L a n c a S a l e s I n c. 1 2 3 5 C e n t r a l A v e. H i l l s i d e, N J 0 7 2 0 5 U S A
Lanca Sales Inc. 1235 Central Ave. Hillside NJ 07205 USA
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PSM
WHAT IS PSM?
PSM is a polymer that is derived from the natural source of corn starch. Corn starch is a kind of polysaccharide polymer which consists of glucoses. It has two separate forms of linear and branched molecules, named as amylose and amylopectin respectively. During the modification process, corn starch is mixed with cellulose and enzymes in a large stirrer where condensation and polymerization happen to modify the starch properties. Enzyme addition and crosslink technique transforms the molecular structure of starch which has three distinguishable properties:
Change from hydrophile to hydrophobe
Change from heat sensitivity to high temperature resistance
Change from brittleness to plasticity
This modification process of corn starch creates PSM crystals. The crystals will be fed into a twin-screw extruder where starch plasticization happens continuously. The repeated kneading of the plasticized starch increases the rigidity of PSM. Some percentage of water moisture is removed in the extruder. At the end of the extrusion, PSM grains are produced.
Because the majority of PSM are composed of natural ingredients, it will decompose in a condition where warm temperature, high moisture and bacteria are present. Below is a chronological chart of PSM film which disintegrates in a compost environment. PSM film breaks down into smaller pieces and degrades into the compost completely after 6 weeks.
Evolution of the Disintegration of PSM Film (207 µm)
PSM MATERIAL CHARACTERISTICS
Corn starch, a renewable resource, is the major raw material of PSM where the cost is low and the supply is abundant and stable in China.
A genuine environmental-friendly product from manufacturing to post-use disposal. No wastewater, effluent gas or waste residual discharged throughout the manufacturing process.
It can be used for a variety of manufacturing processes such as film blowing, injection, extrusion and foaming to product different products. Traditional plastic manufacturing machine is good enough to product PSM ranges of products.
Excellent product performance properties with water-proof, oil-proof, high melting point and can be used in microwave, which is superior to those similar products in the domestic market.
It can be degraded under compost conditions and be incineration as well. Only non-tonic smoke and residue is left after burning, of which can be used as fertilizer.
A unique and revolutionary ecological material that is fully and completely degraded into harmless substances such as water and carbon dioxide.