Introduction
Yantai Yongsheng Sealing Technology Co., Ltd. (烟台市永盛密封科技有限公司) is a Chinese manufacturer specializing in bottle-cap sealing liners, gaskets, and related packaging seal materials for the plastics and packaging industry. Founded in 1989 and based in the Hi-Tech Zone of Yantai, Shandong, the company positions itself as a research, production, and service-oriented enterprise focused on sealing solutions for closures used across beverage, food, cosmetic, pharmaceutical, and industrial packaging.
The company’s product portfolio has expanded from an initial single-paperboard gasket line into multiple families, including EPE foam liners, induction aluminum foil seals, vented liners, multi-layer co-extruded composite liners, and adhesive-backed sealing components. Company materials also describe offerings such as anti-counterfeit QR-code liner systems and roll materials for sealing applications, indicating a business model centered on customized closure-seal solutions rather than commodity packaging alone.
In industry terms, Yongsheng sits at the interface of plastics processing, packaging materials engineering, and cap-closure performance, where liner design affects barrier properties, leak prevention, induction sealing, and product shelf life. Chinese industry listings and public recognition programs describe the company as a technology-driven specialist, including designation as a “Shining Niche” enterprise on ChinaPlas exhibitor information and inclusion in municipal and provincial innovation-related programs.
History and Development
Yongsheng states that it was established in 1989, giving it a long operating history in sealing materials and closure-related packaging components. Public company descriptions indicate that it later evolved from a single-product supplier into a broader liner manufacturer with a multi-category product structure.
A notable development milestone was the company’s growth into a technology-oriented manufacturer with a reported 21 patents, including 3 invention patents, according to company information. This suggests a steady emphasis on process development and product engineering, which is important in liner materials where performance characteristics such as sealing reliability, puncture resistance, and compatibility with different container substrates are commercially significant.
A further milestone is the company’s recognition in local innovation and specialization programs. It appears in Yantai and Shandong public lists related to technology-based small and medium-sized enterprises, gazelle enterprises, and proposed or recommended specialized and innovative enterprise programs. These listings indicate that the firm is viewed by local authorities as an advanced manufacturing or technology-based business rather than a standard trading intermediary.
Business Operations and Segments
Yongsheng describes itself as a high-tech enterprise engaged in research and development, production, and service for sealing gaskets and liner materials. Its business is concentrated in packaging-related sealing products rather than broader polymer conversion.
Core operating characteristics
- Headquarters and site: Xiejiazhuang Industrial Park, Hi-Tech Zone, Yantai City, Shandong Province.
- Factory area: about 12,000 square meters in company materials, with third-party platform data also describing a factory footprint in the 10,000–30,000 square meter range.
- Workforce: more than 120 employees, with R&D personnel above 15% of the workforce, according to company information.
- Production capacity: third-party platform listings describe multiple production lines and high output volumes for foam liners and aluminum foil seals.
The company’s operational profile suggests a combination of standardized mass production and customized order fulfillment. Such a structure is common in packaging components markets, where customers require tailored dimensions, materials, printing, and seal performance for specific container systems.
Products and Technologies
Yongsheng’s product portfolio centers on closure-sealing liners used with plastic, glass, and composite containers. Its principal product families include:
| Product family | Typical function | Technical relevance |
|---|---|---|
| EPE foam seal liners | Cushioning and sealing inside caps | Suitable for general bottle and jar closures; adaptable to custom diameters and thicknesses. |
| Induction aluminum foil seals | Heat/induction sealing for tamper evidence and barrier performance | Used in PE, PP, PET, and glass packaging; supports leak resistance and product protection. |
| Vented liners | Controlled pressure equalization | Relevant for packaging that must release or manage internal pressure while maintaining protection. |
| Composite and multi-layer liners | Combined barrier and mechanical properties | Useful where chemical resistance, moisture barrier, or high sealing reliability is needed. |
| Printed and coded liners | Brand identification and anti-counterfeit functions | Supports traceability and packaging authentication. |
Company and marketplace listings show products such as lift-and-peel induction seal liners, printed induction seal liners, food-grade EPE foam sealing gaskets, and pressure-sensitive seal liners. These offerings indicate capability in both die-cut liner conversion and laminated barrier structures, with materials ranging from EPE foam to aluminum foil composites.
