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Topic: Acetal


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In the News (Wed 22 May 19)

  
  Acetal POM Sheet, Rod and Tube by Excel Plastics
Acetal POM Sheet, Rod and Tube by Excel Plastics
Excel Plastics is a distributor of Acetal POM Plastic Sheet, Round Rod, Hex Rod, Bar Stock, Balls, Discs and Round Tubes.
We have glass filled, chemical resistant, antistatic, low friction, general purpose, high elongation, and Teflon® filled acetals.
acetal-rod-sheet.com   (144 words)

  
  Acetal Copolymer On B2BManufactures.Com From China & Taiwan Acetal Copolymer Manufacturers& Suppliers
Acetal Copolymer - Changzhou Loen Chemical Co., Ltd.
Acetal Copolymer - Zhuzhou Hongda Polymer Co., Ltd.
Acetal Copolymer - NCM Hersbit Chemical Co., Ltd.
www.manufacturers.com.tw /chemical/Acetal-opolymers.html   (612 words)

  
 Acetal (POM) Property Data
Acetal is subject to degradation in acid and base solutions and is not readily available in a flame-retardant grade.
Acetal, first developed in the late 1950s, is available as a homopolymer (such as DuPont Delrin®) or copolymer (such as Ticona's Celcon®).
This search returns about 80 acetal grades; generally only grades with at least 20% glass or carbon fiber reinforcement are stiff enough to meet this flexural modulus requirement.
www.matweb.com /reference/acetal-polymer.asp   (623 words)

  
 Acetal Precision Machining
Welcome to the US Acetal Precision Machining supply directory.
acetal, polycarbonate, celtec, cutting board, acrylite,...celtec, cutting board, acrylite, polyethelene, precision, board, sign supplies, elrin, polystyrene,...one shot, polypropalene, plastic, poly, machining, welding rod, routing...
...rod and tube, laser cutting, precision sawing, and cnc machining of plastic materials, diversified supplier...of plastic ever produced including acetal, polycarbonate, teflon, and victrex...
www.openfos.com /product/Acetal-Precision-Machining.A3   (314 words)

  
 Acetal Delrin - Online Machine Shop - Delrin Parts
Acetal is formed from combining aldehydes and alcohol.
Acetal homopolymer and acetal copolymer are two types of acetal.
Acetal sheet is resistance to wear especially in wet environments
www.emachineshop.com /material-plastic/acetal.htm   (83 words)

  
  Acetal Properties and Technical Information- Dynalab Corp
Acetal is a by-product of a two-step reaction between an alcohol and an aldehyde.
Acetal is a tough material with good dimensional stability, and a low coefficient of friction.
Acetal is formaldehyde based and care should be taken when processing; formaldehyde released is a skin and eye irritant.
www.dynalabcorp.com /technical_info_acetal.asp   (189 words)

  
  Penn Fibre
Because acetal absorbs far less moisture than type 6 and type 6/6 nylons, it is widely used for many mechanical and industrial applications requiring closer tolerances and greater dimensional stability.
Acetal materials are available as homopolymers and copolymers – exhibiting similar basic characteristics, but with some specific properties variations.
Thermoformable acetals exhibit ease of processing, mechanical strength, dimensional stability, chemical resistance, scratch and wear resistance and are paintable and bondable.
www.pennfibre.com /materials_acetal.cfm   (278 words)

  
  ACETAL : Encyclopedia Entry
Acetals are stable compared to hemiacetals but their formation is reversible as with esters.
Acetals are important in nature, for example in solution the most stable form of glucose is its cyclic hemiacetal and maltose is an acetal made from two glucose units.
Acetals are sometimes used as protecting groups for carbonyl groups in organic synthesis as they are stable with respect to hydrolysis by bases.
www.bibleocean.com /OmniDefinition/Acetal   (271 words)

  
 Injection Molding Magazine
Acetal’s chemical resistance allows it to be used as packaging and dispensing components for many solvents, fuel, and cosmetic products.
Acetals are dimensionally stable materials in spite of the fact that they have a high mold shrinkage factor.
Acetals are widely specified for precision parts, such as bearings and gears, that have to retain their size for extended periods of time.
www.immnet.com /articles?article=2939   (1074 words)

  
 Acetal   (Site not responding. Last check: )
An acetal is a functional group or molecule containing the functional group of a carbon bond ed to two -OR groups.
Acetals can be used as carbonyl - protecting group s.
Esd and conductive pvc, acetal, styrene and pvc.
www.serebella.com /encyclopedia/article-Acetal.html   (472 words)

  
 acetal
Acetals are hard, tough and resilient with good dimensional stability and high impact resistance even at very low temperatures.
There are few adhesives for acetal so joining tends to be by traditional mechanical methods such as snap fit joints, threading and riveting.
Acetal is used where components need to be tough, resilient and require good dimensional stability.
www.rutlandplastics.co.uk /acetal.html   (217 words)

