Most of the Fiberglass sculptures we see are usually placed outdoors. After long-term exposure to sunlight and wind and rain, Fiberglass sculptures are easy to crack and discolor, and most Fiberglass sculptures use polyester resin. Our sculpture materials are 123 epoxy resin, why the raw material is so important, please read on.
The weathering performance of Fiberglass sculptures made with different raw materials and molding processes is different. Polyester resin has low strength and is easy to hydrolyze, so the weather resistance of polyester fiberglass is relatively poor.
Epoxy resin has many reactive functional groups, and there is a large benzene nucleus on the main chain. Due to the large π bond on the benzene nucleus, energy is easily dispersed, and it is not easy to cause the destruction of weak bonds. At the same time, the adhesion to the fiber surface is also Good, so epoxy Fiberglass has better weather resistance than polyester Fiberglass.
Although the phenolic resin has low bonding strength, it is hot-pressed. Compared with polyester and epoxy glass fiber reinforced plastics with hand lay-up, it has fewer defects such as internal micropores and cracks. It has good compactness and is not easily affected by natural factors. Invasion improves weather resistance.
Some people have done experiments to change the flexural strength of four kinds of glass fiber reinforced plastics in Shanghai and Guangzhou after three years of atmospheric exposure. It is concluded that the weather resistance of phenolic and epoxy glass fiber reinforced plastics is better, and the bending strength is not obvious after three years of exposure. Variety. The weather resistance of polyester fiberglass is poor.