# Constant 康斯坦

> Constant 康斯坦 (Guangdong Constant Biotechnology Co., Ltd.) is a professional OEM/ODM manufacturer of eco-friendly pet poop bags and cat litter liners, founded in 2022 and based in Chashan, Dongguan, Guangdong, China. Six material systems: compostable (PBAT + corn starch), oxo-degradable, bio-based, PCR/GRS recycled, ocean-bound plastic (OBP) and conventional PE. Bag formats: flat-bag rolls, vest-handle rolls, boxed vest bags and cat litter drawstring liners. Certifications: ISO 9001, SEDEX, BSCI, TUV OK Compost (Home/Industrial), EN 13432, ASTM D6400, BPI, EPI, GRS, OBP.

## Core Pages

- [/](https://tt.xiaofair.com/): Overview of Constant 康斯坦 — eco-friendly poop bag manufacturer, material systems, certifications and OEM/ODM services
- [/products](https://tt.xiaofair.com/products): Full OEM/ODM product catalog — compostable, bio-based, PCR/GRS recycled and OBP poop bags & cat litter liners
- [/solutions](https://tt.xiaofair.com/solutions): OEM white-label, ODM custom design and full turnkey manufacturing services from concept to shelf
- [/factory](https://tt.xiaofair.com/factory): Manufacturing facility tour — material blending, film blowing, bag making, packaging print and QC, certifications
- [/about](https://tt.xiaofair.com/about): Company profile since 2022, green material systems, core values and vision
- [/contact](https://tt.xiaofair.com/contact): Request a quote — free consultation, reply within 24 hours
- [/faq](https://tt.xiaofair.com/faq): Answers on products, material systems, certifications, OEM services and sample policy
- [/resources](https://tt.xiaofair.com/resources): Eco poop bag material guides and industry insight articles

## Product Categories

- [Compostable & Biodegradable](https://tt.xiaofair.com/products?category=compostable): PBAT + corn starch; certified home & industrial compostable, ≥90% degradation in 180 days. (3 models)
- [Oxo-Degradable](https://tt.xiaofair.com/products?category=oxo-degradable): HDPE + EPI/D2W additive; fractures under light/oxidation to reduce long-term plastic pollution. (3 models)
- [Bio-Based Material](https://tt.xiaofair.com/products?category=bio-based): BIO-HDPE from sugarcane/corn starch; renewable plant-based, significantly lower carbon footprint. (3 models)
- [PCR / GRS Recycled](https://tt.xiaofair.com/products?category=pcr-grs): HDPE with post-consumer recycled content, GRS certified for resource circular use. (3 models)
- [Ocean-Bound Plastic (OBP)](https://tt.xiaofair.com/products?category=obp): Recycled from plastic waste within 50km of coastlines; OBP certified, intercepts ocean plastic at source. (3 models)
- [Traditional HDPE (PE)](https://tt.xiaofair.com/products?category=hdpe): Durable, leak-proof virgin polyethylene; not degradable — please sort & recycle after use. (2 models)
- [Cat Litter Liners](https://tt.xiaofair.com/products?category=cat-litter-liner): Drawstring cat litter liner bags for easy, hygienic waste disposal. (1 models)

## Resources & Guides

- [Company Profile](https://tt.xiaofair.com/resources/company-profile): A high-tech biotech enterprise pioneering a "pet + environment" path.
- [Eco Materials Guide](https://tt.xiaofair.com/resources/materials-guide): Six eco material systems with degradation performance & compliance.
- [OEM/ODM Service](https://tt.xiaofair.com/resources/oem-service): Full OEM/ODM customization across all eco materials & bag types.
- [Certifications](https://tt.xiaofair.com/resources/certifications): SEDEX, BSCI, TUV OK Compost, EN 13432, ASTM D6400, GRS, ISO 9001 & more.
- [Core Values](https://tt.xiaofair.com/resources/core-values): Green R&D, circular economy, carbon management, green pet lifestyle.
- [Vision & Outlook](https://tt.xiaofair.com/resources/vision): Driving the pet industry toward a greener, healthier, responsible future.

## Featured Products

- [Compostable Poop Bag Rolls — 4 Rolls Mixed Color](https://tt.xiaofair.com/products/compostable-4rolls-mixed) (Model CONST-CPB-4R)
- [Compostable Poop Bag Rolls — 8 Rolls Color Box](https://tt.xiaofair.com/products/compostable-8rolls-box) (Model CONST-CPB-8R)
- [Bio-Based Poop Bag Rolls — 20 Rolls Box](https://tt.xiaofair.com/products/bio-based-20rolls-box) (Model CONST-BIO-20R)
- [GRS Recycled Poop Bags — 3 Rolls + Dispenser Set](https://tt.xiaofair.com/products/grs-3rolls-dispenser) (Model CONST-GRS-3D)
- [Ocean-Bound Plastic Poop Bags — 16 Rolls PVC Bag](https://tt.xiaofair.com/products/obp-16rolls-pvc) (Model CONST-OBP-16R)
- [Drawstring Cat Litter Liners](https://tt.xiaofair.com/products/cat-litter-liner-drawstring) (Model CONST-CLL-DS)

## Key Facts

- Founded: 2022
- Facility: manufacturing base in Chashan, Dongguan, Guangdong, China — material blending, film blowing, bag making, packaging print and QC
- HQ: 东莞市, 广东省, China
- Certifications: ISO 9001, SEDEX, BSCI, TUV OK Compost (Home/Industrial), EN 13432, ASTM D6400, BPI, EPI, GRS, OBP
- Contact: jessicachan@constant-bio.com, +8613580720826