The stone is afraid of disease in the process of using it. Once the disease occurs, the stone becomes completely unrecognizable.
In order to prevent the occurrence of disease during the use of the stone and to ensure that the stone remains young and beautiful, the stone manufacturer will buy it and apply it to the stone as soon as it hears that a certain stone protective material has a good protection effect and can ensure that the stone does not develop disease. For example, the adhesive is one of them, and it is hoped that the disease of the stone can be prevented after applying it, and the disease will no longer occur. However, things are counterproductive. Some stones that have been glued will still have disease during use. Stone manufacturers who do not understand the cause of the stone disease are attributed to the poor quality of the glue, and blame the glue manufacturer for the poor product quality. Well, there are problems with the product, making the adhesive production enterprises busy, investigating the causes of stone lesions, writing analysis reports, and explaining the reasons for the lesions to enterprises using adhesives. As everyone knows, there are many reasons for the pathological changes of stone, but one or two reasons can be explained and analyzed clearly. Stones that are not glued may or may not be pathological (in fact, the stone that is installed before the glue has not appeared) Up to now, there have not been too many lesions); the stone that has been glued can guarantee that it will not be affected, but the actual situation is that the stone that has been glued does have disease. What is the problem? This makes the adhesive manufacturer feel puzzled and do not understand?
Regarding whether the adhesive can effectively prevent stone lesions, we still treat this issue objectively and rationally. As a new type of protective material to prevent stone lesions, adhesives do have a certain effect on preventing stone lesions. Note that it is not 100%. As a result, any stone adhesive manufacturer dare not pack a ticket and say that its adhesive can prevent stone lesions 100%. I have seen the test reports of several waterproof adhesives. The report stated that 500mm water column is 24h (note that this is 500mm water column [0.05 atmosphere], 24 hours, not 10m water column [1 atmosphere], not 48 hours, 72 hours). If the glue does not leak, does it mean that the glue has achieved zero water permeability? Does it mean that if the glued stone is exposed to water or moisture for a long time, the water will not slowly penetrate from the bottom of the stone to the surface of the stone Does it mean that the adhesive can resist all water erosion? Even if the back glue achieves zero water penetration, I think the thickness of the back glue made of the stone back is only 1~2mm. The thickness is not enough to resist the seemingly weak, but it has the long-term effect of the powerful water that "drops through the stone". It is impossible for stone materials to be used without contact with water for a long time, such as the stone in the bathroom and the stone in the kitchen. What's more, the physical and chemical properties of stone are ever-changing, and the use environment is also changeable. The degree of user care for the stone is also different. There are various reasons for the disease of the stone. The same comprehensive "differentiation and treatment" has developed a special adhesive suitable for each type of stone to treat the disease of a certain stone. This is just like human beings, why cancer has always been terminally ill, because the real cause of cancer has not been found, coupled with the changeable nature of people's bodies, which increase the difficulty of conquering cancer. The same applies to stone adhesives. There is no “magic bullet” for curing human diseases, and there is no “magic bullet” for curing stone lesions. In the treatment of stone adhesives, one should adopt a correct and scientific attitude, and even if the adhesives have been used, the disease will still occur. The reason for this is due to the changeable stone, and the lack of careful care and protection of stone in various processes is the right reason!
How much effect the back glue can play on the prevention of stone lesions depends not only on the back glue, but also on other factors. Other factors also have an effect and influence on the occurrence of stone lesions. This is a comprehensive system engineering problem. In the past few years, I have experienced some engineering cases where the best adhesive backed stone in China is still yellowing. If the back glue can completely prevent the pathological changes of the stone, the stone that has been back glued should not have the problem of yellowing of the stone. Why doesn't the adhesive do its best to prevent the stone from pathological changes? Talking about my humble opinion, my humble opinion only represents the words of the family, and the views may not be completely correct and are only for reference.
 
1. The power of water seems to be weak, but it is actually very strong
 
Everyone should understand the principle of "water droplets through rocks". The seemingly weak water actually grows with time, its strength is very strong, and a drop of water can form a turbulent river with the accumulation of time; as time increases, the erosion of the dyke can be thousands of miles long. Dike; the role of rock, over time can form strange caves. For the same reason, if the hard and dense stone is exposed to water for a long time, it will be destroyed by seemingly weak water droplets, completely unrecognizable, let alone a thin layer of waterproof adhesive?
2. Can the adhesive with too thin thickness resist the long-term action of water?
 
I have seen that the thickness of the back glue of many back glued stones is only more than 2mm, or even less than 2mm. Is such a thin thickness that it can really resist the long-term effects of water and will not lose its waterproof effect? Although the test in the laboratory does not leak for 24 hours under the action of a 500mm water column, can it show that the water does not penetrate for a long time? My answer is no. The laboratory conditions are definitely not as harsh as the actual environment, and the testing time is 24 hours. What about after 24 hours? What about after 48 hours? What about in a week? What about one month later? What about a year from now? The answer is unknown? The use of stone is a long process, especially if it is installed in an environment where the bathroom has been exposed to water for a long time, not many people will clean it up in time after the bathroom stone is exposed to water to keep the stone surface dry. At the bottom of the stone (so the jointing after the stone is installed is very important, good quality of the joint can prevent water from entering the bottom of the stone from the gap.), it will have a destructive effect on the backing surface, and the performance of the backing will be greatly reduced. No matter how good the adhesive is, it is difficult to withstand the long-term corrosive effect of water, not to mention that the current water contains various chemical substances, and its destructive effect is even greater.
3. The disease of stone has been latent for a long time, can adhesives cure the root cause?
 
The pathological factors of stone are not produced in one day or within a few days. From mining to storage, from production and processing to product delivery, there are countless processing procedures, during which contact with water, adhesives, and other materials that may cause stone disease to occur. Especially in the process of sawing large slabs of blocks, the time of contact with water is the longest. When the diseased substances that may occur on the stone are not completely removed, and the fact is impossible to completely remove, is there a preventive and radical cure for the stone to be glued and used as a surface protection? It's like a person who is already "deadly ill" has entered an incurable state. Is it still useful for you to prescribe preventive medicine to the patient? Obviously, the meaning and effect are not too great. The glued stone still has disease. It is not that the quality of the glue is not good and the glue does not work, but some factors of the stone disease already exist. The glue is powerless and cannot prevent the occurrence of stone disease. In order to prevent and reduce the occurrence of disease, the prevention and control of stone products must be effective in all aspects of the production of stone products.
 
 
4. Who supervises the operation process of the adhesive and who guarantees the quality of the adhesive application?
 
The preparation and use of back glue has its specific requirements: it is not suitable to make back glue in rainy days for a long time; the stone surface is too smooth to be used as back glue; the back glue surface is not clean and not dry. Make back glue on the surface; when preparing the back glue, the ratio of glue to powder should be 1:3, and the mixture should be evenly mixed. Companies that require a lot of this cannot strictly implement it, and the preparations are not weighed in proportion. Either there is too much powder or too much glue. Since the manufacturer of the adhesive has set the ratio of glue liquid to powder, if it is not prepared according to this requirement, it will affect the performance of the adhesive to some extent, and it is not prepared at will. There is a lack of supervision during the preparation and application of the adhesive. If the requirements for the use of the adhesive are not strictly followed, how can the quality of the adhesive products be guaranteed? What is the best performance of the adhesive during use?