Fishing net tensile strength testing to ISO1805 and ISO1806

Solution

• Software-controlled tensile tester.
• Bollard grips matched to rope diameter.

Benefits

• Consistent batch testing with touchscreen control.
• Customizable software for test methods and reporting.

Requirement

Fishing nets are essential in commercial and aquaculture use, yet failure during operation can cause financial loss and environmental damage through “ghost nets.” Ensuring mechanical strength is therefore critical.

Manufacturers must evaluate yarn and mesh performance under harsh marine conditions, including load variation, temperature, and contamination. Treatments like coatings may improve durability, but must be validated for strength impact.

Users also need to assess in-service nets for strength loss and elongation to determine usability.

ISO 1805 defines testing of yarn breaking and knot strength, while ISO 1806 covers mesh breaking force.

Solution

A tensile tester is used to measure yarn and mesh strength under controlled loading. Mesh samples are prepared with a central cell and tested between pins at fixed spacing.

Bollard grips hold the material securely while minimizing stress concentration. Force is applied at a constant rate until failure, and peak values are recorded across multiple samples.

The system also measures elongation (mm and %) and generates detailed reports. It can be configured for both mesh (ISO 1806) and yarn testing (ISO 1805), providing a complete evaluation solution.

Test equipment

• Software-controlled tensile tester.
• Load cell matched to the force range.
• Bollard grips for yarn size.

Test standards

• BS EN ISO 1806
• ISO 1805