Explore our flagship high-performance industrial films, spout pouches, and heat-sealable paper designs manufactured under certified ISO and GMP standards.
As the international packaging sector undergoes a structural shift away from single-use plastics, heat sealable paper bags have emerged as a critical innovation. This packaging concept combines the natural texture and organic recyclability of cellulose fibers with specialized thermo-polymer coatings, resulting in a bag that maintains structural integrity on high-speed industrial filling lines while meeting strict compostability regulations. Modern heat sealable paper packaging behaves like flexible plastic laminate but can be integrated directly into municipal paper recycling streams.
Historically, the major limitation of raw paper packaging was its poor barrier performance and inability to form hermetic heat seals. Today, by utilizing advanced aqueous dispersion coatings and bio-degradable polymer layers (such as PLA, PBAT, or PBS), manufacturers can control properties like moisture vapor transmission rates (MVTR) and oxygen transmission rates (OTR) without sacrificing paper's end-of-life environmental benefits.
Multi-layered coatings reduce moisture migration, ensuring that crisp foods, powders, and pet kibbles retain their dry texture and freshness throughout their targeted shelf life.
Formulated seal layers achieve top-tier seal values (N/15mm), resisting high-drop impacts and vertical pressure during transport, storage, and retail display.
Compliant with international standards for repulpability and organic recovery, reducing plastic footprint while enhancing eco-friendly brand alignment.
Dongfa Printing customizes the technical layers of heat sealable paper pouches based on your application's physical stress requirements and shelf-life targets. We process premium kraft paper bases (ranging from 40 gsm to 120 gsm) in bleached (white) and unbleached (brown) formats, paired with food-grade barrier coatings.
| Material Configuration | Typical Thickness / Weight | Barrier Rating (O₂ / H₂O) | Key Properties | Primary Industrial Use |
|---|---|---|---|---|
| Kraft / Water-Based Dispersion Coating | 60 gsm - 100 gsm | Moderate / Medium | Highly repulpable, plastic-free certification feel, biodegradable | Oats, flour, dry snacks, sugar packing |
| Kraft / PLA (Polylactic Acid) | 70 gsm + 20-30 µm PLA | Medium / High | Compostable under industrial parameters, robust inner structural seal | Pet treats, premium organic coffees, tea leaf bags |
| Kraft / EVOH / PE (High Barrier) | 80 gsm + Multi-Layer Co-ex | Exceptional / Ultra-High | Gas barrier properties, maximum grease resistance (Kit Rating > 10) | High-fat food powders, liquid sauces, active yeast |
| Unbleached Kraft / PBS (Polybutylene Succinate) | 50 gsm - 90 gsm | Medium / Medium-High | Low seal temperature start, elevated heat tolerance, highly flexible | Bakery wraps, fast food takeaway seals, grain pouches |
Each formulation is calibrated using gas-chromatography testing to guarantee that the migration of volatile compounds remains well below food contact regulations (FDA 21 CFR and EU 10/2011). We optimize the "heat seal window"—the range of temperatures and dwell times where the seal reaches peak strength without causing thermal degradation to the paper base.
Different markets present distinct mechanical demands on packaging. As a global manufacturer, Dongfa Printing configures heat-sealable paper bags to address these international realities:
For cereals, granular sugar, pulses, and dry powders, our bags provide dust-free sealing margins and stable shelf integrity on automated form-fill-seal (FFS) machinery.
Equipped with high-barrier metalized paper options or biodegradable films that prevent essential oil volatilization and oxygen degradation, keeping aromas locked inside.
Engineered grease-resistant barriers prevent fat migration to the exterior, keeping the bag dry and presentable on retail shelves.
Dongfa Printing offers custom-tailored packaging adjustments to meet your specific design and operational requirements:
By using modern, high-precision flexographic and rotogravure printing machines equipped with inline camera inspection systems, we ensure color consistency (ΔE < 1.0) and prevent print registration errors across large production runs.
Dongfa Printing Co., Ltd. has over 35 years of professional experience in printing and packaging manufacturing. We provide all kinds of packaging, specialize in the development and production of various liquid packaging films and bags, suitable for use in pasteurization and retort steam sterilization processes, as well as different types of spout bags and sealing cup films. Base on the printing machine with online quality inspection equipment and GMP workshop, we adhered to excellent materials, professional production and strict quality control. We can provide you superior products and best service.
