Lay Flat Poly Bag Selection Guide
How to Choose the Right Gauge
Understanding mil thickness for your application:
- 1 mil: Lightweight items, temporary storage, cost-sensitive applications (apparel, lightweight parts)
- 1.5 mil: Light-duty packaging with better puncture resistance (small parts, dry goods)
- 2 mil: Standard duty for most commercial applications (hardware, food products, general merchandise)
- 3 mil: Medium-duty protection for heavier items (automotive parts, tools, industrial components)
- 4 mil: Heavy-duty applications requiring superior puncture resistance (sharp objects, heavy hardware)
- 6 mil: Extra heavy-duty for demanding environments (construction, outdoor storage, long-term protection)
Common Size Applications
Small sizes (2x3" to 6x9"):
- Electronic components and small parts organization
- Jewelry, craft supplies, and sample packaging
- Fasteners, screws, and hardware kits
- Pharmaceutical and medical device components
Medium sizes (8x10" to 18x24"):
- Apparel and textile packaging
- Food products (bulk foods, baked goods with FDA compliance)
- Documents, catalogs, and printed materials
- Industrial parts and component protection
Large sizes (24x30" to 48x60"):
- Bulk industrial packaging and pallet covers
- Large equipment parts and automotive components
- Construction materials and building supplies
- Agricultural products and bulk storage
FDA Compliance for Food Contact
Food-Safe Packaging Requirements
All lay flat poly bags manufactured from virgin LDPE meet FDA 21 CFR 177.1520 for direct food contact. Critical for commercial food operations:
- Virgin resin only: No recycled content ensures purity and safety
- USDA accepted: Compliant for federally inspected meat and poultry plants
- Migration testing: Materials tested for food contact safety
- Documentation: Compliance certificates available for audit requirements
- Applications: Bakery products, dry foods, bulk ingredients, prepared foods, produce
Important: While bags are FDA compliant for food contact, choose appropriate gauge for product weight and handling requirements. Food applications typically use 1.5-3 mil depending on product density and shelf life.
Closure Methods and Sealing
How to Seal Lay Flat Poly Bags
Heat sealing (recommended for production environments):
- Impulse sealers for LDPE film (adjustable temperature and dwell time)
- Creates tamper-evident, air-tight seal for product protection
- Available in hand-held, tabletop, and industrial conveyor models
- Seal times: 0.5-2 seconds depending on gauge thickness
- Professional presentation for retail and food packaging
Alternative closure methods:
- Twist ties: Quick, reusable closure for bakery, produce, and parts packaging
- Bag tape: Permanent adhesive closure for shipping and storage
- Staples: Industrial closure for non-food applications (not recommended for FDA compliance)
- Zip ties: Secure closure for heavy-duty industrial applications
Material Properties and Performance
LDPE Film Characteristics
Why LDPE (Low-Density Polyethylene) for lay flat bags:
- Clarity: High transparency for product visibility and retail presentation
- Flexibility: Conforms to product shape without cracking or tearing
- Puncture resistance: Tough film resists sharp edges and rough handling
- Chemical resistance: Protects against moisture, oils, and mild chemicals
- Temperature range: Performs from freezer storage (-50°F) to warm warehouses (140°F)
- Recyclable: LDPE film is recyclable (#4 plastic) through commercial recycling programs
Performance vs. Other Bag Styles
Lay flat vs. gusseted bags:
- Lay flat: Better for flat items, retail display, space-efficient storage when empty
- Gusseted: Better for bulky items, stand-up presentation, irregular shapes
Lay flat vs. zip lock bags:
- Lay flat: Lower cost, faster filling in production, heat-sealable for tamper evidence
- Zip lock: Resealable for repeated access, better for consumer retail applications
Wholesale Pricing and Ordering
Volume Pricing Structure
Wholesale pricing tiers:
- Direct manufacturer pricing eliminates distributor markup
- Volume discounts increase with case quantities
- Mix-and-match sizes/gauges within orders to reach volume tiers
- Contract pricing available for ongoing high-volume requirements
- Pennsylvania manufacturing ensures reliable supply and consistent quality
Custom Capabilities
Beyond Stock Offerings
Custom solutions available for specialized requirements:
- Custom sizes: Non-standard dimensions for specific product fit (minimum quantities apply)
- Custom printing: Company logos, product information, handling instructions
- Special formulations: Anti-static, UV-stabilized, colored films
- Lead times: Competitive turnaround on special orders
- Engineering support: Application-specific bag design and optimization
Technical Support and Ordering
Expert packaging guidance for commercial operations:
- Gauge selection assistance for specific application requirements
- Size optimization for product fit and cost efficiency
- Closure method recommendations for production environments
- FDA compliance documentation for food safety audits
- Volume pricing for contract manufacturing and ongoing needs
- Sample programs for application testing before full case purchase
Contact packaging specialists: 800-569-1266 (M-F 8:30-5 EST)
Explore gauge options below: Click on the gauge category that best matches your application requirements for complete size selection and pricing.
