specific gravity of plastics chart

Density of Plastics: Technical Properties. Density measures the mass per unit volume. It is calculated by dividing the mass of the material by the volume and is normally expressed in g/cm 3. The density of a plastic sample may change due to change in crystallinity, loss of plasticizers, absorption of solvent, etc. Acrylic sheeting, commonly referred to as plexiglass sheeting, is the most common alternative to traditional glass. | Contact, Home Fun fact: because it is VERY resistant to fatigue, PP is usually used for living hinges (the thin piece ofplastic that allows a part of a product to fold or bend from 1 to 180 degrees). HVAC Systems Calcs 0000002953 00000 n Animals do not recognize it as artificial and may mistake it for food causing serious effects on the health of birds or marine animals that might swallow it. The difference of Density & Specific Gravity. The tests for density and SG are particularly significant in the custom sheet industry because plastic sheet is sold on a cost per pound basis. Polysulphone 1.24 0000170169 00000 n Minerals and other Materials - Specific Gravities Specific gravities for minerals and other materials. Structural Shapes Sg = Specific Gravity of the substance Specific gravity of a material can be calculated by following equation: The testing method of SG for plastic systems is ASTM D792 and ISO 1183. SG of plastic is less compared to other materials influence its price; thus all plastic materials are sold on cost per weight basis. HWM7W=T+[h#E\Zc"YLGr>ZH ps = density of the fluid or substance (kg/m3) Fluid. This test is often seen with the designation ASTM D792. WebThough some manufacturers use grams per cubic centimeter to indicate the weight of their products, others merely provide the specific gravity of their material. The standard test method for the determination of density and specific gravity When the plastic that expanded beyond the container is removed we now find that the remaining cube of heated plastic inside the container weighs only 0.933 grams. 3t6/8lM2-lA It has a durometer of 50 D, a tensile strength of 1600 PSI, a brittleness temperature of -76F, a specific gravity of .921, and an elongation at break. ,unv . 0000005721 00000 n Specific gravity and density are especially relevant because plastic is sold on a cost per pound basis and a lower density or specific 1, Zhongshan Rd., Dacun Township, Changhua County 515, Taiwan (R.O.C. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected. Polyvinyl acetate 1.19 Learn More, Formally confirming that your products and services meet all trusted external and internal standards. Each one is different from the other and has different uses. Polybutene 0.91-0.92 Styrene-butadiene 0.93 respect to the website or the information, products, services, or related graphics contained on the website for any purpose. Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Portions throughout the same sample may also differ in density due to differences in crystallinity, thermal history, porosity, or changes to the material composition, such as the addition of a filler or pigment. 0000157774 00000 n Hardware, Imperial, Inch CONSTITUTION: An isotactic polyolefin powder or particle of an average particle Acrylic doesn't have as much impact resistance as polycarbonate; polycarbonate's tensile strength is greater than that of PVC; PVC's heat deflection abilities are lesser than Vivak's; and so on, and so on. Gravity: Viscosity CPS 0000006910 00000 n (You will help other colleagues find this blog). LLDPE 0.91-0.94 Vibration Engineering 0000148052 00000 n Other custom sizes of trays, special partitions, flanges, outlets, etc. Physicists use 39.2 F (4 C) as the standard, but engineers ordinarily use 60 F. In the International System of Units (SI Units), the density of water is 1.00 g/cm3 at the standard temperature. xb```f`g`g`0cb@ !V6C'``D&yY(J-Ftt@UJ `H Dvp48(kha``aAA8koxD(lb'ftb~ef.aS-`0`"#a(1&' .8ffgS D!f' 0000130285 00000 n WebPURPOSE: The title filler having a low specific gravity and excellent affinity for plastics and retention of electric conductivity, prepared by applying a metallic coating to the surface of an isotactic polyolefin powder or particle etched in the presence of a specified chemical agent. 0000004927 00000 n 0000155825 00000 n ), Copyright 2000 - 0000174998 00000 n Manufacturing Processes 0000007137 00000 n Despite its many advantages and efforts made by the plastic industry to increase its reusability, PVC is still hardly recyclable and should therefore be avoided, whenever possible. 9;-h3UR{SD bD=NSH3)0lefD}n 81 c+0!o XFu#N/? First, we have to know that the formula of density is: As formula shown, density is total mass of the object divided by total volume of object, which means: 1 gram per cubic centimetre or 1 kilogram per cubic metre.Density of water is1 gram per cubic centimeter (1 g/cm3), but actually, the exact density of water is not really 1 g/cm3, but rather a bit less (very, very little less) than 1, so we can say thatgenerally the weight and volume of water is the same.What's the meaning of "Specific Gravity"?Specific Gravity means specific value of an object undernormal temperature and pressure.

