It is important that the casting resin is carefully mixed and poured slowly into the mold; otherwise, too many air bubbles will be added. As a floor covering, it is abrasion-resistant and very elastic. No properties are lost in this color transformation. We manufacture products in polyurethane and plastic using methods of open cast and injection moulding. … Thanks to its thermoplastic nature, it has several benefits over other elastomers are unable to match, such as: Excellent tensile strength, High elongation at break, and; Good load bearing capacity The physical properties of polyurethane are considerable. Plei-Tech® 00 is a polyester compound developed in conjunction with Plei-Tech® 22 to offer alternatives to Plei-Tech® 15. Plei-Tech® 10 is a very high performance polyurethane that is best suited for the most demanding applications. Use our interactive properties table below to explore by property group, sort, or compare two or more plastic materials. use the injection molding process to mold TPU into required TPU injection molding parts, which are divided into three stages: pre plasticizing, injection, and ejecting out. This compound is not as good in dynamics, has a higher compression set, and slightly lower solvent resistance as Plei-Tech® 22. General Plastics Mfg. Load bearing capacity All rights reserved. Excellent elongation and tear strength for abusive applications. Plei-Tech® 95 offers excellent performance in dynamic loading, shock absorption, and water environments. Polyurethane 1K adhesives consist, as the name suggests, of only one component. Below are some of the benefits and advantages of polyurethane: Filling the Gap Between Rubber and Plastic. Polyurethane and rubber are very similar but differ greatly in their strengths and weaknesses. Maximum service temperature is 200°F. © Copyright Pleiger Plastics Company. Like all polymers, its performance comes from its molecular make-up. In addition to exceptional physical properties Plei-Tech® 10 also offers excellent dynamic properties. Examples of fillers are, among others, cotton flocks, glass fibers, mineral fillers, and lightweight fillers. Lubrithane is ideal for belt scraping applications because of good abrasion resistance and a low coefficient of friction. In general, the casting resin consists of a two-component system of resin and hardener, which hardens after mixing through a chemical reaction. Plei-Tech® 00 offers outstanding tear strength, good abrasion resistance, excellent resistance to oil products, and is suited for moderate dynamic loading. inertness. However, if you want to cast polyurethane, there are two things to consider: Fields of application for mold casting are, among others, the following: mold casting enjoys great popularity both in industry and among small users and can be carried out not only by machine but also by hand. Approximate Compression Deflection Polyurethanes are outstandingly able to withstand more loads than rubber because they are harder than rubber and yet more flexible than plastics. In mold casting, both liquid components mixed together are poured into a mold. Maximum service temperature is 190°F. Color is natural which is light brown that turns dark brown when exposed to UV light. Polyethylene is known in the industry as poly tubing or PE. Polyurethane casting resin is particularly popular in industrial buildings such as car workshops or various halls, as it not only scores points visually and protects the underlying floor – often concrete – from high loads, but also has many other positive properties. Great for high wear applications. This can be seen as a disadvantage, but also as an advantage, because after all, it also results in it being quick to unmold. It has been proven to be vastly superior to rubber plastics and metal in many applications. Due to its strength and durability, polyethylene is often used to create plastic bottles as well as corrosion-resistant pipes. Advantages and Disadvantages of Polyurethane Resin Before you buy PUR resin, you should, of course, carefully check the polyurethane casting resin properties to find out whether it is suitable for your purposes. Flexible foams have high impact strength and cushioning. When to Use Polyethylene Tubing The material then hardens. Polyurethane Rubber Tubes Use these tubes as jackets, seals, and insulation in areas where rubbing and scraping could cause wear on rubber. In outdoor applications, it should be preferred over epoxy resin coating because, unlike the latter, it does not have a tendency to yellow due to its high UV resistance and can also withstand sharp temperature fluctuations optimally. When storing polyurethane casting resin, care must be taken to avoid large temperature fluctuations. This product is also available as a foam which has tremendous dynamic performance and abrasion resistance. It has various favorable properties which are not only used by industry but also by private users. They are unique in combining the strength of rigid plastics with the flexibility and elasticity of rubber. When you use ABS plastic, you get a material that is impact, chemical, and heat resistant. Polyurethane casting resin has a wide range of properties that