An Introduction of Stone Paper
The main raw material of “stone paper” is a film-forming plastic (a large amount of limestone powder is the same as the filler used in traditional papers, but is a filler that can improve its opacity and reduce the amount of plastic). The active ingredient of plastics is generally the latex of petroleum cracking product polymers such as styrene, butadiene, and acrylic acid. The raw material oil is the world's limited and non-renewable mineral resources, and the chemical process from the manufacture of such plastics from petroleum is solved. Whether the environmental protection issue has achieved better environmental effects than the modern pulping process has not been mentioned at all. These are all aside, but from the standpoint of sustainable development, “stone paper” cannot replace traditional paper.
The more noteworthy issue of "stone paper" is its waste recycling and recycling. As we all know, because plastic film packaging bags are difficult to collect, they are extremely difficult to degrade under natural conditions, so they have caused widespread public concern and have adopted environmental protection measures that restrict their use. The highly-filled plastic film (stone paper) is more difficult to recycle than ordinary plastic films, and the value of recyclables is lower. The combustion process also releases toxic gases that affect the air quality. Currently, if such discarded “stone paper” is mixed into the waste paper of traditional paper, the waste paper processing system of the existing paper mill will dispose of it as a mixture like a disintegrable plastic film. This is for paper mills. This not only causes economic losses, but also increases the difficulty in dealing with such waste.
In general, the world paper industry has continuously made innovations in the production process technology and equipment for pulp and papermaking, but in terms of fiber raw materials, due to the large amount of plants, wide scope and reproducibility, and the plant fibers can be used under suitable conditions. Combining hydrogen bonds with each other to create the unique properties of the necessary strength of paper, attempts to substantially alter the basic raw material of traditional paper, plant fiber pulp, are probably both unnecessary and difficult to realize. Is it possible to believe that this kind of change can be realized by replacing the plastic film with high filler content with a beautiful name of “inorganic environmental stone paper”? As mentioned before, a small amount of specialty paper with some special fibers to express its special functions is quite exceptional, but it cannot be confused with mass production of ordinary traditional paper. Some people also know that there are many problems in the development of "stone paper". They put forward that "stone paper" aims at starting with specialty paper. In fact, calling special paper means that there is only a small proportion in paper and it seems that plastic is used. The specialty paper made of thin film will generally have two situations. One is that the plant fiber paper has a porous network structure and generally has better fluid absorption and permeability, such as cigarette paper, filter paper, and household paper. Or require high air permeability, or require good fluid permeability, or require good absorption, these are difficult to replace the plastic film to adapt; the other is: plastic film can improve, replace the specialty paper such as cable insulation Paper, capacitor paper, etc., will all use the name of the plastic film directly, without having to assume the name of special paper.
From the Internet's entry on "stone paper," we also saw that "stone paper" was not only inappropriately touted, but has also begun to raise capital to build larger "stone paper" manufacturing enterprises (individual areas have also to the cadres, A report on the apportionment of funds raised by the people.). The author believes that the paper industry needs to remind these active people who care about the paper industry and are willing to join or invest in papermaking. The “stone paper” companies they invest in are not really paper companies, but plastic film manufacturing. If you want to invest in construction projects such as "stone paper" production, you should first be able to carefully understand the history and trends of paper industry development, and the actual situation of "stone paper" based on plastics in resources, environmental protection, etc. , problems and prospects, we must make more consultations on the construction of such projects and try to avoid unnecessary losses. We also hope that propaganda advocates of "stone paper" will study more about the development of the world paper industry and try not to deceive themselves as much as possible.
