Plastic Recycling Codes Explained for Buyers

If you are new to buying post-consumer recycled (PCR) plastics, you have likely noticed small numbers inside a triangle of arrows on plastic products. These are Resin Identification Codes (RICs), commonly called recycling codes. Understanding these codes is essential for any B2B buyer looking to source sustainable materials, ensure product quality, and meet regulatory compliance.

This guide breaks down each major plastic recycling code, discusses its suitability for PCR applications, and offers actionable advice for sourcing recycled content. By the end, you will have the confidence to evaluate suppliers and make informed purchasing decisions.

What Are Plastic Recycling Codes?

Developed in 1988 by the Plastics Industry Association, the RIC system (numbers 1 through 7) identifies the type of plastic resin used in a product. The code helps recycling facilities sort materials and informs buyers about the properties of the plastic. Importantly, the number does not indicate recyclability—it indicates the polymer type.

For B2B buyers, the code tells you about mechanical properties, thermal resistance, clarity, and how the material behaves when reprocessed into PCR content.

How to Read the Code

• Location: Usually molded into the bottom of containers or packaging.
• Symbol: Three chasing arrows with a number in the center.
• Limitation: The code is a resin identifier, not a guarantee the item is widely recyclable in your area.

The 7 Plastic Recycling Codes Explained

Code 1: PET or PETE (Polyethylene Terephthalate)

• Common uses: Soda bottles, water bottles, food jars (peanut butter, salad dressing).
• Properties: Clear, strong, lightweight, good barrier against moisture and gases.
• PCR availability: Excellent. PET is the most widely recycled plastic globally. PCR PET (rPET) is common in fiber (carpet, textiles), new bottles, and thermoform packaging.
• Buyer tip: rPET is highly consistent and food-grade. Ideal for consumer goods packaging, apparel fibers, and sheet products.

Code 2: HDPE (High-Density Polyethylene)

• Common uses: Milk jugs, detergent bottles, shampoo bottles, pipe, and lumber-composite products.
• Properties: Stiff, strong, resistant to chemicals and moisture. Typically opaque.
• PCR availability: Very high. PCR HDPE is used in pipe, automotive parts, industrial containers, and new bottle blenders.
• Buyer tip: HDPE has excellent mechanical properties after recycling. Look for post-consumer recycled (PCR) HDPE for non-food applications or food-grade when certified.

Code 3: [NO [NO PVC]] (Polyvinyl Chloride)

• Common uses: Pipes, window frames, flooring, some food wrap (rare in packaging today).
• Properties: Durable, resistant to sunlight and chemicals. Can be rigid or flexible.
• PCR availability: Very low. [NO [NO PVC]] is difficult to recycle due to chlorine content and additives. Most recycling programs do not accept it.
• Buyer tip: Avoid sourcing PCR content from [NO [NO PVC]] if possible. If unavoidable, work with specialty recyclers certified in vinyl recycling.

Code 4: LDPE (Low-Density Polyethylene)

• Common uses: Plastic bags, shrink wrap, squeeze bottles, some packaging film.
• Properties: Flexible, tough, translucent, resilient to stress cracking.
• PCR availability: Moderate to good. LDPE film is collected through store drop-off programs. PCR LDPE is used in new film, composite lumber, and molded parts.
• Buyer tip: PCR LDPE works well for flexible packaging, protective foams, and agricultural films. Expect some color variation and batch-to-batch differences.

Code 5: PP (Polypropylene)

• Common uses: Yogurt cups, bottle caps, straws, automotive parts, furniture.
• Properties: High melting point, excellent fatigue resistance (hinges), stiff, lightweight.
• PCR availability: Growing rapidly. Recycling infrastructure for PP has expanded significantly. PCR PP is used in automotive parts, home goods, and packaging.
• Buyer tip: PCR PP often has glass fiber reinforcement or mineral fillers available. Ideal for durable goods, electronics, and interior automotive components.

Code 6: PS (Polystyrene)

• Common uses: Foam takeout containers, egg cartons, disposable cutlery, insulation.
• Properties: Rigid, brittle, excellent insulation (foam).
• PCR availability: Low. PS recycling is limited. Most curbside programs do not include it. Some industrial recycling exists for densified PS.
• Buyer tip: Avoid specifying PCR PS for structural applications. If needed, source from specialized reclaimers. Expanded polystyrene (EPS) foam has slightly better recycling options.

Code 7: Other (Polycarbonate, Acrylic, PLA, etc.)

• Common uses: Reusable water bottles (polycarbonate), electronics housings, sunglasses, compostable plastics (PLA).
• Properties: Varies widely—from strong and transparent (polycarbonate) to biodegradable (PLA).
• PCR availability: Very low. This category is a catch-all. Most recyclers do not accept mixed Code 7. PLA requires industrial composting.
• Buyer tip: Be extremely cautious. If you need PCR from Code 7, ask for documented source stream. Prefer suppliers who can identify the exact polymer blend (e.g., "100% post-consumer polycarbonate").

Key Considerations for B2B Buyers

Quality and Consistency of PCR

PCR plastics can vary in color, melt flow index, and mechanical strength. When sourcing, ask suppliers for:

• Data sheets with test results for virgin benchmarks.
• Batch-to-batch consistency reports.
• Certification (e.g., UL Environment, SCS Global, or FDA food-contact status if needed).

Market Trends

Demand for PCR is rising due to corporate sustainability goals and regulatory pressure (e.g., packaging extended producer responsibility laws in Europe and some U.S. states). Codes 1, 2, and 5 are the most mature markets. Codes 3, 6, and 7 remain challenging but offer niche opportunities.

Cost Premiums

PCR plastics typically cost 5–40% more than virgin equivalents depending on the code, color, and purity. Budget accordingly and be prepared for price volatility as supply struggles to meet demand.

3–5 Key Takeaways

1. Focus on codes 1 (PET), 2 (HDPE), and 5 (PP) for the most reliable, high-volume PCR supply chains. These have established recycling loops and offer consistent quality.
2. Avoid codes 3 ([NO [NO PVC]]), 6 (PS), and 7 (Other) unless you have a specific application and verified source. Recycling infrastructure for these is limited, and consistency is poor.
3. Always request data sheets and certifications from PCR suppliers. Mechanical properties differ from virgin materials—verify that the PCR meets your performance requirements (impact strength, heat resistance, color stability).
4. Plan for color and processing adjustments. PCR plastics often have color variation (greyish, off-white, or mixed tones). Your manufacturing process or secondary processing may need fine-tuning.
5. Partner with reputable recyclers who can trace their material back to known post-consumer sources (