Views: 0 Author: Site Editor Publish Time: 2026-10-13 Origin: Site
The spec sheet will tell you the capabilities of the machine. The test run is what will tell you how it will actually perform with your straws under your circumstances, on a humid day in July. That’s an issue that’s much bigger with paper straws than with plastic.
Paper straws are tricky. They are more malleable, less consistent in their characteristics, and more susceptible to changes in humidity than a hard PP straw. A packaging machine that performs beautifully with plastic straws will suddenly be prone to jams, crushing, and bad seals if you switch it to paper. So before you wire funds to the company, you’ll need to see it operate with your straws for long enough to spot issues that two minutes of a demo video won’t reveal.
Below is a practical checklist for what to look at, measure, and ask during a paper straw packing machine test run, along with the preparation that makes the test worth running at all.
Plastic straws are rigid and uniform, while paper straws are not. There may be different levels of seam glue application, different wall thicknesses, some fraying in cut edges, different levels of moisture in paper depending on humidity, and all of this affects the behavior of the straw in the feeding channel, forming wheel, or sealing jaws of the packing machine.
This is why paper straws are likely to show you problems which can not be spotted by a simple inspection of a product catalog – straws becoming slightly oval due to pressure in the feeding channel, cut ends of straws becoming caught in guiding elements, spirals opening up because of the heating, static electricity and paper dust accumulating in sealing area. None of this is visible from a specification sheet.
Not testing your product is a costly decision despite the fact that it appears to be time saving at first glance. Your perfectly looking machine becomes faulty when used with your straws causing downtime, wasted film and many rejected packs. You then have to explain this to your customers when the shipment comes.
A test run is only as good as what you feed it. Rush the preparation and you’ll get a demo that flatters the machine instead of testing it.
Send your real straws to us, not the sample that was selected by your supplier: provide your production straws in your required diameters and lengths, 6mm for cocktail straws or 10mm and above for bubble tea straws. Send us a few samples that are in your worst case scenarios as well, for instance, straws that are slightly bent, straws having thick walls, and printed/colored straws as well. The machine, if able to handle such worst case scenarios, will be able to handle all kinds of products you intend to process. A few thousands of pieces can be considered as a reasonable minimum requirement for any meaningful test.
Set your packaging specification ahead of time: define your wrapper material (Paper Film, PLA Film or OPP/CPP); film width and thickness and pack style; whether it is Individual Wrap with printed film or Group Pack. Also, define your target output rate of pieces per minute at the quality level which is actually required, rather than that stated in the brochure of the equipment.
Define the Pass/Fail criteria in writing before the test: set the target speed, acceptable rejection rate, minimum seal strength and maximum number of jams per hour. This protects you from a supplier who moves the goalposts once the machine starts struggling, and it protects a good supplier from a buyer who judges the test unfairly. Sunrise Machinery’s service team can usually walk through this with you ahead of time, which is worth doing before you fly out or schedule a video call.
Here’s what actually matters once the machine is running. Go through these one at a time, and don’t move on until you’re satisfied with each one.
Running speed versus rated speed: run the machine at its rated speed for at least 30 to 60 minutes, not two minutes. Time the production rate yourself using a stop-watch and counting the output, rather than depending upon the readout of the display. If the machine is only able to reach the stated production speed when provided with a “perfect” straw or when fed by hand from the hopper, then that figure in the specifications sheet is not true.
Straw feeding and orientation stability: observe the hopper, the feeding channel, and the handoff to the wrapping station. Straw movement should be oriented consistently throughout the system. Observe if there are any straws bridging over in the hopper, overlapping in the channel, or being double fed into the same slot. Because the slightly misshapen paper straws will often get hung up in guide areas where plastic straws will not, paper-specific issues will manifest here first.
Jam rate and stoppage frequency: record all stoppages during the run: what led to it, how much time did it take to fix, and whether any tool was needed for that purpose. Calculate jams per 1,000 straws or per hour of running. It is normal to have one or two jams during a long run but a jam occurring every couple of minutes is abnormal; recurring in the same place it also means design or set-up issues and not some bad luck.
Seal quality and package appearance: Seal performance and appearance of the package: check seal width, uniformity, presence of wrinkling and tunneling. This can be easily done by doing a simple squeeze test and pulling or bending the pack made. If you are using a printed film, check its registration and correct cutting position for each pack and not just for the first ten.
