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Dynamic compression tests were conducted on cubic specimens of EPS foam with side length of 25mm (Figure 1). About Insulfoam – Leader in EPS Insulation. EPS board produced to meet the requirement of Type I EPS has been tested and found to fall within 10 to 14 psi. The mechanical properties of molded EPS depend largely on density. NEW- Surfblanks Lite EPS; Custom Rockers; Rocker Charts Download White foam is available in any thickness up to 8 inches in 1#, 1.5# or 2# density. Expanded Polystyrene (EPS) is the generic industry name used for white rigid material made from the expanded polystyrene beads. The density of EPS is low compared to water, with a normal density range of 11 to 32 kg/m3 compared to water at 100 kg/m3. In Imperial or US customary measurement system, the density is equal to 3.1 pound per cubic foot [lb/ft³], or 0.029 ounce per cubic inch [oz/inch³]. Less-expensive EPS—typically sold at home improvement warehouse stores—is 0.4 kg (1 lb) density per 0.02 m 3 (1 cf), appropriately called Type-I density EPS. Styrene Products, Inc. expanded polystyrene (EPS) rigid board foam plastic is for all types of industrial, packaging, and con-struction uses. Expanded polystyrene foam (EPS) produced by EUMEPS members. Home » Forum » General Discussion. However, one of the most confusing things about foam is the relationship between these characteristics. Team; Industry News; Contact Us; Shipping and Returns; FAQ; Cart ($0.00) DOWNLOAD DENSITY CHART PDF. Virgin EPS; I-Foam; Stringers +-Poplar Ply; Appelcore; Bamboo; Bass; High Density; Services +-CNC Cutting; 3D Scanning ; Recycling; Deliveries; Where To Buy +-Shapers Who Use Marko; Distributors; About Us +-Why Marko? Generally, strength characteristics increase with density. Vapor permeability is a function of both density and thickness. x 48 in. The data are largely dependent on foam producer, as used substrates and production technology decide on intrinsic structure and foam density, and in such a manner - on capacity to carry mechanical loads. The performance of these foams has to be studied as a function of several parameters such as density, microstructure and also the strain rate imposed during dynamic loading. XPS, EPS & PU-high density foam Insulation materials with that special touch The applications for foamed insulation materials range from roof and façade insulation to perimeter insulation and impact sound insulation. It is usually white and made of pre-expanded polystyrene beads. However, variables such as the grade of raw material used, geometry of the molded part and processing conditions will affect package properties and performance. (5-Panels) (106) Model# AMDKIT001 $ 56 08. About Polystyrene foam; 1 cubic meter of Polystyrene foam weighs 50 kilograms [kg] 1 cubic foot of Polystyrene foam weighs 3.1214 pounds [lbs] Polystyrene foam weighs 0.05 gram per cubic centimeter or 50 kilogram per cubic meter, i.e. Intro to Surfboard Foam; Intro to Stringers; Blanks Catalogue 2020; Quick Ref Blanks Chart; Foam Density Chart; So what is Superwhite Foam? Some mattress brands use the terms ‘density… In practice, the density gradient is highly susceptible to the type of blowing agent used and much of the success of the process is dependent on proprietary techniques for formulating and controlling this. It is meant to fill empty space or to be used as insulation and strangely, this is the quality of EPS that many surf manufactures use to build surfboards. 0000001737 00000 n These values are the common density range for EPS foam for bicycle helmets [12], and they were de fined by the stress-strain curve of EPS with different densities as shown in Figure 3 [13]. Joined: 02/23/2005 . What is Superwhite Foam? Surfblanks is dedicated to producing the highest quality foam/stringer combinations. 0000012408 00000 n If you were to tell a stranger that foam has density, weight, and firmness characteristics, he or she would likely understand, given how common the terms are. What is Pacific Foam? A common misunderstanding is that the density of foam – in a mattress or pillow for example – determines its firmness. 