Leave Your Message
Explore our most popular PP woven sack series — purpose-built for flour milling, grain storage, and food-grade bulk packaging applications worldwide.
A PP sack for flour packaging — commonly referred to as a polypropylene woven bag — is one of the most widely adopted packaging formats in the global grain and milling industry. Constructed from interwoven polypropylene (PP) tapes, these sacks deliver a unique combination of tensile strength, moisture resistance, breathability, and printability that makes them the preferred choice for flour mills, grain traders, food processors, and logistics operators worldwide.
Unlike traditional jute or paper bags, PP woven sacks offer superior load-bearing capacity (typically 25 kg, 50 kg, or custom up to 100 kg), outstanding resistance to tearing and puncture, and a smooth inner surface that prevents flour particles from adhering to the bag wall — ensuring minimal product waste and maximum hygiene compliance. The bags can be laminated with a BOPP film layer for enhanced moisture protection, or fitted with a PE liner for food-grade applications requiring airtight containment.
Standard PP flour sacks are manufactured from virgin-grade polypropylene resin, woven at a density of 10×10 to 14×14 threads per square inch, with a fabric weight ranging from 60 g/m² to 120 g/m² depending on the load requirement. The sacks are available in plain woven, BOPP laminated, or kraft paper-laminated variants. Common sizes include 40×60 cm, 45×75 cm, 50×80 cm, and 55×95 cm, with bottom sewing options including open-mouth, valve, or heat-sealed configurations.
UV stabilizers are routinely added during extrusion to extend outdoor storage life, while food-safe inks are used for multi-color flexographic or gravure printing — enabling brands to communicate product information, nutritional data, and corporate identity directly on the bag surface.
Driven by rising global flour consumption, food security initiatives, and the shift away from single-use plastics toward recyclable PP materials, the demand for high-performance PP sacks in the flour packaging segment is projected to grow at a CAGR of 5.8% through 2030. Asia-Pacific leads production, with China, India, and Southeast Asian nations accounting for over 60% of global supply.
The PP sack has become the dominant primary packaging format for wheat flour, corn flour, rice flour, and specialty grain flours across virtually every major producing and consuming nation. In developing markets across Africa, South Asia, the Middle East, and Southeast Asia, PP woven bags account for more than 80% of all flour packaging by volume — a testament to their cost efficiency, durability, and adaptability to diverse supply chain conditions.
Large-scale flour mills — processing upwards of 500 metric tonnes per day — rely on automated bagging lines that can fill and seal PP sacks at rates of 600–1,200 bags per hour. The mechanical compatibility of PP woven sacks with high-speed VFFS (Vertical Form Fill Seal) and open-mouth bagging machines has been a critical factor in their industrial adoption. Unlike multi-wall paper bags, PP sacks do not absorb moisture from the product or the environment, significantly reducing the risk of caking, mold growth, and premature spoilage during extended storage or ocean freight transit.
When benchmarked against paper bags, jute sacks, and flexible intermediate bulk containers (FIBCs) for retail flour packaging, PP woven sacks consistently outperform on three critical dimensions: cost per kilogram packaged, shelf life preservation, and supply chain resilience. A standard 50 kg PP flour sack costs approximately USD 0.25–0.45 to produce at scale — roughly 30–50% less than an equivalent multi-wall paper bag — while offering 2–3× greater puncture resistance and significantly lower moisture vapor transmission rates (MVTR).
PP woven sacks for flour cost 30–50% less than equivalent paper or jute alternatives, with superior durability reducing secondary packaging losses by up to 15% across the supply chain.
Food-grade PP resin and PE inner liners meet FDA, EU 10/2011, and GB 9685 standards. BOPP lamination provides an additional moisture barrier critical for tropical and humid-climate markets.
PP is 100% recyclable. Leading mills are now adopting recycled-content PP sacks and bio-based PP blends to meet ESG targets and comply with evolving single-use plastics regulations globally.
The next generation of PP flour sacks is incorporating QR codes, NFC tags, and RFID labels directly into the bag structure, enabling end-to-end traceability from the mill to the retail shelf. Consumers can scan a bag to verify origin, milling date, nutritional profile, and storage recommendations — a capability increasingly demanded by premium flour brands and institutional buyers in Europe and North America.
Advanced co-extrusion and metallized film lamination techniques are being applied to PP woven substrates to create ultra-high-barrier flour sacks capable of extending shelf life to 18–24 months without refrigeration. These innovations are particularly significant for export markets and humanitarian food aid programs where storage conditions are unpredictable.
As flour mills invest in Industry 4.0 automation, PP sack manufacturers are engineering bags with optimized surface friction coefficients, uniform fill weights, and standardized dimensions to ensure seamless compatibility with robotic palletizing systems, automated guided vehicles (AGVs), and AI-driven warehouse management platforms.
Bio-based polypropylene derived from sugarcane ethanol, post-consumer recycled (PCR) PP content sacks, and compostable PP-PLA blend woven bags are emerging as commercially viable alternatives. Major flour brands in the EU and UK are already piloting these formats in response to Extended Producer Responsibility (EPR) legislation taking effect between 2025 and 2027.
