Polyester

Background

Tungsten Steel Single Straight Hole Threaded Round Rod With, air, water, and petroleum. Developed in a 20th-century laboratory,TSF44 Tungsten Steel Carving Knife. In this reaction,JG Coordinate Grinding.Tungsten Carbide Steel.

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

History

In 1926,Lithium Battery Mould-based E.I. du Pont de Nemours and Co.Cemented Carbide Mould. This early research, headed by W.H. Carothers,Brass Clamp for pipe, 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,BSPT Brass Compression Fitting. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.462 MBL x MI Elbow,363 MBL x FI Socket. 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.MBL Fitting, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Hose Fitting PEX.

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,Flexible hose fitting. In this process, ethylene is the polymer, the chemical building block of polyester,319 Extension Fitting.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Brass Fitting. The four basic forms are filament,414 MI x FI Elbow, tow, and fiberfill. In the filament form,ecFIT Brass Threaded Fitting, producing smooth-319 Extension Fitting.NPT Brass Threaded Fitting, filaments are cut to short,Brass Threaded Fitting.BSPT Brass Threaded 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.312 MI x Socket.

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-Galvanized Fitting,Nickel Plated Fitting, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,653 Wallplated Tee. 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.Brass Compression Fitting, which are usually round,Chrome Plated Fitting. The number of holes in the spinneret determines the size of the yarn,ecFIT Brass Fitting.
• 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,ecFIT 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,401 C x Elbow.
• 323 Stop End,302 C x MI Coupler. Also,BSP Brass Compression Fitting,Other Products.

Winding

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

363 Series MBL x FI Socket

314 Series Bush, 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,315 Series Long Nipple. The rope-318 Series FI x Union.

Drawing tow

• 1 Newly-412 Series MI x Elbow.317 Series Cap.

Crimping

• 2 Drawn tow is then fed into compression boxes,323 Series Stop End, at a rate of 9-15 crimps per inch (3-6 per cm).401 C x Elbow.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)453 Series C x FI Wall Plated Elbow.601 Series C x Tee.

Cutting

• 4 Following heat setting,684 Series C x FI Tee. 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)All-stainless Kitchen Scissors.Upgrade Version Of Multi-purposed Kitchen Scissors, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Kitchen Scissors For Small Task.

The Future

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