SU500067A1 - Method of making paper laminate - Google Patents

Description

Kraft paper (base dp of the inner plastic layer) with the following characteristics is used for impregnation; weight 1 m 140-180G, thickness 0.23-0.35 mm, bolt {trna | Water absorption for 5 minutes B longitudinal direction 25-45 mm, breaking load in the transverse direction not less than 6 kgf, per-breathability 15-60 s Impregnation and drying is carried out on an impregnation (continuous sewing machines with the following technological parameters: Speed m / min 80-130 Temperature by zones, C 100-160 Content of your own in impregnated paper,% 25-40 Content of volatile in a pit: 1 paper %, .5-12 For propping up the heat indicated water fekopformaldehyde CBstoiyioiiiee. After that I type A package of blanks on crafgg magnet sheets hfopytana according to the described method.4 One sheet of decorative paper impregnated with mvaminoformaldet ndnym svyyushim, n pressed prn 140-15O C, get a decorative paper-spytoy plastic. Dims & g / cm Thickness, mm Limit of 1y-bend, KGS / CM Water absorption,% Resistance to water, increase in telescope, change in external appearance without changes Thermal stability and resistance to salinity g of surface contaminants front plastic. Form 3 and 3 o B e V e n i, A method of manufacturing a paper-laminated plastic by impregnating a paper with phenofformaine, drying, drying a set of packets of impregnated sheets of paper, pressing at elevated temperatures and pressures, and m This is because, in order to intensify the process, carry out the impregnation without the use of organic solvents and save energy, they take an aqueous phenopformaldehyde binder with a 45-55% concentration (dry residue), and-cyuikyl propelling is carried out at a rate of 80130 m / min.