Our Block Bottom Polywoven Bags combine strength, stack ability, and premium visual appeal, making them ideal for fertilizer packaging, grass seeds, and industrial chemical products. Designed for high-efficiency palletizing and retail display, these square-bottom laminated sacks are widely used across the Middle East for moisture-sensitive and high-value goods.
We offer both BOPP laminated and paper poly bottom bags, with open-mouth or valve filling options to meet your production line and branding requirements.
What Are Block Bottom Polywoven Bags?
Block bottom polywoven bags (also known as square bottom woven sacks) are made from woven polypropylene fabric and feature a flat, glued base that allows the bag to stand upright. Laminated with BOPP film or kraft paper, these bags offer moisture protection, tear resistance, and full-surface branding-essential for fertilizers, grass seed, and specialty chemical products.
Unlike standard pillow-style woven bags, these bags have a rectangular base that improves:
- Filling stability
- Shelf display
- Palletization efficiency
Key Features & Benefits
● Square, Self-Standing Bottom
Glued block base ensures superior stacking and display.
● BOPP or Paper Lamination
Choose glossy/matte BOPP film or kraft paper for your desired finish.
● High-Definition Printing
Up to 10-color gravure printing-ideal for fertilizer and branded agri-products.
● Filling Options
Available with open-top or valve-type (automatic form fill seal compatibility).
● Weather & Moisture Protection
Lamination prevents water ingress, clumping, and mold growth.
What's the Difference Between Block Bottom Polywoven Bags and Sewn Woven Bags?
While both are made from woven polypropylene fabric, they differ significantly in structure, sealing method, and application suitability.
|
Feature |
Block Bottom Polywoven Bag |
Sewn Woven PP Bag |
|
Bottom Structure |
Glued block/square bottom for self-standing stability |
Flat bottom with sewn line (folded and stitched) |
|
Filling Options |
Valve-type or heat-sealed open mouth |
Typically, open-mouth sewn (single/double stitch) |
|
Moisture Protection |
Excellent seal with lamination and tight construction |
Moderate-can leak if not sealed properly |
|
Stacking Efficiency |
High-perfect cube shape for pallets |
Lower-rounded bottom creates uneven stacks |
|
Branding & Print Area |
Full 5-side printable surface (front, back, sides, bottom, top) |
2-3 side print area only |
|
Application Suitability |
Ideal for fertilizers, seeds, fine powders, chemicals |
Suitable for grains, feed, sand, general goods |
In Summary
- Block bottom bags offer a premium, sealed, and stand-up solution ideal for retail and export markets.
- Sewn woven bags are more cost-effective and traditional, commonly used in bulk agriculture and construction sectors.
Applications of Block Bottom Polywoven Bags
These laminated block bottom sacks are widely used in:
● Fertilizer Packaging
Urea, NPK blends, ammonium nitrate, organic compost
● Grass Seed & Lawn Products
Ryegrass, Bermuda, fescue, and seed mixtures
● Chemical Powders & Granules
Calcium carbonate, industrial minerals, feed additives
● Animal Feed & Pet Food
Dry cattle feed, dog food, birdseed
● Agrochemical and agricultural supply
Including micronutrients, pesticides (in powder form)
Technical Specifications
|
Feature |
Description |
|
Material |
PP woven fabric laminated with BOPP or kraft paper |
|
Bottom Type |
Glued block bottom (square base) |
|
Size Range |
5kg–50kg (custom dimensions available) |
|
Printing |
Gravure, up to 10 colors (gloss or matte finish) |
|
Filling Style |
Open mouth or valve-type for vertical form fill seal machines |
|
Closure |
Heat-sealed top or stitched with easy-open thread |
|
Optional Features |
UV coating, micro-perforation, anti-slip, PE liner, handle holes |
|
Export Code |
HS Code 630533 |
Why Choose Our Block Bottom Polywoven Bags?
● Enhanced Storage & Logistics
Square bottom allows for dense, uniform pallet stacking.
● Premium Branding Display
Ideal for retail-ready fertilizer sacks with full-coverage graphics.
