hoop that stretches the carrier sheet across the surface of the lapping plate and holds the sheet secure about the perimeter of the plate.

Abstract: An electronic digital display scale with a label printer adapted to weigh an article, to print a measured weight of said article on a label and to adhere said label onto said article weighed, wherein the printed label is held by a label transfer device by means of adhering or suction and transferred to an applying position outside a frame, thereby said label is applied to the weighted article by depressing said weighed article against the label retained by said label transfer device.

Abstract: A sealing apparatus for joining container parts of a plastic-lightweight metal foil laminate by heat and pressure applied to the laminates when the respective plastic layers are pressed into contact uses a toggle linkage and a yieldable buffer, with a hydraulic actuator to drive the toggle linkage to close a pair of sealing heads together. The toggle linkage permits build-up of pressure to a value predetermined by the construction of the buffer, after which the buffer yields to hold the sealing pressure. The duration of the build-up to sealing pressure comprises no more than 20% of the time interval between initiation of pressure build-up and the start of pressure drop-off at the end of the sealing process.

Abstract: Discrete particles consisting of thermoplastic synthetic resin, which are adapted to melt and to produce a high frequency weld joint under the action of a high frequency field and to resist the action of detergents and dry cleaning agents are arranged on at least one boundary surface of a support structure which is permeable to gas, vapor and liquid, and which is preferably constituted by a continuous web to which the particles are preferably fixed by the application of pressure and/or heat. An additional layer, preferably also consisting of a continuous web, is then applied to the one boundary surface of the support structure and the thus-formed composite structure is subjected to the action of a high frequency field to provide a welded joint connecting the additional layer to the support structure.

Abstract: A linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 40% of the acid moiety being a terephthalic acid moiety, said polyester containing moieties of 1,4-butanediol and 1,6-hexanediol, the ratio of the 1,4-butanediol moieties to 1,6-hexanediol moieties being 10:90 to 90:10; the use of such polyesters as a fusion coating mass, particularly in securing textile substances to a substrate.

Abstract: A process for welding a pair of thermoplastic workpieces by hot gas ejecting, which includes the steps of (a) positioning a pair of works to be welded in opposed relation with each other, (b) positioning heat blast nozzles between the works, (c) ejecting heat blast from the nozzles to the opposed surfaces of the works, (d) retracting the nozzles from the position between the works (e) advancing one of the works to be in pressure contact with the other, and (f) pressurizing the two works for firmly combining the two.

Abstract: The invention relates to copolyamides containing caprolactam, lauriclactam and 11-aminoundecanoic acid, useful as heat sealing agents.

Abstract: Photographs and other indicia-bearing opaque sheets of paper are laminated to molded articles by:(a) positioning the opaque sheet of paper betweeen two flexible sheets of uncured catalyst-containing thermosetting melamine-formaldehyde condensation product, to form a layup;(b) applying the layup to a surface of a shaped three-dimensional article formed of a partially cured catalyst-containing thermosetting melamine-formaldehyde molding resin, with the indicia-bearing surface of the opaque sheet facing away from said article; and(c) applying heat and pressure to the assembly to cure the condensation product and complete the cure of the partially cured resin.

Abstract: A method for joining foils which includes the steps of mechanically coating at a high speed at least one of the foil sides to be joined with a reaction product of a hydroxy-functional polyethers or polyesters with polyisocyanates or polyisothiocyanates, said reaction product containing free --NCO or --NCS groups and being reactable with H-acid compounds, and subsequently laminating foils. The reaction product has an average molecular weight of from about 500-10,000 and a --NCO or --NCS group content of from about 1-10% by weight, is substantially solvent-free when applied and has a viscosity of at most 60 Pas under application conditions. The temperature of the reaction product application conditions is adjusted to at most 140.degree. C but not less than a temperature which is so far below the temperature of the ambient air that air humidity will be condensed in the reaction product to be applied in such an amount that its pot-life would drop the value required for the implementation of the method.

Abstract: A rapidly curable phenol-formaldehyde resin is provided in the form of an emulsion which has particular utility in panel board production, particularly waferboard production.

Abstract: A flexible, fully cured, resin-impregnated sheet material useful as a surface-covering laminate product, particularly on particle boards, and the process of preparing such sheet material and the laminate product, which sheet material is prepared by providing a thin, fibrous sheet material impregnated with a curable, thermosetting resin; applying onto one surface of the resin-impregnated sheet material a layer of a compatible resin adhesive material; and subjecting the resin-impregnated coated sheet material to high pressures of over about 20 kilos per centimeter square at a resin-curing temperature for a period of time to provide a thin sheet material characterized by a nonporous, cured, resin-rich, face surface free of adhesive, and an adhesive-rich back surface, the sheet material being flexible and capable of being handled without fracture thereof. The flexible sheet material is secured by adhesively bonding the material to a substrate, such as a particle board, for use as a surface covering.

Abstract: Alcohols preferably having a pka below that of propanol-1 are heated with certain heterocyclic phosphites to give phosphonates and certain heterocyclic phosphonites, to give phosphinates. If small amounts of alcohols are employed, the products are generally polymeric in nature whereas if larger amounts of the alcohol are employed, there is generally ring opening to the simpler monomer, or isomerization to the phosphonate or phosphinate. The products are useful as fire retardants and as adhesives for glass. Pentaerythritol phosphite can be self-polymerized by such heating to form the adhesive polymer.

Abstract: A two part adhesive composition characterized by rapid curing and long shelf life is disclosed. The adhesive composition comprises a first component of an acrylic monomer and copper saccharinate or saccharin and a soluble copper salt and a second component comprising an alpha-hydroxy sulfone or an alpha-amino sulfone or mixtures thereof which functions as an activator therefor.

Abstract: An aggregate product comprising an aggregate, such as alumina of a size from about 1/2 inch to about 60 mesh, is bonded in a substantially continuous layer by means of conventional adhesives to a strip of fine mesh, such as nylon mesh. A viscous adhesive, such as a two-component epoxy resin, applied to the surface to be covered, bonds the aggregate-containing mesh to such surface.The method of this invention comprises coating a surface with a viscous adhesive, placing over such surface the aggregate-containing mesh, initiating pressure so as to cause settling of the aggregate-containing mesh into the viscous adhesive, and allowing the adhesive to bond the aggregate-containing mesh to the surface. Preferably, the adhesive is sprayed or rolled onto the surface and the aggregate-containing mesh is rolled out over the wet adhesive using a tape or string attached to the roll to propel it from a rolled-up position.

Abstract: An improved flexible splice is provided which is useful in joining segments of a substantially flat band (e.g., a flat tow) of an acrylic fibrous material in an end to end relationship. Such acrylic fibrous material subsequent to splicing, is passed through a heated thermal stabilization zone and thereby undergoes an exothermic cyclization reaction of pendant nitrile groups present therein. More specifically a silicone rubber adhesive is applied to the surfaces of the ends of each band segment and thereafter bonded preferably under elevated temperatures and pressure to form a splice through which the exothermic heat of reaction is effectively dissipated to an extent sufficient to avoid a deleterious effect on the original fibrous configuration which might otherwise result in the absence of such dissipation.

Abstract: Cleaning imaging material from a xerographic imaging surface with a cleaning blade with reduced friction between the blade and the surface is provided without image degredation by an appropriately roughened surface, which roughness is formed on the photoconductive surface by substrate pre-etching to provide a final or post coated roughness pattern of 3 to 5 microns and less than 20 microns.