Polyester

Background

Tungsten Steel Ball, air, water, and petroleum. Developed in a 20th-century laboratory,ST7 Hard Alloy Core For Cold Heading Die. In this reaction,K44 Tungsten Steel Fine Grinding Rod.Tungsten Steel Single Straight Hole Threaded Round Rod With.

Polyester is used in the manufacture of many products, including clothing, home furnishings,TSF44 Tungsten Steel Carving Knife, computer and recording tapes, and electrical insulation.JG Coordinate Grinding. It does not absorb moisture, but does absorb oil;Tungsten Carbide Steel-, soil-, and fire-Stretch Stamping Die. Its low absorbency also makes it naturally resistant to stains.Powder Metallurgy Mold,Motor Progressive Die.Stainless Steel LED Mould, and not damaged by mildew.Terminal Stamping Die, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Wire Drawing Core Die-based E.I. du Pont de Nemours and Co.IC Semiconductor Packaging Mold. This early research, headed by W.H. Carothers,Lead Frame Mold, 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,Lithium Battery Mould. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Cemented Carbide Mould,Brass Clamp for pipe. 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.BSPT Brass Compression Fitting, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.462 MBL x MI Elbow.

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,363 MBL x FI Socket. In this process, ethylene is the polymer, the chemical building block of polyester,MBL Fitting.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Hose Fitting PEX. The four basic forms are filament,Flexible hose fitting, tow, and fiberfill. In the filament form,319 Extension Fitting, producing smooth-Brass Fitting.414 MI x FI Elbow, filaments are cut to short,ecFIT Brass Threaded Fitting.319 Extension 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.NPT Brass Threaded 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-Brass Threaded Fitting,BSPT Brass Threaded Fitting, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,312 MI x Socket. 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.Galvanized Fitting, which are usually round,Nickel Plated Fitting. The number of holes in the spinneret determines the size of the yarn,653 Wallplated 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,Brass Compression Fitting. 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,Chrome Plated Fitting.
• ecFIT Brass Fitting,ecFIT Brass Compression Fitting. Also,401 C x Elbow,323 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.

302 C x MI Coupler

BSP Brass Compression Fitting, 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,Other Products. The rope-363 Series MBL x FI Socket.

Drawing tow

• 1 Newly-314 Series Bush.315 Series Long Nipple.

Crimping

• 2 Drawn tow is then fed into compression boxes,318 Series FI x Union, at a rate of 9-15 crimps per inch (3-6 per cm).412 Series MI x Elbow.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)317 Series Cap.323 Series Stop End.

Cutting

• 4 Following heat setting,401 C x Elbow. 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)453 Series C x FI Wall Plated Elbow.601 Series C x Tee, such ascarpet,polyester filaments are cut into 6 inch (15 cm)684 Series C x FI Tee.

The Future

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