Waterproof Parka Technologies
Detailed description of our fleece fabric….
Our fleece that goes into every Boat Coat, Swim Parka and Dive Parka we make is made exclusively for our use according to our exact specifications. Fleece is a soft, lightweight, warm and comfortable fabric. It is hydrophobic, holding less than 1% of its weight in water, it retains much of its insulating powers even when wet, and it is highly breathable. Made from 100% polyester, which is usually recycled materials, it is one of the most technical fabrics on the market. Surf-fur fleece gives the wearer maximum protection from blustery conditions in a lightweight packable fabric. These fabrics combine the warmth of fleece with a
100% windproof, waterproof, breathable
barrier, eliminating the need for a windbreaker or other additional shell. It is a good alternative to wool.
More information for the Scientists….
If it is breathable, how is it waterproof? Well, the fabric is actually two layers of fleece bonded together by a membrane called Polytetrafluoroethylene, or PTFE, which allows a small amount of air through the fabric (15cfm) to substantially improve breathability, without significantly compromising the fabric's warmth, reducing the tendency for heat stress buildup during aerobic activities. A water resistant outer surface and an inner surface treated to wick, provide all-in-one comfort and protection.
(FYI- Light-weight fabric is approximately 315 gsm, Mid-weight fabric is approximately 341 gsm, and heavier fabric is approximately 397 gsm)
Even more information for our Mensa customers….
Given the properties of water, a large droplet of water would not be able to fit through the miniscule opening of the PTFE, but water vapors (hence perspiration) will be able to escape through the holes allowing the fabric to breathe.
In chemistry, polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene which finds numerous applications. PTFE is most well known by the DuPont brand name Teflon.
PTFE is a fluorocarbon solid, as it is a high molecular weight compound consisting wholly of carbon and fluorine. Neither water and water-containing substances nor oil and oil-containing substances are wet by PTFE, as fluorocarbons demonstrate mitigated London dispersion forces due to the high electro negativity of fluorine. PTFE has one of the lowest coefficients of friction against any solid.
PTFE is used as a non-stick coating for pans and other cookware. It is very non-reactive, partly because of the strength of carbon–fluorine bonds, and so it is often used in containers and pipework for reactive and corrosive chemicals. Where used as a lubricant, PTFE reduces friction, wear and energy consumption of machinery.
PTFE is a thermoplastic polymer, which is a white solid at room temperature, with a density of about 2.2 g/cm3. According to DuPont, its melting point is 327 °C (621 °F), but its properties degrade above 260 °C (500 °F). PTFE gains its properties from the aggregate effect of carbon-fluorine bonds, as do all fluorocarbons.
Other Uses for PTFE
(Disclaimer* this does not necessarily mean these are other uses for your Water Parka)
Powdered PTFE is used in pyrotechnic compositions as oxidizers together with powdered metals such as aluminum and magnesium. Upon ignition, these mixtures form carbonaceous soot and the corresponding metal fluoride, and release large amounts of heat. Hence they are used as infrared decoy flares and igniters for solid-fuel rocket propellants.
PTFE is also used in body piercings, such as a sub clavicle piercing, due to its flexibility and biocompatibility.
In optical radiometry, sheets made from PTFE are used as measuring heads in spectroradiometers and broadband radiometers (e.g. illuminance meters and UV radiometers) due to its capability to diffuse a transmitting light nearly perfectly. Moreover, optical properties of PTFE stay constant over a wide range of wavelengths, from UV up to near infrared. In this region, the relation of its regular transmittance to diffuse transmittance is negligibly small, so light transmitted through a diffuser (PTFE sheet) radiates like Lambert's cosine law. Thus, PTFE enables cosinusoidal angular response for a detector measuring the power of optical radiation at a surface, e.g., in solar irradiance measurements.
PTFE is also used to coat certain types of hardened, armor-piercing bullets, so as to prevent the increased wear on the firearm's rifling that would result from the harder projectile.
PTFE's low frictional properties have also been used as 'feet' for computer mice such as the Logitech G5, Logitech G7 and Logitech G9 series and most Razer gaming mice (e.g. the Deathadder, Lachesis, etc.). The low friction provided by PTFE allows the mice to glide across surfaces more smoothly and with less effort.
PTFE's high corrosion resistance makes it ideal for laboratory environments as containers, magnetic stirrer coatings, and as tubing for highly corrosive chemicals such as hydrofluoric acid, which will dissolve glass containers.
PTFE is also widely used as a thread seal tape in plumbing applications, largely replacing paste thread dope.
PTFE grafts can be used to bypass stenotic arteries in peripheral vascular disease, if a suitable autologous vein graft is not available.
PTFE can be used to prevent insects climbing up surfaces painted with the material. PTFE is so slippery that insects cannot get a grip and tend to fall off. For example, PTFE is used to prevent ants climbing out of formicaria.
*Please do not use your Water Parka near an open flame, burn them in your oven, or use a kindling if you are camping. Burning of synthetics releases vapors are harmful to the environment.
*All information on PTFE taken from Wikipedia.com