Main Points.
Introduction . -1 Mechanisms of Insect Resist Finishes. -2
Chemistry of Insect Resist Finishes . -3����Application of Insect Resist Finishes . -4�ُEvaluation of Insect Resist Finishes . -5
Troubleshooting for Insect Resist Finishes . -6
7 -Dust mites .
The clothes moth
Brown house moth
Keratin-digesting pests Carpet
beetle
Fur beetle
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 .
The carpet industry . -1
The carpet industry. -1
2-Floor coverings .
3 -blankets&uniforms.
4-upholstery fabrics
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 .
-Control agents . Nerve Poisons
-Affecting a broader range of insects
-More rapidly biodegraded than poisons.
-Less durabillity.
Chemistry of insect resist finishes.
Chlorinated triphenyl methaneFlucofenuron
slucofenuron chlorphenylids
Dieldrin. 1 -One of the original nerve
poisons.
Permethrin .
2-Higly toxic to
mammals.3 -Banned in most countries
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.
Insect resist finish During spining
During scouring
During Dyeing
During dyeing -The best light and wet fastness properties The finish is able
fully penetrate the fibres
-cholrphenylid drivatives .
-Exhaust well to nylon .
-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.
Dust mites
Pillows ,bedding and quilts.
upholstery
carpetsMattresses
Protection from dust mites.
Bed covers
Similar textiles
Sheeting
Tight woven fabrics .
- 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 .