Please allow at least 4mm in your cutting allowance calculations for the width of the saw cut
We use table saws and horizontal band-saws, so edges will have a sawn finish
We only use sawing equipment, so we are unable to offer high precision items
Tolerances are +2mm to minus 0mm
We aim to cut as squarely as possible although incoming materials are sometimes out of square
We are unable to cut or machine shapes but we are happy to obtain a custom quotation for machined shapes or parts (please call us on 0114 2560889)
How to advise your sizes:
Please checkout your basket/cart
Fill in your details as usual on the checkout page
At section 5 of our checkout page, there's a "customer notes" box for you
Please enter your sizes and any notes for us there
Polypropylene Sheet Tolerances
Manufacturers produce engineering plastics that are slightly oversize in either diameter and/or thickness.
This oversize tolerance, which is listed in the tables below, is provided to assist customers to produce very accurate items within the size shown and remove any minor surface imperfection.
Nominal Thickness
Tolerance in mm
1
-0.08 to +0.0.8
1.5
-0.10 to +0.10
2
-0.11 to +0.11
3
-0.14 to +0.14
4
-0.17 to +0.17
5
-0.20 to +0.20
6
-0.23 to +0.23
8
-0.29 to +0.29
Nominal Thickness
Tolerance in mm
10
-0.35 to +0.35
12
-0.41 to +0.41
15
-0.50 to +0.50
20
-0.65 to +0.65
25
-0.80 to +0.80
30
-0.95 to +0.95
40
-1.28 to +1.28
50
-1.58 to +1.58
Polypropylene Sheet
Product Information
Product Full Identity:
Polypropylene Homopolymer
PPH is light weight (SG 0.91) has improved chemicalresistance, stiffness, improved higher working temperature compared to PPC (0°C to +100°C). PPH retains its low water absorption, is easily weldable and food compliant.
There are two grades of Polypropylene Sheet, Co-polymer and Homo-polymer. Co-polymer has some HDPE mixed into it to give it more flexibility and impact resistance. Homo-polymer is the sheet grade that is pure Polypropylene.
The main advantage would be it's acid resistance. Polypropylene Sheet has excellent acid and chemical resistance. It is also resistant to Sulphuric Acid. Another advantage would be it's low cost, Polypropylene is one of the lowest priced engineering plastics around. Polypropylene Sheet also has high impact resistance as some customers have used it as a backing board when punching gaskets or cardboard shapes. It is also very lightweight and is our only plastic that will float.
Polypropylene Sheet does have a few characteristics that should be raised. It can be more difficult to machine due to its low melting point, extra care is needed to avoid cutters or drills generating too much heat as it melts at 130°C. Bonding Polypropylene Sheet is also problematic, it can be done but we understand it could be a specialist process with limited success. A reason why most fabrication companies use plastic welding equipment. Another key characteristic is its fire resistance, Polypropylene Sheet has a HB fire rating which is very poor due to it's flammability and tendency to drip making it a poor choice for some cladding applications. Availability in terms of colours is pretty basic when it comes to the Homo-polymer grade as that grade is only available in natural and beige colour. Co-polymer grade Polypropylene Sheet is however available in many colours to suit requirements.
Many applications would include: Acid and chemical tanks, industrial chopping boards, some cladding applications as well as many prosthetic components.
Yes. Polypropylene sheet is highly weldable and can be fabricated using hot gas and extrusion welding techniques. This makes it a popular material for chemical tanks, ducting, pipework, and custom-fabricated industrial equipment.
Yes. Polypropylene sheet offers excellent resistance to many acids, alkalis, and corrosive chemicals, making it a widely used material for chemical tanks, bunds, and containment systems.
Yes. Polypropylene Homopolymer (PPH) is food compliant and is commonly used for food processing equipment, preparation surfaces, and handling applications where hygiene is important.
Polypropylene can be used outdoors for many applications, but prolonged exposure to UV light may affect standard grades over time. For long-term outdoor use, UV-stabilised grades may be recommended depending on the application.
Yes. Polypropylene sheet offers excellent corrosion resistance and is often chosen as an alternative to metal in environments where moisture, chemicals, or aggressive cleaning agents are present.
Polypropylene sheet is widely used in the chemical processing, water treatment, food manufacturing, medical, laboratory, and fabrication industries due to its chemical resistance, low weight, and ease of fabrication.
Yes. Polypropylene sheet can be cut, drilled, routed, and machined using conventional fabrication equipment. It is often used to produce custom components, guards, covers, and fabricated assemblies.
Polypropylene is generally lighter, offers excellent chemical resistance, and is easier to weld than PVC. PVC may offer greater rigidity in some applications, so the best choice depends on the operating environment and performance requirements.
Yes. Polypropylene has good electrical insulating properties and is commonly used in applications where electrical resistance and non-conductive performance are required.
Polypropylene sheet is commonly available in natural and black grades, depending on the application and stock availability. Direct Plastics offers Polypropylene sheet in natural and sample options in both natural and black variants.
Polypropylene combines low weight, chemical resistance, food compliance, weldability, and affordability. These properties make it one of the most widely used plastics for fabricated industrial equipment and custom-built components.
Yes. Polypropylene is commonly used in water treatment systems because it resists corrosion, does not absorb water, and can be fabricated into tanks, vessels, and process equipment.
Polypropylene sheet is lightweight, corrosion resistant, chemically resistant, and easier to fabricate than many metals. It can also help reduce maintenance costs in aggressive industrial environments.
Yes. Polypropylene is commonly used in medical and laboratory environments due to its chemical resistance, ease of cleaning, and suitability for fabricated equipment and containers.