SU558085A1 - Bumjana mass for the manufacture of packaging material - Google Patents

Description

laboratory roll. At the same time, the grinding time and the degree of grinding of the mass are recorded, the strength of the web in the wet state according to Brecht and the interfiber bonding forces according to Ivanov are determined.

Known pulp has the following composition, weight. %:

Prefabricated, welded with neutral sulphite method 83.5 Cellulose sulphate unbleached 15, 0 Sizing agent 0.5 Precipitant1.0 The offered paper pulp has the following composition, weight. %:

The semi-finished product obtained using a mixture of mosposulfite and black sulphate liquor as a cooking solution84.0 Cellulose sulphate unbleached 15, 0 Precipitant1.0 Samples of corrugated paper are cast from the resulting paper masses.

Comparison of grinding parameters and results of analysis of paper samples are presented in Table. one.

Table 1

the wet state rises. It also eliminates the need for the addition of a glue agent.

PRI mme R 2. Under production conditions, paper for corrugating is produced from peutral sulfonic hemicellulose and fibrous iolufabrikaat obtained using a mixture of monosulfite and black sulfate lye.

The obtained semi-finished products are milled in two steps on the site of semi-mass grinding, sorted, washed and served on a two-stage mass of 1 mol to 25-27 ° ShR. Known pulp has the following composition, weight. %:

Prefabricated, brewed by neutral sulphite method 73.5 Cellulose sulphate unbleached 25, 0 Sizing agent 0.5 Precipitant1.0 The offered paper pulp has the following composition, weight. %:

The semifinished product obtained using as

a mixture of monosulphite and black sulphate liquor 89,0 Cellulose sulphate non-whitewash 10, 0 Osadptel1,0 The main process parameters and indicators of paper for corrugation are presented in Table. 2. T a b e c i a 2

Thus, when using a semi-finished product obtained using a mixture of monosulphate and black sulphate liquor, the physicomechanical indicators of corrugated paper are increased, and the energy consumption for grinding the pulp from this semi-finished product is reduced.

Consequently, when using cheap fiber semi-finished product obtained using a mixture of monosulfite and black sulphate liquor for warn, and the resultant high physicomechanical corrugation paper indicators, the grinding energy consumption decreases and

As can be seen from the presented data, when using a more benign semi-finished product obtained using a mixture of monosulfite and black sulphate liquor for cooking, the physicomechanical indicators of corrugated paper are increased, the energy consumption for grinding is reduced by 160 kwh / ton and the cellulose sulphate content is reduced.

Consequently, the proposed paper pulp for the manufacture of packaging material makes it possible to obtain high-quality corrugated paper from cheaper fiber raw materials while reducing the consumption of energy P1 and grinding and exclusion of the sizing agent.

Example 3. In laboratory conditions, the semi-finished product obtained by the glass-sulfite method and the semi-finished fibrous material, welded using a mixture of monosulfft and black sulfate liquor, are milled in two steps on a laboratory disk mill and a laboratory roll. At the same time, the grinding time, the degree of grinding of the mass are recorded, the durability of the web is determined in the wet state according to Brecht, and the intervolume bonding forces in Ivanov. Known pulp has the following composition, weight. %: Prefabricated, brewed by neutral-sulfite method 50.0 Cellulose sulphate unbleached 48, 5 Sizing agent 0.5 Precipitant1.0 The proposed paper pulp has the following composition, weight. %:

Semi-finished product obtained using a mixture of monosulfite and black sulphate liquor as a cooking solution 50.0 Cellulose sulphate pebelin 49, 0

The precipitator1.0.

Samples of cardboard for smooth layers of corrugated cardboard are cast from molded paper masses.

Comparison of grinding parameters and results of the analysis of samples of cardboard are presented in Table. 3

Table 3

Using a semi-finished product, which is welded with a mixture of monosulfite and black sulphate liquor, the physical and mechanical properties of the paperboard increase, and the energy consumption for grinding paper pulp using this semi-finished product is reduced, which is indicated by a reduction in the duration of grinding to a final mass development from 42-46 MiiH to 13-16 min, also eliminating the need for the introduction of a sizing Benj, ecTBa.

It should be noted that the content of the high-yield semi-finished product in cardboard grade K-1 and K-2 GOST 7420-69 is not standardized.

Example 4. Under production conditions, cardboard is produced for smooth layers of corrugated cardboard made from paper pulp, the composition of which consists of sulphate pulp and a high-yield semi-finished product, either with a finite or neutral sulphite method, or welded using a mixture of myosulphite and black sulfate liquor.

Known paper pulp has the following composition, weight. %:

Neutral sulfite brewed semifabrnat pulp method Cellulose sulphate nebele45 0.5 1.0 on

Sizing Warrior Osaditel

We offer pulp dough the following composition, weight. %:

Semi-finished product, obtained using black monosulfite and black sul54 .0 fatty liquor cellulose sulphate oil 45 .0 1.0 per precipitator as a boiling solution.

The main parameters of the process and cardboard indicators are presented in Table. four.

Table 4

Claims (1)

As follows from the presented data of the use of the fibrous semi-finished product obtained using cooking sulphite and black sulphate liquor for cooking, the physical and mechanical properties of the cardboard are new, and the consumption of energy by milling pulp using this semi-finished product is reduced by 139 kWh / t. It also eliminates the need for a sizing agent. The formula was invented and Paper pulp for the manufacture of packaging materials containing a fibrous and semi-finished product, impregnated unbleached 10 cellulose and a precipitator, characterized in that, with the increase of the wetness of the material in a wet state while reducing its cost, in the case of -5580, in the form of -5580 semi-finished product mass contains a semi-finished product obtained using as a cooking solution a mixture of monosulfite and black sulphate liquor, in the following ratio of components, weight. %: Fibrous semi-finished product 50.0-89.0 Sulfate non-bleached cellulose 10, 0-48.5 Precipitator1.0-1.5 Sources of information received during the examination with exertize 1. Express information "Pulp and paper industry, 1962 , ЛЬ 38, p. 7.