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 (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 full poly bag selection 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
Are these bags food safe?
Yes, LK Packaging 3 mil LDPE bags are FDA-compliant and safe for direct food contact. They meet FDA CFR Title 21 regulations for food packaging.
Can I heat seal these bags?
Absolutely. LDPE material seals easily with an impulse heat sealer. We recommend a 5-8 inch sealer for most bag sizes.
What's the difference between LDPE and HDPE bags?
LDPE (low density) is more flexible and stretchy—better for irregular shapes. HDPE (high density) is stiffer and crinkles more, often used for grocery bags.
Do you offer custom printing?
Yes! For orders of 10,000+ bags, we can arrange custom printing with your logo. Contact our sales team for details and pricing.
What's the shelf life?
When stored properly (cool, dry, away from UV light), polyethylene bags remain usable for years. We recommend using within 2-3 years for optimal clarity.
Need help choosing the right bag? Call us at 1-800-381-3312 or send us a message. Our packaging experts are here to help.
|
