How can bio-based corn starch granules be further processed after gelatinization to make them suitable for extrusion molding?

As the concept of environmental protection becomes more and more popular, bio-based materials have become the new favorite of the manufacturing industry with their unique degradability and environmental protection. Among them, how to further process the bio-based corn starch granules used for extrusion tableware after gelatinization to make them suitable for extrusion molding has become the focus of the industry.

Bio-based corn starch granules, as a biodegradable material made of corn starch, have broad application prospects. However, in order to successfully transform these granules into tableware of various shapes, the post-gelatinization processing steps are crucial.

Gelatinization is a physical change that occurs when corn starch granules are mixed with water under heating conditions. During this process, starch granules absorb water and swell, eventually becoming a viscous liquid. This step not only changes the physical state of starch, but also lays a solid foundation for subsequent extrusion molding.

The gelatinized corn starch liquid needs to go through a series of fine treatments to meet the requirements of extrusion molding. First, the gelatinized liquid needs to be filtered and impurities removed to ensure its purity and uniformity. This step can be achieved through professional filtering equipment and fine operation to provide high-quality raw materials for the subsequent molding process.

Next, the gelatinized liquid needs to be tempered. This includes adjusting the viscosity, temperature, concentration and other parameters of the liquid to meet different extrusion molding requirements. For example, when producing thinner tableware, the viscosity of the gelatinized liquid needs to be reduced; while when producing thicker tableware, the concentration of the gelatinized liquid needs to be increased.

After the conditioning treatment is completed, the gelatinized liquid can enter the extrusion molding stage. Extrusion molding is a technology that extrudes raw materials into a specific shape through a mold. During the extrusion process, the gelatinized liquid gradually turns into tableware of various shapes under the guidance of the mold. This step requires high-precision equipment and skilled operators to ensure the quality and shape of the product.

After extrusion molding, the tableware also needs to be dried, polished and other subsequent treatments. These steps can further improve the quality and appearance of the tableware and make it more in line with market demand.

In general, the processing process of bio-based corn starch granules after gelatinization is a complex and delicate process. Only through scientific methods and high-precision equipment can these environmentally friendly materials be transformed into high-quality tableware products. In the future, with the continuous advancement of technology and the continuous expansion of the market, bio-based corn starch granules will play a more important role in the field of tableware manufacturing.