Meiji / Beverage with straw Switch to straw containing biomass plastic
If you write the contents roughly
As part of the "Plastic Resource Recycling Initiative" announced in May 2020, we are promoting the use of environmentally friendly plastics such as biomass plastics and recycled plastics, and have been studying straws for beverage products.
From February in the Meiji era, straws containing environmentally friendly biomass plastics have been added to beverage products with straws ... → Continue reading
Wikipedia related words
If there is no explanation, there is no corresponding item on Wikipedia.
However, just because it is derived from biomass does not mean that it is biodegradable, and conversely, just because it is biodegradable does not mean that the raw material is biomass.Therefore, the expression "bioplastic" can be misleading because it is not possible to distinguish between the two properties that do not always coexist.
The following is a description of biomass plastic, which is a plastic made from biomass.
Biomass plastic is a plastic made from biological resources (biomass), which are renewable resources.The synthesis method is roughly classified into two types.The first is,corn,sugar caneOf originStarch,sugarIs used as a raw material, and they are transferred to different substances by fermentation, etc.monomerWas synthesized and then polymerizedpolymerIs.For exampleLactic acidIs a polymer ofPolylactic acid(PLA) and produced by microorganismsPolyhydroxy alkanoateThere is (PHA).The second is from plants, etc.celluloseSuch asPolysaccharideWhile taking advantage of the structure of the polymer skeletonDerivativeBy becomingThermoplastic(GivenCellulose acetateEtc.).
Biomass-based polymers have been widely studied even before fossil resource-derived polymers were synthesized (mainly).NitrocelluloseCellulose derivatives such as).However, from the first half of the 20th century, high-performance polymers derived from fossil resources have been produced inexpensively and in large quantities (Nylon,polypropyleneEtc.), the study went down. From the latter half of the 20th century, due to the growing social awareness of the environment, biomass-based materials have been attracting attention again.
Bioplastics are originally on the groundplantBecause it is made fromcarbon dioxideDoes not affect the increase or decrease ofCarbon neutral(Carbon dioxide emitted into the atmosphere by burning biomass plastic is fixed to plants again by photosynthesis).This property is the reason why biomass plastics are "environmentally friendly".However, there is an opinion that it is not completely carbon-neutral because it requires energy when manufacturing biomass plastic as well as conventional plastic.
When incinerated, the heat of combustion is low andDioxinNo kind occurs.
Most of the biomass plasticsBiodegradable plasticHas the nature of.It is decomposed into water and carbon dioxide by microorganisms, and plants photosynthesize based on the carbon dioxide.StarchProduces and also from starchBiodegradable plasticIt is circulatory because it can produce raw materials for.
On the other hand, bio-PET and bio-PE (materials used for plastic shopping bags, etc.) made from biomass are the same in performance as ordinary PET and PE, and do not have biodegradability.Being derived from biomassBiodegradableIt should be noted that there is not always a match.(Biomass origin ≠ biodegradability)
- Biodegradable plastic
- Polylactic acid
- Genetic engineering