Product Overview
Bincai’s kraft paper sandwich wrap box with PLA compostable window combines sustainability with food service functionality. The 350gsm unbleached kraft board provides a natural, earthy brand aesthetic while the PLA window — derived from renewable corn starch — offers product visibility and full compostability. Printed with soy-based inks and featuring a water-based grease-resistant interior coating, this box meets EN 13432 and ASTM D6400 standards for industrial and home composting. The auto-lock bottom design enables rapid assembly, making it ideal for high-volume food service operations.
Manufacturing Specifications
- Board: 350gsm unbleached kraft board — natural brown finish, no bleaching agents
- Window Material: 40-micron PLA (polylactic acid) film — certified compostable per EN 13432, clarity >92%
- Printing: Soy-based ink, up to 4-color offset on KBA 1050 press
- Interior Coating: Water-based grease barrier — repels oil/moisture without plastic lamination
- Closure: Auto-lock bottom with tuck-top lid
- Assembly: Flat-packed, pops open in 2 seconds
- Compostability: Home compostable (6 months) and industrial compostable (90 days)
- Daily Output: 1.7M boxes
- Certifications: ISO 9001:2015, FSC Chain-of-Custody, EN 13432 compostable
Size Configurations
| Food Type | Box Size (L×W×H) | Capacity |
|---|
| Standard Sandwich | 160×140×75mm | 1 sandwich or wrap |
| Large Sandwich/Burger | 180×150×85mm | 1 large burger or double sandwich |
| Pastry/Danish | 140×120×65mm | 2-3 pastries |
| Salad Bowl | 200×180×90mm | 500ml salad capacity |
| Wrap/Pita | 220×100×80mm | 2 wraps |
Customization Options
| Option | Available Choices |
|---|
| Board | 300gsm, 350gsm, 400gsm natural kraft or OCC recycled board |
| Window | PLA (compostable), rPET (recycled, non-compostable), or no window |
| Window Shape | Rectangle, oval, custom die-cut shape |
| Printing | Soy-based ink CMYK + 1 Pantone spot |
| Coating | Water-based grease barrier (standard), PLA bioplastic lining |
| Closure | Auto-lock bottom, tuck-top, or tab-lock top |
| Add-ons | Ventilation holes, tear-off coupon panel, QR code for sustainability story |
| MOQ | 5,000 units per SKU |
Sustainability Credentials
| Credential | Detail |
|---|
| Board Source | FSC-certified mixed sources — chain-of-custody verified |
| Window | Plant-based PLA — 68% lower carbon footprint than PET |
| Ink | Soy-based — VOC-free, biodegradable |
| Coating | Water-based — no PFAS, no plastic lamination |
| End-of-Life | Home compostable (EN 13432) — breaks down in backyard compost |
| Recyclability | Kraft board recyclable in standard paper streams (window removed) |
Production Quality
| Test | Standard | Specification |
|---|
| Grease Resistance | TAPPI T-559 | Kit rating ≥8 (60°C, 24h) |
| PLA Clarity | Internal | ≥92% light transmission |
| Auto-lock Function | Internal | ✓ Pops open with single squeeze |
| Print Colorfastness | Internal | No soy ink transfer after 48h stacking |
| Compostability | EN 13432 | ≥90% biodegradation within 180 days |
| Food Safety | EU 1935/2004 | Migration limits compliant |
Why Choose Bincai
Bincai leads the transition to sustainable food packaging with a dedicated eco-friendly production line in our 18,000 sqm facility. FSC chain-of-custody certification ensures responsible fiber sourcing from forest to finished box, while our EN 13432 compostable certification provides verified end-of-life claims — not just marketing. For food service brands, QSR chains, and corporate cafeterias looking to eliminate single-use plastics without sacrificing functionality, Bincai’s kraft PLA window box delivers the complete solution.
