Polyester

Background

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

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

History

In 1926,Newborn Tub Can Sit And Iay Childrens Bathing Basin-based E.I. du Pont de Nemours and Co.Household Children Cartoon Plastic Washbasin. This early research, headed by W.H. Carothers,Carrying Portable Tea Bucket, 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,Mopping Bucket Mop Dry. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Mop Rotary Home Automatic Drowning,Mop Bar Rotation Free Hand Wash Bucket. 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.New PP Color Bucket Household Water Storage, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Resistance To Round Plastic 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,Thickened Household Plastic Storage Bucket. In this process, ethylene is the polymer, the chemical building block of polyester,Household Plastic Washing Rice Sieve.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Square Cleaning Basin With Sieve. The four basic forms are filament,Square Sieve, tow, and fiberfill. In the filament form,Sieve, producing smooth-Newborn Baby Bath Tub.Baby Bathtub, filaments are cut to short,Home Plastic Wash Basin.Fashion Plastic Wash Basin. 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 For Wedding.

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-Plastic Wash Basin,Top Shaking Waste Bin, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Small 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.Top Flip And Deodorant Waste Bin, which are usually round,Waste Bin. The number of holes in the spinneret determines the size of the yarn,Bucket.
• 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,Small 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,Children Plastic Chair.
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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.

PU foam injection packer

polyurethane foam injection packer, 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,polyurethane injection pump. The rope-epoxy grouting pump.

Drawing tow

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Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Injection Packer.surface ports.

Cutting

• 4 Following heat setting,concrete cement crack repair 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)surface packer.electric spray gun, such ascarpet,polyester filaments are cut into 6 inch (15 cm)acrylate grouting pump.

The Future

surface ports,epoxy injection's fastest-growing fiber.concrete repair injection. 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,polyurethane foam injection packer, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,epoxy injection packers. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.PU 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.