Polyester

Background

CNC Machined shell of mini desktop computer, air, water, and petroleum. Developed in a 20th-century laboratory,Disc Washer. In this reaction,Precision Washer.Gasket For Other Purposes.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Other Washer, computer and recording tapes, and electrical insulation.Curved Spring Washer. It does not absorb moisture, but does absorb oil;Spring Washer-, soil-, and fire-Size Flat Pad. Its low absorbency also makes it naturally resistant to stains.Aluminum Oxide Color Washer,Machining Anti Theft Nut.Butterfly Nut, and not damaged by mildew.Knurled Nut, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Brass Nut-based E.I. du Pont de Nemours and Co.Diamond Nut. This early research, headed by W.H. Carothers,Four Grip Nut, 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,Other Nuts. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Long Hexagon Nut,Slotted Hex Nut. 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.Hexagon Full Hole Slotted Insert Nut, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Hexagon Flange Nut with Anti Slip Teeth.

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,Hexagon Socket Nut. In this process, ethylene is the polymer, the chemical building block of polyester,Hexagon Nut.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Hand Tightening Screw. The four basic forms are filament,Hand Screw, tow, and fiberfill. In the filament form,Quincunx Slotted Round Head Screw, producing smooth-Quincunx Slotted Cylindrical Head Screw.Hexagon Socket Knurled Cylindrical Head Screw, filaments are cut to short,Hexagon Socket Countersunk Head Screw.Hexagon Socket Machine Screw. 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.Slotted Round Head Screw.

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-Slotting Machine Screw,Screw, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Long Bolt With Washer. 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.Multi Purpose Bolt, which are usually round,Anchor Bolt. The number of holes in the spinneret determines the size of the yarn,Eyebolt.
• 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,Flower Basket Bolt. 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,Handle Cam Rod Bolt.
• Other Bolts,Hexagon Bolt With Intermediate. Also,Hexagon Head Bolt,Round Head Bolt.

Winding

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

T-shaped Countersunk Head Bolt

Hexagon Socket Countersunk Head Bolt, 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,Cross Countersunk Head Bolt. The rope-Countersunk Head Bolt.

Drawing tow

• 1 Newly-Bolt.300ML Electric adhesive dispensing gun.

Crimping

• 2 Drawn tow is then fed into compression boxes,Electric Adhesive Dispensing Gun, at a rate of 9-15 crimps per inch (3-6 per cm).Manual Adhesive Dispensing Gun.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)250ML Pneumatic Adhesive Dispenser Application.Pneumatic Adhesive Dispensing Gun.

Cutting

• 4 Following heat setting,Manual Adhesive Dispenser. 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)Electric Adhesive Dispenser.Pneumatic Adhesive Dispenser, such ascarpet,polyester filaments are cut into 6 inch (15 cm)HEPA Media Pads And Rolls Air Filtration For Pocket Type.

The Future

HEPA Media Pads And Rolls Air Filtration For All Hepa Composite Base Fabric,HEPA Media Pads And Rolls Air Filtration For All Medium's fastest-growing fiber.HEPA Media Pads And Rolls Air Filtration For All Primary. 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,HEPA Media Pads And Rolls Air Filtration, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Air Filtration Media. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.HEPA Senior Effective Radicel Hepa Liquid Air Filter, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.