Hunter Marine Model 170 - ACP Hull Construction

ACP is the most modern production boat building method being used today. It starts on the outside with a tough outer shell that is both weather and scratch resistant. The outer layer is then backed up with a high density urethane foam to add stiffness and impact resistance. The entire structure is strengthened by a layer of knitted biaxial fiberglass bonded inside the foam.

Finish - ACP and BASF plastic called LURAN-S

The outer layer of ACP is a BASF plastic called LURAN-S. This plastic is specially formulated to provide a beautiful glossy finish that is very easy to maintain. Dirt and grime is easily removed without the use of harsh chemicals. The finish will never develop the crazing associated with gel-coat and since the color goes so deep into the outer layer, scratches can be sanded out and buffed back to nearly new finish. This makes most minor damage easy to repair without using special techniques, resins, or paints. Since you can do this quickly and easily yourself, you’ll save money. But since the ACP structure is so much stronger than fiberglass, you’re much less likely to have to repair it to begin with.

Impact resistant boat surface

The outer plastic surface of the structure works in combination with urethane foam backing to provide nearly 5 times the impact resistance of traditional fiberglass. Instead of thin brittle coating on the outside, the ABS backed Luran-S plastic is both thick and flexible. When an ACP boat is struck by an impact, the outer skin will flex slightly to absorb the energy. Flexing is much better than breaking. Next, the urethane foam backing supports the skin and diffuses the impact energy through a large area. Finally, the fiberglass backing holds the structure intact, thus preventing significant damage. Where a fiberglass boat might have a large crack or hole, an ACP boat will suffer no more than a surface scratch.

Positive Flotation

Aside from it’s beautiful and durable finish, ACP construction provides yet another benefit. Safety. The foam backing that provides the structural rigidity, also makes the boat unsinkable. In the unlikely event an ACP boat is completely filled with water, it will still stay afloat. The material itself provides the positive flotation, eliminating the need for airbags or foam blocks inside the hull.

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