Our PP laminated kraft paper bags combine woven polypropylene strength with kraft paper lamination for superior moisture resistance and printability, ideal for 25-50kg heavy-duty industrial-grade packaging.
| Fabric Material | PP (Polypropylene) |
| Fabric Color | Milky white/transparent/semi-transparent/beige/blue/yellow/customized color/UV add |
| Fabric Ctructure | Tubular/Back seam |
| Fabric GSM | 30-100 gsm customized |
| Fabric Mesh | 5*5-14*14 |
| Fabric Denier | 600-2000 D |
| Bag Width | 30-70cm customized |
| Bag Length | 40-115cm customized |
| Capacity | 2kg, 5kg, 10kg, 20kg, 25kg,50kg or customized |
| BagTop | Heat cut/ cold cut/ zigzag cut/D cut/hemmed top |
| Bag Bottom Seal | Single line sewing/ double lines sewing/ easy open/ block bottom pasted/ valve |
| Coating to Fabric | PE Bright coating/Matt coating 9-25 gsm/( one side/ both sides) |
| Lamination to Fabric | Bopp/Matt Bopp/Kraft paper/White paper( one side/ both sides) |
| Printing | Flexo printing Max 5 colors/ gravure printing Max 10 colors |
| Bag Shape | Tubular/ M gussets/ Block bottom/Valves |
| Optional Processing | PE liner inside/ anti slip/Micro perforation/drawstring/ seal tape |
| Packaging | In bales/ Palletization with cardboard |
| MOQ | 5000 pics |
| Production Capacity | 300 tons/ month |
| Loading Port | Qingdao |
| Delivery Time | 15-40 days |
| Certification | FSSC22000/ISO22000/ISO9001/BRC/SGS |
| Payment | TT/LC |
| Samples | Free samples available |
1. Raw Material Preparation
- PP & PE Resin Mixing:
- Select polypropylene (PP) virgin pellets.
- Blend in a predefined ratio (e.g., 70% PP + 30% PE) for lamination.
- Kraft or white Paper Sourcing: High-tensile, moisture-resistant kraft paper rolls.
2. PP Woven Fabric Production
- Extrusion: Melt PP pellets into flat filaments.
- Weaving: Produce PP woven fabric rolls using circular/loom weaving machines.
- Fabric Inspection: Check for uniformity, tensile strength, and defects.
3. Printing
- Flexographic/Offset Printing:
- Apply designs, logos, or safety labels directly onto the Kraft or white Paper.
- Eco-Friendly Printing with Water-Soluble Inks
4. Lamination & Customization
- Melted PP/PE Coating:
- Melt the PP/PE resin blend and extrude it onto the printed PP fabric.
- Combine with kraft paper under high heat and pressure.
- Custom Feature Integration:
- Anti-Slip ink printing: Embossed patterns during lamination.
- Micro-Perforations: Punch small holes for breathability.
- Gusset Formation: Create side pleats for bag expansion.
- Cooling & Calendaring: Ensure smooth adhesion and uniform thickness.
5. Cutting & Sewing
- Cutting:
- Cold Cutting: For precise edges without melting.
- Hot Cutting: Seal edges to prevent fraying.
- Sewing Option:
- Heat Seal Sewing: Thermal bonding for airtight seams.
- Easy-Open Sewing: Easy open tapes for quick opening by users.
- Double-Stitched Sewing: Reinforced seams for heavy loads.
- Block Bottom & Valve Pasting:
- Form square/rectangular bases with glue-sealed corners.
- Attach filling valves using PE-based adhesives.
6. Quality Control
- Lamination Bond Test: Verify PP/PE-kraft paper adhesion strength.
- Seam Integrity Check: Pressure-test heat-sealed
- Load Capacity Test: Validate weight limits (e.g., 25kg/50kg).
- Custom Feature Inspection: Ensure micro-perforations, gussets, and anti-slip spikes meet specs.
7. Packaging & Storage
- Packaging option: In bales or Secure bags on wooden pallets and cardboard with shrink wrap.
- Warehousing: Store in dry, low-humidity environments.
Industry Applications of PP Laminated Kraft Paper Bags
1. Mining & Mineral Transportation
- Mining ore packaging laminated PP bags
- Charcoal storage kraft paper laminated sacks
- Product Relevance:
- High tear resistance for sharp minerals (e.g., iron ore, copper ore).
- Moisture-proof lamination prevents oxidation or clumping.
2. Construction Materials & Aggregates
- Sand and gravel storage PP laminated bags
- Construction aggregate packaging laminated kraft paper sacks
- Product Relevance:
- UV-resistant lamination for long-term outdoor storage on job sites.
- Customizable spout designs for easy pouring of granular materials.
