Abstract:
The invention relates to a two-side self-adhesive tape whose sides have different adhesive forces and are provided with at least one adhesive layer. Said invention is characterised in that the glue of the less adhesive layer is based on ethylene vinyl acetate copolymer whose vinyl acetate part in the copolymer ranges from 25 to 92 mass %. in a preferred embodiment from 40 to 70 mass %, the adhesive substance can be possibly mixed to additives such as adhesive resins, softeners, antioxidants and fillers.
Abstract:
The present invention relates to a self-adhesive sealant for sealing a silicone element onto an application site, comprising: a support; a layer of adhesive on that side of the support which is intended to come into contact with the application site; and a layer of an ultraviolet-curable silicone bonding agent on that side of the support which is intended to come into contact with the silicone element. It also relates to a silicone element provided with such a sealant and to a method of applying adhesive to a silicone element using this sealant.
Abstract:
A two-sided lamination tape for high quality face mounting of graphics. The tape has a very clear thermally activated adhesive surface on one side of a support film and a perfectly clear pressure sensitive adhesive on the other side. The tape is laminated to the image surface of a graphic by means of the clear, thermally activated surface. The laminated graphic can then be face mounted by means of the perfectly clear, tacky pressure sensitive adhesive side. The tacky, pressure sensitive adhesive allows momentary repositioning, giving the graphic user the ability to correct and smooth the mounted graphic. In the preferred embodiment, there is also a removable, protective film liner. This protective film allows storage of the laminated graphic and is peeled off just prior to use to expose the PSA layer.
Abstract:
A double-sided pressure-sensitive adhesive tape has a pressure-sensitive adhesive layer on the both sides of a substrate, wherein the pressure-sensitive adhesive layer on at least one side is a silicone based pressure-sensitive adhesive layer containing a polydiorganosiloxane, and a filler is added to the silicone based pressure-sensitive adhesive layer.
Abstract:
In a continuous two-stage process for preparing solvent-free polyacrylate hotmelt pressure sensitive adhesives which is gentle on the polymer and redeploys the solvent used in the process the following steps are carried out: polymerizing a self-adhesive pressure sensitive adhesive in solution, the solvent having a low vapor pressure; continuously mixing the polymer solution with antioxidants and preheating the mixture under superatmospheric pressure without boiling it; concentrating the polymer solution to a residual solvent content of less than 0.1% by weight in a concentrating extruder under the effect of reduced pressure and elevated temperatures; condensing, collecting, and re-using the solvent stripped off in the extruder; compounding the abovementioned solvent-freed hotmelt pressure sensitive adhesive with tackifying resins, fillers, stabilizers, crosslinkers or other additives in a second extruder at a moderate melt temperature; transferring the blended solvent-free self-adhesive pressure sensitive adhesive to a downstream coating unit.
Abstract:
Voids (26) at the interface of a printed circuit board (10) bonded to a heat sink (24) which impede heat transfer from a heat generating electronic component (12) mounted on the printed circuit board (10) to the heat sink (24), and thus limit the density of electronic components (12) that may be mounted to a given printed circuit board (10) are avoided by a method wherein the adhesive securing the printed circuit board (10) to the heat sink (24) is formed of a pressure sensitive adhesive layer (22) and a thermosetting adhesive layer (28). The latter fills the voids and thus provides for greater thermal conductivity from a heat generating component (12) to the heat sink (24) with the result in increase in heat rejection (30).
Abstract:
A sheet material comprising i) a pressure-sensitive adhesive film comprising an acrylic pressure-sensitive adhesive polymer, and ii) a release film comprising a polyolefin polymer having a density of no greater than 0.90 g/cc, the pressure-sensitive adhesive film being in contact with the polyolefin polymer.
Abstract:
A sheet material comprising i) a pressure-sensitive adhesive film comprising an acrylic pressure-sensitive adhesive polymer, and ii) a release film comprising a polyolefin polymer having a density of no greater than 0.90 g/cc, the pressure-sensitive adhesive film being in contact with the polyolefin polymer.
Abstract:
A sheet material comprising i) a pressure-sensitive adhesive film comprising an acrylic pressure-sensitive adhesive polymer, and ii) a release film comprising a polyolefin polymer having a density of no greater than 0.90 g/cc, the pressure-sensitive adhesive film being in contact with the polyolefin polymer.
Abstract:
Composite film adhesive including a layer of resin adhesive which is heat activatable for adhesion to plasticized resin and which is resistant to plasticizer migrating from the resin and a layer of phenoxy resin which is in strongly adhesive, overall engagement with the heat activatable resin and has active hydrogens for reaction with free NCO groups of a urethane adhesive to enable strong bonding of the phenoxy resin layer by the urethane adhesive.