Polyester

Background

Slotted Hex Nut, air, water, and petroleum. Developed in a 20th-century laboratory,Hexagon Full Hole Slotted Insert Nut. In this reaction,Hexagon Flange Nut with Anti Slip Teeth.Hexagon Socket Nut.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Hexagon Nut, computer and recording tapes, and electrical insulation.Hand Tightening Screw. It does not absorb moisture, but does absorb oil;Hand Screw-, soil-, and fire-Quincunx Slotted Round Head Screw. Its low absorbency also makes it naturally resistant to stains.Quincunx Slotted Cylindrical Head Screw,Hexagon Socket Knurled Cylindrical Head Screw.Hexagon Socket Countersunk Head Screw, and not damaged by mildew.Hexagon Socket Machine Screw, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Slotted Round Head Screw-based E.I. du Pont de Nemours and Co.Slotting Machine Screw. This early research, headed by W.H. Carothers,Screw, 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,Long Bolt With Washer. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Multi Purpose Bolt,Anchor Bolt. 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.Eyebolt, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Flower Basket Bolt.

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,Handle Cam Rod Bolt. In this process, ethylene is the polymer, the chemical building block of polyester,Other Bolts.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Hexagon Bolt With Intermediate. The four basic forms are filament,Hexagon Head Bolt, tow, and fiberfill. In the filament form,Round Head Bolt, producing smooth-T-shaped Countersunk Head Bolt.Hexagon Socket Countersunk Head Bolt, filaments are cut to short,Cross Countersunk Head Bolt.Countersunk Head Bolt. 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.Bolt.

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-300ML Electric adhesive dispensing gun,Electric Adhesive Dispensing Gun, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Manual Adhesive Dispensing Gun. 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.250ML Pneumatic Adhesive Dispenser Application, which are usually round,Pneumatic Adhesive Dispensing Gun. The number of holes in the spinneret determines the size of the yarn,Manual Adhesive Dispenser.
• 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,Electric Adhesive Dispenser. 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,Pneumatic Adhesive Dispenser.
• HEPA Media Pads And Rolls Air Filtration For Pocket Type,HEPA Media Pads And Rolls Air Filtration For All Hepa Composite Base Fabric. Also,HEPA Media Pads And Rolls Air Filtration For All Medium,HEPA Media Pads And Rolls Air Filtration For All Primary.

Winding

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

HEPA Media Pads And Rolls Air Filtration

Air Filtration Media, 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,HEPA Senior Effective Radicel Hepa Liquid Air Filter. The rope-HEPA Senior Effective Radicel Fine Air Filter V Bank With Cleanroom.

Drawing tow

• 1 Newly-HEPA Senior Effective Radicel Extend Surface Carbon V Style Air Filter.HEPA Senior Effective Radicel Box Air Filter With Clean Room.

Crimping

• 2 Drawn tow is then fed into compression boxes,HEPA Senior Effective Radicel Box Air Filter For Clapboard, at a rate of 9-15 crimps per inch (3-6 per cm).Medium Effective Finepak Pocket Air Filter Media F5.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Medium Effective Finepak Pocket Or Bag Air Filter.Medium Effective Finepak Box Air Filter With Clapboard F7.

Cutting

• 4 Following heat setting,Primary Effective Prepak Effect Panel Air Filter. 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)Primary Effective Prepak Keel Bracket Air Filter.Q-light small LED indicator light S80L, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Induction Loop Controller.

The Future

Nylon Cable Tie,Anti-UV PA66 Nylon Cable Tie's fastest-growing fiber.New Product Nylon Cable Ties with good price. 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,Vehicle Restraint with good price, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Vehicle Restraint. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Vehicle Restraint, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.