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US 10,556,357 B2Granted
Splitting of thick hard-foam plates
AssigneeEvonik Roehm GmbH
InventorsThomas Richter, Kay Bernhard, Florian Becker, Felix Goldmann, Tim Denk, Ulrich Schmidt, Mathias Hempler
Life of this patent
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Abstract
The present invention relates to a method for cutting rigid foams, especially slabstock P(M)I foams. A method is provided here, by means of which it is possible to cut these rigid foams even in relatively high layer thicknesses of, for example, more than 3 mm, without material loss, which is produced in relevant amounts, for example, in the course of sawing as a result of the sawdust formed.
Claims15
A method for planar division of a rigid foam to obtain a film or thin sheet, said method comprising:
- flexibilizing the rigid foam to obtain a flexibilized foam, and
- cutting the flexibilized foam with a knife,
- wherein said flexibilizing of the rigid foam prior to cutting is accomplished by storing the rigid foam in water and/or heating or adjusting to a temperature in a range of from T-15° C. to T-1° C. where T is a foaming temperature of the rigid foam, and
- the rigid foam is a PE, PP, PVC, PMMA or P(M)I foam.
1 more element
Dependencies are inferred from the claim text.