Eco-Friendly DOTP Manufacturers | Shandong Changxing & Jining Wansheng | Two Companies, One Group
Shandong Changxing Plastic Additives Co., Ltd. is the group parent — a national high-tech enterprise with 20+ years of R&D, ISO certifications, and global customer channels. Jining Wansheng Environmental Materials Co., Ltd. is the group's wholly owned production subsidiary — a modern plant in Wenshang Chemical Industry Park built around recycled-PET circular chemistry. This article introduces both companies separately, showing what each brings to buyers and partners around the world.
This article is intended for PVC compounders, plasticizer distributors, and procurement managers evaluating suppliers of non-phthalate DOTP, MEG, and related intermediates. It provides a factual overview of each company's positioning, product lines, capacity, and certifications.
Key Takeaways
- One group, two entities: Shandong Changxing handles R&D, certifications, and customer service; Jining Wansheng handles circular-economy manufacturing.
- Product lines: DOTP (premium/qualified), DCP, MEG, 2-octanol, 2-octanone.
- Production capacity: 300,000 metric tons annually across the group, with a 450,000-tonne long-term target.
- Certifications: Four ISO systems (9001/14001/45001/50001), REACH compliance, SGS-tested.
- Circular economy: Wansheng consumes 40,000+ tonnes of waste material annually, with over 50% domestic market share in recycled-PET plasticizer.
Shandong Changxing Plastic Additives Co., Ltd.
Company Profile
Founded on 3 December 2004 and headquartered in Jining, Shandong Province, Shandong Changxing Plastic Additives Co., Ltd. (山东长兴塑料助剂股份有限公司) is a national high-tech enterprise specializing in R&D, production, and sales of eco-friendly plasticizers (DOTP), DCP, and MEG. With registered capital of RMB 59 million, the company occupies over 100 mu in the Jining Canal Economic Development Zone New Materials Park and employs more than 300 full-time staff.
Over two decades, Shandong Changxing has accumulated a growing portfolio of utility-model and invention patents and software copyrights. It has been recognized as a gazelle enterprise, a single-product champion, and holds multiple provincial-level R&D platform designations.
Product Lines
Shandong Changxing's product portfolio is built around phthalate-free plasticizers and related chemicals, with a DOTP production capacity of approximately 150,000 tonnes per year at the parent plant:
- DOTP (Dioctyl Terephthalate) — a general-purpose, non-phthalate plasticizer for PVC cable, flooring, film, and automotive interiors.
- DCP (qualified coproduct grades) — co-produced with DOTP for lower-specification compounding needs.
- MEG (Monoethylene Glycol) — used in coolant, antifreeze, natural gas dehydration, and polyester intermediates.
- 2-Octanol — feedstock and fine-chemical intermediate.
Certifications & R&D
Shandong Changxing's management systems cover ISO 9001, ISO 14001, ISO 45001, and ISO 50001, giving export buyers a documented quality, environmental, safety, and energy-management foundation. The company also operates an academician workstation and holds the Shandong Provincial Enterprise Technology Center designation, reflecting a sustained commitment to R&D.
Group Role
As the group parent, Shandong Changxing concentrates patents, certifications, customer relationships, and technical service. The same R&D team that develops DOTP formulations for cable, flooring, and automotive compounds also provides the technology backbone for the group's subsidiary production sites.
Jining Wansheng Environmental Materials Co., Ltd.
Company Profile
Jining Wansheng Environmental Materials Co., Ltd. (济宁万生环保材料有限公司) is a wholly owned subsidiary of Shandong Changxing Plastic Additives. Located in the Wenshang Chemical Industry Park on a 106-mu site, Wansheng is the group's dedicated green manufacturing base.
The plant is designed around one idea: use post-consumer and post-industrial PET waste as feedstock instead of relying only on virgin petrochemicals. This circular-economy approach is not a marketing add-on — it is built into the plant's architecture from raw-material intake to finished-product storage.
Circular Economy: From Waste to Plasticizer
Wansheng collects discarded clothing cuttings, fishing nets, dust-protection nets, and agricultural film. The material is washed, crushed, pre-treated, and then fed into a continuous process that produces DOTP and DCP. By mid-2025 the plant was already consuming more than 40,000 tonnes of waste material annually, and its recycled-PET plasticizer accounted for a leading share of the domestic category.
Capacity & Expansion
Wansheng's first phase was commissioned in mid-2024 with 80,000 tonnes per year of plasticizer capacity. In 2026, a second-phase technical upgrade added new distillation columns, refining reactors, and continuous de-alcoholization towers. The site now operates at approximately 150,000 tonnes per year, with product color values controlled below 100 and unit energy consumption reduced through continuous distillation.
