rigorous (Adjective). Manifesting, exercising, or favoring rigour; allowing no abatement or mitigation; scrupulously accurate; exact; strict; severe; relentless; as, a rigorous officer of justice; a rigorous execution of law; a rigorous definition or demonstration. rigorous (Adjective). Severe; intense; inclement; as, a rigorous winter.
Polylactic acid or polylactide (PLA, Poly) is a biodegradable thermoplastic aliphatic polyester derived from renewable resources, such as corn starch (in the United States and Canada), tapioca roots, chips or starch (mostly in Asia), or sugarcane (in the rest of the world).eing able to degrade into innocuous lactic acid, PLA is used as medical implants in the form of anchors, screws, plates, pins, rods, and as a mesh. Depending on the exact type used, it breaks down inside the body within 6 months to 2 years.
Eco-Products offers cups, lids, cutlery, straws and containers made from a biopolymer called PLA (polylactic acid). PLA is made from starchy plants like corn, grown right here in the U.S. Starch from corn kernels is processed into a biopolymer that looks, acts, and performs like petroleum-based plastics.ur PLA products give you the option of products made from renewable resources, like corn instead of oil. Corn can be grown again and again, unlike oil which is nonrenewable. PLA plastics have the added benefit of being compostable when you are finished using them.