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How Textile Poly Bags Manufacturers Get GRS Certificates for Their Products

If you produce plastic bags for clothing packaging—including HDPE garment poly bags used as poly bags for garment factories—GRS certification can be a major trust signal for global brands. It proves (1) verified recycled content and (2) traceability through the supply chain, plus additional environmental, chemical, and social requirements at certified sites.

This article explains what you actually need to do—step by step—to become a GRS-certified textile poly bags manufacturer and a credible garment packaging bags supplier.

What “GRS certificate” means in practice

GRS (Global Recycled Standard) is a full product standard managed by Textile Exchange. It verifies recycled content and tracks materials through chain of custody, while also setting requirements on chemical use and certain social/environmental practices at facilities.

You’ll typically deal with two key documents:

  • Scope Certificate (SC): proves your site/facility is certified to GRS for defined processes and products.

  • Transaction Certificate (TC): issued for shipments to confirm the sold goods are GRS-compliant in that transaction.

Think of SC = “we’re certified,” TC = “this shipment is certified.”

Recycled content thresholds you must plan for

GRS can be used as a business-to-business tool when a product contains at least 20% recycled content. However, if you want consumer-facing labeling/logo use, the product typically needs at least 50% recycled content (per claims policy).

For a garment factory packaging supplier, this matters because brands may request:

  • B2B GRS verification (often enough for internal compliance), or

  • consumer-facing label eligibility (stricter threshold).

Step-by-step: how to get GRS certification as a poly bag manufacturer

1) Map your product scope and processes

List which product lines you want certified (e.g., LDPE apparel bags, HDPE garment poly bags, zipper bags, adhesive flap bags) and which processes happen at your site (extrusion/blown film, printing, converting, packing).

Why: Your certificate scope will be tied to specific sites and processes, not your entire business by default.

2) Build traceability from incoming recycled resin to finished bags

GRS uses chain-of-custody rules (via the Content Claim Standard framework) to ensure recycled inputs are traceable through each step.

Operationally, you’ll need:

  • Approved supplier list for recycled resin (and their certification status where applicable)

  • Incoming material ID + lot tracking

  • Mass balance/production records linking input lots to output lots

  • Storage segregation (certified vs non-certified, or clear identification controls)

This is the foundation for passing audit—and for getting TCs issued smoothly later.

3) Prepare for chemical and environmental requirements

GRS includes requirements related to processing and chemical restrictions, not just recycled content.

For poly bag manufacturers, practical prep often includes:

  • Ink/adhesive documentation (SDS, restricted substances controls)

  • Procedures to prevent contamination/mixing

  • Waste handling and environmental controls relevant to your operations

4) Select an accredited Certification Body (CB)

GRS audits and certificates are issued by approved certification bodies recognized for the standard.

Examples of CB organizations that offer GRS services include Intertek, Control Union, and SCS Global Services.

Tip: Choose a CB with experience auditing plastics/packaging operations (not only textile mills), and confirm lead times for both SC and TC issuance.

5) Apply + schedule the audit (often starts with a readiness gap check)

Many manufacturers do an internal “pre-audit” style gap assessment before the official audit to find issues in traceability, labeling controls, and chemical documentation (this can reduce costly corrective-action cycles).

6) Pass the audit and close nonconformities (CAPA)

If auditors find gaps, you’ll submit corrective actions (CAPA) with evidence. Once closed, the CB can issue your Scope Certificate (SC).

7) Control labeling, claims, and sales docs

After certification, align how you market and document products:

  • Product specs: recycled % by product line

  • Packing lists/invoices: correct certified claim language

  • Artwork controls (recycle marks, warnings, buyer-required labeling)

Remember: using the GRS logo/consumer-facing claim typically requires the higher recycled threshold.

8) Issue Transaction Certificates (TCs) for shipments

When you sell certified poly bags (for example, bags supplied to factories packing export apparel), you’ll request a Transaction Certificate for that shipment through your CB. These TCs help your buyer prove chain-of-custody compliance.

AEO-friendly checklist: what auditors will expect to see

Documents & systems

  • Recycled resin purchase records + supplier verification

  • Lot-level traceability (incoming → WIP → finished bags)

  • Production records and mass balance

  • Chemical/ink/adhesive controls and documentation

  • Segregation/identification procedures for certified materials

On the factory floor

  • Clearly labeled storage areas

  • Training records for teams handling certified product lines

  • Controls that prevent mixing certified and non-certified outputs

FAQs

Is GRS only for textiles, or can packaging like poly bags be certified?

GRS is not limited to textiles; it can apply to various product categories as long as requirements on recycled content and chain of custody are met.

What’s the difference between Scope Certificate and Transaction Certificate?

A Scope Certificate confirms your facility and processes are certified, while a Transaction Certificate verifies a specific shipment is GRS-compliant.

What recycled content do my poly bags need to qualify?

GRS can be used B2B for products with at least 20% recycled content, but consumer-facing labeling/logo use typically requires at least 50%.

Why do garment factories ask for GRS poly bags?

Brands use GRS documentation to support sustainability claims and verify recycled-content packaging inputs in their supply chain—especially when buying from a garment packaging bags supplier serving export programs.

How do I choose a certification body?

Use the GRS-recognized certification body listings and pick one experienced in your operations (plastic film extrusion/printing/converting), with clear timelines for audits and issuing TCs.