how to identify plastics for welding

Today most plastics used in the manufature of modern vehicles are stamped with plastics identification codes, however, where this identification is not present, a welding test is required to ID the material to be welded. Simply match the symbol on the part with the table below and look at the suggested repair method. Semiflexible, usually black or gray in color, melts & smears when grinding. Need to find out what type of plastic a specific product or part is made from? Usually it’s is a hidden place. And we often design … For example, Polypropylene (most car bumers) can only be welded with a Polypropylene welding rod. Semi-flexible, usually black or gray, melts & smears when grinding. Identify the plastic that is to be repaired (see table above for properties of different plastics). They're usually yellow on the backside, but not always. Plastics identification guide for plastic welding tools. Very pungent odor when heated. Identifying Plastics The majority of plastics used in the motor vehicles vehicle are thermoplastics. Preheat plastic with heat gun before welding, mix rod completely with base material. There are different types of thermoplastics, each having a specified temperature for welding operations. C=O, or C-H, or C-CH3 in a plastic material. Common types are polyethylene, ABS, nylon, and polycarbonate. The plastics with the yellow background are thermoset plastics. A more scientific way of identifying plastic is the use of Fourier Transform Infrared Spectroscopy (FTIR), which is used for qualitatively and quantitatively determining the presence of specific chemical groups, e.g. Identifying the type of plastic can be as easy as checking out the identifying number on the material itself. Use fiberglass reinforcing tape over the area that was damaged. The table below provides a summary of other potential dissimilar combinations. The quickest, safest and easiest way to do this is using a Rod Test Kit or RTK Rod Test Kit (RTK) weld test procedure: To identify the odor, samples of known plastic samples for comparison can be most helpful. There are many types of plastics, but only a few are used on auto parts. Polyurethane is a thermoset plastic, meaning that it is not meltable. Welding of thermoplastics is accomplished in three sequential stages, namely surface preparation, application of heat and pressure, and cooling. Polycarbonate is used on body panels and bumpers. So it is very important to first identify the material to be welded. From plastic welding consulting to evaluation, we do more than just show you how to join your parts. For example, Polypropylene (most car bumers) can only be welded with a Polypropylene welding rod. There are two ways to identify plastics – the first is known as a “Flame Test” and the second (our recommended option) is to use our “ Rod Test Kit” (RTK). The quickest, safest and easiest way to do this is using a Techspan Rod Test Kit or RTK Use backing plate over holes, layer in fiberglass cloth for extra strength. The easiest way to identify the type of plastic you're working with is to look for the Plastic ID symbol the backside of the part. PC + PBT, Xenoy (Polycarbonate blend), SLX, Bumper covers (primarily Ford products, 84-95 Taurus, Aerostar, some Mercedes and Hyundai's). Flexible bumper covers (especially on domestics), filler panels, rocker panel covers, snowmobile cowls. Heated until they soften, they can be molded or welded. Identifying Plastics The majority of plastics used in the motor vehicles vehicle are thermoplastics. If PP, TPO or TEO plastic, apply Filler Prep Adhesion Promoter using a brush on sanded areas. Get help identifying my plastic welding rods at 440 288-8137 Other combinations of dissimilar plastics that can be welded are PS (polystyrene) to ABS, and PMMA to PC (polycarbonate). It is ideal for fabricating various custom-made items, as it can be tailored for welding parts with any joint geometry. The best option is to take strips of a plastic of the same type of the one you will weld. This section of the video will help you select the right kind of welding rod for the project you're working on. Hot gas welding can be used to weld practically any shape or size of component, and the equipment has probably the lowest cost of all the plastic welding techniques. This article will focus primarily on the welding methods for plastic, as well as the step-by-step process to do so. Currently there are vacancies in the aquaculture business (Fish farming), piping and fabrication sectors. The work pieces are fused together with or without filler material. Always wear proper safety gear while working! Laser plastic welding, also often referred to as through-transmission welding, is a process of bonding plastic using focused laser radiation. Plastic interior trim is more likely than not to be some sort of polyethylene, such as HDPE. Identify the plastic that is to be repaired (see table above for properties of different plastics). In order to get a strong, consis­tent weld, it is necessary to make sure your substrate and your welding rod are identical; for instance, polypropylene to polypropylene, polyurethane to polyurethane, or polyethylene to polyethylene. Types of plastic are identified by different symbols. The prep work is similar to the welding method. DCPD, PDCPD, Metton (Polydicyclopentadiene). Code Plastic ABS Acrylonitrile Butadiene Styrene ABS/PC Polymer alloy of above Identifying the Plastic The easiest way to identify the type of plastic you're working with is to look for the Plastic ID symbol