5Fur beetle Carpet beetle Keratin-digesting pestsCarpet beetleThe clothes mothBrown house mothMoth populations can increase dramattically in arelatively short time .
6The carpet industry. -1 2-Floor coverings . 3- blankets&uniforms . - Various chemicals have been used to control damage from larval attack on woolThe carpet industryInsect resist finishes .The carpet industry2-Floor coverings .3- blankets&uniforms .4-upholstery fabrics
7Mechanisms of insect resist finishes . PoisonsNerve poisons
8Poisons - 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 .
9Nerve Poisons- Control agents .-Affecting a broader range of insects-More rapidly biodegraded than poisons .-Less durabillity .
10Chemistry of insect resist finishes . FlucofenuronChlorinated triphenyl methaneslucofenuronchlorphenylids
11Permethrin . Dieldrin . 3- Banned in most countries 1- One of the original nerve poisons.Permethrin .1- very effective against moth larvae.2-Less effect on Anthrenus beetles.2-Higly toxic to mammals.3- combination products of permthrin and hexahydropyrimidine derivatives.3- Banned in most countries
12Application of insect resist finishes. During spiningDuring DyeingDuring scouring
13During 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 .
14During 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 .
15During 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 .
17Troubleshooting .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 .