Process for the production of sandwich elements from reactive plastics material

A process for the continuous production of sandwich elements containing (i) an upper outer layer and (ii) a lower outer layer and (iii) a layer of cellular reactive plastics material lying between (i) and (ii) and securely joined to (i) and (ii) comprising:

• a) conveying (i) and (ii) in a longitudinal direction in a manner such that a gap extending in the longitudinal direction is formed between (i) and (ii),
• b) applying a reactive mixture to (ii), and
• c) contacting the reactive mixture with at least one guide element positioned between (i) and (ii) and extending over the width of (i) and (ii) as the reactive mixture rises and before the reactive mixture comes into contact with (i),
• d) allowing the reactive mixture to completely react, and
• e) recovering the sandwich element.