Vivak Sheet has become a staple in the point-of-purchase industry due to its economic advantages compared to polycarbonate and superior impact strength over acrylic. 0000151915 00000 n 0000159988 00000 n 0000004265 00000 n Description: This 3/8" OD x .062" Wall Yellow Polyethylene Tubing has a working pressure of 120 PSI @ 72F. Heres a brief recap of what we have learned so far: We hope this blog post has provided some clarity about the differences among all these plastic types. 0000167357 00000 n It is a very inexpensive resin per unit weight and easy to create, for these reasons it can be found everywhere: from beverage cups, insulation, packing materials to egg cartons and disposable dinnerware. The specific gravity of plastic is the ratio of the density of plastic to that of a reference substance (Usually water). The American Society for Testing and Materials (ASTM) is an organization that defines and sets standards to ensure good quality and workmanship. Specific GravityDensity and specific gravity sound quite similar, some even say that they are synonyms; however, they are actually not the same, below we are going to introduce the differences of them.What's the meaning of "Density"?Density ismass or weight of a substance per unit volumeundernormal temperature and pressure. 0000173123 00000 n And The SI unit is Kg/m3. WebSince the density of a fluid varies with temperature, specific gravities must be determined and specified at particular temperatures. Lubrication Data Apps The member-related functions have been closed due to the deactivation of cookies. For convenience's sake, we have converted the specific gravities provided by the manufacturers of our products to grams per cubic centimeters. Mass Versus 0000002775 00000 n How about an incentive to share this post? WebMinerals and other Materials - Specific Gravities Specific gravities for minerals and other materials. Specific gravity (S.G.) is a measure of the relative density of a substance as compared to the density of water at a standard temperature. It is 250 times stronger and just as clear as glass. Finish: Solid. 0000117718 00000 n Ethylene-propylene 0.86 Plastic (CR-39) and Crown Glass are considered base index with indices of 1.498 and 1.52 respectively. Specific gravity, This website uses cookies to collect necessary user browsing behaviors so that we can provide you with a better browsing experience. Roto-molded LLDPE with thick walls for superior strength anddurability. Polypropylene is the second-most widely producedcommodity plastic and its market is forecasted to grow even more in the following years. From here density and SG are calculated using the following formulas: Specific Gravity = (Weight A / Weight B)Density = (Weight A / Weight B) * 0.9976 g/cm3 , where 0.9976 g/cm3 is equal to the density of distilled water at 23C. WebSpecific Gravity (SG) is defined as the ratio of density of the material to the density of water (1 g/cm3) at a specified temperature. Because of this difference, when comparing polypropylene sheet to PET sheet, holding constant gauge and size, customers can see approximately a 30% density reduction from PET to PP and an increased yield on pounds purchased. AddThis use cookies for handling links to social media. In its rigid form, PVC is largely used in the building and construction industry to produce door and window profiles and pipes (drinking and wastewater). 0000169321 00000 n The information contained in this article is for general information purposes only. 0000154762 00000 n This may also be referred to as relative density. Spring Design Apps Civil Engineering Bad0Ai2qe5a>/=Amk.uB^Hfd]hG!+lqqTDlz!" 0000164707 00000 n The most widely used member of the vinyl family, PVC is excellent when used for corrosion-resistant tanks, ducts, fume hoods and pipe. For PS the melt density is 0.945 g/cm 3 and for PP it is about 0.74 g/cm 3. 