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Introduction to Square Bottom Open-Mouth Bags
Date：
2024-5-18
1.Key Features
(1) Square Bottom Design
Achieved through folding or heat-pressing, creating a flat and square base for stable free-standing placement and secure stacking.
High load-bearing capacity, suitable for 25kg–50kg materials (e.g., cement, animal feed, chemical raw materials).
(2) Open Mouth Design
Fully open bag mouth facilitates manual or mechanical filling, especially ideal for materials with poor flowability.
Post-filling closure options include sewing, heat sealing, strapping, or self-sealing strips.
(3) Optional Add-ons
Gusseted Sides: Foldable design allows empty bags to be flattened for space-saving storage.
Handles/Hand Holes: Easy carrying (e.g., pet food bags, construction material packaging).
Inner Liner: PE/aluminum foil coating for enhanced moisture/leak-proofing.
2.Common Materials
|
Material Type |
Characteristics |
Typical Applications |
|
Multi-layer Kraft Paper |
Eco-friendly, low-cost, PE-coated for moisture resistance |
Cement, feed, flour |
|
PP/PE Woven Fabric |
High strength, abrasion-resistant, reusable |
Fertilizer, mineral powder, building materials |
|
Non-woven Fabric |
Breathable, eco-friendly, short-term use |
Agricultural seeds, temporary storage |
|
Composite Film (e.g., PET/AL/PE) |
Moisture-proof, light-blocking, airtight |
Food, pharmaceuticals, chemical raw materials |
3.Production Process
Material Cutting → 2. Tubular Formation (side sealing/sewing) → 3. Square Bottom Folding → 4. Corner Reinforcement (heat sealing/gluing) → 5. Printing/Labeling → 6. Packaging & Storage
4.Primary Applications
4.1.Construction: Cement, gypsum powder, dry mortar
4.2.Agriculture/Feed: Fertilizer, seeds, pet food
4.3.Chemical Industry: Plastic pellets, mineral powder, coatings
4.4.Food Industry: Flour, sugar, salt, snacks
4.5.Environmental Protection: Biodegradable waste collection, recycled material packaging
NEXT： END！
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