阅读说明：本技术 一种除臭针织布及其制造方法 (Deodorizing knitted fabric and manufacturing method thereof ) 是由 林海波 龙秀舞 周明权 于 2021-08-12 设计创作，主要内容包括：本发明公开了一种除臭针织布及其制造方法。除臭针织布由涤纶针织布经抗菌整理剂整理得到,所述抗菌整理剂由包括如下质量份的组分制得:水性聚氨酯：3～7份；聚六亚甲基胍：1～3份；分散剂：1～2份；中药抗菌提取液：15～25份；水：50～70份；所述中药抗菌提取液采用桂枝提取液、黄连提取液、艾叶提取液与野菊花提取液中的一种或几种。本申请制得的除臭针织布具有较好的抗菌性能与除臭性能,从而改善针织布因细菌滋生出现异味的问题。(The invention discloses a deodorizing knitted fabric and a manufacturing method thereof. The deodorizing knitted fabric is obtained by finishing polyester knitted fabric with an antibacterial finishing agent, wherein the antibacterial finishing agent is prepared from the following components in parts by mass: 3-7 parts; polyhexamethylene guanidine: 1-3 parts; dispersing agent: 1-2 parts; traditional Chinese medicine antibacterial extracting solution: 15-25 parts; water: 50-70 parts of a solvent; the traditional Chinese medicine antibacterial extracting solution is one or more of cassia twig extracting solution, coptis extracting solution, folium artemisiae argyi extracting solution and wild chrysanthemum extracting solution. The deodorization looped fabric that this application was made has better antibacterial property and deodorization performance to improve the looped fabric and breed the problem that the peculiar smell appears because of the bacterium.)

1. The deodorizing knitted fabric is characterized by being obtained by finishing polyester knitted fabric with an antibacterial finishing agent, wherein the antibacterial finishing agent is prepared from the following components in parts by mass:

aqueous polyurethane: 3-7 parts;

polyhexamethylene guanidine: 1-3 parts;

dispersing agent: 1-2 parts;

traditional Chinese medicine antibacterial extracting solution: 15-25 parts;

water: 50-70 parts of a solvent;

the traditional Chinese medicine antibacterial extracting solution is one or more of cassia twig extracting solution, coptis extracting solution, folium artemisiae argyi extracting solution and wild chrysanthemum extracting solution.

2. The deodorizing knitted fabric according to claim 1, wherein the antibacterial finishing agent further comprises 2 to 3 parts of polyvinyl alcohol.

3. The deodorizing knitted fabric according to claim 1, wherein the antibacterial finishing agent further comprises 1-2 parts of a silane coupling agent.

4. The deodorizing knitted fabric according to claim 3, wherein the silane coupling agent is an aminosilane coupling agent and a long-chain alkyl silane coupling agent in a mass ratio of 1 (1-2).

5. The deodorizing knitted fabric according to claim 1, wherein the knitted polyester fabric is obtained by interweaving polyester filaments, the polyester filaments are obtained by melt-extruding modified PET, and the modified PET is obtained by performing esterification reaction and polycondensation reaction on the following raw materials in parts by mass:

terephthalic acid: 50 to 65 portions of

Ethylene glycol: 15-23 parts;

deodorizing particles: 0.1-0.6 part;

catalyst: 0.01-0.03 part;

a stabilizer: 0.01-0.03 part;

the deodorization particles are nano-carriers with transition metal cations adsorbed on the surfaces, and are added before the esterification reaction.

6. The deodorizing knitted fabric according to claim 5, wherein the raw material of the modified PET further comprises 0.1-0.3 parts of nano titanium dioxide, and the nano titanium dioxide is added before the esterification reaction.

7. Deodorizing knitted fabric according to claim 5, characterized in that said transition metal cation is Cu²⁺、Ag⁺、Fe²⁺、Fe³⁺One or more of them.

