A 25 micron perforated stretch film supplied on 1300 metre machine rolls. Your wrapper applies the stretch, which is why JMSH01 reaches a high containment force while the thirteen holes in every row keep the pallet open to moving air.
Send your pallet size load weight and wrapper model and we will confirm the roll format that fits your line.
Ventilated stretch film is designed to maximise the aeration of the product wrapped. Because of its perforated film structure it allows quicker cooling and drying of palletised goods, and it is easy to apply by hand or machine.
JMSH01 is the prestretchable grade. It leaves our factory at 25 microns and 500 mm wide, and it is stretched on your wrapper up to a prestretch of 230 percent. Because the stretch happens on your line, one roll covers far more pallet surface than its 1300 metre length suggests, and the film reaches the load already under tension.
That combination matters when the pallet is heavy or the load is unstable. The film carries a tensile stress at break of 26 kg and an elongation at break of 250 percent, so there is a working range between the tension you need for containment and the point at which the web fails. The perforation rows sit inside that web rather than cutting through it, which is why a ventilated film can hold a load at all.
Thirteen holes in every row give the pallet an open path for chilled or forced air, so goods carry on cooling after they are wrapped rather than sitting in a sealed plastic skin.
Warm or damp goods release moisture inside the wrap. A perforated web lets that vapour leave instead of collecting on cartons, labels and metal cans.
At 25 microns with a tensile stress at break of 26 kg, JMSH01 holds heavier and less regular loads than a thin prestretched film can.
A prestretch of 230 percent means the film is elongated on your wrapper before it reaches the load, so a 1300 m roll wraps far more than 1300 m of pallet face.
The 500 mm web and 11 kg machine roll are a conventional format for turntable and rotary arm wrappers, so there is no equipment change to trial it.
Width to five percent, thickness to two microns and weight per metre to five percent give your goods inwards team something concrete to measure.
JMSH01 suits producers and distributors who wrap on a machine and need real containment force as well as ventilation.
The film exists to solve one specific failure, and a handful of consequences that follow from it.
Canned goods, pasteurised products and hot filled containers still hold heat when they reach the wrapper. Perforations let that heat and the vapour it carries leave the pallet instead of condensing on the inside of the film.
In a forced air tunnel the air has to move through the pallet, not around it. Ventilated film keeps that path open so the pallet reaches temperature on the schedule the cooler was designed for.
Moving a cold pallet into humid ambient air produces condensation on the outside of the load. An open wrap allows that film of water to dry rather than sit trapped.
Containers go through repeated temperature swings. A wrap that breathes reduces the amount of water cycling on and off the cartons over a multi week voyage.
The thicker 25 micron web gives the containment force needed when case sizes vary across a layer and the load wants to lean.
Fruit and vegetables carry field heat and surface moisture. Wrapping them in a ventilated film means the pallet can be stabilised without stopping the cooling process.
The values below are the working numbers for the film, and each one changes something on your line.
| Technical Feature | Machine Rolls (Prestretchable) | Tolerance |
|---|---|---|
| Length | 1300 m | — |
| Width | 500 mm | ±5% |
| Average thickness | 25 µm | ±2 µm |
| Prestretch | 230% | — |
| Elongation at break | 250% | ±10% |
| Tensile stress at break | 26 kg | ±10% |
| Number of holes | 13 | — |
| Weight per metre | 8.5 g | ±5% |
| Weight per roll | 11 kg | ±5% |
Technical data sheet for Ventilated Stretch Film JMSH01, prestretchable machine rolls. Ventilated stretch film can be customised to your request.
JMSH01 is a perforated polyethylene stretch film. The web is what carries the load, and the perforations are formed within it, so the material has to hold tension around every hole rather than only along a continuous sheet.
Jiamei has been developing packaging products for more than thirty years and works to reduce the environmental impact of packaging. On a wrapping line the most direct way to do that is to use less film per pallet, which is what a high prestretch grade is for. If your priority is the lowest plastic weight per pallet rather than the highest containment force, compare this grade against JMSH02.
The film is extruded as a stretch film web and then perforated in line, so the holes are part of the film structure rather than something punched into a finished reel afterwards. Thirteen holes are formed across each row, which is what gives the wrap its open area while the surrounding web still carries load.
