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.