Hangzhou Uniseel Technology Co., Ltd.
Studium Casus: 43.120 Capsulae Aureae 58 mm Unishell pro Societate Americana Emballagiorum
1. A Pallet Order, and a Request to Move Faster
A leading US packaging company recently placed an order with Uniseel for a full pallet of 58mm gold unishell caps fitted with pressure-sensitive (PS) liners — 43,120 pieces in total. The caps will be supplied to the customer's own clients, which means every single unit must meet the strict visual, dimensional and food-contact standards expected on the North American market.
What happened next is a story about flexibility as much as about manufacturing. At the customer's request, we packed 60 pieces of the exact production run and sent them by air freight the very same day the order was confirmed. Air freight reaches the United States in days rather than the weeks a sea container needs, so the customer could start presenting the actual product to their end customers almost immediately — while the full pallet continued its journey by sea.
2. Why the Sample Flight Mattered
Figure 1 - The air-freight sample package: order-matched 58mm gold caps in sealed bags, with full compliance documentation and contact details.
In B2B packaging, trust is built with physical evidence. A specification sheet can describe a cap, but only a real cap can demonstrate the brushed gold finish, the smooth thread engagement and the clean fit of the pressure-sensitive liner on a bottle neck. The US customer knew this, and so did we.
The 60 air-freighted samples were taken directly from the customer's own order — not from a different batch — so what the customer's prospects see is exactly what the full 43,120-piece pallet will deliver. No color deviation, no dimension drift, no 'sample versus bulk' surprises. That is the essence of our 'First Box, Full Answer' philosophy: the first box a customer opens must answer every question they have.
3. 58 mm: Uncommon Size, Common Practice for Us
58 mm is not a standard shelf size in the closure industry. Most metal cap production worldwide concentrates on the 38 mm and 45 mm formats used by the beverage and supplement industries. Yet for Uniseel, 58 mm is a size we produce regularly. Customers across different markets repeatedly order this diameter for large-format jars, cosmetic pots, honey containers and premium food packaging.
Hoc experientia in linea productionis magni momenti est. Nostri instrumenti domi fabricati pro operculis 58 mm iam probata sunt, nostri matrices ad formandam laminam exacte adaptatae sunt, et nostrae procedurae ad custodiam qualitatis ad geometriam maioris diametri accommodatae sunt. Fornitor qui numquam antehac opercula 58 mm produxerit, hebdomades errorum et experimentorum patietur. Nos autem simpliciter ordinem productionis disponimus — quare etiam cliens exemplaria ordini suo exacte congruentia intra dies paucos post confirmationem ordinis accepit.
Substratum cuiuslibet magnitudinis quam producimus est nostra norma interna tolerantiæ ±0,1 mm, quae protegitur portfoliō patentiarum viginti unius, quae machinas ad formandam laminam, instrumenta ad formandam filettum et lineas productionis automaticas comprehendunt. Opercula maioris diametri maiora requirunt in rotunditate et in coniunctione filetti, atque praecise in hoc campo nostra facultas controllo preciso demonstrat suum valorem.
4. Productum: Aurum Color + Liner Sensibilis ad Pressionem
Figura 2 – Opercula aurea 58 mm unishell cum lineribus sensibilibus ad pressionem: idem productum ex ordine clientis Americani pro 43 120 partibus.
The caps in this order combine two characteristics that matter for premium packaging:
Brushed gold finish. The matte, fine-brushed gold surface gives jars a premium shelf presence. The finish is achieved with food-grade organic coating on electrolytic tinplate — no electroplating — which keeps the cap RoHS-compliant while delivering the warm metallic tone customers expect.
Pressure-sensitive (PS) liner. The white PS foam liner bonds to the bottle rim purely under the compression applied when the cap is torqued down. No induction heating equipment is required, which makes PS-lined caps a simple and cost-effective solution for glass, metal and PET containers — and a common choice for aluminum bottles.