The web is then wound to the roll length and core specified for your line. Prestretchable grades are wound so that the stretch is applied by your wrapper, and prestretched grades are stretched during production so that the film arrives at the width and thickness it will be used at.
Every technical value on this page is written with a tolerance because that is how film is controlled in production. Width is held to five percent, average thickness to two microns, and weight per metre to five percent. Those three numbers together tell you whether a roll will run at the tension your wrapper is set to.
Check an incoming delivery the same way. Weigh a full roll against the stated roll weight, measure the web width, and run one pallet at your normal settings before releasing the batch to the line. A roll that is within tolerance on all three will behave like the sample you approved.
Jiamei has not published certificate scans on this website, so nothing is claimed here that we cannot show you. Before you place an order tell us the destination market and the goods the pallet carries, and our sales team will send the documentation that applies to that shipment, together with the material declaration for the resin used in your production run.
If your quality system needs a specific document to open a supplier file, ask for it during sampling rather than after shipment so the paperwork travels with the first order.
Ventilated stretch film can be customised to your request. The variables that matter most on a wrapping line are roll length, web width, core diameter and the format you need for the equipment you run.
Send the details of your wrapper and your pallet on WhatsApp and we will confirm what can be produced before you commit to a trial order.
| JMSH01 against JMSH02 and JMSH03 | JMSH01 is 25 microns and stretched on your machine. JMSH02 and JMSH03 arrive already stretched at 8 microns. JMSH01 gives more containment force, JMSH02 gives less plastic per pallet. |
|---|---|
| JMSH01 against solid stretch film | A solid film of the same gauge seals the pallet. JMSH01 holds a comparable load while leaving thirteen open holes in every row for air and vapour. |
| JMSH01 against pallet netting | Netting has far more open area and suits irregular or very warm loads. Film gives a smoother surface, more dust protection and a tighter wrap on regular case loads. |
| Machine rolls against manual rolls | JMSH01 is supplied as a 1300 m machine roll. If you wrap by hand, JMSH02 manual rolls at 440 m are the lighter and easier format to handle. |
Comparison based on the published technical data for each Jiamei grade. Ask us for a sample of both films if you want to run them on your own wrapper before deciding.
JMSH01 is stretched by the wrapper, so the setting on the machine does more for your film cost than anything else in the process.
Run one pallet at your usual settings before releasing a new batch to the line, and check the corners rather than the flat faces. Corners are where containment force shows first.
Set the prestretch on the wrapper below 230 percent to start with, then raise it in steps while watching the corners of the load. When the film starts to neck in or break at the corners you have gone past what the load geometry allows, and the correct setting is one step back from there.
Questions buyers ask before ordering JMSH01 Prestretchable.
It means the stretch has not been applied yet. The film leaves our factory at 25 microns and 500 mm wide, and your wrapper elongates it up to 230 percent as it wraps. The alternative is a prestretched film such as JMSH02, which is stretched during production and arrives ready to apply.
That depends on your pallet size, the number of wraps in your cycle and the prestretch setting on your machine. The arithmetic starts from a 1300 m roll at 500 mm wide with prestretch up to 230 percent. Send us your pallet dimensions and wrap count and we will work it through with you.
The perforations are formed within the film web rather than cutting across it, and the film still carries a tensile stress at break of 26 kg with an elongation at break of 250 percent. For loads that need more containment than a thin prestretched film provides, JMSH01 is the grade to look at first.
The 500 mm web and the 11 kg machine roll are a conventional format for turntable and rotary arm wrappers. Confirm your mandrel diameter with us and we will supply the core to suit.
230 percent is the working stretch the film is designed to be applied at. 250 percent is where it breaks. Setting the machine close to the break figure is what causes web failures at pallet corners.
Yes. Ventilated stretch film can be customised to your request, including roll length, web width and core diameter. Tell us the wrapper model and pallet size and we will confirm what we can produce.
It is used where condensation or moisture builds up under a wrap, including breweries, soft drinks, pasteurised goods, canned foods, pharmacies, dairy, fruit and vegetable, plants, meat, fish and frozen snacks.
Weigh a full roll against the stated 11 kg, measure the web width against 500 mm and check the average thickness against 25 microns. All three carry published tolerances, so a roll inside them will run like the sample you approved.
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