Selenis SELFY MD 912 Copolyester for Tooth Brushes

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Selenis SELFY MD 912 Copolyester for Tooth Brushes
Categories:	Polymer; Thermoplastic; Polyester, TP
Material Notes:	Selenis Selfy MD 912 copolyester has been specifically developed for the production of toothbrushes. Excellent optical properties such as clarity and gloss make Selfy MD 912 the ideal choice when product and shelf appeal are essential. The mechanical properties and good chemical resistance of Selenis Selfy MD 912 allow toothbrushes to withstand the impact of the bristling process and toothpaste ingredients, granting end-users the expected durability. Toothbrushes produced with Selenis Selfy MD 912 may be colored and decorated with masterbatches and co-molded with other polymers, to suit design requirements. Selenis Selfy MD 912 is a ready-to-use product supplied with a demolding agent to ease processing. Information provided by Selenis.
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Physical Properties	Original Value	Comments

Bulk Density	0.730 g/cc
Density	1.28 g/cc	ASTM D792
Water Absorption	<= 0.12 %	ASTM D570
Viscosity Test	70 - 74 cm³/g	Intrinsic; ISO 1628-5
Linear Mold Shrinkage	0.0020 - 0.0050 cm/cm
ASTM Color	<= 1.0	b*; ASTM D6290
	>= 64	L*; ASTM D6290

Mechanical Properties	Original Value	Comments
Hardness, Shore D	77	ASTM D2240
Tensile Strength	47.3 MPa	(σm); ISO 527 -1/- 2
Tensile Strength, Yield	47.3 MPa	(σy); ISO 527 -1/- 2
Elongation at Break	76.7 %	Nominal, (εtb); ISO 527 -1/- 2
Elongation at Yield	4.2 %	(εm); ISO 527 -1/- 2
	4.2 %	(εy); ISO 527 -1/- 2
Flexural Strength	60.5 MPa	ISO 178
Flexural Modulus	1916 MPa	ISO 178
Izod Impact, Notched (ISO)	5.40 kJ/m² @Temperature -30.0 °C	ISO 180/A
	5.90 kJ/m² @Temperature 0.000 °C	ISO 180/A
	6.50 kJ/m² @Temperature 23.0 °C	50% RH; ISO 180/A
Izod Impact, Unnotched (ISO)	NB @Temperature -30.0 °C	ISO 180/A
	NB @Temperature 0.000 °C	ISO 180/A
	NB @Temperature 23.0 °C	50% RH; ISO 180/A
Puncture Energy	40.4 J	Impact Behavior, Energy Maximum Load; ISO 6603-2/3.3 m/s

Thermal Properties	Original Value	Comments
Vicat Softening Point	79.8 °C	ISO 306/A50

Optical Properties	Original Value	Comments
Haze	<= 1.0 % @Thickness 2.00 mm	ASTM D1003
Gloss	166 %	60º; ASTM D2457
Transmission, Visible	83 % @Thickness 5.00 - 6.00 mm, Wavelength 400 nm	Disk
	85 % @Thickness 4.00 mm, Wavelength 400 nm	Disk
	86 % @Thickness 2.00 - 3.00 mm, Wavelength 400 nm	Disk
	88 % @Thickness 1.00 mm, Wavelength 400 nm	Disk
	88 % @Thickness 4.00 - 6.00 mm, Wavelength 440 - 660 nm	Disk
	89 % @Thickness 1.00 - 6.00 mm, Wavelength 660 - 740 nm	Disk
	89 % @Thickness 1.00 - 3.00 mm, Wavelength 440 - 660 nm	Disk
UV Transmittance	70 % @Thickness 6.00 mm, Wavelength 370 nm	Disk
	71 % @Thickness 5.00 mm, Wavelength 370 nm	Disk
	75 % @Thickness 4.00 mm, Wavelength 370 nm	Disk
	79 % @Thickness 3.00 mm, Wavelength 370 nm	Disk
	81 % @Thickness 2.00 mm, Wavelength 370 nm	Disk
	85 % @Thickness 1.00 mm, Wavelength 370 nm	Disk

Processing Properties	Original Value	Comments
Melt Temperature	180 - 250 °C
Drying Temperature	<= 70.0 °C	to avoid chips sticking together in dryer hopper
	65.0 °C @Time 21600 - 28800 sec
Moisture Content	<= 0.0040 %	dried
Dew Point	-40.0 °C

Descriptive Properties
Particle size	320 ± 50 mg/20 chips
Pellet Shape	Cylindrical

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PSELE939 / 243437

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