PSE 322 Final Exam with all Correct & 100% Verified
Answers |Actual Complete Update |Already Graded A+
ASA properties ✔Correct Answer-sizing additive
reacts really fast
liquid at room temp
AKD properties ✔Correct Answer-less reactive
waxy solid at room temp
Starch properties ✔Correct Answer-low cost
good H-bonding
makes paper stiff
microscopic parts
What is the first thing you have to do to starch before using it? ✔Correct Answer-cook it
(helps utilize its best strength performance)
How long does it take to fully cook starch? ✔Correct Answer-20 minutes
If ____ isn't cooked it acts like a ____ ✔Correct Answer-starch
filler
Two ways to cook starch ✔Correct Answer-batch cooking
jet/continuous cooking
What happens if cooked starch sits? ✔Correct Answer-Subject to retrogradation
(will crystallize)
What two things does paper strength depend on? ✔Correct Answer-1.) strength of individual
fiber
2.) strength of bonds between them
Amylose properties ✔Correct Answer-vulnerable to retrogradation
linear
Amylopectin properties ✔Correct Answer-branched
dense
does not retrograde
Why does amylopectin resists retrogradation? ✔Correct Answer-it's branched
, What two things do we want wed end starch to have? ✔Correct Answer-higher molecular
mass
cationic charge
Basic ways to increase dry strength ✔Correct Answer-increase refining
use strength agent
Tissue tear properties ✔Correct Answer-very weak paper
few fibers break
low refining
Tracing tear properties ✔Correct Answer-well bonded paper
many fibers break
highly refined
RBA is based on what? (two things) ✔Correct Answer-Tensile strength
# of fibers broken
Consequences of refining (4 things) ✔Correct Answer-interfiber bonding
slower drainage
denser, thinner paper
decreased tear strength
RBA Equation ✔Correct Answer-(s_unbonded - s_bonded)/s_unbonded
RBA can be found by what optical criteria? ✔Correct Answer-Scattering coefficient
Less light scattering = (increase/decrease) RBA ✔Correct Answer-increase
What term in the page equation can explain strength increase from the addition of cationic
starch? ✔Correct Answer-the interfacial shear strength (tau)
Ideal spot for bonding agents? ✔Correct Answer-Before fan pump in thickstock
Two limitation on cationic starch ✔Correct Answer-space
fiber surface
Relative wet strength aka "percent _____ over ______" ✔Correct Answer-wet
dry
What kind of wet strength does money need? ✔Correct Answer-high, permanent
What kind of wet strength does tissue need? ✔Correct Answer-moderate
Answers |Actual Complete Update |Already Graded A+
ASA properties ✔Correct Answer-sizing additive
reacts really fast
liquid at room temp
AKD properties ✔Correct Answer-less reactive
waxy solid at room temp
Starch properties ✔Correct Answer-low cost
good H-bonding
makes paper stiff
microscopic parts
What is the first thing you have to do to starch before using it? ✔Correct Answer-cook it
(helps utilize its best strength performance)
How long does it take to fully cook starch? ✔Correct Answer-20 minutes
If ____ isn't cooked it acts like a ____ ✔Correct Answer-starch
filler
Two ways to cook starch ✔Correct Answer-batch cooking
jet/continuous cooking
What happens if cooked starch sits? ✔Correct Answer-Subject to retrogradation
(will crystallize)
What two things does paper strength depend on? ✔Correct Answer-1.) strength of individual
fiber
2.) strength of bonds between them
Amylose properties ✔Correct Answer-vulnerable to retrogradation
linear
Amylopectin properties ✔Correct Answer-branched
dense
does not retrograde
Why does amylopectin resists retrogradation? ✔Correct Answer-it's branched
, What two things do we want wed end starch to have? ✔Correct Answer-higher molecular
mass
cationic charge
Basic ways to increase dry strength ✔Correct Answer-increase refining
use strength agent
Tissue tear properties ✔Correct Answer-very weak paper
few fibers break
low refining
Tracing tear properties ✔Correct Answer-well bonded paper
many fibers break
highly refined
RBA is based on what? (two things) ✔Correct Answer-Tensile strength
# of fibers broken
Consequences of refining (4 things) ✔Correct Answer-interfiber bonding
slower drainage
denser, thinner paper
decreased tear strength
RBA Equation ✔Correct Answer-(s_unbonded - s_bonded)/s_unbonded
RBA can be found by what optical criteria? ✔Correct Answer-Scattering coefficient
Less light scattering = (increase/decrease) RBA ✔Correct Answer-increase
What term in the page equation can explain strength increase from the addition of cationic
starch? ✔Correct Answer-the interfacial shear strength (tau)
Ideal spot for bonding agents? ✔Correct Answer-Before fan pump in thickstock
Two limitation on cationic starch ✔Correct Answer-space
fiber surface
Relative wet strength aka "percent _____ over ______" ✔Correct Answer-wet
dry
What kind of wet strength does money need? ✔Correct Answer-high, permanent
What kind of wet strength does tissue need? ✔Correct Answer-moderate
