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Degradable plastics


    Biodegradable Starch Resin

    Product Type

    Film Blowing Grade Starch Based Biodegradable Master Batch

    Product Features

    Granules are in light yellow and come in cylinder and round shape, with slight fragrance. They absorb moisture easily and are easily decomposed by microbes. They are anti-static. The processing temperature of them is lower than that of conventional plastic. They are easily colored. Such resin is a kind of additive which should be blended with polyolefin materials like PE, PP, PVA, EVA, etc. to process finish products. It can be 100% degraded within 2 to 2.5 years in the laboratory conditions.

    Product Testing

       The degradation rate in 100 days is up to the adding ratio of it.

       Biodegradation can be achieved when blended with conventional plastic, like PE, PP, PVA, EVA, etc.

    Properties and Data:

    Testing Item

    Standard

    Unit

    Result

    Appearance

     

     

    Light Yellow

    Density

    GB 1033

    g/ cm3

    1.10 – 1.25

    Moisture Content

     

    %

    0.6– 1.5

    Melt Flow Index

    GB3682

    g/10 min

    0 - 2

    Tear strength

    GB 1040

    MPa

    ≥15

    Elongation

    GB 1040

    %

    ≥300

    Bio Substances Content

     

    %

    ≥90

    n-hexane Extracts

    GB/T5009.58

    %

    ≤4.0

    Rockwell hardness

    GB9342

    R gauge

     

    Softening point

    GB/1633

    ºC

    >65

    Degradation rate in 100days

    Degradation rate is affected by the adding ratio.

    The data for tensile strength and elongation refer to that of finished film products.

    Recommended Applications

    For all sorts of anti-static packing purposes, e.g. electronic product packaging, car interior covering film, electrical appliance packaging, agricultural mulch film, shopping bags, T-shirt bags, document folders, filter bags, storage bags, bin bags, tear-on-roll bags, disposable gloves, table cloths, aprons and rain coats, etc.

    Processing Equipment

            Common film blowing extruder, sheet extruder, bag making machine, printers, and heat sealing machines are all can be used.

    Processing Technology

         Best results will be achieved with a screw L/D ratio ≥ 28:1. The blow-up ratio should be more than 1:3 to obtain the maximum production yield and the best quality.

         LT-M-502F can be blown with LDPE/LLDP, E. It needs to contain 20-45% of LT-M-502F when blowing.

         Newly made film feels brittle, , or crispy. Its elongation is low. This is due to severe dehydration during production. Therefore, the film needs to be settled for a 24- hour curing period to regain elongation and anti-tear strength before being used to make finish products, e.g. bag-making or printing.

        The minimum thickness of film made of such material can be 10 microns.

    Remarks

           The price of LT-M -501F is lower than that of PE(LLDPE and HDPE) and PP, which is good to cut down the cost.

        Due to the high starch content, the resin easily absorbs moisture. So it needs to be stored in a dry environment. The package should also be sealed properly to prevent the ingress of moisture.

         In case the resin is damp, it should be dried for 2 hours at 80ºC.

        Its processing temperature is 5ºC to 10ºC lower than that of PE. During processing, the temperature is correct when corn starch fragrance can be smelled at the hopper.

         It can be easily decomposed into soil friendly substances in microbial environment.