Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Polymer Engineering Finals > Closures > Flashcards

Closures Flashcards

1
Q

a device that
seals a product within a pack, but
which can be removed to allow the
product to be accessed

A

CLOSURES

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

any method for closing a pack so
that the product is properly
contained and protected

A

CLOSURES

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Inertness is key

A

Safety

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

closure shouldn’t interact with the container or
the product inside

A

Safety

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

must be able to withstand harsh processing
conditions like sterilization without breaking down.

A

safety

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

need resealing capabilities to
maintain protection after opening.

A

Functionality

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

provides a secure seal, safeguarding the product
from external threats like air, light, moisture, or contamination

A

Functionality

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

the closure should be easy
to remove, even for those with limited hand strength or dexterity

A

User-friendliness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

features become essential for products that could be harmful if
ingested accidentally

A

Child-resistance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

should integrate seamlessly with
existing production lines for efficient filling and packaging

A

Production and Environmental Considerations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

closures should cost-effective to produce and utilize minimal materials

A

Production and Environmental Considerations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

should be recyclable to minimize
environmental impact

A

Production and Environmental Considerations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

push in closures and push on closures

A

PUSH-FIT CLOSURES

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

the closure is
pushed in the open neck of the container

A

Push-in closures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

a
wine bottle cork, or the lever lid used on paint cans

A

Push-in closures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

those in which the closure is
pushed on or over the outside of the top of the
container

A

Push-on closures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

the metal lid on a tin of biscuits or the
plastic overcap sometimes supplied as a resealable
feature on containers for dry products such as
ground coffee.

A

Push-on closures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

closures rely on compression

A

PUSH-IN STYLE
wine bottle corks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

The wine bottle cork material, typically natural cork or _________, squishes against the smooth glass
container neck to form a tight seal.

A

low-density
polyethylene (LDPE)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Wine Bottle Corks seal is further
improved by features like ___________ which create mini-seals as they press against the glass

A

fins or ridges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

In PUSH-IN STYLE, the container itself can also contribute to a better seal
with a slightly ___________ and a ________ neck that
gets narrower towards the bottom.

A

rough surface , tapered

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

these lids rely on a tight fit achieved by
pressing the lid rim onto the container neck

A

Pry-off Lids (Push in style)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Both
the lid and container need to be rigid enough to
handle this pressure without deforming.

A

Pry-off Lids (Push in style)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

in pry-off lids, the _______ of the contact
surfaces need to be precise for a good seal.

A

size and angles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

These closures,
common for containers like cocoa powder, use the
compressibility of LDPE to create a seal

A

Push-in Plastic Closures for Dry Products

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Push-in Plastic Closures for Dry Products type of polymer

A

LDPE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

since in Push-in Plastic Closures for Dry Products, containers are often flexible plastic themselves, the
seal wouldn’t be airtight, therefore _______ is added

A

aluminum foil
diaphragm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

provide a true airtight seal
and tamper evidence

A

aluminum foil
diaphragm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

also called press-on closures

A

PUSH-ON STYLE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

offer a
balance of speed and ease of use in manufacturing and
application, allowing for fast filling and sealing

A

PUSH-ON STYLE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Push on style in toiletries and household chemicals, where products are
opened and closed frequently, __________ is preferred for
its superior resistance to flexing.

A

polypropylene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

In toiletries and household chemicals, where products are
opened and closed frequently

A

PUSH-ON STYLE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

simplest, featuring a metal-rimmed
lid placed on a metal container

A

Slip Lids (PUSH-ON STYLE)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

While
easy to produce, the seal isn’t very tight to allow for easy
opening

A

Slip Lids (PUSH-ON STYLE)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

unsuitable for moisture-sensitive
products, which might require additional inner wrapping like
plastic film for proper preservation.

A

Slip Lids (PUSH-ON STYLE)

36
Q

require good stretch in
the closure material to form a tight seal around the
container neck

A

Push-on Plastic Closures

37
Q

______ excels in Push-on Plastic Closures
due to its high elongation properties

A

Low-density polyethylene

38
Q

The container
typically has a rounded lip for easy removal and refitting
of the closure, and sometimes a locating ring for stability.

A

Push-on Plastic Closures

39
Q

requires additional features like aluminum foil diaphragms for
extended shelf life and tamper evidence

A

Push-on Plastic Closures
push-in plastic closures

40
Q

These closures, often
used for baby food, combine a tinplate shell with a
soft, injected thermoplastic sealing compound

A

Push-on, Twist-off Closures

41
Q
  1. product is filled hot into a glass container with an interrupted thread.
  2. As the product cools, a vacuum
    forms    , pulling the closure down for a tight seal.
  3. The heated liner conforms to the threads during this process.
  4. Finally, a capping machine applies torque to
    ensure a secure seal.
  5. Consumers open the container by unscrewing the closure
A

Push-on, Twist-off Closures

42
Q

The number of turns a thread makes in SCREW THREADED CLOSURES

A

Thread Engagement

43
Q

affects the tightness of the
seal. More turns generally create a stronger seal but
require more effort to apply

A

Thread Engagement
SCREW THREADED CLOSURES

44
Q

he shape of the threads on the closure needs to match the shape
of the threads on the container neck.

A

Thread Profile
SCREW THREADED CLOSURES

45
Q

This shape of SCREW THREADED CLOSURES ensures a
proper fit for a good seal.

A

Thread Profile

46
Q

for thread profile, A popular option for plastic
containers is the ______, which offers a
balance of strength, smooth opening, and sealing ability

A

modified buttress profile

47
Q

These include a pre-inserted wad (is this the paper) that acts as a seal
between the container top and the closure’s inner
surface.

