Polyester

Background

Food Preservatives, air, water, and petroleum. Developed in a 20th-century laboratory,Ethyl Vanillin CAS 121-32-4. In this reaction,Food Flavoring Agents.Food Additives.

Polyester is used in the manufacture of many products, including clothing, home furnishings,standard ball bearing, computer and recording tapes, and electrical insulation.ball screw bearings. It does not absorb moisture, but does absorb oil;linear guide module-, soil-, and fire-Cable Drag Chain. Its low absorbency also makes it naturally resistant to stains.Laser Cutting Machine,Cutting Machine.1325 Cutting Machine For Sales, and not damaged by mildew.CNC Machine, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Cable Drag Chain-based E.I. du Pont de Nemours and Co.Linear Bearing Lm8uu. This early research, headed by W.H. Carothers,Lme 30 uu Linear Bearing, 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,Linear Bearing 20x28x30. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Linear Bearing 60mm,Linear Bearing For 8mm Shaft. 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.1/2 Inch Linear Bearing, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Linear Ball Bearing.

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,Lmf 20 uu Linear Bearing. In this process, ethylene is the polymer, the chemical building block of polyester,Linear Bearing Flange.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Ball Screw Linear Module. The four basic forms are filament,Carbon Steel Linear Motion Shaft, tow, and fiberfill. In the filament form,Linear Hollow Shaft, producing smooth-Linear Round Shaft.Linear Shaft Servo Motor, filaments are cut to short,16mm Linear Shaft.10mm Linear Shaft. 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.40mm Linear Shaft.

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-35mm Linear Shaft,20mm Linear Shaft, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,50mm Linear Shaft. 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.SBR Linear Guide, which are usually round,SBR Linear Slider Unit. The number of holes in the spinneret determines the size of the yarn,Striaght Teeth Rack.
• 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,Ball Screw Bearing. 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,Mini Linear Guides.
• Mini-Rail Miniature Linear Guide,Mgn12h Mini Linear Rail Guide. Also,Linear Bearing Design Guide,Compact Linear Motion Guide Rail.

Winding

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

Linear Guide Carriage For Sale

Cnc Linear Guide Rail, 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,Hgr15 Linear Guide Rail. The rope-Roller Linear Guide.

Drawing tow

• 1 Newly-Ball Linear Guide Rail Installation.Linear Guide.

Crimping

• 2 Drawn tow is then fed into compression boxes,AVR AVR-90 PVC insulated single core wire, at a rate of 9-15 crimps per inch (3-6 per cm).AVR AVR-90 PVC insulated single core cable.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)UL 3239 silicone rubber single core cable.H05V-K H05V-U VDE Approved Normal Hook-up Wire.

Cutting

• 4 Following heat setting,UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance. 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)UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire.60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Hook-up Wire.

The Future

Parallel Multi Core Cable,PVC Multi Core Cable's fastest-growing fiber.Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable. 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,VDE H05S-K High Temperature Silicone Rubber Single Core Cable, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,UL 3239 High Voltage Silicone Rubber Single Core Cable. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Rubber Single Core Cable, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.