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Walk through any supermarket beverage aisle and you're looking at the end result of billions of 28mm preform and 30mm PET preform units. The 500ml water bottle. The 330ml cola. The 300ml juice. Every single one started as a small, test-tube-shaped piece of PET — injected, cooled, and shipped to a bottling plant for reheating and blow molding.
These two neck sizes — 28mm PCO1810 and 30mm 2925 — are the industry standards for small-format beverage packaging. They're also where quality differences between 28mm preform suppliers become painfully obvious. A slightly off-spec 30mm PET preform can cause cap sealing failures, carbonation loss, or blow molding defects that waste entire production runs.
At Jinting, we've manufactured 28mm preform and 30mm PET preform products for over 25 years. Our factory in Huangyan, Taizhou spans 20,000+ square meters, runs 30+ automated injection lines, and employs over 100 experienced technicians. Every 28mm preform and 30mm PET preform we ship is ISO9001 and ISO22000 certified, with FDA approval on product lines destined for the North American market.
We use 100% virgin food-grade PET resin for every 28mm preform we produce. Always. No regrind. No recycled content unless you specifically request it. Because when your 28mm preform becomes a bottle of sparkling water that a family drinks at dinner, the material matters. The same goes for every 30mm PET preform — virgin material, full traceability, batch-level quality records.
Production speed — because bottling lines don't wait
A high-speed bottling line can fill 30,000 bottles per hour. That's 500 bottles per minute. If your 28mm preform supply runs short, that line stops. And a stopped line costs real money — every minute. The same applies to 30mm PET preform inventory — you can't blow bottles without preforms.
Standard 28mm preform and 30mm PET preform orders enter production the same day you confirm. For custom weights or colors on your 28mm preform order, our engineering team delivers a preliminary design within 24 hours. Samples ship in 7–15 days, and mass production follows immediately after approval.
Each order of 28mm preform or 30mm PET preform has a dedicated project coordinator who knows your exact specs: the gram weight, the color code, the neck finish tolerance, the shipping schedule. One person. One conversation. No runaround.
Packaging designed for preform protection
Small-neck 28mm preform and 30mm PET preform units are lighter than their large-neck counterparts, but they're just as sensitive to transit damage. A scratched neck thread on a 28mm preform means a cap that doesn't seal. A deformed body on a 30mm PET preform means a blow molding failure.
Our packaging protocol: every batch of 28mm preform is sealed in clean PE liner bags first — this blocks dust and moisture. The bags go into export-grade cartons with internal dividers that keep individual 30mm PET preform units separated. For heavy shipments of 28mm preform products, we use double-wall corrugated boxes, corner protectors, and steel strapping. Desiccant packs are standard on all ocean freight shipments to manage humidity inside the container.
We've seen the consequences of bad packaging: preforms that arrive looking like they've been through a tumble dryer. Scratched, contaminated, unusable. Good packaging costs a little more upfront and saves a lot of grief later.
Our 28mm preform range covers PCO1810 neck finish — the global standard for carbonated soft drink bottles. Available gram weights from 13g to 55g, covering bottle volumes from 200ml to 2L. Designed to handle carbonation pressure without stress cracking.
Our 30mm PET preform range uses the 2925 neck standard — lighter and more material-efficient than 28mm, ideal for still water and juice bottles. Available gram weights from 10.5g to 35g, covering bottle volumes from 250ml to 1.5L.
Both 28mm preform and 30mm PET preform product lines support:
- Custom gram weights (precise to ±0.5g)
- Pantone color matching for brand-tinted preforms
- UV-resistant formulations for sun-exposed retail environments
- Matching caps (28mm PCO1881 tamper-evident, 30mm flat caps)
Beyond small-neck preforms, we manufacture 38mm, 45mm, 46mm, 48mm, and 55mm (5-gallon) preforms, plus matching handles, caps, finished water bottles, and edible oil bottle preforms. One supplier. Full packaging supply chain.
Our in-house mold workshop handles custom neck designs and weight optimization projects for both 28mm preform and 30mm PET preform applications. No outsourcing to third-party tooling shops. Everything under one roof, one quality system, one point of accountability.
Thank you to every beverage brand, co-packer, and distributor who has trusted Jinting with their 28mm preform and 30mm PET preform supply over the past quarter-century. You've pushed us to hit tighter tolerances, respond faster, and pack smarter.
If you're evaluating suppliers for your next 28mm preform or 30mm PET preform order, we'd be happy to put together a proposal. Tell us your target gram weight, annual volume, and destination — and we'll respond within 24 hours.
Visit www.jtpreform.com