vary from application to application and cover a wide range of possibilities. Thermoset polyurethanes have many advantages over plastics for a variety of applications, including: In general, PU cast resin is a very pleasant material with many advantages and only a few disadvantages. IS TENSILE STRENGTH (RESISTANCE TO BEING PULLEDAPART) IMPORTANT? Thermoset Polyurethane VS Plastic . Plei-Tech® 22 offers excellent abrasion and solvent resistance compared to other polyurethane compounds. Maximum service temperature is 200°F. For example, the user can add an inhibitor to the resin to increase the so-called pot life, i.e., the processing time. Excellent Impact, Cut, And Abrasion Resistance. Polyurethane is, therefore, a fascinating material, both for industrial purposes and for domestic use. Polytek ® 's two-part, room-temperature curing polyurethane plastics are available in varieties that can be poured, brushed or sprayed to create castings with unlimited versatility.. Boyce1 1Department of Mechanical Engineering, Massachusetts Institute of Technology Cambridge, MA 02139 2Department of Mechanical Engineering, University of Colorado Boulder, CO 80309 Submitted in December 2003 Revised in July 2004 It withstands not only high thermal but also mechanical loads and is easy to apply. Excellent resistance to thermal shock. Wipe away all excess finish from the rim and lid before replacing the lid to prevent air from entering … For chemically resistant plastic, view our Chemical Resistance of Plastics chart. Although it is not as flexible as polyurethane, it is still great at resisting moisture as well as cracks and other punctures. Typical applications are bumpers, diaphragms, rollers, and hydrocyclones. Polyurethane Rubber Rods Stronger than natural rubber, these polyurethane rods combine the shock-absorbing qualities of rubber with the tear resistance of plastic. Polyurethane is an artificially made material. This product has tremendous dynamic performance and abrasion resistance and is used where high frequency low loads are present. Typical applications are scrapers, snow plows, and squeegees. The most commonly used rubbers are also artificially made but there's also natural rubber. There are several different resins available on the market, and each type has its advantages and disadvantages – including polyurethane casting resin. After curing, soft materials are indicated in Shore hardness A and harder materials in Shore hardness D. The former have a rubber-like consistency. Flexible foams. Maximum service temperature 190°F. Kormax Polyurethane […] Otherwise, the polyurethane casting resin may lose its favorable properties. Density ranges are from .35 g/cc to .60 g/cc. PU resins that have to be processed quickly, but at the same time can also be unmolded quickly, are generally called fast-casting resins. Thus, not only thermoplastics but also thermosets and elastomers are produced from it. Unlike thermoset polyurethane, plastics will tend to remain permanently deformed or even break when stretching, abrasion or impact forces are applied. Pleiger Plastics provides polyurethane material properties data including hardness and physical properties in helping select the correct elastomer for your application or product. Will not swell or deteriorate when exposed to water. Color is natural which is light brown that turns to dark brown when exposed to UV light. Rubber – Goodyear Conveyor Belting 220 PIW WingfootII. Make sure to fix the workpieces during this time, for example with screw clamps. Typical applications are scrapers and sheets. Such properties can be investigated and compared between different products using standardised test methods. If you want to work with resin, you are spoilt for choice. head of water for the specified immersion period for 96 h is standard. The result of this is a material that combines the strength and rigidity of acrylonitrile and styrene polymers with the ruggedness of the polybutadiene rubber. Home » Complete Polyurethane Resin Guide – Everything you need to Know. Polyurethane (PUR) is a common medical grade resin that is versatile enough to be used in countless medical devices and extrusions. The above valves are believed to be true to the best of Pleiger Plastics’ knowledge based upon information provided by raw material suppliers. What is Polyurethane? Even at high durometers, urethane can be stretched to substantial elongations and will still return to its original dimensions. TPU (Thermoplastic polyurethane) plastic injection molding process has many methods, including injection molding, blow molding, compression molding, extrusion molding, etc., among which injection molding is most commonly used. PU casting resins can, just like epoxy resin and polyester resin, be combined with various additives as well as filling materials or colorants. Before the actual pouring of the PU resin, it is recommended that a base primer be applied as a floor coating. Often Kormax Polyurethane is used to replace rubber, plastics and metals because its toughness and durability. While most polyurethanes are thermosetting polymers that do not melt when heated, thermoplastic polyurethanes are also available. Plei-Tech ® 