From industrial milling operations to last-mile retail distribution, PP woven sacks serve a remarkably diverse range of flour packaging use cases across the global food value chain.
Large-scale mills packaging 25–50 kg PP sacks use automated bagging lines processing 800+ bags/hour. BOPP-laminated sacks with valve tops enable dust-free filling and precise weight control, meeting ISO 22000 and HACCP certification requirements.
PP sacks for export are engineered with UV resistance, anti-slip coating, and reinforced bottom seams to withstand 20–30-day ocean transit. Palletized loads of 1,000–1,500 sacks per 20-foot container are standard, with moisture-barrier inner liners protecting product integrity in tropical climates.
5 kg and 10 kg BOPP-laminated PP sacks with high-resolution 8-color printing are used by premium flour brands for retail shelf presence. The glossy surface enables photorealistic imagery, brand storytelling, and multilingual regulatory compliance labeling in a single print run.
UN agencies, WFP, and NGOs source PP flour sacks meeting specific UN/FAO packaging standards for emergency food distribution in conflict zones and disaster-affected regions. Tamper-evident sealing and lot-number traceability are mandatory specifications in these procurement programs.
Commercial bakeries, pasta manufacturers, and confectionery producers source flour in 25–50 kg PP sacks for just-in-time production. The sacks are designed for easy opening, accurate dispensing, and compatibility with pneumatic conveying systems used in automated dough-mixing operations.
The rapidly growing organic, gluten-free, and ancient grain flour segment demands PP sacks with certified food-contact materials, allergen-free production environments, and premium printing capabilities. Kraft paper-laminated PP sacks are particularly popular in this segment for their natural aesthetic.
Founded in 2018 and headquartered in Linyi, Shandong Province, Linyi Silk Road International Trade Co., Ltd. is an enterprise integrating the research and development, production, sales and service of woven bags, jumbo bags and other packaging products. Adhering to the core values of "integrity, professionalism, dedication, cooperation and innovation" and driven by intelligent manufacturing, the company is committed to providing cost-effective packaging solutions for global customers, and has become an influential leader in the plastic weaving industry.
As the president of the plastic knitting industry, we always take "shaping the industry benchmark" as our mission, and through continuous technological innovation and resource integration, we promote the standardization and intelligent development of the industry, and help our customers to reduce costs and increase efficiency. With the vision of "creating a ten-billion-dollar enterprise and a hundred-year inheritance", the company adheres to the path of specialization and internationalization, and is committed to building a global leading industrial ecosystem, creating value for customers and contributing to the sustainable development of the society.
Linyi Silk Road International Trade Co., Ltd — Weaving the future with science and technology, linking the world with quality!
Linyi Silk Road International Trade Co., Ltd. was established in 2018. It currently has two major factories. One factory is located in Jinluo Science and Technology Park, Bancheng Town, Lanshan District, Linyi City, and the other is located in Menglianggu Industrial Park, Mengyin County, Linyi. The factory covers an area of more than 30,000 square meters, with 150 circular looms, a daily output of 20,000 ton bags and 200,000 woven bags, and 500 outstanding employees. It is a professional woven bag, ton bag production, processing, and sales company, with an annual output value of 500 million yuan. Products are sold to more than a dozen countries in Asia, Europe, the Middle East, etc. Domestic sales have covered 32 provinces and municipalities across the country, serving more than 3,000 companies and more than 600,000 customers nationwide.
To connect the world through service and create a better life for more people.
To build a 10-billion enterprise and establish a legacy that lasts a century.
Integrity · Professionalism · Dedication · Collaboration · Innovation
People-oriented at the core, win-win as the goal — lead by example in both words and actions.
Put people first, promote meritocracy, ensure fair evaluation, and empower employee growth.
When everyone thrives, we all rise together.
Craftsmanship · Quality · Intelligence · Efficiency
Sincerity, Enthusiasm, Professionalism, High Efficiency
Be proactive in learning and apply knowledge effectively.
Stay self-disciplined and refrain from unnecessary disputes.
Our cooperation spans across borders, and our products are exported to more than a dozen countries in Asia, Europe, Africa, the Middle East, etc. We adhere to the business philosophy of "honesty, customer first", and have received unanimous praise from foreign customers!
Care for your requirements from pre-sales to after-sales. Give you more than what you paid. Our dedicated team of packaging specialists provides end-to-end support — from custom design and sampling through to bulk production, quality inspection, and on-time delivery — ensuring every PP sack for flour packaging meets your exact specifications and exceeds your expectations.
Contact Us
We were honored to host our overseas client, with whom we had previously communicated online. We led our client to witness firsthand:
🔬 Tracing the Origin: From a single raw material to a resilient thread
🧵 Weaving: Observing how the threads are woven into a strong fabric
✂️ Creation: Precise cutting and sewing give the product its final form.
When we presented our carefully prepared samples alongside the products our client was using, their expressions of satisfaction were evident. The quality speaks for itself, and trust is built from this. We are delighted to have officially entered into a partnership with our client! Thank you for your trust and choice. We look forward to working together to create a better future!
Browse our full range of PP woven sacks and packaging solutions designed for flour milling, grain storage, and food-grade bulk packaging applications.
