Document vBpaoXe2NZq9w5jqBw83Ge8em

Application for exemption from EU REACHPFAS control of polytetrafluoroethylene micropowders Subject: Application for permanent exemption of polytetrafluoroethylene micropowders Basis: First, polytetrafluoroethylene powder has excellent chemical resistance, thermal stability, weather resistance, temperature resistance, non-viscosity, flame retardant and selflubricating characteristics. Second, PTFE powder is widely used in ink, engineering plastics, rubber, paint, paint and other industries. Third, with the further popularization of polytetrafluoroethylene powder application, market demand will increase, polytetrafluoroethylene powder industry will also be further developed, which plays an irreplaceable role in the industry. SubmitterYeqiao Meng Emailmengyeqiao@dongyuechem.com Submission Date: August 22, 2023 Polytetrafluoroethylene powder is a low molecular weight white powder resin processed by a special process. It is a low molecular weight free flowing powder prepared from the dispersion of tetrafluoroethylene by condensation, washing and drying. High molecular weight polytetrafluoroethylene resin sold for product processing, its molecular weight is generally millions to tens of millions, resin powder particle size is usually several hundred microns; The molecular weight of polytetrafluoroethylene powder is generally 30,000-200,000, and the average particle size is less than 30m. Due to its extremely stable molecular structure, polytetrafluoroethylene powder has excellent chemical resistance, thermal stability, weather resistance, temperature resistance, non-viscosity, flame retardant and self-lubricating property. It not only maintains the excellent characteristics of polytetrafluoroethylene, but also has many unique properties, good dispersion, uniform blending, so that the use of the substrate performance is significantly improved, can be used in ink, engineering plastics, rubber, paint, paint and other industries. From different applications, polytetrafluoroethylene powder mainly includes the following aspects: 1, engineering plastics: polytetrafluoroethylene in the field of engineering plastics is mainly used in two aspects: anti-drip agent, wear-resistant lubricant. The chemical composition of wearresistant lubricant and anti-drip agent are polytetrafluoroethylene, the difference is that the molecular weight of wear-resistant lubricant is about 300,000, and the molecular weight of antidrip agent is about 4-5 million. The addition of small molecular weight polytetrafluoroethylene to plastics, rubber, coatings and other fields can significantly reduce the friction coefficient of the material surface, improve the wear resistance of the material itself, and play the role of internal lubrication and demoulding. The large molecular weight of polytetrafluoroethylene is fibrosed under the shearing force of the screw to form a network structure, which plays a role in preventing dripping. Anti-drip agent is mainly used in plastic materials that need flame retardant level to reach V0, which can prevent melting dripping and improve flame retardant performance, and can also meet the requirements of ULV-0 when reducing the amount of flame retardants, while reducing costs and enhancing product competitiveness. Large molecular weight of polytetrafluoroethylene (molecular weight of about 4 million to 5 million) under the shearing force of the screw fibrosis to form a network structure, so as to play a role in preventing dripping. Among them, PC and PC/ABS are used the most. In addition, it is also widely used in PBT, ABS, HIPS and other materials. 2, coating: PTFE micropowder low friction coefficient and low surface tension characteristics, in the coating can play an anti-abrasion, reduce wear, self-lubricating effect. In particular, products that do not increase viscosity can be added in a large proportion in the formula, and eventually the coating can produce anti-pollution, non-stick, water and oil effects. Adding PTFE micropowder to the coating can obtain a variety of high-performance special coatings to meet the needs of industrial development for the coating industry.The addition amount is generally 5~3% is enough, the main role is to improve the viscosity and lubrication of the coating, reduce the friction coefficient and improve wear resistance, improve corrosion resistance and reduce moisture absorption, improve the spray casting performance of the coating, improve the critical film thickness and improve its thermoforming performance. 3, lubricants and greases: Adding PTFE micro powder to lubricating oil and grease can improve the high pressure and high temperature lubrication performance of the material. Even if the base oil is lost, PTFE micropowder can still play the role of dry lubricant. Adding PTFE micropowder to silicone oil, mineral oil or paraffin oil can significantly improve the viscosity of the oil, the amount of PTFE micropowder added depends on the viscosity of the base oil and the consistency and application field of the required lubricant, usually the amount of addition is 5% to 30% (mass fraction). PTFE micropowder added grease, rosin, mineral oil, can get high quality lubricant, currently widely used in ball bearings, wear-resistant bearings, lubricating guide rails, sliding rods, open gear, chemical equipment valves, precision machining surface sealing paste. In addition, PTFE micropowder can also be used as a dry lubricant like graphite and molybdenum disulfide, with excellent results, and mixed with propane and butane can be used as non-stick and anti-wear spray agent, rocket additives, etc. PTFE micropowders can also be used as an effective grease thickener in lubricants. 4, ink: PTFE micro powder to improve the friction resistance of ink; Smoother surface; Improve smoothness; Reduce the mechanical blockage in the printing process; Add directly in the ink production process; It is recommended to add 0.1%~3%. In offset ink, European ink, plastic ink, metal ink, PCM ink, etc., by adding PTFE micro powder, the wear resistance can be improved. At the same time, it also has the effect of anti-bruising and anti-color transfer. In the concave and convex printing surface, especially the use of higher requirements for wear resistance, the use of sintering type is better. In 2020, the global sales volume of polytetrafluoroethylene powder was 14,132 tons. Among them, Three Leaf Technology occupies 15.7% of the market share and is considered to be the global market leader. In 2020, the global PTFE micropowder market size reached $171 million and is expected to reach $280 million in 2027, with a compound annual growth rate (CAGR) of 3.34%. With the adjustment of economic structure and industrial upgrading, the demand for polytetrafluoroethylene powder in related industries is increasing.