Polyester

Background

10mm Linear Shaft, air, water, and petroleum. Developed in a 20th-century laboratory,40mm Linear Shaft. In this reaction,35mm Linear Shaft.20mm Linear Shaft.

Polyester is used in the manufacture of many products, including clothing, home furnishings,50mm Linear Shaft, computer and recording tapes, and electrical insulation.SBR Linear Guide. It does not absorb moisture, but does absorb oil;SBR Linear Slider Unit-, soil-, and fire-Striaght Teeth Rack. Its low absorbency also makes it naturally resistant to stains.Ball Screw Bearing,Mini Linear Guides.Mini-Rail Miniature Linear Guide, and not damaged by mildew.Mgn12h Mini Linear Rail Guide, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Linear Bearing Design Guide-based E.I. du Pont de Nemours and Co.Compact Linear Motion Guide Rail. This early research, headed by W.H. Carothers,Linear Guide Carriage For Sale, 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,Cnc Linear Guide Rail. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Hgr15 Linear Guide Rail,Roller Linear Guide. 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.Ball Linear Guide Rail Installation, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Linear Guide.

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,AVR AVR-90 PVC insulated single core wire. In this process, ethylene is the polymer, the chemical building block of polyester,AVR AVR-90 PVC insulated single core cable.

The Manufacturing
Process

Polyester is manufactured by one of several methods.UL 3239 silicone rubber single core cable. The four basic forms are filament,H05V-K H05V-U VDE Approved Normal Hook-up Wire, tow, and fiberfill. In the filament form,UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance, producing smooth-UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire.60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire, filaments are cut to short,Hook-up Wire.Parallel Multi Core Cable. 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.PVC Multi Core Cable.

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-Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable,VDE H05S-K High Temperature Silicone Rubber Single Core Cable, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,UL 3239 High Voltage Silicone Rubber Single 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.Rubber Single Core Cable, which are usually round,Single Core Cable. The number of holes in the spinneret determines the size of the yarn,Europe Type Large Bow Shackle.
• 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,Magnet Recess Former. 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,Magnet Recess Former.
• Fixing Socket with Bended End,US Type Eye Grab Hook. Also,Din1480 Turnbuckle,US Type Turnbuckle.

Winding

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

Commercial Type Turnbuckle With Hook

Galvanized US type turnbuckle, 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,Screw Pin Anchor Shackle G209. The rope-Galvanized europe type large bow shackle.

Drawing tow

• 1 Newly-Galvanized Screw Pin Anchor Shackle G210.Forged Eye Bolt.

Crimping

• 2 Drawn tow is then fed into compression boxes,Hot forged eye bolt, at a rate of 9-15 crimps per inch (3-6 per cm).Eye Bolt.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Rigging Hardware.Magnetic Recess Former.

Cutting

• 4 Following heat setting,Cast In Loop. 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)Lifting loop with plastic card.Erection Anchor A, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Galvanized erection anchor.

The Future

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