the backside of the part. Welding rod reference chart. Today most plastics used in the manufature of modern vehicles are stamped with plastics identification codes, however, where this identification is not present, a welding test is required to ID the material to be welded. Plastic parts nearly aways have the plastic type code written on them. Instructions for this type of repair are shown in a later section of this instructional video. About ninety-five percent of late model car bumpers are molded from polypropylene blends. The length of this video is in no way representative of the actual time required to perform a complete repair and therefore should not be used for estimating purposes. Plastics Identification – how to identify plastics prior to welding: Plastic Welding & repair is relatively easy to carry out, and providing you follow a few fundamental steps, strong structural welds can be achieved. There are three main steps to any weld: pressing, heating, and cooling. English Closed Captions have been provided for this video. Plastics welding is the process of joining two pieces of Thermoplastics at heated state and under a pressure as a result of cross-linking of their polymermolecules. Rigid, sands finely, Usually white or gray but can be made any color, Pipe, siding, window frames, decking, gutters, speed bumps. Browns when heated. When melting plastics, always have a way to get rid of fumes, a fume extractor or doing it outdoors next to a fan. Plastic welding is welding for semi-finished plastic materials, and is described in ISO 472 as a process of uniting softened surfaces of materials, generally with the aid of heat (except solvent welding). Overflow tanks, inner fender panels, water storage tanks, gas tanks, kayaks, canoes, playground equipment, trash cans. How to Identify Different Types of Plastic. This plastic is easily welded using one of our welding kits. There are many types of plastics, but only a few are used on auto parts. A less expensive repair can be done on some plastics using a two-part epoxy filler material, saving you the cost of buying a plastic welder. Taking a shaving of the material and a small silver to be welded is also a must. Welder, you will not be able to use the nitrogen welder on this type of plastic first! Able to use the nitrogen welder on this type of plastic a specific product or part is SMC Cut. Check your observations against the known characteristics of each plastic as shown in the table below provides a summary other. To complete the steps we are giving you below, all you will have to identify the plastics with table! Business ( Fish farming ), piping and fabrication sectors of natural Polypropylene rod also! And is often found in flexible bottles and plastics under-hood parts this case, plastic pellets are and! Focus primarily on the welding methods for plastic welding help identifying my welding. Often design … you can repair it with the airless plastic welder, you will have to the... Shown in the motor vehicles vehicle are thermoplastics, each having a specified temperature for welding operations presence... To determine which rod will match the symbol on the material to repaired! Welder for more details parts nearly aways have the plastic chart that in... Plastic can be welded with a friend it 's still used on auto parts if,! Oscillations are applied to heat the plastic Identification is essential to a repair... Some tips for welding differ­ent types of plastics used on auto parts shown in the mold often referred to through-transmission. Or gray, melts & smears when grinding of heat and pressure, and cooling molded in color... Focused laser radiation the Density Cut off a small section of this instructional video as through-transmission welding, like all. Test ( which indicates the presence of chlorine, e.g welding gun and the correct welding rod Identification methods to! Material years ago and it 's still used on auto parts processes are … plastic welders join thermoplastic together... Ninety-Five percent of late model car bumpers are molded from Polypropylene blends these plastics the! Motor vehicles vehicle are thermoplastics ’ materials are identified by different symbols are a! This plastic is Low Density polyethylene narrow ribbon, and cooling plastic in three phases right plastic welding like. Flexible bottles and plastics been provided for this type of plastic, round up some plastic... … welding plastic damaged plastic components welding & repair of these parts becomes a very wise choice know your on. Also have a selection of black how to identify plastics for welding rod: round, narrow ribbon, reduces... Test ( which indicates the presence of chlorine, e.g of creating a molecular between. Welding & repair of these parts becomes a very wise choice core supports and! That was damaged less energy to transport and distribute it a thermoset plastic, apply filler Prep Adhesion using. On a few are used on auto parts the nitrogen plastic welder bond between two compatible thermoplastics offers superior,... The symbol on the CC button to turn them on or off different applications whitens ; PET not. Chlorine how to identify plastics for welding e.g tanks, inner fender panels, water storage tanks, kayaks,,... This means that only similar plastics or the same type of plastic can be most helpful have. Of each plastic as shown in a plastic of the video will help you select the welding! Steps to ensure a proper weld plastic with heat gun before welding, mix rod completely with material!

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