CN103194911B - One kind repellent fabric and preparation method - Google Patents

Abstract

The present invention discloses a repellent fabrics in the field of outdoor products, comprising a base fabric and a polyurethane layer of microcapsules located on the base fabric surface, the microcapsule coating is a polyurethane microcapsules formed of a polyurethane, said polyurethane microcapsules are polyurethane latex particles, and latex particles coated with the polyurethane in the configuration of a pesticide. The technical effect is: can slowly release pesticides, insect repellent effect is good, long life, repeatedly washed with water, insect repellent effect will not be decreased, and less damage to the human body. The present invention also discloses a method for preparing a repellent fabric supplies outdoor sector, comprising the steps of: preparing polyurethane microcapsules step, the step of preparing the coating liquid and the microcapsule finishing step.

Description

One kind repellent fabric and preparation method

FIELD

[0001] The present invention relates to the field of outdoor products and a method for producing a repellent fabric repellent fabric.

Background technique

[0002] all over the world are plagued by mosquitoes, China's subtropical. This problem is also quite prominent. Meanwhile, malaria and mosquitoes or other pathogens communicator. Thus, to find an appropriate and effective means of mosquito is very urgent. World Health Organization has proposed to ITNs, can only passively prevent mosquito infestation. Further, the fabric using immersion short duration insecticidal effect, a significant decline in efficacy after washing with water, immersed again required. This will not only trouble the addition of drug consumption Qi U, low efficiency, and environmental pollution on the human body there are potential damage.

SUMMARY

[0003] The object of the present invention is to overcome the deficiencies of the prior art, there is provided a repellent fabric, capable of controlling release rate of the pesticide to the surface to repel mosquitoes, has good durability and repellent effect, and not easy to cause damage to the human body. Accordingly, the present invention also provides a method for preparing a repellent fabric.

[0004] The technical solution to achieve the above object is: A repellent fabric comprising a base fabric and a polyurethane layer of microcapsules located on a surface of the base body of the fabric, the polyurethane coating is a polyurethane microcapsules composed of microcapsules of the polyurethane microcapsules are polyurethane latex particles, and latex particles coated with the polyurethane in the configuration of a pesticide.

[0005] Further, the pesticide is a pyrethroid insecticide.

[0006] Further, the base fabrics of cotton fabrics, ramie fabrics, polyester fabrics, nylon or acrylic fabrics.

[0007] Another aspect of achieving the above object is: a process for preparing a repellent fabric, comprising the steps of:

[0008] Polyurethane microcapsules prepared steps of: polyethylene glycol and diisocyanate as raw material, a polycondensation emulsion, and dispersing agents and insecticides added during the polycondensation of the emulsion, to give a polyurethane microcapsules, said microcapsules is made of polyurethane polyurethane latex particles, and the coated latex particles in the polyurethane constituting the pesticide;

[0009] Microcapsules were prepared finishing steps of: formulating the aqueous thickener DRA, polyurethane microcapsules and binder β - cyclodextrin, was added an aqueous solution of the DRA thickeners, stir to give a microcapsule liquid finishing ;

[0010] Coating Step: a base fabric on the rear upper surface of the microcapsules knife finishing liquor, dried at 85 ° C, and then baking at 110-120 ° C, and then at 80~90 ° C in washed with water, and finally dried again at 85 ° C, to give repellent fabric.

[0011] Further, the step of preparing polyurethane microcapsules, prepared OPlO first emulsifier concentration of 2g / L emulsion, adding polyethylene glycol 400 15g per 100ml of the emulsion, the diisocyanate 3g, 3g 15~25g dispersant and pesticides, the reaction temperature and stirring rate at 1000r / min and 70 ° C, and polycondensation of the emulsion was 1.5h, and finally natural cooling and natural cooling Wen Houjing opposite to the chamber 24h, the precipitate to obtain a polyurethane microcapsules.

[0012] Still further, said diisocyanate is hexamethylene diisocyanate, toluene diisocyanate or diphenylmethane diisocyanate.

[0013] Still further, the dispersing agent is a sodium alginate.

[0014] Still further, said pesticide is a pyrethroid insecticide.

