Mawu oyamba 

PLA (polylactic acid) biodegradable material refers to a class of materials that are degraded by the action of microorganisms such as bacteria, molds (fungi) and algae that exist in nature. Chinese alias: polylactide (also known as polylactic acid) English name: polylactide, polylactic acid, abbreviated PLA English alias: polytrimethylene carbonate; 1,3-Dioxan-2-one homopolymerMolecular formula: (C3H4O2)n 

PLA polylactic acid amagwiritsa ntchito asidi lactic monga waukulu zopangira, makamaka kuwapeza chinangwa, chimanga, nzimbe ndi zitsamba zina kupeza wowuma ndi shuga zili lactic acid akamagwira bakiteriya nayonso mphamvu, ndipo potsiriza amapanga polima akamagwira polymerization wa asidi polylactic (PLA). ). Gwero la zopangira ndizokwanira komanso zongowonjezwdwa. 

The entire production process of polylactic acid and polylactic acid fiber does not involve any harmful substances. It is a kind of polymer material with excellent performance, which can be completely decomposed by environmental microorganisms after being discarded, and finally be inorganicized and become an integral part of the carbon cycle in nature. 

Zizindikiro zakuthupi

1. Polylactic acid (PLA) ndi mtundu watsopano wa zinthu zomwe zimatha kuwonongeka ndi biodegradability yabwino. Pambuyo pa ntchito, ikhoza kuonongeka kwathunthu ndi tizilombo tating'onoting'ono m'chilengedwe, ndipo potsiriza imapanga mpweya woipa ndi madzi, omwe saipitsa chilengedwe, chomwe chimapindulitsa kwambiri kuteteza chilengedwe. , ndi zinthu zodziwika bwino zoteteza chilengedwe.

2. Filimu ya Polylactic acid (PLA) imakhala ndi mpweya wabwino, mpweya wabwino komanso carbon dioxide permeability. Lilinso ndi makhalidwe kudzipatula fungo. Ndilo pulasitiki yokhayo yomwe ingawonongeke yomwe ili ndi antibacterial komanso antifungal properties.

3. Pamene incinerating asidi polylactic (PLA), kuyaka kwake calorific mtengo ndi wofanana ndi incinerating pepala, amene ndi theka la incinerating mapulasitiki chikhalidwe (monga polyethylene), ndi incinerating PLA sidzatulutsa mpweya wapoizoni monga nitrides ndi sulfides. . . Thupi la munthu limakhalanso ndi lactic acid mu mawonekedwe a monomeric, zomwe zimasonyeza chitetezo cha mankhwala osokoneza bongo.

Natural katundu ndi ubwino

1. Mtengo wa pH uli pafupi ndi 6, yomwe imakhala yochepa kwambiri.

2. Kuletsedwa kwa nthata, kulepheretsa ntchito ya anti-mite ya deta yoyesera ndi 71.39%, ndipo mapeto ake ndi oti ali ndi anti-mite effect.

3. Mphamvu ya antibacterial ikuwonekera, ndipo kutayika kwa Staphylococcus aureus, Candida albicans ndi Escherichia coli ndi oposa 98%. (Kuyesa kovomerezeka kwa SGS) 

4. Palibe mankhwala oletsa antibacterial, anti-mite kapena mankhwala ena omwe amawonjezedwa popanga, zomwe ndizochita zonse za chilengedwe chake.

5. Kuzimitsa kwachilengedwe: kosayaka moto, ndipo chiwerengero cha malire a oxygen ndi apamwamba kuposa polyester ndi nylon.

