High density polyethylene hdpe is a high molecular weight polyolefin material. Call or email us and we will make sure you get the right product or part for the job. Hdpe provides a whole host of benefits to manufacturers, retailers and consumers. In fact, polyethylene pipe has a long and distinguished history of service to the gas, oil, mining and other industries. Mechanical properties value unit dineniso tensile strength at yield 25 mpa 527d638 elongation at yield 9 % 527 modulus of elasticity in tension mpa 527d638 modulus of elasticity in flexure 1400 mpa 178d 790. It is also harder and more opaque and can withstand somewhat higher temperatures 120 c248 f for short periods. Pdf polyblend films were prepared from highdensity polyethylene hdpe and polyllactic acid plla up to 20% plla by the melt. Composites of highdensity polyethylene in pellet form hdpe, 25% by weight of pw, and either 0% or 5% by. Polyethylene is a member of the important family of polyolefin resins.
Pdf mechanical properties of filled high density polyethylene. Conversely, resins with a relatively high molecular weight will yield a lower melt index. Liu honeywell center of excellence in computeraided design, department of chemical engineering, virginia polytechnic institute and state university, blacksburg, virginia 24061 sundaram ramanathan, simon lingard, and chauchyun chen. Mechanical properties of high density polyethylenecarbon. Benefits of high density polyethylene hdpe clean it up. High density polyethylene, often abbreviated to hdpe, is a polymer whose monomer is ethylene.
Better resistance to uv degradation than unmodified hdpe, however slightly more expensive then unmodified hdpe. Lowdensity polyethylene ldpe is a thermoplastic made from the monomer ethylene. Tipelin is the registered trade mark for medium and high density polyethylene grades manufactured by mol petrochemicals co. Hdpe high density polyethylene after its experimental preparation in the 1930s, the application in high frequency radar cables during world war ii, gave impetus to its commercial production. Highdensity polyethylene hdpe labware thermo fisher.
Linear low density polyethylene lldpe is very comparable to ldpe, with the added advantage of being altered by adjusting the formula constituents and using less energy during production. It can be cut with a carbidetipped saw blade and drilled with regular metal bits. If you look at this plastic under a microscope, you would see that it has a linear structure with few branches lending to its optimal strength density ratio. The process and the properties of the materials make all the difference, however, the proof is most evident in the quality of the end product. Select a product number from the table below to view a product data sheet for these materials using polyethylene as the base resin 799x numbered products are our proprietary formulations. Data sheets for these products are generally not available on our website. Mechanical properties of high density polyethylenemodified. Physical property data for hdpe polyethylene pipe table 2 for data, sizes, or classes not re.
Mol petrochemicals unimodal medium and high density tipelin grades mdpe and hdpe are produced by continuous suspension polymerization using low pressure catalytic process under licence of phillips petroleum co. High flow properties, good rigidity housewares, thin walled drinking cupsglasses, toys, buckets m5220 g 952 21. Highdensity polyethylene, unlike polypropylene, cannot withstand normally required autoclaving conditions. Hdpe is a very versatile plastic that has a wide range of applications from pipes to storage bottles. Insert a copy of the cad physical property values into your engineering notebook adjacent to the sketch. The latter, were achieved through the injection molding of high density polyethylene hdpe reinforced with specific volume fraction of cnts.
The filler varied from 5% to 25% by weight in the composite. With a high strengthtodensity ratio, hdpe is used in the production of plastic bottles, corrosionresistant piping, geomembranes and plastic lumber. This thermoplastic is available in a range of flexibilities depending on the production process. The mechanical properties change drastically when comparing highdensity polyethylene to low density polyethylene. High density polyethylene is also commonly used for. It was the first grade of polyethylene, produced in 1933 by imperial chemical industries ici using a high pressure process via free radical polymerization. Electrical properties of polyolefins poly olefin structure and dielectric behavior dielectric constant can be expressed for these nearly nonpolar polymers by an expression of the form.