A

WADDED CLOSURE

48
Q

In WADDED CLOSURE, when the closure dimensions are at
the minimum of the specification, and
the container dimensions are at the
__________, the closure can still be
easily applied to the container

A

maximum

49
Q

Designed for lower cost, these closures rely on a
ring inside the closure that fits into the container
neck to create a seal.

A

LINERLESS CLOSURE

50
Q

LINERLESS CLOSURE
for single use

A

High-density polyethylene (HDPE)

51
Q

LINERLESS CLOSURE
for multiple use

A

polypropylene (PP)
-due to deformation

52
Q

These are often used with
screw caps for tamper evidence and added
security.

A

Membrane Seals
SCREW THREADED CLOSURES

53
Q

Membrane Seals
SCREW THREADED CLOSURES uses

A

Heat fuses a polyethylene layer

54
Q

combines a wad with a foil membrane loosely
attached. (keeping the wad for resealing)

A

Combined wad and membrane

55
Q

Twist-off metal lug closures, often called
“White caps”

A

Lug closures with ipit

56
Q

they require less than one
turn (usually under 90°) to apply and
remove

A

Lug closures

57
Q

These are widely used on bottles of beer and are
typically made from heavy gauge metal

A

CRIMPED CROWN CORK CLOSURE

58
Q

heavy metal used in CRIMPED CROWN CORK CLOSURE

A

tin-free steel

59
Q

designed for glass bottles containing
carbonated drinks. Their high seal integrity prevents
air from entering or carbonation from escaping,
maintaining product quality

A

CRIMPED CROWN CORK CLOSURE

60
Q

Typical lidding materials include aluminum foil, paper,
metalized PET, or PP, often used in combination

A

PEELABLE SEALING LIDS

61
Q

PEELABLE SEALING LIDS
materials

A

aluminum foil
paper
metalized PET, or PP

62
Q

Close attention to dimensional
tolerances is essential, starting at the design stage and
considering the container it will seal

A

Dimensional Accuracy

63
Q

Samples are checked for conformance to
specifications, including dimensions, presence of liners (if applicable), and liner retention

A

Sample Inspection

64
Q

The fit between closure and container for proper
seal efficiency is verified before full-scale manufacturing.

A

Fit Testing

65
Q

In fit testing, Techniques like using _________ on the container’s sealing
surface can help visualize contact between the closure and
container

A

colored dye

66
Q

Tests are conducted to ensure the closure effectively contains and preserves the product. This
may involve weight or volume checks after storage (potentially under extreme temperature and humidity) or even microbiological testing.

A

Product Containment

67
Q

Closures are evaluated for their intended
functions, such as ease of opening, dispensing the correct amount of product, and reclosing.

Ideally, these tests are conducted under real-world usage conditions, like testing a shower gel closure in a shower environment. Consumer usage trials can provide valuable insights but add time and cost to development

A

Usability Testing

68
Q

Manufactured closures are checked
against specifications for dimensional accuracy, visual
aspects like surface defects (flashing, injection points,
unfilled areas), and color consistency.** (overall)**

A

Closure Inspection

69
Q

used to check seal
efficiency on the packaging line. These might include inverting
filled packages or subjecting them to a squeeze test. Height
detection systems may also be used

A

On-Line Testing

70
Q

involve
measuring the torque required to remove the closure (take off torque) and Statistical testing is performed

A

Off-Line Testing

71
Q

Also indicates when an unauthorized access to
the protected object was made

A

TAMPER EVIDENT

72
Q

types of TAMPER EVIDENT

A

1) Roll-on Pilfer Proof (ROPP) metal closures
2) Plastic tamper evident closures
3) Shrink seals or bands
4) Adhesive labels or tapes

73
Q

High demand in liquor, medical, pharmaceuticals,
beverages, food, agrochemicals, edible oil, lube oil and
misc. industrie

A

Roll-on Pilfer Proof (ROPP) metal closures
tamper evident

74
Q

uses rollers to apply force around the
cap and form threads around the bottle

A

Roll on

75
Q

to steal in small amounts

  • made of soft-temper aluminum with a partially
    perforated ring (or skirt) at its lower edge.
A

Pilfer

76
Q

When the closure is unscrewed, the perforated
ring should _________, leaving clear evidence of
opening

A

fall away

77
Q

This closure with perforated ring or skirt is
screwed downwards and then pushed to make it
stationary.

A

Plastic tamper evident closures

78
Q

Opening the container breaks the
perforations and allows the cap to
be removed, leaving the ring in
place.

A

Plastic tamper evident closures

79
Q

These are cylindrical sleeves of plastic film,
placed loosely over a filled and sealed pack and
then shrunk in place using heat

A

Shrink seals or bands

80
Q

Self-adhesive substrates or ungummed
substrates applied using adhesive applicators,
either across the junction of a bottle/jar and its
closure, or across the flaps of cartons

A

Adhesive labels and tapes

81
Q

Applies the principle of having to carry out two
different actions at the same time, which is
generally not intuitive for young children

A

CHILD RESISTANT

82
Q

ex of CHILD RESISTANT

A

Push down and Turn
Squeeze and Turn

83
Q

controlled dispensing of a container’s contents

A

Flip top closures
(DISPENSING AND METERING)

84
Q

Flip top closures made of _________ which can create a flexible hinge that does not break with repeated use

A

polypropylene

85
Q

used on containers of liquids to help consistent dispensing.
Some are metered to provide uniform usage

ex. spray pumps

A

Dispensing pumps

Polymer Engineering Finals (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions