Material guide
FDA-Compliant Plastics for Food Contact: What to Use and What to Ask For
Which plastics are FDA compliant for food contact, what "FDA compliant" actually means, and what to ask your supplier for, including NSF, 3-A, USDA and metal-detectable plastics for food processing.
Most common plastics come in FDA-compliant grades: natural UHMW, HDPE, polypropylene, acetal, nylon, PET, polycarbonate, acrylic, PTFE, PVDF and PEEK, among others. What matters is the specific grade (including color and fillers), so ask your supplier for an FDA compliance letter for the exact material, plus NSF, 3-A or USDA documentation if your plant requires it.
What "FDA compliant" actually means
The FDA doesn't approve or certify individual plastic sheets or rods. Instead, the regulations in 21 CFR (Parts 174 to 178, the "indirect food additive" rules) list which polymers and additives may contact food, and under what conditions. A resin manufacturer then states that a given grade complies. That's why compliance is grade-specific: the same plastic in a different color, with a filler, or from recycled material may not comply.
Compliance is also tied to use conditions, such as temperature and the type of food (fatty, acidic, aqueous). A grade suitable for room-temperature dry goods may not be suitable for hot, fatty foods.
Common FDA-compliant plastics and where they're used
| Plastic | Typical food uses | Notes |
|---|---|---|
| UHMW | Wear strips, guides, star wheels, scrapers, liners | Natural grade most common; metal-detectable grades available |
| HDPE | Cutting boards, prep surfaces, tanks, bins | Cutting-board grades are made for knife wear |
| Polypropylene | Tanks, trays, cutting boards, fittings | Good chemical resistance; handles hot water better than PE |
| Acetal | Bushings, rollers, gears, valve parts, fillers | Copolymer holds up better to hot water and caustic washdowns |
| Nylon | Rollers, gears, wear pads | Absorbs moisture; check filled grades separately |
| PET (e.g. Ertalyte-type) | Precision parts, filler valves, pistons | Low moisture, good wear, very dimensionally stable |
| Polycarbonate / acrylic | Guards, windows, sight glasses, displays | Clear; check cleaners for chemical compatibility |
| PTFE, PVDF, PEEK | Seals, high-temp and chemical parts | For heat, steam and aggressive cleaning |
Examples of plastics commonly available in compliant grades. Compliance depends on the exact grade and use conditions.
FDA vs NSF vs 3-A vs USDA
- FDA (21 CFR): covers the material's composition. This is the baseline almost every food plant asks for.
- NSF/ANSI 51: certification for materials used in food equipment, often required by equipment builders.
- 3-A Sanitary Standards: mainly dairy equipment, with specific material and design rules.
- USDA: often referenced in meat and poultry plants; ask your customer what documentation their inspectors expect.
- EU 10/2011: the European regulation for plastics in food contact, if equipment ships to Europe.
Colors, fillers and metal-detectable plastics
Natural (uncolored) grades are the safest bet for compliance. Many colored grades also comply, and blue is popular in food plants because it stands out against food. Metal-detectable plastics carry an additive that lets detectors and X-ray systems find broken fragments, a common requirement under food safety programs for parts that could chip into product. Glass-filled, recycled and regrind materials usually don't comply, so check before you substitute.
What to ask your supplier for
- An FDA compliance letter (or certificate) for the exact grade and color
- NSF, 3-A or USDA documentation if your customer requires it
- Material certs and lot traceability for your quality file
- Whether the grade is suitable for your temperatures, cleaners and food type
- A metal-detectable option if parts could break into the product stream
Tip from the counter: "food grade" on a quote means nothing without the paperwork. Ask for the compliance letter up front so the part doesn't get held up at the customer's incoming inspection.
Common questions
Which plastics are safe for food contact?
Many common engineering plastics are available in FDA-compliant grades, including natural UHMW, HDPE, polypropylene, acetal, nylon, PET, polycarbonate, acrylic, PTFE, PVDF and PEEK. The key word is grade: compliance depends on the specific resin and additives (including colorants and fillers), not just the plastic family. Always get a compliance statement for the exact grade.
What does FDA compliant mean for plastics?
It means the resin and its additives are made from substances permitted by the FDA for food contact under 21 CFR (the indirect food additive regulations, Parts 174 to 178), for the intended conditions of use such as temperature and food type. The FDA doesn't "approve" individual plastic products; manufacturers state compliance with the regulations, usually in a letter for each grade.
What is the difference between FDA, NSF, USDA and 3-A?
FDA compliance covers the material itself. NSF/ANSI 51 certifies materials used in food equipment. 3-A Sanitary Standards apply mainly to dairy equipment. USDA acceptance is often referenced for meat and poultry plants. Many food plants require FDA compliance plus one of these, so check what your customer or auditor actually needs.
Is number 2, 4 or 5 plastic safe?
Those recycling codes stand for HDPE (#2), LDPE (#4) and polypropylene (#5), which are widely used for food containers and are generally considered food-safe in their intended use. For industrial parts and stock shapes, though, the recycling code isn't enough: ask for the compliance letter for the specific grade.
What are metal-detectable plastics?
They're plastics (often blue) filled with a metal additive so that a broken piece can be found by the plant's metal detectors or X-ray systems. They're common for scrapers, guides, wear strips and other parts that could chip into the product stream. Several FDA-compliant detectable grades exist in UHMW, acetal, nylon and PEEK.
This guide is a general overview, not legal or regulatory advice. Food-contact compliance depends on the exact grade, color, additives and conditions of use, and regulations change. Get the compliance letter and material certifications for your exact grade from your supplier, and confirm requirements with your food safety team or customer before you specify.
Who stocks and machines it
Distributors that stock these materials and shops that machine or fabricate them, from the Stock & Shape directory.
UHMW
- Calsak Plastics – Tucson Tucson, AZ
- Laird Plastics – Detroit Shelby Township, MI
- Piedmont Plastics – Dallas Grand Prairie, TX
- Total Plastics – Indianapolis Indianapolis, IN
- CGR Products – Greensboro Greensboro, NC
- Hi Rel Plastics & Molding Riverside, CA
- K&E Plastics Bennington, VT
- Portland Precision Manufacturing Portland, OR
HDPE
- Curbell Plastics – Dallas-Fort Worth Arlington, TX
- Laird Plastics – Columbus Columbus, OH
- Multi-Craft Plastics – Portland Tigard, OR
- Piedmont Plastics – Westchester Thornwood, NY
- Alpha Plastics Solutions Muskego, WI
- H&S Machine Salt Lake City, UT
- Insulfab Plastics – Spartanburg Spartanburg, SC
- Zober Industries Croydon, PA
Acetal (Delrin)
- Cope Plastics – Hiawatha Hiawatha, IA
- Interstate Advanced Materials – Portland Portland, OR
- Laird Plastics – Orlando Orlando, FL
- Piedmont Plastics – Westchester Thornwood, NY
- Ehren-Haus Industries Fort Mill, SC
- J & N Metal Products Brazil, IN
- Maximum Industries Irving, TX
- Miles Products Brunswick, OH
Polypropylene
- Calsak Plastics – Atlanta Lawrenceville, GA
- Curbell Plastics – Cincinnati Cincinnati, OH
- Interstate Advanced Materials – Seattle Kent, WA
- Multi-Craft Plastics – Eugene Eugene, OR
- Boyd Machine Co. Souderton, PA
- Mountain CNC Loveland, CO
- NN, Inc. – Algonquin Algonquin, IL
- The Wehrmeyer Group Dallas, GA