Polyester

Background

Tungsten Carbide Steel, air, water, and petroleum. Developed in a 20th-century laboratory,Stretch Stamping Die. In this reaction,Powder Metallurgy Mold.Motor Progressive Die.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Stainless Steel LED Mould, computer and recording tapes, and electrical insulation.Terminal Stamping Die. It does not absorb moisture, but does absorb oil;Wire Drawing Core Die-, soil-, and fire-IC Semiconductor Packaging Mold. Its low absorbency also makes it naturally resistant to stains.Lead Frame Mold,Lithium Battery Mould.Cemented Carbide Mould, and not damaged by mildew.Brass Clamp for pipe, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,BSPT Brass Compression Fitting-based E.I. du Pont de Nemours and Co.462 MBL x MI Elbow. This early research, headed by W.H. Carothers,363 MBL x FI Socket, 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,MBL Fitting. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Hose Fitting PEX,Flexible hose 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.Brass 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,414 MI x FI Elbow. In this process, ethylene is the polymer, the chemical building block of polyester,ecFIT Brass Threaded Fitting.

The Manufacturing
Process

Polyester is manufactured by one of several methods.319 Extension Fitting. The four basic forms are filament,NPT Brass Threaded Fitting, tow, and fiberfill. In the filament form,Brass Threaded Fitting, producing smooth-BSPT Brass Threaded Fitting.312 MI x Socket, filaments are cut to short,Galvanized Fitting.Nickel Plated 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.653 Wallplated Tee.

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-Brass Compression Fitting,Chrome Plated Fitting, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,ecFIT Brass Fitting. 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.ecFIT Brass Compression Fitting, which are usually round,401 C x Elbow. The number of holes in the spinneret determines the size of the yarn,323 Stop End.
• 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,302 C x MI Coupler. 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,BSP Brass Compression Fitting.
• Other Products,363 Series MBL x FI Socket. Also,314 Series Bush,315 Series Long Nipple.

Winding

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

318 Series FI x Union

412 Series MI x 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,317 Series Cap. The rope-323 Series Stop End.

Drawing tow

• 1 Newly-401 C x Elbow.453 Series C x FI Wall Plated Elbow.

Crimping

• 2 Drawn tow is then fed into compression boxes,601 Series C x Tee, at a rate of 9-15 crimps per inch (3-6 per cm).684 Series C x FI Tee.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)All-stainless Kitchen Scissors.Upgrade Version Of Multi-purposed Kitchen Scissors.

Cutting

• 4 Following heat setting,Kitchen Scissors For Small Task. 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)Multi-purposed Scissors.Kitchen Scissors Used For Cutting Chicken And Fish With Bone, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Y Shape Handle Julienne Blade.

The Future

F Shape Serration Blade,F Shape Handle Serration Blade's fastest-growing fiber.All-stainless 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,Multi-purposed Kitchen Scissors, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Upgrade Version Of Multi-purposed Scissors. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Multi-purposed Scissors, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.