8. The deodorizing knitted fabric according to claim 5, wherein the nano-carrier is nano-silica or nano-copper oxide.

9. Deodorizing knitted fabric according to claim 5, characterized in that said modified PET is obtained by the following process:

uniformly mixing ethylene glycol, deodorizing particles and terephthalic acid to prepare slurry, and then putting the slurry in a nitrogen atmosphere and under a pressurizing condition for an esterification reaction to obtain an esterification product;

and (3) under the action of a catalyst and a stabilizer, carrying out polycondensation reaction on the esterification product under a vacuum condition, and granulating after the reaction is finished to obtain the modified PET.

10. A method for producing a deodorizing knitted fabric according to any one of claims 1 to 9, characterized by comprising the steps of:

s1: adding waterborne polyurethane, polyhexamethylene guanidine, a dispersing agent and a traditional Chinese medicine antibacterial extracting solution into water, and uniformly mixing to obtain an antibacterial finishing agent;

s2: and (3) soaking the knitted fabric in the antibacterial finishing agent for 3-5 hours at a bath ratio of 1 (20-30), and rolling and drying after soaking to obtain the deodorizing knitted fabric.

Technical Field

The invention relates to the field of cloth, in particular to a deodorizing knitted fabric and a manufacturing method thereof.

Background

The knitted fabric is formed by bending yarns into a set and stringing the yarns, and has the advantages of soft texture, moisture absorption and air permeability. Accordingly, knit fabrics are widely used in the manufacture of undergarments, such as underwear and socks. It can significantly improve the wearing comfort compared to woven fabrics. However, in high temperature weather, the underwear easily absorbs sweat on the surface of the human body, so that bacteria are bred and peculiar smell is emitted, which is not beneficial to ensuring human health and improving wearing experience.

Disclosure of Invention

The application provides a deodorizing knitted fabric and a manufacturing method thereof, and the antibacterial deodorizing fabric can effectively inhibit breeding of bacteria and reduce generation or emission of peculiar smell.

In a first aspect, the present application provides a deodorizing knitted fabric, the deodorizing knitted fabric is obtained by finishing a polyester knitted fabric with an antibacterial finishing agent, wherein the antibacterial finishing agent is prepared from the following components in parts by mass:

aqueous polyurethane: 3-7 parts;

polyhexamethylene guanidine: 1-3 parts;

dispersing agent: 1-2 parts;

traditional Chinese medicine antibacterial extracting solution: 15-25 parts;

water: 50-70 parts of a solvent;

the traditional Chinese medicine antibacterial extracting solution is one or more of cassia twig extracting solution, coptis extracting solution, folium artemisiae argyi extracting solution and wild chrysanthemum extracting solution.

By adopting the technical scheme, the cassia twig extract, the coptis chinensis extract, the folium artemisiae argyi extract and the wild chrysanthemum extract all contain more antibacterial components, and the antibacterial components are arranged on the surface of a fabric or in fibers of the fabric, so that the breeding of bacteria can be effectively inhibited, and peculiar smell substances generated by the growth and reproduction of the bacteria are reduced. The cassia twig, wild chrysanthemum and folium artemisiae argyi extract also contains a certain amount of aromatic substances, and the aroma smell of the extract can cover the peculiar smell emitted by the bacterial products to a certain extent, so that the aims of antibiosis and deodorization are fulfilled.

Preferably, the antibacterial finishing agent further comprises 2-3 parts of polyvinyl alcohol.

By adopting the technical scheme, the waterborne polyurethane resin is mainly cured by the cohesion and adhesion generated by polar groups in molecules, the adhesion and water resistance are poor, the adhesion of the traditional Chinese medicine antibacterial extracting solution and the polyhexamethylene guanidine on the fabric is not favorably improved, and the polyhexamethylene guanidine is very easy to fall off after being washed by water, so that the long-acting property of the antibacterial and deodorant effects of the knitted fabric is not favorably maintained. The polyvinyl alcohol has thickening and tackifying effects on the aqueous polyurethane resin, and can effectively improve the adhesive property of the antibacterial finishing agent; meanwhile, the polyvinyl alcohol and the waterborne polyurethane can form a certain cross-linked network structure, so that the compactness and the water resistance of the antibacterial finishing agent after film forming are improved.

