Heavy Duty Kraft Paper Bags with PE Inner Liner | Moisture-Proof for Feed Additives

Product Overview: 
This product is a heavy-duty kraft paper bag with a built-in PE liner, specifically designed for packaging 25 kg of premixes and feed additives. The outer layer is made of thickened kraft paper, offering high strength and excellent tear resistance; the inner layer features a composite PE barrier film to provide moisture-proof and leak-proof performance. The bag is available in either flat-bottom or valve-bottom styles, with multi-color custom printing options, and complies with all relevant regulations for feed packaging.

Applicable materials: 
Feed additives, premixes, vitamin premixes, mineral premixes, pharmaceutical additives, enzyme preparations, amino acids, probiotics, mold inhibitors, antioxidants, and other high-value feed additives.

Packaging specifications: 
Loading weight: 25 kg (standard)

Bag dimensions: customizable (common sizes include 500×700 mm, 550×750 mm, etc.)

Bag types: flat bag / valve bag / M-seam bag (optional)

Liner: PE barrier film (laminated or co-extruded liner)

Core Advantages: 
Thickened kraft paper with high strength and tear resistance, a moisture- and leak-proof PE inner liner, standard 25 kg packaging, suitable for pre-mixed feed filling, compliant with feed additive packaging requirements, and low water vapor transmission rate.

Material and Craftsmanship: 
Outer layer: Thickened kraft paper (basis weight optional: 80–120 g/m²)

Inner layer: PE barrier film (laminated or co-extruded liner)

Structure: Double-layer composite of kraft paper and PE film

Bag type: flat open-mouth bag or valve bag

Bottom style: heat-sealed bottom / sewn bottom (with liner paper)

Printing: 2 to 7-color gravure or flexographic color printing, with clear and abrasion-resistant graphics.

Sealing method (after filling): 
Flat pouch: heat-sealed closure (recommended), or sewn closure using a bag-sewing machine.

Valve bags: self-sealing valve opening, no additional sealing required.

Applicable filling method: 
Compatible with screw fillers, impeller fillers, air-flow fillers, gravity fillers, and manual filling (in cleanroom environments).

Tensile strength: 
≥500 N/50 mm (thickened kraft paper), suitable for stacking and transportation under a 25 kg load.

Moisture resistance: 
PE inner liner film reduces water vapor transmission by more than 95%, effectively preventing premixes from becoming damp and caked and protecting active ingredients from degradation, thereby extending shelf life to over 12 months.

Corrosion resistance grade: 
★★★★ (High tolerance to vitamins, minerals, and pharmaceutical ingredients in premixes)

Packaging drop test: 
25 kg payload, 1.2-meter free fall, six-sided drop test—no breakage, no material leakage

Printing standards: 
Food-grade, solvent-resistant ink compliant with feed labeling regulations (GB 10648). 100% barcode/QR code scan rate, supporting product traceability.

Customization Scope: 
Reserved area for multi-color overprinting of the brand logo, product name, ingredient list, instructions for use, and batch number

Warning labels may be added (“Moisture-Proof,” “Sun Protection,” “Store in a Cool, Dry Place”).

Barcodes, QR codes, anti-counterfeiting labels, metrology marks, and environmental recycling labels

Transparent window (displays the contents)

Environmental Compliance: 
The kraft paper layer is biodegradable, and the PE liner is recyclable. Export certification is available.

Key features: 
Thickened kraft paper: high strength, tear-resistant, and resistant to rupture—ideal for long-distance shipping.

PE inner liner: moisture-proof and leak-proof, ensuring the activity of the premix.

25 kg standard specification: meets the general packaging requirements of the premix industry.

Heat-sealed bottom design: excellent sealing, no pinholes, leak-proof

Exquisitely printed: ideal for brand promotion and the retail market.

Customizable: bag style, size, and printing can all be tailored to your needs.

Packaging specifications: 
Customizable: loading weight (standard 25 kg), bag body dimensions, bag style (flat mouth/valve mouth), sealing method, liner thickness, and printing area (single-sided or double-sided).

Applicable to: 
Feed additive manufacturers, premix processing companies, vitamin/mineral premix producers, pharmaceutical additive manufacturers, enzyme and amino acid suppliers, and feed additive export traders.

Price and Minimum Order Quantity: 
Negotiable