Introduction
WEIHAI RISING SUN FILTER CO., LTD. (Chinese: 威海旭日过滤器股份有限公司) is a Chinese industrial company based in Weihai, Shandong Province, specializing in melt filtration equipment and related components for the plastics and synthetic fiber industries. Its business covers the development, production, and sale of melt filters, melt pipelines, nonwoven materials, film-related filtration systems, chemical fiber accessories, and associated machinery, as well as certain medical device activities and import-export trade.
The company positions itself as a long-established filtration specialist serving polymer processing and film extrusion, with a reported origin in 1997 and a formal corporate establishment date of 2002. Its technical profile emphasizes high-efficiency precision filtration and non-stop screen-changing technology, both of which are important in continuous plastics processing where pressure stability, contamination control, and reduced downtime directly affect product quality and line productivity.
History and Development
Weihai Rising Sun Filter traces its roots to 1997, when it began producing melt filtration equipment in Weihai, and it later formalized its corporate structure in 2002. The company states that it initially focused on chemical fiber filtration before shifting in 2002 toward film filtration applications, reflecting a broader move from fiber processing into downstream polymer film markets.
Two milestones stand out in its development:
- Early specialization in melt filtration: the company describes itself as one of the earlier melt-filter equipment producers registered in Weihai, with an early emphasis on chemical fiber applications.
- Transition into film extrusion filtration: by 2002, it had shifted into film-sector filtration, a market that typically requires tighter melt cleanliness and more stable operating conditions.
- Recognition as a specialized SME: it was listed as a provincial-level “specialized, refined, distinctive, and innovative” small and medium-sized enterprise in 2019, indicating official recognition of technical specialization.
More recently, Weihai municipal industrial policy documents identified the company as having an enterprise-level R&D center focused on high-efficiency precision filtration for melt filters and non-stop screen-changing technology, suggesting continued investment in process innovation.
Business Operations and Segments
The company’s disclosed business scope spans several adjacent industrial categories, rather than a single narrow product line. Its main activities include:
- Melt filtration equipment
- Melt pipelines
- Chemical fiber accessories
- Machinery and equipment parts
- Nonwoven fabrics and films
- Polymer raw materials and recycled raw materials sales
- Medical device production and sales in first- and second-class categories
- Trade and export activities
On exhibition and supplier platforms, the company is presented as offering a broad catalog of filtration-related products and industrial components, and a ChinaPlas supplier listing indicates 14 product categories and 4 applications associated with the company. That profile is consistent with a specialized equipment supplier serving multiple polymer-processing lines rather than a commodity manufacturer.
Products and Technologies
The company’s core product area is melt filtration, which is used to remove contaminants from molten polymers before shaping operations such as film casting, extrusion, or fiber spinning. In plastics manufacturing, these systems are important for protecting downstream equipment, stabilizing pressure, and improving final product quality.
Main technology areas
- Melt filters for polymer and chemical fiber lines
- Melt pipelines that carry viscous polymer streams under controlled temperature and pressure conditions
- Non-stop screen-changing technology, designed to maintain filtration while reducing or eliminating shutdowns for screen replacement
- Precision filtration systems aimed at high-efficiency particle removal in continuous production environments
The company’s own materials describe filtration as a system in which both internal and external components work together to achieve efficient, safe, controllable, and user-friendly performance. In practical terms, this suggests emphasis on mechanical integrity, pressure control, and maintainability rather than only on the filter housing itself.
Technical relevance in plastics processing
Its products are relevant to applications that require stable melt quality, including:
- BOPET, BOPP, BOPA, and BOPI film lines
- Blown film equipment
- CPP and cast film lines
- Barrier and moisture-proof films
- Solar-cell encapsulation films
- Backsheet composite films
- Capacitor films
- Battery separator films
- Electrical insulation films
These applications are filtration-sensitive because even small contamination levels can affect optical properties, electrical performance, mechanical strength, or line uptime.
