Production process of low weight middle partition paper

Abstract

The invention provides a production process of low weight middle partition paper. The production process comprises the following steps: burdening, disintegrating, screening and purifying, concentrating, pulping, pulp preparing, flowing, forming, compound squeezing, drying, surface sizing, and coiling. In the burdening step, based on fiber quality and impurity content, OCC waste paper of differentgrades is matched according to the determined raw material ratio of a product; wherein the OCC waste paper comprises domestic waste paper and imported waste paper accounting for 10-30% of the total weight, and the imported waste paper comprises American waste paper, European waste paper and Hong Kong waste paper. Main physical indexes of the low weight middle partition paper produced by the production process are as follows: quantifying (60-65) + / -3g / m<2>; the tightness is greater than or equal to 0.50 g / cm<3>; the transverse ring crush index is greater than or equal to 3.0 Nm / g; the longitudinal breaking length is larger than or equal to 3.5 km, the water content is 7.5%-10.0%, and the water absorption is smaller than or equal to 50 g / m<2>. On the premise that the strength index of the product meets the use purpose, the quantification of the middle partition paper product is reduced as much as possible, under the condition of the same weight, the use area of the product is remarkablyincreased, and therefore development of low-carbon economy can be promoted.

Description

【Technical field】 [0001] The invention relates to a production process of pulping and papermaking, in particular to a production process of low-weight intermediate paper. 【Background technique】 [0002] From the perspective of pollutant emission reduction, the amount of fresh water used in waste paper pulping and papermaking is relatively small, and the pollution load and treatment difficulty of wastewater from waste paper pulping and papermaking are significantly lower than those of chemical pulping. Economic development, comprehensive utilization of resources and characteristics of cleaner production. [0003] Spacer paper refers to the spacer paper between the corrugated cores of corrugated cardboard made of unbleached pulp. From the structural analysis of corrugated cardboard, the contribution rate of its flat compressive strength and edge compressive strength mainly comes from corrugated paper, surface paper and bottom paper, and the interlayer paper mainly plays the r...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a production process of low-quantity intermediate paper, so as to overcome the shortcomings of existing high-weight products used for corrugated board intermediate paper and not being able to meet the needs of the current paper product packaging market

Images