Block bottom valve bags are a common type of industrial packaging bag, named for their unique square bottom design and valve structure. They combine the stability of square-bottom bags with the efficient sealing of valve filling, making them widely used in the packaging of powdered and granular materials across various industries. Below are their main application areas and characteristics:

1. Construction Materials Industry
Cement, lime, gypsum powder: Square-bottom valve bags are the mainstream choice for cement packaging due to their high load-bearing capacity (typically able to hold 25-50 kg) and cement bag 50kg moisture resistance (such as laminated woven bags), making them suitable for long-distance transportation and stacking.

Dry-mixed mortar, tile adhesive: The valve design prevents dust leakage, ensuring that materials remain clean during filling and handling.

2. Chemical Industry
Fertilizers, animal feed, plastic pellets: The adstar bags are made from polypropylene (PP) or polyethylene (PE) woven materials, which are corrosion-resistant and moisture-proof, making them suitable for the storage of fertilizers and chemical raw materials.

Powder coatings, pigments: Valve bag filling reduces dust generation, protects worker health, and prevents material contamination.

3. Food Industry
Flour, starch, powdered sugar: Food-grade liners (such as PE film) ensure hygiene and safety, while the valve mouth sealing design prevents moisture or foreign objects from entering.

Pet food, additives: Suitable for automated production lines, allowing for quick filling and heat sealing of the valve mouth, thereby improving efficiency.

4. Mining and Metallurgy Industry
Mineral powder, metal powder, quartz sand: High-strength woven bags can withstand the friction of sharp particles, and the valve design reduces material waste during filling.

5. Environmental Protection and Recycling Industry
Waste recycling, biomass pellets: environmentally friendly materials that can be reused or recycled (such as biodegradable plastics), in line with the trend of green packaging.

cement bag manufacturers ：

Hebei Shengshi jintang Packaging Co., ltd established in 2017,It is our new factory ,occupies over 200,000 square meters.

our old factory named shijiazhuang boda plastic chemical co.,ltd -occupies 50,000 square meters.

we are bag making factory,helping our clients to get perfect pp woven bags.

our products include: pp woven printed bags,BOPP laminated bags,Block bottom valve bags,Jumbo bags.