Wednesday, 24 July 2013

understanding different resins

I wanted to make my own fiberglass tank but am confused with all the different resins out there


In the marine industry, liquid plastics, namely epoxies, polyesters, and vinylesters are used to saturate (wet out) the fibers of wood, glass, kevlar amarid, or carbon to form a fiber reinforced plastic (FRP).  To create a quality part, adhesion to the fibers is the most important factor.  Not all resins keep their grip on fibers equally.

Epoxy resin is known in the marine industry for its incredible toughness and bonding strength.  Quality epoxy resins stick to other materials with 2,000-p.s.i. vs. only 500-p.s.i. for vinylester resins and even less for polyesters.  In areas that must be able to flex and strain WITH the fibers  without micro-fracturing, epoxy resins offer much greater capability. Cured epoxy tends to be very resistant to moisture absorption.  Epoxy resin will bond dissimilar or already-cured materials which makes repair work that is  very reliable and strong.  Epoxy actually bonds to all sorts of fibers very well and also offers excellent results in repair-ability when it is used to bond two different materials together. Initally, epoxy resin is much more difficult to work with and requires additional skill by the technicians who handle it.


GP Resin
We specialize in providing an impeccable range of GP Resin. This general purpose resin finds its varied application in fiberglass plants, and marine recreational vehicles. This resin type is generally used because of its features such as low viscosity, medium curve and fast wet out. Available in colors, this range is used in varied forms by different industries. We are offering this resin in a very competitive pricing and in a legitimized manner.


ISO Resin
Our company is indulged in manufacturing a qualitative range of ISO Resin. This resin type finds its wide application in the manufacturing of a number of products such as tanks, pipes, containers, tools for the storage & protection of various corrosive materials and other products that require high mechanical strength, corrosion resistance and better durability. We provide our industrial patrons with this qualitative resin in a very economical pricing.


Roof Life Resin
We are a coveted firm engaged in the manufacturing of quality Roof Life Resin which is in great demand due to its diversified features. This range of resin has been specially fabricated to have a long term durability and provide optimal performance. This roof life resin is generally used in waterproofing of flat or inclined roofs. Due to this use, we offer these roof resins in translucent and decorative patterns. Some of its major features are:

UV stabilized resin
Durable
Perfect finish


Vinyl Ester Resin
Our offered range of Vinyl Ester Resin has been manufactured using best quality resin which has been procured from reliable vendors. Our this resin has been widely acclaimed by the users for its features such as strength and sturdiness as well as low resin viscosity of approximately 200 cps which is a bit lower than 500cp of polyester and 900cps of epoxy. Its major application is in a number of glasair and glastar kit planes along with being used in marine equipments.



Pigment Resin
We are coveted in supplying and manufacturing a wide range of Pigment Resin to our varied clients. This pigment resin is widely applies in making & composition of various kind of products such as paints, inks, plastic, glass, synthetic fibers, ceramics, colored cement products, textiles and cosmetics. We are also into manufacturing polymer base concentrate such as LDPE/ LLDPE/ PVC. These pigments are available with us in a variety of colors and shades that are all use din addition to various plastic and other products.


Vinylester resins are stronger than polyester resins and cheaper than epoxy resins. Vinylester resins utilize a polyester resin type of cross-linking molecules in the bonding process.  Vinylester is a hybrid form of polyester resin which has been toughened with epoxy molecules within the main moleculer structure.  Vinyester resins offer better resistance to moisture absorption than polyester resins but it's downside is in the use of liquid styrene to thin it out (not good to breath that stuff) and its sensitivity to atmospheric moisture and temperature.  Sometimes it won't cure if the atmospheric conditions are not right.  It also has difficulty in bonding dissimilar and already-cured materials.  It is not unusual for repair patches on vinylester resin canoes to delaminate or peel off.   As vinylester resin ages, it becomes a different resin (due to it's continual curing as it ages) so new vinylester resin sometimes resists bonding to your older canoe, or will bond and then later peel off at a bad time. It is also known that vinylester resins bond very well to fiberglass, but offer a poor bond to kevlar and carbon fibers due to the nature of those two more exotic fibers.  Due to the touchy nature of vinylester resin, careful surface preparation is necessary if reasonable adhesion is desired for any repair work. 
Polyester resin is the cheapest resin available in the marine industry and offers the poorest adhesion, has the highest water absorption, highest shrinkage, and high VOC's.  Polyester resin is only compatible with fiberglass fibers and is best suited to building things that are not weight sensitive.  It is also not tough and fractures easily. Polyesters tend to end up with micro-cracks and are tough to re-bond and suffer from osmotic blistering when untreated by an epoxy resin barrier to water.  This is really cheap stuff.

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