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Manufacturing services
CNC milling and turning · From 1 part
Diffuser and perforated plates, flanges, lids, bushings, brackets, tank and pipe parts and chemical equipment components in polypropylene, milled and turned from your file. Upload your CAD and order online, starting at a single part.
Diffuser plate
Polypropylene · Ø120 × 10 mm · 93 Ø5 holes · 4 Ø6.5 mounting holes · CNC milled
1 pc
$80.80 USD
per part
25 pcs
$19.36 USD
per part
-76.04%100 pcs
$16.98 USD
per part
-78.99%Polypropylene (PP) is a lightweight plastic that resists acids, bases and many chemicals. It weighs 0.90 g/cm³ —it floats in water—, barely absorbs moisture, works up to about 80–100 °C and takes repeated flexing without breaking. That is why it is used for perforated plates, flanges, lids, bushings and parts for tanks, piping and chemical equipment. At PREMSA we CNC mill and turn it from your file, starting at a single part with an instant price.
Polypropylene properties: mechanical, physical, thermal and chemical data to choose the material for your machined part.
Material Type
Semi-crystalline thermoplastic
Primary Characteristics
Excellent chemical resistance, lightweight, flexible, fatigue-resistant, cost-effective
Tensile Strength (Ultimate)
4,000–5,500 psi (28–38 MPa)
Yield Strength
3,500–5,000 psi (24–34 MPa)
Elongation at Break
200–600%
Impact Resistance
Good (varies with temperature)
Hardness
Shore D65–D75
Density
0.90 g/cm³ (very lightweight)
Elastic Modulus
150,000–200,000 psi (1.0–1.4 GPa)
Water Absorption
Very low
Moisture Sensitivity
Minimal
Continuous Service Temperature
~80–100 °C (176–212 °F)
Melting Point
~160–170 °C (320–338 °F)
Thermal Conductivity
~0.22 W/m·K
Machinability
Good: it is soft, so it is clamped without overtightening and cut with sharp tooling so it doesn’t deform
Chemical Resistance
Excellent (resistant to acids, bases, and many chemicals)
Fatigue Resistance
Excellent (ideal for living hinges)
Weldability
Excellent (plastic welding supported)
Common Forms
Sheet, plate and rod
Typical Applications
Perforated plates, flanges, lids, bushings, tank, piping and chemical equipment parts, industrial panels
Rating across key engineering and manufacturing criteria.
Strength
Weight
Machinability
Impact Resistance
Flexibility
Chemical Resistance
Thermal Resistance
Cost Efficiency
Upload your CAD file and get an instant price and delivery date. CNC milling and turning from one part to production.
We CNC mill and turn polypropylene parts that have to work with chemicals and water without corroding.
Diffuser and perforated plates
Flanges and lids
Bushings and spacers
Tank parts
Piping parts
Chemical equipment components
Brackets and guides
Industrial panels
Custom polypropylene parts
What people ask most about polypropylene parts: what it is, uses, machining, chemicals, temperature, strength, moisture, welding, food contact, weight, price and tolerances.
Polypropylene is chosen for parts that work with chemicals and water: perforated plates, flanges, lids and parts for tanks, piping and chemical equipment.
At PREMSA Industries we machine polypropylene with CNC milling and turning from your file, from a prototype to production.
Polypropylene is chosen when the part has to resist chemicals and weigh little.
If your drawing doesn’t specify tolerances, we machine to ISO 2768-m (medium). On dimensions you call out —holes, contours and fits— we can hold ±0.1 mm (±0.004 in), and critical dimensions are checked in inspection. Polypropylene is soft and expands with temperature, so tight dimensions are measured at room temperature.
Polypropylene is machined with CNC milling, CNC turning, drilling and tapping. It is soft: it is clamped without overtightening and cut with sharp tooling and good chip evacuation so it doesn’t melt or leave burrs. On plates with many holes, the drilling order is planned so the part doesn’t move.
Because it resists chemicals and weighs little, polypropylene is used in many parts made with CNC machining.
Polypropylene is usually the right choice when the part works with chemicals or water at moderate temperature.