Stone paper made of calcium carbonate

What is stone paper?  

Stone paperrefers to a new material between paper and plastic, with large reserves and wide distribution of limestone mineral resources as the main raw material (calcium carbonate content of 70-80%), with polymer polymer as the auxiliary material (content of 20-30%), using the principle of polymer interface chemistry and characteristics of polymer modification,  Made type polymer extrusion, blowing process, the inorganic powder environmental protection new materials stone paper products have the same writing performance and plant fiber paper and printing effect, has the plastic packaging is the core of the performance, can replace traditional partial functional paper, specialty paper, and can replace most of the traditional plastic packing materials.  

From the introduction, stone paper has a strong sense of environmental protection. The manufacture of stone paper products does not need water washing, nor does it need strong acid, strong alkali and bleach. Therefore, there is no problem of wastewater discharge, no pollution of rivers, seas and other water resources, and the energy consumption in the process is lower than that of traditional wood pulp paper.  Helping to reduce global warming caused by carbon dioxide (CO2).  

Stone paper costs 20 to 30 percent less than traditional paper and costs 10 to 20 percent less.  The development of stone paper in paper characteristics, including security, physical and other characteristics, the main characteristics of stone paper is not only waterproof, anti-fog, anti-oil, anti-insect, etc., and in the physical characteristics of tear resistance, folding resistance are superior to wood pulp paper.  

Paper of stone material ingredient "polymer" mostly polymer resin or plastic and its derived from non-renewable petrochemical resources, from this perspective, the stone paper use non-renewable petrochemical resources, reduces the environmental value, but due to the extensive use of calcium carbonate, each with a ton of environmental protection packaging materials, can for the country save 2.3 tonnes of oil resources,  Worth popularizing.  

Stone paper but in its use process itself has the problem of easy embrittlement, whether polymer composition can be completely degradation, when after the stone paper waste composition of calcium carbonate can rapid decomposition, polymer part can exist for a long time, loss of calcium skeleton support so it's easy to weathering brittle, produce similar plastic particles of dust particles,  The hidden harm to the environment may be greater after spreading through the food chain, so it is important to establish stable recycling channels to avoid being recycled with traditional products.  

But if the degradation of the above into consideration or recycled, polymer change into biodegradable PLA \ PBAT polymer is likely to cost advantages and application advantages of less than ideal, and the biodegradable plastic degradation period is longer, compared to the degradation of wood pulp paper both the ability and recovery value impact on the environment after the abandoned and indifference or not comparable.  

If limestone mineral powder filled with stone paper is partially replaced with large length calcium carbonate whiskers, it is expected to further reduce the proportion of polymer used and improve the embrittlement problem in paper use.  In the actual pulp and paper making, the large length whisker products can also reduce the use of natural fiber and play a certain function.