First, anti-mosquito finishing agent examples

Combining nearly 20 years of functional textile finishing experience, the company has developed and produced insect-resistant finishing agent AI. At present, the product is widely used in anti-mosquito finishing of various textiles, and the killing rate of mosquitoes is high and the effect is long-lasting.

The insect-proof finishing agent AI is a new fabric functional finishing agent, and its main component is a nano-scale microcapsule mainly composed of pyrethroid compounds. It forms an insect-repellent film on the surface of the fabric through a fixing agent, and has an efficient and rapid knockdown killing effect on mosquitoes, flies, cockroaches, cockroaches, mites, etc., and has a good repellent effect. Insect-resistant finishing fabrics can be widely used in decorative fabrics for bed textiles, carpets, mosquito nets, curtains, and other summer textiles and military textiles such as socks and clothing.

The appearance of the insect-proof finishing agent AI is white emulsion, the active ingredient content is 20%, it is easy to disperse in water, and is basically non-toxic to humans and animals. The pH of 10% solution is 6.5-7, which can be mixed with various low-temperature interlinked resins. Mixtures and softeners work together, but are not suitable for high temperature treatments above 120 °C. The finished fabric died immediately after contact with mosquitoes for 30 seconds, and the housefly died immediately after 15 seconds of contact. The Aedes aegypti test protection rate was 98%, and the contact tube method experiment was performed for 5 minutes. More than 90% of Culex pipiens pallens were knocked down, and the mites and cockroaches were licked. The killing mortality rate of cockroaches is 100%, and there is no adverse effect on fabric appearance and physical indicators. After washing 15 times, it still has good anti-mosquito effect, and the mortality rate of mosquitoes, flies, cockroaches, cockroaches and mites still exceeds 80%. The insect-proof finishing fabric is non-irritating and non-allergic to the skin, non-toxic to the human body and comfortable to wear.

Instructions for use:

1, process formula

Concentration (g/l) fabric

Agent

Cotton, polyester cotton,

Silk, wool fabric

Chemical fiber nets,

sock

Insecticide finishing agent AI

30-50

100-150

Low temperature fixing agent SCJ-939

30-35

90-100

2, chemical operation (to prepare 500 liters of solution for example)

First, add 300-400 liters of water into the chemical tank, stir, add the insect-proof finishing agent AI, then add the low-temperature fixing agent SCJ-939, add water to 500 liters, and continue to stir.

3. Process flow:

Dipping → dehydration (the solution can be reused)

Fabric drying (70-100 ° C, without padding finishing solution (rolling rate 70 - 80%)

Water content is degree → bake (120 ± 2 ° C, 30 seconds, or 108 ± 2 ° C, 2 minutes) → finished product

Second, the impact of different process conditions on fabric repellent performance

1, process experiment

Application process experiments were carried out on mosquito repellents of different fabric concentrations.

Process recipe:

Process flow:

Two dip two rolling (rolling rate 70%) → drying (70-100 ° C × 3 min) → baking (110 × 30 min)

2, mosquito repellent performance test

(1) Forced contact test

Refer to the cylinder method specified by WHO, cut the anti-mosquito finishing cloth into 12.5×16cm, make the area 200cm2, then lining it with filter paper, fixing the four corners with staples, rolling into a cylinder and putting it into the contact cylinder, then feathering After 5-7 days, 20 female Culex pipiens and housefly (male and female) were placed in the contact cylinder, and the number of knockdowns was observed every 5 minutes. The observation was continued for 30 minutes, and each experiment was repeated twice. And set a blank control group. After the test, the test insects were moved to a clean cage and placed in the breeding room for 24 hours to record the number of deaths.

The test results are as follows:

The number of Culex pipiens in different times

(minutes) knockdown rate%

24-hour mortality%

% knockdown rate for housefly at different times (minutes)

From the above results, it can be seen that Formulation 1 has the worst knockdown killing effect, mainly because the concentration of AI of mosquito repellent is low. It can be seen from the test results that the concentration of anti-mosquito AI should not be lower than 30g/l.

(2) Repellent test

Select a number of young men and women, the cloth tightly wrapped above the wrists of the subjects, respectively, to the Aedes aegypti (about 2,000 adult mosquitoes in each cage) for 4-5 days of emergence, and park for 2 minutes, observe the stop and bite Number, and set a parallel blank control group.

Number of mosquito bites in the blank group - number of mosquito bites in the anti-mosquito group

Effective protection rate = × 100%

It can be seen that the repellent effect is better when the insecticide AI concentration is higher.

3, washing resistance test

Note: The experiment is to use a glass funnel with a diameter of 9cm, directly fixed on the cloth, put 15 non-blooded adult mosquitoes in each bucket, start counting the number of knockdown mosquitoes on time, and transfer to the recovery cage after 10 minutes, check after 24 hours. mortality rate. KT50 is knocking down half of the time.

4, detection effect

The research team made the mosquito repellent-made textiles into curtains, sheets, skirts, shorts, etc., which were put on trials by troops, hotels and experimenters. They generally reflected that they were comfortable to wear, had significant effects on preventing mosquito bites, and no skin allergies were found. And other adverse reactions. It has a significant effect on killing indoor mosquitoes and flies.

After testing, the fabrics prepared by the insect repellent AI have high-efficiency and rapid knockdown and killing and repellent effects on mosquitoes and flies; the protection rate for human skin is 100%; the knockdown rate for Culex pipiens pallens is 100%, The contact experiment has a mortality rate of 100%, and has good washing resistance, no allergic reaction to the skin, soft hand feeling and comfortable wearing.

[China Antibacterial Fabric Network ]