Repairing a fishing net is not only about closing the hole.
The repair twine must also work with the original net.
If the repair material is too different, the repaired zone may become:
Too stiff
Too tight
Too heavy
Difficult to knot
Structurally unbalanced
The key principle is:
Repair twine should be compatible with the original net, not simply thicker or stronger.
First confirm the material of the damaged net.
Common materials include:
PE
PP
Nylon
Polyester
Where practical, repair twine should be selected with material compatibility in mind.
Different materials can behave differently under:
Water exposure
Repeated loading
Bending
Knotting
Repair twine should be reasonably close to the original twine diameter unless the repair design specifically requires another size.
If the repair twine is much thicker, the repaired area may become locally stiff.
If it is much thinner, it may not match the intended repair construction.
Measure the original net at several healthy locations rather than relying only on one worn point.
Diameter alone is not enough.
Compare whether the twine is:
Twisted
Braided
Monofilament
Multifilament
Also check strand or filament construction where relevant.
Two twines with similar diameter can behave very differently if their construction is different.
A repair twine that is much stiffer than the original mesh may create a hard patch.
This can cause nearby original meshes to deform more during loading.
Compare:
Bending feel
Knot behavior
Recovery after bending
Hand feel is only a screening method, but a major difference should be investigated.
Repair twine must form stable repair knots with the existing net.
During a trial repair, observe whether the knot:
Tightens properly
Holds its shape
Slips easily
Creates excessive bulk
A repair material that is difficult to knot consistently may be unsuitable even if its nominal diameter is correct.
After a small trial repair, inspect the surrounding mesh.
Look for:
Compressed meshes
Over-opened meshes
Twisted repair edges
Local gathering
The repaired section should integrate with the original mesh without forcing it into an unnatural geometry.
A very strong, thick repair twine may appear safer.
But if the patch becomes much stiffer than the surrounding net, load may concentrate around the repair boundary.
This can contribute to future damage beside the patch rather than inside it.
Compatibility is therefore a load-transfer issue, not only a strength issue.
Repair twine should not be selected only from the original factory specification.
An older net may already have changed through:
Abrasion
Aging
Fouling
Repeated repairs
The repair method must consider the actual condition of the surrounding mesh.
Healthy anchor mesh is important.
Where possible, keep:
Original production twine
Approved repair twine
Previous successful repair sample
These provide a useful reference for repeat repairs.
This is more reliable than selecting repair material by color or appearance alone.
For important fish cage nets, make a small trial repair before using a new repair twine extensively.
Check:
Knot stability
Flexibility
Mesh geometry
Repair-edge behavior
Then reinspect the repair after it experiences realistic operating load where practical.
Compare:
Material
Twine diameter
Twine construction
Strand or filament structure
Flexibility
Knot behavior
Mesh geometry after repair
Surrounding net condition
Investigate further when:
Repair area becomes much stiffer
Knots slip
Repair edges pull surrounding mesh
Patch geometry differs strongly from original mesh
Damage repeatedly develops beside previous repairs
A stronger repair twine may seem like the safest choice.
But the fishing net functions as a flexible structure.
If one small repair zone becomes much stiffer than everything around it, the load path can change.
That is why repair selection should consider:
Strength + Diameter + Construction + Flexibility + Knot Behavior + Surrounding Net Condition
not strength alone.
The goal of repair is not to create the hardest possible patch.
It is to restore the damaged area while maintaining compatible load transfer.
The key principle is:
The Best Repair Twine Is the One That Matches the Original Net Closely Enough to Work With It, Not Against It.
At PL Fishery, we manufacture fishing nets, fish cage panels, aquaculture netting, repair mesh, repair twine, reinforced borders, attachment loops, custom seams, marine ropes, chicken nets, and customized net products.
To purchase repair twine or replacement mesh, send PL Fishery your original net material, mesh size and measurement method, twine diameter, twine construction, damage location, repair dimensions, photos, quantity, and operating application so our factory can help prepare a compatible repair specification.https://plfishery.com/
