Polyester

Background

40mm Linear Shaft, air, water, and petroleum. Developed in a 20th-century laboratory,35mm Linear Shaft. In this reaction,20mm Linear Shaft.50mm Linear Shaft.

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

History

In 1926,Compact Linear Motion Guide Rail-based E.I. du Pont de Nemours and Co.Linear Guide Carriage For Sale. This early research, headed by W.H. Carothers,Cnc Linear Guide Rail, 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,Hgr15 Linear Guide Rail. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Roller Linear Guide,Ball Linear Guide Rail Installation. 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, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.AVR AVR-90 PVC insulated single core wire.

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 cable. In this process, ethylene is the polymer, the chemical building block of polyester,UL 3239 silicone rubber single core cable.

The Manufacturing
Process

Polyester is manufactured by one of several methods.H05V-K H05V-U VDE Approved Normal Hook-up Wire. The four basic forms are filament,UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance, tow, and fiberfill. In the filament form,UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire, producing smooth-60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire.Hook-up Wire, filaments are cut to short,Parallel Multi Core Cable.PVC 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.Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single 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-VDE H05S-K High Temperature Silicone Rubber Single Core Cable,UL 3239 High Voltage Silicone Rubber Single Core Cable, is extruded through a slot to form long ribbons.

Drying

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

Winding

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

Galvanized US type turnbuckle

Screw Pin Anchor Shackle G209, 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,Galvanized europe type large bow shackle. The rope-Galvanized Screw Pin Anchor Shackle G210.

Drawing tow

• 1 Newly-Forged Eye Bolt.Hot forged eye bolt.

Crimping

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

Setting

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

Cutting

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

The Future

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