Highdensity polyethylene or hdpe is a commonly used petroleum thermoplastic and the most used of the three polyethylenes for a wide range of applications. If you look at this plastic under a microscope, you would see that it has a linear structure with few branches lending to its optimal strengthdensity ratio. Poylpropylene and highdensity polyethylene national. It is the most widely used plastic in the world, being made into products ranging from clear food wrap and shopping bags to detergent bottles and fuel tanks. Conclusion the toughness of the composites resulted from the strong interfacial adhesion between elastomer contribute and high density polyethylene matrixthe wear loss of hdpe and its composites with. The following serves to outline the benefits of high density polyethylene hdpe. High density polyethylene hdpe storm and tornado shelters. Relative advantages, disadvantages and applications are listed together with a table of typical properties for this thermoplastic. Effect of bismuth filler on mechanical and electrical properties of high density polyethylene hdpe is described in this study. Highdensity polyethylene pipe hdpe can carry potable water, wastewater, slurries, chemicals, hazardeous wastes, and compressed gases. Polyethylene, light, versatile synthetic resin made from the polymerization of ethylene. In 1951, while attempting to convert propylene into gasoline, j. Engineering properties of polyethylene 3 weight will have a comparatively high melt index. High tensile properties low sagging grade long term hydrostatic strength excellent stress cracking resistance.
The process and the properties of the materials make all the difference, however, the. For example, high density polyethylene is more crystalline than low density polyethylene because it contains fewer branches. It is lighter than water, easily withstands exposure to a wide variety of common lab chemicals, and has a milky white translucent appearance. Bl5400 high density polyethylene general information. Typical engineering properties of high density polyethylene.
Thus obtained hdpecs composites were characterized by the thermal analyses. The properties of hdpe include three common variations. Pdf mechanical properties of high density polyethylenemodified. Effects of microstructure on creep characteristics by. Mechanical and chemical properties of high density polyethylene. Hdpe composites with different weight percentage of bismuth 0%, 10. Ldpe is also frequently used in comsumer packaging, bags, bottles, and liners. Obvious improvement in the mechanical parameters was recorded depending on the filler type and mesh size. Product safety assessment high density polyethylene hdpe.
History and physical chemistry of hdpe atoms, and consequently, the greater the molecular weight. High density polyethylene, as the name suggests, has a higher specific density than low density polyethylene, though this difference is only marginal. It was found that the incorporation of the calcium silicate into high density polyethylene resulted in a slight increase in the yield stress 6. Among the factors controlling the physical properties of hdpe are mfr, density, molecular weight, molecular weight distribution, crystallinity, double bonds, branched species, etc. Product data quality commitment resilience innovation smooth hdpe material information test value properties testing frequency minimum test method 100 mils 120 mils thickness min. In this interview, david nackashi, ceo at protochips, inc talks to azom about their new product axon and how it. Other common polyethylene pe materials are mediumdensity polyethylene mdpe.
Mechanical properties of high density polyethylenechromium trioxide under ultraviolet rays. It is sometimes called alkathene or polythene when used for hdpe pipes. Ignition temperature cloud 790 f 420 c minimum radiant flux for ignition 20 kwm2. Microsoft word ineos engineering properties of hdpe. The mechanical properties change drastically when comparing high density polyethylene to low density polyethylene.
Properties of high density polyethylene hdpe astm or ul test property hdpe d792 density lbin. Jul 25, 2012 high density polyethylene, usually shortened to hdpe or pehd, is a plastic polymer with flexible properties that make it ideal for a wide range of applications. The material cannot be cemented, but it is easily welded with a plastic welder. Steadystate and dynamic modeling of commercial slurry. This discovery led to the development of a new catalytic process. Properties and applications of hdpe or high density. Paulownia wood pw flour was evaluated as a reinforcement for thermoplastic composites. Select a product number from the table below to view a product data sheet for these materials using polyethylene as the base resin. Lowdensity polyethylene ldpe is a highly flexible material with unique flow properties, making it great for plastic film applications such as shopping bags. Pdf properties of high density polyethylene paulownia. When you have completed the physical property analysis, answer the questions below. Isometric drawing of high density polyethylene object using a 1 cm grid 1.
History and physical chemistry of hdpe plastics pipe. This sheet can be heat formed, shaped, and welded to fabricate ducts, hoods, and much more. The molecular weight, the molecular weight distribution and the amount of branching determine many of the mechanical and chemical properties of the end product. High density polyethylene hdpe compounds rtp company. High density polyethylene structure, properties, and uses.
Physical chemistry and mechanical properties of hdpe. Thermoplastic high density polyethylene hdpe substech. Highdensity polyethylene hdpe or polyethylene highdensity pehd is a thermoplastic polymer produced from the monomer ethylene. Two different products a and b were manufactured under the same reference in an interval of six years and supplied in sheets extrusion process. Highdensity polyethylene hdpe tubing from coleparmer. Environmental stress cracking esc can result in catastrophic failure of polyethylene. Material safety data sheet high density polyethylene hdpe. Material safety data sheet high density polyethylene hdpe 1.
