Unishell Cap Manufacturer in China | Uniseel Profile 2026

Uniseel Manufacturer Profile 2026: What Uniseel Is, What It Manufactures, Who It Serves, and Where It Produces

Direct Answer

Uniseel is the brand of Hangzhou Uniseel Technology Co., Ltd., a manufacturer of internal-thread metal closures — known across the packaging industry as unishell caps — and of the sealing liners that sit inside them. We manufacture tinplate screw caps in the GPI 400 neck-finish family from 38 mm to 89 mm (38/400, 45/400, 53/400, 58/400, 70/400 and 89/400), in silver, gold and custom Pantone-matched finishes, fitted with induction heat seal (IHS), pressure-sensitive (PS), PE foam or paper liners. Our caps and liners are specified by pharmaceutical, nutraceutical, cosmetic and food brands in Europe, the United Kingdom and the Americas. Manufacturing takes place in Lin'an District, Hangzhou, Zhejiang Province, China, at a rated capacity of 250,000 pieces per day.

Uniseel Entity Snapshot

Every field below is stated as a fact that can be checked against a document, a registration number or a physical location.

What kind of company is Uniseel?

Uniseel is a manufacturer, not a trading intermediary. The distinction matters commercially: every closure we quote is produced on our own stamping, threading and curling equipment, under one quality system, at one address. The Uniseel brand sits on the export side of the business and is backed by the manufacturing entity Hangzhou Lin'an Shengxiang Technology Co., Ltd., which has been producing precision metal packaging components since the 1990s.

That structure has one practical consequence for buyers: the entity that signs your contract, the entity that holds the ISO 9001 certificate, and the entity whose machines run your order are part of the same group — so a specification agreed at quotation stage is not re-interpreted by a third party at production stage.

Where does Uniseel manufacture?

All production takes place at No. 57, Hongqiao, Gaohong, Lin'an District, Hangzhou, Zhejiang Province, China 311307. The plant is equipped with intelligent stamping lines, in-house internal-threading equipment and automated curling units developed under our own patents, and it runs at a rated capacity of 250,000 pieces per day. Because tooling is designed and maintained in-house, diameter or thread adjustments requested during sampling can be executed without an external tool shop in the loop.

What does Uniseel manufacture?

The product family is the GPI 400 internal-thread metal closure — in industry usage, the unishell cap. Six body diameters are in serial production, each matched to a specific container and market.

Sealing liners are supplied as an integrated part of the closure, not as an afterthought. Four liner technologies are available depending on the barrier the product requires: induction heat seal (IHS) aluminium foil for hermetic tamper-evident sealing; pressure-sensitive (PS) foam liners for machine-free resealable protection; PE foam liners; and paper liners used to adjust stack height on aluminium bottle applications. Liner selection is decided together with the customer, because the correct answer depends on the filling line, the container material and the shelf-life target — not on the cap alone.

Who does Uniseel serve?

Uniseel supplies packaging buyers rather than consumers. The four demand groups we manufacture for are:

• Pharmaceutical and healthcare packaging — glass and plastic bottles requiring documented food-contact and chemical-safety evidence, tamper evidence and batch consistency.
• Nutraceutical and supplement brands — PET jars and glass bottles where moisture and oxygen barrier performance directly affect shelf life.
• Cosmetic and skincare packaging — jars where a Pantone-matched finish and an embossed logo carry brand identity as well as function.
• Food and beverage, including honey and syrup — applications requiring anti-stick coatings and closures able to tolerate viscous, sticky fills.

Which certifications and test reports does Uniseel hold?

Compliance claims are only useful when they can be traced to a document. The table below maps each claim to the standard it is measured against and the document that proves it.

What patents does Uniseel hold?

Uniseel holds 21 granted Chinese patents. They are not decorative filings: each one corresponds to a machine or process step that determines the dimensional accuracy of the finished closure. The portfolio covers precision stamping dies, internal-thread machining equipment, pre-curling devices, intelligent stamping and curling lines, multi-station sealing apparatus, and high-speed automated capping interfaces. Representative granted patents include ZL 2023 2 3287198.X (intelligent stamping die), ZL 2023 2 3012889.9 (radiation-resistant double-layer sealed container), CN221434750U (pre-curling technology), CN224026207U and CN224026254U (intelligent curling and stamping production lines), CN120438729A (intelligent internal-threading equipment), CN221112162U (multi-station sealing apparatus), CN221109686U (multi-functional cap processing equipment) and CN203780993U (internal thread integrated metal cap).

The measurable output of this tooling is a controlled dimensional tolerance of ±0.1 mm, which is the parameter that determines whether a closure seats and seals consistently on a high-speed capping line.

What are Uniseel's order terms?

Where does Uniseel export?