0000013209 00000 n Here at ICA we manufacture Low Density EPS foam blocks all the way up to 2.85 lb density. This means that EPS can be used in a lightweight fill application, where it is used in the place of low bearing capacity foundation soils or heavy fill materials, to prevent the associated issue of unacceptable rates of settlement. A wide range of blank shapes (see Blank Families) puts the shaper closer to the design target. Generally, strength characteristics increase with density, however the cushioning characteristics of EPS foam packaging are affected by the geometry of the molded part and, to a lesser extent, by bead size and processing conditions, as well as density. 0000004153 00000 n When choosing EPS, original equipment manufacturers realize cost savings across the board. Density affects foam durability and support. The result is the weight in kilograms that a cubic metre of EPS can support when fully submerged in water. As seen in the table below, most properties of foams are strong functions of density, which allows a processor to fine-tune the exact performance needed by a simple processing change, without redesign of tooling. A low-density foam can still be firm or hard. Molded EPS can be treated with anti-static agents to comply with electronic industry and military packaging specifications. x 48 in. Benchmark Foam’s closed-cell High-Density EPS expanded polystyrene . With the average package handled by up to nine different people and with more than 445,000 packages a day per distribution facility, the risks of the distribution environment can be great. On the surface, it would seem the density or weight of a material would allow you to draw a correlation about its firmness, and vice versa. Home  |  News & Announcements  |  Contact Us  |  Related Links  |  Privacy Policy. Surf specific EPS. However, EPS may absorb moisture when it is completely immersed due to its fine interstitial channels within the bead-like structure. density, STYROBAR® can be produced with a variety of qualities suited to particular applications ranging from insulating boards to lightweight structural units. – 0; Compressive strength, p.s.i. Beyond its competitive material pricing, EPS - because of its versatility and lightweight characteristics - can offer savings in design and development, product assembly and distribution costs. 50% r.h. is 4x1013 ohm-cm. When you compare EPS and XPS insulation at the same R-values, EPS insulation can be between 10 to 30 percent less expensive and costs about 19 cents per sq. Foam density is also relative and shouldn’t be used to compare different product types. Dry EPS R-value ranges from 3.1 to 4.3 R per inch depending on density. These properties, in combination with satisfactory engineering considerations provide the design flexibility required to create truly cost-effective protective packaging.With the average package handled by up to nine different people and with more than 445,000 packages a day per distribution facility, the risks of the distribution environment can be great. The density range is about 28-45 kg/m 3. Last post. To cut the foam is a different story to cutting wood but also requires the right supplies for the task. 0000001311 00000 n It is usually white and made of pre-expanded polystyrene beads. 0000000987 00000 n trailer << /Size 52 /Info 18 0 R /Root 21 0 R /Prev 93118 /ID[<2900b48cfc39341d78a8fe884ee9df4e><2900b48cfc39341d78a8fe884ee9df4e>] >> startxref 0 %%EOF 21 0 obj << /Type /Catalog /Pages 19 0 R >> endobj 50 0 obj << /S 143 /Filter /FlateDecode /Length 51 0 R >> stream Copyright 2012 © EPS Industry Alliance. When choosing EPS, original equipment manufacturers realize cost savings across the board. EPS foam insulation may experience dimensional and property changes when it is exposed to temperatures greater than 167°F. http://www.EPSFoamPro.comWhat is High Density Expanded Polystyrene EPS Foam? It is produced from solid beads of polystyrene. The actual R-value of EPS depends on its density, with higher-density foams having higher R-values ranging from about 3.6 to 4.2 per 25 mm. 0000002553 00000 n Expanded polystyrene foam (EPS) produced by EUMEPS members. The EPD applies to 1 m³ and 1 m² with R-value 1 (in EPD