Technical descriptions from product pages point to customization in thickness, diameter, shape, printing, and die-cut design. For packaging users, these details matter because liner performance depends on the interaction among cap torque, container mouth geometry, closure material, induction energy, and the target product’s chemical and physical properties.
Applications and End Markets
Yongsheng’s products are used in the packaging and printing segment, especially in closures for bottles and jars. The company’s product listings indicate application across several end markets:
- Food and beverage packaging, where sealing integrity and food-contact considerations are important.
- Cosmetics and personal care, where induction seals and peelable liners are used for product protection and tamper evidence.
- Household and industrial chemicals, where barrier and leakage prevention are critical.
- Pharmaceutical and health-related containers, where closure reliability and anti-counterfeit features may matter.
The company’s own materials and product listings suggest compatibility with container substrates such as PE, PP, PET, and glass. This broad compatibility is important because closure liner selection in packaging often depends on both the container resin and the product’s fill characteristics.
Global Presence and Market Position
Yongsheng appears to operate as an export-oriented specialist supplier, with third-party profile data indicating overseas sales activity and an export ratio in the 21%–30% range in one marketplace profile. Trade-data aggregations also indicate recorded export shipments, although these public records are limited and do not establish a complete picture of global sales scale.
The company participates in international B2B channels, including ChinaPlas exhibitor listings and major manufacturing marketplaces, which is typical for Chinese packaging-component suppliers serving customers outside their domestic region. Public marketplace pages also suggest that Yongsheng markets products with custom order acceptance, OEM support, and relatively short lead times for some items, which supports its positioning in flexible, specification-driven packaging supply chains.
Sustainability and Environmental Initiatives
Publicly available material on Yongsheng emphasizes product engineering, quality control, and application performance more than formal sustainability reporting. However, some of its products, such as eco-friendly aluminum foil seal liners, indicate a market response to packaging efficiency and material performance expectations.
In the broader plastics industry, seal-liner suppliers are increasingly affected by trends toward recyclability, material reduction, and closure-package compatibility. For Yongsheng, these trends likely influence product development toward thinner structures, improved seal efficiency, and liner systems that can work with evolving packaging designs. The company’s public disclosures available here do not provide enough detail to assess formal environmental targets, emissions data, or circular-economy programs.
Financial Performance and Economic Impact
Yongsheng states that it achieved sales revenue of about RMB 100 million in 2020. Marketplace profiles also describe annual output value and substantial daily or monthly production capacities for selected products, though such figures are platform-reported rather than audited financial statements.
The company’s economic role is concentrated in the regional manufacturing base of Yantai, Shandong, where it contributes to employment, industrial upgrading, and supply-chain support for packaging manufacturers and downstream brand owners. Its inclusion in local innovation and industrial upgrading programs suggests that it is recognized as a contributor to the area’s advanced manufacturing ecosystem.
Leadership and Corporate Governance
Public sources identify a management structure oriented toward specialized sales, export, and product development rather than a publicly listed corporate governance model. Available materials also indicate that the company is privately held.
Specific executive or managerial names appear on professional networking pages, including personnel associated with overseas sales and export management. However, the public record provided here is insufficient to reconstruct a full board or formal governance structure with confidence.
Innovations and Future Outlook
Yongsheng’s strongest innovation signals are its reported patent portfolio, its municipal one-enterprise-one-technology R&D recognition, and product development focused on seal performance, anti-counterfeit coding, and water-vapor venting. These areas are commercially important because closure liners must increasingly address not only leakage prevention but also traceability, product integrity, and compatibility with diversified packaging formats.
Recent public project notices also show the company associated with equipment upgrades and technical transformation in 2026, which suggests ongoing reinvestment in production capability. In the near term, the company’s prospects will likely depend on its ability to expand customized liner solutions, support export demand, and adapt to packaging requirements driven by tighter quality, safety, and sustainability expectations in the global plastics and packaging sectors.
Summary
Yantai Yongsheng Sealing Technology Co., Ltd. is a long-established Yantai-based specialist in seal liners and gasket materials for bottle and jar packaging. Its business combines plastics-related processing, packaging engineering, export-oriented manufacturing, and incremental product innovation, with particular strength in EPE foam liners and induction aluminum foil seals.
References
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CPS+ eMarketplace. (n.d.). YANTAI YONGSHENG SEALING TECHNOLOGY CO.,LTD.YANTAI YONGSHENG SEALING TECHNOLOGY CO.,LTD.. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1023617Link