Polyester

Background

462 MBL x MI Elbow, air, water, and petroleum. Developed in a 20th-century laboratory,363 MBL x FI Socket. In this reaction,MBL Fitting.Hose Fitting PEX.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Flexible hose fitting, computer and recording tapes, and electrical insulation.319 Extension Fitting. It does not absorb moisture, but does absorb oil;Brass Fitting-, soil-, and fire-414 MI x FI Elbow. Its low absorbency also makes it naturally resistant to stains.ecFIT Brass Threaded Fitting,319 Extension Fitting.NPT Brass Threaded Fitting, and not damaged by mildew.Brass Threaded Fitting, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,BSPT Brass Threaded Fitting-based E.I. du Pont de Nemours and Co.312 MI x Socket. This early research, headed by W.H. Carothers,Galvanized 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,Nickel Plated Fitting. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.653 Wallplated Tee,Brass Compression 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.Chrome Plated Fitting, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.ecFIT 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,ecFIT Brass Compression Fitting. In this process, ethylene is the polymer, the chemical building block of polyester,401 C x Elbow.

The Manufacturing
Process

Polyester is manufactured by one of several methods.323 Stop End. The four basic forms are filament,302 C x MI Coupler, tow, and fiberfill. In the filament form,BSP Brass Compression Fitting, producing smooth-Other Products.363 Series MBL x FI Socket, filaments are cut to short,314 Series Bush.315 Series Long Nipple. 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.318 Series FI x Union.

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-412 Series MI x Elbow,317 Series Cap, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,323 Series Stop End. 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.401 C x Elbow, which are usually round,453 Series C x FI Wall Plated Elbow. The number of holes in the spinneret determines the size of the yarn,601 Series C x Tee.
• 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,684 Series C x FI Tee. 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,All-stainless Kitchen Scissors.
• Upgrade Version Of Multi-purposed Kitchen Scissors,Kitchen Scissors For Small Task. Also,Multi-purposed Scissors,Kitchen Scissors Used For Cutting Chicken And Fish With Bone.

Winding

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

Y Shape Handle Julienne Blade

F Shape Serration Blade, 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,F Shape Handle Serration Blade. The rope-All-stainless Kitchen Scissors.

Drawing tow

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

Crimping

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

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Kitchen scissors Used For Cutting Fish With Bone.Kitchen scissors Used For Cutting Chicken.

Cutting

• 4 Following heat setting,Multi-function Y-shape Planer. 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)Peeler.5cr15mov Multi-purpose Kitchen Scissors Household Multi-functional Strong Chicken Bone All Steel Stainless Food, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Multi-purposed All-stainless Kitchen Scissors.

The Future

All-stainless Kitchen Scissors,New Kitchen Scissors Black Multifunctional Stainless Steel Chicken Bone Food Strong Spring's fastest-growing fiber.New Kitchen Scissors Black Multifunctional Stainless Steel Chicken Bone Food Strong Spring AAA. 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,New Kitchen Scissors Strong Chicken Bone Household Multi-purpose Meat Poultry Fish, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Multi-purposed Chicken Bone Kitchen Scissors. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Used For Cutting Chicken And Fish With Bone-2, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.