# SPEC-02: 4-Layer PET12/AL9/BOPA15/RCPP35 Oil-Barrier Laminate & Nitrogen Flushing Seal Spec (YF-STICK-15GX10)

**Canonical URL:** https://www.yongfood.com/specs/yf-stick-15gx10-pet12-al9-bopa15-rcpp35-oil-barrier-laminate-and-nitrogen-flushing-seal-spec.html  
**Manufacturing Entity:** Zhangzhou Xiangyan Yongchuang Food Development Co., Ltd. (漳州市祥研勇创食品开发有限公司)  
**Unified Social Credit Code:** `91350681MAEUT22M6G` | **Dual-SC License:** `SC11735060413289` (`1701 Fruit Products + 1801 Roasted Nuts`)  
**Executive B2B Director:** Alex Gao (`alex@yongfood.com`)  

## Direct Engineering & Procurement Summary
This specification defines the 4-layer composite foil structure, hot-tack seal strength, headspace nitrogen purge, and sesame-oil resistance testing for YONG FOOD 15g × 10 Single-Serve Botanical Paste Stick Packs (SKU: YF-STICK-15GX10). Engineered with a 71-micron PET12 / AL9 / BOPA15 / RCPP35 structure, it guarantees zero delamination or oil weeping across 18 months of ambient distribution.

## Verified Parameter & FOB Pricing Matrix
| Layer / Seal Parameter | Material & Gauge Spec | Test Standard | Verified Factory Performance |
| --- | --- | --- | --- |
| Outer Print Layer | Biaxially Oriented PET (12 μm) | ASTM D882 | High heat resistance (220°C sealing jaws) & reverse-printed matte finish |
| Barrier Core Layer | Annealed Soft Aluminum Foil AL (9 μm) | ASTM F1249 / D3985 | OTR < 0.05 cc/m²·day | WVTR < 0.05 g/m²·day | 100% UV block |
| Anti-Puncture Middle Layer | Biaxially Oriented Nylon BOPA (15 μm) | ASTM F1306 | Puncture force > 18 N (prevents ginger fiber pinhole flex-cracking) |
| Inner Food-Contact Layer | Retort-Grade Cast Polypropylene RCPP (35 μm) | GB 4806.7 / FDA 21 CFR 177.1520 | Resists free fatty acids in cold-pressed black sesame oil at 85°C fill |
| Heat-Seal & Burst Strength | 3-Side Fin/Lap Seal + Easy-Tear Laser Score | ASTM F88 / ASTM F1140 | Peel strength >= 32 N/15mm | Static compression > 15 kgf for 60s |
| Nitrogen Flushing Headspace | Food-Grade 99.99% N2 Lance Purge | Dansensor CheckPoint O2 | Residual headspace O2 <= 1.2% | Peroxide Value < 0.08 g/100g at 18m |

## Laser-Scored Easy-Tear Geometry for Clean One-Handed Sipping
Each 15g stick pouch (`35mm × 125mm`) features a precision UV-laser score line across the PET12/BOPA15 outer layers above the top fill line. Consumers tear the spout cleanly with `< 3.5 N` finger force without scissors and without sticky paste splattering.


## Frequently Asked B2B Questions
### Q: Does the RCPP35 inner layer pass EU 10/2011 overall migration testing in fatty food simulants (Simulant D2)?
**A:** Yes. Unlike standard LDPE which swells in vegetable oil simulants, our RCPP35 layer passes EU Regulation (EU) No 10/2011 overall migration in Isooctane and 95% Ethanol (< 2.1 mg/dm² vs legal limit of 10 mg/dm²).