Annex) with average density of 20 kg/m³. EPS protective packaging offers a broad range of physical properties to the designer and user. Construction-grade EPS is used as a filler. Amvic Multipurpose High Density Insulation Kit R10 2-3/8 in. However, its actual R-value of foam insulations varies, depending on the density of each sheet of insulation. (5-Panels) (106) Model# AMDKIT001 $ 56 08. With an in house technical division, regional project managers and nation-wide sales consultants, if you would like more building project specific data, we are here to help your project best meet its insulation needs …. Beyond its competitive material pricing, EPS – because of its versatility and lightweight characteristics – can offer savings in design and development, product assembly and distribution costs. Less-expensive EPS—typically sold at home improvement warehouse stores—is 0.4 kg (1 lb) density per 0.02 m 3 (1 cf), appropriately called Type-I density EPS. The volume resistivity of molded polystyrene within the 1.25-2.5 pcf density range, conditioned at 73° F and 50% r.h. is 4x1013 ohm-cm. EPS is highly resistant to heat flow. http://www.EPSFoamPro.comEPS foam can support 48-55 lbs. The density chart below offers great choices for lightness and strength. ). All rights reserved. 0000003409 00000 n This quality product is less expensive than alternative forms of rigid insulation, giving you the best value in the industry. primarily on density, as illustrated in Table 1. `s8�'���q�Y��s�m7�[�N�_��7@5�Ʀa ����i`�����`惭eL��2@,�Þ���>�#� ��,37�d�]X�=E��C�;&�����ݹ�몂��b��� } zw6T endstream endobj 51 0 obj 184 endobj 22 0 obj << /Type /Page /Parent 19 0 R /Resources 23 0 R /Contents 31 0 R /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 >> endobj 23 0 obj << /ProcSet [ /PDF /Text /ImageC ] /Font << /F5 24 0 R /F6 29 0 R /F7 25 0 R /F8 34 0 R /F9 35 0 R /F10 37 0 R /F11 39 0 R >> /XObject << /Im1 48 0 R /Im2 49 0 R >> /ExtGState << /GS1 42 0 R >> /ColorSpace << /Cs5 30 0 R >> >> endobj 24 0 obj << /Type /Font /Subtype /Type1 /FirstChar 32 /LastChar 181 /Widths [ 482 482 334 964 964 1333 1087 272 370 370 592 600 482 444 482 370 964 964 964 964 964 964 964 964 964 964 482 482 600 600 600 791 800 1012 1012 1012 1061 864 839 1061 1042 296 791 987 765 1332 1087 1087 939 1087 987 987 864 1042 964 1332 1012 964 913 370 370 370 600 500 272 765 791 741 791 765 494 791 791 272 272 716 272 1235 791 815 791 791 642 765 593 791 690 1042 690 667 667 370 222 370 600 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 482 964 964 482 482 482 482 482 800 482 482 482 482 482 482 482 600 482 482 482 791 ] /Encoding /WinAnsiEncoding /BaseFont /JLJKLF+Eurostile-ExtendedTwo /FontDescriptor 26 0 R >> endobj 25 0 obj << /Type /Font /Subtype /Type1 /FirstChar 32 /LastChar 240 /Widths [ 250 333 408 500 500 833 778 180 333 333 500 564 250 333 250 278 500 500 500 500 500 500 500 500 500 500 278 278 564 564 564 444 921 722 667 667 722 611 556 722 722 333 389 722 611 889 722 722 556 722 667 556 611 722 722 944 722 722 611 333 278 333 469 500 333 444 500 444 500 444 333 500 500 278 278 500 278 778 500 500 500 500 333 389 278 500 500 722 500 500 444 480 200 480 541 250 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 500 500 0 0 0 0 0 760 0 0 0 250 0 0 250 564 250 250 0 500 250 250 250 250 250 0 0 250 0 0 0 0 0 250 0 250 250 0 0 0 250 0 0 0 0 0 500 1000 444 444 0 0 0 250 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 250 ] /Encoding /MacRomanEncoding /BaseFont /JLJNFE+TimesNewRomanPS /FontDescriptor 28 0 R >> endobj 26 0 obj << /Type /FontDescriptor /Ascent 705 /CapHeight 705 /Descent -225 /Flags 32 /FontBBox [ -221 -279 1326 1042 ] /FontName /JLJKLF+Eurostile-ExtendedTwo /ItalicAngle 0 /StemV 190 /XHeight 465 /CharSet (/u/k/m/l/P/o/c/D/comma/y/p/x/e/S/d/F/f/a/E/r/space/h/g/s/i/t/n) /FontFile3 40 0 R >> endobj 27 0 obj << /Type /FontDescriptor /Ascent 705 /CapHeight 705 /Descent -225 /Flags 262176 /FontBBox [ -60 -250 1270 993 ] /FontName /JLJLKB+Eurostile-Demi /ItalicAngle 0 /StemV 126 /XHeight 465 /CharSet (/u/d/Y/F/f/I/E/period/h/J/P/w/i/L/y/x/zero/M/n/one/H/k/O/two/m/l/g/three\ /o/A/R/parenleft/p/four/S/parenright/five/bullet/U/B/a/r/space/V/b/C/K/N\ /s/W/c/D/T/comma/t/eight/X/e/G/hyphen) /FontFile3 41 0 R >> endobj 28 0 obj << /Type /FontDescriptor /Ascent 705 /CapHeight 705 /Descent -225 /Flags 34 /FontBBox [ -167 -216 1009 878 ] /FontName /JLJNFE+TimesNewRomanPS /ItalicAngle 0 /StemV 87 /XHeight 465 /CharSet (/u/d/nine/F/f/I/quotedblright/v/E/period/h/colon/J/P/w/slash/semicolon/i\ /L/endash/percent/y/x/zero/j/M/n/less/z/one/k/H/O/two/m/l/g/three/o/pare\ nleft/A/R/p/four/S/parenright/quotedblleft/q/five/U/emdash/B/a/r/space/s\ ix/b/V/C/K/s/seven/W/c/N/D/comma/T/t/eight/e/G/hyphen) /FontFile3 45 0 R >> endobj 29 0 obj << /Type /Font /Subtype /Type1 /FirstChar 32 /LastChar 240 /Widths [ 352 309 474 705 705 905 781 238 348 348 705 584 352 266 352 682 705 705 705 705 705 705 705 705 705 705 352 352 584 584 584 595 975 709 716 696 754 619 582 727 769 276 583 715 565 1007 827 715 686 766 722 673 587 754 677 1113 693 670 648 348 278 348 584 500 371 589 594 551 593 570 348 594 598 236 225 539 252 924 598 582 596 597 471 557 425 593 491 796 500 485 475 389 280 389 584 352 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 705 705 0 520 0 0 0 790 0 0 0 352 0 0 352 584 352 352 0 593 352 352 352 352 352 0 0 352 0 0 0 0 0 352 0 352 352 0 0 0 352 0 0 0 0 0 0 0 0 0 0 0 0 352 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 352 ] /Encoding /MacRomanEncoding /BaseFont /JLJLKB+Eurostile-Demi /FontDescriptor 27 0 R >> endobj 30 0 obj [ /CalRGB << /WhitePoint [ 0.9505 1 1.089 ] /Gamma [ 2.2222 2.2222 2.2222 ] /Matrix [ 0.4124 0.2126 0.0193 0.3576 0.7152 0.1192 0.1805 0.0722 0.9505 ] >> ] endobj 31 0 obj << /Length 2712 /Filter /FlateDecode >> stream x 48 in. While molded polystyrene is nearly impermeable to liquid water, it is moderately permeable to vapors under pressure differentials. Typical Properties of … The thermal conductivity (k factor) of molded polystyrene varies with density and exposure to temperature, as shown in the table below. Table 8 An ideal FIP structure would contain a conventional urethane foam density in the non-reinforced core of the laminate with a rapid increase in the reinforced skins. The manufacturing process for EPS conventionally begins with the creation of small polystyrene beads. V Foam V EPS where, λ is the thermal conductivity (W/m K), γ is the density (kg/m 3), V EPS is the volume of EPS (%) and V Foam is the volume of foam (%) In order to verify the proposed equation, the effective factors (density and EPS volume) were inserted into the proposed equation and consequently compared with experimental results and the ACI committee equation [141] . EPS is even lower making the differences even greater. Not all EPS is created equally. 0000015378 00000 n 0000019307 00000 n Surfblanks Australia has been making surfboard foam since 1968. There is a number of references illustrating the effects of foam density on mechanical properties of PU foams [2,5]. Some mattress brands use the terms ‘density… These properties, in combination with satisfactory engineering considerations provide the design flexibility required to create truly cost-effective protective packaging. Select Your Blanks from Catalogs Below. Your shaping effort and dust is reduced by more than 1/2 when ordering your blank customized. Most organic solvents are not compatible with EPS. At frequencies up to 400 MHz, the permittivity is 1.02-1.04 with a loss factor less than 5x10-4 at 1MHz and less than 3x10-5 at 400 MHz. 0000004671 00000 n Generally, neither water nor vapor affects the mechanical properties of EPS. At frequencies up to 400 MHz, the permittivity is 1.02-1.04 with a loss factor less than 5x10-4 at 1MHz and less than 3x10-5 at 400 MHz. The resilience of EPS insulation board provides reasonable absorption of building movement without transferring stress to … EPS foams can be used to absorb energy. EPS Size & Density. Lower density foam is also great for occasional-use comfort products. Team; Industry News; Contact Us; Shipping and Returns; FAQ; Cart ($0.00) DOWNLOAD DENSITY CHART PDF. It causes superficial yellowing and friability, but does not otherwise affect physical properties. The blocks are then placed on the storage floor to age for the appropriate length of time before being cut into various shapes and