HPL was first invented by two young Americans in 1913. During an inspection of laboratory products, they unexpectedly discovered that this material made of kraft paper, phenolic resin, and melamine resin had incredible fire resistance and high temperature resistance. They continued to improve the process and applied for a patent for the resin formula. From then on, hpl was promoted to the market as a substitute for mica sheets and entered thousands of households.

Melamine resin (MF), phenolic resin (PF), and epoxy resin (EP) all belong to the broad category of "thermosetting resins". These resins can soften and flow upon initial heating. When heated to a certain temperature, they undergo a chemical reaction, curing and hardening. This change is irreversible; reheating cannot soften or melt them again. It is precisely this characteristic that allows them, during the first heating while plasticized and flowing, to fill a mold cavity under pressure and subsequently cure into a product with a defined shape and dimensions. Melamine resin (MF) is colorless and transparent, allowing for brightly colored molded products. It possesses excellent heat resistance, high surface hardness, good mechanical properties, good electrical properties, and superior resistance to water, solvents, and chemical agents. Consequently, it is used in tableware, various household goods (including furniture), and industrial products. Phenolic resin (PF) is one of the longest-established types of plastic. During molding, various filler materials are often used; the properties of the final product vary depending on the fillers employed. It is primarily used in applications requiring heat resistance. Epoxy resin (EP) is a thermosetting plastic cured using hardeners (curing agents, such as amine or acid anhydride). It exhibits excellent adhesive properties, outstanding electrical characteristics, and good mechanical properties.