FIELD: pulp industry.
SUBSTANCE: invention relates to pulp and paper industry. Sheet with ability to retain non-removable folds contains cellulose fibers, of which at least 75 %, preferably at least 90 % or more preferably at least 95 % of said cellulose fibers have fiber length of less than 1 mm. Ratio of ultimate tensile strength (MD/CD) of film exceeds 1.4, preferably exceeds 1.6 and most preferably exceeds 1.8.
EFFECT: improved ability to maintain unbreakable wrinkles.
25 cl, 1 tbl
| Title | Year | Author | Number |
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