What are the advantages and disadvantages of Natural Rubber?
Answers
Explanation:
Advantages: Latex is ready to use right out of the container.Latex is inexpensive, it exhibits good abrasion resistance, and is an elastic mold rubber. Because of its high elasticity, a feature unique to latex is its ability to be removed from a model like a glove.Latex molds are also good for casting wax and gypsum.
Disadvantages:Low-cost latex products generally shrink. Making molds with latex rubber is slow and time-consuming. Making a brush-on latex mold takes ten days or more.Latex molds are generally not suitable for casting resins.
2. Polysulfide rubber
Advantages: Polysulfide molds are very soft, “stretchy” and long lasting, some ven lasting 40 years old.It is good for making molds with severe undercuts and/or very fine detail.
Disadvantages: Has offensive odour. Polysulfides must be mixed accurately by weight or they will not work. Polysulfide rubber costs higher than latex.
3.Silicone rubbers:
Advantages: Silicone rubber has the best release properties of all the mold rubbers. The combination of good release properties, chemical resistance and heat resistance makes silicone the best choice for production casting of resins.
Disadvantages: Silicones are generally high in cost.They are also sensitive to substances, and do not have a long library life.
4. Polyurethan rubbers:
Advantages: Polyurethanes are easy to use, with many having a simple mix ratio by volume.They are less expensive than silicones and polysulfides
Disadvantages: As silicone rubber has the best release properties, urethane rubber has the worst release properties and will adhere to just about anything.Limited shelf life after opening – remaining product may be affected by ambient moisture in the air.
Answer:
Explanation:
Disadvantages..
Low temperature properties.
Higher raw material prices.
Does not apply to hot water being.
Cannot be used in power transmission systems.
Advantages...
less buildup of heat from flexing
greater resistance to tearing when hot
good dynamic performance
low level of damping
Hope it helps