SU426011A1 - COMPOSITION FOR PAPER COATING - Google Patents

Description

one

The invention relates to the field of the pulp and paper industry and concerns the manufacture of release papers that can be used in the manufacture of laminated plastics, paper, wet films, synthetic linoleum and other man-made materials.

The purpose of the invention is to manufacture paper with anti-adhesive properties.

This is achieved by the fact that the composition additionally contains an alkali salt of fatty acids in the following ratio of components by weight. %:

Liquid glass25--45

Alkaline salt fatty

acids 0,5-1

Water drain.

As the alkaline salt of fatty acids, the potassium or sodium salt can be used.

Example 1. 100 ml of liquid potash glass are diluted with 300 ml of water. 4.2 g of sodium salts of fatty acids are introduced into the resulting solution (fatty acids are the sum of fatty acids, resin, naphthenic sulfonic acids, aromatic sulfonic acids, non-washed fat, and non-washed organic substances that are part of the soap, which is equivalent to 6 g 7% O -Horo solid household soap). The addition is carried out with continuous stirring until a homogeneous mixture is obtained.

To speed up the process, the addition can be carried out at 60-80 ° C, and then, stirring, cool the resulting composition to room temperature.

; The base paper (weight 45 g / lg, smoothness of the front side is 400-500 s per 100 cm, grid side 300-400 s per 100 cm) is coated with the prepared release agent on one side and then dried at 100-160 ° С for 0.5-3 minutes The amount of applied anti-adhesive composition (in terms of dry residue) is 2-10 g per m of paper.

The release paper thus obtained separates, when pressed, decorative laminates at temperatures up to 160 ° C and pressures up to 120 kg / cm. One-sided coated paper can be used to separate once.

Example 2. The base paper (weight 40 g / m

smoothness of the front surface 500-1000 sec

per 100 cm and 600-700 seconds per 100 cm net

sides) are coated on both sides with an anti-adhesive composition prepared as in

example 1 and then dried at 100-160 ° C in

for 1-4 minutes

The amount of anti-adhesive composition applied (do not dry out to dry residue) is 5-15 g per lg of beverage.

The release paper so obtained can be used for separation more than once.

The subject is invented, and

Claims (3)

I. A composition for scrippery paper based on liquid glass, characterized in that, in order to produce paper having anti-adhesion properties, the composition finally contains an alkaline salt of fatty acids at the following ratio of components by weight. %: Liquid glass25-45 Alkaline salt of fatty acids 0,5-1 Water drain. 2. Composition on n. 1, characterized in that it contains potassium salt as an alkaline salt of fatty acids. Composition according to claim 1, characterized in that it contains sodium salt as an alkaline salt of fatty acids.