JPH05247896

PURPOSE:To obtain paper good in barrier properties, transparency and dimensional stability by coating the surface of base paper composed of wood pulp having a specific beating degree with a mixture solution containing PVA, a starch hydrolyzate and a filler with a size press, then drying the coated p...

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Bibliographic Details
Main Authors ONISHI TORU, MORIO SADAKAZU
Format Patent
LanguageEnglish
Published 24.09.1993
Edition5
Subjects
IMPREGNATING OR COATING OF PAPER
PAPER NOT OTHERWISE PROVIDED FOR
PAPER-MAKING
PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D
PRODUCTION OF CELLULOSE
PULP COMPOSITIONS
TEXTILES
TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Summary:PURPOSE:To obtain paper good in barrier properties, transparency and dimensional stability by coating the surface of base paper composed of wood pulp having a specific beating degree with a mixture solution containing PVA, a starch hydrolyzate and a filler with a size press, then drying the coated paper and calendering the dried paper. CONSTITUTION:The objective paper excellent in barrier properties, transparency and further dimensional stability is obtained by coating the surface of base paper composed of 85-100wt.% wood pulp having >=350ml CSF beating degree with a mixture solution containing 2-6wt.% polyvinyl alcohol, 5-15wt.% starch hydrolyzate having <=200000 average molecular weight and 2-15wt.% one or more fillers such as clay, kaolin, talc, calcium carbonate, silica and aluminum hydroxide so as to provide 2-10g/m coating weight expressed in terms of solid content with a size press, then drying the coated paper and subsequently calendering the dried paper with a machine calender or a supercalender. This paper has >=5000sec air and 50-80% opacity.
Bibliography:Application Number: JP19920086439