Vrste Plástika: Koje mogu biti reciklirane i pod kojim uvjetima?
Brojevi 1–7 identificiraju široke grupe rezina; oni nisu obećanje da će stavka biti prihvaćena ili moći postati prodajni reciklirani proizvod. Recikliranje ovisi o dizajnu proizvoda, prikupljanju, sortiranju, kontaminaciji, dostupnosti procesiranja i tržištu za sljedeću fazu. Ista polimera može biti reciklirana kao čista tvornička otpadna struja ali nepristojna u malom, višeslojnom ili kontaminiranom potrošačkom proizvodu.
Kod rezine nije reciklirana klasa
ASTM kodovi identifikacije rezine pomažu identificirati porodicu plastične rezine. Uputstvo StopWasteove kod identifikacije rezine navodi da uporaba koda ne implikira da će stavka biti reciklirana ili da postoje reciklacijski sustavi za nju.
Za kućansko brcanje, U.S. EPA savjetuje provjeriti što prihvaća lokalni program jer lokalni programi ne prihvaćaju svaki tip plástika. Pogledajte njegovu smjernicu o uobičajenim recikliranim stavkama. Průmysloví reciklacijski poduzetnici trebaju još specifičniji ulazni i kupci specifikacije.
Sedam kategorija rezina
| Kodirati | Grupa rezine | Uobičajeni proizvodi | Realnost recikliranja |
|---|---|---|---|
| 1 | LJUBIMAC | Beveridžne butele, termooblikovane, vlakna i vezice | Postoje ustaljeni pravci za butele, ali boja, PVC, etikete, pladne i zahtjevi za stvaranjem kontakta s hranom su važni. |
| 2 | HDPE | Butele, kutije, cjevove, zatvarači | Prirodne i bojene tvrde struje mogu imati snažne izlaze; PP, punjači i ostatci proizvoda zahtijevaju kontrolu. |
| 3 | PVC | Cjevove, profili, kabeli, podovi i fleksibilni proizvodi | Posvećene struje mogu biti reciklirane; dodaci i mešana kontaminacija čine složeno procesiranje teškim. |
| 4 | LDPE | Film, torbe, umanjeni omotač i poljoprivredni film | Čist komercijalni film može biti recikliran; tanki format, zemlja, hranu i višeslojne struje ograničavaju prikupljanje i pranje. |
| 5 | PP | Zatvarači, lonice, kutije, vezane torbe i automobilski dijelovi | Tvrde i fleksibilne PP zahtijevaju različitu pripremu; mješanje, punjači i priloženi materijali utječu na kvalitetu. |
| 6 | P.S | Tvrde šalice, lonice i proširenog plasta | Definirane tvrde ili EPS struje mogu biti reciklirane gdje postoje prikupljanje i izlazi; slobodni EPS zahtijeva zagusinjenje. |
| 7 | ostalo | PC, PA, ABS, PLA, višeslojne i neoznačene rezine | To nije jedan materijal. Svaka polimera ili kompozit zahtijeva identifikaciju i specifičan proces te tržište. |
Kod 1: PET
Post-konzumerske PET butele se često sortiraju, granuliraju, prane, razlikuju po gustini i sušene u čipove. Kvalificirani materijal može postati vlakno, ploča, vezica ili nove butele. Traye, nepriručni PET, višeslojne i nebuteljske proizvode mogu se ponašati drugačije od prozirnih pićnih butela.
PET i PVC često plave u vodi, tako da razlikovanje po gustini ne može pouzdanom razdvojiti. Boja, lepljivo, etikete, vlažnost i intrinsična viskoznost mogu također kontrolirati izlaz. The PET flake applications guide links these quality properties to end uses.
Code 2: HDPE
Natural HDPE bottles, coloured bottles, crates, caps and pipe should not automatically be mixed. Natural bottle resin may have different buyer requirements from a mixed-colour injection stream. Product residue and odour can require additional intake and washing controls.
In water, unfilled HDPE and PP commonly float together. A float tank can reject many heavy contaminants but cannot reliably produce an HDPE/PP split. APR’s natural HDPE guidance shows how colour, labels, closures and additives affect the stream.
Code 3: PVC
Rigid PVC pipe and window profiles can be processed in dedicated, well-characterised streams. Flexible PVC cable, flooring and medical products may contain different plasticisers, fillers, reinforcements or other components. Legacy products can also require restricted-substance assessment.
Keep PVC separate from PET and polyolefin lines. Cutting, dust control, washing and extrusion must match the specific PVC product and downstream application; there is no generic “chlorine-safe” machine that makes all PVC waste equivalent.
