Remove, Repair, And Install Plastic Panels And Components Flashcards
When working with plastic obtainable and read the following
- SDS information, warning labels attached to plastic repair products, and repair procedures and safe handling information
- SDS information
- Warning labels attached to plastic repair products
- repair procedures and safe handling information
SDS information, warning labels attached to plastic repair products, and repair procedures and safe handling information
Some plastic repair adhesive contain isocyanates
True
False
True
Thermoplastic
Plastic that will melt
Thermoset plastic
Plastic that will not melt
Thermoset plastics include
- urethane based
- Polyester based
- Both
- neither
Both
Olefin plastic are all except
- referred to as problem plastics
- can be difficult to bind to
- thermoplastic
- thermosetting
Thermosetting
Produce a messy smear when ground
Thermoplastic olefin plastic
Grind clearly producing a fine powder
Thermoset plastic
Produce clumps of shredded molten plastic fragment when ground
Thermoplastic non olefin plastics
During a float test thermoplastic will float
True
False
True
The following are two types of surface contaminants
- water and solvent soluble
- water and wax and grease remover
- thermoplastic and thermoset
- olefin and non olefin
Water and solvent soluble
Surfaces must be properly cleaned prior to performing plastic repairs to
- ensure proper adhesion
- keep technicians busy
- help identify damage
- help keep the shop clean
Ensure proper adhesion
Urethane plastics have no memory and cannot be reshaped with application of heat
True
False
False
Depending on the thickness of the material repair taper should be
3-8 mm
Avoided
13-26mm
V-grooved
13-26mm
It is crucial to properly support and align the plastic part being repaired
To ensure the part does not change from its original shape
To keep that part off of the floor
So that technician do not have to bend down
Because heat from welding will cause the repair area to expand
To ensure the part does not change from its original shape
Adhesive should be applied
- in 2 stages: a thick coat to achieve bind line thickness, then a skin coat to ensure good penetration
- in 2 stages: a thin skin coat, then a thicker coat as required
- in one application to ensure a speedy repair
in 2 stages: a thin skin coat, then a thicker coat as required
Because of the multitude of products available, it is important to
- combine the products you like to work with
- read and fully understand the products usage and application procedures from any adhesive product, as they are pretty much all the same
- use a backing strip no matter what the repair.
- read and fully understand the products usage and application procedure.
Read and fully understand the products usage and application procedure
Most adhesive have a
5 day shelf life
1 year shelf life
5 year shelf life
1 month shelf life
1 year shelf life
What type of plastic repair requires reinforcement regardless of the size of repair
ABS
Olefin
Polycarbonate
SMC
SMC
When repairing cracks, drill 3mm ( 1/8” ) holes at the end of each crack prevent
Adhesion
Adhesive failure
Shrinkage
Further cracking
Further cracking
Which is NOT true about heat curing adhesives
- improve adhesion
- Reduces sand scratches
- Speed up the repair
- Eliminate the need for sanding
Eliminate the need for sanding
Which of the following is NOT a resin type for plastic adhesive
Urethane base
Hydro base
Acrylic base
Epoxy based
Hydro base
Generally, tab repairs can be accomplished
Plastic welding
Use of adhesive
Both
Neither
Both
Plastic should not be heated to over 66•C ( 150•F ) because
- some plastic melt above that temperature
- adhesive will dry too fast
- the paint on the bumper could catch fire
- heat lamps will not heat over 66•C ( 150•F )
Plastic should not be heated to over 66•C ( 150•F ) because
