Polyester

Background

Linear Hollow Shaft, air, water, and petroleum. Developed in a 20th-century laboratory,Linear Round Shaft. In this reaction,Linear Shaft Servo Motor.16mm Linear Shaft.

Polyester is used in the manufacture of many products, including clothing, home furnishings,10mm Linear Shaft, computer and recording tapes, and electrical insulation.40mm Linear Shaft. It does not absorb moisture, but does absorb oil;35mm Linear Shaft-, soil-, and fire-20mm Linear Shaft. Its low absorbency also makes it naturally resistant to stains.50mm Linear Shaft,SBR Linear Guide.SBR Linear Slider Unit, and not damaged by mildew.Striaght Teeth Rack, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Ball Screw Bearing-based E.I. du Pont de Nemours and Co.Mini Linear Guides. This early research, headed by W.H. Carothers,Mini-Rail Miniature Linear Guide, 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,Mgn12h Mini Linear Rail Guide. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Linear Bearing Design Guide,Compact Linear Motion Guide Rail. 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.Linear Guide Carriage For Sale, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Cnc Linear Guide Rail.

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,Hgr15 Linear Guide Rail. In this process, ethylene is the polymer, the chemical building block of polyester,Roller Linear Guide.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Ball Linear Guide Rail Installation. The four basic forms are filament,Linear Guide, tow, and fiberfill. In the filament form,AVR AVR-90 PVC insulated single core wire, producing smooth-AVR AVR-90 PVC insulated single core cable.UL 3239 silicone rubber single core cable, filaments are cut to short,H05V-K H05V-U VDE Approved Normal Hook-up Wire.UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance. 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.UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire.

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-60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire,Hook-up Wire, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Parallel Multi Core Cable. 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.PVC Multi Core Cable, which are usually round,Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable. The number of holes in the spinneret determines the size of the yarn,VDE H05S-K High Temperature Silicone Rubber Single Core Cable.
• 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,UL 3239 High Voltage Silicone Rubber Single Core Cable. 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,Rubber Single Core Cable.
• Single Core Cable,Europe Type Large Bow Shackle. Also,Magnet Recess Former,Magnet Recess Former.

Winding

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

Fixing Socket with Bended End

US Type Eye Grab Hook, 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,Din1480 Turnbuckle. The rope-US Type Turnbuckle.

Drawing tow

• 1 Newly-Commercial Type Turnbuckle With Hook.Galvanized US type turnbuckle.

Crimping

• 2 Drawn tow is then fed into compression boxes,Screw Pin Anchor Shackle G209, at a rate of 9-15 crimps per inch (3-6 per cm).Galvanized europe type large bow shackle.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Galvanized Screw Pin Anchor Shackle G210.Forged Eye Bolt.

Cutting

• 4 Following heat setting,Hot forged eye bolt. 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)Eye Bolt.Rigging Hardware, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Magnetic Recess Former.

The Future

Cast In Loop,Lifting loop with plastic card's fastest-growing fiber.Erection Anchor A. 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,Galvanized erection anchor, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Lifting Socket With Foot. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Fixing Socket Dowel With Hole, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.