Recently, PSP company of Bremen, Germany, has developed a new process for the production of foam paper, and replacing the foam with packaging materials made from foam paper can effectively reduce environmental pollution and waste of resources.
PSP's foam paper uses old newspaper scraps and flour as raw materials. Its production process is to first cut the recycled old newspapers and newspapers into shreds, then grind them into fibrous pulp and mix them with flour in a ratio of 2:1. The mixed pulp was injected into the extruder and pressed into cylindrical pellets. During the extrusion process, the raw material is foamed by the action of water vapor to form a foam paper. Using foam paper pellets as raw materials, different shapes of packaging materials can be produced as required.
Compared with foam plastics, foam paper has a relatively simple production process and can be molded at one time, eliminating the need for multiple foaming and cooling processes. Since foamed paper does not require chemical additives for foaming, only water vapor is required, and used foam paper can also be recycled and used again. Therefore, foam paper production and use are environmentally friendly. From the economic point of view, producing the same amount of packaging materials, foam paper is about 10% cheaper than foam.