Premium Full-Color Print Square Bottom Valve Bag | Flagship Packaging for Gypsum Powder | Glossy Lamination & Enhanced Moisture Protection

Applicable to: Building Gypsum Powder / High-Strength Gypsum Powder / Model Gypsum Powder / Joint-Filling Gypsum / Plastering Gypsum / Premium Putty Powder

Product positioning: 
This product is a flagship-grade packaging bag for gypsum powder brands, specifically designed for mid- to high-end gypsum powder companies that prioritize brand image, product quality, and filling efficiency. It features a glossy laminated finish and full-color, high-precision printing for a mirror-like, lustrous texture; a square-bottom valve design that is perfectly compatible with automated high-speed filling lines; and an enhanced moisture-proof configuration to ensure stable performance of the gypsum powder in humid environments and during long-term storage.

Core Advantages:

High-precision full-color printing 
Utilizing high-precision intaglio printing at 150 lines per inch, the gradient color transitions are natural and seamless, while small-type fonts and intricate patterns feature crisp, sharp edges—free of blurring or broken lines.

Glossy laminate protection 
The surface is coated with a high-gloss PE film, ensuring that the printed design is abrasion-resistant and fade-proof, maintaining a like-new appearance throughout handling, stacking, and transportation. The laminated layer also provides basic water- and dust-proof performance.

Moisture-Resistant Upgraded Configuration 
Optional thickened PE inner liner or aluminum foil barrier layer is available, achieving a water vapor barrier rate of over 98% and effectively preventing gypsum powder from absorbing moisture, caking, and losing efficacy due to hardening.

For automated filling only 
The square-bottom valve-mouth design is specifically engineered for high-speed valve-mouth filling machines, achieving a filling rate of 6 to 10 seconds per bag. After filling, the valve mouth automatically seals, eliminating the need for manual sealing.

Dustproof and leak-proof design 
During valve-mouth filling, dust spillage is minimal, significantly improving the workshop’s working environment. The heat-sealed bottom process eliminates pinholes and gaps, ensuring no powder leakage or dust generation during transportation.

Material and Craftsmanship: 
The outer layer is constructed from PP polypropylene woven fabric, providing excellent tensile strength and puncture resistance. The surface features full-color gravure printing with a resolution of 150 lines per inch. A glossy PE film lamination delivers a mirror-like sheen. The inner layer can be optionally equipped with a thickened PE liner or an aluminum foil barrier layer. The bag style is a square-bottom valve pouch with a three-dimensional, square-shaped bottom. The valve opening is a cuff-style design, ranging in length from 80 to 120 millimeters, with the diameter customized to match the discharge nozzle of the customer’s filling machine. The bottom is sealed using heat-sealing technology, ensuring a pinhole-free, fully airtight seal.

Tensile strength: 
Testing has confirmed that the tensile strength exceeds 700 newtons per 50 millimeters, enabling it to support 25 to 40 kilograms of plaster powder.

Moisture-proof rating: 
Standard glossy laminated packaging offers a water vapor barrier rate of no less than 90%, suitable for conventional storage environments with a shelf life of 6 months. When equipped with an optional thickened PE inner liner, the water vapor barrier rate increases to no less than 95%, making it ideal for storage in humid regions and extending the shelf life to 12 months. With the addition of an aluminum foil barrier layer, the water vapor barrier rate reaches at least 98%, rendering the packaging suitable for export by sea and long-term storage, with a shelf life of 18 months or more.

Packaging drop test: 
Under a 40 kg load condition, the product underwent a 1.2-meter free-fall test and remained intact—showing no cracks or material leakage after being dropped on all six sides.

Applicable filling method: 
Compatible with various high-speed valve-fill equipment, including impeller-type valve fillers, screw-type valve fillers, and pneumatic valve fillers.

Packaging specifications: 
The bagging weight can be customized to either 25 kg or 40 kg. For the 25-kg specification, the recommended bag dimensions are: length 500 mm, width 400 mm, and bottom width 120 mm. For the 40-kg specification, the recommended bag dimensions are: length 600 mm, width 450 mm, and bottom width 130 mm. The valve opening length ranges from 80 to 120 mm, with the diameter tailored to match the discharge nozzle of the filling machine. The bag style is a square-bottom valve bag.

Customization Scope: 
Dimensions can be customized based on the weight of the material to be packaged and customer requirements, including length, width, and bottom width. Valve port specifications can be tailored to match the length and diameter of the filling machine’s discharge nozzle. Full-color printing can be customized according to the customer’s brand identity system, with bespoke graphics, colors, and text. Moisture-proof performance can be enhanced through options such as standard lamination, a thickened PE inner liner, or an aluminum foil barrier layer. The bottom can be either heat-sealed or sewn with a sealing strip. Optional features include UN-certified hazardous-material packaging for export.

Environmental Compliance: 
The product is manufactured using virgin PP material and is recyclable. We can provide UN-certified hazardous-goods packaging for export, ensuring compliance with international regulations for the packaging of dangerous goods in maritime and air transport.

Price and Minimum Order Quantity: 
Specific pricing and minimum order quantities are negotiable. Please feel free to call or write for a quotation.

Applicable to: 
This product is suitable for manufacturers of architectural gypsum powder brands, high-strength gypsum powder producers, model-making gypsum powder manufacturers, joint-filling and plastering gypsum producers, high-end putty powder companies, and building-materials export traders.