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2 256 018

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IPC

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Application

2004121847/12, 2004-07-20

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Start date

2004-07-20

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Actual filing date

2004-07-20

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Published

2005-07-10

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Inventor

Mutovina M.G.Bondareva T.A.Fadeev B.A.Tjurin E.T.Volkov V.A.Bondarev A.I.Gul'Jants E.P.Uraeva O.S.Evlakhova R.A.Ogurtsova N.A.Loginova T.V.Shirankov G.F.Zujkov A.A.Osminin E.N.Goroshnikov V.V.Makshakova I.B.Kirsanov V.A.Volkova G.P.Van'Chikov N.K.Lisitsyn N.I.Foteev M.A.

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Holder

Otkrytoe Aktsionernoe Obshchestvo Nauchno-Issledovatel'Skij Institut Bumagi"Otkrytoe Aktsionernoe Obshchestvo Tselljulozno-Bumazhnyj Kombinat" Tskb")

PULP FOR MANUFACTURING PACKAGING MATERIAL Russian patent published in 2005 - IPC

Abstract RU 2256018 C1

FIELD: paper-and-pulp industry.

SUBSTANCE: pulp for manufacturing mainly box-destination cardboard contains sulfite cellulose, wood-pulp, and secondary fiber. Sulfite cellulose is, more particularly, bisulfite cellulose bleached to 84-86% and having rigidity 30-35 Kappa units, tear resistance 430-460 mN, and punching resistance 430-460 mN. Such bisulfite cellulose is obtained by pulping mixture of softwood and foliferous wood at pH of cooking liquor 1.6-2.3, SO₂ concentration 6.0-6.5%, and temperature 145-152°C. Wood-pulp is the one subjected to chemical, thermal, and mechanical treatment and characterized by whiteness 72-75%. Secondary fiber is ground paper waste with specified degree of grinding, optionally in the form of blend of differently ground marks.

EFFECT: improved strength characteristics and reduced manufacturing expenses.

4 cl, 1 tbl, 4 ex

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RU 2 256 018 C1

Authors

Mutovina M.G.

Bondareva T.A.

Fadeev B.A.

Tjurin E.T.

Volkov V.A.

Bondarev A.I.

Gul'Jants E.P.

Uraeva O.S.

Evlakhova R.A.

Ogurtsova N.A.

Loginova T.V.

Shirankov G.F.

Zujkov A.A.

Osminin E.N.

Goroshnikov V.V.

Makshakova I.B.

Kirsanov V.A.

Volkova G.P.

Van'Chikov N.K.

Lisitsyn N.I.

Foteev M.A.

Dates

2005-07-10—Published

2004-07-20—Filed