Views: 0 Author: Site Editor Publish Time: 2026-10-13 Origin: Site
New lines of PLA straws do not normally encounter problems with the machinery. They encounter problems with the facility around the machinery.
You buy a brand new extrusion line, and you’re expecting it to arrive on time, but when you install it, you realize the workshop lacks three-phase power, cannot sustain stable water temperature, or has no dry area to keep the plastic. This is not a problem with the machinery; it is a readiness problem that can easily be avoided if prepared for in advance.
This guide walks you through what a PLA straw production line actually needs from your building: power, water, compressed air, drying capacity, climate control, and floor space. Think of it as the checklist to hand to your electrician, your plumber, and whoever’s drawing up your factory layout.
If you’ve run a PP straw line before, don’t assume the utility requirements carry over. PLA behaves differently at almost every stage:
It absorbs moisture from the air: even a few hours of exposure can introduce enough humidity to ruin a batch, so drying and sealed storage aren’t optional extras.
It has a narrower processing temperature window: push it too hot and it degrades; too cool and it won’t extrude cleanly. That makes stable power and precise heater control more important than with PP.
It cools and sets more slowly: which means your cooling water needs to do more consistent work to lock in diameter and wall thickness.
Power is usually the first thing people underestimate, and the first thing that stalls an installation.
Start by adding up the connected load: Every motor, heater band, vacuum pump, chiller, and controller on the line has a rated power draw. Sum them to get the connected load, then talk to your supplier about the realistic running load, since not everything pulls full power at the same time. Undersizing your incoming supply here is one of the most common (and most expensive to fix) planning mistakes.
Confirm voltage, phase, and frequency before you order anything: PLA extruders are usually designed for the use of three-phase power. However, there are certain differences regarding voltage and frequency (either 50 Hz or 60 Hz). These details should be clarified with the supplier in advance because otherwise you will have to buy the transformer or converter for your machine.
Pay attention to supply stability, not just capacity: Precise heater control is required to maintain the barrel and die temperatures in PLA extrusion. Thus, an unreliable supply of electricity with constant voltage drops and surges will make this process harder, resulting in inconsistent diameter of straw and shorter service life of your equipment.
Think about what a power interruption does mid-run: A sudden stop isn’t just an inconvenience with PLA. PLA resin might degrade while staying in the heated barrel. Clearing up the jammed or scorched barrel takes time and materials. Thus, if power failures occur often in your region, a generator is highly recommended.
This is where most folks mess up, thinking it's "all just water," as PLA will quickly correct that misconception.
After the straw comes out of the die, it needs to cool down and solidify until it can be pulled off. If the cooling is not even, the straw will not be circular in shape, but oval, with wall thickness being different at both ends of the straw.
For the workshop itself, here’s what you need:
A stable water temperature, not just a water source: tap water or an inexpensive cooling tower can’t maintain a consistent temperature throughout a work shift, especially in warm conditions. A special chiller is the conventional means used for PLA lines since it maintains the temperature of the sizing tank irrespective of external environmental conditions.
Adequate flow rate: verify that the required flow rate (as opposed to chiller’s capacity) is adequate for the particular line. An undersized plumbing system piped to a narrow pipe diameter will create a bottleneck in spite of the correct chiller size.
Clean, filtered water: hard and/or contaminated water scales and eventually blocks small passages inside the sizing tank, thus gradually reducing the cooling efficiency until one starts observing poor straw formation.
A closed loop where possible: circulating water back to the chiller rather than discharging it ensures better water utilization and temperature stability.
Floor drainage near the tank: for spill control and for routine maintenance when the tank needs draining or cleaning.
Compressed air may not be the star of the show on your straw line, but leaving it out of your plan is going to create some serious headaches.
You will require compressed air for the pneumatic cutting unit and for the actuators and seals for the packing machines. There are two aspects to this:
Pressure and volume: Find the pressure and volume requirement for your specific cutter and packing machine and size your compressor with some margin, as opposed to operating it at full capacity all the time.
Dry, clean air: Contaminants such as water or oil can affect the cutting mechanism; furthermore, when dealing with food-grade straws, the air can have an impact on hygiene. The dryer and filter are part of the compressor air line.
The vacuum pump for the sizing tank is another case altogether. It needs to be sized separately from the air compressors and, due to the fact that it is in constant operation, should be taken into account in terms of noise and exhaust routing.
Here’s the problem with PLA that almost always catches everybody who switches from PP by surprise – it’s hygroscopic, which means it draws moisture directly from the atmosphere. Extrude moist PLA and you’re looking at bubbles, fragile straws, thin walls, or poor finish despite all the other settings on the extruder being just right.
