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CARTONE LEGGERO PER UNO STRATO DICOPERTURA DI CARTONE PESANTE ONDULATO

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Title:
CARTONE LEGGERO PER UNO STRATO DICOPERTURA DI CARTONE PESANTE ONDULATO
Author: IGOR MASLOVIAC ; STEFAN UHRINA ; JAN JANCI
Subjects: IMPREGNATING OR COATING OF PAPER ; LAYERED PRODUCTS ; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM ; PAPER NOT OTHERWISE PROVIDED FOR ; PAPER-MAKING ; PERFORMING OPERATIONS ; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D ; PRODUCTION OF CELLULOSE ; PULP COMPOSITIONS ; TEXTILES ; TRANSPORTING ; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
Description: Cardboard for the outer layer of corrugated cardboard is prepared from a chemical pulp, or a semi-chemical pulp based on hard and soft woods, and a sulphated resinous pulp, with unsorted recovered paper, in the total mixt. ratio of between 2:1:2 and 2:2:1. In an example, the paper pulp is prepd. from a semi-chemical pulp comprising amixt. of 60% hardwood and 40% soft wood refined to 36 deg. SR by a neutral sulphate process and a process of fibrillation, an unbleached resinous sulphate pulp refined to 25 deg. SR, and an unsorted recovered paper refrined to 32 deg. SR in a ratio of 2:1:2. Among the hard woods, oak in particular represents a source of raw material which has not previously been used in papermaking. The invention provides an outlet for this wood in chemical and semi-chemical pulps in corrugated cardboard outer layers.
Creation Date: 1980
Language: Italian
Source: esp@cenet

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CARTONE LEGGERO PER UNO STRATO DICOPERTURA DI CARTONE PESANTE ONDULATO

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