tm
Co-efficient of linear thermal expansion eg; pvc .000035 per inch
per degree of temperature change from ambient F.
The hardness of plastic measured by the resistance of indentation.
Shore A used for softer plastics and Shore D for harder plastics.
An ease of flow measurement for a thermoplastic. Defined as the
mass of plastic in grams flowing in 10 minutes through a specific orifice.
A physical property and measurement of the relative impact
strength of different materials using a drop dart impact tester.
A substance added to plastic materials to increase softness or flexibility.
Horizontal or longitudinal lines or marks on the extruded surface.
The physical property and measurement of a materials relative
stiffness to deflection under pressure.
Pulling the extrusion from the die at a linear speed higher than that at
which the material is naturally emerging from the die.
The stretching of plastic material.
- Materials that become soft when heated and solid when cooled over
and over again. Think of ice turning to water and back to ice when cooled.
Materials that experience a chemical change during processing that become
solid and stay solid even if heated again.
Flexible materials that can be stretched up to double their length at room
temperature and return to their original length when released.
Stronger and stiffer materials that process at a higher temperature
with a narrow window from solid to liquid. Eg; polyethylene and nylon
Unorganized polymer chains that melt at lower temperatures gradually.
Eg; pvc, abs and styrene. Not as strong and stiff as crystaline.
The hardness of plastic measured by the resistance of indentation.
Shore A used for softer plastics and Shore D for harder plastics.
An ease of flow measurement for a thermoplastic. Defined as the
mass of plastic in grams flowing in 10 minutes through a specific orifice.
A physical property and measurement of the relative impact
strength of different materials using a drop dart impact tester.
A substance added to plastic materials to increase softness or flexibility.
Horizontal or longitudinal lines or marks on the extruded surface.
The physical property and measurement of a materials relative
stiffness to deflection under pressure.
Pulling the extrusion from the die at a linear speed higher than that at
which the material is naturally emerging from the die.
The stretching of plastic material.
-
Materials that experience a chemical change during processing that become
solid and stay solid even if heated again.
Flexible materials that can be stretched up to double their length at room
temperature and return to their original length when released.
Stronger and stiffer materials that process at a higher temperature
with a narrow window from solid to liquid. Eg; polyethylene and nylon
Unorganized polymer chains that melt at lower temperatures gradually.
Eg; pvc, abs and styrene. Not as strong and stiff as crystaline.
CLTE
Durometer
Melt Index
Impact Strength
Plasticizer
Die Lines
Flexural Modulus
Drawdown
Elongation
Thermoplastic
Thermoset Plastic
Elastomer
Crystalline Plastic
Amorphous Plastic
Durometer
Melt Index
Impact Strength
Plasticizer
Die Lines
Flexural Modulus
Drawdown
Elongation
Thermoplastic
Thermoset Plastic
Elastomer
Crystalline Plastic
Amorphous Plastic
Common plastic terms