Sicut omnes clausurae Uniseel, tecta fabricantur sub systemate gestionis qualitatis ISO 9001:2015 et confirmantur per verificatum tertium partem: raportus examinum SGS pro contactu cum cibis (FDA 21 CFR 175.300), conformitas ad REACH SVHC et RoHS, simul cum conformitate ad Regulamentum UE (CE) Nr. 1935/2004. Ipsa expeditio exemplarium transiit cum integro fasciculo documentorum de conformitate — declarationes, referentiae raportuum examinum et notae contactus — ut aequipe clientis haberet omnia quae indigebat ad unum visum.
5. Quod Clientis Experientia Fuit
Imagina te in positione aequipe procurandi clientis. Una conversatio complectebatur:
Dimensionem non-standard — confirmata ut disponibilis, cum experientia productionis et instrumentis probatis.
Integram documentacionem ordinis — probationes conformitatis confirmatae per SGS paratae ante expeditionem.
Exemplar acceleratum — 60 exemplaria congruentia cum ordine transmissa per aerem eodem die.
Palleta plena in transitu — 43,120 pieces scheduled for sea delivery, with the same quality standard.
This combination — specialty size capability, documented compliance and supply-chain flexibility — is why established packaging companies come to Uniseel for closures they cannot source easily elsewhere.
6. Summarium
The 58mm gold unishell cap order for the US market is a textbook example of what Uniseel does best: producing non-standard sizes without compromise, proving quality with hard evidence, and moving at the speed the customer's business requires. Whether a customer needs 60 samples in the air today or 43,120 caps on a pallet tomorrow, the answer is the same — First Box, Full Answer.
Frequenter Interrogata (FAQ)
Q1. Can Uniseel produce 58mm metal caps?
A. Yes. 58mm is a size we produce regularly for large-format jars, cosmetic pots and premium food packaging. Our tooling and production lines are already proven for this diameter, so lead times are comparable to standard sizes.
Q2. What liner options are available for 58mm caps?
A. Nos offrimus tamquam lineras sensibiles ad pressionem (PS) quam lineras sigillantes per calorem inductionis (IHS) pro operculis 58 mm. Linera PS sigillat pura compressione durante applicationem operculi et nullum apparatus inductionis requirit.
Q3. Quae est torque applicationis pro operculo 58 mm cum linera PS?
A. Torque in tua linea capsulandi verificari debet per torquimetrum. Pro regula generali, diametri maiores altiorem torque postulant quam 38 mm (17–21 in-lb) aut 45 mm (20–25 in-lb); nostra aequipe technica specificam recommendationem pro tua combinatione operculi 58 mm et ampullae praebet.
Q4. Suntne opercula aurea ad usum in contactu cum cibis idonea?
A. Ita. Opercula testata sunt secundum FDA 21 CFR 175.300, REACH SVHC et RoHS; raportus de testibus SGS disponibiles sunt. Etiam conformantur Regulationi UE (CE) n. 1935/2004.
Q5. Estne aurum per electrodepositonem applicatum?
A. Non. Aurum utitur organico recubrimento ad usum cibarium super laminis stanneis electrolyticis, absque electrodepositone, quod opercula RoHS-compatibilia manere facit.
Q6. Mititisne exemplaria antequam productio massiva incipiat?
A. Yes. We support the 'First Box, Full Answer' approach — samples can be drawn directly from the customer's own production order and air-freighted for fast evaluation, as we did for this US customer.
Q7. Can you match samples to the bulk order exactly?
A. Yes. When requested, samples are taken from the same production run as the bulk order, guaranteeing identical color, dimensions and liner performance.
Q8. What is the minimum order quantity for 58mm caps?
A. MOQ depends on the finish, liner and volume required. Contact us with your specification and annual volume for a tailored quotation.
Q9. How do you ensure dimensional accuracy on large-diameter caps?
A. We control an internal tolerance of ±0.1mm, supported by 21 patents covering precision stamping dies, thread-forming equipment and automated production.
Q10. How long does sea freight take for a pallet to the United States?
A. Maritime transport usually requires several weeks, depending on the port. When speed is essential, we can ship sample quantities—or even full orders—by air upon request.
Uniseel — Unified Quality, Sealed for Safety.
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