Introduzzjoni materjali 

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 

L-aċidu polilattiku PLA juża l-aċidu lattiku bħala l-materja prima ewlenija, prinċipalment miksuba minn kassava, qamħirrum, kannamieli u ħxejjex aromatiċi oħra biex jikseb kontenut ta 'lamtu u zokkor ta' aċidu lattiku miksub permezz ta 'fermentazzjoni batterika, u finalment jifforma polimeru miksub permezz ta' polimerizzazzjoni ta 'aċidu polilattiku (PLA). ). Is-sors tal-materja prima huwa suffiċjenti u rinnovabbli. 

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. 

Karatteristiċi tal - materjal

1. L-aċidu polilattiku (PLA) huwa tip ġdid ta 'materjal bijodegradabbli b'bijodegradabilità tajba. Wara l-użu, jista 'jiġi degradat kompletament minn mikro-organiżmi fin-natura, u finalment jiġġenera dijossidu tal-karbonju u ilma, li ma jniġġesx l-ambjent, li huwa ta' benefiċċju kbir għall-protezzjoni tal-ambjent. , huwa materjal rikonoxxut li jirrispetta l-ambjent.

2. Il-film tal-aċidu polilattiku (PLA) għandu permeabilità tajba tal-arja, permeabilità tal-ossiġnu u permeabilità tad-dijossidu tal-karbonju. Għandu wkoll il-karatteristiċi ta 'iżolament tar-riħa. Huwa l-uniku plastik bijodegradabbli bi proprjetajiet antibatteriċi u antifungali eċċellenti.

3. Meta taħraq l-aċidu polilattiku (PLA), il-valur kalorifiku tal-kombustjoni tiegħu huwa l-istess bħal dak ta 'l-inċinerazzjoni tal-karta, li hija nofs dik ta' l-inċinerazzjoni tal-plastiks tradizzjonali (bħal polyethylene), u l-inċinerazzjoni tal-PLA qatt ma se tirrilaxxa gassijiet tossiċi bħal nitruri u sulfidi . . Il-ġisem tal-bniedem fih ukoll aċidu lattiku f'forma monomerika, li tindika s-sigurtà ta 'dan il-prodott degradabbli.

Proprjetajiet naturali u vantaġġi

1. Il-valur tal-pH huwa madwar 6, li huwa dgħajjef aċiduż.

2. Inibizzjoni tad-dud, ir-rata ta 'inibizzjoni tal-prestazzjoni kontra d-dud tad-dejta tat-test hija 71.39%, u l-konklużjoni hija li għandha effett kontra d-dud.

3. L-effett antibatteriku huwa ovvju, u r-rata ta 'telf ta' Staphylococcus aureus, Candida albicans u Escherichia coli hija aktar minn 98%. (Testjar awtorevoli SGS) 

4. L-ebda mediċina antibatterika, kontra d-dudu jew sustanzi kimiċi oħra ma huma miżjuda fil-proċess ta 'produzzjoni, li huwa kompletament il-prestazzjoni tal-proprjetajiet naturali tiegħu.

5. Naturali li titfi waħedha: mhux fjammabbli, u l-indiċi tal-limitu tal-ossiġnu huwa ogħla minn dak tal-poliester u tan-najlon.

6. Il-prestazzjoni tal-insulazzjoni termali hija 1.8 darbiet akbar minn dik tal-qlub tal-qoton ta 'kwalità għolja. (Data tat-test)

7. Rebound tajjeb, bulkiness qawwi, tħossok bla xkiel, tnixxif ta 'malajr u reżistenza UV. 

Użu tal-materjal

L-aċidu polilattiku għandu stabbiltà termali tajba,it-temperatura tal-ipproċessar hija 170 ~ 230 ℃, u għandu reżistenza tajba għas-solvent. Jista 'jiġi pproċessat f'diversi modi, bħal estrużjoni, għażil, tiġbid biaxjali, iffurmar b'injezzjoni. Minbarra li huma bijodegradabbli, prodotti magħmula minn aċidu polilattiku għandhom bijokompatibilità tajba, tleqqija, trasparenza, sensazzjoni tal-idejn u reżistenza għas-sħana, kif ukoll ċerti reżistenza għall-batterja, ritardanza tal-fjammi u reżistenza UV, għalhekk huma utli ħafna. b'mod wiesa'. 

Materjali bijodegradabbli użati fil-mediċina, organi umani u oqsma oħra jistgħu jiġu modifikati biex jiddisinjaw u jimmanifatturaw materjali bijodegradabbli mingħajr plastiċizzanti, metalli tqal u kimiċi tossiċi, bisfenol A, indipendenti mir-riżorsi taż-żejt, u sikuri għall-kuntatt mal-ikel; 

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. 

Applikazzjoni Sostenibbiltà 

1. Naqqas l-użu ta 'materjali petrokimiċi u tnaqqas l-emissjonijiet tal-karbonju 

2. Uża materja prima naturali rinnovabbli (bħal: lamtu tal-pjanti, kannamieli taz-zokkor, fibra tat-tiben, eċċ.)

3. Adotta proċess ta 'manifattura aħdar u sigur

4. Kompatibbli mas-sistema eżistenti ta 'ġestjoni ta' skart solidu

5. Jista 'jiġi inċinerat - kombustjoni kompletament nadifa

6. Jistgħu jintremew fil-miżbliet - l-ebda lissija jew sustanzi tossiċi u ta 'ħsara

7. Kompostabbli 

8. Jista 'jiġi riċiklat u pproċessat f'monomeri jew prodotti oħra

9. Oħloq ambjent ta 'għajxien tajjeb għall-ġenerazzjonijiet futuri u ttejjeb il-kwalità tal-ħajja 

Id-degradazzjoni tal-PLA tindika 

Degradazzjoni tal-kompost: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% 

Hemm ċerti mikrobi 

degradazzjoni tal-miżbla: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. 

L-istatus tal-industrija u l-prospetti

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.