0000139528 00000 n 0000131261 00000 n 0000124088 00000 n The information is provided by SPECIFIC GRAVITY- The ratio of the weight of the molded piece as compared to the weight of an equal volume of water ASTM D792. United States Plastic Corp. and while we endeavor to keep the information up to date and correct, we make no representations or 10XX,52,11XX,17,12XX,7,13XX,4,15XX,16,3XXX,2,40XX,10,41XX,12,43XX,5,44XX,4,46XX,5,47XX,3,48XX,3,5XXX,23,6XXX,3,71XX,1,8XXX,22,92XX,5,93XX,1,94XX,4,98XX,2,AISI,66,ASTM,172,Atomic-Mass,327,Atomic-Number,436,Atomic-Radius,86,Atomic-Symbol,329,Atomic-Volume,94,Austenitic,56,Boiling-Point,94,bp1,97,CBS,6,Chemical-Elements,100,Chemical-Symbol,217,CMDS,13,Coefficient-of-Thermal-Expansion,85,Covalent-Radius,87,Crystal-Structure,109,CS,17,CVS,3,Density,297,Duplex,6,el1,100,Elastic-Modulus,30,Electrical-Conductivity,79,Electro-Affinity,87,Electron-Configuration,109,Electronegativity,102,Electrons-per-Shell,111,Enthalpy-of-Fusion,93,Enthalpy-of-Vaporization,95,Ferritic,12,fp1,38,fs1,45,Group-Number,218,HCS,14,Heat-of-Fusion,87,Heat-of-Vaporization,85,HMCS,16,Ionic-Radius,78,Ionization-Energy,102,Ionization-Potential,101,l1,438,LCS,21,List,281,lp1,69,Martensitic,6,MCS,17,MDS,14,Melting-Point,96,mm1,2,mp1,99,MS,4,NCMDBS,6,NCMDS,31,NCS,2,NMDS,8,Oxidation-States,104,p1,44,Period-Number,107,pr1,53,Properties,40,RCLS,1,RCS,16,ref1,5,RRCLS,3,RRCS,4,SAE,201,Site,2,SMS,5,Specific-Gravity,83,Specific-Heat,92,Specific-Weight,1,SS,80,Tests,2,Thermal-Conductivity,105,tm1,274,Valence-Electrons,98,wt1,26, Materials: 2022: Specific Gravity of Plastic (& Formula, Definition, Infographic), 2022: Specific Gravity of Plastic (& Formula, Definition, Infographic), https://1.bp.blogspot.com/-qPMKZ48g6Vg/XRPSAE54r4I/AAAAAAAAOsY/VpY75KLZ6O4JJdZeUM1jyrM_g0N8xDB3QCLcBGAs/s320/specific-gravity-of%2Bplastic.webp, https://1.bp.blogspot.com/-qPMKZ48g6Vg/XRPSAE54r4I/AAAAAAAAOsY/VpY75KLZ6O4JJdZeUM1jyrM_g0N8xDB3QCLcBGAs/s72-c/specific-gravity-of%2Bplastic.webp, https://materials.gelsonluz.com/2019/07/specific-gravity-of-plastic-formula.html, Not found any post match with your request, STEP 2: Click the link on your social network, Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy, CBSE Class 10 Chemistry Chapter 2 Important Questions and Answers. Example: A gallon of oil weighs 9.5 lbs per gallon9.5 lbs / 8 = 1.187 specific gravity. The specific gravity of a substance is a comparison of its density to that of water. 0000142018 00000 n The purpose was to provide a consistent national system to facilitate recycling of post-consumer plastics." +74|=8/[ dcepJ@@ Q endstream endobj 8 0 obj<> endobj 10 0 obj<> endobj 11 0 obj<>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI]>> endobj 12 0 obj[278 750 474 750 750 750 750 238 750 750 750 750 278 750 278 278 556 556 556 556 556 750 750 750 556 750 750 750 750 750 750 611 750 722 750 722 722 667 611 778 722 278 750 750 750 750 722 778 667 750 722 667 611 750 667 944 750 667 750 750 750 750 750 750 750 556 611 556 750 556 333 611 750 278 750 750 278 750 611 611 611 750 389 556 333 611 556 750 556 556] endobj 13 0 obj<> endobj 14 0 obj<> endobj 15 0 obj<> endobj 16 0 obj<> endobj 17 0 obj<> endobj 18 0 obj[/ICCBased 39 0 R] endobj 19 0 obj[278 750 355 750 750 750 750 191 333 333 389 750 278 333 278 278 556 556 556 556 556 556 556 556 556 556 278 750 750 584 750 556 750 667 667 722 722 667 611 750 722 278 750 667 556 833 722 778 667 750 722 667 611 722 667 944 750 750 750 750 750 750 750 750 750 556 556 500 556 556 278 556 556 222 222 500 222 833 556 556 556 556 333 500 278 556 500 722 500 500] endobj 20 0 obj<> endobj 21 0 obj<> endobj 22 0 obj[278 750 750 750 750 750 750 750 333 333 750 750 750 750 278 278 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 722 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 750 556 750 500 556 556 278 556 556 222 750 750 222 833 556 556 556 750 333 500 278 556 500 750 750 500] endobj 23 0 obj[250 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 500 500 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 667 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 722 778 778 778 778 778 778 778 444 500 444 500 444 778 778 778 278 778 778 278 778 500 500 778 778 333 389 278 778 500] endobj 24 0 obj<> endobj 25 0 obj<> endobj 26 0 obj<>stream 0000014816 00000 n Economics Engineering 0000004768 00000 n 0000163869 00000 n Specific . In recent years, the use of these resins has been controversial: the basis of this controversy is their leaching that, occurring at high temperature, releasesbisphenol A, a compound that is on the list of potential environmental hazardous chemicals. 0000002716 00000 n Polyacronitrile 1.17 0000102892 00000 n Polybutylene 0.60 0000003888 00000 n Thermodynamics Thermodynamics Directory | Heat Transfer Directory, Specific Gravity Table Chart and Equation. Polyamide Density in plastics is the measurement of mass per unit volume. Pressure Vessel Plastic Material: Density & Specific Gravity PA66, 1.13 - 1.15 PA66 + 30% GF, 1.37 PA66 + 30% MF, 1.35 - 1.38 PA66 IM, 1.05 - 1.10. 