Batch-level quality control
Products are checked at batch level so consistency can be judged against records rather than one-off demonstrations.
Qualidade
Qualidade e certificação
Sistema de gestão, ensaios de produto e patentes — documentos verificáveis com escopo e validade confirmados item a item.
How quality is controlled
Quality evidence you can verify, not slogans
Our quality management system is certified to ISO 9001:2015 (valid to Aug 2029), our raw-white PVA water-soluble yarn is OEKO-TEX Standard 100 certified at Product Class I — the baby-articles grade (valid to Jan 2027) — with the underlying TESTEX report published, and the company holds 34 granted Chinese patents plus registered patents in Nigeria and Malta. Review the documents below and verify certificate numbers with the issuing bodies before contracting.
Application-led validation
Specifications are confirmed against the buyer's real process — temperature, time, agitation and finishing conditions — before production.
Traceable sampling
Approved samples are linked to written specifications so bulk orders follow the result the buyer validated.
Documented evidence
Certification, testing and patent documents are available for review, with issuing bodies, scope and validity stated per document.
Certificates & reports
ISO · OEKO-TEX · SGS · patent documents
Click any document to view the full image; PDF originals are provided where available.
ISO 9001:2015 certificate (English)
Quality management system certificate covering production of water-soluble PVA yarns and sales of water-soluble PVA fibers.
- Certificate no.
- 23226Q00380R101
- Standard
- GB/T 19001-2016 / ISO 9001:2015
- Issued by
- Beijing Credit First Certification Co., Ltd. (IAF/CNAS)
- Valid until
- Aug 6, 2029
ISO 9001:2015 certificate (Chinese)
Chinese-language copy of the same certificate — holder: 山东荣沣纺织有限公司.
- Holder
- 山东荣沣纺织有限公司 / Shandong Three Thai Textile Co., Ltd.
- First issued
- Aug 9, 2023
- Reissued
- Aug 7, 2026
- Valid until
- Aug 6, 2029
OEKO-TEX Standard 100, Class I (baby articles)
7th renewal of certificate SH005 149658, issued by TESTEX (Zurich). Scope: 100% PVA water-soluble yarn in raw white — the strictest product class, for baby articles.
- Certificate no.
- SH005 149658
- Product class
- Class I (baby articles), Annex 6
- Test report
- SH005 275198.1 (all parameters passed)
- Valid until
- Jan 31, 2027
TESTEX test report SH005 275198.1 (2026)
Full 10-page TESTEX report behind the OEKO-TEX renewal: heavy metals, formaldehyde, pH 6.2, VOCs, PAH and more — all tested parameters within Class I limits.
- Report no.
- SH005 275198.1
- Test material
- PVA yarn (raw white)
- Issued
- Jan 7, 2026
- Laboratory
- TESTEX AG, Swiss Textile Testing Institute
SGS test report (yarn quality, 2020)
SGS report SL22002263585101TX on 7.5 tex PVA yarn: single thread strength, moisture content/regain, yarn count and evenness (June 2020).
- Report no.
- SL22002263585101TX
- Date
- June 19, 2020
Utility model patent (example)
ZL 2019 2 0067840.8 — water-soluble PVA/cotton blended wave-shaped thread (CN 209619548 U). One of 25 granted utility models.
Nigerian patent (2026)
Federal Republic of Nigeria patent RP: F/PT/C/O/2026/21316 — broken end detection and automatic feed stopping device for spinning frames.
- Registration
- RP: F/PT/C/O/2026/21316
- Priority
- CN 20251132549.7 · Sep 16, 2025
- Sealed
- Apr 10, 2026
Maltese patent (2026)
Malta patent No. 5964 — dust purification device for water-soluble yarn processing, granted under the Patents and Designs Act (Cap. 417).
- Patent no.
