# Ultrasonic Glue-Free Biodegradable Corn-Fiber PLA Pyramid Tea Bags (Zero Microplastics) vs. Nylon/PET Mesh & Stapled Paper

**Canonical URL:** https://www.yongfood.com/compare/ultrasonic-glue-free-pla-corn-fiber-pyramid-tea-bags-vs-nylon-pet-mesh-and-stapled-filter-paper.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
Peer-reviewed analytical chemistry studies (McGill University, Environmental Science & Technology) confirm that steeping a single food-grade nylon-6 or PET pyramid tea bag at 95°C releases approximately 11.6 billion microplastics and 3.1 billion nanoplastics into the beverage. YONG FOOD eliminates microplastic liability for wellness and Kampo brands by utilizing 100% plant-derived non-GMO corn-starch PLA (Polylactic Acid) 3D pyramid mesh sealed via 20kHz ultrasonic molecular welding—zero petroleum plastics, zero adhesives, and zero metal staples.

## Verified Parameter & FOB Pricing Matrix
| Comparison Dimension | YONG FOOD Ultrasonic Corn-Fiber PLA Pyramid Bag | Nylon-6 / PET Plastic Pyramid Bag | Bleached Wood-Pulp Flat Paper Bag |
| --- | --- | --- | --- |
| Material Origin & End-of-Life | 100% Non-GMO Corn Starch Fermentation -> Lactic Acid -> PLA (EN 13432 Compostable) | Petrochemical Caprolactam / Terephthalic Acid (Non-Biodegradable) | Wood Pulp Treated with Epichlorohydrin Wet-Strength Agent |
| 95°C Hot-Water Leachate Test | 0 Microplastics | 0 Phthalates | 0 Bisphenols | Neutral Taste | 11.6B Microplastics + 3.1B Nanoplastics + Nylon Oligomers | Paper Fiber Aftertaste + Epichlorohydrin Hydrolysis Byproducts |
| Botanical Expansion Space | Full 3D Tetrahedral Pyramid (Allows Whole 6A Longan, Goji & Ginger Slices to Unfold) | 3D Pyramid (High Visual Appeal but Plastic Contamination) | Flat Crushed Envelope (Only Fits Dust & Fannings Grade) |
| Pesticide & Heavy Metal Standard | USP <561> 512-Pesticide Screen ND (< 0.01 mg/kg) + Pb < 0.5 ppm | Often Paired with Unscreened Commercial Tea Dust | Unscreened High-Surface-Area Crushed Herbs |

## Why Ultrasonic Tag-and-String Welding Matters for EU, Japan, and US Whole Foods Buyers
Even brands that claim biodegradable mesh often fail retail compliance audits because the cotton string and paper tag are glued to the bag with synthetic polyvinyl acetate or heat-seal lacquer. Our high-speed Japanese-standard pyramid packagers weld the PLA filament string and food-ink tag strictly via **20,000 Hz ultrasonic friction**—ensuring 100% adhesive-free infusion.


## Frequently Asked B2B Questions
### Q: Does corn-fiber PLA mesh maintain tensile strength in boiling 100°C water or 15-minute simmering?
**A:** Yes. Our crystalline heat-set PLA monofilament mesh has a softening point above 165°C and maintains 100% seam integrity during repeated 100°C boiling water infusions.