What are the best methods to choose the proper plastic sheet substance? Utilize the tools that most professionals use to locate the best plastic material for their application.
Where You Should Begin The process of picking the proper plastic material starts with ascertaining the' is indispensable' physical properties needed for your application. Designing POM-C Acetal Sheet a part with the minimum performance factors in psyche will help to eliminate an overly expensive proportion. Critical factors to consider are: Temperature needs (short term and long term) Enviromental or Chemical Needs UV resistance (Will it be in direct sunlight) Colors or Transparency Strengths (Impact and Compression) Compliance Issues (Certification for FDA, NSF, Dairy, etc .) Review The Plastic Property Comparison Guide The first tool suggested is a map produced by the IAPD (International Association of Plastic Distribution - http:// iapd.org /) related in depict below, and listed on the following chart are the most common plastic sheet and plastic rod substances that are commonly available. In addition, the following chart compares the physical properties of these common plastic materials. Click on depict to access chart. IAPD Plastic Selection Rectangle Chart Included in this chart is a relative cost comparison, which will assist in limiting the materials to proper plastics for a application without over-designing and using an expensive' over kill' substance. Some common plastic sheet materials can be very expensive. Engineering Grade Plastic like PEEK (Polyetheretherketone) can be in the $100 per pound or more. Begin The Search With Temperature Resistance After appearing over the IAPD Physical Properties Chart , now it is time to evaluate specifics for your application. The crucial factor listed above are ranked by most important to least important. If your proportion needs to handle a continuous temperature of 300 degrees F, this is a critical physical property. Picking training materials that softens at 250 degrees is a recipe for disaster. Pick training materials that can handle the temperature first. Will Your {Desired End Part|Part| Have Chemical Exposure Next, look at environmental requirements. Parts exposed to chemicals are important to research. Find the compound make up and the concentration of the compound to insure the material you pick can handle this solution. Many plastics have excellent chemical opposition as evidenced by evaluating the container the chemicals are stored in already. A common plastic the hell is chemical resistant is Polypropylene, the same material used for automotive batteries. While Polypropylene and HDPE sheets are excellent in compound resistance, their temperature scope is quite limited. Also, these two plastics can not be readily bonded or glued, and would require hot welding for assembly. Will Your Part Need To Be Protected From The Sun Most plastics do not manage long exposure to direct sunlight without an additional UV additive. The one exception is Acrylic, which is the most UV resistant plastic sheet available. Some plastics manage UV well if they have a carbon black additive, or a extra UV package added at day of production. How Critical Is The Color The most frequent colours in many plastic sheets are Natural( white to tan) and Black. While other colors are available with a special run, this may require a large minimum order. Some plastics, like HDPE are available in many colours and textures for use in marine, playground and food processing applications. In many plastic applications, a machined proportion is being induced, and the coloring is the least important factor. If it is an internal part of a machine , no one truly cares about the color of the proportion. Some patrons look for substances in a particular colour to assistance' brand' their components for easy replacement and identification. How Much Stress Will The Part See Strength is a wide range of physical properties encompassing many stresses a part may be exposed to. From impact to compressing, expansion to tensile strength, all of these POM-C Acetal Sheet can be critical in designing a plastic part. There are other factors in the' Strength' realm, like Notched Izod and Stress Can Cause Your Plastic Part to Bow, Twist and Crack, water absorption. If your proportion will be exposed to crushing pressure, pulling apart force or impact, these are critical things to consider prior to picking your plastic portion. PTFE is a soft and slippery plastic, but will' cold flow' under high pressure, and High Pressure Laminates like G-10 FR 4 sheet can withstand some of the most important one pressures. The Notched Izod exams for materials that transgress easily if a scored recognize has been built in the surface. Acrylics violate very easily if scored, but UHMW will not break at all under the same test. What Agency Approval May Be Required In many applications a part may require approval or testing to meet a third party certification. One such common application is for substances in meat processing applications. Common requests included UL ratings, Fire Ratings, Military specifications and many more. Food contact is a popular request, embracing material that is either FDA( Food and Drug Administration) or NSF( National UL Ratings for Plastic Materials Sanitation Foundation) approved. These bureau insure that substances are rigorously tested and comply with their requirements for safety. Some common materials used in meat processing that fulfills the FDA certification are Delrin- Acetal, HDPE, UHMW and Nylon, plus many others. Once these steps have been completed, several substances should present themselves as meeting your criteria and physical property requirement. Unfortunately there is no one perfect plastic that works in all applications. However, for almost every application, there is a material that will work,
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