Footwear components

Footwear components thermoformed shoe inserts, football boot soles, protective pads for shoes and boots. .. 

Copolymers have properties quite different from homopolymers. For example, butadiene - styrene copolymer is quite tough and is a good substitute for natural rubber. It is used for the manufacture of autotyres, floortiles, footwear components, cable insulation, etc. 

Surlyn . PuPont DuPont UK] lonomar resins extrudable resin for flexible pkg., in coextnisions, laminations, golf ball and bowling pin covers, automotive exteriw body trim, footwear components, wire and cable insulation, ski boots, metal coating, glazing. 

Integral skin PUR foams are made by injecting the reactants into a closed (vented) or open mold. Reaction under fliese conditions produces a foam with a high-density outside skin layer and a soft foam interior. Common products such as steering wheels, footwear components, and computer housings generally employ integral skin PUR foams. 

Footwear components Footwear consists of a number of different components (as shown in Figure 6.10) and described in the next sections. Some terms refer to parts that all shoes have, such as the sole while other terms may only apply to certain types or style of shoes. 

The main applications of needle-pimched fabrics are automotive, geotextiles, footwear components, insulation, and roofing substrates. 

Penetration resistance test The penetration resistant inserts are footwear components placed in the sole complex in order to provide protection against mechanical penetration. The penetration resistance tests were performed according to the standard EN ISO 12568— Eoot and leg protectors— Requirements and test methods for toecaps and penetration resistant inserts . When tested accorded to the mentioned standard, using a force of at least 1 100 N, the tip of the test nail shall not penetrate through the test piece. A pass result requires that the tip of the test nail does not protrude from the rear side of the test piece to be checked by visual, cinematographic or electrical detection. This test was performed for the new materials alone and for the materials combinations. 

Low temperature formabiHty and resiHence are key properties in the area of shoe components, ie, box toes and counters. These ionomer components are not seen by the purchaser of the finished article, but provide comfort and durabiHty in high quaHty footwear. 

Bayer, USI, and DuPont are U.S. suppHers. There is an estimated 2300—4000 t/yr of EVA used in the United States. Uses include automotive electrical system components, eg, ignition cable, footwear, weatherstripping, and misceUaneous O-rings and seals for industrial appHcations. 

Silica. The main uses of siUca are in the treads of off-the-road tines for improved chunking and tear resistance and as a component of the bonding system for brass and 2inc-plated steel cord. These are commonly used in radial passenger and tmck tire belt skim stock. In addition the body pHes of steel radial tmck tires, hoses and belts, and footwear use significant volumes of siUca as a reinforcing filler. 

Adhesives and Sealants. Most industrial adhesives contain surface active components and additives, and air entrainment during their mechanical appHcation can significantly reduce joint strength. Defoamers are usually formulated into adhesives to protect users against such difficulties. Additional benefits, such as improved uniformity of products, increased throughput and reduced labor costs can also result from the use of defoamers during adhesive appHcation. The footwear and nonwoven fabric industries are extensive users of defoamers in this way. 

Autoclaves for rubber product vulcanisation are available in a wide range of sizes to suit the product type. The main use for autoclaves is in the production of extrusions, sheeting and components which are of unsuitable size or construction for conventional mould vulcanisation. Examples of this type of product can range from roller coverings to hand-built products such as footwear. 

Clicker presses are required for bulk cutting of components used in the manufacture of a number of hand-built products such as footwear. 

Ground mbber has replaced reclaim in many tire applications including treads, carcasses, innerliners, subtreads, and bead components. It is also used in mechanical goods, footwear, solid tires, mats, and retreads. Cryogenically and wet-ground mbbers which are of smaller particle size can be used at moderately bigb levels and still allow compounds to be processible. 

Otto Bayer produced PUs in the 1940 s by reacting diisocyanates, such as tolyl diisocyanate, with dihydric alcohols, such as ethylene glycol. In another experiment he added a diisocyanate to cure synthetic rubber (SR) containing hydroxyl groups. The rubber was cured (vulcanized), but it stuck to the mold. Variations of products from these two experiments are now used as two-component adhesives for bonding footwear and automotive plastic parts. 

Used as a medium-fast vulcanization accelerator for butyl, isoprene, and diene (natural and synthetic) rubbers. Also used as a retarder in neoprene. Commonly found in industrial rubber products such as footwear, hose, roofing and automotive components. 

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