The pen is really familiar to us. In life, we often use a pen to write. It was invented in the early 19th century. The tip is made of metal and is sleek and flexible, and quite smooth. The main principle of the pen is to squeeze out the air in the pen bag. The air pressure in the pen bag is smaller than the air pressure in the pen, and the outside air pressure squeezes the pen water into it.
Because of the market demand, a plastic fountain pen appeared. The plastic fountain pen was produced in Brazil. It was made of degradable resin and polylactic acid polymer material. The material was made from corn, wheat, tapioca starch and potato starch. to make. Has good biocompatibility and biodegradability. The production of biodegradable plastic pens emits less greenhouse gases than conventional plastics. Plastic fountain pen is widely used in life.