  
 Process for preparing polymeric acetal carboxylate salts - Patent 4140676
Although satisfactory performance was achieved using the polymeric acetal carboxylates prepared by the procedures described in the above-identified applications, the polymeric acetal carboxylate prepared by such procedures frequently required as much as 24 hours to saponify the ester of the polymeric acetal carboxylate to the corresponding alkali metal salt.
Broadly described, the polymeric acetal carboxylates can be prepared by converting a hemi-acetal ester of glyoxylic acid to the corresponding aldehyde ester, and polymerizing the aldehyde ester using a polymerization initiator to form the polymeric acetal carboxylate ester.
The number of repeating units, i.e., the average value of n, in the polymeric acetal carboxylate is important since the effectiveness of the polymeric salt as a chelant, sequestrant and cleaning and detergency builder is affected by the average chain length.
www.freepatentsonline.com /4140676.html   (3274 words)

  
 Acetal   (Site not responding. Last check: )
Acetal provides high strength and stiffness while offering enhanced dimensional stability and ease of machining.
Dielux® is a PTFE-filled Acetal copolymer that is frequently used in place of traditional metal and plastic bearing materials when low friction, excellent wear properties, and good dimensional stability are required.
Delrin® is a family of Acetal homopolymers whose properties include low water absorption and superior creep resistance, tensile strength, and fatigue endurance.
www.aetnaplastics.com /ws-acetal.htm   (310 words)

  
 Plastics and composites fabrication, injection molding, pultrusion, and high-pressure laminates.
Acetal, within the boundaries of thermoplastic chemistry, is a virtually faultless material.
Delrin, which is an acetal homopolymer, and BASF Ultraform, which is an acetal copolymer formed by polymerization of two monomers.
Acetal shapes are produced using state-of-the-art equipment and premium resins.
www.itenindustries.com /acetal.htm   (484 words)

  
 central Plastics : Acetal Polyoxy Methylene Datasheet   (Site not responding. Last check: )
Acetal is the common name for a family of thermoplastics with the chemical name "PolyOxy-Methylene".
Acetal provides high strength and stiffness, enhanced dimensional stability, and is easy to machine.
acetal homopolymer offers slightly higher mechanical properties than acetal copolymer, but may contain a low density center (also known as "center line porosity") especially in large cross-sections.
www.centralplastics.biz /acetal_p.htm   (311 words)

  
 Injection Molding Magazine
Acetal doesn’t have to cycle slower than any other crystalline material, even parts with thick walls like this one.
The difference between acetal and other unfilled crystalline materials is that acetal gates need to be bigger—two-thirds of the wall thickness for gate depth.
Acetal doesn’t need to be dried unless it has carbon fl in it for color or if it’s regrind that has been sitting around for a week or so in opened containers when the humidity level is high.
www.immnet.com /articles/2005/May/2608   (1866 words)

  
 Basics of Design Engineering - Engineering Materials - Plastics and properties - ACETAL
Acetals produced in the U.S. include homopolymers by Du Pont Co. (Delrin) and copolymers by Celanese Engineering Plastics Div., Hoechst Celanese Corp. (Celcon) and copolymers by BASF Corporation Plastic Materials (Ultraform).
Homopolymer acetals have high resistance to organic solvents, excellent dimensional stability, a low coefficient of friction, and outstanding abrasion resistance among thermoplastics.
Strength of acetal copolymer is only slightly reduced after aging for one year in air at 240 °F. Impact strength holds constant for the first six months, and falls off about one-third during the next six-month period.
www.machinedesign.com /BDE/materials/bdemat2/bdemat2_3.html   (1338 words)

  
 Acetal (Acetal) Plastic Resin
Acetal (POM) - A thermoplastic produced by the addition polymerization of an aldehyde through the carbonyl function, yielding unbranched polyoxymethylene chains of great length.
The acetal resins are among the strongest and stiffest of all thermoplastics, and are characterized by good fatigue life, low moisture sensitivity, high resistance to solvents and chemicals, and good electrical properties.
Acetals may be processed by conventional injection molding and extrusion techniques.
www.ides.com /generics/Acetal.htm   (164 words)

  
 Acetal
As a semi-crystalline material, acetal is also characterized by a low coefficient of friction and good wear properties –– especially in wet environments.
Because acetal absorbs minimal amounts of moisture, its physical properties remain constant in a variety of environments.
Acetal is ideally suited for close tolerance mechanical parts and electrical insulators which require strength and stiffness.
www.lehighvalleyplastics.com /acetal.htm   (441 words)

