The Uniseel 38/400 Silver Unishell Cap is the premier choice for brands utilizing high-quality glass bottle packaging. Crafted from premium-grade Tinplate (TP), these closures offer exceptional structural integrity and a refined, seamless aesthetic that perfectly complements the clarity and weight of glass. Designed with high-precision internal threading, the Unishell cap provides a robust, airtight seal that protects sensitive pharmaceutical and nutraceutical contents from moisture and oxidation.
Our 100% automated manufacturing process ensures that every cap meets the rigorous GPI 38/400 standard. For premium glass bottle users, this means consistent torque performance and a flawless fit, even at high filling speeds. Whether for health supplements, specialty chemicals, or premium oils, the Uniseel Silver Unishell Cap delivers the safety and luxury finish your brand deserves.
Optimized for a perfect interface with glass neck finishes, our 38/400 series follows strict tolerance controls.
| Parameter | Specification Detail |
| Neck Finish Standard | GPI 38/400 |
| Inner Diameter | 38.0mm (Nominal) |
| Material | High-Grade Recyclable Tinplate (TP) |
| Surface Finish | Premium Silver Protective Coating |
| Primary Compatibility | Glass Pharmaceutical & Nutraceutical Bottles |
Safety is our absolute priority. Our Silver Tinplate Unishell Caps have successfully cleared extensive SGS laboratory testing to meet the stringent requirements of the US and EU markets.
●US FDA 21 CFR 175.300: Passed. Confirmed zero harmful migration under simulated food and drug contact.
●REACH SVHC Compliance: Passed. Verified free from all 253 Substances of Very High Concern.
●EU RoHS Directive: Passed. Guaranteed free from Lead, Mercury, and Cadmium.
●Heavy Metal Safety: Strict batch testing ensures zero contamination in the tinplate material.
For glass packaging, a reliable seal is critical. Our liners have fully passed and cleared all SGS laboratory testing for Food Contact Materials (FCM).
A. Aluminum Foil Induction Heat Seal (IHS) Liner
Perfect for glass containers requiring a permanent, tamper-evident seal.
●Fully Certified: BPA-Free and PAA-Free.
●Sensory Neutral: Preserves the original aroma and taste of your glass-packed product.
B. PS22 Pressure Sensitive Liner
Ideally suited for glass jars containing capsules, tablets, or dry powders.
●Passed: MPPO Overall Migration and Heavy Metal Screening.
●Certified Safety: Completely free from BPA and Primary Aromatic Amines (PAA).
Our Hangzhou facility operates an ISO Class 7 Cleanroom, ensuring the highest level of hygiene for your glass packaging closures.
●Daily Capacity: 250,000 units per day.
●Lead Time: Generally 21 to 35 days.
●Global Reach: Dedicated support for Europe, the US, and worldwide markets.
Distinguish your premium glass bottles with our precision 3D Embossed Logo service on the tinplate surface. Our customization options allow you to elevate your brand identity with tactile sophistication and unique color-matching (Blue, Brown, White, Black).
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. Since the 1990s, we have been a dedicated leader in the cap manufacturing industry, accumulating over thirty years of expertise in high-precision sealing solutions.
R&D Excellence and Quality Assurance
Equipped with advanced production facilities and an ISO Class 7 (Class 10,000) cleanroom, our company holds dozens of patented technologies. Our stringent quality management system is ISO9001 certified, ensuring every product meets pharmaceutical-grade requirements.
Our Corporate Slogan: Unified Quality, Sealed for Safety.
At Uniseel, we believe a cap 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.
Q1: What are the primary advantages of Tinplate over Aluminum for Unishell caps?
A1: Tinplate offers superior structural rigidity and dent resistance compared to aluminum. This ensures that the cap maintains its seamless, straight-sided aesthetic even during bulk shipping and handling. Additionally, tinplate provides excellent compatibility with various lacquers and coatings, ensuring long-term corrosion resistance.
Q2: Are these caps compatible with all 38/400 neck finish bottles?
A2: Our caps are manufactured to the strict GPI 38/400 standard. They are fully compatible with any glass or plastic (PET/HDPE) bottle that adheres to this standard.
Q3: Can I get a custom embossed logo on a 38/400 cap?
A3: Yes, we specialize in high-definition 3D logo embossing. Custom tooling is required for your design. Once the tool is created, we can produce caps with your unique branding, adding a premium tactile feel to your packaging.
Q4: Which liner should I choose for my health supplement capsules?
A4: For dry products like capsules or tablets, the PS22 Pressure Sensitive liner is a cost-effective and efficient choice as it doesn't require induction sealing machinery. For maximum moisture protection and tamper evidence, we recommend the Aluminum Foil Induction Heat Seal (IHS) liner.
Q5: What is your minimum order quantity (MOQ) for custom colors?
A5: For standard Silver or Gold, our MOQs are flexible. For custom color matching (e.g., matte black or brand-specific blue), the MOQ typically starts at 50,000 units to ensure color consistency across the automated coating line.
You Might Also Like
EN
