Custom cut and sized bands available to suit your needs. Understanding your application s , we will provide you with a competitive quote. Need it fast? Our sales teams specialize in helping to solve your problems. Call or contact Aero today! How Rubber is Made Compound The formula for a particular rubber band is the compound.
Durometer Measure of the hardness of rubber. The higher the durometer the harder the rubber. Memory The ability of a rubber band to return to its original shape after being stretched, to within a few percent.
Non-Latex For uses where allergic reactions to latex proteins are possible, a synthetic polyisoprene formula is used in place of natural rubber.
Tensile Set The extent to which a rubber band does not return to its original shape after being stretched and held in that position for a given period of time.
Tensile Strength Shows how much force the rubber material can withstand before breaking. Ordering Terms Custom Bands Any band that varies from our stock bands. Elongation The extension or stretch of a rubber band. Size Considerations Cut Width When the band is laying flat measured across the band at a right angle to the flat length. The History of Elastic and Rubber Bands. The ancient Mayan People used latex to make rubber balls, hollow human figures, and as bindings used to secure axe heads to there handles and other functions.
Latex is the sap of various plants, most notably the rubber tree. When it is exposed to the air it hardens into a springy mass. The Mayans learned to mix the rubber sap with the juice from morning glory vines so that it became more durable and elastic, and didn't get quite as brittle. Both the rubber tree and the morning glory were important plants to the Mayan people - the latter being a hallucinogen as well as a healing herb.
They two plants tended to grow close together. Combining their juices, a black substance about the texture of a gum-type pencil eraser was formed. Native peoples in the region still make rubber in the same way. In several rolled sheets of rubber were sent to France where it fascinated those who saw it. In , an Englishman named Samuel Peal discovered a means of waterproofing cloth by mixing rubber with turpentine. English inventor and scientist, Joseph Priestly, got his hands on some rubber and realized it could be used to erase pencil marks on sheets of paper.
In , Charles Macintosh patented a method for making waterproof garments by using rubber dissolved in coal-tar naphtha for cementing two pieces of cloth together. Natural rubber comes from latex, a milky fluid composed primarily of water with a smaller amount of rubber and trace amounts of resin, protein, sugar, and mineral matter. Most non-synthetic industrial latex derives from the rubber tree Hevea brasiliensis. Rubber trees only survive in hot, humid climates near the equator and so the majority of latex is produced in the Southeast Asian countries of Malaysia, Thailand and Indonesia.
To "tap" the substance from a Rubber Tree, rubber harvesters cut a "V"-shaped wedge in the bark to reach the latex without cutting into the sap vessels. Impurities such as tree sap and debris are filtered out and combined with acetic or formic acid to form slabs.
The slabs are squeezed between rollers to remove water and pressed into bales or blocks usually 2 or 3 square feet.
Slabs are machine cut into small pieces. Using a banbury mixer the rubber is mixed with other ingredients: sulfur to vulcanize, pigments to color, and chemicals to adjust the required elasticity of the rubber bands. Milling entails heating the rubber and squeezing it flat in a milling machine. This is because materials added to dilute rubber content are usually low value silicone or paraffin fillers.
These type rubber bands are cheaper to make and sell at lower cost. Also, lower content rubber bands do not stretch as far and have a shorter shelf life. Generally t he rubber content percentage in our rubber bands is as follows:. Premium Grade has a higher rubber content than Standard.
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