|
|
Cure of thermosetting resin is initiated by heat in the die and catalyst in the resin mix. The rate of reaction is controlled by heating and cooling zones in the die. The resulting high strength profile is cut to length, ready to use as it leaves the pultrusion machine. The controversy over metal versus fiberglass antennas continues, despite the over whelming evidence in favor of fiberglass. This article summarizes the contents of a number of other separate articles which have appeared in the industry media from time to time and is intended, from an objective point of view, to add credence to our claim that fiberglass is better. The ipso facto use of fiberglass, of course, does not guarantee a good antenna and there are a few antenna manufacturers who have "missed the boat" on techniques, which means there are poor quality fiberglass antennas, just as there are poor quality metal antennas, out there. Ultraviolet radiation from the sun does not affect aluminum, but in time, will affect untreated fiberglass. For this reason reflectors contain a stabilizing additive in the resin which effectively eliminates this problem. Throughout history, manufacturers have found a way to create confusion within their markets. Some do it intentionally to overcome their inability to sell their products or services based upon the merits of the product or service. Other manufactures simply ignore the fact that many users of their products have absolutely no background regarding the product and need the most fundamental information from which to build their knowledge base. The antenna industry, by use of vague terminology, has created some confusion too. Two of these areas, "factory pre-tuned" and "tunable antenna", will be explored. industrial activities include raw material extraction to manufacture glass, sodium bicarbonate, as well as sodium silicate and bicarbonate, just to mention some specialized chemicals. Tencom is a manufacturer of fiberglass-reinforced composite rods. Through the use of the manufacturing process known as "Pultrusion", we are able to produce composite rod products in a variety of custom lengths and colors. Ourcompany is dedicated to providing its customers consistently high quality product at the very best prices and with no compromises in customer service. Our company can service almost any need in pultruded composite rod. If you use or are considering using composite rod, contact us for a competitive quote. Our company also offers several secondary operations, including the rods punching and drilling of fiberglass. Continuous fiber reinforcement in roving or mat/ roving forms are drawn through a resin bath to coat each fiber with a specially formulated resin mixture. The coated fibers are then drawn through a heated die.
|