The influenсe of structure and the weight of one square meter of elementary layers on properties of printing cardboard

Abstract

The comparative analysis of the received experimental data testifies that, properties of printing cardboard essentially depend on structure and the weight of one square meter of its elementary layers. We defined the preferable structure of top layer (40% of bleached softwood sulphate cellulose and 60% of white paper for recycling of mark МB-1), intermediate layer (40% of bleached softwood sulphate cellulose and 60% of white paper for recycling of mark МB-2) and primary layer (60% of modular paper for recycling of mark МС-5B and 40% of white paper for recycling of mark МB-1), the layers differ in the weight of one square meter. The printing cardboard possesses the demanded physicomechanical characteristics corresponded to ТURB 00280146.030-98 in that case when the weight of one meter square is 60 g for the top layer, 50 g for the intermediate and 130 g for the primary layer.