静电粉末喷涂的工艺流程：
用静电粉末喷涂设备（静电喷塑机）把粉末涂料喷涂到工件的表面，在静电作用下，粉末会均匀的吸附于工件表面，形成粉状的涂层；粉状涂层经过高温烘烤流平固化，变成效果各异（粉末涂料的不同种类效果）的涂层 。
静电粉末喷涂知识
静电粉末喷涂俗称“静电喷塑”。
静电粉末喷涂是以具有雾化咀（使涂料雾化）和放电极（发生电量电流）的涂装机使涂料微粒化，对之施加电荷，在电极与被涂物体之间形成电场，利用其静电吸附作用而涂装.
主要特点：喷涂方式可采用手动、自动或手动+自动。喷料100%是固体粉末，游离的粉末可以回收利用，涂料回收利用率可达98%。根据工件形式确定输送系统，自动化程度高。涂层微孔少，防腐性能好，并可一次进行厚膜喷涂。
静电粉末喷涂工艺出现于20世纪60年代，主要是应用于金属表面涂装。进入20世纪90年代末，随着粉末涂料和喷涂设备的发展，使静电粉末喷涂工艺应用于非金属表面成为可能。
静电粉末喷涂的特点
自从粉末涂料喷涂技术进入涂装业后， 粉末涂料在一般工业用涂料中所占有的市场比例逐年持续增长，其原因是粉末喷涂技术具有独特的优势。
1.降低对环境的污染程度
随着环保法对在大气中有机挥发物(voc)含量越来越严格的规定，涂装业一直试图开发对环境较温和的涂装技术，经过长期的研究与实验后，发现“静电粉末喷涂” 是目前能够达到的最干净的涂装技术。
粉末涂料不使用有机溶剂、水等挥发性溶剂，为无机溶剂型涂料， 这就大大减少了起因于溶剂的污染公害，包括因含有机溶剂而引起操作人员的中毒事件；也不会因有机溶剂而引发火灾。
自粉末涂料面世至今，还没有发生过因粉末涂料而引起的重大安全事故。
粉末涂料是纯固体成分的涂料， 可以完全采用全自动喷涂，大量或超喷的粉末，容易由回收系统收集，达到回收再利用的目的。因此，粉末涂料的使用率几乎可达100％ ，使得涂装业降低废弃物的处理成本， 同时可使环境污染的程度降到最低。
2.经济效益显著
涂膜形成的成分中，溶剂型约为60％-65％ ，而粉末涂料几乎可达到100％ 的效率，且未附着于被喷涂物件的粉末，可以回收再利用。一般情况下，使用粉末喷涂技术，可使涂装作业尽可能达到经济性及有效性。在粉末涂装作业中，如果有喷涂不良的部位，可在未经烘烤前，使用空气喷枪将其吹除，然后进行再涂装。因此可避免表面流漆、滴漆等现象，大大降低了重涂返工的几率。由于粉末喷涂运用静电喷涂作业，涂装设备几乎可达到全自动化，节约了人力资源。即使需要人工辅助，涂装人员也不必经过长期训练， 即可掌握操作技能。粉末涂料为100％ 的固体成分，不需添加任何溶剂，所以涂料量减少，节省包装，降低储存空间。
3.节约能源
粉末涂料因没有有机挥发物的产生，避免了因挥发至大气中而产生的浪费，所以与液体涂料相比，能源成本大大降低。静电喷涂设备一次喷涂即可得厚膜，不必进行重复性喷涂，也不必打底漆， 比相同膜厚的涂装作业速度快，效率高。涂装设备中不需要静止时间，可节省设备空间。另外，粉末喷涂的烘烤时间也较液体涂装时间短，因此可大大降低燃料能源的消耗，缩短涂装作业线，提高产量及生产效率。
4.优异的涂膜性能
只要将粉末涂料直接喷涂于经过预前处理的MDF板材的表面上，经过烘烤，即可得到性能优异的涂膜表面。一般粉末涂料具有涂膜持久的性能，其中包括耐磨擦性、抗冲击性、密着性、韧性、耐蚀性及耐化学药品性能等。而户外使用的粉末涂料，除了上述的优点外，还包括高耐候性及耐污染性。粉末涂料一次喷涂即可得到高厚涂膜，膜厚可在50-300 m 之间，且没有溶剂涂料厚涂时的滴垂或积滞现象发生。
The process flow of electrostatic powder spraying:
Spray powder coating onto the surface of the workpiece using electrostatic powder spraying equipment (electrostatic spray molding machine). Under the action of static electricity, the powder will evenly adsorb on the surface of the workpiece, forming a powdery coating; The powdery coating undergoes high-temperature baking, leveling, and solidification to form coatings with varying effects (different types of powder coatings).
