Fixing of vacuum insulation panels in cooling apparatuses

A process for producing composites comprising a wall of a cooling apparatus, a PU foam layer and at least one VIP, which comprises the following steps:

• 1) laying of an outer wall or a wall of the inner container of a cooling apparatus on the lower flat boundary of a holding device in which the distance between lower boundary and upper boundary can be varied,
• 2) application of a liquid PU foam reaction system comprising
• a) organic and/or modified organic polyisocyanates together with
• b) at least one relatively high molecular weight compound having at least two hydrogen atoms which are reactive toward isocyanate groups and optionally
• c) low molecular weight chain extenders and/or crosslinkers in the presence of
• d) blowing agents,
• e) catalysts,
• f) foam stabilizers and optionally
• g) further auxiliaries and/or additives,
• where the components a) to g) are selected so that a polyurethane foam having a free-foamed density of from 50 to 1100 g/l and a compressive strength of greater than 15 kPa is obtained and rigid integral foams are excluded;
• over all or part of the area of the inside of the outer wall of the cooling apparatus or the outside of a wall of the inner container of the cooling apparatus in a weight per unit area of 300-9600 g/m2;
• 3) laying of at least one vacuum insulation panel (VIP) on the liquid PU foam reaction mixture,
• 4) closing of the holding device and
• 5) removal of the composite from the holding device after sufficient curing of the PU foam reaction mixture.