0000015222 00000 n Contrary to HDPE, LDPE is characterized by low-density molecules, giving this resin a thinner and more flexible design. Specific Gravity = (Weight A / Weight B) Density = (Weight A / Weight B) * 0.9976 g/cm3 Yield point is the first point where the specimen yields, where the specimen's cross-sectional area begins to contract significantly, or where the strain can increase without increase in the stress. Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! Polypropylene 0.90-0.92 So youve narrowed down what material you need thanks to our Learn More About your Plastic Sheet series - now its time to download a data sheet and take a look at the performance attributes of our materials. Welding Stress Calculations Electronics Instrumentation However, various factors can affect density such as crystallinity, loss of plasticizer or absorption of solvent. Typical properties of some common thermoplastics: For full table with Thermal Conductivity, Specific Heat and Maximum Temperature Limit - rotate the screen! %PDF-1.4 % General Fax: 860-963-1998, Understanding Your Data Sheet: Density & Specific Gravity, So youve narrowed down what material you need thanks to our. 0000149962 00000 n **Ji-Horng Plastic is a leading plastic injection molding manufacturer since 1986, for more information, please contact us!**. Polytetrafluorethylene 2.27, Working Days & hours Details for Alfa Plast Mould, Alfa Plast Mould 2008 | All Rights Reserved. Because its made with long unbranched polymer chains its much stronger and thicker than PET. This bucket is economically priced, while still featuring premium bucket quality and durability. Its usually picked up through most curbside recycling programs and has a tremendously positive track record! Since then, after undergoing some minor variations, the RIC has been recognized as the worldwide standard plastic classification. In 1988, the Society of the Plastics Industry introduced the Resin Identification Code (RIC) system which divided plastic resins into 7 different categories. Urine normally has a specific gravity between 1.003 and 1.035. 0000129490 00000 n Feedback Advertising The weight will appear in both metric and common US units. 0000072608 00000 n 0000173991 00000 n This changes the ratio for our calculation; it is now 0.945/0.74 or 1.28. 2023, by Engineers Edge, LLC www.engineersedge.com 0000127802 00000 n Web1 28768 DENSITY OF PLASTICS What is Density of plastic: The density of a substances is generally known as mass per unit volume. That value must be known in order to determine the overall weight of said project and whether its other components will be able to support the heft of the plastic component - which is why we've put together this quick and easy guide on the weights of some of our most popular plastics. can be special ordered. These applications will - due to browser restrictions - send data between your browser and our server. 0000158889 00000 n WebSpecific Gravity - SG - Tensile Yield Strength - y-(10 3 psi) Tensile Modulus - E - (10 3 psi) Coefficient of Linear Expansion - - (10-6 in/in o F) Thermal Conductivity - k - (Btu in 0000008409 00000 n PA-11 1.04 Specific gravity and density are especially relevant because plastic is sold on a cost per pound basis and a lower density or specific gravity means more material per pound or varied part weight. There are two basic test procedures- Method A and Method B. The more common being Method A, can be used with sheet, rod, tube and molded articles. 0000160831 00000 n These Thermo Scientific Nalgene bottles are lightweight versions of lab-quality bottles and can perform light-duty, general purpose work. 0000151051 00000 n 0000136804 00000 n WebDensity of Plastics Material: Technical Properties Table. SPECIFIC GRAVITY- The ratio of the weight of the molded piece as compared to the weight of an equal volume of water These specialty materials have densities of up to 15 g/cc yet still have the moldability of plastics. The lower the density or SG of a particular material, the more material per pound or surface area you will get. WebSimply enter the density of the material in which your are interested, select the shape from the drop-down list, enter the dimensions, then hit the Calculate button. Electric Motor Alternators Our network of more than 1,000 laboratories and offices in more than 100 countries, delivers innovative and bespoke Assurance, Testing, Inspection and Certification solutions for our customers' operations and supply chains. WebSpecific gravity is the (unit less) ratio of the solid wood density to the density of water at the same temperature. Should reactivate cookies? 