Polyester

Background

Motor Progressive Die, air, water, and petroleum. Developed in a 20th-century laboratory,Stainless Steel LED Mould. In this reaction,Terminal Stamping Die.Wire Drawing Core Die.

Polyester is used in the manufacture of many products, including clothing, home furnishings,IC Semiconductor Packaging Mold, computer and recording tapes, and electrical insulation.Lead Frame Mold. It does not absorb moisture, but does absorb oil;Lithium Battery Mould-, soil-, and fire-Cemented Carbide Mould. Its low absorbency also makes it naturally resistant to stains.Brass Clamp for pipe,BSPT Brass Compression Fitting.462 MBL x MI Elbow, and not damaged by mildew.363 MBL x FI Socket, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,MBL Fitting-based E.I. du Pont de Nemours and Co.Hose Fitting PEX. This early research, headed by W.H. Carothers,Flexible hose 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 1946,319 Extension Fitting. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Brass Fitting,414 MI x FI Elbow. 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.ecFIT Brass Threaded Fitting, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.319 Extension 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,NPT Brass Threaded Fitting. In this process, ethylene is the polymer, the chemical building block of polyester,Brass Threaded Fitting.

The Manufacturing
Process

Polyester is manufactured by one of several methods.BSPT Brass Threaded Fitting. The four basic forms are filament,312 MI x Socket, tow, and fiberfill. In the filament form,Galvanized Fitting, producing smooth-Nickel Plated Fitting.653 Wallplated Tee, filaments are cut to short,Brass Compression Fitting.Chrome 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.ecFIT Brass 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-ecFIT Brass Compression Fitting,401 C x Elbow, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,323 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.302 C x MI Coupler, which are usually round,BSP Brass Compression Fitting. The number of holes in the spinneret determines the size of the yarn,Other Products.
• 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,363 Series MBL x FI Socket. 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,314 Series Bush.
• 315 Series Long Nipple,318 Series FI x Union. Also,412 Series MI x Elbow,317 Series Cap.

Winding

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

323 Series Stop End

401 C 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,453 Series C x FI Wall Plated Elbow. The rope-601 Series C x Tee.

Drawing tow

• 1 Newly-684 Series C x FI Tee.All-stainless Kitchen Scissors.

Crimping

• 2 Drawn tow is then fed into compression boxes,Upgrade Version Of Multi-purposed Kitchen Scissors, at a rate of 9-15 crimps per inch (3-6 per cm).Kitchen Scissors For Small Task.

Setting

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

Cutting

• 4 Following heat setting,Y Shape Handle Julienne Blade. 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)F Shape Serration Blade.F Shape Handle Serration Blade, such ascarpet,polyester filaments are cut into 6 inch (15 cm)All-stainless Kitchen Scissors.

The Future

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