  
 A Guide to Acetal   (Site not responding. Last check: )
Acetal, or polyoxymethylene, refers to two distinct yet similar products: acetal homopolymer and acetal copolymer.
The main molecular chain of acetal homopolymer is the backbone of the acetal copolymer chain, as acetal copolymer adds ethylene oxide randomly throughout the acetal homopolymer chain.
Thus, processing of acetal requires special attention to be paid to temperature during molding as exceeding the thermal degradation point (the temperature at which the material will begin to break down) will produce rapid decomposition resulting in formaldehyde gas.
www.ptsllc.com /acetal_intro.htm   (262 words)

  
 Acetal Plastics - Midland Plastics
Acetal plastic’s benefits include a low coefficient of friction, high strength, low moisture absorption and easy machinability.
Acetal plastic retains its toughness through a broad temperature range and is a good choice in wet environments.
Copolymer acetal is more resistant to hot water and hot air than the homopolymer formulation.
www.midlandplastics.com /srtd_acetel.htm   (161 words)

  
 Acetals - Plastics International
Acetal (polyoxymethylene, POM) is a thermoplastic polymer commercialized in the early 1960's.
In most cases, acetal homopolymer and copolymer can be interchanged because many material properties are within approximately 10% of each other.
Tecaform™ HPV 13 is a brown homopolymer acetal with an internal PTFE lubricant.
www.plasticsintl.com /acetals.htm   (592 words)

  
 Acetal Plastic Supplier- acetal sheet, acetal tube, and acetal rod
Acetal resins have high tensile strength, stiffness, resilience, fatigue endurance and moderate toughness.
Among thermoplastics, acetals have high resistance to organic sol-vents, excellent dimensional stability, a low coefficient of friction, and outstanding abrasion resistance.
Also, acetals absorb low amounts of moisture, and are resistant to a wide range of solvents.
www.olsonmfg.com /Material_Distribution/Material_List/Acetal.html   (155 words)

  
 Acetal
Acetal polymers, referred to chemically as PolyOxyMethylene, are semi-crystalline engineering themoplastics made by the polymerization of formaldehyde.
Copolymer Acetals remain tough through broad temperature ranges and are more resistant to hot water, hot air, and creep than the Homopolymer Acetals.
Although Homopolymer Acetals should not be used with strong caustics, they generally have slightly higher mechanical and thermal properties than Copolymer Acetals.
www.tridentepp.com /Acetal.html   (783 words)

  
 Acetal Machined Parts
Acetal is a name for a family of thermoplastics with the chemical name PolyOxyMethylene.
Acetal has high strength and stiffness characteristics, it has enhanced dimensional stability, and it is easy to machine.
Acetal also has a low coefficient of friction and good wear properties.
www.m-p.com /acetal_machined_parts.htm   (319 words)

  
 ACETAL   (Site not responding. Last check: )
Acetal thermoplastic is manufactured by the polymerization of formaldehyde.
Acetal is available in general purpose grade and several acetal blends are available for special requirements including Acetal/PTFE and Acetal/glass fiber.
Acetal has a smooth hard glossy surface, somewhat slippery to the touch.
www.angelfire.com /mo/jbcplastic/acetal.html   (71 words)

  
 Synthesis of acetals
The acetal is derived from a hemiacetal and an alcohol making the second ether group.
The acetal group can be recognized by finding a carbon with TWO ether functional group attached to it.
The Alpha position is defined as the ether oxygen being on the opposite side of the ring as the C # 6.
www.elmhurst.edu /~chm/vchembook/704synacetal.html   (249 words)

  
 Acetal (POM): Ultraform® - BASF Corporation Plastics Portal
The Ultraform acetal product range comprises versatile engineering plastics having varied properties designed for use in exacting components capable of withstanding high stresses.
The Ultraform acetal grades fulfill the demands imposed on an engineering material in especially high measure.
Special mention should be made of the chemical resistance of Ultraform® acetal, particularly with respect to conventional grades of gasoline (even those containing methanol and ethanol) as well as to diesel fuels (also biodiesel).
iwww.plasticsportal.com /products/ultraform.html   (459 words)

  
 Mechanical Acetal
Acetal copolymer is an engineering thermoplastic based on formaldehyde polymerization technology.
Acetal copolymer resin is produced by a number of companies, including Celanese and BASF, which sell these products under their trade names of Celcon and Ultraform.
Acetal copolymer has an exceptional balance of tensile properties, shear strength, stiffness, and toughness.
www.polymerplastics.com /mechanical_acetala.shtml   (243 words)

  
 Boedeker Plastics : Acetal Polyoxy Methylene Datasheet
Acetal is the common name for a family of thermoplastics with the chemical name "PolyOxy-Methylene".
Acetal copolymer may exhibit center line porosity, but porosity-free material is available.
acetal homopolymer offers slightly higher mechanical properties than acetal copolymer, but may contain a low density center (also known as "center line porosity") especially in large cross-sections.
www.boedeker.com /acetal_p.htm   (483 words)

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