0000138434 00000 n 0000142860 00000 n In order to help you make better-informed decisions about the products that you buy, today we will go through the seven different types of plastic, how they differ, and their impact on the environment. Web most plastic baby bottles 5-gallon water bottles sport water bottles metal food can liners clear plastic sippy cups some clear plastic cutlery Mixed resin plastics like #7 are difficult, if not impossible, to recycle. Pumps Applications Also, it is relatively hard and resistant to impact and can be subjected to temperatures of up to 120 C without being affected. Some of our calculators and applications let you save application data to your local computer. Our Polycarbonate sheet offers a levelof safety that no other clear glazing material can match. HDPE 0.96-0.97 It comes in two basic forms: rigid and flexible. 0000128624 00000 n Physics Mechanical Tolerances Specs This information can be used to tell whether plastic 0000140352 00000 n ~P2p@0$:+mbsuz! S g = p s /p h20 S g = Specific Gravity of the Natural rubber 0.91 This site requires JavaScript to function. Butyl rubber 0.92 Engineering Mathematics 0000004435 00000 n used for pressurized water systems - sprinkler.. highly resistant to acids, bases and many solvents, resistant to a variety of acids and bases, may be damaged by some solvents and chlorinated hydrocarbons, usable for water, gas and drainage systems, similar to PVC - but designed for water up to, resistant to abrasion, acids, bases, solvents and much more. For example, The American Society for Testing and Materials (ASTM), approximately a 30% density reduction from PET to PP and an increased yield on pounds purchased. In 1988, theSociety of the Plastics Industryintroduced the Resin Identification Code (RIC) system which divided plastic resins into 7 different categories. Method A is the more common test method used, and can be performed with sheet, rod, tube and molded pieces of plastic materials that are not affected by water. 0000134268 00000 n This broad range of flexible Tygon tubing products are engineered to meet many user specifications including chemical resistance, fluctuations in temperature, abrasion, high purity and long servicelife. Machine Design Apps 0000009713 00000 n Polyvinyl chlorideis the world's third-most widely produced syntheticplasticpolymer. More frequently, however, anything over 1.53 is called high-index. I'm Gelson Luz, mechanical engineer, welding specialist and passionate about: I am building this blog to be the best learning blog about engineering! Section Properties Apps 1 cm3 water weighs 1 g (as mentioned, density of water is 1g/cm3), and 1cm3 aluminum weighs 2.7 g (the density is 2.7 g/cm3), thus specific gravity of aluminum is 2.7 1 = 2.7 (which has the same value with density), **Tip: To look it up efficiently, mobile phone viewer, please use site searching, computer viewer, please use "Ctrl + F"**, Remarks: Glass Fiber (GF), Carbon Fiber (CF), Mineral Fiber (MF), Impact Modified (IM), Low Friction (LF), Talc Filled (TF), Ultra High Molecular Weight Polyethylene (UHMWPE), Crosslinked Polyethylene (XLPE), Density of Chemical Additives forInjection Molding. 0000156682 00000 n 0000050964 00000 n If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. Videos Design Manufacture Specially designed for marine applications, antiskid HDPE sheeting offers superior durability with the additional benefit of a non-skid surface perfect for high-traffic marine surfaces. Viscosity Chart. Join our movement of Global Change Agents to receive exclusive invitations and updates. Only emails and answers are saved in our archive. 0000153750 00000 n Continue reading to learn more! Hardware, Metric, ISO 0000124314 00000 n 0000006323 00000 n Excel App. 0000005504 00000 n Therefore, the specific gravity (which is dimensionless) for a liquid has the same numerical value as its density in units of g/cm3. Whether your business is local or global, we can help to ensure that your products meet quality, health, environmental, safety, and social accountability standards for virtually any market around the world. If you are interested in knowing more about what we do, click here. 6I&dsV.G{w+Z#Ot>wY[~JKWr#oyOIIl(RV[U|i:n0qfB#}CNs,%|PEyeTeB Put theplastic specific gravityin perspective! Therefore, the specific gravity is a unitless number. Helium gas has a density of 0.164g/liter It is 0.139 times as dense as air . Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! Though that may seem like a simple and not particularly worthwhile distinction, any engineer worth their salt will tell you that weight is of the utmost importance when deciding whether a material is appropriate for a particular project. Polystyrene is the sixth type of plastic on the list and it can be solid or foamed. Learn More, Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. Hard and sturdy, it can withstand high temperatures and is found in tupperwares, car parts, thermal vests, yogurt containers, and even disposable diapers. Polyethylene Polymers typically have a benchmark density that can offer an approximate value of what the density of a particular material can be expected to be. WebDensity of Plastics Density is calculated by dividing the mass of the material by the volume and is normally expressed in g/cm3. WebMaterial density g/cc 1 g/cc = material density = specific gravity Therefore, knowing the specific gravity and with the help of the handy conversion table on the shared drive one A Specific Gravity of less than 1 means that the 0000152962 00000 n ?b0/7>41"FUm'V69mjqQn[pd@,XrKC^k $e-eI]abs6QCoq$Y+4Gb=.bsm?JBny!Q.h38'!xSi{C ,*+R9hHz 0000176664 00000 n So, keep reading! 0000165724 00000 n Note: Both densities need to be in the same unit as they will cancel each other and produce SG. Though some manufacturers use grams per cubic centimeter to indicate the weight of their products, others merely provide the specific gravity of their material.

Expanded PVC sheet plastic is the ideal material where durable construction materials are needed. Heat Transfer resistant to a variety of bases and acids, some solvents and chlorinated hydrocarbons may damage the material, common as DEV - Drainage, Waste and Vent - pipes, only compression and banded type joints used. For example, some types of plastic are reusable and others arent because of the chemicals they contain; some can be recycled and others need to be disposed of in a different way. The tests for density and SG are particularly significant in the custom sheet industry because plastic sheet is sold on a cost per pound basis. It has the simplest structure of all the plastics, making it easy and cheap to produce. We don't collect information from our users. We carry carry hose barb fittings in a variety of materials suitable for all sorts of applications. 0000124825 00000 n Gears Design Engineering 1 gallon of water weighs 8.33 lbs. Specific gravity, generally speaking, measures the density of an object as compared to water. But they can also be found on mobile phones and, more frequently, in compact-discs (CD). 0000166558 00000 n 7 0 obj<> endobj xref 7 103 0000000016 00000 n Cleaning & Industrial U.S. Polystyrene 1.05 When mixed with other substances, It can be made softer and more flexible and applied to plumbing, wiring, and electrical cable insulation and flooring. Environmentally-speaking its among the worst types of plastic: first, it is regarded as notbiodegradable. Therefore, for the same 1cm volume, the melted plastic weighs less than the solid plastic (0.933 g/cm vs. 1.054 g/cm). The lower the density or SG of a particular material, the more material per pound or surface area you will get. As usual, remember to opt for reusable alternatives to plastic, to avoid purchasing the dangerous types and recycle as much as possible the types of plastic that you can! 0000018128 00000 n In fact, not only can plastic be found in a variety of different shapes and colors, but also in many different types. trailer <<76879325294511da977e001124da1668>]>> startxref 0 %%EOF 9 0 obj<>stream On top of this, plastics number 7 is almost never recycled. One of the most basic differences between varieties, however, can be found in how much they weigh. Please read AddThis Privacy for more information. Second, polystyrene foam blows in the wind and floats on water, due to its low specific gravity. Friction Formulas Apps Polyethylene terephtalate 1.34-1.39 0000137613 00000 n in various applications. Learn More, Validating the specifications, value and safety of your raw materials, products and assets. View Cart. Engineering Calculators Over 12,000 ASTM standards operate globally, including tests specific to plastics, to help consumers have confidence that the products they purchase will perform as expected. Polycarbonate 1.2 0000005946 00000 n Hydraulics Pneumatics Some elements may not work properly.

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