Emissivity Of Plastic Sheet

The emissivity information was determined under ideal conditions.

Emissivity of plastic sheet.

A diversity of applications from electrical inspections thermal environmental studies to building roof thermography ir refractory evaluations to inspecting mechanical systems process monitoring and control to equine thermography horse thermography infrared condition monitoring to non destructive testing to research and development from security and surveillance to building diagnostics. For example a plastic material with emissivity 0 92 has reflectivity 0 08. Emitted energy indicates the temperature of the object. Need the emissivity of different and specific materials.

Note that the emissivity coefficients for some products varies with the temperature. Additionally thin sheets of material such as plastics may be semi transparent in the infrared and therefore have reduced emissivity. To optimize the surface temperature measurement of a material. Surface contamination such as dust oil films or other agents will affect the actual emissivity of your material.

The emissive and reflective behavior of most materials is similar in the visible and infrared regions of the electromagnetic spectrum. A range of emissivity values is usually given for many materials whose emissivity can be affected by surface roughness or finish. A range of emissivity values is usually given for many materials whose emissivity can be affected by surface roughness or finish. If reflectivity increases emissivity must decrease.

The emissivity coefficient ε indicates the radiation of heat from a grey body according the stefan boltzmann law compared with the radiation of heat from a ideal black body with the emissivity coefficient ε 1. Emissivity can have a value from 0 shiny mirror to 1 0 blackbody. Emissivity values of common materials material emissivity aluminum polished 0 05. Emissivity values for common materials.

Black plastic 0 95 enamel 0 90 formica 0 93 frozen soil 0 93 glass 0 92 glass frosted 0 96 gold polished 0 02 ice 0 97 iron hot rolled 0 77 iron oxidized 0 74 iron sheet galvanized burnished 0 23 iron sheet galvanized oxidized 0 28 iron shiny. To optimize the surface temperature measurement of a material. The total emissivity for metals non metals and common building materials are given. Additionally thin sheets of material such as plastics may be semi transparent in the infrared and therefore have reduced emissivity.

The emissivity coefficient ε for some common materials can be found in the table below. Since the emissivity of a material will vary as a function of temperature and surface finish the values in these tables should be used only as a guide for relative or delta measurements. A polished aluminum surface with emissivity 0 12 has reflectivity 0 88. Most organic painted or oxidized surfaces have emissivity values close to 0 95.

A material with an emissivity value of 0 would be considered a perfect thermal mirror.