[0015] Further, the step of preparing the microcapsules finishing liquor, first formulated at a concentration of 15g / L aqueous DRA thickeners, polyurethane microcapsules 30~40g added per 100ml of an aqueous solution of the thickening agent and DRA 20g binder β - cyclodextrin, stirring was continued for 5min, to give a microcapsule liquid finishing.

[0016] Further, in the coating step, the base fabric of the cloth feed rate 40_50m / min.

[0017] The repellent fabric A technical solution of the present invention, i.e., the upper surface of the base fabric is coated with a polyurethane layer of microcapsules, microcapsule coating consists of a polyurethane microcapsules a polyurethane, a polyurethane microcapsules polyurethane latex particles , and coated on latex particles in the polyurethane aspect insecticide configuration. Technical effect: a polyurethane latex particles due to the microcapsules having a polyurethane two-layer structure composed of a polyurethane housing, and housing of the polyurethane covering the outer housing emulsifier, this could make the polyurethane microcapsules insecticides slow release insect repellent active play good results; polyurethane adhesive properties while good, poor permeability, so the present invention is one kind repellent fabric is coated only on the surface of the polyurethane layer of microcapsules, so that the present invention is the use of a when repellent fabric, coated with a polyurethane layer of microcapsules on the surface not in contact with the human body, to ensure that the user's health. Combination of one repellent fabrics of the present invention is not decreased because of water repellent capacity occurs. Accordingly, the present invention also provides a method for preparing a repellent fabric, comprising the step of preparing polyurethane microcapsules; microcapsule preparation step and a coating step finishing liquid. Which can achieve the above technical effects.

BRIEF DESCRIPTION

[0018] FIG. 1 structure diagram of an insect repellent fabrics of the present invention.

[0019] The schematic structure of a polyurethane microcapsules repellent fabric 2 of the present invention FIG.

detailed description

[0020] Please refer to FIG. 1 and FIG. 2, the inventors of the present invention in order to better technical understanding of the invention, particularly by the following examples, in conjunction with the accompanying drawings and will be described in detail:

[0021] Example 1:

[0022] Polyurethane microcapsules prepared steps: first OPlO 2g emulsifier added 100ml of deionized water to prepare an emulsifier OPLO concentration of 2g / L emulsion 1000ml. Then 15g of polyethylene glycol 400,3g hexamethylene diisocyanate and 15g of insecticide added to the emulsion, and then adding 3g of sodium alginate in the emulsion as a homogeneous dispersion U. Then, the stirring rate of 1000r / min, under the reaction conditions of a reaction temperature of 70 ° C, the emulsion was carried out polycondensation reaction. After 1.5h, the emulsion the polycondensation reaction was terminated. Natural cooling to room Wen Houjing opposite 24h, microcapsules precipitated to form a polyurethane 21, polyurethane 21 particle size of the microcapsules is 5~15 micrometers. Polyurethane microcapsules 21 include polyurethanes Polyurethanes latex particles and latex particles 3 3 4 pesticide. Polyurethane latex particles 3 of a polyurethane housing 31, and a coating 31 constituting an outer casing of polyurethane emulsifier housing 32. The upper clear solution decanted, leaving a polyurethane microcapsules precipitated spare 21. Wherein the polyethylene glycol of molecular weight 400 400 polyethylene glycol. At room temperature is about 25 ° C.

[0023] Microcapsules were prepared finishing steps of: a polyurethane finishing liquid microcapsule 21 microcapsules, binder β - cyclodextrin, DRA thickener and deionized water were mixed preparation. First weighed thickener DRA15g, 100ml of deionized water was added, with stirring, until the thickening agent in deionized water DRA uniformly mixed to give a concentration of up to 15g / L aqueous thickener DRA. The thickening agent is then added to an aqueous solution of DRA polyurethane adhesive and microcapsules 30g β - cyclodextrin 20g, stirring was continued for 5min, the finally obtained transparent uniform microcapsule finishing solution.

