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3 Mil Low Density Flat Bags by LK Packaging
Premium 3 mil LDPE flat poly bags from LK Packaging (formerly Elkay Plastics) deliver reliable protection for food service, retail, and industrial applications. These versatile bags combine durability with flexibility, perfect for packaging dry goods, bakery items, parts, and more.
Why Choose 3 Mil LDPE Bags?
- Food Safe: FDA-compliant materials ideal for direct food contact
- Durable Protection: 3 mil thickness resists punctures and tears
- Flexible & Conformable: Low density material stretches to fit irregular shapes
- Cost-Effective: Wholesale pricing with fast shipping from Prism Pak
Browse our full selection below or contact us for custom sizes and volume pricing.
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What Are 3 Mil Low Density Flat Bags?
3 mil low density polyethylene (LDPE) flat bags are flexible, general-purpose poly bags manufactured at 3 mil (0.003 inch) thickness. Unlike gusseted or zipper bags, flat poly bags have a simple open-top design—ideal for quick packaging, storage, and protection.
Common Applications
Food Service & Retail:
- Bakery items (bread, rolls, cookies)
- Candy, nuts, dried fruit packaging
- Deli meats and cheese (food-grade material)
- Produce packaging for farmers markets
Industrial & Warehouse:
- Small parts storage and organization
- Protective covers for tools and equipment
- Inventory bagging for e-commerce fulfillment
- Component packaging for manufacturing
LK Packaging (formerly Elkay Plastics) Quality
LK Packaging, formerly Elkay Plastics, is a trusted name in flexible packaging with over 60 years of manufacturing experience. Their 3 mil LDPE bags are:
- Consistent thickness: Uniform 3 mil gauge throughout the bag
- FDA compliant: Safe for direct food contact applications
- Made in USA: Quality manufacturing with reliable lead times
- Clear finish: Transparent material for easy product visibility
How to Choose the Right Size
Measure your product at its widest/tallest points, then add 1-2 inches for easy insertion:
| Product Type |
Recommended Bag Size |
| Standard bread loaf |
6" x 3" x 15" |
| Small hardware parts |
4" x 6" or 6" x 9" |
| Clothing (folded shirt) |
9" x 12" or 10" x 13" |
| Books, documents |
9" x 12" or 12" x 15" |
3 Mil vs. Other Thicknesses
Not sure if 3 mil is right for your application?
- 1-2 mil: Lightweight applications (dry goods, light parts) - more economical
- 3 mil: Standard duty - balances protection and cost (this category)
- 4-6 mil: Heavy-duty applications (sharp objects, long-term storage)
See our 6 mil low density flat bags for heavier-duty work, or browse all flat and gusseted poly bags for other thicknesses and styles.
Wholesale Pricing & Fast Shipping
Prism Pak stocks LK Packaging 3 mil flat bags in popular sizes for immediate shipment. As a wholesale distributor, we offer:
- Volume discounts: Best pricing on case quantities and larger orders
- Same-day shipping: Orders placed by 2 PM EST ship same business day
- No minimums: Buy a single case or full pallets
- Custom options: Need custom sizes or printing? Contact us for a quote
Related Products
Customers ordering 3 mil LDPE flat bags also frequently purchase:
Frequently Asked Questions
What is a 3 mil low density flat bag?A 3 mil low density flat bag is an open-top polyethylene bag made at 3 mil (0.003 inch) wall thickness with no zipper, gusset, or side folds. The LDPE film is flexible enough to stretch around irregular shapes, and the flat, open-top construction makes the bags fast to fill by hand or on a bagging line. Are 3 mil LDPE flat bags food safe?Yes. LK Packaging 3 mil LDPE flat bags are FDA-compliant and safe for direct food contact, meeting FDA CFR Title 21 requirements for food packaging. They are used for bakery items, candy, nuts, dried fruit, deli meats, cheese, and farmers-market produce. How does 3 mil compare to 2 mil and 6 mil flat bags?3 mil is the standard-duty middle choice. 1 to 2 mil bags cost less and are fine for dry goods and light parts; 3 mil balances puncture resistance against cost for everyday food service and warehouse use; and 4 to 6 mil bags are better for sharp-edged items and long-term storage. Can you heat seal 3 mil poly bags?Yes. LDPE film seals cleanly with an impulse heat sealer, and a 5 to 8 inch sealer handles most bag sizes in this category. Twist ties, tape, or a clip work as well when a permanent seal is not required. What is the difference between LDPE and HDPE bags?LDPE (low density polyethylene) is more flexible and stretchy, so it conforms to irregular shapes and stays pliable. HDPE (high density polyethylene) is stiffer and crinkles more, and is typically used for grocery-style bags and trash can liners. Do you offer custom sizes or custom printing on 3 mil flat bags?Yes. Custom sizes are quoted on request, and custom printing with your logo is available on orders of 10,000 bags or more. Contact Prism Pak at (570) 709-0366 for artwork requirements and pricing. How long do polyethylene bags last in storage?Stored cool, dry, and away from UV light, polyethylene bags stay usable for years. We recommend using them within 2 to 3 years for the best clarity and film strength. Need help choosing the right bag? Call us at (570) 709-0366 or contact us online. Our packaging experts are here to help.
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