PP Drinking Straw Making Machine: How It Works, Types and What to Look For
Understanding how a drinking straw making machine works — and what separates one machine configuration from another — is the starting point for any buyer evaluating this type of equipment. A drinking straw making machine is a purpose-built extrusion line that converts raw polypropylene (PP) or polyethylene (PE) resin into finished drinking straws at high speed, with precise diameter, wall thickness, and length control built into every production cycle.
This guide explains how a PP drinking straw making machine works, the main types available, how plastic and paper straw machines compare, and what to look for when specifying a system for your operation. For context on how straw extrusion fits within the broader plastics manufacturing landscape, see: Plastic Recycling Line: Types & How to Choose →
What Is a Drinking Straw Making Machine?
A drinking straw making machine — more precisely, a drinking straw extrusion line — is a series of connected machines that melt PP or PE resin, form it into a hollow tube through a die, cool and solidify the tube, and then cut it into individual straws of a specified length.
The output is a uniform, finished drinking straw ready for packaging and distribution. A single PP drinking straw making machine can produce dozens to hundreds of straws per minute, depending on line speed and straw diameter.
These machines are used by:
- Straw manufacturers supplying foodservice distributors, restaurants, and packaging companies
- Plastic product factories diversifying into disposable and reusable straw production
- Recycled-content producers processing rPP pellets into eco-compliant straws
How a Drinking Straw Making Machine Works: Step-by-Step Process
The following stages explain how a drinking straw making machine works from raw resin input to finished straw output — and what happens at each stage that determines final straw quality.
Stage 1 — Raw Material Feeding
PP or PE pellets are loaded into a hopper above the extruder barrel. The resin must be dry and free-flowing — pellets with excess moisture will produce bubbles and surface defects in the finished straw. Most modern lines include a drying hopper to ensure consistent feedstock quality.
For striped or multi-colored straws, a secondary feeder introduces a contrasting colour material at the die head, producing the characteristic spiral stripe without affecting structural integrity.
Stage 2 — Extrusion and Melting
Inside the extruder barrel, a rotating screw conveys, melts, and pressurizes the resin through a combination of mechanical shear and controlled heat. Temperature zones along the barrel — typically 4–6 independently controlled sections — are set precisely to the resin’s melt temperature range.
PP typically runs at barrel temperatures of 200–230°C. Precise temperature control at this stage determines melt viscosity, which directly affects wall thickness uniformity in the finished tube.
Stage 3 — Die Head and Tube Forming
The melted resin is forced through a tube die — a precision-machined die head with a central mandrel and outer die that shapes the melt into a hollow tube. The gap between mandrel and die determines wall thickness; the outer die opening determines the outer diameter.
Die heads are interchangeable, allowing the same machine to produce straws of different diameters by swapping the die and mandrel assembly.
Stage 4 — Vacuum Calibration and Water Cooling
The extruded tube immediately enters a vacuum calibration tank filled with circulating water. A sizing sleeve holds the tube at the exact outer diameter while the vacuum draws the hot plastic against the sleeve walls, ensuring dimensional accuracy. The tube is simultaneously cooled from the outside by the water bath.
This stage is critical for achieving consistent outer diameter across the entire production run. Variations in vacuum pressure or water temperature cause diameter fluctuations that result in out-of-spec straws.
Stage 5 — Secondary Cooling
After calibration, the tube passes through one or more additional cooling tanks to reduce the tube temperature to handling level. Insufficient cooling at this stage causes the tube to deform under the tension of the haul-off unit.
Stage 6 — Haul-Off (Caterpillar Drive)
A haul-off unit — a pair of motor-driven caterpillar belts gripping the tube from both sides — pulls the extruded tube forward at a controlled, constant speed. The haul-off speed, relative to the extrusion speed, controls wall thickness: faster haul-off produces thinner walls; slower haul-off produces thicker walls.Understanding how a drinking straw making machine works at this stage helps buyers evaluate whether closed-loop speed control is included in the specification.
Line speed on SUHUI’s straw making machines reaches a maximum of over 250 m/min, enabling high-volume continuous production.
Stage 7 — Automatic Cutting
A flying-knife or rotary cutter cuts the moving tube into individual straw lengths without stopping the line. Cut length is set digitally and maintained precisely across continuous production. SUHUI’s drinking straw making machine supports straw lengths from 3 mm to 1,000 mm, covering the full range from cocktail picks to long bubble tea straws.
Stage 8 — Collection and Output
Cut straws fall into a collection bin or conveyor. Straws can be conveyed directly to a counting and packaging station, or collected in bulk for secondary packaging operations.
Drinking Straw Making Machine in Operation
The following video shows a SUHUI PP drinking straw making machine running at full speed, demonstrating the complete extrusion, cooling, cutting, and output sequence:
Types of Drinking Straw Making Machines
PP / PE Plastic Straw Making Machine
The most widely deployed straw making machine type. Uses polypropylene (PP) or polyethylene (PE) resin to produce the standard round-section drinking straw found in foodservice globally.
PP straws offer good heat resistance (suitable for hot beverages up to ~100°C when wall thickness is adequate), high clarity in the natural form, and full recyclability. PE straws are softer and more flexible, commonly used for juice and cold drink applications.
SUHUI’s PP/PE straw making machine range covers three models (JH01-245, JH01-250, JH01-255) with output capacities from over 25 kg/h to over 45 kg/h, supporting straw diameters from φ1 mm to φ14 mm.
Paper Straw Making Machine
Paper straw machines use a different manufacturing principle: kraft paper is wound in multiple layers around a mandrel, bonded with food-grade adhesive, cut to length, and dried. The output is a paper tube straw — biodegradable but with lower wet strength than plastic equivalents.