sizes. Density is a function of the chemistry used to produce the foam and additives included with the foam chemistry. These cells occupy approximately 40 times the volume of the original polystyrene bead. The water buoyancy per cubic metre of EPS is determined by subtracting its kg/m3 density from 1000. Standard-sized EPS foam insulation is available in multiple sizes up to 36-inches thick and 16-feet long or larger. Although ICA does not stock any cut foam, regularly cut sizes are: 48 inches by 96 inches and 24 inches by 96 inches. Millions of manufacturers over the past 40 years have relied on EPS transport packaging because of its exceptional cushioning properties and high tensile strength. The EPS foam is delivered by truckload and provided based on the client’s provided takeoff and specifications. Strongly relied upon in the food distribution industry, EPS is ideal for long distance shipment of perishable foods. per cubic foot, which is significantly more than typical wood floatation devices. Newsletter. The mechanical properties of EPS foam depend primarily on density, as illustrated in Table 1. 0000001486 00000 n 72 sq. 7 posts / 0 new . K) at 10 °C. EPS protective packaging offers a broad range of physical properties to the designer and user. Densities can range from 10 grams per litre (0.6 pounds per cubic foot) to 48 grams per litre (3.0 pounds per cubic foot). The table below breaks down PCF ranges for low-, medium-, and high-density polyfoams and memory foams. Last seen: 12 years 9 months ago . EPS (Expanded Polystyrene) or as many know by The Dow Chemical Company's trademarked name, STYROFOAM, is an extremely lightweight product that is made of expanded polystyrene beads.Originally discovered by Eduard Simon in 1839 in Germany by accident, EPS foam is more than 95% air and only about 5% plastic. Four different density values of 50 kgmˉ³, 64 kgmˉ³, 80 kgmˉ³ and 100 kgmˉ³ were considered in this study. 0000019244 00000 n 0000043346 00000 n H��W�r�8��^��L�4�;7/�I��IM�. 0000009281 00000 n Expanded Polystyrene is manufactured in conformance with numerous standards. – 2; Electrical Properties. 0000008872 00000 n Duration of temperature, external load conditions, and density are the variables affecting foam insulation at elevated temperatures. Use Benchmark Foam’s High-Density EPS as a thermal barrier be-neath the concrete slab when installing a radiant floor heating sys-tem. ASTM C578 Standard Specification for Rigid Cellular Polystyrene Thermal Insulation addresses the physical properties and performance characteristics of EPS foam as it relates to thermal insulation in construction applications. This pertains to all varieties of foam, including expanded polystyrene , polyethylene, polyurethane foam, and others. Its uniform, closed cellular structure limits radiant, convective and conductive heat transfer. 0000031203 00000 n Surfblanks Lite EPS. XPS is another form of a foam which offers improved surface roughness and higher stiffness with reduced thermal conductivity. Virgin EPS; I-Foam; Stringers +-Poplar Ply; Appelcore; Bamboo; Bass; High Density; Services +-CNC Cutting; 3D Scanning ; Recycling; Deliveries; Where To Buy +-Shapers Who Use Marko; Distributors ; About Us +-Why Marko? Size and density. What is Pacific Foam? Team; Industry News; Contact Us; Shipping and Returns; FAQ; Cart ($0.00) 2018 Catalog. About Polystyrene foam; 1 cubic meter of Polystyrene foam weighs 50 kilograms [kg] 1 cubic foot of Polystyrene foam weighs 3.1214 pounds [lbs] Polystyrene foam weighs 0.05 gram per cubic centimeter or 50 kilogram per cubic meter, i.e. Durable, lighter, and stronger than traditional polyurethane foam, and stronger than traditional foam... To temperatures greater than 167°F cells occupy approximately 40 times the volume of the used... A radiant floor heating sys-tem ; Downrailers ; Eggs ; Guns ; Fish ; Kiteboards ; Starter Kits eps foam density chart! Polystyrene is nearly impermeable to water and aqueous solutions of salts, acids and alkalis eps foam density chart not affect polystyrene! ’ re considering, for instance $ 56 08 table 1 moisture when is. Most confusing things about foam is a rigid and tough, closed-cell foam with a 5.0 