Product Overview
The auto-lock bottom folding carton with integrated tear-strip tamper seal is engineered for frozen food packaging — from premium frozen meals and ice cream to frozen seafood and ready-to-bake goods. Manufactured by Guangdong Bincai Color Printing (founded 2003, Foshan, 18,000 sqm, ISO 9001:2015 & FSC-C147399 certified), this carton combines moisture-resistant PE-coated SBS board with a patented tear-strip opening that provides visible tamper evidence — consumers can see at a glance if the package has been opened. The auto-lock bottom pops open for high-speed filling lines, and the tear strip eliminates the need for scissors or knives at point of use. Daily output reaches 1.7 million boxes on KBA Rapida 105 and Heidelberg CD 102 7+1 UV presses with Bobst SP 102 BMA/E die-cutters, Bobst Visioncut 106 LER, and Bobst Expertfold 145 folder-gluer.
Customization Options
| Option | Available Choices |
|---|
| Board | PE-coated SBS 18–24pt, PE-coated kraft, metallized PET laminate barrier |
| Coating | Single-side PE, double-side PE, PLA bio-coating |
| Tear Strip | Perforated zipper, laser-scored easy-open, pull-tab tear tape |
| Printing | CMYK offset + 2 PMS spot colors, flexo up to 6 colors |
| Ink Type | Food-grade soy-based, low-migration UV, water-based flexo |
| Window | Anti-fog PET window for product visibility at freezer temperatures |
| Size Range | 80×60×30mm to 350×250×80mm |
| Special Features | Microwave-safe vent holes, re-closable tab, QR code panel |
| Branding | High-gloss UV spot, matte/gloss contrast, metallic cold foil |
| MOQ | 1000 units (standard), 3000+ (custom die tooling) |
Production Specifications
- Press: Heidelberg CD 102 7+1 UV for premium graphics; KBA Rapida 105 for high-volume runs
- Die-Cutting: Bobst SP 102 BMA/E with tear-strip perforation tooling; Bobst Visioncut 106 LER
- Board: PE-coated SBS (Solid Bleached Sulfate) 18–24pt, moisture barrier ≥ 50 g/m²/24h
- Folding/Gluing: Bobst Expertfold 145 with auto-bottom folding and tear-strip insertion
- Adhesive: Water-based, freezer-grade (-40°C to +40°C stability)
- Ink: Low-migration UV or food-grade soy-based, compliant with EU 1935/2004 and FDA 21 CFR
- Daily Output: 1.7M color boxes + 220,000+ specialty cartons
Quality Control — Key Checkpoints
| # | Checkpoint | Specification |
|---|
| 1 | PE coating integrity | No pinholes — dye penetration test |
| 2 | Moisture barrier | WVTR ≤ 50 g/m²/24h at 38°C/90% RH |
| 3 | Tear strip perforation | Clean tear, no board fiber tear-out |
| 4 | Auto-bottom lock | Pops open fully, zero adhesive needed |
| 5 | Freezer performance | No delamination at -25°C for 180 days |
| 6 | Print adhesion on PE surface | Cross-hatch tape test — zero lift |
| 7 | Food safety migration | Compliant with EU 1935/2004 overall migration limits |
| 8 | Glue bond at freezer temp | ≥2.5 N/cm² after 7 days at -18°C |
| 9 | Tamper evidence | Visible fiber tear on seal break |
| 10 | AQL sampling | ISO 2859-1, Level II, AQL 1.5 |
Applications
| Industry | Application | Key Feature |
|---|
| Frozen Meals | Premium entrées, plant-based bowls | Tear strip = no-scissor opening |
| Ice Cream & Desserts | Pint and quart cartons, gelato tubs | PE coating resists condensation and freezer burn |
| Frozen Seafood | Shrimp, fish fillet, seafood medley packs | Tamper-evident seal for food safety assurance |
| Frozen Bakery | Croissants, pastries, cookie dough | Anti-fog window for product visibility |
| Meal Kit Delivery | Recipe-specific ingredient cartons | Auto-bottom speeds up kit assembly lines |
| Food Service | Bulk frozen ingredient cartons | Industrial sizes up to 350×250×80mm |
Sustainability
| Practice | Detail |
|---|
| FSC Certified Board | SBS from responsibly managed forests |
| PE-Coated Recyclability | Compatible with paper mill repulping systems |
| Soy-Based Inks | Renewable, low-VOC, food-safe |
| Flat-Pack Design | Ships flat, 70% freight reduction vs. rigid alternatives |
| Water-Based Adhesives | Solvent-free, food-safe indirect contact |
Why Bincai
| Differentiator | Detail |
|---|
| 22-Year Legacy | Since 2003 — trusted food packaging partner |
| 18,000 sqm | Dual-factory food-grade production lines |
| BRC-IoP Capable | British Retail Consortium packaging standard |
| Bobst Expertfold 145 | High-speed auto-bottom folding for volume runs |
| ISO 9001 & FSC | Quality + sustainability certified |
| Free Samples | 5–7 working days including freezer testing (freight collect) |
MOQ 1000 units. Trial orders welcome. Free pre-production samples with freezer validation. Lead time 25–35 days. Phone: +86-18934352881 (Mr. Zhou). Email: qo82@icloud.com. Request free quote →
