Abstract:
A hook or loop component of a hook and loop fastener having a textile ground sheet (16) and filamentary pile, the ground sheet (16) penetrated by a resinous binder of improved properties. Hydrolytically stable cross-linked bonds are formed in a binder under ambient or laundering conditions. Bonds of urea-, ureido-, or urethane-type result from curing of the hook or loop ground sheet (16) by exposure to water molecules, polyfunctional amines, or polyfunctional alcohols. The resin is applied as a hot-melt, as a neat liquid, or as a solute in a solvent. In a method for applying the resin as a hot-melt, a continuous strip of hook or loop elements is heated to approximately the same temperature as the melted resin and the melted resin is applied, using a coating head and coating knife, to a section of tape suspended between two support points. Other cross-link systems and thermoplastic systems are disclosed.
Abstract:
An industrial fabric, suitable for use as papermachine clothing, belting or a filter cloth, comprises a permeable support (11) carrying a layer of sintered polymeric particles (15), and a layer (16) providing a smooth surface coating. The surface of layer (16) has an RzD value equal to or greater than 50.
Abstract:
There is provided composite media and a method of producing them. The composite media contain a coalesced composite mixture of particles of an active ingredient (30) and binder particles (40). The binder particles preferably also fuse the composite structure to front (10) and back (20) substrates. The composite media also have stabilizing particles (50) that fuse with both the particles of an active ingredient and the substrates, thereby forming a composite medium according to the present invention.
Abstract:
A method for making sheets and/or plates that are thermoformable as of a temperature of 80-90 DEG C and heat-tackifiable as of 80-90 DEG C, and suitable for use as a heat-tackifiable reinforcing material. According to the method, 30-70 wt % of granules of one or more polymers that have a low melting point (50-90 DEG C) and are thermoformable as of 80-90 DEG C are mixed with 70-30 wt % of one or more polymers with a higher melting or softening point, in the form of granules or a powder having a particle size greater than around 500 mu m, and preferably of 500-1000 mu m, both kinds of polymers being thermoplastic and at least partially compatible, and optionally with the usual additives; the mixture is extruded under low-shear conditions at low temperatures of 100-140 DEG C to give a mixture having a pasty consistency that is insufficient to form a uniform mixture of molten polymers; and, after extrusion, and optionally once a fabric base (9, 12) has been added to the extruded product, said product is laminated or calendered at a high pressure and at a temperature of around 100 DEG C to reduce the thickness thereof, then cooled to less than 30 DEG C before the end of the lamination or calendering process.
Abstract:
A moist fabric of multifilament bundles is coated with a particulate solid material, which is fused and solidified to produce a fiber-reinforced composite web. Deep penetration of the fused resin is effected without need for pressure assistance.
Abstract:
With known methods for coating back-cloth with a synthetic powdery product, the back-cloth is subjected to heat treatments; either the length of cloth is used as a heat conveyor, or it is traversed by heat radiation. The present method allows to avoid this. Owing to a metering unit (2), the synthetic powdery product passes from a powder storage tank (1) to the powder dispensing and supply compartment (3) wherefrom it is distributed on a transport surface (5) by means of a scraper (4). Heat sources (7-9) operate without contact, directly to the synthetic powdery product arranged on the intermediary carrier. The back-cloth to be coated (11) is pressed by means of a pressure cylinder (10) against the intermediary carrier (5) where the mostly adhesive powder adheres immediately to the back-cloth (11).
Abstract:
A production method of synthetic and coated leather in general is disclosed, characterised in that it uses a micronized resin powder preferably with dimensions lower than 120 micron. Moreover, a micronized polyurethane elastomeric polymer powder with dimensions lower than 120 micron is disclosed. Advantageously, the said powder can be used to produce an eventually discontinuous sintered film, in particular for production of imitation leather material.