Applications and End Markets
The company serves a set of downstream plastics and adjacent industrial markets, with its strongest disclosed presence in film extrusion and chemical fiber processing.
| End market | Typical use of the company’s products |
|---|---|
| Polymer film | Melt purification and stable extrusion for BOPP, BOPET, BOPA, and related film grades |
| Chemical fiber | Filtration of polymer melts used in fiber spinning and related processes |
| Nonwoven materials | Supporting filtration and processing equipment for nonwoven production |
| Industrial and medical materials | Broader use in controlled-material and device-related manufacturing |
The ChinaPlas listing and exhibitor materials indicate that the company participates in the plastics industry as a supplier of filtration technologies rather than a resin producer or film converter.
Global Presence and Market Position
Weihai Rising Sun Filter is headquartered in Weihai Economic and Technological Development Zone, Shandong, and its disclosed operations remain centered in China. Its public-facing materials show participation in ChinaPlas, one of the major plastics and rubber industry exhibitions, which indicates engagement with domestic and international buyers in the polymer-processing equipment market.
The company has not publicly disclosed global sales figures or market share in the available sources. However, its inclusion in official and exhibition-related listings, together with its product focus, suggests a role as a specialized niche supplier within China’s polymer-processing equipment sector rather than a large diversified multinational.
Sustainability and Environmental Initiatives
Available sources show two sustainability-related signals. First, the company was included in Weihai’s 2026 green manufacturing list, indicating that local authorities recognized it within a green manufacturing framework. Second, municipal records also listed it in 2025 among enterprises with an “industrial enterprise R&D center” designation and in 2025 district-level “mu yield” performance evaluation records, suggesting that it is monitored within broader industrial upgrading and efficiency policy systems.
The available sources do not provide detailed information on emissions reductions, recycled-content usage, or lifecycle assessments. Based on its product line, its environmental relevance is likely tied to process efficiency, reduced downtime, and material-loss reduction in plastics processing, but that inference is not directly quantified in the sources.
Financial Performance and Economic Impact
No public financial statements, revenue figures, or profit data were found in the supplied sources. The company is described in one registry-style source as a non-listed joint-stock company controlled by natural persons, which is consistent with a privately held industrial enterprise.
Its economic impact appears to be concentrated in:
- specialized manufacturing employment
- local industrial supply chains in Weihai
- support for downstream film, fiber, and nonwoven production
- technology upgrading in precision filtration equipment
Leadership and Corporate Governance
Public registry information identifies Wu Menglong as the company’s legal representative. Beyond that, the available sources do not provide a detailed board structure, management team, or ownership breakdown. The company’s legal and corporate form is listed as a joint-stock company not publicly listed, controlled by natural persons.
Innovations and Future Outlook
The strongest innovation signal in the available record is the company’s focus on high-efficiency precision filtration and non-stop screen-changing technology. In plastics processing, these capabilities are commercially important because they can help operators maintain throughput, reduce scrap, and improve product consistency.
The company’s future prospects are likely linked to several industry trends:
- Higher quality requirements in film packaging and functional films
- Growth in battery, electronics, and solar-related polymer materials
- Demand for higher uptime and lower maintenance in continuous extrusion lines
- Ongoing pressure to improve resource efficiency in manufacturing
Its participation in exhibition platforms and its recognition as a specialized SME suggest a strategy built around technical depth and application-specific engineering, rather than volume manufacturing alone.
Summary
WEIHAI RISING SUN FILTER CO., LTD. is a Weihai-based Chinese manufacturer focused on melt filtration systems for plastics, chemical fiber, and film processing. Its development history shows a shift from chemical fiber filtration to broader film-sector applications, supported by technical specialization in precision filtration and non-stop screen-changing systems. The company occupies a niche but technically important position in the plastics ecosystem, where filtration quality directly affects product performance and process efficiency.
References
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CPS+ eMarketplace. (n.d.). WEIHAI RISING SUN FILTER CO., LTD.WEIHAI RISING SUN FILTER CO., LTD.. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1016028Link