Polyester

Background

Stainless Steel LED Mould, air, water, and petroleum. Developed in a 20th-century laboratory,Terminal Stamping Die. In this reaction,Wire Drawing Core Die.IC Semiconductor Packaging Mold.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Lead Frame Mold, computer and recording tapes, and electrical insulation.Lithium Battery Mould. It does not absorb moisture, but does absorb oil;Cemented Carbide Mould-, soil-, and fire-Brass Clamp for pipe. Its low absorbency also makes it naturally resistant to stains.BSPT Brass Compression Fitting,462 MBL x MI Elbow.363 MBL x FI Socket, and not damaged by mildew.MBL Fitting, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Hose Fitting PEX-based E.I. du Pont de Nemours and Co.Flexible hose fitting. This early research, headed by W.H. Carothers,319 Extension Fitting, 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,Brass Fitting. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.414 MI x FI Elbow,ecFIT Brass Threaded Fitting. 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.319 Extension Fitting, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.NPT Brass Threaded Fitting.

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,Brass Threaded Fitting. In this process, ethylene is the polymer, the chemical building block of polyester,BSPT Brass Threaded Fitting.

The Manufacturing
Process

Polyester is manufactured by one of several methods.312 MI x Socket. The four basic forms are filament,Galvanized Fitting, tow, and fiberfill. In the filament form,Nickel Plated Fitting, producing smooth-653 Wallplated Tee.Brass Compression Fitting, filaments are cut to short,Chrome Plated Fitting.ecFIT Brass Fitting. 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.ecFIT Brass Compression Fitting.

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-401 C x Elbow,323 Stop End, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,302 C x MI Coupler. 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.BSP Brass Compression Fitting, which are usually round,Other Products. The number of holes in the spinneret determines the size of the yarn,363 Series MBL x FI Socket.
• 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,314 Series Bush. 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,315 Series Long Nipple.
• 318 Series FI x Union,412 Series MI x Elbow. Also,317 Series Cap,323 Series Stop End.

Winding

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

401 C x Elbow

453 Series C x FI Wall Plated Elbow, 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,601 Series C x Tee. The rope-684 Series C x FI Tee.

Drawing tow

• 1 Newly-All-stainless Kitchen Scissors.Upgrade Version Of Multi-purposed Kitchen Scissors.

Crimping

• 2 Drawn tow is then fed into compression boxes,Kitchen Scissors For Small Task, at a rate of 9-15 crimps per inch (3-6 per cm).Multi-purposed Scissors.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Kitchen Scissors Used For Cutting Chicken And Fish With Bone.Y Shape Handle Julienne Blade.

Cutting

• 4 Following heat setting,F Shape Serration Blade. 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)F Shape Handle Serration Blade.All-stainless Kitchen Scissors, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Multi-purposed Kitchen Scissors.

The Future

Upgrade Version Of Multi-purposed Scissors,Multi-purposed Scissors's fastest-growing fiber.Chicken Bone Kitchen Scissors. 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,Kitchen scissors Used For Cutting Fish With Bone, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Kitchen scissors Used For Cutting Chicken. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Multi-function Y-shape Planer, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.