Preferably, the antibacterial finishing agent further comprises 1-2 parts of a silane coupling agent.

By adopting the technical scheme, the silane coupling agent can improve the compatibility of inorganic antibacterial components in the traditional Chinese medicine antibacterial extracting solution and polyurethane resin, and improve the bonding strength of the antibacterial components, so that the long-acting property of the antibacterial and deodorizing capability of the knitted fabric is improved.

Preferably, the silane coupling agent adopts an aminosilane coupling agent and a long-chain alkyl silane coupling agent in a mass ratio of 1 (1-2).

By adopting the technical scheme, the amino silane coupling agent and the long-chain alkyl silane coupling agent are matched together, so that the adhesive force and the water resistance of the antibacterial finishing agent after film forming can be obviously improved. The reason may be that one end of the aminosilane coupling agent is provided with siloxane groups which can be hydrolyzed to generate silicon hydroxyl groups and are crosslinked with hydroxyl groups of the waterborne polyurethane or polyvinyl alcohol to form interpenetrating network structures; the other end of the polyester fiber has an amino group which can react and bond with an active group on the surface of the polyester fiber; thereby playing the role of improving the compactness and the adhesion of the film layer. One end of the long-chain alkyl silane contains siloxane groups, and the other end of the long-chain alkyl silane is a long-chain alkyl with hydrophobicity, which plays a role in improving the water resistance of the antibacterial and deodorant film layer.

Preferably, the polyester knitted fabric is obtained by interweaving polyester yarns, the polyester yarns are obtained by melt extrusion of modified PET, and the modified PET is obtained by performing esterification reaction and polycondensation reaction on the following raw materials in parts by mass:

terephthalic acid: 50 to 65 portions of

Ethylene glycol: 15-23 parts;

deodorizing particles: 0.1-0.6 part;

catalyst: 0.01-0.03 part;

a stabilizer: 0.01-0.03 part;

the deodorization particles are nano-carriers with transition metal cations adsorbed on the surfaces, and are added before the esterification reaction.

By adopting the technical scheme, the deodorizing ions are prepared into raw materials for esterification reaction, and after esterification reaction and polycondensation reaction, the polyethylene terephthalate Polymer (PET) is obtained, and the deodorizing particles are fully dispersed and coated in the polymer, so that the excellent and long-acting deodorizing effect is achieved.

The deodorant particles can remove peculiar smell generated by bacteria on one hand, and can reduce peculiar smell emitted by raw materials such as coptis chinensis and the like in the traditional Chinese medicine antibacterial extracting solution on the other hand. The action mechanism of the deodorant probably lies in that transition metal ions are adsorbed on the nano-carrier by mixing the nano-carrier with a transition metal ion solution, and the characteristic that the transition metal ions can be combined with peculiar smell substances to form peculiar smell-free substances is utilized, so that the long-term effective deodorization effect is achieved.

Preferably, the raw material of the modified PET also comprises 0.1-0.3 part of nano titanium dioxide, and the nano titanium dioxide is added before the esterification reaction.

By adopting the technical scheme, the nano titanium dioxide can be uniformly coated in the PET polymer, so that on one hand, the long-acting sterilization and deodorization effects are achieved through the catalytic oxidation effect; on the other hand, the generation of a by-product diethylene glycol in the PET polymerization process can be reduced, the crystallinity of polyester is improved, and finally, the mechanical strength of the knitted fabric is improved.

Preferably, the transition metal cation adopts Cu²⁺、Ag⁺、Fe²⁺、Fe³⁺One or more of them.

By adopting the technical scheme, the transition metal ions can react with peculiar smell substances, particularly main peculiar smell substances in life such as ammonia, mercaptan and the like, and the peculiar smell substances are converted into the peculiar smell-free substances, so that an effective deodorization effect is achieved.

Preferably, the nano-carrier adopts nano-silica or nano-copper oxide.

