A crate liner – paper, film or a thin foam – goes inside a crate to protect the contents from the crate and the crate from the contents. They are cheap, they are used once, and in a lot of operations they are a surprisingly large line on the consumables budget because of the volume.
What a liner is actually for
Usually one of three things. Abrasion: soft or delicate produce rubbing against a ribbed crate wall. Moisture: holding condensation or drainage away from the product. Or cleanliness: keeping the crate clean so it does not need washing between uses.
These are different problems and they have different answers. If you do not know which one you are solving, you will buy the wrong liner and probably use more of it than necessary.
Option one: a washable liner
A thin polypropylene sheet or a formed liner that goes in the crate, comes out, gets washed and goes back in. In a closed loop with a wash facility this pays back quickly – a liner used weekly for two years is a fraction of the cost of a hundred disposable ones.
The catch is the same as for every washable product: somebody has to wash it. A washable liner that never gets washed is worse than a disposable one, because it is holding contamination against the product.
Option two: change the crate instead
Often overlooked. If the liner exists because the crate wall is abrading the product, the answer may be a crate with a smoother internal finish or a different floor pattern rather than a liner at all. That removes a consumable and a handling step.
This is worth asking before anything else. Liners are frequently a workaround for a crate that was specified for the wrong crop.
Option three: reduce what the liner does
Sometimes a liner is doing three jobs badly because nobody asked. A ventilated crate with a smooth floor may handle drainage and abrasion without any liner, leaving only cleanliness – which a wash cycle can handle.
Halving what the liner has to do often halves its cost, and it usually improves the packing operation at the same time because there is one less thing to fit.
Where disposables are clearly right
One-way chains, contaminated product, and anything where the liner is soiled in a way that makes washing unpleasant or unsafe. Also any operation with no wash facility and no plan to build one.
There is no shame in it – a disposable liner is a rational choice in a lot of supply chains, and reusable packaging only wins where something actually comes back.
How to decide, quickly
Ask two questions. Do the crates come back? And is there a wash facility? If both answers are yes, a washable liner is worth costing. If either is no, buy disposables and spend the effort somewhere else.
Then check whether the liner is really necessary – try a run without one and see what the damage looks like. Plenty of liners are carried forward from a decision made years ago for a different product.
That is a half-day trial and it is the highest-value thing you can do before committing to either route.
What we can do
We make PP crates for fruit and vegetables with floor and wall finishes chosen for the crop, which often removes the need for a liner entirely. Tell us what you are packing and what the liner is currently for, and we will tell you which of the three routes applies.