Code 4: LDPE and flexible PE
Clean transport film and production trim are easier to recycle than wet agricultural film or multilayer consumer packaging. Flexible material has low bulk density, traps moisture and can wrap rotating equipment.
Typical processing can include shredding, friction washing, rinsing, squeezing or other dewatering, densification and pelletizing. CEFLEX’s flexible packaging recyclability guidance explains why structure, attachments and size influence polyolefin recycling.
Code 5: PP
PP appears in rigid tubs, caps, crates, automotive parts, woven sacks and nonwovens. These formats require different feeding, size reduction and washing. Mineral-filled or glass-reinforced PP can have a different effective density and outlet from unfilled packaging PP.
A recycler should separate rigid and flexible formats and define colour, filler, ash, melt flow and contamination with the buyer. Washing removes surface contamination; it does not restore degraded resin or separate every PP compound.
Code 6: PS and EPS
Rigid polystyrene and expanded polystyrene are the same resin family in different physical forms, but collection and equipment differ. Loose EPS is mostly volume and needs source segregation and densification to make transport practical.
A cold press mechanically compacts EPS, while a hot melt densifier produces a thermally densified ingot. See the EPS cold press versus hot melt guide. Food residue, tape, construction foam and mixed foams still need control.
Code 7: “Other” is not a recycling process
Code 7 can cover polycarbonate, polyamide, ABS, PLA, multilayer structures and other resins. Combining them creates an unidentified mixture with unpredictable melting and mechanical properties.
Identify the actual polymer using supplier records, product knowledge and analytical testing where necessary. Clean, separated engineering-plastic production scrap may have a viable outlet, while a mixed composite may not be suitable for mechanical recycling.
Why the product matters as much as the resin
Size, shape, colour, labels, adhesives, coatings, fillers and multilayers affect collection and processing. A large HDPE bottle can be sorted by equipment that cannot reliably identify a small black component. A mono-material film and a laminated pouch can carry the same printed code but behave differently in washing and extrusion.
Use material-specific design guidance and buyer trials rather than declaring an entire resin category recyclable or unrecyclable.
Mechanical recycling decision test
- Can the material be collected in sufficient quantity?
- Can the polymer and product format be identified?
- Can incompatible or unsafe items be removed?
- Can it be size-reduced, cleaned and dried without unacceptable loss?
- Can the output meet a buyer’s written specification?
- Do the site, environmental and worker controls support the process?
- Does the dry mass balance and full cost model support operation?
A “no” at one stage identifies the barrier that must be solved. It does not mean a different machine automatically fixes the stream.
Typical equipment by material form
| Oblik ulaza | Typical functions | Main caution |
|---|---|---|
| Rigidi butele i kontejneri | Sorting, granulation, washing, density separation and drying | Previous contents, labels, closures and polymer mixing |
| Film and bags | Shredding, friction washing, rinsing, squeezing and pelletizing | Low bulk density, moisture, wrapping and multilayers |
| Pipe and profiles | Shredding, granulation, dust control and material-specific extrusion | Metal, fillers, wall thickness and legacy additives |
| EPS pjena | Sorting, crushing and cold or hot densification | Količina prijevoza, preostali hranični otpad i mješovite valovine |
| Otpad iz inženjerskih plastičnih materijala | Identifikacija, smanjenje veličine, sušenje i komponovanje | Kvalitet, pojačavanje, založivački sredstva i termička povijest |
Česta pitanja
Broj unutar trokuta znači da li je proizvod reciklabilan?
Ne. Identifikuje grupu smole. Stvarna reciklabilnost ovisi o dizajnu proizvoda, lokalnoj sakupljanju, sortiranju, procesiranju i tržištu za nastali materijal.
Koji plastični materijal je najlakši za reciklirati?
Nema univerzalnog odgovora. Čiste, konzistentne PET ili HDPE boce često imaju uspostavljene sustave, ali čista tvornička otpadna surovinu drugog polimera može biti lakša nego kontaminirana pakovanja.
Mogu li različite vrste plástika biti reciklirane zajedno?
Samo kada specifikacija nizvodne strane prihvati mješavinu i isprobani ispostave potvrde procesiranje i osobine. Nekontrolirano mješanje polimera često smanjuje kvalitetu.
Identificiraj tok prije izbora opreme
Pošalji Energycle stvarne vrste proizvoda, dokazi iz smola, kontaminacija, mjesečna dostava i specifikacija kupca. Koristi Vodič za opremu za recikliranje plastike da bi je svaki potvrđeni materijalni tok mapirao na zahtjevane procesne funkcije.
