Using waste newspapers and flour as raw materials, Germany developed foam packaging materials

The PSP company in Bremen, Germany, has developed a foam paper production process. The replacement of foam with packaging materials made from foam paper can effectively reduce environmental pollution. 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 pieces, then grind them into fibrous pulp and mix them with flour in a ratio of 2:1. The mixed pulp materials are injected into the extruder and pressed into cylindrical particles. 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. Bubble foam does not require chemical additives, only water vapor. Foam paper is produced and used with environmentally friendly properties. It can be handled like a general waste. Used foam paper can also be recycled and reprocessed. From the perspective of economic benefits, producing the same amount of packaging materials, foam paper is 10% cheaper than foam. Foam paper has great application prospects. It can be used not only as a packaging material but also as an insulating material and building material. (Zhou Xuecheng)