Jining City is accelerating industrial transformation by focusing on its "232" cluster strategy, driving enterprises toward intelligent and green manufacturing. At the heart of this initiative is Wan Sheng Environmental Materials Co., Ltd., a subsidiary of Shandong Changxing Plastic Additives, located in the Wenshang Chemical Industrial Park. The company now operates 150,000 tons per year of DOTP (dioctyl terephthalate) capacity, with plans for an additional 150,000 tons in the future — bringing the total vision to 300,000 tons annually. This reinforces its position as a leader among plasticizer manufacturers that convert waste PET into high-performance products.

This article explores how Wan Sheng's process innovation, equipment upgrades, and government-backed expansion are setting new benchmarks for recycled PET-based plasticizer production in China.

From Waste to Value: Process Innovation at Wan Sheng

Wan Sheng Environmental is a specialized chemical research and production enterprise whose flagship product is plasticizer. Traditionally, the company used discarded clothing and dust-control netting as raw material, feeding it directly into production. This approach introduced excessive impurities, making it difficult to achieve target product specifications.

To solve this, Wan Sheng reformed its process. The new technology uses a screw extruder to heat waste clothing and dust netting to a molten state, purifying the PET content and reacting it with iso-octanol to produce DOTP plasticizer. This closed-loop approach transforms what was once waste into a valuable chemical feedstock, aligning perfectly with circular economy principles.

Equipment Upgrades: 60+ Units for Quality and Efficiency

Alongside process innovation, Wan Sheng invested heavily in production line modernization. The company purchased more than 60 advanced units, including:

• Distillation towers for precise separation and purification
• Refining reactors to ensure consistent product quality
• Continuous de-alcoholization towers for efficient solvent recovery
• Heat exchangers to maximize energy utilization

According to Wang Qingkang, Chairman and General Manager of Wan Sheng Environmental, the new equipment removes impurities from PET raw materials effectively, achieving a color number below 100 — a clear indicator of premium-grade DOTP. At the same time, the system recovers heat from the PET melt, reducing production costs significantly. Natural gas consumption is cut by more than 10 cubic meters per ton of product.

Market Leadership: 50%+ Domestic Share, 40,000+ Tons of Waste Diverted

Wan Sheng Environmental's commitment to sustainable production has translated into strong market performance. The company now consumes over 40,000 tons of waste materials annually, diverting significant volumes of discarded textiles and plastics from landfills. Its products command a domestic market share exceeding 50%, with primary sales concentrated in the Jiangsu and Zhejiang regions — two of China's most industrialized provinces.

These numbers demonstrate that recycled PET DOTP is not a niche experiment but a scalable, commercially dominant solution. For procurement managers seeking reliable supply from established plasticizer manufacturers, Wan Sheng's track record offers confidence.

Capacity Scale-Up: 150,000 Tons Now, 300,000 Tons in Vision

Contrary to earlier news reports, Wan Sheng Environmental's current actual DOTP production capacity has already reached 150,000 tons per year. The second-phase workshop is now operational, having passed equipment installation and commissioning.

Looking ahead, the company is planning an additional 150,000 tons of capacity. Once this future expansion is realized, Wan Sheng's total annual output will reach 300,000 tons of DOTP — making it one of the largest recycled PET-based plasticizer production bases in the region.

This scale-up is backed by proactive government support. Jin Zhidong, Deputy Director of Wenshang County Nanzhan Sub-district Office, confirmed that local authorities coordinate directly with regulatory departments to resolve bottlenecks such as environmental assessment quotas and planning adjustments, ensuring each phase proceeds smoothly and achieves results quickly.

"Our current annual production capacity has reached 150,000 tons, and we are planning an additional 150,000 tons to build a 300,000-ton production base."

Broader Context: Jining's Industrial Transformation Push

Wan Sheng's story is part of a larger municipal initiative. In 2026, Jining City is deepening its role as a national pilot for digital transformation of small and medium-sized enterprises. The city is implementing 1,000 industrial new-build and technical renovation projects, each with an investment of over 5 million yuan. The goal: achieving a 50% deep digital transformation rate among regulated industrial enterprises.

Another example cited in the same report is Weishan Hongwei Textile Technology, which invested over 80 million yuan in intelligent equipment including automatic winding robots and packaging machines. The results: 8% reduction in energy consumption per ton of yarn, 10% lower labor costs, and 100 million yuan increase in output value.

Why This Matters for Global Buyers

For international procurement teams, Wan Sheng Environmental's expansion signals three key advantages:

As a subsidiary of Shandong Changxing Plastic Additives, Wan Sheng Environmental benefits from the parent company's deep expertise in recycled PET DOTP technology, four ISO certifications (9001, 14001, 45001, 50001), and a total group capacity of 300,000 tons.

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