Paper pulp for the manufacture of bases waxed paper

 

(57) Abstract:

The invention is intended for use in the pulp and paper industry, in particular, in the manufacture bases of waxed paper, which after printing and waxing is produced can be used for the outer swivels confectionery. Paper pulp contains bleached coniferous sulphate pulp, filler is titanium dioxide and polyacrylamide, as a sizing agent is a modified starch, the components of paper pulp are in the following ratio, wt. %: the filler is titanium dioxide-5-10, modified starch - 0,8-1,8, polyacrylamide - 0,03-0,15, pulp bleached coniferous sulphate - rest. Improved paper quality by increasing its mechanical strength while maintaining the printing properties, increases the relative elongation of paper and consumer properties. Thanks to the invention, the paper gets elasticity not only by increasing the mobility of interfiber bonds, but also due to the elasticity of the fibers. table 2.

The invention relates to the pulp and paper industry, in particular to the composition of the paper pulp, the purpose is t to be used for the outer swivels confectionery machines.

Famous paper pulp for the manufacture of bases waxed paper containing 100 wt.% bleached Kraft pulp, however, is made using paper on key indicators inferior to the proposed technical solution. Due to the lack of filler paper after waxing is produced becomes transparent, thereby deteriorating its appearance. No sizing and low density contributes to increased absorption when waxing, which also affects its marketability and consumer properties (1, 2).

The closest technical solution with respect to the proposed solution is paper pulp for the manufacture of bases waxed paper label containing the filler, which helps maintain its opacity when waxing. However, used as a sizing agent, rosin size, gives the paper hydrophobicity, which prevents uniform penetration of moisture into the fibers during rewetting, is not achieved their desired elasticity and, consequently, the relative elongation of the paper, which is one of the main in the evaluation of consumer properties of paper (3).

The invention consists in that paper pulp for the manufacture of bases waxed paper contains as a sizing agent, modified starch, the components of paper pulp are in the following ratio, wt.%:

The filler is titanium dioxide - 5-10

Modified starch - 0,8-1,8

Polyacrylamide - 0,03 - 0,15

Pulp bleached coniferous sulphate - Rest

The proposed pulp is produced as follows. Cellulose dissolve in the pulper or served with liquid flow in the pool unground mass, where the mass is fed to the grinding. The settings of the mass is obtained by proper selection of operating parameters and milling equipment, in particular the duration of the grinding mass and volume of specific pressure. Filler and starch adhesive is metered in undiluted pulp, and polyacrylamide - after dilution of the circulating water before serving mass on the grid paper machine.

Specific examples of the composition of paper pulp basis waxed paper p is s brand fundamentals of waxed paper Rolland" (France), "Twisting" (Italy), "Eurex" (Finland).

Properties of the paper are summarized in table 2.

The proposed technical solution, use as a sizing agent, modified starch increases the mechanical strength of paper. In addition, the sizing starch glue does not reduce the hydrophilicity of the paper and in this case, when the plasticization of paper before waxing the aqueous solution of the plasticizer penetrates not only between the fibers of the paper, but in the capillary fibers. In the paper acquires elasticity not only by increasing the mobility of interfiber bonds, but also due to the elasticity of the fibers. This property of paper is estimated by the growth rate of relative elongation of the paper, as well as improving its consumer properties, manifested in the process of its processing on automatic lines.

Thus, the applied composition paper pulp with the optimal settings for the training provides a level of quality basics waxed paper, not inferior to the above foreign counterparts.

Sources of information:

1. GOST 16711-84 "the Basis of waxed paper.

2. "It is against the certificate of the USSR N 1532632, D 21 H 5/00, 1989.

Paper pulp for the manufacture of bases waxed paper containing bleached coniferous sulphate pulp, filler is titanium dioxide, a sizing agent and polyacrylamide, characterized in that as a sizing agent used modified starch, the components of paper pulp are in the following ratio, wt.%:

The filler is titanium dioxide - 5 - 10

Modified starch - 0,8 - 1,8

Polyacrylamide - 0,03 - 0,15

Bleached coniferous sulphate pulp - Other

 

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