In general, the degree of branching in polyethylene determines its mechanical properties. Advantages of using polyethylene for large plastic products. For example, highdensity polyethylene is more crystalline than lowdensity polyethylene because it contains fewer branches. For more specific values, follow the links immediately below.
Polyethylene is available in a number of grades according to its molecular weight. It has a high degree of short and long chain branching, which means that the chains do not pack into the crystal structure as well. From this relationship, we can associate changes in physical properties as shown in table 11 with changes in melt index of the material. It is a thermoplastic with a very high strength to density ratio. Density mechanical tensile stress yield tensile strain break flexural modulus impact notched izod impact strength 23. Low density polyethylene ldpe is a highly flexible material with unique flow properties, making it great for plastic film applications such as shopping bags. Mechanical properties of high density polyethylenemodified calcium silicate composites article pdf available in silicon 63. Our specialists are here to help you find the best product or part available for your application. The difference in strength exceeds the difference in density, giving hdpe a higher specific strength. May 11, 2001 better resistance to uv degradation than unmodified hdpe, however slightly more expensive then unmodified hdpe. It has been used in recent years for garden furniture as it resists the weather and can be cleaned very easily. High density polyethylene hdpe resins are polymers of ethylene or copolymers of ethylene. High density polyethylene pipe hdpe can carry potable water, wastewater, slurries, chemicals, hazardeous wastes, and compressed gases.
The material tested in this work is hdpe high density polyethylene, grade 500 natural produced by rochling engineering plastics kg. The versatility of polyethylene has made it one of the worlds most popular plastics. Linear lowdensity polyethylene lldpe is very comparable to ldpe, with the added advantage of being altered by adjusting the formula constituents and using less energy during production. Highdensity polyethylene black gas 5 physical properties table 2 lists general physical properties of jm eagle highdensity polyethylene pipe. This discovery led to the development of a new catalytic process for the making of high density polyethylene. It has the lowest repair frequency per mile of pipe per year. Pdf high density polyethylene hdpecalcium silicate cs composites containing vinyltriethoxysilane treated calcium silicate contents varying from. Thermoplastic polyethylene terephtalate pet thermoplastic polyamide nylon 6 thermoplastic polyimide pi. A considerable improvement on mechanical properties of the material can be observed when the volume fraction of cnt is increased. The high density polyethylene composite with recycled.
Pdf mechanical and morphological properties of high density. Hdpe is used to make bottles for fruit juice, milk, water, kitchen cleansing products and even furniture. Mechanical properties of filled high density polyethylene. Hdpe high density polyethylene polyethylene is a low cost, chemically resistant plastic material that can be used for a wide variety of applications. Mechanical properties of high density polyethylenechromium. High density polyethylene hdpe sheet this sheet can be heat formed, shaped, and welded to fabricate ducts, hoods, and much more. Blends of acrylonitrile butadiene rubberhigh density polyethylene. Like all polyolefins, hdpe is nontoxic, noncontaminating, and exhibits a high degree of break resistance. Semantic scholar extracted view of mechanical and chemical properties of high density polyethylene. All of our in ground flatsafe tornado shelters come with our patented. Banks of phillips petroleum company discovered polypropylene, a high melting crystalline aliphatic hydrocarbon. In the uk, for example, around four billion hdpe milk bottles are produced and purchased each year.
High density polyethylene or hdpe is a commonly used petroleum thermoplastic and the most used of the three polyethylenes for a wide range of applications. Pdf mechanical properties of high density polyethylene. Properties and applications of hdpe or high density polyethylene. Blend compatibilization nbr hdpe mechanical properties. Bl5400 high density polyethylene general information properties1 physical test method nominal values melt flow index 190. The nominal properties reported herein are typical of the product of capc but do not reflect normal testing variance and therefore should not to be construed as specifications. Effects of microstructure on creep characteristics by joy j. Product safety assessment high density polyethylene hdpe resins select a topic. Mechanical properties of high density polyethylene. But the three basic physical properties factors that regulate physical properties are molecular weight, molecular weight distribution and density. Mechanical properties of hdpe m624 with three filler inorganic and organic composites were assessed with respect to the effect of the filler content.
943 1149 624 1085 1500 248 774 1379 564 1375 1308 894 163 1614 1547 1048 542 1478 659 816 629 1007 439 492 47 474 503 1233 643 939 1432 659 1037 213 14 993 603 809 407 27 1065