Make sure there is sufficient space and power available for the drying process to take place. A dehumidifying dryer, together with a hopper loader, must be used before the material is fed into the extruder. The moisture content required depends on the specific type of your resin blend, so make sure to check the data sheet provided by the supplier.
Give raw material storage real thought, not just a corner of the warehouse. A few basics:
Keep resin sealed: opened bags exposed to humid air start absorbing moisture within hours, so reseal anything you’re not using immediately.
Store pallets off the floor: ground-level moisture and temperature swings are worse than you’d think, especially in humid climates.
Control moisture in the storage area itself: not only the manufacturing floor.
Use first-in-first-out handling: so resin doesn’t sit around longer than it needs to before it gets dried and used.
Keep the drying station near the extruder hopper. Resin that needs to travel long distances or remain open before going into the hopper will start absorbing water once again, making the process of drying it useless. Do keep in mind to leave some space around the drying station for working with bags and loaders.
The room itself is part of your process, whether you planned for that or not.
Humidity is the biggest threat to the process, for the same reasons that storage of resins needs to be controlled. Moisture in the air is the opposite of what a drying machine wants to accomplish, and that is why most problems related to PLA quality happen during humid periods and in humid climates. If you live in a place where this is a problem and operate your business in that climate, you can buy dehumidifiers for your workshop, and it will be worth it.
Ventilation is an underestimated aspect. Your extruder barrel and your chiller generate heat, and you need ventilation so that all that heat won't get trapped inside the workshop, complicating your operation.
Cleanliness is not only important for the sake of it; since these are products for food contact, your customers and certifying organizations are starting to demand a clean environment for the manufacturing process, and this requirement may vary depending on which markets you want to sell.
Plan the full footprint, not just the extruder’s length: The entire process line, which includes the drying area through extrusion, cooling, cutting, and packing of the product, requires larger floor space than what could be imagined from the length of the extruder alone. You need clear space on either side for servicing and material movement.
Lay the line out in the order material actually flows: This means you have to begin from the receipt of raw materials and continue through the processes of drying, extrusion, cooling, cutting, packing, and end with the storage of the final products. Zig-zagging of the material flow wastes floor space and hampers operator efficiency.
Check your floor before you check anything else: Your process line will require an even and watertight floor, strong enough to withstand the machine weight, as well as the weight of the water in the cooling tank when fully loaded. Flooring problems cause vibration and misalignment, and troubleshooting will be quite problematic.
Don’t skimp on ceiling height: There should be adequate ceiling height for placing hopper loaders, overhead cable trays, and exhaust ducting among others.
Leave room for growth now, even if you’re starting with one line: Expanding later almost always means moving walls or utilities you just installed, which costs far more than planning an extra few meters of clearance from day one.
Typical crew requirements on each shift will be one person to monitor the extruder and the temperatures, another for cutting and packing of products, and another for loading and quality check of materials being used. Training is more important than staffing since an operator with an understanding of the importance of temperature and cooling controls detects any problem before it becomes waste.
On the safety side, a few things shouldn’t be optional:
Guarding on hot surfaces and rotating parts: The barrel, die, and haul-off rollers pose genuine risks of burns and entanglement.
Clear signage and emergency stops: Must be available at various locations on the line and not just at the control panel.
Fire precautions for resin storage: Plastic pellets are flammable materials and require proper fire protection measures.
A successful PLA straw line starts well before the first straw comes off the cutter. It starts with a workshop that’s ready for the power, water, air, and climate control the process actually needs.
If you’re planning a new installation, Sunrise Machinery can provide a site requirements sheet and layout guidance matched to your specific line, so you know exactly what to prepare before the machine ships. Contact us through our page to get started.
The typical PLA straw manufacturing line normally has a floor space of 8 to 12 meters long by 0.9 to 1.5 meters wide, which results into a floor area of about 8 to 18 sq. meters of equipment.
A commercial PLA straw extruder typically runs on 380V, 50Hz, three-phase power.
Yes, PLA needs to be dried before extrusion if it has absorbed moisture from the air, though it is less sensitive to moisture than materials like PETG or Nylon.
Time required for installation and commissioning varies depending on the size and complexity of the project. For example, small residential projects require 1 to 3 days for installation and a few hours up to 1 day for commissioning. Installation of medium scale projects requires 3 to 10 days for installation and 1 to 2 days per each zone. Large scale projects take 3 weeks to several months (or even 5-6 months or more for heavy industries).
