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2 256 019

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IPC

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Application

2004121848/12, 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.Uraeva O.S.Evlakhova R.A.Ogurtsova N.A.Makshakova I.B.Loginova T.V.Gul'Jants E.P.Zujkov A.A.Osminin E.N.Goroshnikov V.V.Kirsanov V.A.Volkova G.P.Shirankov G.F.Lisitsyn N.I.Foteev M.A.Emelin V.A.

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Holder

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

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

Abstract RU 2256019 C1

FIELD: paper-and-pulp industry.

SUBSTANCE: pulp for manufacturing mainly packaging cardboard contains sulfite cellulose, wood-pulp, and secondary fiber. Sulfite cellulose is, more particularly, bisulfite cellulose having rigidity 40-50 Kappa units, tear resistance 390-450 mN, and punching resistance 580-620 mN. Such bisulfite cellulose is obtained by pulping softwood at pH of cooking liquor 2.4-2.9, SO₂ concentration 5.0-5.5%, and temperature 155-157°C. Wood-pulp is the one subjected to chemical, thermal, and mechanical treatment and characterized by whiteness 60-65%. 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 2 256 019 C1

Authors

Mutovina M.G.

Bondareva T.A.

Fadeev B.A.

Tjurin E.T.

Volkov V.A.

Bondarev A.I.

Uraeva O.S.

Evlakhova R.A.

Ogurtsova N.A.

Makshakova I.B.

Loginova T.V.

Gul'Jants E.P.

Zujkov A.A.

Osminin E.N.

Goroshnikov V.V.

Kirsanov V.A.

Volkova G.P.

Shirankov G.F.

Lisitsyn N.I.

Foteev M.A.

Emelin V.A.

Dates

2005-07-10—Published

2004-07-20—Filed