Heavy Duty PE Square Bottom Bag

• Specially designed heavy duty sacks and bags
• Puncture resistant film
• Stronger film reduces packaging waste
• Can be designed for use on automated sealers or bag neck sealers
• Can be heat sealed or stitched
• Available with block bottom technology
• Available in a wide variety of colours
• 100% recyclable

Standard Size of Heavy Duty PE Square Bottom Bag (L×W×H, mm)

Thickness-Load Correlation

Specially designed heavy-duty sacks and bags. Rejecting the shortcomings of generic packaging! The Heavy Duty PE Square Bottom Bag offers customized heavy-duty solutions for different industries: chemical materials with impermeable coatings (compliant with GB/T 19787-2005), construction aggregates with reinforced load-bearing structures (compatible with JB/T 13024.1-2017), and food-grade FDA-certified virgin PE (21 CFR 177.1520). Precisely matching mainstream needs of 25-50kg, saving costs and demonstrating professionalism, gaining trust from international buyers.

Puncture resistant film. Made of HDPE + metallocene PE blend, with a puncture strength exceeding 80N tested by ASTM D5748, it is puncture-resistant to sharp materials (rubber additives, catalysts). Leak-proof for transporting materials such as carbon black and aggregates, perfectly suited for international pallet stacking and mechanical loading/unloading scenarios. International manufacturers such as Interplas are using this solution.

Stronger film reduces packaging waste. Elongation at break 300%+ (GB/T 1040.3-2006 Superior Grade Standard), breakage rate as low as 0.1% (Flexipol actual test). Only 5 out of 5000 bags leak. At $2/kg raw material, this saves hundreds of dollars per batch. Less waste and more environmentally friendly, fully compliant with EU REACH regulations.

Can be designed for use on automated sealers or bag neck sealers. ±2mm high-precision heat-sealing edge, directly compatible with Krones and Bosch automated sealing machines. Manual sealing takes 15 seconds per bag; automation achieves 15-20 bags per minute, tripling daily output. Essential for large-scale production in international factories, saving labor and ensuring stable production.

Can be heat-sealed or stitched. Offers flexible options for both heat sealing and stitching: Pulse heat sealing strength 15N/15mm (QB/T 2358-2018), ensuring moisture and leak protection and keeping materials fresh; double-stitched polyester thread with reinforced buckles, easily handles 50kg+ loads. Both methods meet ISTA 3A transport standards, ensuring reliable sea and land transport.

Available with block bottom technology. ASTM D6425 standard square bottom design allows the bag to stand upright without support. Filling accuracy ±0.5%, saving 40% of storage space (Clearbags data), with a smooth printing surface for clear information. Ideal for regions with high overseas warehousing costs, making inventory management incredibly easy.

Available in a wide variety of colors. Choose from transparent, black, white, blue, and other basic colors; brand VI customization supported. Masterbatch process ensures no color difference; color fastness level 4+ (GB/T 14576-2009), colorfast under sunlight. Green label for agricultural supplies, blue label for food-grade products, and red/yellow grading for chemicals ensure greater safety; the ICSC-recommended classification method is highly practical.

100% Recyclable Made of pure PE material, 100% recyclable (compliant with EU EN 13432 and US EPA 40 CFR Part 261), with a recycling rate of 95%+ (APR data). Easily meets the EU's 2030 50% recycling requirement; major manufacturers like BASF prioritize this type of environmentally friendly packaging, giving the Heavy Duty PE Square Bottom Bag a significant international competitive advantage.

Flexographic Printing: Utilizes high-precision flexographic printing technology, ensuring high color fidelity and sharp image edges, meeting the printing needs of various information such as brand logos and product parameters.

High-Quality Print in Up to 8 Colors: Achieves high-quality printing with up to 8 colors, producing rich and vibrant colors to quickly attract attention on the shelf.

Inner/Outer Colors: Supports different colors for the inner and outer layers of the bag. The outer layer can highlight the brand image, while the inner layer can accommodate special needs such as light protection for materials, balancing aesthetics and practicality.

Film Colors: Offers a variety of film colors including transparent, solid colors, and matte finishes, precisely matching the usage scenarios of different industries such as food, chemical, and agriculture.

UV Inhibitors: Contains professional UV inhibitors to effectively block the erosion of ultraviolet rays in sunlight, extending the shelf life of outdoor stored materials and the lifespan of the packaging. Ripp 'n' Flow technology: The unique Ripp 'n' Flow easy-tear design allows for easy opening without tools, preventing splashing of materials during pouring and improving ease of use and safety.

Surface treatments: Special surface treatments enhance bag adhesion, ensuring ink doesn't easily peel off, labels and tape adhere firmly, and packaging integrity is maintained during long-term transportation.

Block bottom style sacks: The classic block bottom bag structure provides stable self-support, eliminating the need for additional support during filling, resulting in neater stacking and significantly reducing material residue and transportation losses.

30% recycled content: Up to 30% recycled materials can be added without affecting the packaging's load-bearing capacity and leak-proof performance, meeting environmental procurement requirements and reducing procurement costs.

Emboss and emboss stripes: The embossed and striped design on the bag surface increases friction during stacking, effectively reducing the risk of slippage during pallet transportation.

Perforations: The pre-designed perforations on the bag allow for quick expulsion of internal air, preventing the bag from expanding and deforming during filling and stacking, resulting in a more compact stack and saving storage space.

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