3. Chemicals & Powdered Materials
- Chemical powder packaging laminated PP kraft bags
- Detergent industry laminated polypropylene sacks
- Product Relevance:
- Acid/alkali-resistant coatings for industrial powders (e.g., calcium carbonate, titanium dioxide).
- Anti-static (ESD) options available for flammable powders.
4. Grains & Agricultural Products
- Grain storage laminated PP kraft paper bags
- Rice and wheat packaging waterproof industrial sacks
- Product Relevance:
- Adjustable breathability to prevent mold growth in grains.
- FDA-compliant liners for food-grade safety.
5. Recyclables & Waste Management
- Recyclable materials collection laminated PP bags
- Plastic scrap storage industrial kraft paper sacks
- Product Relevance:
- High load capacity (50-100kg) for metal scraps or plastic fragments.
- Reusable design reduces waste management costs.
6. Animal Feed & Livestock
- Livestock feed packaging laminated PP bags
- Poultry feed storage UV-resistant sacks
- Product Relevance:
- Reinforced laminated structure to resist rodent damage.
- Heat-resistant sterilization compatibility for feed additives.
7. Hazardous Materials & Specialized Goods
- Hazardous material transport laminated kraft bags
- Flammable substance packaging UN-certified sacks
- Product Relevance:
- Compliant with UN-certified standards for hazardous material transport (with grade labeling).
FAQs: PP Laminated Kraft Paper Bags
1. Q: What is PP laminated kraft paper bags used for?
A: These bags are designed for heavy-duty industrial packaging, including cement, fertilizers, grains, chemicals, and mining materials. Their waterproof lamination ensures protection in harsh environments.
2. Q: What is the maximum weight capacity of these bags?
A: Our bags can safely carry 10kg to 100kg, depending on fabric GSM (60-100) and seam reinforcement. Custom load capacities are available.
3. Q: Are these bags waterproof?
A: Yes! The kraft paper-PP lamination provides excellent moisture resistance, making them ideal for outdoor storage or humid climates.
4. Q: Can I print my logo on the bags?
A: Absolutely. We offer high-resolution custom printing (up to 8 colors) for logos, labels, safety warnings, or QR codes.
5. Q: Do you provide food-grade laminated PP bags?
A: Yes. Food grade and certificated products options with food-safe inner liners are available for grains, flour, or animal feed.
6. Q: What's the MOQ (Minimum Order Quantity)?
A: MOQ starts at 5,000 bags for standard designs. Custom orders may require higher quantities.
7. Q: Are these bags recyclable?
A: Yes! Both PP and kraft or white paper components are 100% recyclable, aligning with sustainability goals.
8. Q: How long does production take?
A: Standard orders ship in 15-20 days. Rush orders (7-10 days) are possible with a surcharge.
9. Q: Can I request samples before bulk ordering?
A: Certainly. We provide free samples (you only pay shipping) to test quality and design.
10. Q: What certifications do your bags have?
A: We are ISO 9001:2015 certified and comply with REACH (EU), FDA (USA), and BRC standards.
11. Q: Are these bags UV-resistant?
A: Yes. UV-stabilized lamination prevents degradation during prolonged outdoor exposure.
12. Q: Do you offer anti-static (ESD) bags for flammable materials?
A: Yes. Anti-static options are available for chemicals, coal dust, or explosive powders.
13. Q: What sizes are available?
A: Standard sizes range from 50cm x 80cm to 60cm x 100cm, but fully customizable dimensions are offered.
14. Q: Can you add handles or straps to the bags?
A: Yes. We provide options for loop handles, die-cut handles, or reinforced straps for easy lifting.
15. Q: How do I calculate the right GSM for my product?
A: GSM depends on load weight and durability needs. For example:
- 90 GSM: Lightweight (25-30kg).
- 120 GSM: Heavy-duty (50-100kg).
16. Q: Are these bags suitable for hazardous materials?
A: Yes. We offer UN-certified laminated bags with hazard labels for safe transport of dangerous goods.
17. Q: What's the difference between BOPP and kraft paper lamination?
A: BOPP lamination enhances gloss and print clarity, while kraft paper adds rigidity and eco-friendly appeal.
18. Q: Do you provide inner liner bags?
A: Yes. Optional PE/PP inner liners are available for extra moisture or contamination protection.
19. Q: How are the bags shipped?
A: Bags are palletized or packed in bulk cartons. We support FCL/LCL sea freight, air, or express delivery.
20. Q: What's your warranty policy?
A: We guarantee defect-free products. If damage occurs due to manufacturing issues, we'll replace the batch at no cost.
Hot Tags: PP Laminated Kraft Paper Bags, Bopp Square Bottom Bag, ,
