500*1000 mm High-Quality Eva Foam Filled Fender/polyurethane Buoy/marine EVA Boat Fender for Dock Protecting

High-Quality Eva Foam Filled Fender/polyurethane Buoy/marine EVA Boat Fender for Dock Protecting

Product Description:

Material Advantages:

Basic Information: The EVA foam-filled lifebuoy is a floating compression lifebuoy. It comes in various sizes, with diameters typically ranging from 500mm to 4500mm and lengths between 1000mm and 9000mm. The weight varies from 34kg to 21460kg. The color can be customized according to customer requirements.
Structure and Materials: The core is a high-tech, highly elastic foamed EVA. There is a spiral reinforcing structure in the middle and a polyurea coating on the outside. The surface is made of polyurea fabric, which is wear-resistant and has low friction resistance. The high-density foam filled inside can easily absorb energy.

Manufacturing Process:

The core of the production process is "core material molding → structural reinforcement → outer layer protection → accessory assembly → inspection and shipment," with each step interconnected to ensure product strength, buoyancy, and weather resistance:

1. Raw Material Pretreatment and Preparation
The foam core material raw material (EVA or polyethylene granules) must be dried to remove moisture and prevent pores after molding.

The outer protective layer raw material (polyurea resin, curing agent) is mixed and stirred in a specific ratio to ensure uniform composition; the reinforcing layer (nylon fiber mesh) is cut to specifications matching the fender dimensions.

End accessories (hot-dip galvanized steel flanges, chain links) undergo surface cleaning to remove oil and impurities, ensuring sealing during subsequent assembly.

2. Foam Core Material Molding
The pretreated foam raw material is placed into a specialized mold and heated and pressurized through molding or injection molding processes to melt, foam, and solidify the material.

During the molding process, temperature (typically 80-120℃) and pressure are strictly controlled to ensure the foam forms a uniform closed-cell structure, guaranteeing buoyancy and elasticity.

After curing, demold the core material and trim the edges to remove excess material and ensure dimensional accuracy meets design requirements.

3. Reinforcing Layer Coating: Evenly wrap or cover the cut nylon fiber mesh onto the foam core material surface, ensuring a complete, wrinkle-free fit.

Some products have a special adhesive applied between the fiber mesh and the core material to enhance adhesion, prevent separation during subsequent use, and improve overall structural strength.

4. Outer Protective Layer (Polyurea) Spraying/Casting: Using high-pressure airless spraying equipment, evenly spray the mixed polyurea material onto the reinforcing layer surface to form a dense protective film.

During spraying, control the coating thickness (typically 3-5mm) to ensure no missed areas, pinholes, or other defects; some large fenders use a casting process to ensure uniform outer layer thickness.

After spraying, cure at room temperature (or accelerate curing at low temperature) to form a complete, wear-resistant, and corrosion-resistant protective structure.

5. End Fitting Assembly
Drill holes at both ends of the cured fender and secure the hot-dip galvanized steel flanges or chain links with bolts, adding sealing gaskets at the bolt connections.

Perform a secondary sealing treatment on the assembled parts by applying anti-corrosion sealant to prevent seawater from seeping into the interior and corroding the fittings or core material.

6. Finished Product Inspection and Finishing
Buoyancy Test: Submerge the fender in water to test its floating state, ensuring there are no issues such as sinking or tilting, and that the buoyancy meets design standards.

Strength Test: Simulate ship impact through impact testing to test the fender's elastic recovery capacity and structural integrity.

Appearance and Dimensional Inspection: Inspect the outer surface for scratches and damage, ensure dimensional deviations are within allowable limits, and verify the secure installation of fittings.

Defective products are repaired by grinding, repainting, or reassembling; qualified products are cleaned and labeled (with specifications, load-bearing capacity, and other parameters).

7. Packaging and Shipment
Wrap the finished fenders with stretch film to prevent scratches on the outer protective layer during transportation.

Package is prepared in batches according to order requirements or shipped unpackaged, with installation instructions and test reports provided.

Features:

Good floating performance:不受潮汐影响,能保持在理想水位,适用于潮差大的码头.
Safe and reliable: There is no internal air pressure, so there is no risk of deflation, burst or sinking. It is highly safe.
High durability: Compared with ordinary PVC inflatable fenders, it is more durable, has a longer service life, and its wear resistance is several times that of ordinary rubber and PVC fenders.
Environmentally friendly and beautiful: Safe and environmentally friendly without pollution, the appearance is smooth and beautiful, and the colors are rich.
Low maintenance cost: No need for inspection and inflation, it has good resistance to seawater, acids and alkalis.

Technical Parameters:

Applications:

Ports and Terminals
As the core anti-collision facilities for wharf berths, bridge piers, and breakwaters, they protect the dock structure and the hulls of berthing vessels from collision damage. These are standard products for commercial ports, fishing ports, and yacht docks.
Ship Accessories
Installed on the sides of ships, they are used for side-by-side berthing of ships (such as for transfer operations) or for the contact buffering between ships and the dock. They are suitable for various types of ships, including cargo ships, oil tankers, ferries, and yachts.
Ocean Engineering
Applied to the anti-collision protection of offshore platforms, wind turbine foundations, and bridge piers of cross-sea bridges, etc., to resist the impact of passing ships and ocean waves.
Inland Waterway Transportation
Suitable for inland ports, locks, and ferry crossings, they meet the anti-collision requirements for berthing of inland vessels and adapt to the freshwater environment and complex navigation conditions of inland rivers.

Support and Services:

After-sales consultation: We provide 24/7 customer service to answer customer questions regarding anchor chain usage, such as  specification selection, usage methods, and maintenance points.

Regular follow-up visits: The manufacturer may conduct regular follow-up visits to customers to understand the  usage and collect customer feedback in order to continuously improve product quality and service levels.

Maintenance guidance: The manufacturer or professional organizations will provide customers with  maintenance guidance, including regularly checking for deformation, rust,; 

Any question please let us know ,our JinCheng maritime will provide you the best service with 7*24 hours ~