Abstract: A dispersion adhesive includes a co- or terpolymer having vinyl acrylate or vinyl acetate units or a copolymer dispersion of an acrylic acid ester and styrene and a high content of flameproofing agent based on compounds of aluminum and/or boron. Additives such as processing and thickening agents, suspending agents and wetting agents are added to the dispersion adhesives, and the dispersion adhesives furthermore can include preservatives, foam suppressants, dispersing agents, film formation agents and a drying retardant. The dispersion adhesives are particularly suitable for gluing rigid polystyrene foams in the form of films or sheets, but are likewise used for gluing gypsum plasterboards, wood and cork to a suitable substrate, and for gluing tiles and cement sheets.

Abstract: Open-cell plastic foam sheets with smooth, closed surfaces are heated up to a predetermined temperature after extrusion, are thermoformed in a thermoforming unit with the aid of a vacuum on both sides and are thermoset. One of the two closed surface skins of the plastic foam sheet is perforated with the aid of needles 4 arranged movably in a mold block 11. The mold block 11 is a component part of a thermoforming unit 10 and, together with a further mold block 9, forms the mold of this thermoforming unit. The mold block 11 for the inner side 13 of a plastic foam sheet 16 includes a male mold 1, a cooling plate 2, a vacuum plate 3, the movable needles 4, a needle plate 5, springs 6 for the return of the needle plate and also diaphragms 7 and a mounting plate 8, which are held together by screws 30.

Abstract: Open-cell plastic foam sheets with smooth, closed surfaces are heated up to a predetermined temperature after extrusion, are thermoformed in a thermoforming unit with the aid of a vacuum on both sides and are thermoset. One of the two closed surface skins of the plastic foam sheet is perforated with the aid of needles 4 arranged movably in a mold block 11. The mold block 11 is a component part of a thermoforming unit 10 and, together with a further mold block 9, forms the mold of this thermoforming unit. The mold block 11 for the inner side 13 of a plastic foam sheet 16 comprises a male mold 1, a cooling plate 2, a vacuum plate 3, the movable needles 4, a needle plate 5, springs 6 for the return of the needle. plate and also diaphragms 7 and a mounting plate 8, which are held together by screws 30.