By adopting the technical scheme, the nano silicon dioxide has a porous structure, has high adsorbability on transition metal ions and large loading capacity, and is favorable for improving the deodorization effect. The nano copper oxide has the carrier effect and a good antibacterial effect, is dispersed in the polyester fiber and is beneficial to improving the antibacterial and deodorizing performance.

Preferably, the modified PET is prepared according to the following method:

uniformly mixing ethylene glycol, deodorizing particles and terephthalic acid to prepare slurry, and then putting the slurry in a nitrogen atmosphere and under a pressurizing condition for an esterification reaction to obtain an esterification product;

and (3) under the action of a catalyst and a stabilizer, carrying out polycondensation reaction on the esterification product under a vacuum condition, and granulating after the reaction is finished to obtain the modified PET.

By adopting the technical scheme, the deodorization particles and the PET raw material are mixed to prepare slurry, and the in-situ polymerization can be carried out on the surfaces of the deodorization particles along with the esterification and polycondensation reaction, so that the deodorization particles are wrapped in the PET polymer. Effectively solves the problem of uneven dispersion of the nano-carrier due to compatibility and promotes the full play of the function of the deodorization particles.

In a second aspect, the present application provides a method for manufacturing a deodorizing knitted fabric, comprising the steps of:

s1: adding waterborne polyurethane, polyhexamethylene guanidine, a dispersing agent and a traditional Chinese medicine antibacterial extracting solution into water, and uniformly mixing to obtain an antibacterial finishing agent;

s2: soaking the knitted fabric in the antibacterial finishing agent for 3-5 hours, wherein the mass ratio of the knitted fabric to the antibacterial finishing agent is 1 (20-30), and rolling and drying after soaking to obtain the deodorizing knitted fabric.

Through adopting above-mentioned technical scheme, through soaking the roll-in, arrange effective antibiotic composition in the antibiotic finishing agent to the looped fabric on for the looped fabric has antibiotic deodorization effect.

In summary, the present application has the following beneficial effects:

1. according to the application, the traditional Chinese medicine antibacterial extracting solution prepared from the cassia twig extracting solution, the coptis extracting solution, the folium artemisiae argyi extracting solution and the wild chrysanthemum extracting solution is adopted, so that the knitted fabric is endowed with antibacterial performance to inhibit the generation of peculiar smell substances, and meanwhile, the peculiar smell is covered by utilizing aromatic substances in the traditional Chinese medicine antibacterial extracting solution.

2. According to the application, the polyvinyl alcohol and the silane coupling agent are matched together, and the aminosilane coupling agent and the long-chain alkyl silane coupling agent are preferably compounded, so that the long-acting property of the antibacterial and deodorant performance of the knitted fabric is effectively improved.

3. Through adding deodorant granule and nanometer titanium dioxide in PET's polymerization process in this application for partial PET takes place the normal position polymerization on deodorant granule and nanometer titanium dioxide surface, improves the compatibility of deodorant granule and nanometer titanium dioxide in the PET polymer, simultaneously, has better durability, can give play to antibiotic deodorization effect for a long time.

Detailed Description

Preparation example of modified PET

Preparation example 1, a modified PET, the selection of the raw material components and their respective amounts are shown in table 1 and was prepared as follows:

step 1: uniformly stirring and mixing ethylene glycol, deodorizing particles, nano titanium dioxide and terephthalic acid to prepare slurry, then placing the slurry under the protection of nitrogen, pressurizing to 0.3 +/-0.05 MPa, simultaneously heating to 240 +/-5 ℃ to perform esterification reaction on the ethylene glycol and the terephthalic acid, and after 3 hours, when the esterification rate is about 92%, finishing the reaction to obtain an esterification product;

step 2: adding ethylene glycol antimony (catalyst) and trimethyl phosphate (stabilizer) into the esterification product, vacuumizing until the absolute pressure is 600 +/-50 Pa, controlling the temperature to be 270 +/-5 ℃, carrying out polycondensation reaction on the esterification product, discharging and cooling after 50min of reaction, and granulating by using a granulator to obtain the modified PET.

Preparation examples 2 to 6, a modified PET, were different from preparation example 1 in that the selection of each raw material component and the corresponding amount thereof were as shown in Table 1.

