FFS PE Valve Bag

Enhanced Protective Performance of PE Materials

Moisture resistance and corrosion resistance: FFS PE valve bag use a composite film of HDPE (high-density polyethylene) and LLDPE (linear low-density polyethylene). The water vapor transmission rate is ≤2g/(m²・24h). Even in acidic or alkaline environments, the strength retention rate remains ≥90% after soaking in solutions with pH 2-12 for 72 hours. This makes them suitable for corrosive powders like cement and chemical fertilizers.

Puncture and impact resistance: By adding 5%-10% metallocene PE (mPE), the puncture strength is increased by 35% to 25N. They pass the drop test from a height of 1.5m without breaking, making them ideal for granular materials such as plastic pellets and quartz sand.

Automated Adaptability of Valve Structures

Self-sealing valve design: The standard round valve has a diameter of 50-100mm, compatible with screw conveyors and pneumatic feeding equipment. The filling speed is ≥80kg/min, which is 40% more efficient than traditional open-mouth bags.

When folded, the valve locks automatically. In airtightness tests under 2kPa pressure, the leakage rate is ≤50ml/min. This reduces dust emission by 90%, meeting OSHA dust control standards.

Anti-backflow design: A one-way flap inside the valve prevents external air from entering the bag during unloading. This avoids powder caking, making it suitable for hygroscopic materials like flour and milk powder.

Production Efficiency Breakthroughs with FFS Technology

Bags are made and filled directly from roll film, reducing production costs by 30% compared to pre-made valve bags. For 10kg,the cost per bag is 0.8-1.5 yuan. Warehouse and logistics costs are also cut by 50% as there's no need to stock pre-made bags.

Adaptable to high-speed production lines: The integrated process of bag-making, filling, and sealing operates at 40-60 bags per minute, supporting 24-hour continuous production with an equipment failure rate of ≤0.5 times per 1,000 bags.

1. Regular Sizes and Capacities (for 10kg-50kg powder packaging)

The 10kg standard bag has dimensions of 400×250×600mm, a valve diameter of 50mm, material thickness of 80-100μm, and a load range of 10-15kg.

The 25kg general-purpose bag measures 550×350×800mm, with a 75mm valve diameter, 100-120μm thickness, and a load range of 20-30kg.

The 50kg large-size bag is 700×450×1000mm, featuring a 100mm valve, 120-150μm thickness, and a load range of 40-50kg.

The 1000kg bulk bag (ton bag) has dimensions of 1000×1000×1200mm, a top filling port of 150mm, thickness of 200-250μm, and a load range of 800-1000kg.

2. Structural and Performance Customization Parameters

Valve positions can be customized: top center valve (suitable for upper feeding), bottom eccentric valve (suitable for gravity unloading), or side valve (adapting to special equipment).

Material composite structures include single-layer PE, which is cost-effective for short-term storage (≤3 months) with a thickness of 60-80μm. Three-layer composite (PE + barrier layer + PE) offers an oxygen transmission rate of ≤10cm³/(m²・24h), ideal for oxidation-prone powders like milk powder and coffee powder.

Printing and labeling support 8-color gravure printing with a resolution of ≥300dpi, capable of printing barcodes and dangerous goods marks (such as UN certification logos).

In the building materials industry, for 25kg-50kg cement or lime packaging, choose 120μm thick HDPE valve bags with dust-proof caps on the valves to prevent powder leakage during transportation. They can be printed with brand logos and weight marks.

In the chemical industry, for lithium battery cathode materials (such as lithium iron phosphate), select anti-static types with a surface resistance of ≤10⁸Ω. These should be used with vacuum filling processes to avoid dust explosions.

In the food industry, food-grade FFS PE Square Bottom Valve Bags are used for flour and starch. The inner side of the valve is fitted with a food-grade silicone sealing ring to meet SC certification. Transparent windows can be customized to observe the material status.

In the agricultural field, degradable PE valve bags are used for organic fertilizers and feeds. Adding photosensitizers ensures a degradation rate of ≥70% after 6 months of outdoor stacking, reducing white pollution.

In terms of production costs, FFS PE valve bag are 20%-35% lower due to the FFS process reducing labor and storage expenses, whereas traditional pre-made valve bags have higher costs from pre-manufacturing, transportation, and storage.

Filling efficiency is higher with FFS PE valve bags at 40-60 bags per minute, compared to 20-30 bags per minute for traditional ones, which require manual bag loading.

Sealing performance is superior in FFS PE Square Bottom Valve Bags, with the self-locking valve resulting in a leakage rate of ≤0.5%, while traditional bags rely on manual sealing with a leakage rate of 5%-10%.

Customization flexibility is greater with FFS PE valve bags, allowing quick mold changes (within 15 minutes) and supporting small-batch customization. Traditional pre-made valve bags have high minimum order quantities (≥100,000 pieces) and longer customization cycles.

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