Closures and liners
Updated
On this page8
What is here
236 closures against these necks: 159 continuous thread, 27 spouted, 19 flip top, 7 phenolic, 7 buttress, with tub and dome lids behind them. By liner, 80 HIS, 37 pressure-sensitive, 17 PE foam, 15 F217, 14 foam and 28 with no liner at all.
Three liner shapes, three jobs
Foam and F217 compress against the land and seal while the cap is on. A pressure-sensitive liner sticks to a clean land on first application. An induction liner bonds under a sealing head and stays sealed with the cap off.
Induction sealing needs equipment
Those 80 HIS closures only become sealed packages after passing under an induction head at the right power and line speed. Buying them without the sealing step gets you a foil-faced liner and no membrane.
Phenolic caps are the solvent tradition
There are 7 on this shelf. Thermoset rather than thermoplastic, and historically the choice for aggressive solvents, which is a reason to look at them for oil-paint thinners rather than defaulting to polypropylene.
No liner is sometimes the right answer
28 closures here carry none, which suits a product where a dispensing fitment does the sealing or where a liner material would be attacked. It is a deliberate choice rather than an omission.
Ask per binder, in writing
The useful question names your solvent and its concentration and asks what has been tested. A generic "chemically resistant" answer tells you nothing about alcohol ink or about a petroleum thinner.
One neck, one liner, one setting
Standardizing the range on a single finish means one closure, one liner and one induction setting, and it means one compatibility test rather than several. That is the saving that shows up in practice.