23 is a polyester polyurethane. Typical Frictional Properties (Coefficient of Friction)(ASTM D 1894-87), Plei-Tech® 15 Foam is an open/closed cell polyurethane foam based upon Vulkollan® (Plei-Tech ®15) chemistry. Then you can warm it up slowly and carefully to a maximum of 70 degrees Celsius to decrystallize it. Due to its low viscosity and various other properties, polyurethane resin is ideally suited for mold casting, regardless of whether the mold is lost or reusable. (No properties are lost in this color transformation. Lubrithane is a polyurethane with special additives to provide a reduced coefficient of friction. They also offer some protection against impact. But also for the production of damping and spring elements, casting tires, instrument transformers for medium and high voltage technology, drive elements as well as various wearing parts, the PU resin has become invaluable. Typical applications are bumpers, balls, and hydrocyclones. The final strength, i.e., the last degree of curing, is reached after about four to seven days, the minimum strength usually after about twelve hours. In our Polyurethane Resin Guide, we give you the most essential polyurethane casting resin properties and tell you what to look out for when buying polyurethane. But let’s keep it simple. In this case, let it cool down to room temperature before you process it further. Polyurethane can be produced in a broad range of harnesses from super soft [rubber band type hardness] through to hard nylon type consistency. Images: Chinnabanchon9Job / shutterstock.com. Before you buy PUR resin, you should, of course, carefully check the polyurethane casting resin properties to find out whether it is suitable for your purposes. For example, tensile properties of plastics such as plastic tensile strength and rigidity can be determined according to DIN EN ISO 527 by briefly applying load in one direction with a tensile test. If you want to work with such a resin, you must, therefore, pay attention to the pot life, otherwise the material hardens too quickly, and you have to start again from the beginning. With these, the user can influence properties such as mechanical strength, stiffness, or surface hardness. Polyurethane is actually not a (natural) rubber nor a plastic, but is something ‘in between’. If you want to buy polyurethane resin, you should also check the hardness level and whether it is suitable for your project. Polyurethane bridges the performance gap between rubber and plastic. They are made of polyurethane, which combines the shock-absorbing qualities of rubber with the tear resistance of plastic. The D scale is used for harder compounds from 50D up to 80D. It has properties between the characteristics of plastic and rubber. Polyurethane and Plastic Products was established in South Africa in 1978. The casting resin offers significant advantages, as it is easy to apply and very durable. Polyurethane is a polymer composed of organic units joined by carbamate links. Plei-Tech® 22 is a polyester compound developed by Pleiger Plastics Company as an alternative to Plei-Tech® 15. Very easy to clean. Plei-Tech® 22 is not suited for applications involving high dynamic loading. This material has higher tensile strength, tear strength, and flexlife than standard Plei-Tech® 22 in the same durometer ranges. The one setback of the material is that it takes a high compression set. More importantly, polyurethane retains it elasticity and strength over the complete range of hardness. Maximum service temperature is 200°F. This compound is not as good in dynamics, has a higher compression set, and slightly lower solvent resistance as Plei-Tech ® 22. This material is ideal for bumpers and cushions which require high displacements. Available from 60°A to 88°A, and can be colored. In general, PUR casting resin should be stored at a temperature of 15 to 25 degrees Celsius in closed containers. Available from 60°A to 88°A, and can be colored. Co. presents an overview of dielectric materials, as well as a comparison of polyurethane foam with other commonly used dielectrics. Images: bhakpong – stock.adobe.com, During the mixing process, it is strongly recommended to work extremely thoroughly. (ASTM D2842) Standard Test Method for Water Absorption of Rigid Cellular Plastics - This test method covers the determination of the water absorption of rigid cellular plastics by measuring the change in buoyant force resulting from immersion under a 5.1-cm (2-in.) The A scale is used for softer compounds; at Gallagher, the A scale is used for compounds from 55A up to 95A. Hoses, automotive bushings, seat foam, skateboard wheels, and Spandex are all common polyurethane applications. 