Wansheng Plasticizer Capacity: 80,000 Tonnes Today, 180,000 upon Full Completion

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 currently operates 80,000 tonnes per year of DOTP (dioctyl terephthalate) plasticizer capacity from Phase I. A 100,000 tonnes/year Phase II expansion is under construction, with commissioning planned for May 2027; upon full completion Wansheng will reach 180,000 tonnes per year, and together with the Changxing headquarters site's 50,000 tonnes/year as per environmental approval, the group will reach 230,000 tonnes per year. 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: PET Recycling Innovation for DOTP Production

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.

Phase I Line Upgrade: 60+ Units for DOTP Quality and Efficiency

Alongside process innovation, Wan Sheng invested in modernizing its Phase I production line. 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 upgraded equipment removes impurities from PET raw materials effectively and improves colour consistency, a clear indicator of stable DOTP quality. 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 in Recycled PET DOTP

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.

Plasticizer Capacity: 80,000 Tonnes Today, 180,000 upon Full Completion

Wan Sheng Environmental currently operates 80,000 tonnes per year of plasticizer capacity from Phase I. The 100,000 tonnes/year Phase II project was approved in May 2025 and is under construction, with commissioning planned for May 2027.

Together with the Changxing headquarters site's 50,000 tonnes/year as per environmental approval, the planned 180,000 tonnes/year at Wansheng will bring the group to 230,000 tonnes/year upon full completion.

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.

"With the second phase, our total capacity will reach 180,000 tonnes per year - Phase I 80,000 tonnes plus Phase II 100,000 tonnes."

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 Plasticizer 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 group plasticizer capacity that reaches 230,000 tonnes upon full completion (Wansheng 180,000 tonnes + Changxing headquarters 50,000 tonnes as per environmental approval).

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