The Uniseel 38/400 Gold Unishell Cap is designed for premium brands that require both superior safety and a sophisticated shelf presence. Crafted from high-grade Tinplate (TP), this closure features a brilliant luxury gold finish that elevates the perceived value of your health and beauty products. Engineered with a seamless, straight-sided Unishell design, it eliminates visible threads for a clean, professional look that perfectly matches clear, amber, or frosted PET jars.
Our 100% automated manufacturing process ensures that every Gold Unishell Cap adheres to the exact GPI 38/400 technical standard. For global brands in the US, Europe, and beyond, this provides consistent torque performance and reliable sealing, specifically optimized for the unique requirements of PET plastic packaging.
High-precision tolerance control ensures an airtight fit for the diverse range of PET jars used in the pharmaceutical and nutraceutical sectors.
| Parameter | Specification Detail |
| Neck Finish Standard | GPI 38/400 |
| Inner Diameter | 38.0mm (Nominal) |
| Material | High-Grade Recyclable Tinplate (TP) |
| Surface Finish | Luxury Gold Protective Coating (FDA Compliant) |
| Compatibility | PET, HDPE, and PP Plastic Jars |
Uniseel prioritizes health and safety through rigorous testing. Our Gold Tinplate Unishell Caps are fully certified by SGS laboratories, meeting all global regulatory requirements.
●US FDA 21 CFR 175.300: Passed. Total extractives testing confirms zero harmful migration for food-grade packaging.
●REACH SVHC Compliance: Passed. Verified free from all 253 Substances of Very High Concern per ECHA standards.
●EU RoHS Directive: Passed. Guaranteed free from restricted hazardous substances such as Lead and Mercury.
●Heavy Metal Safety: Strict material screening ensures no heavy metal contamination in the tinplate or coating.
We offer two industry-leading liner options, both of which have fully cleared all SGS laboratory testing for Food Contact Materials (FCM).
A. Aluminum Foil Induction Heat Seal (IHS) Liner
The definitive choice for tamper evidence and maximum moisture barrier protection on PET containers.
●Fully Certified: BPA-Free and PAA-Free.
●Sensory Neutral: Preserves the original potency and aroma of your content.
B. PS22 Pressure Sensitive Liner
The efficient, tool-free sealing solution for dry powders, capsules, and health supplements.
●Passed: MPPO Overall Migration and Heavy Metal Screening.
●Certified Safety: Completely free from BPA and Bisphenols.
Our production facility operates an ISO Class 7 Cleanroom, ensuring the highest level of hygiene for your sensitive products.
●Daily Capacity: Massive 250,000 units per day.
●Lead Time: Generally 21 to 35 days, providing reliable supply chain support.
●Global Reach: Serving major markets in the US, Europe, and Latin America.
Differentiate your brand with our precision 3D Embossed Logo service on the gold tinplate surface. Our customization options provide a premium, tactile feel that enhances brand recognition on the shelf.
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. With over thirty years of deep-rooted expertise in cap manufacturing since the 1990s, we have established ourselves as a trusted global leader in precision sealing solutions.
R&D Excellence and Quality Assurance
Equipped with advanced production facilities and an ISO Class 7 (Class 10,000) cleanroom, we hold dozens of patented technologies. Our ISO9001 certified quality management system ensures every product meets pharmaceutical-grade standards.
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 luxury coatings like our gold finish.
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 PET or HDPE bottle that adheres to this standard. We recommend providing your bottle samples for a professional fit-test in our lab.
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, allowing you to add a unique, premium tactile branding element 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. For maximum moisture protection and tamper evidence, we recommend the IHS liner.
Q5: What is your minimum order quantity (MOQ) for custom gold finishes?
A5: For our standard luxury gold, MOQs are flexible. For brand-specific custom gold matching, the MOQ typically starts at 50,000 units to ensure coating consistency across the automated line.
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