Fishing nets

PVA fibers have found wide spread industrial use in cement as replacement for asbestos in cement products, reinforcement of mbber material such as conveyor belts and hydraulic mbber hoses used in cars, ropes, fishing nets, etc. Only a small amount of fibers is used in the production of textiles. 

Although the above applications consume over 90% of the polyethylene produced there are a number of other important end-uses. Filament for ropes, fishing nets and fabrics are an important outlet for high-density polyethylene powdered polymers are used for dip coating, flame spraying, rotational moulding and other outlets, whilst fabricated sheet is important in chemical plant. 

Recently, pollution by organotin compounds was extensive in the environment and its effects on human health are feared. Organotin compounds such as tributyltin and triphenyltin, which are widely used in antifouling paints for ships and fishing nets, are very toxic to aquatic organisms38. These compounds may be accumulated in various organisms through the food chain. 

Three females found dead in fishing nets Baltic Sea, 1989-90... 

Leatherback turtle, Dermochelys coriacea adult male found drowned in fishing net west coast of Britain adipose tissue vs. liver ... 

In the past, natural resins served as universal adhesives for fixing stone points and blades to hafts of wood or antler, to glue feathers to arrow shafts and for repairing materials such as broken pottery and bone combs. As sealants, resins were used to coat the surfaces of pottery and basketry in order to provide an impermeable lining. Resins were also used to waterproof hunting equipment and fishing nets, as well as canoes and ships from Noah s Ark (Genesis 6 14) to... 

Proposed aquaculture applications of degradable polymers include seaweed culture nets, fishing nets and lines, and temporary structures used for restoration of wet lands, beaches or other marsh areas [11-14], Weathering and hydrolysis are the most common degradation mechanisms encountered in aquatic applications. Continually submerged articles pose special challenges since temperatures are low and photodegradation and oxidation effects are limited. 

Piastics and other debris Runoff from urban areas and iandfiii dumping and ioss from cargo, miiitary, and cruise ships ioss of fishing nets Entangies marine iife or is ingested degrades beaches, wetiands, and nearshore habitats. 

Polypropylenes are available as molding powder, extruded sheet, cast film, textile staple, and continuous-filament yarn. They find use in packaging film molded parts for automobiles, appliances, and housewares wire and cable coating food container closures bottles, printing plates carpet and upholstery fibers storage battery cases crates for soft-drink bottles laboratory ware trays fish nets surgical casts and a variety of other applications. 

The poly(vinylidene chloride-cu-vinylchloride) may be injection molded and extruded. Extruded pipe and molded fittings which were produced in large quantity in the 1940s have been replaced to some extent by less expensive thermoplastics. A llal extruded filament is used for scouring pads and continuous extruded circular filament is used for the production of insect screening, filter clothes, fishing nets and automotive seat covers. 

Fibers are used in a wide variety of applications and are composed of diverse materials. Natural animal and plant fibers, including wool, silk, cotton, hemp, ramie, flax, jute, and sisal, have long been used for clothing, baskets, fishing nets, and rope. Ropemaking has been an essential skill for thousands of years, a key element in the advancement of civilizations via the oceans. The natural mineral fiber asbestos is in the silicate family. We have encountered glass fibers previously in the text (see Chapter 7). 

JJrylon fibers are used in premium fishing nets because the polymer is relatively stable to UV light and aqueous acid and base. The structure of Urylon is... 

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