Environmental Compliance
Wansheng's green credentials come from both process and project design. The Jining Ecological Environment Bureau approved the 150,000-tonne plasticizer project through the standard EIA process. The plant design emphasizes closed-loop water use, waste-gas treatment, and energy recovery. Wansheng also participates in production-education-research programs with university partners, gaining access to analytical and catalysis expertise.
Group Growth Path
The group is building capacity in stages so that quality keeps pace with scale:
- Shandong Changxing parent plant — approximately 150,000 tonnes per year of DOTP capacity at the Jining headquarters, plus MEG and octanol derivatives.
- Wansheng phase I — 80,000 tonnes per year of plasticizer capacity, commissioned in mid-2024.
- Wansheng phase II — expanded to approximately 150,000 tonnes per year after the 2026 technical upgrade.
- Group direction — public recruitment and investment profiles describe a long-term target of 450,000 tonnes annual group output.
These numbers are directional, but the message is clear: a multi-site expansion plan, a recycling feedstock strategy, and a government-approved environmental track record.
Competitive Pricing Through Circular Economy & Automation
Waste-to-Feedstock: Lower Material Cost
Conventional DOTP producers rely entirely on virgin petrochemical feedstocks — purified terephthalic acid (PTA) and 2-ethylhexanol (2-EH) — whose prices track crude oil and refined-chemical markets. Wansheng takes a fundamentally different route: its feedstock is post-consumer and post-industrial PET waste — discarded clothing cuttings, fishing nets, dust-protection nets, and agricultural film. These materials are abundant, locally sourced in Shandong and neighboring provinces, and structurally cheaper than refined petrochemical intermediates.
With over 40,000 tonnes of waste material consumed annually and a domestic market share exceeding 50% in the recycled-PET plasticizer category, Wansheng has turned what was once a disposal burden into a stable, low-cost raw-material stream. This feedstock advantage is not a short-term market fluctuation — it is designed into the plant from raw-material intake to finished-product storage. The result: DOTP priced competitively against conventional producers while delivering equivalent or better technical specifications — ester content ≥99.5%, low acid value, and color values consistently below 100 Hazen.
Automation & Digitalization: Lower Operating Cost
The Wansheng plant was designed from the ground up for continuous, automated operation. Most production workflows — from feedstock conveying to distillation to finished-product packaging — are now automated and digitally monitored:
- Continuous distillation replaces conventional batch processing. The process runs 24/7 with real-time temperature, pressure, and flow-rate control, reducing unit energy consumption and eliminating batch-to-batch quality variation.
- Automated feeding systems convey shredded PET flakes directly from pretreatment into the production line, minimizing manual material handling and associated labor costs.
- Phase II technical upgrade (2026) deployed 60+ new equipment units — distillation columns, refining reactors, continuous de-alcoholization towers — all integrated into a centralized digital control system.
- Digital process control enables predictive quality adjustments before off-specification material is produced, reducing waste, rework, and maintenance downtime.
These automation investments directly compress per-tonne operating and maintenance costs. For international buyers, this means stable, competitive pricing without sacrificing the ISO 9001/14001/45001/50001-certified quality system that export markets require. The combination of low-cost recycled feedstock and low-cost automated production is structural — it does not depend on temporary subsidies or favorable exchange rates.
Recognized by Government, Verified by Media
The environmental and economic value of this circular-economy model has been formally recognized by Chinese government authorities at multiple levels:
- National High-Tech Enterprise — reflecting sustained R&D investment, 51+ patents, and 6 software copyrights accumulated over two decades.
- Shandong Provincial Gazelle Enterprise — a government designation for high-growth, innovation-driven small and medium-sized enterprises.
- Single-Product Champion — recognizing market leadership in the recycled-PET-based plasticizer category.
- Academician Workstation and Shandong Provincial Enterprise Technology Center — provincial-level R&D platform credentials that signal sustained technical capability beyond basic production.
- EIA approvals published by the Jining Ecological Environment Bureau and Wenshang County Government, providing public, verifiable evidence of environmental compliance.
These are not self-declared claims. They are awarded after government review, site inspection, and public notification. Combined with media coverage from Jining News Network, People's Daily Online, Mysteel/Oilchem, and Wenshang County Government (detailed below), they provide independent, third-party validation that the group's environmental and economic contributions are real — and that buyers are dealing with a supplier whose credentials are a matter of public record.