6. Ntchito yotchinjiriza kutentha ndi nthawi 1.8 kuposa ya thonje yapamwamba kwambiri. (Zoyeserera)

7. Kubwereranso kwabwino, kuchuluka kwamphamvu, kumva bwino, kuyanika mwachangu komanso kukana kwa UV. 

Kugwiritsa ntchito

Polylactic acid imakhala ndi kukhazikika kwamafuta abwino,processing kutentha ndi 170 ~ 230 ℃, ndipo imakhala ndi mphamvu yabwino yosungunulira. Iwo akhoza kukonzedwa m'njira zosiyanasiyana, monga extrusion, kupota, biaxial kutambasula, jekeseni kuwomba akamaumba. Kuphatikiza pa kukhala biodegradable, mankhwala opangidwa ndi asidi polylactic ndi biocompatibility wabwino, gloss, transparency, manja kumva ndi kutentha kukana, komanso ena mabakiteriya kukana, retardancy lawi ndi UV kukana, kotero iwo ndi zothandiza kwambiri. mochuluka. 

Zinthu zowonongeka zomwe zimagwiritsidwa ntchito muzamankhwala, ziwalo za anthu ndi madera ena zimatha kusinthidwa kuti zipangidwe ndi kupanga zinthu zowonongeka popanda plasticizers, zitsulo zolemera ndi mankhwala oopsa, bisphenol A, osadalira mafuta a petroleum, komanso otetezeka kukhudzana ndi chakudya; 

The molding process can be selected from injection molding, extrusion, blow molding, and blister molding, which is suitable for household daily necessities, tableware products in contact with food or oral cavity, etc.;It can be widely used as packaging materials, fibers and non-woven fabrics, etc., and is mainly used in clothing (underwear, outerwear), industry (construction, agriculture, forestry, papermaking) and medical and health fields. 

Kugwiritsa Ntchito Kukhazikika 

1. Chepetsani kugwiritsa ntchito zinthu za petrochemical ndikuchepetsa kutulutsa mpweya 

2. Gwiritsani ntchito zipangizo zongowonjezwdwanso zachilengedwe (monga: wowuma chomera, nzimbe, ulusi wa udzu, ndi zina zotero)

3. Landirani njira zopangira zobiriwira komanso zotetezeka

4. Yogwirizana ndi njira yoyendetsera zinyalala yomwe ilipo

5. Ikhoza kutenthedwa - kuyaka koyera kwathunthu

6. Itha kutayidwa - palibe zotayira kapena zapoizoni komanso zovulaza

7. Compostable 

8. Itha kusinthidwanso ndikusinthidwa kukhala ma monomers kapena zinthu zina

9. Pangani malo abwino okhalamo kwa mibadwo yamtsogolo ndikuwongolera moyo wabwino 

Kuwonongeka kwa PLA kumawonetsa 

Kuwonongeka kwa kompositi:PLA can achieve full biodegradation within 180 days under compost degradation conditions, and the final degradation products are carbon dioxide and water. The composting conditions are as follows:The temperature is 58±2℃Humidity is 98% 

Pali ma microbial ena 

kuwonongeka kwa nthaka:landfill conditions are different from composting conditions, so the degradation rate of PLA is slower, generally taking 2-5 years, but the degradation products do not pollute groundwater, do not damage plant growth, and do not waste arable land. degradation.Incineration : PLA has a small combustion calorific value, and the complete combustion products are carbon dioxide and water, which does not pollute the air. 

Mkhalidwe wamakampani ndi ziyembekezo

The price of PLA before large-scale industrialization is $1000/kg. Later, large-scale production was achieved through the industrialization research of Professor Ramani Narayan's research group at Michigan State University. The technology is now industrialized by Natureworks. The largest manufacturer of PLA is NatureWorks in the United States, followed by China's Hisun Bio, whose current output is 100,000 tons and 5,000 tons respectively. PLA has many applications and can be used in extrusion, injection molding, film drawing, spinning and other fields. PLA fiber uses natural and renewable plant resources as raw materials, which reduces the dependence on traditional petroleum resources and meets the requirements of sustainable development of the international community. It has both the advantages of synthetic fibers and natural fibers, and at the same time has the characteristics of complete natural circulation and biodegradation. Compared with conventional fiber materials, corn fiber has many unique properties, so it has been widely valued by the international textile industry.