Some knowledge about PBT keycaps

     PBT scientific name polybutanediol terephthalate fat, is a milky white translucent to opaque crystalline thermoplastic polyester resin. As one of the toughest engineering thermoplastic materials, PBT is made of 1.4-pbt butanediol and terephthalic acid or phthalic acid resin condensation and mixing, the molecular structure is strong.

    It has very good chemical stability and mechanical strength with high melting point, high hardness, durable wear, permeability and other characteristics