Novel low-density synthetic paper and preparation process thereof

Abstract

Provided are novel low-density synthetic paper and a preparation process thereof. The existing prepared high calcium carbonate product stone paper is high in density, super high in strength and large in specific weight, cannot be cut for processing easily and influences promotion and application. Novel low-density synthetic paper is composed of mixed stone powder containing certain proportion of porous materials, polyethylene and adhesives, and the proportion is that: mixed stone powder: polyethylene: adhesives= 50%-94%: 40%-5%: 10%-1%. The proportion of the mixed stone powder is that: porous materials: calcium carbonate=0-100%-100%-0. A certain amount of mixed stone powder is added in high-speed mixer for stirring, and proper liquid coupling agent, paraffins, stearic acid and poly ethylene (PE) wax are added in the mixer after the temperature rises to about 110 DEG C to obtain activated mixed stone powder. Then according to different requirements for strength and density of the synthetic paper, activated mixed stone with certain amount and high-pressure polyethylene are hot melted and mixed for granulation, then low-density synthetic paper is prepared through a film-blowing process, a rolling process or a flowing process.

Description

Technical field: [0001] The invention belongs to a method for producing paper. Background technique: [0002] Papermaking is one of the four great inventions in ancient my country and an outstanding creation in the history of human civilization. However, in the 21st century, with the sharp reduction of the earth's forest area, four tons of wood chips are needed to produce one ton of traditional wood pulp paper, which is equivalent to cutting down 23 large trees. Wood, as the main raw material for traditional papermaking, is becoming increasingly scarce. Relevant data show that my country's paper industry currently consumes more than 10 million cubic meters of wood annually, while my country's forest coverage is only 1 / 4 of the world average. my country's forest area has decreased sharply by 23% in the past 10 years, and the logging stock has decreased by 50%, which makes my country spend a lot of foreign exchange to import wood pulp every year. At the same time, in the tr...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for preparing a new type of low-density synthetic paper, which solves the problems of high density and ultra-high strength of the current high-calcium carbonate product "stone paper"