Choosing a Recycled Plastic Supplier: A Buyer's Checklist

A good recycled plastic supplier is worth more than a low rate. When granules or regrind arrive with the same MFI, colour and cleanliness every month, your production runs smoothly. When they do not, you pay for it in rejects, machine downtime and arguments over returns.

This checklist covers what to check before you place a first order and how to keep a supplier relationship working over time.

Business and compliance checks

• A valid GST registration that matches the company name on quotations and invoices.
• A physical address you can verify, ideally through a visit or a video call of the plant.
• How long they have been operating and which industries they already supply.
• Whether they are a recycler processing in-house or a trader. Both can be good partners, but a trader depends on someone else's process, so ask where the material is actually made.
• Consent to operate from the State Pollution Control Board for the processing unit and, if relevant to you, CPCB registration as a plastic waste processor.

Feedstock, process and test reports

Feedstock and process

Consistency in the output starts with consistency in the input. Ask:

• What scrap they use, and whether it is post-industrial or post-consumer.
• How they sort by polymer and colour.
• Whether material is washed, and how it is dried.
• What melt filtration they use when pelletising.
• Whether they add fillers, masterbatch or other polymers.

A supplier who can explain their process clearly usually controls it well.

Test reports

Ask for a test report for the lot you are buying, not a generic sheet. Relevant tests depend on the polymer:

Test	Why it matters
MFI	Indicates flow and suitability for your process
Density	Confirms the polymer and signals fillers
Ash content	Shows filler or inorganic contamination
Moisture	Critical for PET, nylon, PC and ABS; affects yield for all
Intrinsic viscosity	Key quality parameter for PET
Impact and tensile strength	Needed where mechanical performance matters

Ask whether tests are done in-house on every batch or only occasionally at an outside lab. Our recycled plastic quality checklist goes into more detail.

Samples and trial runs

• Insist on a representative sample from the actual lot, not a hand-picked handful.
• Test the sample on your own machine, not just in the lab.
• Note the lot number and keep part of the sample as a reference.
• When the bulk order arrives, compare it with the reference sample before using it.

If the trial works, start with a modest first order rather than committing to a large volume straight away.

Commercial terms and red flags

Terms to agree in writing

• Price basis: per kg or per MT, ex-works or delivered, with GST shown separately.
• Packing type and whether bags are labelled with lot numbers.
• Lead time and the volume they can realistically supply each month.
• Payment terms that are fair to both sides, such as part-advance for a first order.
• A clear rejection policy: how quality is judged on arrival, how quickly complaints must be raised and who pays freight on rejected material.

Red flags

• Rates well below other suppliers for the same grade with no clear reason.
• Reluctance to send samples or test reports.
• Invoices from a different entity than the one you dealt with.
• Pressure for full advance on a large first order.
• Vague answers about feedstock and process.

Track performance over time

After the first few orders, rate each supplier on a simple record: on-time delivery, lot-to-lot consistency, test results against promised specifications, response time to queries and how complaints were handled. Review it every few months.

Keeping two qualified suppliers for each critical material protects you if one has a feedstock shortage. When you need to brief new suppliers, a well-written plastic RFQ makes their offers easier to compare.

Let the sourcing desk do the groundwork

PlasticSetu's sourcing desk works with verified suppliers, collects quotations against your written requirement, arranges samples and tracks dispatch and delivery. You still make the final decision; the desk helps you get comparable offers faster. Get quotes to post your requirement.