Equipment: Kayak Construction Materials
Kayaks are typically made from one of four different types of material.
Each material offers advantages and disadvantages. The types listed
below are arranged by cost.
Polyethylene Boats
The least expensive, heaviest and generally most
popular kayaks are made from polyethylene. Most novices and first
time buyers will feel right at home in a polyethylene kayak. These
plastic boats are strong, durable and able to withstand the abuse
of being dropped, run into and grounded on oyster bars. Because
of its resistance to dings and dents, most whitewater kayaks are
made from plastic.
Plastic boats (often called Tupperware) are rotomolded,
a process where powdered or beaded polyethylene is poured into a
mold and placed in a oven. The mold is heated and spun to distribute
the plastic evenly. After the kayak "bakes", the mold
is removed from the oven, allowed to cool and the kayak is completed
with seat, foot braces and other parts.
Wood Boats
If you're good with hand tools, have the time and don't mind repairs
every so often, a wooden kayak may be just the boat for you. Wood
kayaks are made from marine plywood covered with epoxy or fiberglass.
Wood is light in weight and attractive, but tends to damage more
easily than plastic or composite boats. Wood boats are not a good
choice for Florida kayakers because of the harsh environment. Sand,
sun and saltwater will all take their toll on wood kayaks.
Composite Boats
Fiberglass and Kevlar are the two most common materials found in
composite boats. Fiberglass is an ideal material for kayaks as it
is light in weight and fairly resistant to damage. Fiberglass boats
are about 10% lighter than plastic and can be patched easily with
duct tape. Kevlar is DuPont's name for a synthetic fiber called
Aramid. The material has been popularized by it's use in bulletproof
vests. Kevlar boats typically run twice as much as fiberglass, but
offer weight savings and strength advantages. Both types of composite
boats are coated with gelcoat, a glossy layer that makes the boat
look attractive and reduce water resistance.
Skin Boats
The first kayaks were skin boats. These were used by arctic North
Americans and made of seal skins stretched over an assembly of animal
bones or wood. Skin boats today are made with wood or aluminum frames,
a Hypalon rubber hull and nylon or canvas deck. The advantages of
the modern "skin" boat is that it can be assembled or
disassembled in as little as 30 minutes. Skin boats are a perfect
match for those who require a kayak that stores in little more space
than a backpack or someone who wants to transport their kayak on
passenger aircraft. Skin boats are not cheap and can cost 50% more
than their fiberglass counterparts. Skin boats are rarely seen on
any Florida waters.
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