- 5964
- Priority
- CN 2025109190368 · Jul 3, 2025
- Registered
- Apr 20, 2026
Certificate numbers, scopes and dates above are transcribed from the documents on file. Before contracting, verify them through the issuing bodies' official channels (CFC: bjsxfxh.com · OEKO-TEX: oeko-tex.com/en/faq · TESTEX: testex.com) and with our team. Current original certificates are available on request.
Patents & intellectual property
Patents behind the process
The company holds 34 granted Chinese patents — 9 invention patents and 25 utility models — plus registered patents in Nigeria and Malta. Many cover the specific machinery and test methods used to spin, dye, test and handle water-soluble PVA yarn, which is why process details on this site can be backed by documents rather than marketing copy. Several patents are co-owned with a related company, Shandong Huimin Santai Textile Co., Ltd.; ownership is stated per certificate.
9
Invention patents (CN)
25
Utility models (CN)
2
Patents granted abroad
Granted invention patents
ZL 2021 1 1485226.1
Sole ownerIoT-based yarn finishing machine with uniform distribution
一种基于物联网的可分布均匀式纱线整理机
- Filed
- 2021-12-07
- Granted
- 2023-12-19 · CN 114182457 B
ZL 2023 1 1515068.9
Sole ownerElasticity testing device for water-soluble vinylon yarn
一种水溶性维纶纱弹性测试装置
- Filed
- 2023-11-14
- Granted
- 2024-03-15 · CN 117367975 B
ZL 2024 1 1912256.X
Sole ownerPreparation process for yak-cashmere / water-soluble-fiber blended yarn
一种牦牛绒和水溶纤维的混纺纱线的制备工艺
- Filed
- 2024-12-24
- Granted
- 2025-06-20 · CN 119663498 B
ZL 2022 1 0286031.2
Co-owned with a related companyDust-removal device for cop conveying and winding in intelligent textile production
一种智能纺织用的管纱输送卷绕筒除尘装置
- Filed
- 2022-03-22
- Granted
- 2023-12-15 · CN 114633987 B
ZL 2023 1 0531858.X
Co-owned with a related companyAutomatic spinning-drying device for chemical fiber production
一种化纤生产用纺丝自动干燥装置
- Filed
- 2023-05-12
- Granted
- 2023-08-25 · CN 116240638 B
ZL 2017 1 1466277.3
Co-owned with a related companyTextile system and its usage method
纺织用系统及其使用方法
- Filed
- 2017-12-28
- Granted
- 2019-05-10
ZL 2020 1 0227142.7
Co-owned with a related companyCapillary-penetration yarn waxing process
一种全面型毛细渗透式纱线上蜡工艺
- Filed
- 2020
- Granted
- 2025*
ZL 2020 1 0365670.9
Co-owned with a related companyEasy-to-dismantle textile rubber roller
一种拆装便捷的纺织胶辊
- Filed
- 2020-04-30
- Granted
- 2025-04-11 · CN 111536146 B
ZL 2020 1 1350928.4
Co-owned with a related companySelf-cleaning bobbin bracket for spinning frames
一种具有自净功能的纺纱纱筒支架
- Filed
- 2020-11-27
- Granted
- 2023-05-26 · CN 112551264 B
Patents granted abroad
Nigeria
Broken-end detection and automatic feed-stopping device for spinning frames
- Patent no.:
- RP: F/PT/C/O/2026/21316
- Priority:
- CN 20251132549.7 · 2025-09-16
- Patent date:
- Feb 9, 2026
Malta
Dust purification device for water-soluble yarn processing
- Patent no.:
- No. 5964
- Priority:
- CN 2025109190368 · 2025-07-03
- Registered:
- Apr 20, 2026
Granted utility models (full list)
All 25 utility models are registered to 山东荣沣纺织有限公司 (Shandong Three Thai Textile Co., Ltd.).
