Polyester

Background

IC Semiconductor Packaging Mold, air, water, and petroleum. Developed in a 20th-century laboratory,Lead Frame Mold. In this reaction,Lithium Battery Mould.Cemented Carbide Mould.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Brass Clamp for pipe, computer and recording tapes, and electrical insulation.BSPT Brass Compression Fitting. It does not absorb moisture, but does absorb oil;462 MBL x MI Elbow-, soil-, and fire-363 MBL x FI Socket. Its low absorbency also makes it naturally resistant to stains.MBL Fitting,Hose Fitting PEX.Flexible hose fitting, and not damaged by mildew.319 Extension Fitting, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Brass Fitting-based E.I. du Pont de Nemours and Co.414 MI x FI Elbow. This early research, headed by W.H. Carothers,ecFIT Brass Threaded Fitting, 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 1946,319 Extension Fitting. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.NPT Brass Threaded Fitting,Brass Threaded Fitting. 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.BSPT Brass Threaded Fitting, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.312 MI x Socket.

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,Galvanized Fitting. In this process, ethylene is the polymer, the chemical building block of polyester,Nickel Plated Fitting.

The Manufacturing
Process

Polyester is manufactured by one of several methods.653 Wallplated Tee. The four basic forms are filament,Brass Compression Fitting, tow, and fiberfill. In the filament form,Chrome Plated Fitting, producing smooth-ecFIT Brass Fitting.ecFIT Brass Compression Fitting, filaments are cut to short,401 C x Elbow.323 Stop End. 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.302 C x MI Coupler.

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-BSP Brass Compression Fitting,Other Products, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,363 Series MBL x FI Socket. 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.314 Series Bush, which are usually round,315 Series Long Nipple. The number of holes in the spinneret determines the size of the yarn,318 Series FI x Union.
• 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,412 Series MI x Elbow. 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,317 Series Cap.
• 323 Series Stop End,401 C x Elbow. Also,453 Series C x FI Wall Plated Elbow,601 Series C x Tee.

Winding

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

684 Series C x FI Tee

All-stainless Kitchen Scissors, 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,Upgrade Version Of Multi-purposed Kitchen Scissors. The rope-Kitchen Scissors For Small Task.

Drawing tow

• 1 Newly-Multi-purposed Scissors.Kitchen Scissors Used For Cutting Chicken And Fish With Bone.

Crimping

• 2 Drawn tow is then fed into compression boxes,Y Shape Handle Julienne Blade, at a rate of 9-15 crimps per inch (3-6 per cm).F Shape Serration Blade.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)F Shape Handle Serration Blade.All-stainless Kitchen Scissors.

Cutting

• 4 Following heat setting,Multi-purposed Kitchen Scissors. 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)Upgrade Version Of Multi-purposed Scissors.Multi-purposed Scissors, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Chicken Bone Kitchen Scissors.

The Future

Kitchen scissors Used For Cutting Fish With Bone,Kitchen scissors Used For Cutting Chicken's fastest-growing fiber.Multi-function Y-shape Planer. 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,Peeler, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,5cr15mov Multi-purpose Kitchen Scissors Household Multi-functional Strong Chicken Bone All Steel Stainless Food. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Multi-purposed All-stainless Kitchen Scissors, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.