At present, most domestic heat stabilizers are used, so there are hidden dangers in environmental protection. At present, lead heat stabilizers have been banned in the United States, and plans to ban them in Europe. Organotin heat stabilizers have already completely replaced lead heat stabilizers in the United States. In Asia, China and India are still the largest users. Some domestic pipe manufacturers such as PVC water pipes are still using a large amount of lead heat stabilizers due to production costs and technical reasons. With the increasing attention to health problems and the gradual improvement of environmental protection regulations, lead heat stabilizers will be replaced by organic tin heat stabilizers with higher safety and reasonable cost in the production of plastic water pipes. In addition, almost all of the lead heat stabilizers used in the production of plastic doors and windows in our country, although not in direct contact with the human body, still pose a threat to the environment and health. In particular, many plastic door and window products of many manufacturers have already begun to go abroad. Therefore, whether they are domestic consumers or export products, they will put more stringent requirements on the green safety standards of plastic door and window products. However, due to the fact that there are a considerable number of manufacturers that have not yet fully understood this, and due to the weak technical force, it will take time for the plastic door and window industry to completely eliminate lead heat stabilizers.
At present, the development of environmentally friendly products has also become a hot spot abroad. For example, flame retardants, functional additives that impart flame retardancy and smoke suppression to polymer products, are generally divided into brominated flame retardants, chlorine flame retardants, phosphorus flame retardants, and inorganic flame retardants. Big category. Although foreign countries are still dominated by brominated flame retardants with excellent comprehensive performance, with the increasingly strict environmental protection requirements, reducing the toxicity of flame retardants and developing non-toxic flame retardants have become research hotspots. Among them, phosphorus-based flame retardants are developing towards high functionality and high added value. It has dual functions of flame retardant and plasticizing, and produces less toxic and corrosive gases than halogen-based flame retardants. Antimony trioxide flame retardant mainly develops ultrafine particles and colloids to adjust the particle size distribution of aluminum hydroxide and enhance the flame retardant effect. In addition, many foreign companies are seeking various inorganic flame retardant compounding methods. At present, the safety issues related to the production, use and recycling of flame retardants have been generally valued by governments and enterprises of various countries around the world. Today, the world's largest flame retardant manufacturers are committed to taking responsibility for the safety of their products and providing detailed and reliable related information and materials. Once a flame retardant with suspicious hazards to human health and the environment is found, a comprehensive toxicity assessment is carried out, and their production, use and recycling are strictly controlled. When it is confirmed that it is not suitable for use, the production and sales shall be stopped immediately, such as tris (dibromopropyl) phosphate and pentabromodiphenyl ether. In addition, the use of almost all flame retardants is in order. As long as these regulations are followed and effective precautions are taken, the flame retardants will not have a negative effect on the environment.
With the improvement of product quality and performance requirements, the development of highly efficient and multifunctional plastic additives has become the focus of the work of large foreign companies and scientific research institutions. For example, plastic antioxidants. In recent years, the development speed of foreign sulfur antioxidants has been relatively slow. Many companies have shifted their focus to the development of the combined use of main agents and auxiliary agents to achieve high molecular weight products and good thermal stability. No pollution and no discoloration. As another example, metal ion passivators for polymers are developing to multi-functionalization. The plastic packaging industry, especially plastic manufacturers used in food and pharmaceutical packaging, has shown great interest in vitamin E antioxidants. The effective component of vitamin E is α-tocopherol (ATP), which not only has a very high oxidation resistance, but also can eliminate or reduce the odor in plastic packaging materials. Among other types of additives, they are mainly used to reduce the surface resistance of plastic products and eliminate surface static electricity. At present, foreign countries have greatly improved durability, heat resistance, functionality, flame retardancy and transparency. Varieties have formed a series. The amount of foreign impact modifiers in ACR (acrylonitrile-styrene copolymer) and MBS (methyl methacrylate-butadiene-styrene copolymer) with excellent comprehensive properties has rapidly increased. In addition, there are some Functional additives have also begun to form a market scale, such as blowing agents, lubricants, colorants, coupling agents, biological inhibitors, anti-fogging agents, reinforcing agents and fillers, nucleating agents, degrading agents, etc., despite the demand There are still relatively few, but the development prospects cannot be ignored.
The light stabilizers mainly used in the production of long-acting agricultural films can be roughly divided into four categories: ultraviolet absorbers, quenchers, free radical scavengers and light shielding agents according to their mechanism of action. Among them, the hindered amine light stabilizer (HALS) has the advantages of high efficiency, multi-function, non-toxicity, etc., and has become the development direction of light stabilizers in the 21st century. And reactive varieties have become a trend.
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Since the digital printing production process is all computerized digital production, look at the printing and dyeing auxiliary. It also provides unprecedented opportunities for the development of China's textile industry. Learn to print and dye additives. But it is not optimistic that textile additives. Nano light guide plate. Looking at the textile printing and dyeing aid formula. The souvenir department of a famous museum in China relies on the sale of key chains. You know textile printing.
Especially in the printing of high-precision patterns such as color gradation, moire, etc., it refers to a technical method for analyzing unknown items using multi-map confirmation. Want to know textile printing and dyeing. Obtain the required high-precision printing output on various textile fabrics. Textile printing and dyeing auxiliary formula technology.
