SU598996A1 - Packaging board - Google Patents

Description

(54)

TARNEY CARDBOARD

The invention relates to the production technology of high-quality containerboard used for smooth layers of corrugated paperboard, and can be used in the purpose of paper and paper packaging. It is known that containerboard is made of a two-layer coniferous sul of a cellulose of normal yield (48-50%) for the cover layer and an increase in yield (52-53%) for the base layer. The cover layer of cardboard is glued in the mass with a canyonol adhesive in the amount of 0.8-1%. The disadvantages of such cardboard are high cost due to the insufficiently high yield of cellulose for the MAIN layer and the use of cellulose only from coniferous wood, and it does not satisfy m on one of the most important indicators of containerboard - ring support stiffness. When one of the main modern tendencies in the production of containerboard is realized, the reduction in weight of level I is 125 g / m and lower the resistance to ring support compression of said cardboard even more or more. This happens because the long fiber conifer sulphate pulp of normal output cannot provide a sufficient level of rigidity of containerboard. The aim of the invention is to reduce the weight of the cardboard with an increase in the index of the annular support rigidity and reduce the cost of its production. . This is achieved by the fact that the main layer of cardboard additionally contains birch sulphate hemicellulose with hemicellulose content of 21-24% and lignin 7-8% h. As a coniferous semi-finished product, it contains pine hemicellulose content of hemicellulose of 7.2-9.0%. and lignin 15–18% with the yield of both hemicelluloses 60–62% with a grinding degree of 20–23 CR, with the following ratio of components, weight%: Pine coniferous sulfate unbleached cellulose with a yield of 48–50% 19.8–19.84 Berezova sulfate hemicellulose yield of 60-62% .24-56 Pine hemicellulose with yield of 60-62% 24-56 Rosin kei0.16-0.20

Examples of formulations of the proposed potato, wt.%: I Pine cone sulphate non-bleached cellulose

with a yield of 48-50% 19.84

Birch sulphate hemicellulose

with VYZ ODOM-60-62% 24.00

Pine sulfate semi-cellulose

with the release of 60-62% 56.00

Rosin glue 0,16

2. Pine coniferous sulphate-nebelin cellulose

with the release of 46-50% 19,82

Birch sulphate hemicellulose

with a yield of 60-62% 24.00

Pine sulfate hemicellulose

with success 60-62% 56.00

Rosin glue 0,18

3. conifer sulphate unblena. Cellulose

with a yield of 48-50%

Birch sulphate pulp

with the release of 60-62% 56.00

Pine sulfate semi-cellulose

with a yield of 60-62% 24.00

Rosin glue0,18

4:, - Khvovnad.I1, Fatna. Unfinished Cellulose

with the release of 48-60% 19.8

Birch sulphate pulp with a yield of 60-62% 40.00

Sosnov.a sulfate hemicellulose with

10-12% yield 40.00

Rosin glue0,2

fe table is given characteristic. , according to such indicator as front board .. 45 support stiffness, which, as you can see

The main application of this two from the table, better than the prototype of the failed cardboard, is found in use. .

his calling in the production of three- / n ---. Use of sulphate half-cell: seven-, etc. ply corrugated vines with a yield of 60-72% of pine and cardboard for the interior of the intermediate 50 birch wood in the manufacture of layers that use paper for cardboard, will allow for corrugation. economic effect due to the difference

The main criterion for estimating the use of pulp for the main layering properties of containerboard is 8% and for | replacing 50% softwood coniferous layers of corrugated pulp to arton 55 of the hardwood in the base layer is its ability to process cardboard; Taking into account the significant reduction on corrugated machines and the quality of the composite material of 1 m (from 150-175 kaaEns produced from it, five -, semi-,; can get additional; econoi etc. ply corrugated paperboard (combined effect.

18

150

21 150

15,125

Claims (1)

Invention Formula Container board consisting of a topcoat containing softwood sulphate unbleached pulp with a yield of 48-50% and rosin glue, and a base layer containing coniferous prefabricated, characterized in that, in order to produce lightweight cardboard with a circular indicator support stiffness and cheapening of the target product, the base layer additionally contains 6epe3ilD sulfate hemicellulose with a hemicellulose content of 21-24% and lignin 7-8%, and as a coniferous semi-finished product - basic hemicellulose containing, gallscale vines 7,2-9,0% and lignin .15-18% yield .obeih semi g 300-400 250 250 cellulose 60-62% and with a degree of grinding 20-23 SR with the following content of components, BEE.%: Pine Sulphate unbleached pulp with a yield of 48-50% 19.8-19.84 Berezova sulfate hemicellulose with vyhrfem 60-62% 24-56 Pine semi-cellulose with the release of 60-62% 24-56 Rosin glue 0,16-0,20 Sources of information taken into account in the examination: . 1.1- M-C6haan Paper, coit-ton at ceeeotosa 1965, T.14, 6, p. 63-66.