彩钢板粉末涂料类面漆介绍

20世纪90年代初，为了保护环境和节约资源，粉末涂料面漆彩钢板人们尝试在卷材生产线上使用无溶剂粉末涂料。1995年，美国第一条采用粉末涂料的彩涂板生产线投入工业运行。由于 粉末涂料面漆彩钢板涂装速度的限制和涂膜太厚，粉末涂料在预涂卷材生产线上并没有得到预期的发展。1999年粉末涂料消费量仅为7万吨，不到粉末涂料总量的1/10。2001年，欧洲只有不到10条预涂卷材生产线使用粉末涂料。彩涂板生产线粉末涂料的发展关键在于涂料配方、涂装设备、固化方式和设备的改进和创新，粉末涂料面漆彩钢板以提高粉末涂装速度，降低涂膜厚度。现在这两个领域都有突破。

目前，生产彩涂板所用的粉末涂料主要有聚酯、聚氨酯和聚丙烯酸酯涂料。环氧树脂粉末涂料由于耐候性差，一般不直接用作预涂卷材的面漆，而常用作聚酯树脂或聚丙烯酸酯树脂粉末涂料的固化剂。

In the early 1990s, for the purpose of environmental protection and resource saving, people tried to use solvent-free powder coating in coil production line. In 1995, the first color coated sheet production line using powder coating was put into industrial operation in the United States. Due to the limitation of coating speed and too thick coating film, the powder coatings did not get the expected development in the production line of precoated coil. In 1999, only 70000 tons of powder coatings were consumed, which was less than 1 / 10 of the total amount of powder coatings. In 2001, less than 10 pre coated coil production lines in Europe used powder coatings. The key to the development of powder coatings for color coated board production line lies in the improvement and innovation of coating formula, coating equipment, curing mode and equipment, so as to improve the speed of powder coating and reduce the film thickness. Now there are breakthroughs in both areas.

At present, the main powder coatings used in the production of color coated boards are polyester, polyurethane and polyacrylate coatings. Due to poor weather resistance, epoxy resin powder coatings are generally not directly used as the topcoat of precoated coil, but are commonly used as the curing agent of polyester resin or polyacrylate resin powder coatings.