Ethylene Vinyl Acetate (EVA) and Polypropylene (PP) are the two most quoted options for agricultural plastic products in marine and offshore projects. Both are widely available, but they behave very differently once they are in service.
Everything here can be checked on a real sample before you commit to a production order.
This category covers a family of products rather than a single item. In practice a buyer defines agricultural plastic products by three things: the base resin, the format or dimension, and the performance or certification level it has to meet. Typical options in this category include greenhouse film 100 to 200 micron; silage and stretch film widths to 750 mm; shade net 30% to 95%. Materials most often specified are Polypropylene, Ethylene Vinyl Acetate, Polyvinyl Chloride, Low Density Polyethylene, and the choice between them changes stiffness, temperature resistance, chemical behaviour and price.
In the marine and offshore sector the decision is usually driven by UV and salt resistance and impact strength, with buoyancy as a secondary requirement. Typical end uses include hull panels, rope and netting, buoyancy floats.
Typical values for a general purpose grade are listed below; filled, stabilised and speciality compounds will differ.
| Material | Density | Tensile strength | Service temperature |
|---|---|---|---|
| Ethylene Vinyl Acetate | 0.93-0.95 g/cm³ | 10-30 MPa | -40°C to 70°C |
| Low Density Polyethylene | 0.91-0.93 g/cm³ | 8-20 MPa | -50°C to 70°C |
| High Density Polyethylene | 0.94-0.97 g/cm³ | 20-32 MPa | -50°C to 80°C |
Ethylene Vinyl Acetate is frequently the default selection here: Foamed EVA is the standard cushioning and buoyancy material in sports and marine products.
Ethylene Vinyl Acetate grades offer very flexible and elastic, while Polypropylene brings lowest density among commodity plastics. For marine and offshore service the difference shows up in UV stability and in the long term behaviour under load.
Both materials can be validated quickly with a small sample run, which is the cheapest way to settle the argument for your own application.
Beyond the base resin, most suppliers offer UV stabilised, food contact, flame retardant, anti-static and recycled content versions of the same product. Ask which additive package is included, because it is often the difference between a part that lasts three years and one that lasts ten.
Each step below has its own control points, and skipping one of them is where most defects start.
Secondary operations such as printing, welding, machining and assembly are often cheaper to do in the same factory, and they reduce the risk of mismatch between components.
Work through these points in order and most specification mistakes disappear.
Send this list to your supplier with the drawing and you will receive comparable quotations from every factory you contact.
Yes. Standard samples are normally free of charge and shipped within three working days; custom samples are charged at cost and credited against the first production order.
For standard sizes and colours the minimum is usually one pallet or one production run; for custom tooling the economic minimum depends on the tooling cost amortised over the expected volume. Send us your annual volume and we will calculate the break even point.
A new tool typically takes 25 to 45 days depending on cavity count and complexity, followed by T1 samples within one week. Existing tools can usually start production within 10 to 15 days of order confirmation.
Standard production tolerance follows the relevant ISO or DIN tolerance class for the process; tighter tolerances are possible after machining or grinding, but they add cost. Define the tolerance only on the functional dimensions.
Colour is controlled with a masterbatch reference approved by the customer, and every production lot is checked against the approved sample under standard lighting before shipment.
Our team supplies agricultural plastic products to marine and offshore customers worldwide, with samples, material certificates and full inspection reports available before mass production.
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