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Individual
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Individual
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Priority to ES8702794ApriorityCriticalpatent/ES2007118A6/en
Publication of ES2007118A6publicationCriticalpatent/ES2007118A6/en
The cardboard is placed on a conveyor belt with the corrugations vertical and carried through a zone where it is sprayed with molten paraffin wax or similar until satd. Excess wax is removed in a drying zone, e.g. by blowing with air, and the cardboard then cooled to solidify the wax which gives increased rigidity and much better water resistance.
ES8702794A1987-09-301987-09-30Saturation of corrugated cardboard with paraffin wax
ExpiredES2007118A6
(en)
PROCEDURE FOR THE PRODUCTION OF INJECTION PRINTED ITEMS WITH IMPROVED SURFACE CHARACTERISTICS, EQUIPMENT FOR THE EXECUTION OF SUCH PROCEDURE AND ITEMS SO OBTAINED