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2 Review of Literature: Motorcycle helmet
Disadvantages
• Very few fibres containing microencapsulated PCM are currently available such
as acrylic and viscose.
• The fibre properties are affected if there is a very large amount of PCM in the
fibre.
2.14.6.2 Fabrics
Advantages
• Many companies can use currently available equipment using standard processes
for applying the coating containing PCM.
• A wide range of PCM concentrations can be applied as coating.
• This process is suitable for different types of fabrics such as woven, knitted,
non-woven and laminates.
• This process is also suitable for fabrics made from different types of fibres and
their blends.
Disadvantages
• Fabric properties such as drape and softness can be affected by the coating.
• The durability of washing, dry-cleaning and abrasion resistance is similar to other
types of coated fabric, which depends on the type of resin binder and the degree
of curing.
2.15 Super Absorbent Materials
Super absorbent materials are materials with very high absorbency. For example, the
chemical used in a disposable nappy is a synthetic polyacrylamide with a potassium
salt base. It is a safe, non-toxic polymer and can hold over 200 times its weight
in water. The same chemical can release water slowly over time in horticultural
applications.
2.15.1 Applications of Super Absorbent Materials
There are many applications of super absorbent materials such as disposable nappies
to absorb a large amount of water, helping babies to stay dry for a longer time. It
can be also used in buildings to cool them in summer and in clothing to cool the
wearer. Clothing containing a water-absorbent material absorbs moisture and assists
in reducing body temperature. The water-absorbent material can be applied to a
wide variety of clothing articles such as hats, headbands, wristbands, gloves, shirts,
2 Review of Literature: Motorcycle helmet
Disadvantages
• Very few fibres containing microencapsulated PCM are currently available such
as acrylic and viscose.
• The fibre properties are affected if there is a very large amount of PCM in the
fibre.
2.14.6.2 Fabrics
Advantages
• Many companies can use currently available equipment using standard processes
for applying the coating containing PCM.
• A wide range of PCM concentrations can be applied as coating.
• This process is suitable for different types of fabrics such as woven, knitted,
non-woven and laminates.
• This process is also suitable for fabrics made from different types of fibres and
their blends.
Disadvantages
• Fabric properties such as drape and softness can be affected by the coating.
• The durability of washing, dry-cleaning and abrasion resistance is similar to other
types of coated fabric, which depends on the type of resin binder and the degree
of curing.
2.15 Super Absorbent Materials
Super absorbent materials are materials with very high absorbency. For example, the
chemical used in a disposable nappy is a synthetic polyacrylamide with a potassium
salt base. It is a safe, non-toxic polymer and can hold over 200 times its weight
in water. The same chemical can release water slowly over time in horticultural
applications.
2.15.1 Applications of Super Absorbent Materials
There are many applications of super absorbent materials such as disposable nappies
to absorb a large amount of water, helping babies to stay dry for a longer time. It
can be also used in buildings to cool them in summer and in clothing to cool the
wearer. Clothing containing a water-absorbent material absorbs moisture and assists
in reducing body temperature. The water-absorbent material can be applied to a
wide variety of clothing articles such as hats, headbands, wristbands, gloves, shirts,