Insect Resist Finishes.

Finishing of Textiles.

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 .

Introduction.

Insect resist finishes Chemical treatments

Wool

Other animal fibres

Dust mites

Allergy

AsthmaNeurodermitis

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

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 .

-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

Repeated airing Cleaning & washing

Lower room temp.

Protection.

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 .

Any questions