# Constant 康斯坦

> Constant 康斯坦 (Guangdong Constant Biotechnology Co., Ltd.) is an OEM/ODM manufacturer of eco-friendly pet products, founded in 2022 and based in Chashan, Dongguan, Guangdong, China. Materials: Compostable, Oxo-degradable, Bio-based, PCR/GRS recycled, Ocean-bound plastic, Conventional PE. Bag formats: Flat-bag rolls, Vest-handle rolls, Boxed vest bags, Cat litter liners. Contact us for applicable certification and testing documentation.

## 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

- [Compostable Poop Bags: A Buyer's Guide](https://tt.xiaofair.com/resources/compostable-sourcing-guide): # Compostable Poop Bags: A Buyer's Guide to Materials, Certificates and Specs

Compostable is the fastest-growing claim in the pet waste category — and the easiest one to get wrong. This guide is written for brand owners and procurement teams evaluating a compostable poop bag programme. It covers what the claim actually means, which certificates to demand, how to read a spec sheet, and the workflow from sample to shelf.

## What "compostable" actually means

A compostable bag must pass a recognised standard, and almost all buyers mean the industrial standard: EN 13432 in Europe, ASTM D6400 in North America, AS 4736 in Australia. The pass criteria are strict — 90% biodegradation within 180 days, disintegration within 12 weeks, no ecotoxicity to plants (seed germination tests to OECD 207/208), and limits on heavy metals. A home-compostable claim (OK Compost HOME) is a different, rarer certification with a lower temperature regime. If a supplier cannot name the standard their film passed, the claim is marketing, not fact.

## The certificate package to ask for

For any compostable programme, request four documents before the first order: (1) the EN 13432 or ASTM D6400 test report for the exact film grade — reports are grade-specific and cannot be transferred between suppliers; (2) a material declaration stating the PBAT and PLA share; (3) eco-toxicity data from the seed-sprouting test; (4) a declaration of compliance for your destination market, for example alignment with the EU PPWR or the US FTC Green Guides. A credible factory supplies these as a matter of course; a weak one quotes a certificate number and nothing else.

## Reading the spec sheet

Three numbers do most of the work. Thickness: 8-12 microns suits light dispenser rolls, 15-20 microns carries a full pickup from a full-size dog, and anything above 20 microns is usually wasted money in a compostable film. Bag size: flat bags run 20x30 to 23x33 cm, vest bags 25x38 to 30x45 cm — too small and owners cannot tie the bag, too large and material cost jumps with no perceived value. Bag count: 15-60 per roll for dispensers, 50-150 per retail box for shelf. Ask for a pre-production sample at the exact gauge and size before approving tooling.

## MOQ, lead time and sampling

Standard MOQ is 3,000-10,000 bags per SKU; first orders can often run 1,000-2,000 bags as a paid trial at a trial price. Lead time is 25-35 days from deposit and artwork sign-off — tooling and film blending 15-20 days, printing and bag making 7-10 days, QC and packing 3-5 days. Sampling is free for existing platforms and ships within 3 working days; custom-printed samples take 7-10 days after artwork confirmation. Book capacity 45 days ahead of pet-industry trade-show windows, which cluster in March-May and September-October.

## Pitfalls that burn buyers

First, oxo-degradable is not compostable — an EPI additive fragments the bag but passes no composting standard, and EU retailers increasingly reject the claim outright. Second, "biodegradable plastic" claims are restricted in the EU and scrutinised under the FTC Green Guides in the US; if your pack says compostable, your market needs the matching certificate on file. Third, compostable film has a shorter shelf window than PE — buy in production quantities, not annual volumes, and store below 30°C away from direct sun. Fourth, never seal compostable bags inside conventional bin liners for disposal; the whole point of the material is the industrial composting stream.

## Procurement checklist

Before you sign, confirm: the standard and test report for the exact film grade; the PBAT/PLA ratio and bio-content figure; gauge, size and bag count on a physical sample; MOQ and trial-order route; lead time including tooling; the certificate package for your market; and the factory's own quality and social credentials — ISO 9001 and SMETA are the baseline for any serious retail vendor. Ask for the factory audit report, not a promise of one.

## Why this matters commercially

Retail buyers in Europe and North America now ask for the certificate package at the listing stage, not after the order. Brands that can produce EN 13432 paperwork on day one win the listing; brands that improvise lose the shelf and sometimes face delisting. The material decision is made once, at the start of the programme — which is exactly why it deserves this much scrutiny.
- [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): 六大环保材料体系详解：成分、降解表现、认证与适用市场——选膜是拾便袋项目最重要的单一决策。
- [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 location: Chashan, Dongguan, Guangdong, China
- HQ: Chashan, Dongguan, Guangdong, China
- Contact: jessicachan@constant-bio.com, +8613580720826