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2 233 929

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IPC

(21) (22)

Application

2003123528/12, 2003-07-29

(24)

Start date

2003-07-29

(22)

Actual filing date

2003-07-29

(45)

Published

2004-08-10

(72)

Inventor

Vishnjakov O.E.Pogodin S.P.Samozhenkov V.M.Sotnikov A.A.Khramov V.A.Manvelova N.E.

(73)

Holder

Zakrytoe Aktsionernoe Obshchestvo

CARDBOARD FOR FLAT LAYERS OF CORRUGATED CARDBOARD AND CONTAINER USING THE SAME Russian patent published in 2004 - IPC

Abstract RU 2233929 C1

FIELD: pulp-and-paper industry, in particular, production of flat corrugated cardboard layers for manufacture of cardboard for containers.

SUBSTANCE: cardboard is composed of upper, middle, lower fibrous layers and surface coat applied onto upper and/or lower layer. Upper fibrous layer includes 100% of waste paper. Middle and lower layers include waste paper and high-yield semi-finished product, that is, chemical-thermomechanical pulp having milling extent of 40-50⁰ Schopper-Riegler. Said pulp is produced by double-staged chemical processing with sodium hydroxide solution and, simultaneously, steaming in screw-type apparatus. Waste paper has milling extent of 50-55⁰ Schopper-Reigler. Coat weight is 0.2-2.5 g/m². Containers using above cardboard are described.

EFFECT: increased rigidity and strength characteristics of cardboard for flat layers of corrugated cardboard and containers.

3 cl, 2 tbl, 2 ex

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RU 2 233 929 C1

Authors

Vishnjakov O.E.

Pogodin S.P.

Samozhenkov V.M.

Sotnikov A.A.

Khramov V.A.

Manvelova N.E.

Dates

2004-08-10—Published

2003-07-29—Filed