Finishing of Textiles
Insect Resist Finishes
Main Points .
1-Introduction .
2- Mechanisms of Insect Resist Finishes.
3-Chemistry of Insect Resist Finishes .
Application of Insect Resist Finishes .
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45-Evaluation of Insect Resist Finishes .
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67--Troubleshooting
for Insect Resist Finishes .
Dust mites.
Introduction .
Insect resist finishes
Chemical treatments
Wool
Other animal fibres
Dust mites
Allergy
Neurodermitis
Asthma
Fur beetle
The clothes moth
Keratin-digesting
pests
Carpet beetle
Brown house moth
Moth populations can increase dramattically in
arelatively short time .
- Various chemicals have been used to control damage
from larval attack on wool
Insect resist
finishes .
1-The
carpet
industry.
1-The
carpet
industry .
2-Floor coverings .
3- blankets&uniforms .
4-upholstery fabrics
Mechanisms of insect resist
finishes .
Insect resist finishes
Poisons
Nerve poisons
Poisons
- Interfere with the
keratin digesting process
of the larvae.
- Killing the feeding larvae .
- By blocking enzymes need
for digestion.
-lower environmental hazard than nerve
poisons.
-Not effective against some pests .
Nerve Poisons
- Control agents .
-Affecting a broader range of
insects
-More rapidly biodegraded than poisons .
-Less durabillity .
Chemistry of insect resist finishes
.
Flucofenuron
Chlorinated triphenyl methane
slucofenuron
chlorphenylids
Dieldrin .
1- One of the original nerve
poisons.
2-Higly toxic to mammals.
3- Banned in most countries
Permethrin
1- very effective
. against
moth larvae.
2-Less effect on Anthrenus
beetles.
3- combination products of
permthrin and
hexahydropyrimidine
derivatives.
Application of insect resist finishes.
During Dyeing
Insect resist finish
During scouring
During spining
During dyeing
- The best light and wet fastness properties
The finish is able fully
penetrate the fibres
-Exhaust well to
nylon.
-cholrphenylid drivatives.
-Leaving wool
unprotected.
-Permethrin-based products .
- Distribute them selves more
uniformly between two fibres .
During Scouring .
-For carpets, blankets &upholstery.
-Do not completely penetrate the fibres.
- Lower temperatures & shorter time for
treatment in process .
- So fastness properties are not
durable .
During Spinning .
- Combine the finish with spinning lubricants .
-Then to apply the combination to loose wool
prior to spinning
-Produces yarns with only superficial treatment .
- Much lower fastness .
Evaluation.
Microscopic methods
Measure the weight loss of the treated fabrics
Measure the weight of insect excrement .
Troubleshooting .
1-Exposure to light , dry cleaning and shampooing
can reduce the effectiveness of finish .
2- Finish baths that are not completely
depleted of insect finishes.
3-Special are must be taken to prevent release
of these insect poisons to the environment .
Finishes for protection from dust mites .
Pillows ,bedding and
quilts.
upholstery
Dust mites
Mattresses
carpets
Lower room temp.
Protection.
Repeated airing
Cleaning & washing
Protection from dust mites.
Bed covers
Sheeting
Tight woven
fabrics .
Similar textiles
- Micro encapsulation is another interesting possibility for
application.
Conclusion .
Insect resist finish .
Mechanisms of insect resist finishes .
Chemistry of insect resist finishes .
Application of insect resist finishes .
Evaluation of insect resist finishes .
Troubleshooting of insect resist finishes .
Dust mites .
Any questions