Hylam Material Properties Pdf 32
Gifford Brickley
Because of its electrical nonconductivity and heat-resistant properties, it became a great commercial success. It was used in electrical insulators, radio and telephone casings, and such diverse products as kitchenware, jewelry, pipe stems, children's toys, and firearms. The "retro" appeal of old Bakelite products has made them collectible.[3]
Leo Baekeland was already wealthy due to his invention of Velox photographic paper when he began to investigate the reactions of phenol and formaldehyde in his home laboratory. Chemists had begun to recognize that many natural resins and fibers were polymers. Baekeland's initial intent was to find a replacement for shellac, a material in limited supply because it was made naturally from the secretion of lac insects (specifically Kerria lacca). He produced a soluble phenol-formaldehyde shellac called "Novolak", but it was not a market success,[4] even though it is still used to this day (e.g., as a photoresist).
Baekeland started semi-commercial production of his new material in his home laboratory, marketing it as a material for electrical insulators. In the summer of 1909, he licensed the continental European rights to Rütger AG. The subsidiary formed at that time, Bakelite AG, was the first to produce Bakelite on an industrial scale.
By 1910, Baekeland was producing enough material in the US to justify expansion. He formed the General Bakelite Company of Perth Amboy, NJ as a U.S. company to manufacture and market his new industrial material, and made overseas connections to produce it in other countries.[4]
In addition to the original Bakelite material, these companies eventually made a wide range of other products, many of which were marketed under the brand name "Bakelite plastics". These included other types of cast phenolic resins similar to Catalin, and urea-formaldehyde resins, which could be made in brighter colors than polyoxybenzylmethyleneglycolanhydride.[3][8]
During World War II, Bakelite was used in a variety of wartime equipment including pilots' goggles and field telephones.[60] It was also used for patriotic wartime jewelry.[61][62] In 1943, the thermosetting phenolic resin was even considered for the manufacture of coins, due to a shortage of traditional material. Bakelite and other non-metal materials were tested for usage for the one cent coin in the US before the Mint settled on zinc-coated steel.[63][64]
By the late 1940s, newer materials were superseding Bakelite in many areas.[42] Phenolics are less frequently used in general consumer products today due to their cost and complexity of production and their brittle nature. They still appear in some applications where their specific properties are required, such as small precision-shaped components, molded disc brake cylinders, saucepan handles, electrical plugs, switches and parts for electrical irons, printed circuit boards, as well as in the area of inexpensive board and tabletop games produced in China, Hong Kong, and India. Items such as billiard balls, dominoes and pieces for board games such as chess, checkers, and backgammon are constructed of Bakelite for its look, durability, fine polish, weight, and sound.[citation needed] Common dice are sometimes made of Bakelite for weight and sound, but the majority are made of a thermoplastic polymer such as acrylonitrile butadiene styrene (ABS).Bakelite continues to be used for wire insulation, brake pads and related automotive components, and industrial electrical-related applications. Bakelite stock is still manufactured and produced in sheet, rod, and tube form for industrial applications in the electronics, power generation, and aerospace industries, and under a variety of commercial brand names.[42]
Bakelite items, particularly jewelry and radios, have become popular collectibles.[42] The term Bakelite is sometimes used in the resale market to indicate various types of early plastics, including Catalin and Faturan, which may be brightly colored, as well as items made of Bakelite material.[41][71]
Thermosetting plastic laminates are created using heat and pressure to combine a mixture of synthetic thermosetting resin with layers of paper, glass fibre, cloth, linen or canvas. The resulting phenolic plastic product is a dense homogeneous material that is easy to saw, drill, tap, and machine with ordinary tools.
Phenolic laminates have excellent electrical properties, high physical strength and resiliency in a wide range of applications. They are available in both Mechanical (fabric based) and Electrical grades (paper based) and are most commonly used as electrical components such as: insulating washers, spacers, punch parts, terminal boards, etc.
Glass epoxy laminates are used in electrical applications where high arc resistance is needed. They offer very high mechanical strength and low moisture absorption, combined with excellent electrical properties, under both dry and humid conditions. They are rigid materials with good dimensional stability and good resistance to a wide range of working environments.
Properties: Excellent insulation properties, moisture resistant, good mechanical & impact strength, high dielectric strength, light weight, dimensionally stable, ease of machining, excellent tensile, compressive and flexural strengths.
Bakelite sheets are manufactured by using multiple layers of kraft paper properly treated with phenolic resin. These laminates are used as insulation material and they are classified on the basis of their electric properties & water absorption.
Bakelite laminate paper-based sheet is made of insulating impregnated paper soaked in hot pressed phenolic resin. It has High mechanical and electrical properties. The product is used to make insulating structural components in motors and electrical equipment with high mechanical performance, and can be used in transformer oil.
Phenolic Laminated Sheet offered comprises cotton cloth laminated bakelite sheet coming developed using modified phenolic resin as binder and cotton fabric as reinforcement. These provide for superior heat resistance and non-creep usage even under high temperature conditions. Some of its features include superior physical properties, good dielectric properties, used in insulation structural parts, electric equipment among others.
Phenolic Cotton Cloth Laminated Sheets is a laminated material made by hot pressing of cotton cloths impregnated with a thermosetting phenolic resin binder.It is well processed by all kinds of machining.
Various features include fire retardant, high impact strength, low water absorption properties and flame, moisture and arc resistance. Additional sizes are also offered. Suitable for barriers, breaker arms, switch panel and terminal boards, relay, switch bases, bearings, gears, gaskets, washers, spacers and wear strips. Serves the food, beverage, pharmaceutical, medical, aerospace, defense and chemical processing industries.
Our experience of 12 years in the respective domain helps us top procure an optimum quality range of Hylam Sheet. These includes Industrial laminates paper and fabric base sheets (also famous as Bakelite sheet/ Hylam sheet), which offered in various grades and sizes.
Manufactured using a quality raw material, our range is defect free and requires low maintenance.
We offer a high quality range of Bakelite Rods to our customers. These products are highly famed for their paper base electrical insulating properties. Customers highly appreciate these rods for their unmatched quality and high strength, owing to which these products are used to serve various applications in different industries. We are specialized in providing these products in standard shapes, sizes and grades as per the specific requirements of our clients.
In our large product line, we are offering as large assortment of Graphite Products. These products are fabricated using quality graphite procured from trustworthy vendors of the market. These products are find applications in various industrial applications. In addition to this, we check this array of products in our state-of-the-art quality checking unit on the basis of some well-defined parameters. Before the final delivery of these product we pack these with quality material for a safe transit.
aa06259810