Viscosity
This is the term used when viscosity decreases as shear rate increases.
What is shear thinning?
The feed throat is usually cooled to avoid premature sticking of the polymer known as this.
What is bridging?
These are the 3 steps of the thermoforming process.
What is heat the material, form the part, and then trim the part?
This is the name of the extra thickness created on the edge of cast film.
What are edge beads?
According to the song "Margaritaville," this is what Jimmy Buffett is looking for.
What is "lost shaker of salt"?
This type of viscous behavior is observed by polymers as shear rate is increased.
What is pseudoplastic?
This is what generates the heat within the extruder and melts the resin that is being conveyed through the system.
What is friction/shear?
These types of polymers are typically used because they have a larger thermoforming window
What are amorphous?
This is type of coextrusion process combines melt streams just before die exit.
What is multi-manifold?
Of the following movies (Jurassic Park, Hook, Raiders of the Lost Ark, or Jaws), this one was released in the 1980's.
What is Raiders of the Lost Ark?
Water, Milk, and sugar solution exhibit this type of viscous behaivor as shear rate increases.
What is Newtonian?
This is the area of the extruder where the majority of "melting" should occur.
What is the compression section?
Bewteen a positive and negative thermoform mold, this has a greater (larger) draft angle.
What is a positive mold?
This type of coextrusion mechanism is used when the materials have similar flow properties.
What is feedblock?
Before embarking on a solo career, Beyoncé was part of this R&B group.
What is Destiny's child?
This is value based on the time it takes for a specified mass of a polymer to flow through a specified capillary under controlled condition of temperature and pressure and can be an important measurement of viscosity.
What is the melt index?
This portion of the extruder prevents the screw from moving backwards as the pressure builds within the extruder.
What is the thrust bearing?
This type of thermoforming uses an additional structure that helps with bottom thickness when using a female mold.
What is plug assist?
This cooling mechanism on a cast film line quenches the newly produced film on BOTH sides through CONDUCTIVE cooling.
What is a 3 roll stack?
This Charles Dickens novel begins with the sentence, “It was the best of times, it was the worst of times."
What is "A Tale of Two Cities?"
According to our notes, viscosity is based on these three factors.
What is chain length, molecular weight distribution and temperature?
What is the compression section?
The is the window in which we are aiming to balance the maximum stress of the process and the maximum elongation of the part when thermoforming
What is the operating window?
In blown film, this may be utilized to improve thickness uniformity and to increase output.
What is internal bubble cooling?
This vegetable was once thought to have supernatural powers on halloween.
What is a cabbage?