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J/120 Specification

 


SCRIMP
Construction

What’s Unique About SCRIMP Construction?
Tests conducted by the US Naval Surface Warfare Center at Carderock, MD established that the properties of laminates produced by the SCRIMP resin-infusion process are superior to low-energy pre-pregs used by many custom boat shops and twice the strength of hand lay-up. In our judgment, SCRIMP construction greatly reduces the chances of warranty claims due to laminate failures resulting over time from pounding into waves and/or rig tension or ballast loads.


SCRIMP Process The entire laminate is placed in the mold dry. A high vacuum eliminates any air voids, then resin feed tubes draw in only enough resin to "wet" the laminate. This is the patented SCRIMP resin-infusion process. As can be seen from the chart above, SCRIMP laminate properties in terms of compression strength, flexure, and tension are twice the strength of hand lay-up and significantly stronger than low energy (vacuum bagged) post-cure pre-pregs. There is no entrained air in a SCRIMP laminate. It only takes 1% void content to reduce flexural strength by 10%!   See the comparison of composite properties of low cost fabrication methods in the chart above.

Bonded Hull/Deck Joint
Extremely strong and watertight hull-to-deck joints are created by chemically bonding the hull/deck flange overlap with 3M 5200 and Plexus adhesive. This innovation, used on each new J/Boat since the introduction of the J/105, yields a bond that is proven superior in strength to a conventional bolted joint with 3M 5200, with less opportunity for leaks, and less weight on deck. It is an ABS tested and approved construction process.  Essential hardware elements along the deck edge are bolted through this joint and sealed with Sikaflex bedding compound. Each flange (hull & deck) is supported with extra glass laminates and designed to withstand high local area stresses from stanchions, rails, & blocks.

 

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