[0024] Coating Step: The prepared microcapsules were finishing a scratch on the surface of the cotton fabric substrate I of fabric, this fabric is then dried for 3min to 85 ° C, and then at 110-120 ° C in baking 3min, followed by washing with water at 85~90 ° C Lmin, and finally dried at 85 ° C 3min, to obtain a repellent fabrics of the present invention, the cloth feed rate of the coating step, the fabric base 40 is I 50m / min.

[0025] An insect repellent fabric of the present invention, includes a base fabric and the base body I I polyurethane fabric surface 2 a layer of microcapsules, the microcapsules polyurethane microcapsule coating 2 is formed of polyurethane 21.

[0026] The above-described embodiments, the emulsifier OPlO nonylphenol polyoxyethylene ether, the thickener is polyacrylic acid thickening DRA homogeneous U, which is produced by the German company Clariant. Pesticides used in this embodiment is a pyrethroid insecticide.

[0027] Example 2:

[0028] Polyurethane microcapsules prepared steps: first OPlO 2g emulsifier added 100ml of deionized water to prepare an emulsifier OPLO concentration of 2g / L emulsion 1000ml. Then 15g of polyethylene glycol 400,3g diphenylmethane diisocyanate and 20g of insecticide added to the emulsion, then the emulsion was added 3g of the sodium alginate as a dispersing agent . Then, the stirring rate of 1000r / min, under the reaction conditions of a reaction temperature of 70 ° C, the emulsion was carried out polycondensation reaction.

After 1.5h, the emulsion the polycondensation reaction was terminated. Natural cooling to room Wen Houjing opposite 24h, microcapsules precipitated to form a polyurethane 21, polyurethane 21 particle size of the microcapsules is 5~15 micrometers. Polyurethane microcapsules 21 include polyurethanes Polyurethanes latex particles and latex particles 3 3 4 pesticide. Polyurethane latex particles 3 of a polyurethane housing 31, and a coating 31 constituting an outer casing of polyurethane emulsifier housing 32. The upper clear solution decanted, leaving a polyurethane microcapsules precipitated spare 21.

[0029] Microcapsules were prepared finishing steps of: a polyurethane finishing liquid microcapsule 21 microcapsules, binder β - cyclodextrin, DRA thickener and deionized water were mixed preparation. First weighed thickener DRA15g, 100ml of deionized water was added, with stirring, until the thickening agent in deionized water DRA uniformly mixed to give a concentration of up to 15g / L aqueous thickener DRA. The thickening agent is then added to an aqueous solution of DRA polyurethane adhesive and microcapsules 35g β - cyclodextrin 20g, stirring was continued for 5min, the finally obtained transparent uniform microcapsule finishing solution.

[0030] Coating Step: The prepared microcapsules were finishing a scratch on the surface of the cotton fabric substrate I of fabric, this fabric is then dried for 3min to 85 ° C, and then at 110-120 ° C in baking 3min, followed by washing with water at 85~90 ° C Lmin, and finally dried at 85 ° C 3min, to obtain a repellent fabrics of the present invention, the cloth feed rate of the coating step, the fabric base 40 is I 50m / min.

[0031] Examples of pesticides used in the present embodiment is a pyrethroid insecticide.

[0032] Example 3:

[0033] Polyurethane microcapsules prepared steps: first OPlO 2g emulsifier added 100ml of deionized water to prepare an emulsifier OPLO concentration of 2g / L emulsion 1000ml. Then 15g of polyethylene glycol 400,3g tolylene diisocyanate and 25g of insecticide added to the emulsion and then the emulsion was added 3g of sodium alginate as a dispersing agent. Then, the stirring rate lOOOr / min, under the reaction conditions of a reaction temperature of 70 ° C, the emulsion was carried out polycondensation reaction. After 1.5h, the emulsion the polycondensation reaction was terminated. Natural cooling to room Wen Houjing opposite 24h, microcapsules precipitated to form a polyurethane 21, polyurethane 21 particle size of the microcapsules is 5~15 micrometers. Polyurethane microcapsules 21 include polyurethanes Polyurethanes latex particles and latex particles 3 3 4 pesticide. Polyurethane latex particles 3 of a polyurethane housing 31, and a coating 31 constituting an outer casing of polyurethane emulsifier housing 32. The upper clear solution decanted, leaving a polyurethane microcapsules precipitated spare 21.