Media Coverage
The group's work has been covered by local and national platforms, providing independent verification that our plants, projects, and products are visible in the public record.
- Jining News Network (August 2025) — Wansheng: Unlocking the "Green Potential" of Waste Materials — reported on Wansheng's closed-loop processing of waste clothing, fishing nets, and agricultural film into plasticizers, highlighting continuous distillation technology and a domestic market share exceeding 50%.
- Jining News Network (April 2026) — Accelerating Enterprise Technical Upgrades, Empowering High-Quality Development — followed up with the second-phase technical upgrade, highlighting 60+ new equipment units (distillation columns, refining reactors, continuous de-alcoholization towers), product color values below 100, and reduced unit energy consumption.
- People's Daily Online (April 2025) — Jining University Visits Wenshang County for Industry–University–Research Cooperation — covered a university delegation visit to Wansheng as part of a broader production-education-research partnership program.
- Mysteel / Oilchem (July 2026) — Shandong Changxing Industrial-Grade MEG Price Bulletin — published real-time market pricing for 15,000 tonnes/year of industrial-grade monoethylene glycol (≥99.5%), reflecting the company's visibility in commodity market intelligence.
- Wenshang County Government (January 2026) — EIA Approval Notice for 50,000-tonne DOTP Feeding Method Technical Upgrade — published the environmental impact assessment review for Wansheng's process improvement project, demonstrating regulatory transparency.
Why Partner With Us
Shandong Changxing provides the R&D, certifications, and customer-facing technical service. Jining Wansheng provides the scale, the recycled-PET feedstock system, and the modern manufacturing infrastructure. Together, they offer three things that are hard to fake: scale, a documented recycling feedstock, and a publicly visible compliance history.
For export buyers, the ISO suite and non-phthalate DOTP line are the most relevant entry points. For sustainability-focused brands, the recycled-PET plasticizer story is the differentiator. Both paths lead back to the same quality control system.
Frequently Asked Questions
What does Shandong Changxing Plastic Additives do?
Shandong Changxing is the group parent company, founded in 2004 and headquartered in Jining. It handles R&D, certifications (ISO 9001/14001/45001/50001), customer relationships, and technical service. Its product portfolio includes DOTP, DCP, MEG, and 2-octanol.
What does Jining Wansheng Environmental Materials do?
Jining Wansheng is a wholly owned production subsidiary of Shandong Changxing, located in Wenshang Chemical Industry Park on a 106-mu site. It operates a circular-economy plant that converts waste PET (clothing cuttings, fishing nets, agricultural film) into DOTP and DCP plasticizers.
What is the relationship between Shandong Changxing and Jining Wansheng?
Jining Wansheng Environmental Materials is a wholly owned subsidiary of Shandong Changxing Plastic Additives. Changxing handles R&D, certifications, and customer channels, while Wansheng operates the green manufacturing plant in Wenshang Chemical Industry Park.
What products does the group manufacture?
The core products are DOTP (non-phthalate PVC plasticizer), DCP (co-product grades), MEG (monoethylene glycol for coolant and industrial uses), and 2-octanol / 2-ethylhexanol derivatives.
How does Wansheng use recycled materials?
Wansheng collects waste clothing cuttings, fishing nets, dust-protection nets, and agricultural film, then washes, crushes, and pre-treats the PET-rich material to produce DOTP and DCP plasticizers. The plant consumes over 40,000 tonnes of waste material annually.
What is the group's production capacity?
Wansheng's first phase has 80,000 tonnes/year of plasticizer capacity. The approved second phase is designed for 100,000–150,000 tonnes/year, and the group is publicly aiming for a 450,000-tonne annual scale.
What certifications does Shandong Changxing hold?
Public records list ISO 9001, ISO 14001, ISO 45001, and ISO 50001, plus recognition as a national high-tech enterprise, gazelle enterprise, and single-product champion.
Request a Quotation
Shandong Changxing Plastic Additives Co., Ltd. is an ISO 9001 certified manufacturer with 300,000 tons annual capacity. We supply DOTP, DCP, MEG, 2-octanol, and chemical intermediates to clients worldwide.
- SGS-tested: Phthalate-free, EN 71-3, PFAS-free certified
- Four ISO systems: 9001 / 14001 / 45001 / 50001
- National "Little Giant" enterprise with exports to 30+ countries
Read more: Wansheng 100K-Ton DOTP Expansion, Recycled PET to DOTP Circular Model, DOTP Product Page.
Shandong Changxing Plastic Additives Co., Ltd.
July 2026