Show all 25 utility model patents
| Patent no. | Publication | Title | Granted |
|---|---|---|---|
| ZL 2019 2 0067840.8 | CN 209619548 U | Water-soluble PVA/cotton blended wave-shaped thread | 2019-11-12 |
| ZL 2020 2 1051878.5 | CN 212334209 U | Hollow yarn with good moisture conductivity | 2021-01-12 |
| ZL 2020 2 1828339.8 | CN 213476216 U | Warm, moisture-absorbing hollow yarn | 2021-06-18 |
| ZL 2020 2 1828402.8 | CN 213480448 U | Workshop air-conditioning system for water-soluble yarn production | 2021-06-18 |
| ZL 2020 2 1834975.1 | CN 213476203 U | Variable-frequency ring spinning frame | 2021-06-18 |
| ZL 2021 2 0206765.6 | CN 214271137 U | Wool-oil dosing device for water-soluble yarn | 2021-09-24 |
| ZL 2021 2 0206782.X | CN 214300715 U | Yarn steaming device for water-soluble yarn | 2021-09-28 |
| ZL 2021 2 0206784.9 | CN 214300723 U | Hollow-yarn unwinding device | 2021-09-28 |
| ZL 2021 2 0221226.X | CN 214300496 U | Opening & cleaning device for water-soluble vinylon | 2021-09-28 |
| ZL 2021 2 0221227.4 | CN 214268703 U | Storage rack for finished water-soluble yarn | 2021-09-24 |
| ZL 2022 2 0232653.2 | CN 217298121 U | Foreign-fiber isolation room for water-soluble yarn raw material | 2022-08-26 |
| ZL 2022 2 0232654.7 | CN 217191455 U | High-efficiency cleaning machine for water-soluble yarn waste containers | 2022-08-16 |
| ZL 2022 2 0233201.6 | CN 217304407 U | Intelligent sampler for water-soluble yarn testing | 2022-08-26 |
| ZL 2022 2 1611143.2 | CN 217499531 U | Impurity-removal device for opening & cleaning machines | 2022-09-27 |
| ZL 2022 2 2939030.1 | CN 218403161 U | Production device for parallel-spun water-soluble vinylon core yarn | 2023-01-31 |
| ZL 2022 2 2944642.X | CN 218860999 U | Processing equipment for high-count vinylon PVA water-soluble yarn | 2023-04-14 |
| ZL 2022 2 2949209.5 | CN 218711120 U | Spinning device for hollow yarn from water-soluble vinylon | 2023-03-24 |
| ZL 2022 2 2968610.3 | CN 218520715 U | Production device for openwork single-jersey knitted fabric using water-soluble yarn | 2023-02-24 |
| ZL 2022 2 3009630.4 | CN 218812588 U | Even-dyeing yarn dyeing device for textile equipment | 2023-04-07 |
| ZL 2022 2 3032543.0 | CN 219218505 U | Dust-suction device for textiles | 2023-06-20 |
| ZL 2022 2 3080759.4 | CN 218629045 U | Sampler for water-soluble yarn performance testing | 2023-03-14 |
| ZL 2022 2 3259047.9 | CN 218812349 U | Can-change protection device for drawing frames handling water-soluble yarn | 2023-04-07 |
| ZL 2022 2 3295072.2 | CN 218621168 U | Waste-suction device for water-soluble yarn spinning | 2023-03-14 |
| ZL 2022 2 3338114.6 | CN 218909409 U | Double-yarn automatic winder for water-soluble yarn | 2023-04-25 |
| ZL 2024 2 0403546.0 | CN 222412350 U | Dust-removing sizing device for fabric | 2025-01-28 |
Titles, numbers and dates are transcribed from patent certificates and CNIPA register documents on file. English titles are working translations; the registered Chinese titles are authoritative. Patent validity is maintained by paying annual fees — request the current register extract for any specific patent before relying on it contractually.
How to verify our documents
Match the certificate holder to the contracting entity — the legal entity is 山东荣沣纺织有限公司, trading internationally as Shandong Three Thai Textile Co., Ltd.
Check the product scope: the offered grade, color and use must fall within the certificate or test scope.
Check validity dates and verify the number through the issuing body's official channel.
Ask for lot-specific release records when your risk assessment requires them.
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