Biodegradable PLA Plastic Sheet for Disposable Products
Product Details
Biodegradable PLA Plastic Sheet for Disposable Products
Polylactide (PLA) is a biodegradable thermoplastic derived from renewable resources such as corn starch, tapioca or sugar cane. The fermentation of starch (dextrose) yields two optically active enantiomers, namely D (-) and L (+) lactic acid. Polymerization is carried out by either direct condensation of the lactic acid monomers or by ring-opening polymerization of the cyclic diesters (lactides). The resulting resins can be easily converted into films and sheets via standard forming methods including injection and blow molding.
The properties of PLA like melting point, mechanical strength, and crystallinity depend on the proportions of the D(+) and L(-) stereoisomers in the polymer and on the molecular weight. As for other plastics, the properties of PLA films will also depend on compounding and on the manufacturing process.
Typical commercial grades are amorphous or semi-crystalline and have very good clarity and gloss and little to no odor. Films made of PLA have very high moisture vapor transmission, and very low oxygen and CO2 transmission rates. PLA films also have good chemical resistance to hydrocarbons, vegetable oils, and the like.
The mechanical properties of PLA are very similar to PET. However, typical PLA grades have a lower maximum continuous service temperature and are more brittle. Often plasticizers are added which (greatly) improve its flexibility, tear resistance and impact strength (pure PLA is rather brittle). Some novel grades also have much improved heat stability and can withstand temperatures up to 120°C (HDT, 0.45MPa). The heat performance of general purpose PLA is typically between LDPE and HDPE and its impact strength is comparable to HIPS and PP whereas impact modified grades have much higher impact strength comparable to ABS.
Most commercial PLA films are 100% biodegradable and compostable. However, the biodegradation time can vary greatly depending on composition, crystallinity and environmental conditions.
Technical Data Sheet
|
Propety |
Typical Value |
Test Method |
|
Melting point |
145-155℃ |
ISO 1218 |
|
GTT(glass-transition temperature) |
35-45℃ |
ISO 1218 |
|
Distortion Temperature |
30-45℃ |
ISO 75 |
|
MFR(melt flow rate) |
140℃ 10-30g/10min |
ISO 1133 |
|
Crystallization Temperature |
80-120℃ |
ISO 11357-3 |
|
Tensile Strength |
20-35Mpa |
ISO 527-2 |
|
Shock Strength |
5-15kjm-2 |
ISO 180 |
|
Weight-average Molecular Weight |
100000-150000 |
GPC |
|
Density |
1.25g/cm3 |
ISO 1183 |
|
Decomposition Temperature |
240℃ |
TGA |
|
Solubleness |
Insoluble in water, soluble in hot lye |
|
|
Moisture Content |
≤0.5% |
ISO 585 |
|
Degradation Property |
95D decompositionrate is 70.2% |
GB/T 19277-2003 |
Application For Biodegradable PLA Film
PLA is mainly used in the packaging industry for cups, bowls, bottles and straws. Other applications include disposable bags and trash liners as well as compostable agriculture films.
PLA is also an excellent choice for biomedical and pharmaceutical applications such as drug delivery systems and sutures because PLA is biodegradable, hydrolysable and generally recognized as safe.
Related Products
Packaging
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Our package is careful enough to avoid the damage of both end of the films.
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Our package is strong enough to withstand bumping and rough handling during the long-distance transportation over the sea.
- We have stick stamp about product details on each pallet.
Our Company
- We are a specialized manufacturer of PLA Sheet/Film.
- we are manufacturing and converting different films such as PVC&PET Shrink Film, PE protective film ,PETG sheet ,PET sheet.
- Our vision today is to maintain our position as one of the leading manufacturers.
Factory Overview
Our Customers&Exhibitions
Why Choose Us?
Clients Feedbacks
1.We will treat each client warmly and paiently and help them find the product they need.
2.We have professional knowledge for our related products.
3.We have good quality both for sample and bulk production.
4.We will always stand at clients' side to arrange shipment.
5.We make clearance documents accordingly to clients' requirement.
Certifications
FAQ
1.Why PLA is also called "Corn plastic"?
As PLA is derived from natural, renewable starch rich crop such as corn, potato.
2.How does PLA decompose?
Under compost condition PLA will decompose into lactic acid when polymers are broken down. Lactic acid will decompose into water and carbon dioxide by bacteria.
3.How long dose it take for PLA to decompose?
It will take 90-180days under compost condition according to different size and thickness of the products.
4.What is compost condition?
Compost condition refers to the co-existence of three key elements:
1). High temperature(58-70ºC)
2). High humidity.
3). Bacteria must co-exist
5.Will PLA products start decompose under normal temperature?
No, it will not. Same as the petroleum-based plastic products, PLA products can be used under normal condition. However, as PLA is not heat-resistant. It is recommended to be used under the temperature of 50ºC.
6.Any special precaution for PLA storage and delivery?
1).Storage: Dry, ventilated and cool environment with optimal temperature under 40ºC.
2). Delivery. Prevent from direct sunshine and pressing, use strong carton box, control temperature during container load by applying insulated materials.
7.Can our existing machine and molds for petroleum-based plastic products produce PLA products?
Yes. Machine and molds for petroleum-based plastic products can produce PLA products by adjusting the mold temperature and relevant production techniques as per the characteristics of PLA.
8.Which areas shall we pay attention during the production of PLA products?
1). Temperature
2). Pressure
3). Moisture content of the material
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