The Uniseel 38/400 Silver Unishell Cap represents the pinnacle of high-performance sealing, specifically engineered for the pharmaceutical, nutraceutical, and premium health industries. Unlike multi-part closures, our Unishell design is crafted from high-quality Tinplate (TP), offering superior structural integrity and a seamless, straight-sided aesthetic. This robust material choice provides enhanced protection against impact and environmental factors compared to standard aluminum options.
Our manufacturing process utilizes 100% automated stamping and threading lines within a strictly controlled environment. This advanced automation guarantees that every cap adheres to the precise GPI 38/400 standard with zero mechanical deviation. For global brands in the US, Europe, and beyond, this ensures seamless integration with high-speed automated filling lines, eliminating risks of cross-threading or vacuum failure during the capping process.
Strict tolerance controls are applied to our Tinplate Unishell Caps to ensure an airtight fit for both PET and Glass jars.
| Parameter | Specification Detail |
| Neck Finish Standard | GPI 38/400 |
| Inner Diameter | 38.0mm (Nominal) |
| Material | High-Grade Recyclable Tinplate (TP) |
| Surface Treatment | FDA-Compliant Silver Protective Coating |
| Compatibility | PET Jars, Glass Bottles, HDPE Containers |
Uniseel prioritizes consumer safety and international regulatory compliance. Our Silver Tinplate Unishell Caps have successfully passed a comprehensive battery of tests at SGS laboratories, ensuring they are safe for global distribution, including the stringent EU and US markets.
●US FDA 21 CFR 175.300: Passed. Total extractives testing confirms zero harmful migration under simulated food contact conditions.
●REACH SVHC Compliance: Passed. Verified free from 253 Substances of Very High Concern (SVHC), meeting ECHA's highest safety standards.
●EU RoHS Directive: Passed. Guaranteed free from Lead, Mercury, Cadmium, and other restricted hazardous substances.
●Heavy Metal Safety: Comprehensive batch testing confirms no heavy metal contamination in the tinplate or coating.
A closure is only as reliable as its internal seal. We offer two industry-leading liner options, both of which have now fully passed and cleared all SGS laboratory testing for Food Contact Materials (FCM) and chemical safety.
A. Aluminum Foil Induction Heat Seal (IHS) Liner
Optimized for maximum shelf-life and tamper evidence, our IHS liners have passed the 40°C/10-day migration simulation and sensory testing.
●Fully Certified: BPA-Free and PAA-Free.
●Sensory Neutral: Guaranteed to maintain the original aroma and taste of the content.
B. PS22 Pressure Sensitive Liner
The ideal solution for dry pharmaceuticals and superfoods. Our PS22 liners have now successfully cleared all SGS tests for MPPO Migration, PAA, and Bisphenols.
●Passed: MPPO Overall Migration and Heavy Metal Screening.
●Certified Safety: Completely free from BPA and Primary Aromatic Amines (PAA).
Our state-of-the-art facility in Hangzhou is a center of excellence for closure manufacturing. By operating an ISO Class 7 Cleanroom (Class 10,000 equivalent), we maintain a sterile environment that is critical for pharmaceutical-grade packaging.
●Daily Capacity: Massive 250,000 unit output per day to support high-volume global demand.
●Lead Time: Typically 21 to 35 days, with flexibility to align with urgent project schedules.
●Global Reach: Full logistics support for customers in Europe, North America, and worldwide. Expertise in international trade documentation (EORI/RUT/Customs).
Elevate your brand identity with our precision customization services. We specialize in high-definition 3D Embossed Logos on the tinplate surface, providing a tactile and visual premium feel that differentiates your product on the shelf. Combined with custom color matching (Blue, Brown, White, Black), the Unishell Cap becomes a powerful extension of your brand.
Our History: Over 30 Years of Packaging Expertise
Hangzhou Uniseel Technology Co., Ltd. is the specialized foreign-trade subsidiary of Hangzhou Lin'an Shengxiang Technology Co., Ltd. Located in the strategic industrial hub of Lin'an District, Hangzhou, Zhejiang Province, our company has been a dedicated pillar of the global packaging industry since the 1990s. With over thirty years of deep-rooted expertise in cap manufacturing, we have accumulated a wealth of industry knowledge that allows us to solve even the most complex sealing challenges for our global partners.
Our Specialization: A Comprehensive Closure Ecosystem
We specialize in the high-precision manufacturing of both Tinplate and Aluminum caps. Our extensive product portfolio includes dedicated solutions for health supplements, pharmaceuticals, high-end spirits, and luxury perfumes. Beyond our core cap offerings, we provide integrated one-stop solutions, including high-quality glass bottles, PET plastic bottles, custom cap liners, silicone stoppers, and a range of precision silicone products. This comprehensive approach ensures that our clients receive a perfectly matched packaging system every time.
R&D Excellence and Quality Assurance
Equipped with a professional R&D and design team, we stay at the forefront of packaging technology. Our advanced production facilities feature an ISO Class 7 (Class 10,000) cleanroom, ensuring the highest hygiene standards for pharmaceutical-grade production. This commitment to innovation has earned us dozens of patented technologies. Our stringent quality management system is ISO9001 certified, ensuring that every product leaving our facility meets the most demanding global standards.
Our Corporate Slogan: Unified Quality, Sealed for Safety.
At Uniseel, our vision is to be the world's most trusted partner in protective packaging. We believe that a cap is more than just a cover—it is the final guardian of your product's integrity. Our mission is to provide global brands with reliable, aesthetically superior, and legally compliant sealing solutions that protect consumer health and elevate brand value.
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