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Professionalism & integrity win the respect of customers

Zhejaing JoySun

Established in 2005, we have built a comprehensive factory area that integrates synthesis factory, research and development center, and production management. As a professional manufacturer of chemical foaming agents, calcium zinc stabilizers, WPC wood plastic lubricants, and special additives.

Our Featured Products

More than a premium raw material supplier, we excel in foaming and wood-plastic core technologies, offering world-class foaming agents, calcium-zinc stabilizers, lubricants, and customized technical solutions.

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R&D & Technology

With large-scale R&D facilities and multi-level R&D platforms, sustained substantial R&D investment, a highly educated team, and industry-academia-research cooperation with universities.

Second Factory

Second Factory

  • 1600M²

    R&D site area

  • 11+Million USD

    6-year R&D investment

  • 20+Person

    Highly educated R&D team

  • 34

    Patents

Applications & Solutions
News
Releases

Stay updated on our latest corporate news, milestones, and exhibition insights—get details on participation, highlights, and on-site coverage to understand our strategic initiatives in real time.

Oct 152026
Joysun Recognized as a Specialized and Innovative “Little Giant” Enterprise

Joysun has been recognized as a specialized and innovative “Little Giant” enterprise. We will continue to advance materials and additives through product development, quality management and application support.

Sep 302026
What PVC Flame Retardant Is Suitable for Ventilation Window Profiles?

For manufacturers of PVC ventilation windows, selecting a suitable PVC Flame Retardant is not simply a matter of achieving a higher fire rating. Ventilation window profiles and blind slats require a c

Sep 252026
Why Does a Foaming Agent Decompose Too Early During Automotive PP Molding?

As automotive manufacturers continue to reduce vehicle weight without sacrificing part performance, chemical foaming has become an important approach for lightweight PP injection molded components. By

Sep 182026
How to Improve Flame Retardancy in Flexible PVC Without Affecting Transparency?

As demand grows for safer transparent films, flexible sheets, crystal fabrics, and light-box fabrics, PVC manufacturers face a formulation challenge that is more complex than simply increasing the fla

Sep 112026
What Are the Different Types of Flame Retardants for Plastics?

As plastic materials are increasingly used in construction products, electrical components, transportation systems, wall panels, profiles, pipes, and other applications, flame performance has become a

Sep 042026
How to Choose the Right 3D Printing Foaming Agent for PLA Filament Production

Why Foaming Agent Selection Matters in 3D Printing With the rapid development of lightweight manufacturing and additive manufacturing technologies, foamed PLA filament has become an important material

Aug 282026
How to Improve PE WPC Extrusion with the Right Composite Lubricant?

PE wood-plastic composite (WPC) extrusion combines polyethylene resin with a high proportion of wood flour or other lignocellulosic fillers. This formulation can reduce material cost and provide a nat

Aug 202026
What Factors Should Be Considered When Selecting a TPEE Supplier?

1. Understanding Your TPEE Material Requirements Before Choosing a Supplier Selecting the right TPEE Supplier is not only about comparing prices. The first step is understanding the specific material

Aug 142026
How to Choose the Right PVC Flooring Stabilizer for Your Manufacturing Process?

The quality and performance of PVC flooring products largely depend on the stability of the formulation during processing. As PVC materials require high-temperature extrusion, improper stabilization c

Aug 072026
How to Choose a Reliable SPC Flooring Stabilizer Manufacturer for Your Flooring Business

The rapid growth of SPC (Stone Plastic Composite) flooring has increased demand for high-performance additives that can improve processing stability, product consistency, and long-term flooring perfor

Jul 312026
Uniform Cell Structure Explained: Why It Matters for High-Performance IXPP Foaming Agents

Foam engineers rarely get a support call because a part is "too foamy." They get the call because the foam looks inconsistent — dense in one spot, coarse in another, with a surface that telegrap

Jul 242026
What Are PVC Flame Retardant Additives and How Do They Work?

Fire performance has become one of the first questions building material buyers and profile manufacturers ask before placing an order. Whether the end product is a window profile or a drainage pipe, a

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