PE inner barrier for moisture protection, BOPP outer lamination for premium print — engineered for products that demand more than bare woven fabric.
PE inner lamination is applied as a continuous extruded film bonded directly to the inside surface of the woven fabric. This eliminates the micro-pores inherent in uncoated woven PP, reducing moisture vapour transmission rate (MVTR) to levels suitable for cement, flour, sugar, salt, and other products that absorb atmospheric moisture. Standard PE lamination thickness ranges from 15 to 40 microns, with thicker coatings specified for products requiring extended shelf life or exposure to humid storage conditions. Double lamination — PE inside and BOPP outside — provides the complete package: full moisture barrier, premium graphics, and enhanced mechanical strength.
Sackora supplies laminated bags in all standard bag formats including open mouth, valve top, gusseted, and block bottom configurations. Lamination is applied during bag manufacturing and does not affect bag dimensions, filling compatibility, or closure method. Whether you need basic moisture protection for industrial cement bags or full-colour retail packaging for consumer food products, lamination is the engineering solution that extends woven PP performance beyond the capability of bare fabric.
Available Sizes
Click any size below for full specifications, or request a custom size.
All specifications are fully customizable. Contact us to discuss your exact requirements.
| Material | Woven Polypropylene (PP) with film lamination |
|---|---|
| Base Fabric Weight | 55 – 110 GSM |
| PE Inner Lamination | 15 – 40 microns extruded polyethylene |
| BOPP Outer Lamination | 18 – 25 microns biaxially oriented polypropylene |
| Total Bag Weight | 80 – 160 GSM (fabric + lamination) |
| Dimensions (W × L) | 35 × 60 cm to 60 × 105 cm |
| Load Capacity | 10 – 50 kg |
| MVTR (PE laminated) | < 5 g/m²/24h (at 38°C, 90% RH) |
| Printing (BOPP surface) | Up to 8-colour rotogravure or 6-colour flexographic |
| Food Grade | CFIA and FDA compliant options available |
PE-laminated bags are essential for flour mills, sugar refineries, and food ingredient processors packing hygroscopic products that absorb moisture from ambient air. The continuous PE film prevents moisture ingress that causes caking, clumping, and microbial growth. Food-grade lamination from virgin PE meets CFIA and FDA requirements for direct food contact, protecting both product integrity and regulatory compliance.
Cement and dry-mix products are extremely moisture-sensitive — even minor humidity exposure causes premature hydration and product failure. PE-laminated PP woven bags are the standard packaging for Portland cement, plaster, tile adhesive, and self-levelling compound across the Canadian construction supply chain. The laminated barrier maintains product viability through warehouse storage, truck transport, and outdoor job site conditions.
Road salt, pool salt, water softener salt, and industrial chemicals packed in laminated bags resist moisture absorption and caking during seasonal storage. Laminated bags also prevent fine powder products from dusting through the fabric weave, reducing product loss and keeping pallets, warehouses, and retail displays clean. Double-laminated bags with BOPP exterior add brand visibility for retail salt and chemical products.
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Learn More →PE (polyethylene) lamination is applied to the inner surface of the bag to create a moisture and vapour barrier. It is a continuous film that seals the micro-pores in the woven fabric. BOPP (biaxially oriented polypropylene) lamination is applied to the outer surface to provide a smooth, glossy print surface and improve puncture resistance. PE lamination is functional (moisture protection), while BOPP lamination is primarily visual (print quality) with secondary mechanical benefits.
Yes. Double-laminated bags with PE inner and BOPP outer are a common specification for products that require both moisture protection and premium retail graphics. This is the standard configuration for consumer flour, specialty rice, pet food, and branded construction products. The combined lamination adds approximately 35–65 microns of film to the base fabric weight.
Laminated PP bags are more complex to recycle than uncoated bags because the lamination film must be separated from the woven base during processing. However, PE and BOPP are both polyolefin materials compatible with PP recycling streams, and many industrial recyclers accept laminated PP bags. Sackora can provide guidance on recycling options available in your region and help specify the minimum lamination thickness needed for your application to reduce material usage.
If your product absorbs moisture from the air (is hygroscopic), generates fine dust that could escape through woven fabric, or requires a specific moisture content at point of use, PE inner lamination is recommended. If your product is sold at retail and requires high-quality branded packaging, BOPP outer lamination is recommended. Products like cement, flour, sugar, and salt almost always require PE lamination. Sackora can test your product's moisture sensitivity and recommend the appropriate lamination specification.
MVTR stands for Moisture Vapour Transmission Rate — the rate at which water vapour passes through the bag material, measured in grams per square metre per 24 hours. Uncoated woven PP has a relatively high MVTR because moisture can pass through the micro-gaps between woven tapes. PE lamination reduces MVTR to below 5 g/m²/24h, which is sufficient for most moisture-sensitive products. Lower MVTR means better shelf life and fewer quality issues related to moisture absorption during storage and transport.
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