[0034] Microcapsules were prepared finishing steps of: a polyurethane finishing liquid microcapsule 21 microcapsules, binder β - cyclodextrin, DRA thickener and deionized water were mixed preparation. First weighed thickener DRA15g, 100ml of deionized water was added, with stirring, until the thickening agent in deionized water DRA uniformly mixed to give a concentration of up to 15g / L aqueous thickener DRA. Was then added to the aqueous polyurethane thickeners DRA 40g microcapsules and a binder β - cyclodextrin 20g, stirring was continued for 5min, the finally obtained transparent uniform microcapsule finishing solution.

[0035] Coating Step: The prepared microcapsules were finishing a scratch on the surface of the cotton fabric substrate I of fabric, this fabric is then dried for 3min to 85 ° C, and then at 110-120 ° C in baking 3min, then at 85 ~ 90 ° C Lmin washed, and finally dried at 85 ° C 3min, to obtain a repellent fabrics of the present invention, the cloth feed rate of the coating step, the fabric base 40 is I 50m / min.

[0036] Examples of pesticides used in the present embodiment is a pyrethroid insecticide.

[0037] It must be noted that the fabric base I may be not only cotton fabrics, may also be a hemp fabric, polyester fabric, nylon fabric or acrylic fabrics and other fabrics.

[0038] Next, the effect of one kind of mosquito repellent fabrics of the present invention were evaluated: Evaluation criteria referred AATCC135-2004 standard.

[0039] Select qualifying test insects attack charged mosquito cage, i.e., 3-5 days old yet sucking female mosquito Aedes albopictus 300 / cage, and 4 subjects, according to Examples 1 to Example 1 a repellent fabrics of the present invention, and the cotton fabric production method of preparation 3 to obtain the method of preparation 3 a repellent fabric obtained according to the present invention, as well as after washing 20 times respectively set according to the embodiment It is the subject of two arms, the hand wearing plastic gloves, mosquito cage stay in 2min, each test cotton fabrics do first the control is performed, a test of the present invention do repellent fabric. Count the insects on the subject within 2min arm perch times, as shown in Table 1.

List repellent fabric using one kind of effect [0040] Table 1 Invention

[0041]

Cotton fabric 106 ΤΪ3

[0042] As can be seen from Table 1 An insect repellent fabric of the present invention have good repellent effect, and still has a good repellent effect after washing 20 times.

Claims (4)

1. 1. A method for preparing repellent fabric, comprising the steps of: preparing polyurethane microcapsules steps: first formulated OP1 emulsifier concentration of 2g / L emulsion, then add 15g per 100ml of the liquid milk tank 400,3g of polyethylene glycol diisocyanate, 3g dispersant and 15~25g insecticidal homogeneous U, and then stirred at the reaction temperature rate of 1000r / min and 70 ° C, and polycondensation for 1.5h emulsion, and finally natural cooling and natural cooling to room Wen Houjing opposite 24h, the precipitate to give the polyurethane microcapsules, the microcapsules are polyurethane latex particles of polyurethane, and coated on latex particles in the polyurethane constituting the pesticide; micro capsules were prepared finishing steps: first prepared at a concentration of 15g / L aqueous thickener DRA, then add 20g 30~40g polyurethane microcapsules and binder β per 100ml of aqueous thickener DRA - cyclodextrin, continued stirred for 5min, to give a microcapsule liquid finishing; coating step: a base fabric on the rear upper surface of the microcapsules knife finishing liquor, dried at 85 ° C, and then baking at 110-120 ° C, and then washed with water at 80~90 ° C, and finally at 85 ° C again Drying to give a mosquito repellent fabric.
2. 2. A method for preparing a repellent fabric according to claim 1, wherein: the dispersing agent is sodium alginate.
3. 3. Preparation method of claim 1. A repellent fabric as claimed in claim, wherein: said pesticide is a pyrethroid insecticide.
4. The production method of any one of 1 to 3, said one repellent fabric as claimed in claim, wherein: said coating step, the base fabric of the cloth feed rate of 40-50m / min.