Knowledge of electrostatic powder spraying
Electrostatic powder spraying is commonly known as "electrostatic spray molding".
Electrostatic powder spraying is a coating machine with atomizing nozzles (to atomize the coating) and discharge electrodes (to generate electrical current) to micronize the coating, apply an electric charge to it, and form an electric field between the electrode and the coated object, using its electrostatic adsorption effect to apply the coating
Main features: The spraying method can be manual, automatic, or manual+automatic. The spraying material is 100% solid powder, and free powder can be recycled, with a coating recycling rate of up to 98%. Determine the conveying system based on the form of the workpiece, with a high degree of automation. The coating has few micropores, good anti-corrosion performance, and can be sprayed with thick film in one go.
The electrostatic powder spraying process emerged in the 1960s and was mainly applied to metal surface coating. In the late 1990s, with the development of powder coatings and spraying equipment, it became possible to apply electrostatic powder spraying technology to non-metallic surfaces.
Characteristics of Electrostatic Powder Spraying
Since the introduction of powder coating spraying technology into the coating industry, the market share of powder coatings in general industrial coatings has been continuously increasing year by year, due to the unique advantages of powder spraying technology.
1. Reduce the level of environmental pollution
With the increasingly strict regulations of environmental protection laws on the content of organic volatile compounds (VOCs) in the atmosphere, the coating industry has been trying to develop environmentally friendly coating technologies. After long-term research and experiments, it has been found that "electrostatic powder spraying" is currently the cleanest coating technology that can be achieved.
Powder coatings do not use volatile solvents such as organic solvents or water, and are inorganic solvent based coatings, which greatly reduces the pollution caused by solvents, including poisoning incidents caused by the presence of organic solvents among operators; It will not cause a fire due to organic solvents.
Since the introduction of powder coatings, there have been no major safety accidents caused by powder coatings.
Powder coating is a pure solid component coating that can be fully automatically sprayed. Large amounts or overspray of powder are easily collected by the recycling system, achieving the goal of recycling and reuse. Therefore, the utilization rate of powder coatings can reach almost 100%, reducing the cost of waste treatment in the coating industry and minimizing the degree of environmental pollution.
2. Significant economic benefits
Among the components formed by the coating film, the solvent type is about 60% -65%, while the powder coating can achieve almost 100% efficiency, and the powder that is not attached to the sprayed object can be recycled and reused. In general, the use of powder spraying technology can maximize the economy and effectiveness of painting operations. In powder coating operations, if there are areas with poor spraying, they can be blown off with an air gun before baking, and then repainted. Therefore, it can avoid surface paint flow and dripping, greatly reducing the probability of repainting and rework. Due to the use of electrostatic spraying in powder spraying, the coating equipment can almost achieve full automation, saving human resources. Even if manual assistance is required, coating personnel do not need to undergo long-term training to master operational skills. Powder coatings are 100% solid components and do not require the addition of any solvents, resulting in reduced coating volume, reduced packaging, and reduced storage space.
3. Energy conservation
Powder coatings, due to the absence of organic volatiles, avoid waste caused by volatilization into the atmosphere, thus greatly reducing energy costs compared to liquid coatings. Electrostatic spraying equipment can obtain a thick film by spraying it in one go, without the need for repetitive spraying or primer, which is faster and more efficient than painting with the same film thickness. There is no need for static time in the painting equipment, which can save equipment space. In addition, the baking time of powder spraying is also shorter than that of liquid coating, which can greatly reduce fuel and energy consumption, shorten the coating operation line, and improve yield and production efficiency.
4. Excellent film performance
As long as the powder coating is directly sprayed on the surface of the MDF board that has undergone pre-treatment and baked, an excellent coating surface can be obtained. General powder coatings have long-lasting film properties, including wear resistance, impact resistance, adhesion, toughness, corrosion resistance, and chemical resistance. In addition to the above advantages, powder coatings used outdoors also have high weather resistance and pollution resistance. A high thickness coating film can be obtained by spraying powder coating in one go, with a film thickness ranging from 50 to 300 meters, and there is no dripping or accumulation phenomenon during solvent coating.
