The surface of the thermal paper paper is coated with a solid mixture of dye and an appropriate substrate, such as a combination of Freon dyes.First, the substrate is heated to its melting point, and thereafter the dye reacts with an acid (the reactant acid in thermal paper is usually bisphenol A (BPA).) The reaction occurs, causing the dye to develop a color, followed by the rapid solidification of the matrix, thus preserving the altered state. Today's discussion of BPA-free thermal paper refers to thermal paper made with alternative color developers that do not contain BPA chemicals such as bisphenol S (BPS).
BPA is an endocrine disruptor, and even trace amounts may interfere with the body's hormone balance, causing a host of health problems. BPA can be ingested by infants in some plastic toys, cups, and some cashiers, who often hand receipts to customers or in the trash. Because of the high levels of BPA in receipts, cashiers often have the highest levels of BPA in the adult population. While the U.S. Food and Drug Administration (FDA) has stated that the risk of BPA is low under normal conditions of use, the agency recognizes that further research is needed to fully assess the long-term effects of BPA. In the environment, BPA is difficult to degrade and tends to accumulate in bodies of water and soil, causing long-term effects on ecosystems. The emergence of BPA-free thermal paper therefore plays a key role in the daily use of thermal paper for human health and the environment.
Thermal paper is a kind of special paper that is extremely easy to decompose, and the components on its surface will cause certain pollution problems during processing. If it is casually discarded, it will not only waste resources, but also cause impact on the environment. Generally speaking, the discarded thermal paper can be sent directly to the professional waste recycling and treatment station, which will be handed over to the professionals for processing and recycling. And they can also be used again in printing, packaging and other fields after certain processing, so that it can be reused and reduce the waste of resources.
Due to the presence of BPA, this type of paper requires special handling during recycling to prevent the release of BPA into the environment. In addition, BPA may migrate into recycled paper, reducing its quality and increasing its toxicity.
Unlike regular thermal paper, which contains BPA, BPA-free thermal paper is recycled so that the phenol does not enter wastewater or contaminate other paper in the recycling stream, contaminating soil, food and water. But BPA is used in almost 90% of thermal paper, and with more than 12 million trees and 13 billion gallons of water consumed annually to produce this paper, using BPA-free paper is also an important conservation tool for the environment and water resources.
On the question of whether BPA-free thermal paper can be recycled, the answer is yes. Because of its chemical composition compared to BPA, for the environment and the human body have a very large degree of reduction in the degree of harm, I believe that with the popularity of BPA-free thermal paper and alternative, for the thermal paper caused by the health problems and environmental impact will gradually reduce the production of thermal paper benefits and the market will also become increasingly good.
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