4x4 Pre-Opened Poly Bags on Roll - Auto-Style for Automated Packaging
These 4" x 4" pre-opened poly bags on roll are engineered for high-speed automated packaging equipment and fast manual loading operations. Manufactured from 100% virgin Low Density Polyethylene (LDPE) resin, these 3 mil bags feature a pre-opened slit in the front and perforated back for efficient product insertion. Each roll contains 2,000 bags neatly wound on 3-inch cores, compatible with most automated bagging machines and manual dispensers.
Product Specifications
- Dimensions: 4" x 4" (width x length)
- Material: 100% virgin LDPE (Low Density Polyethylene)
- Thickness: 3 mil (0.003")
- Quantity: 2,000 bags per roll
- Core Size: 3-inch diameter cores
- Style: Pre-opened with slit front and perforated back
- Compliance: FDA/USDA compliant for food contact
- Clarity: Clear film for product visibility
Industrial Applications
Automated Packaging Lines: Designed specifically for use with automated bagging equipment, these pre-opened bags significantly increase packaging throughput on production lines. The slit front design allows mechanical arms or vacuum systems to easily open the bag, while the perforated back ensures proper separation between bags during high-speed operations.
Manufacturing and Assembly: Ideal for packaging small hardware, electronic components, fasteners, O-rings, washers, and industrial parts. The 3 mil thickness provides puncture resistance for items with edges or points, while maintaining product visibility through the clear LDPE film.
Food Service and Bakery: FDA/USDA compliant for direct food contact applications including cookies, candy, baked goods, nuts, and confections. The pre-opened design accelerates hand-packaging operations in commercial bakeries and food production facilities.
Retail and E-commerce Fulfillment: Efficient for packaging small retail items, jewelry, cosmetic samples, craft supplies, and accessories. The roll format allows for compact storage and easy dispensing at packing stations.
Key Features and Benefits
- Pre-Opened Design: Slit front eliminates the need to manually open each bag, reducing labor time by up to 50% compared to standard flat bags
- Perforated Back: Clean separation between bags ensures smooth feeding through automated equipment without jamming or double-feeds
- 3 Mil Heavy Duty: Heavier gauge provides superior strength and puncture resistance for industrial parts and sharp-edged products
- Virgin LDPE Resin: Consistent clarity, strength, and compliance — no recycled materials that could compromise performance or food safety
- FDA/USDA Compliant: Certified safe for direct contact with food products, meeting federal specifications for food packaging applications
- Standard 3" Cores: Compatible with most automated bagging machines and manual bag dispensers for easy integration into existing workflows
- High Bag Count: 2,000 bags per roll reduces changeover frequency and downtime on production lines
Technical Considerations
Storage: Store rolls in a cool, dry location away from direct sunlight. LDPE bags should be kept at temperatures below 100°F to prevent film distortion. Proper storage ensures bags maintain their pre-opened configuration and feed smoothly through automated equipment.
Equipment Compatibility: These bags work with most automated bagging systems including Autobag®, Minipack, and similar wicket-style and roll-fed machines. The 3-inch core is industry standard and fits most manual and automated dispensers. Contact our team if you need to verify compatibility with specific equipment models.
Material Properties: LDPE offers excellent flexibility, moisture resistance, and clarity. The 3 mil gauge balances strength with cost-efficiency — thicker than standard 1.5-2 mil bags for added durability, but not as heavy as 4-6 mil bags used for extremely sharp or heavy items.
Why Choose Prism Pak
As a direct wholesale distributor, Prism Pak offers competitive pricing on case quantities of pre-opened poly bags without the markup of large national suppliers. Our technical team can assist with bag selection for specific automated equipment and provide samples for testing on your production line.
