18x20 Heavy-Duty 4 Mil Flat Poly Bags - Industrial-Grade Protection
These 18x20 flat poly bags deliver serious puncture resistance with 4 mil thickness, making them ideal for heavy parts, sharp-edged components, and equipment requiring robust protection. Manufactured by LK Packaging from virgin LDPE, these bags provide reliable containment for industrial operations where lighter-gauge bags would tear or puncture.
Product Specifications
- Dimensions: 18" x 20" flat (open end)
- Thickness: 4 mil (.004") - Heavy Duty
- Material: Low Density Polyethylene (LDPE)
- Quantity: 250 bags per case
- Color: Crystal clear
- Manufacturer: LK Packaging (Elkay Plastics)
- Compliance: FDA compliant for food contact applications
Industrial Applications
The 4 mil thickness makes these bags the go-to choice for applications where standard 2 mil bags would fail. Manufacturing facilities use them for packaging machined parts with sharp edges, burrs, or pointed corners. Automotive and aerospace operations rely on this gauge for fasteners, brackets, and metal components that would puncture lighter materials. Equipment maintenance teams store replacement parts, tooling, and hardware with confidence that the bags won't tear during handling or storage.
Beyond industrial parts, the generous 18x20 dimensions accommodate bulky items like small equipment covers, large textile samples, oversized documents, and assembled kits. Warehouse operations use these bags for inventory protection, dust covers, and weather-resistant temporary storage.
Key Features
- Puncture Resistant: 4 mil thickness withstands sharp edges, rough handling, and industrial environments
- Crystal Clear: Easy visual inspection and inventory identification without opening
- Seamless Tubing: No side seals or slits that can rip under stress - made from continuous tubing
- Virgin LDPE: Premium material ensures consistent quality and FDA compliance
- Flexible Yet Strong: LDPE provides excellent tear resistance while remaining pliable for easy loading
Thickness Guide
Selecting the right mil thickness prevents packaging failures and product damage:
- 1-1.5 mil: Light duty - dust covers, temporary protection
- 2 mil: Standard - general merchandise, soft goods
- 3 mil: Medium duty - parts with some edges, moderate handling
- 4 mil: Heavy duty - sharp parts, industrial components, rough handling (this product)
- 6 mil: Extra heavy duty - extreme applications, very sharp objects
Why LK Packaging
LK Packaging (Elkay Plastics) manufactures premium polyethylene bags from virgin materials with rigorous quality control. Their seamless tubing construction eliminates weak points found in bags made with side seals, delivering superior reliability for demanding industrial applications.
Why Choose Prism Pak
Prism Pak provides wholesale pricing on LK Packaging products with knowledgeable service from our Berwick, PA team. We stock popular sizes for quick shipment to commercial customers throughout the region.