● Custom-Made for Your Market
Designed specifically for the Middle East, including Saudi Arabia, UAE, Qatar, Jordan, and surrounding countries.
● Reliable Export Support
Full documentation, multi-language support, and CIF/DDU logistics available.
How to Order
1. Submit Your Bag Requirements
Share dimensions, filling style (valve/open), lamination type (BOPP/paper), and quantity.
2. Get a Quotation
Receive a fast and transparent quote with shipping terms.
3. Approve Artwork & Sample
We'll provide a digital proof and optional sample for your confirmation.
4. Production & Packing
Bags are produced under strict QC and packed flat or palletized for export.
5. Export & Delivery
Full customs-ready documentation including HS Code 630533 and Certificate of Origin.
Looking for stackable, moisture-proof fertilizer bags with superior branding?
Sino Topway manufactures block bottom polywoven bags tailored for your market.
📦 Contact us today for samples, pricing, and logistics support!
FAQs – Block Bottom Polywoven Bags
Product Basics
1. What are block bottom polywoven bags used for?
They're ideal for fertilizers, seeds, pet food, and powdered chemicals.
2. How is the block bottom formed?
The bottom is glued with a laminated rectangular PP or paper panel to form a flat base.
3. Are these bags waterproof?
They are moisture-resistant, especially when laminated with BOPP film or PE liners.
4. What's the benefit of a block bottom over pillow style?
Better stackability, shelf presentation, and machine filling efficiency.
5. Are these bags reusable or recyclable?
Yes, they're recyclable and can be reused depending on the lamination.
Material & Printing
6. What is BOPP lamination?
A printed biaxially oriented polypropylene film laminated onto PP woven fabric.
7. Do you offer kraft paper laminated versions?
Yes, we provide paper poly block bottom bags for chemical and seed applications.
8. Can I print in full color?
Yes, gravure printing allows up to 10 colors with high-definition results.
9. Can I include QR codes, instructions, or icons?
Yes, you can print logos, charts, and compliance info.
10. Is matte or gloss finish available?
Yes, both matte and glossy BOPP finishes are available.
Sizes & Structure
11. What sizes are common?
Typically 25kg and 50kg, but custom sizes from 5kg are also offered.
12. Do you make valve-type block bottom bags?
Yes, ideal for automated filling systems in fertilizer factories.
13. What closure types do you offer?
Open-mouth (sewn or heat-sealed), and valve-type for high-speed filling.
14. Can I request micro-perforation?
Yes, we can provide micro holes for ventilation.
15. Do you offer anti-slip surfaces?
Yes, optional anti-slip embossing is available.
Applications
16. Are these bags safe for chemical powders?
Yes, paper laminated versions are suitable for industrial chemicals.
17. Can I use these for grass seed?
Yes, they're widely used for retail and bulk seed packaging.
18. Are they good for urea and NPK blends?
Yes, especially the BOPP laminated options with sealing for moisture control.
19. Can I use these for pet food?
Yes, they're ideal for dry dog or cat food packaging.
20. What about animal feed?
Yes, but we recommend PE liner insert for very fine powders.
Ordering & Shipping
21. What is your minimum order quantity (MOQ)?
Usually 5,000 pieces per design.
22. Can I order mixed sizes or designs?
Yes, we support mixed SKUs in one shipment.
23. Do you ship to the Middle East?
Yes, we export regularly to UAE, Saudi Arabia, Qatar, and Jordan.
24. Do you offer samples before mass production?
Yes, free samples are available upon request.
25. What's your production lead time?
15–25 working days depending on quantity and design.
Support & Logistics
26. What HS code do these bags fall under?
HS Code 630533 (for laminated woven polypropylene sacks).
27. Do you offer OEM or private label services?
Yes, we support full branding with your artwork and language.
28. Can I get documentation for customs?
Yes, we provide CO, invoice, packing list, and certificate of origin.
29. What payment methods do you accept?
T/T, LC, and PayPal for trial orders.
30. How do I get started?
Send us your bag size, lamination choice, quantity, and artwork-we'll quote within 24 hours.
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