How to use this guide
Use this guide to prepare your requirements. Contact us if you need help choosing a configuration.
A premade pouch machine must handle more than the printed width and height of the bag. For zipper pouches, it also needs to grip, open, fill and seal the actual pouch construction consistently. Before ordering, compare the proposed machine with physical samples from the packaging supplier you intend to use.
This guide focuses on zipper and stand-up pouch compatibility. For the earlier decision between buying ready-made bags and forming bags from film, read our VFFS versus premade pouch comparison.
Start with a drawing and representative samples
Provide the overall width and height, bottom gusset dimensions, zipper position and the distance between the zipper and the top edge. Include any side gussets, handle openings, hang holes or unusual shapes. The machine needs usable areas for gripping and sealing, not just enough space for the product.
Send samples of every important format, including the smallest and largest packs. If two designs have the same external dimensions but different laminates or zipper profiles, identify them separately. A supplier trial with a visually similar bag does not establish that your purchased bags will run the same way.
Clarify how the zipper arrives
Ask your pouch supplier whether bags arrive with the zipper open or closed, and whether this condition is consistent throughout a delivery. A closed zipper may require an opening operation beyond separating the pouch faces. Confirm whether the proposed machine includes that operation and how it is checked before filling.
Distinguish the zipper from the final seal above it. The reclosable zipper serves the consumer after opening; it does not replace the specified top seal for the initial pack. Show the intended opening sequence, tear notch and finished seal position so the equipment discussion follows the package design.
Watch bag pickup and opening
Observe how pouches are stacked, separated and transferred to the grippers. Surface finish, static, curl and variation in the stack can affect pickup. A short run using carefully arranged bags may not show what happens as the stack height changes or a fresh stack is loaded.
During opening, look at the pouch mouth and bottom rather than only the machine arms. Ask how the machine detects a missed or incompletely opened pouch, and whether filling is prevented in that condition. Test the intended fault response during a controlled demonstration with the supplier; do not assume that every configuration has the same sensors.
Connect pouch handling to the product dose
The filling device may be an auger, liquid dosing unit or weighing system, depending on the product. It must deliver the dose within the time and space available at the pouch station. Product bridging, slow flow or a large temporary volume can hold up the entire cycle even when the pouch handling mechanism moves quickly.
Describe the product size, flow behavior and target net content. For powders, consider dust at the top of the bag. For granules, watch for pieces bouncing toward the zipper or seal. For liquids and pastes, inspect splashes and strings during cutoff. Evaluate the finished pouch after normal transfer, not only while it is held upright by the machine.
Check the sealing zone after filling
Confirm the usable seal area and the laminate structure with the pouch manufacturer. Seal performance depends on the packaging material and the actual combination of temperature, pressure and contact time. There is no single setting that can be copied safely across all laminates.
Look for folds, trapped product, uneven contact and distortion near the zipper. Where cooling or a second sealing station is proposed, confirm its purpose for your package. Use an agreed package-integrity test appropriate to the product and distribution route. Our pouch film and seal test checklist provides a starting point for that discussion.
Compare accepted packs, not empty cycles
Ask for output expressed as completed acceptable pouches over an agreed period. Record rejected pouches, missed pickups, operator interventions and refill stops. Empty-machine cycle speed does not include the behavior of your bag, product and filling device.
Choose a representative run that includes bag loading, product replenishment and at least one planned format change if changeovers are central to your business. Keep results for each pouch and fill size separate. An average across several easy formats can hide a difficult combination that matters to your order.
Make the quotation boundary explicit
List the bag magazine, zipper-opening arrangement, dosing unit, product feeder, coding equipment and discharge method as separate items. Identify which are included and which are optional. Ask which format parts are needed for the full pouch range and where the operator stores recipe settings.
For a focused quotation, send the pouch drawing, laminate description, sample photographs, zipper condition, product characteristics, fill range and target accepted packs per shift. Include the expected number of daily format changes. Share your zipper pouch project with MUJIU so the equipment comparison covers the complete bag-to-finished-pack sequence.