Paper straw machines are entirely different in mechanical design from plastic extrusion lines and serve a different market segment. The choice between plastic and paper straw production depends primarily on end-market requirements and local regulatory environment.
PLA / Biodegradable Straw Making Machine
PLA (polylactic acid) and other compostable bioplastics can be processed on modified extrusion lines equipped with temperature-controlled tooling suited to lower processing temperatures. These materials require tighter process control than standard PP but produce straws marketed as biodegradable alternatives. Market demand for PLA straws is partly driven by single-use plastic regulations — for regulatory context, see the EU Single-Use Plastics Directive.
Key Technical Specifications: SUHUI PP Straw Making Machine
| Specification | JH01-245 | JH01-250 | JH01-255 |
|---|---|---|---|
| Material | PP / PE | PP / PE | PP / PE |
| Straw Diameter | φ1–14 mm | φ1–14 mm | φ1–14 mm |
| Straw Length | 3–1,000 mm | 3–1,000 mm | 3–1,000 mm |
| Max. Output | >25 kg/h | >35 kg/h | >45 kg/h |
| Line Speed | >250 m/min | >250 m/min | >250 m/min |
| Main Motor | 5.5 kW | 7.5 kW | 11 kW |
| Colour Options | 1 colour + 1 stripe | 1 colour + 1 stripe | 1 colour + 1 stripe |
How to Choose a PP Drinking Straw Making Machine
1. Required Production Capacity
Match the machine’s rated output (kg/h) to your planned daily production volume. Factor in your planned operating hours and build in 15–20% headroom for maintenance windows and startup losses. Oversizing significantly increases capital cost without productivity benefit.
2. Straw Diameter and Product Range
If you plan to produce multiple straw sizes — cocktail straws (φ4–5 mm), standard drinking straws (φ6–8 mm), and bubble tea straws (φ10–12 mm) — confirm that the machine supports interchangeable die sets and that the drive system can maintain stable line speed across the diameter range.
3. Wall Thickness Control
Wall thickness determines both straw strength and material consumption per unit. Machines with closed-loop haul-off speed control maintain more consistent wall thickness across production runs than open-loop systems. Confirm what wall thickness tolerance the manufacturer guarantees for your specified diameter.
4. Cutting Precision
Straw length consistency is a quality requirement for both foodservice and automated packaging operations. Confirm the cutter type (flying knife vs. rotary), the achievable length tolerance, and whether the length setting is digital (repeatability) or mechanical (requires recalibration between runs).
5. Die Change Flexibility
If you intend to produce multiple straw types, the time required to change die sets between production runs affects your effective machine utilisation. Ask the manufacturer for the die change procedure and time estimate.
6. After-Sales Support
Straw making machines operate at high speed continuously. Wear components — cutting blades, vacuum calibration sleeves, haul-off belts — need to be available quickly. Confirm the manufacturer holds common spare parts in stock and can provide technical support for your installation.
Conclusion
Understanding how a drinking straw making machine works — from resin feeding through extrusion, vacuum calibration, haul-off, and cutting — is the foundation for choosing the right configuration. The right machine matched to your straw diameter range, output capacity, and product mix determines both production efficiency and finished straw quality.
SUHUI Machinery designs and manufactures PP/PE drinking straw making machines covering output capacities from 25 kg/h to 45 kg/h, with full die-set flexibility for straw diameters from φ1 mm to φ14 mm and lengths from 3 mm to 1,000 mm.
View the SUHUI PP Drinking Straw Making Machine →
Frequently Asked Questions
How are drinking straws made in a factory?
Drinking straws are made by a plastic extrusion process: PP or PE resin pellets are melted in an extruder barrel, forced through a tube die that shapes the melt into a hollow tube, cooled and sized in a vacuum calibration tank, pulled forward at controlled speed by a haul-off unit, and cut into individual straw lengths by an automatic flying-knife cutter. The entire process runs continuously at line speeds of over 250 m/min on modern machines.
What materials can a drinking straw making machine process?
Standard drinking straw extrusion lines are configured for polypropylene (PP) and polyethylene (PE) resins. PP produces rigid, heat-resistant straws suitable for both hot and cold beverages. PE produces a softer, more flexible straw commonly used for cold drinks and juice. Some machines can process PLA and other bioplastic resins with appropriate temperature adjustments, though these require modified tooling and tighter process control.
What is the difference between a PP straw making machine and a paper straw making machine?
A PP straw making machine uses plastic extrusion — melting resin and forming a hollow tube through a die. A paper straw making machine uses a winding process — layers of kraft paper are bonded and formed into a tube on a mandrel. The two machine types are mechanically different and are not interchangeable. PP straw lines offer higher production speed and lower material cost per unit; paper straw machines produce biodegradable output that complies with single-use plastic regulations in certain markets.
What straw diameters and lengths can SUHUI’s machine produce?
SUHUI’s PP drinking straw making machine supports straw diameters from φ1 mm to φ14 mm, covering cocktail straws, standard drinking straws, jumbo straws, and bubble tea straws. Straw length can be set from 3 mm to 1,000 mm. Die sets are interchangeable, allowing production of multiple straw sizes on a single machine.
How much does a drinking straw making machine produce per hour?
SUHUI’s three-model PP straw making machine range offers output capacities of over 25 kg/h (JH01-245), over 35 kg/h (JH01-250), and over 45 kg/h (JH01-255), at a maximum line speed of over 250 m/min. Actual output depends on straw diameter, wall thickness, and resin type. Contact SUHUI Machinery to calculate the daily output estimate for your specific straw specification.
Related Products
- PP Drinking Straw Making Machine — Full range: 25–45 kg/h output, φ1–14 mm diameter, 3–1,000 mm length
- Drinking Straw Making Machine — Detailed specification and model comparison