Abstract: A process for the coating of metal tubes by the application of polyethylene to the preheated tubes, a polyethylene with a melt index of over 1 g/10 minutes being applied first to the pre-heated metal tube and a polyethylene with a low melt index being applied thereupon, the process comprising a first step of applying a polyethylene with a melt index of 1.2 to 70 g/10 minutes (190.degree. C./2.16 kg) to the metal tube which has been pre-heated to a temperature of at least 200.degree. C., a second step in which the coating is cooled to a temperature of about 110.degree. to 170.degree. C. and a third step of applying a self-supporting film of polyethylene with a melt index of 0.1 to 7 g/10 minutes at this temperature so that the total coating has a minimum layer thickness of 1.5 to 4 mm and a coated article coated according to said process.

Abstract: A hose resistant to deformation is described which includes the usual polymeric tube and outer cover, and at least one annular reinforcement layer of fiber bundles sandwiched between the tube and cover. A polymeric aqueous-insoluble continuous film impregnates the fiber bundles and binds the reinforcement to at least one of the cover and tube, the continuous polymeric film serving to unexpectedly stiffen the hose appreciably. A method for producing the hose is described wherein the adhesive film is formed by applying a latex dispersion to the hose tube and/or reinforcement.

Abstract: A protective coating adhered to the surface of a metal substrate such as a pipe using an adhesive composition containing an adhesive component and a polyhydroxy compound protects the substrate from corrosion. The adhesive has improved resistance to cathodic disbonding which generally weakens the adhesive bond between the protective coating and the substrate when a current is impressed through the substrate causing it to function as a cathode. The electric current inhibits loss of metal ions from the substrate to the environment thus reducing corrosion of the substrate.

Abstract: In a pipe coating made by wrapping the pipe with polyolefin tape and a butyl rubber based adhesive, the strength of the bond to the pipe at elevated temperature is improved by incorporating in the adhesive a cross-linking agent which is either 0.15-1% by weight of p-dinitrosobenzene or 1.0 to 2.5% of p-quinonedioxime, or both together with an activator.

Abstract: Thermoshrinkable or thermoexpansive tubes for corrosion prevention or lin of piping are disclosed which have their inner and/or outer walls covered with at least one protective cover to keep them clean from dust, dirt, water or any other foreign matter which might interfere with adhesion to the pipe connection, thus causing corrosion or poor lining.

Abstract: A composite pressure sensitive adhesive construction contains a central release liner, a layer of an adhesive on each side thereof, and an exterior release liner on at least one of the adhesive layers. The central release liner and the exterior release liner contain release coatings on surfaces thereof which contact the adhesive layer. The composite construction may be made up in the form of a roll for easy dispensing or in the form of a precut tape. The pressure sensitive adhesive construction is generally useful for making any type of sealing connection wherein an initial releasable connection is desired. For example, the pressure sensitive adhesive construction may be utilized in sealing pipe insulating jackets wherein the exterior release liners are removed and the adhesive construction is applied to the opposite longitudinal ends or sides of the insulating jacket cover.

Abstract: A low profile heat sealing iron for use in applying heat activatable tape in areas of very limited access, such as the sealing of periodic joints in air duct is disclosed. The low profile sealing iron requires only a few inches or less of clearance and has a tape guiding means that feeds the tape to the proper location for heat sealing as the iron is slid along the surface of the member on which the tape is being applied. Preferably, the iron has a handle of adjustable length which permits the sealing iron to be used on ducts measuring six to eight feet or more when the handle is extended, but having a handle only about three feet long or less for easy carrying and handling at other times. A method of using the low profile sealing iron to seal joints in air ducts is also disclosed.

Abstract: An improved elongate deformable tube for use in the conveyance of fluids and/or fluid transmission signals under pressure having a bore therethrough enclosed by a composite annular wall comprising a seamless, as welded, or welded and drawn inner tubular shaped layer made from a metallic material and an outer tubular shaped layer made from a polymeric material. The walls of both the inner and outer layers are substantially uniform in radial thickness around their circumferences with the radial wall thickness of the outer polymeric layer being 50% or more than the total radial thickness of the composite wall of the tube. The outer layer is preferably formed about the inner layer by means of an extrusion process.

Abstract: A process for producing a laminate comprising a metal sheet having thermoplastic material on both sides thereof is described. The thermoplastic material is calendered to produce an upper thermoplastic sheet and a lower thermoplastic sheet. A metal sheet is fed into the nip between the calender rolls in order to contact the metal sheet simultaneously with the upper and lower thermoplastic sheets, thus producing a laminate. Processes for producing a pipe-wrapping material, a roofing structure and a solvent-welded joint are also provided.

Abstract: A polymeric hose and method of making same are provided wherein such hose comprises an inner base tube, a reinforcing braid made of aramid yarn disposed concentrically around the base tube with the aramid yarn having great affinity for water, a cover tube disposed concentrically around the reinforcing braid, and a moisture-impervious tubular film disposed between the braid and cover tube with the film isolating the aramid yarn and resulting in a tubular zone between the braid and cover tube free of water moisture created bubbles.

Abstract: A fluid adhesive composed of phenol formaldehyde resin and sufficient di(alkyl Carbitol) formal, where the alkyl radical contains from 1 to about 12 carbon atoms and yields a fluid composition, this fluid composition permits an elastomeric hose having an innertube of nylon to be adhered to a sulfur curable elastomer. This is reinforced by textile braid and covered with suitable Neoprene cover. This hose is suitable as a pressure hose in refrigeration or automotive uses.

Abstract: A method and means of insulating water-cooled pipes in a reheating furnace for metal workpieces. The pipes are wrapped with flexible ceramic fiber blankets held in place with an organic adhesive capable of withstanding temperatures up to about 500.degree. F.

Abstract: A flexible hose construction and method of making same are provided wherein such hose construction comprises a flexible nylon-11 base tube, a braided reinforcing layer disposed around the base tube, and a layer of adhesive means between the base tube and reinforcing layer consisting of a mixture of a urethane prepolymer and a cross-linking material (4,4'methylene-bis-chloroaniline) defining the sole means bonding the braided reinforcing layer to the base tube.