2 Stress-Strain Behavior of Thermoplastic Polyurethane H.J. Polyurethane's mechanical properties can be isolated and manipulated through creative chemistry which creates a number of unique opportunities to solve problems with performance characteristics unequaled in any other material. Polyurethane casting resin is a fascinating material for both industry and the do-it-yourselfer. Overview: Kormax Polyurethane is a unique material that is sometimes called the man-made rubber. Polyurethane coatings are ideal for surfaces that need abrasion resistance. Usually it is a polymer. Polyurethane is a plastic that we encounter everywhere in our daily lives. Physical Properties Of Polyurethane. This material has higher tensile strength, tear strength, and flexlife than standard Plei-Tech ® 22 in the same durometer ranges. Depending on the chemistry formulation and the reaction process, polyurethane’s end-state performance is tailorable to meet exactly what you need. These plastics are separated into six different series, highlighted below. Polyurethane 1K Glue. Furthermore, it is not too cost-intensive. This gives them the desired properties. Standard color is blue, however this material is not color stable. Make sure that the packaging is airtight and moisture-proof when opened. Plei-Tech® 15 performs well in solvent and oil environments, and is available in hardness from 60°A to 60°D. For instance, thermoset polyurethanes can be soft and flexible as a cushion to something hard and rigid as a rock. Withstands temperatures of up to 190 degrees Fahrenheit. Lubrithane is available in hardnesses from 60°A to 50°D. Generally speaking, polyurethanes are synthetic resins or plastics that result from a polyaddition reaction between dialcohols or polyols and polyisocyanates. Plei-Tech® 23 is a polyester polyurethane. Its easy application and its many positive properties enable a clean production even without much previous knowledge. Polyurethane performs well for hardness, tensile strength, compression strength, impact resistance, abrasion resistance and tear strength. Here, too, the material’s high UV resistance comes into play. It is possible that the PU resin may crystallize slightly during storage. Qi1,2, M.C. As a result, this can be made very variable to suit any application. Plei-Tech® 10 offers outstanding cut, abrasion, and solvent resistance. Plei-Tech 15 offers excellent abrasion and cut resistance, and is well suited for high dynamic loading. PLEI-TECH® 00 | PLEI-TECH® 10 | PLEI-TECH® 15 (Vulkollan®) | PLEI-TECH® 22 | PLEI-TECH® 23 | PLEI-TECH® 24 |  PLEI-TECH® 25 | PLEI-TECH® 31 | PLEI-TECH® 66 | PLEI-TECH® 92 | PLEI-TECH® 93 | PLEI-TECH® 95 | LUBRITHANE | PLEI-TECH® 15 FOAM. This compound is MSHA approvable. In industry, both casting compound and casting are dried in some plants using vacuum and degassed beforehand. Standard color is natural (cream), however color coding is available. Polyurethane coatings provide resistance from harsh solvents such as industrial cleaners. The renovation of flat roofs is often carried out with the help of PU casting resin. Plei-Tech® 00 is available in 80°A to 95°A. However, PU also protects electronic assemblies from a wide range of environmental influences such as mechanical stress or moisture. Polyurethane polymers are traditionally and most commonly formed by reacting a di- or triisocyanate with a polyol. Color is black. High tear strength. In contrast to the production of foam, where a reaction with water and the resulting foam formation is desired, in all other applications, the surfaces with which the liquid PU resin comes into contact should be completely dry. It has the strength of plastic and the elasticity of rubber. Water-based solutions are also available. With these, the user can influence properties such as mechanical strength, stiffness, or surface hardness. Therefore, these are usually encapsulated. Maximum service temperature is 275°F. Chemical and oil resistant. Plei-Tech® 95 is not suited for applications involving solvents or petroleum based oils. (Click Graph to Enlarge). This product has general MSHA approval. The degree of hardness is indicated in Shore and should be noted on the respective packaging. Oil and solvent resistant Polyurethane has excellent resistance to oils, solvents, fats, greases and gasoline. Standard Color is amber, however this product is not color stable. How exactly you process PU casting resin naturally depends on its intended use. Polyurethane tubing merges properties of both rubber and plastic and is known for its exceptional toughness and tensile strength. In our polyurethane resin guide, we assume its use as a floor coating on concrete as well as mold casting. Plei-Tech® 22 is available in hardness from 40°A to 60°D. Polyurethane Type: L42: L100: L167: L315: Hardness, Durometer Value (ASTM d676-59T) 80A: 90A: 95A: 75D* Specific Gravity: 1.07: 1.10: 1.13: 1.21: Tensile Strength, MPa (psi) (ASTM D412-61T) 20.7 (3,000) 31.0 (4,500) 34.5 (5,000) 62.0(9,000) Elongation At Break, % (ASTM D412-61T) 800: 450: 400: 270: 100% Modulus, MPa (psi) (ASTM D412-61T) 2.8 (400) 7.6(1,100) 12.4(1,800) 32.0(4,650) Plus, ABS plastic … This compound has MSHA approval. … Polyurethanes (also called “urethanes”) are any of a family of elastomers, an artificial rubber. Their flexibility is accountable for their strength and remarkable ability to resist impact. Plei-Tech® 95 is available in hardnesses from 80°A to 75°D. Processing of PU Casting Resin – Step-by-Step Instructions, Storage and Durability of PUR Casting Resins, Safety Instructions for Processing Polyurethane Casting Resin, UV Glue – Best UV Light Glue for all Projects and Materials, How long does it take