Straw integrity after packing: open some of the packages randomly and observe the condition of the straws. Observe whether there is any dust or sticky remnants of glue left on the inner side of the film. This check is important since even if the packaging is perfect, the damaged straw makes the product unacceptable.
Film consumption and waste: calculate how much film was consumed per package in comparison with the theoretical data provided by the supplier. Measure the waste at startup, at changeover, and at each splicing stage separately. One approximate equation for the calculation: film waste % = ((consumed film - film in good packages) / consumed film) x 100. Since film consumption is an ongoing process and not a one-off operation, even a minor amount of waste will grow rapidly within a year of production.
Changeover time and ease of adjustment: if you plan to run more than one straw size, time a complete changeover process involving film, forming tools, and machine set-up. See if it requires the use of tools and skills or if it is something that your operator can do. Have the supplier's operator carry out the changeover in front of you rather than have it carried out by some technician in secret.
Operator interface, alarms, and safety: see if the touch screen panel is legible and in the right language. Fault messages should indicate the particular issue rather than provide a general “error” message. In addition, physically inspect guards, emergency stop buttons, and interlocks and find out what certificates apply to the machine.
Beyond the core checklist, a handful of smaller details tend to separate a machine you’ll be happy with from one that becomes a maintenance headache.
Noise, vibration, and heat stability: listen for any noise anomalies that could indicate misalignment and/or worn components and look for stable temperatures across the entire run rather than temperature drift starting at twenty minutes.
Cleanliness and maintenance access: check how easy it is to gain access to the sealing jaws, film, and cutters so that these can be cleaned or replaced. Make sure to request a parts list; the straw packing machine spare parts page at Sunrise Machinery provides an idea of available spare parts.
Downstream fit: ensure that the packaging process from the machine will work with your boxing/cartoning equipment and if the machine can be interfaced with feeding or arranging equipment when used in combination with a straw manufacturing machine.
The visit to the factory is the ultimate way. Come armed with your own straws, a scale, a caliper, a stopwatch, and the inspection form discussed prior to the visit.
Should the distance not permit, conducting an online video test would be the second best option, if you insist on certain criteria – several camera angles, a clock visible in the frame, and a complete unedited video as opposed to just highlights of it. Select your straws for the test, request a test to last longer than just a couple of minutes, and keep your copy of the recording. An additional expense but one well worth it, should your budget allow for it, would be hiring a third party independent inspector.
A few warning signs are worth taking seriously before you commit:
Refusing your straws: When a supplier demands that you use only their sample straws for the test, they are trying to conceal something.
A short or heavily edited demo: Two minutes of video does not reveal much about continuous work.
Speed that drops sharply on a straw change: if switching diameters or materials causes a big performance hit, that’s a design limitation, not a one-off glitch.
Vague answers on spare parts or warranty: If a supplier is unable to answer your questions honestly, then there will be no improvement afterward.
Test it yourself, run the machine long enough for there to be any actual problems, measure not estimate, and ensure that your acceptance criteria are set before the testing begins. If you do all that, you will definitely make an informed decision after the test run, and not a sales pitch masquerading as evidence.
If you’re ready to see how a paper straw packing machine performs with your own product, Sunrise Machinery offers both on-site and live video test runs and can talk you through setting up your acceptance criteria beforehand. Browse our full straw packing machine lineup to explore our straw packing machinery options.
A test run (or a factory commissioning / trial) for paper straw packing machines is expected to take 2 to 4 hours for a routine inspection and up to 8 hours (an entire work shift) for full-stress verification.
After all, it is quite likely that you can do a trial run yourself using your own materials before you decide to purchase the machine. This is what reliable manufacturing companies expect their customers to do before making a purchase.
A good reject rate for an automatic straw packing machine is usually below 0.5% to 1% (or around 500 to 1,000 ppm/parts per million). In the food and beverage industry, when rejection rates exceed 1% to 2%, it implies mechanical problems, improper feeding of film or paper, and sensor alignment which require urgent servicing.
Yes, a Factory Acceptance Test (FAT) should certainly be part of your purchase contract for complex custom-built machinery. This test allows you to ensure that the machine complies with your specifications and safety requirements at the factory premises before shipping. Furthermore, FAT prevents expensive delays in installation, on-site reworking, and prolonged arguments over who will pay for the necessary changes.
For paper straw packing, BOPP (Biaxially Oriented Polypropylene) film and environmentally friendly paper wrapping materials are the most suitable options. The reason is the high transparency, low electrostatic charge, good slip properties, and heat sealing at low temperatures of BOPP film.