Since its establishment, Dongfa Printing has been committed to providing customers with efficient and high-quality printing services. Our business scope covers the entire process from design, plate making to printing and binding. Whether it's commercial printing or personalized customization, we can fulfill customer needs with our professional technical skills and attentive service.
Our company is dedicated to producing custom flexible packaging for food, medicine, daily-use products, and chemical products. We offer a wide range of products, including spout bags, retort bags, back sealing bags, three-side seal bags, stand-up pouches, quad-seal pouches, flat-bottom bags, zipper pouches, and customized roll films. We consistently use high-quality materials for professional production and strict quality control.
Our products are mainly exported to the Middle East, Southeast Asia, Africa, North America, and Japan, and have received widespread praise from customers. Dongfa Printing's corporate vision is to become a leading company in the printing industry. We strive for excellence, constantly innovate, and are dedicated to providing customers with better printing products and services. Additionally, we prioritize environmental protection and sustainable development, striving to reduce pollution and waste in the production process, and contributing to the harmonious development of society and the environment.
Our corporate values are "integrity, professionalism, innovation, and win-win." We uphold integrity as our foundation, professionalism as our basis, innovation as our driving force, and strive for win-win outcomes with customers, employees, and society. These values not only guide our business practices but also inspire our team to continuously move forward. We have a professional and knowledgeable team ready to serve you. We sincerely welcome you to visit our company for further business and cooperation opportunities!
We can provide you superior products and best service.
Navigating global compliance is a vital aspect of packaging procurement. Dongfa Printing ensures that all heat-sealable paper bags and films comply with regional testing directives:
Quality control at Dongfa is process-driven. Inside our GMP-compliant cleanrooms, every batch of heat-sealable packaging undergoes rigorous testing. Our QA testing includes:
Verifies the strength and resistance of paper fibers to bursts or tears during handling and distribution.
Measures the strength of the heat seal immediately after formation while still hot, ensuring it holds during fast vertical filling.
Determines Water Vapor Transmission Rate (WVTR) and Oxygen Transmission Rate (OTR) to guarantee food freshness and prevent staling.
Our packaging technology focuses on continuous improvement in performance and environmental impact. The research and development team at Dongfa Printing is currently working on several key initiatives:
1. Fully Plastic-Free Water-Dispersed Coatings: Designing barrier layers that dissolve completely during the paper re-pulping process, leaving no synthetic microplastic residues in the recovered fibers.
2. Cellulose Nanofiber (CNF) Barriers: Applying ultra-thin layers of plant-derived nano-cellulose to significantly lower oxygen and moisture transmission rates, providing a bio-based alternative to EVOH.
3. Advanced High-Temperature Tolerant Coatings: Developing heat-resistant paper materials that withstand pasteurization and high-pressure steam cooking (up to 121°C) for shelf-stable liquid foods.
Yes. Our heat sealable paper bags are engineered to run on standard automatic FFS machinery. However, because paper does not conduct heat as quickly as thin plastic film, you may need to adjust the sealing temperature slightly or increase the dwell time. Our technical support team can help you calibrate these settings for your specific machine.
Our dispersion-coated and water-barrier paper bags are designed for standard paper recycling systems. During repulping, the barrier coating breaks down and separates from the paper fibers, allowing the high-quality wood pulp to be fully recovered and reused.
Depending on the material configuration (such as water-based dispersion, PLA, or PBS), our bags achieve seal strengths from 3.5 N/15mm to over 15 N/15mm. This makes them strong enough to hold up under the weight of heavier products and withstand shipping conditions.
Yes. We apply specialized oil and grease-resistant coatings that achieve a high Kit Test rating (ranging from 6 to 12). This barrier keeps oils from migrating through the paper, preventing grease spots and keeping the exterior of the bag looking clean.
Yes, we can. Using high-precision welding equipment, we heat-seal spouts and resealable zippers directly into the paper structure. We offer both standard plastic and compostable bio-polymer fitments to match your packaging goals.
Depending on the product, shelf life typically ranges from 6 to 18 months. By customizing the barrier layers (adding EVOH, metalized films, or PVDC-free coatings), we can match the moisture and oxygen protection levels of traditional plastic laminates.
Our standard MOQ for custom orders ranges from 10,000 to 30,000 pieces, depending on the bag's size, shape, and printing options. Please contact our sales team with your specifications, and we can provide a detailed quote and options for your run size.
Browse our full selection of flexible packaging solutions, designed for high-temperature sterilizations, spout-dispensed liquids, and high-barrier shelf life preservation.
DongFa Printing
