Block bottom valve bags are designed for efficient filling, stable stacking, and reliable transportation of powdered and granular products. Compared with conventional sewn bags, their block-shaped bottom provides a more stable standing and stacking structure, while the valve opening supports fast and efficient filling. They are widely used for cement, flour, dry mix mortar, fertilizers, chemicals, pet food and other dry bulk products.
Our Popular Block Bottom Valve Bags
Our range of Block Bottom Bags offers reliable, high-performance packaging solutions tailored to the needs of
different industries. Here are some of our most popular options:
● 25KG Fertilizer Top Open Block Bottom Bags
Designed for quick and efficient filling of fertilizers and granular
products, these bags offer excellent stackability and provide protection during transport, keeping contents secure and intact.
● Block Bottom Valve Bag For Cement and
Construction Materials
Engineered for heavy-duty use, these PP valve bags and valve
sacks ensure durability, tear resistance, and reliable protection for cement, sand, and other construction materials.
● Multi-layer Composite Valve Bag for
Cement and Construction Materials
With multiple layers of high-strength materials, these bags provide superior protection against
moisture, dust, and mechanical stress, ensuring safe storage and long-distance shipping for construction materials.
Block Bottom Valve Bags vs Traditional PP Woven Bags
| Feature | Block Bottom Valve Bags | Traditional PP Woven Bags |
| Bag Shape | Square / Block Bottom | Flexible |
| Stacking | Excellent | Good |
| Pallet Stability | Excellent | Moderate |
| Filling | Valve Filling | Open-mouth Filling |
| Automation | Excellent | Depends on design |
| Warehouse Efficiency | High | Moderate |
| Product Presentation | Better | Standard |
| Best For | Powders & Granules | General Bulk Packaging |
Need efficient automated filling and stable pallet stacking? Block bottom valve bags may be the better choice.
Why Choose Our Block Bottom Bags?
Efficient Filling
The valve opening allows powders and granules to be introduced through compatible filling nozzles, making the bag suitable for automated or high-volume industrial packaging lines.
Stable Pallet Shape
After filling, the block bottom construction forms a more rectangular package than many conventional woven sacks.
This helps improve:
● Pallet arrangement
● Warehouse space utilization
● Stacking stability
● Transportation efficiency
● Package presentation
Strong Woven PP Construction
Woven polypropylene provides good tensile and handling strength for products that experience repeated movement during filling, stacking, loading and transportation.
Reduced Product Leakage
For fine powders, the bag structure can be configured with coating and controlled air-release features to balance filling speed with product containment.
Custom Industrial Packaging
Valve dimensions, fabric strength, bag size and other structural elements can be developed according to the packed material and filling equipment.
Industries We Serve
Charcoal
Our Block Bottom
Bags and PP valve bags provide sturdy, moisture-resistant packaging for charcoal. These bags prevent breakage, reduce dust loss, and
ensure safe handling and transport.
Stock Feed & Animal Food
Designed for durability and convenience,
our valve sacks keep animal feed fresh, prevent contamination, and are easy to stack and handle in farms, warehouses, and distribution
centers.
Fertilizers
& Plant Nutrition
Our 25KG Fertilizer Top Open Block Bottom Bags and inner coated bags offer excellent moisture resistance, protecting fertilizers
and plant nutrients during storage and transportation.
Food Items, Grains & Seeds
Using block bottom paper
bags and multi-layer composite valve bags, we provide hygienic, safe packaging for food products, grains, and seeds. These bags maintain
freshness, prevent spillage, and simplify storage and shipping.
| Product | Why Use Block Bottom Valve Bags |
| Cement | Strong structure and stable stacking |
| Dry Mix Mortar | Efficient filling and transportation |
| Flour | Suitable for automated filling |
| Fertilizer | Durable and customizable |
| Chemicals | Secure packaging for dry powders |
| Pet Food | Clean and stable packaging |
| Animal Feed | High strength and easy handling |
| Starch | Suitable for powdered products |
| Sugar | Stable palletization |
| Minerals | Heavy-duty packaging |
Why Choose Shengshi Jintang as Block Bottom Valve Bags Manufacturer
40+ Years of Manufacturing Experience
Our packaging manufacturing experience dates back to 1983.
Large-Scale Production
Our facilities cover approximately 80,000㎡, including a 50,000㎡ high-clean-standard workshop.
30,000 MT Annual Capacity
Our three factories provide large-scale production capacity for bulk packaging orders.
300 Million+ Bags per Year
We supply more than 300 million bags annually to customers in approximately 30 countries.
Integrated Manufacturing
Production covers extrusion, weaving, lamination/coating, printing and bag making, supporting better control over quality and lead times.
Strict Quality Control
The company highlights piece-by-piece inspection and a dedicated quality system.
Customization Options
Bag Size
Customized length, width and gusset according to filling weight and equipment requirements.
Material
Different PP woven fabric weights and material structures can be selected based on load requirements.
Valve Type
Valve construction can be customized to match different filling systems and product characteristics.
Printing
Custom logos, product information, barcodes, warnings and multi-color graphics are available.
Surface Finish
Options may include standard woven surfaces, coated surfaces or laminated structures depending on the application.
Bottom Construction
The block bottom structure can be configured according to filling, stacking and transportation requirements.
Inner Liner / Coating
Additional inner protection can be considered for products requiring improved moisture or containment performance.
Different products and filling systems require different bag structures. We can customize the bag construction according to your product characteristics, filling equipment and transportation requirements. Send Your Bag Specifications → Get a Customized Quote