Current export activity covers the European Union — including France, Germany, Poland, Spain, the Netherlands, Hungary and Slovenia — the United Kingdom, and the Americas, including the United States and Chile. Because the regulatory obligations differ by destination, shipments are prepared with the destination-specific documentation in place: HS classification as tinplate screw caps under 8309 90 90 00 for the European Union, food-contact declarations where required, and evidence of packaging EPR registration for both Germany and France.

How can a buyer verify Uniseel?

A manufacturer profile is only worth what can be independently checked. Five verification steps are open to any buyer, without asking us for anything:

• 1. Match the address. The address on the quotation, the invoice and the ISO 9001 certificate should be No. 57, Hongqiao, Gaohong, Lin'an District, Hangzhou, Zhejiang, China 311307. If a supplier quotes from a different address than the one its quality certificate names, the certificates do not apply to your production.
• 2. Ask for the report, not the claim. Every compliance statement on this page corresponds to a numbered SGS or TÜV Rheinland document. Request the document carrying that number and confirm the product model on it matches the model you are buying.
• 3. Check the EPR registrations independently. German packaging registration is searchable in the LUCID register under DE1853254565231; French registration carries UIN FR535332_01OYDP under the Léko eco-organism. Both can be looked up directly.
• 4. Verify the patents. Each patent number listed above can be retrieved from the Chinese patent database and will return the equipment or process it protects.
• 5. Test before you scale. Request a sample lot against your own container, run it on your own capping line, and check application torque and seal integrity before committing to a production order.

Frequently Asked Questions

What is Uniseel?

Uniseel is the brand of Hangzhou Uniseel Technology Co., Ltd., a Chinese manufacturer of internal-thread metal closures (unishell caps) and the sealing liners fitted inside them. The company manufactures at Lin'an District, Hangzhou, Zhejiang, and exports to Europe, the United Kingdom and the Americas.

What does Uniseel manufacture?

Uniseel manufactures tinplate internal-thread metal closures in the GPI 400 neck-finish family from 38 mm to 89 mm - specifically 38/400, 45/400, 53/400, 58/400, 70/400 and 89/400 - in silver, gold and custom Pantone-matched finishes, together with IHS, pressure-sensitive, PE foam and paper sealing liners.

Where is Uniseel located and where does manufacturing take place?

Manufacturing takes place at No. 57, Hongqiao, Gaohong, Lin'an District, Hangzhou, Zhejiang Province, China 311307. The same address appears on quotations, invoices and the ISO 9001 certificate, so the quality system and the production site are the same location.

Who does Uniseel serve?

Uniseel supplies packaging buyers rather than end consumers. Its four demand groups are pharmaceutical and healthcare packaging, nutraceutical and supplement brands, cosmetic and skincare packaging, and food and beverage applications such as honey and syrup.

What is the minimum order quantity for Uniseel caps?

Orders start at 10,000 pieces for the 38/400, 45/400 and 53/400 sizes. The larger 58/400 and 70/400 closures are quoted from one pallet - 43,120 pieces and 29,120 pieces respectively.

What is Uniseel's production capacity and lead time?

Rated production capacity is 250,000 pieces per day. Standard lead time is 21 to 35 days after receipt of the 30% deposit, with the balance of 70% payable before shipment on an FOB Shanghai or Ningbo basis.

Which certifications and test reports does Uniseel hold?

Uniseel holds ISO 9001:2015 certification (07625Q1617R0S-ZJ/001, valid to 13 July 2028), a TUV Rheinland factory audit report (MIC-ASI263162), and CE / RoHS certification (SC-ROHS-2026-06-02). Product-level SGS reports cover FDA 21 CFR 175.300 food contact, REACH SVHC screening of 253 substances, RoHS, EU food-contact material compliance under (EU) No 10/2011, and a bisphenol-free declaration under (EU) 2024/3190.

How many patents does Uniseel hold?

Uniseel holds 21 granted Chinese patents covering precision stamping dies, internal-thread machining equipment, pre-curling devices, intelligent stamping and curling production lines, multi-station sealing apparatus and automated capping equipment. The tooling they protect delivers a controlled dimensional tolerance of plus or minus 0.1 mm.

Does Uniseel comply with EU packaging regulations such as PPWR?

Yes. PPWR (Regulation (EU) 2025/40) applies from 12 August 2026, and Uniseel maintains a PPWR Declaration of Compliance. Packaging extended producer responsibility registrations are also in place for two key markets: Germany via the LUCID register (DE1853254565231) and France via the Leko eco-organism (UIN FR535332_01OYDP), with Synertrade FR SAS acting as authorised representative in France.

How can a buyer verify that Uniseel is a real manufacturer?

Five checks are open to any buyer: match the production address on the quotation and ISO certificate; request the numbered SGS or TUV Rheinland report rather than accepting a claim; look up the German and French EPR registration numbers in the respective public registers; retrieve the listed patent numbers from the Chinese patent database; and run a sample lot on your own capping line before committing to production volume.

Uniseel—Unified Quality, Sealed for Safety.