foam density doesn t... Is significantly more than 1/2 when ordering your blank customized affecting foam insulation may experience dimensional and property changes it..., and others cuts and shapes can be messy, time-consuming, a! Pcf density range of physical properties to the designer and user R-7.8 at 50 mm ( 2 in is in... Bead-Like structure tests were conducted on cubic specimens of EPS material is approximately 2KV/mm as shown the. X 49″ x 121-1/2″ – 220″ polystyrene varies with density and thickness a of! Foam its unique characteristics Downrailers ; Eggs ; Guns ; Fish ; ;! Recycled material Content expands when heat in the form of steam is applied, forming... | Contact Us ; Shipping and Returns ; FAQ ; Cart ( $ 0.00 ) Catalog! 56 08 conducted on cubic specimens of EPS foam insulation may experience and... To 4.3 R per inch depending on the density CHART PDF, medium-, and others making the even. Variables affecting foam insulation is available in any thickness up to 2.85 lb density solutions of salts, acids alkalis... Of rigid insulation, giving you the weight in kilograms that a cubic metre of.! Original equipment manufacturers realize cost savings across the board a thermoset, it is completely immersed to!, medium density and thickness polyethylene, polyurethane foam, and others ( EPS is! Packaging specifications of thermal insulation see blank Families ) puts the shaper closer the... Polystyrene EPS foam with eps foam density chart length of 25mm ( Figure 1 ) thermal insulation is manufactured in conformance with standards. Is equal to 50 kg/m³ ; at 20°C ( 68°F or 293.15K ) at standard atmospheric pressure variables... Occasional-Use comfort products Polymer Network ( IPN ) of pvc and polyurea molded EPS depend largely on,. Expanded polystyrene EPS foam with a variety of qualities suited to particular applications ranging from boards... With electronic industry and military packaging specifications purchase EPS foam is the generic name... Downrailers ; Eggs ; Guns ; Fish ; Kiteboards ; Starter Kits ; Shaping products -.... Tough, closed-cell foam with a 5.0 foam density doesn ’ t say much about the love seat you re! Pcf density range, conditioned at 73° F and 50 % r.h. is 4x1013 ohm-cm molded., as illustrated in table 1 the foam chemistry styrene and most fuels, yet is compatible with most and. By virtue of small polystyrene beads when heat in the table below breaks down PCF for. You the best value in the table below breaks down PCF ranges for low-, medium- and... Water and provides zero capillary heat transfer x 121-1/2″ – 220″ of these polymers gives the foam.! Be used to compare different product types EPS foam depend primarily on density as! To liquid water, it is usually white and made of pre-expanded beads! At temperatures up to 184°F to comply with electronic industry and military specifications... And green etc k factor ) of pvc and polyurea a different story to cutting wood but requires... The board or larger the food distribution industry, EPS may absorb moisture when it is moderately to. 10 to 14 psi Families ) puts the shaper closer to the designer user! In the table below breaks down PCF ranges for low-, medium- and. The generic industry name used for white rigid material made from the expanded polystyrene ( EPS produced. Kind of chemical composition as of the product, then the higher the density of 20 kg/m³ EPS a. Agents to comply with electronic industry and military packaging specifications pressure differentials fine interstitial channels within the bead-like.... Unique characteristics x 12″ x 12″ block weighed 3LB permeable to vapors under pressure differentials steam applied... Used for white rigid material made from the expanded polystyrene, polyethylene, foam... Even lower making the differences even greater manufacture Low density, medium density and exposure to,! To its fine interstitial channels within the polystyrene bead used to compare different product types when EPS... ’ re considering, for instance external load conditions, and High-Density polyfoams and memory.. Low density, that means its 12″ x 12″ block weighed 3LB forming closed cells of EPS..

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