Epoxy to dry – Helpful Guide for Epoxy cure Time, What is Resin made of – All informations and Resin History, Best Wood Filler For Decks – Your Outdoor Wood Filler Guide, Polyurethane Rubber Overview – Polyurethane vs Rubber. Plei-Tech® 95 is a polyether polyurethane. Tensile Strength of Polyurethane Compared to Other Materials Thermoset polyurethanes come in many forms and durometers, which exhibit varying levels of tensile strength. Polyurethane is an extremely versatile elastomer used in countless applications worldwide. There are also color pigments and fluorescent dyes that can give the polyurethane resin a specific color. Since polyurethanes contain two types of monomers, which polymerise … The chart below show the physical properties of polyurethane. The typical hardness range for polyurethane compounds processed at Gallagher is 55A up to 80D; this range can be expanded based on specific applications. Process the opened containers as quickly as possible and shake the two components carefully but thoroughly before mixing. Polyurethane resin coatings are also often used in kindergartens and schools, as they reduce the risk of slipping and accidents. Plei-Tech® 10 is available in 80°A, 90°A, 93°, and 97°A hardnesses. Only available in natural color (cream). PUR is created by an exothermic, i.e., heat-releasing polyaddition reaction. For example, foams can be produced from PU, but also paints, adhesives, and coatings. Copyright 2020 by resin-expert.com – Your Epoxy Resin Guide, Join our mailing list and receive your free Epoxy Resin eBook sample with 25 pages!Epoxy Resin basics ✓The best Epoxy Resin for your Project ✓Resin Applications ✓Tips and Tricks ✓, Complete Polyurethane Resin Guide – Everything you need to Know, Advantages and Disadvantages of Polyurethane Resin, Breathable two component waterborne urethane, clear topcoat for Supercoat epoxy floors, non-yellowing, Industrial grade, Good chemical resistance, High gloss finish, Resists damaged caused by gasoline, brake fluid, standing water and battery acid, Protects epoxy floor from scratches, Encapsulates decorative flake, easy to clean, Polyurethane Casting Resin for Mold Casting. Also, you may want to use our Plastic Material Selection Guide or Interactive Thermoplastics Triangle to assist with the material selection process based on your application requirements. Model-Pro is a two component polyurethane casting resin which exhibits good impact resistance and strength. Polyurethane has many applications and many advantages: Excellent resistance to wear, cutting, oil, abrasion, ageing and selected solvents. Polyurethane foam is subsequently used in a myriad of industries such as aerospace, medical, construction, marine, and composite core. Parts made of polyurethane will often outwear other materials by a margin of 5 to 50/one when severe abrasion is a factor. ), PT-15 FOAM Casting resin for Making models, molds, protoypes, figurines, proof molds, make reproductions, etc.. Model-Pro turns from liquid to solid in 15 minutes and works excellent in silicone molds. Maximum service temperature is 200°F. The material tends to form strong bonds with hydrophilic coating systems. PleiTech® 00 falls short of Plei-Tech® 22, Plei-Tech® 23, Plei-Tech® 24, Plei-Tech® 25 and Plei-Tech® 15 in solvent resistance. After filling, you can lightly tap the filled mold with your fingers a few times to allow the air bubbles to escape. Plei-Tech® 15 is also known as Vulkollan® (trademark name of Bayer AG Germany). The material can be mixed in different proportions (‘systems’). This allows you to adapt the resin to your own requirements. To avoid too much air being mixed in, you can fill the mold from below instead of pouring in the resin from above. They have strong reinforcing ribs for strength and a space-saving, tapered design allows pails to nest. Plei-Tech® 95 falls slightly short of other Plei-Tech® compounds in abrasion and cut resistance. The areas of application for PU resin are incredibly diverse. Maximum service temperature is 190°F. Head of water for the specified immersion period for 96 h is standard both liquid components mixed together are into... 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Resin from above industry, both for industrial purposes and for domestic.. Are scrapers, snow plows, and composite core, let it cool down to room temperature before you it... Application and cover a wide range of properties that vary from application to and. For instance, thermoset polyurethanes can be stretched to substantial elongations and will return. These, the user can influence properties such as mechanical strength, stiffness, surface! Setback of the PU resin are incredibly diverse then you can warm it up slowly and to... A maximum of 70 degrees Celsius in closed containers artificial rubber not melt when heated, thermoplastic polyurethanes outstandingly! To plei-tech® 15 loads and is easy to apply, 93°, and heat resistant in 1978 BEING )! Are also artificially made but there 's also natural rubber from 60°A 88°A! Six different series, highlighted below you use ABS plastic, you can lightly tap the filled mold with fingers. 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