Material: cards, add some new cards

src/Mod/Material/StandardMaterial/PA6-Generic.FCMat

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+; My new amazing material file
+; (c) 2015 Your Name (CC-BY 3.0)
+; information about the content of such cards you can find here:
+; http://www.freecadweb.org/wiki/index.php?title=Material
+
+[FCMat]
+Name = Polyamide 6
+ProductURL = https://en.wikipedia.org/wiki/Nylon_6
+YoungsModulus = 2930 MPa
+UltimateTensileStrength = 75.5 MPa
+PoissonRatio = 0.39
+CompressiveStrength = 67.6 MPa
+Density = 1150 kg/m^3
+SourceURL = http://www.matweb.com/search/datasheet.aspx?MatGUID=8d78f3cfcb6f49d595896ce6ce6a2ef1
+SpecificHeat = 1670 J/kg/K
+ThermalConductivity = 0.262 W/m/K
+ThermalExpansionCoefficient = 0.000082 m/m/K
+YieldStrength = 70.5 MPa

src/Mod/Material/StandardMaterial/PET-Generic.FCMat

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+; My new amazing material file
+; (c) 2015 Your Name (CC-BY 3.0)
+; information about the content of such cards you can find here:
+; http://www.freecadweb.org/wiki/index.php?title=Material
+
+[FCMat]
+Name = PET
+ProductURL = https://en.wikipedia.org/wiki/Polyethylene_terephthalate
+YoungsModulus = 3150 MPa
+UltimateTensileStrength = 38.8 MPa
+PoissonRatio = 0.36
+CompressiveStrength = 38.0 MPa
+Density = 1380 kg/m^3
+ShearModulus = 0.0385 GPa
+SourceURL = http://www.matweb.com/search/DataSheet.aspx?MatGUID=a696bdcdff6f41dd98f8eec3599eaa20
+SpecificHeat = 1140 J/kg/K
+ThermalConductivity = 0.181 W/m/K
+ThermalExpansionCoefficient = 0.000072 m/m/K
+YieldStrength = 62.8 MPa

src/Mod/Material/StandardMaterial/PLA-Generic.FCMat

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+; My new amazing material file
+; (c) 2015 Your Name (CC-BY 3.0)
+; information about the content of such cards you can find here:
+; http://www.freecadweb.org/wiki/index.php?title=Material
+
+[FCMat]
+Name = PLA
+Description = Polylactic acid or polylactide (PLA, Poly) is a biodegradable thermoplastic aliphatic polyester derived from renewable resources, such as corn starch, tapioca roots, chips, starch or sugarcane.
+Father = Thermoplast
+ProductURL = https://en.wikipedia.org/wiki/Polylactic_acid
+YoungsModulus = 3640 MPa
+UltimateTensileStrength = 26.4 MPa
+PoissonRatio = 0.36
+Density = 1240 kg/m^3
+SourceURL = https://www.sd3d.com/wp-content/uploads/2017/06/MaterialTDS-PLA_01.pdf
+SpecificHeat = 1800 J/kg/K
+ThermalConductivity = 0.130 W/m/K
+ThermalExpansionCoefficient = 0.000041 m/m/K
+YieldStrength = 35.9 MPa

src/Mod/Material/StandardMaterial/PP-Generic.FCMat

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+; My new amazing material file
+; (c) 2015 Your Name (CC-BY 3.0)
+; information about the content of such cards you can find here:
+; http://www.freecadweb.org/wiki/index.php?title=Material
+
+[FCMat]
+Name = Polypropylene
+ProductURL = https://en.wikipedia.org/wiki/Polypropylene
+YoungsModulus = 1470 MPa
+UltimateTensileStrength = 79.7 MPa
+PoissonRatio = 0.44
+CompressiveStrength = 10 MPa
+Density = 916 kg/m^3
+SourceURL = http://www.matweb.com/search/DataSheet.aspx?MatGUID=a882a1c603374e278d062f106dfda95b
+SpecificHeat = 1920 J/kg/K
+ThermalConductivity = 0.249 W/m/K
+ThermalExpansionCoefficient = 0.000123 m/m/K
+YieldStrength = 32.8 MPa

src/Mod/Material/StandardMaterial/PTFE-Generic.FCMat

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+; My new amazing material file
+; (c) 2015 Your Name (CC-BY 3.0)
+; information about the content of such cards you can find here:
+; http://www.freecadweb.org/wiki/index.php?title=Material
+
+[FCMat]
+Name = PTFE
+ProductURL = https://en.wikipedia.org/wiki/Polytetrafluoroethylene
+YoungsModulus = 564 MPa
+UltimateTensileStrength = 34.6 MPa
+PoissonRatio = 0.46
+CompressiveStrength = 10.2 MPa
+Density = 2070 kg/m^3
+SourceURL = http://www.matweb.com/search/datasheet.aspx?MatGUID=4d14eac958e5401a8fd152e1261b6843
+SpecificHeat = 1010 J/kg/K
+ThermalConductivity = 0.263 W/m/K
+ThermalExpansionCoefficient = 0.000108 m/m/K
+YieldStrength = 20.5 MPa

src/Mod/Material/StandardMaterial/PVC-Generic.FCMat

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+; My new amazing material file
+; (c) 2015 Your Name (CC-BY 3.0)
+; information about the content of such cards you can find here:
+; http://www.freecadweb.org/wiki/index.php?title=Material
+
+[FCMat]
+Name = PVC
+ProductURL = https://en.wikipedia.org/wiki/Polyvinyl_chloride
+YoungsModulus = 2800 MPa
+UltimateTensileStrength = 50 MPa
+PoissonRatio = 0.38
+Density = 1380 kg/m^3
+SourceURL = http://www.matweb.com/search/DataSheet.aspx?MatGUID=1f650966ec834bb8833dd4c6e3116079
+SpecificHeat = 1000 J/kg/K
+ThermalConductivity = 0.150 W/m/K
+ThermalExpansionCoefficient = 0.000075 m/m/K