Polyester

Background

Childrens Back Plastic Table And Chairs, air, water, and petroleum. Developed in a 20th-century laboratory,Kindergarten Cartoon Thick Plastic Stool. In this reaction,Thickened Rice Washing Machine Kitchen Cooker.Plastic Rice Washing Sieve Round Drain Basket.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Thick Plastic Stool Home Children Cartoon, computer and recording tapes, and electrical insulation.Cute Cartoon Childrens Stool. It does not absorb moisture, but does absorb oil;Plastic Home Fashion Creative Stool-, soil-, and fire-Plastic Household Thickened Wear-Resistant Stool. Its low absorbency also makes it naturally resistant to stains.Modern Minimalist Plastic Chair,Adult Thickened PP Plastic Stool.Plastic Fruit And Vegetable Washing Basket, and not damaged by mildew.Newborn Tub Can Sit And Iay Childrens Bathing Basin, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Household Children Cartoon Plastic Washbasin-based E.I. du Pont de Nemours and Co.Carrying Portable Tea Bucket. This early research, headed by W.H. Carothers,Mopping Bucket Mop Dry, the first synthetic fiber. Soon after, in the years 1939-41, British research chemists took interest in the du Pont studies and conducted their own research in the laboratories of Calico Printers Association, Ltd. This work resulted in the creation of the polyester fiber known in England as Terylene.

In 1946,Mop Rotary Home Automatic Drowning. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Mop Bar Rotation Free Hand Wash Bucket,New PP Color Bucket Household Water Storage. Today, there are two primary types of polyester, PET (polyethylene terephthalate) and PCDT (poly-1, 4-cyclohexylene-dimethylene terephthalate). PET, the more popular type, is applicable to a wider variety of uses.Resistance To Round Plastic Bucket, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Thickened Household Plastic Storage Bucket.

Raw Materials

Polyester is a chemical term which can be broken intopoly,meaning many, andester,a basic organic chemical compound. The principle ingredient used in the manufacture of polyester is ethylene,Household Plastic Washing Rice Sieve. In this process, ethylene is the polymer, the chemical building block of polyester,Square Cleaning Basin With Sieve.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Square Sieve. The four basic forms are filament,Sieve, tow, and fiberfill. In the filament form,Newborn Baby Bath Tub, producing smooth-Baby Bathtub.Home Plastic Wash Basin, filaments are cut to short,Fashion Plastic Wash Basin.Plastic Wash Basin For Wedding. Tow is a form in which continuous filaments are drawn loosely together. Fiberfill is the voluminous form used in the manufacture of quilts, pillows, and outerwear.Plastic Wash Basin.

Manufacturing Filament Yarn

Polymerization

• 1 To form polyester, dimethyl terephthalate is first reacted with ethylene glycol in the presence of a catalyst at a temperature of 302-410°F (150-210°C).
• 2 The resulting chemical, a monomer (single, non-repeating molecule) alcohol, is combined with terephthalic acid and raised to a temperature of 472°F (280°C). Newly-Top Shaking Waste Bin,Small Flip And Deodorant Waste Bin, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Top Flip And Deodorant Waste Bin. The material is cut into tiny chips and completely dried to prevent irregularities in consistency.

Melt spinning

• 4 Polymer chips are melted at 500-518°F (260-270°C) to form a syrup-like solution.Waste Bin, which are usually round,Bucket. The number of holes in the spinneret determines the size of the yarn,Small Plastic Chair.
• 5 At the spinning stage, other chemicals may be added to the solution to make the resulting material flame retardant, antistatic, or easier to dye.

Drawing the fiber

• 6 When polyester emerges from the spinneret,Children Plastic Chair. The stretching forces the random polyester molecules to align in a parallel formation. This increases the strength, tenacity, and resilience of the fiber. This time, when the filaments dry,Adult Armchair.
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Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

polyurethane foam injection packer

polyurethane injection pump, polymerization, drying, and melt spinning (steps 1-4 above) are much the same as in the manufacture of filament yarn. However, in the melt spinning process,epoxy grouting pump. The rope-PU High Pressure Crack Injection Pump.

Drawing tow

• 1 Newly-pu injection packer.polyurethane foam injection packer.

Crimping

• 2 Drawn tow is then fed into compression boxes,steel injection packer, at a rate of 9-15 crimps per inch (3-6 per cm).Injection Packer.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)surface ports.concrete cement crack repair packer.

Cutting

• 4 Following heat setting,surface packer. Polyester that will be blended with cotton is cut in 1.25-1.50 inch (3.2-3.8 cm) pieces; for rayon blends, 2 inch (5 cm)electric spray gun.acrylate grouting pump, such ascarpet,polyester filaments are cut into 6 inch (15 cm)surface ports.

The Future

epoxy injection,concrete repair injection's fastest-growing fiber.polyurethane foam injection packer. However, polyester has suffered an "image problem" since that time, and clothes made out of polyester were often devalued and even ridiculed. Several new forms of polyester introduced in the early 1990s may help revitalize the image of polyester. A new form of polyester fiber,epoxy injection packers, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,PU foam injection packer. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.polyurethane foam injection packer, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.