What are the application scenarios for square valve bags produced using bottom-gluing and heat-sealing processes?
Release time:
2026-02-05
Core Application Scenarios for Bottom-Glued / Heat-Sealed Square Valve Bags
Paste-bottom square valve bags
Suitable for standard moisture-proof applications without high cleanliness requirements for industrial powdered/granular materials. These are the go-to bags in the chemical and building materials industries. Leveraging their strong adaptability and low cost, they are the mainstream choice for 25-50kg standard packaging. Core applications:
Building Materials: Bulk basic building materials like cement, fly ash, mineral powder, gypsum powder, putty powder, etc.
General Chemicals: Ordinary coating powders, industrial fillers, low-grade pigments, construction adhesive powders, and other chemical materials without high sealing demands;
Light Industry: Common feedstuffs, compound fertilizers, grain pellets, and other granular materials with low moisture resistance requirements;
Suitable for all-paper valve bag packaging scenarios, small-to-medium batches, multi-specification customized packaging needs, and bulk material transportation at scale.
Heat-Sealed Square Valve Bags
Designed for fine powder/granular materials requiring high moisture resistance, leak prevention, and cleanliness. Leveraging superior sealing, moisture barrier, and residue-free properties, core applications include:
Fine Chemicals: Moisture-sensitive, dust-prone fine powders like silica, titanium dioxide, talc, mica, and ultrafine calcium carbonate;
Food/Pharmaceutical Excipients: Food additives, edible starch, protein powders, and other materials demanding strict cleanliness and residue-free packaging;
Plastics & Rubber: Engineering plastic pellets, modified powders, rubber additives, and other polymer materials prone to moisture absorption and caking;
Cross-Border Export Materials: Industrial goods requiring long-distance maritime transport in high-humidity environments, plus export scenarios to regions like Europe and America with stringent environmental and packaging integrity requirements;
Paper-plastic composite / PE-laminated valve bags for scenarios requiring enhanced packaging weather resistance and tear strength.
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