What does PSM mean when we say it’s PSM cutlery?

By mixing around 50%~60% of the plant materials such as corns, potatoes and other vegetables, plus 40%~45% around plastic fillers such as PP (polypropylene), PSM comes into being with capability of withstanding high temperatures up to 90℃ or 194° F;
PSM is a biodegradable, thermoplastic resin that can be processed by film blowing, injection molding, thermoforming, and foaming.

What Is Cornstarch?
Cornstarch, the starch derived from corn, is made from the white endosperms found in the center of a corn kernel. These endosperms are ground into a fine, white powder that is commonly used as a thickening agent.

PSM (Plant starch Material) Characteristics:
● Biodegradable, but not compostable
● Made with 50%~60% starch,40~45% PP
plus some other additives
● Heat resistance up to 90°C / 194℉
● Environment Friendly
● Made from Renewable Resources


PSM can be used for a variety of manufacturing processes as below:
Film Blowing: film, packaging bag, disposable bag, garbage bag, shopping bag and other membrane products etc.
Injection Molding: cutlery, golf pegs, stationery, toys, craftwork etc.
Thermoforming: PSM plate and sheet for plates, dishes, boxes, bowls, flower pot etc.
Foaming: shockproof package materials.
Traditional plastic manufacturing machines are good enough to produce PSM ranges of products.

What’re differences among PLA, CPLA and PSM?
Here’s a table with general properties and data for comparison.
Plastarch Material (PSM) is a biodegradable, thermoplastic resin. It is composed of starch combined with several other biodegradable materials.
PSM Cutlery is made with a blend of renewable resources and conventional plastic.
PSM cutlery is not compostable.

Application of PSM
Internal and external packaging products include: food packaging, electronic product packaging, flower pots and bottom dishes, seedling flower pots, medical packaging, hotel supplies, shock-proof packaging (pearl board), etc.
Film and film products include: industrial and agricultural films, biodegradable film bags, starch-based shopping bags, shrink films, heavy packaging bags, vest bags, and biodegradable plastic bags.
Other products: garbage bags, starch-based water cups, starch-based dinner bowls, knives, forks, spoons, tableware, cups and plates, lunch boxes, non-toxic toys, etc.
When PSM is used in biodegradable plastics, its compostability has been tested by the international authoritative testing agency OWS in Belgium to EN13432 and ASTM D6400 standards, and certified by independent third-party certification agencies DIN CERTCO and VINCOTTE, and obtained the "Compostable" logo and "OK Compost" logo.

Post time: Feb-12-2022