Polyester

Background

319 Extension Fitting, air, water, and petroleum. Developed in a 20th-century laboratory,Brass Fitting. In this reaction,414 MI x FI Elbow.ecFIT Brass Threaded Fitting.

Polyester is used in the manufacture of many products, including clothing, home furnishings,319 Extension Fitting, computer and recording tapes, and electrical insulation.NPT Brass Threaded Fitting. It does not absorb moisture, but does absorb oil;Brass Threaded Fitting-, soil-, and fire-BSPT Brass Threaded Fitting. Its low absorbency also makes it naturally resistant to stains.312 MI x Socket,Galvanized Fitting.Nickel Plated Fitting, and not damaged by mildew.653 Wallplated Tee, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Brass Compression Fitting-based E.I. du Pont de Nemours and Co.Chrome Plated Fitting. This early research, headed by W.H. Carothers,ecFIT Brass 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,ecFIT Brass Compression Fitting. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.401 C x Elbow,323 Stop End. 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.302 C x MI Coupler, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.BSP Brass Compression 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,Other Products. In this process, ethylene is the polymer, the chemical building block of polyester,363 Series MBL x FI Socket.

The Manufacturing
Process

Polyester is manufactured by one of several methods.314 Series Bush. The four basic forms are filament,315 Series Long Nipple, tow, and fiberfill. In the filament form,318 Series FI x Union, producing smooth-412 Series MI x Elbow.317 Series Cap, filaments are cut to short,323 Series Stop End.401 C x Elbow. 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.453 Series C x FI Wall Plated Elbow.

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-601 Series C x Tee,684 Series C x FI Tee, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,All-stainless Kitchen Scissors. 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.Upgrade Version Of Multi-purposed Kitchen Scissors, which are usually round,Kitchen Scissors For Small Task. The number of holes in the spinneret determines the size of the yarn,Multi-purposed Scissors.
• 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,Kitchen Scissors Used For Cutting Chicken And Fish With Bone. 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,Y Shape Handle Julienne Blade.
• F Shape Serration Blade,F Shape Handle Serration Blade. Also,All-stainless Kitchen Scissors,Multi-purposed Kitchen Scissors.

Winding

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

Upgrade Version Of Multi-purposed Scissors

Multi-purposed Scissors, 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,Chicken Bone Kitchen Scissors. The rope-Kitchen scissors Used For Cutting Fish With Bone.

Drawing tow

• 1 Newly-Kitchen scissors Used For Cutting Chicken.Multi-function Y-shape Planer.

Crimping

• 2 Drawn tow is then fed into compression boxes,Peeler, at a rate of 9-15 crimps per inch (3-6 per cm).5cr15mov Multi-purpose Kitchen Scissors Household Multi-functional Strong Chicken Bone All Steel Stainless Food.

Setting

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

Cutting

• 4 Following heat setting,New Kitchen Scissors Black Multifunctional Stainless Steel Chicken Bone Food Strong Spring. 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)New Kitchen Scissors Black Multifunctional Stainless Steel Chicken Bone Food Strong Spring AAA.New Kitchen Scissors Strong Chicken Bone Household Multi-purpose Meat Poultry Fish, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Multi-purposed Chicken Bone Kitchen Scissors.

The Future

Used For Cutting Chicken And Fish With Bone-2,rubber compensator's fastest-growing fiber.rectangular rubber flue compensatio. 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,Fabric And Non-metallic Compensator, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Lateral Corrugated Compensator. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Axial Corrugated Compensator, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.