TABLE 1 selection of starting components and their respective amounts (kg) of modified PET in preparation examples 1 to 6

Wherein, the deodorizing particles in preparation example 1 are prepared by mixing and stirring nano silicon dioxide and 5 wt% silver chloride aqueous solution for 2h, wherein the nano silicon dioxide is obtained from Hengge of Hangzhou, and the CAS number is 14808-60-7; the deodorizing particles in preparation example 2 were prepared by mixing and stirring nano copper oxide obtained from Hengge in Hangzhou with CAS number 1317-38-0 in a mass ratio of 1:8 with 10 wt% aqueous solution of ferric chloride for 1 h; the nanometer titanium dioxide is obtained from Hangzhou Hengge rutile type titanium dioxide, the average particle size is 30nm, and the CAS number is 13463-67-7.

Preparation example 7, a modified PET, was different from preparation example 1 in that deodorizing particles were added together with a catalyst in step 2.

Preparation example 8, a modified PET, was different from preparation example 1 in that nano titanium dioxide was added together with a catalyst in step 2.

Examples

Example 1, a deodorizing knitted fabric, prepared according to the following steps:

(1) preparing polyester yarns: the modified PET prepared in the preparation example 1 is metered, extruded, cooled, oiled, stretched, heat-set and wound to prepare the polyester yarn.

Wherein the extrusion temperature is 280 plus or minus 5 ℃; cooling by air cooling, wherein the air temperature is 20 +/-1 ℃; the winding speed is 5 ㎞/min; the filament number is 0.3 dtex; the oil content of the obtained polyester yarn is 0.6%.

(2) Manufacturing a polyester knitted fabric: and (3) interweaving the polyester yarns prepared by the method by using a circular weft knitting machine to form the polyester knitted fabric with the weight of 220 g/square meter.

(3) The selection of the raw material components and the corresponding dosage are shown in table 2, and the preparation method comprises the following steps:

s1: adding waterborne polyurethane, polyhexamethylene guanidine, a dispersing agent, a traditional Chinese medicine antibacterial extracting solution, polyvinyl alcohol and a silane coupling agent into water, heating to 80 ℃, and uniformly stirring and dispersing to obtain an antibacterial finishing agent;

s2: soaking the knitted fabric in the antibacterial finishing agent for 4 hours at a bath ratio of 1:20, rolling under the pressure of 0.2MPa after soaking is finished, wherein the rolling residual rate is 90%, and then drying at 70 ℃ to constant weight to obtain the deodorizing knitted fabric.

Examples 2 to 8, a deodorizing knitted fabric, different from example 1 in that the selection of each raw material component and the corresponding amount thereof are shown in table 2.

Table 2 raw material ratio (kg) of the deodorizing knitted fabrics in examples 1 to 8

In Table 2, the aqueous polyurethane is PU-403 from En chemical, Anhui; polyhexamethylene guanidine is obtained from Hangzhou Luochuan organism, and the content of effective substances is 25%; the dispersant is peregal O-30; the polyvinyl alcohol is 1788; the amino silane coupling agent is gamma-aminopropyl triethoxysilane; the long-chain alkyl silane coupling agent is hexadecyl trimethoxy silane.

The preparation process of the wild chrysanthemum extracting solution comprises the following steps: crushing cleaned wild chrysanthemum raw materials into raw material particles with the size of 40-60 meshes, mixing 1 kg of the raw material particles with 10 kg of 30 wt% ethanol, performing reflux extraction for 2 hours for 3 times, and filtering after reflux is finished to obtain an extracting solution; then evaporating and concentrating the ethanol to obtain 1L of wild chrysanthemum extract.

The preparation processes of the cassia twig extract, the coptis chinensis extract, the folium artemisiae argyi extract and the wild chrysanthemum flower extract are different only in raw materials.

Examples 9 to 15, a deodorizing knitted fabric, different from example 1 in that the modified PET prepared in preparation examples 2 to 8 was used, respectively.

Comparative example

Comparative example 1, a deodorizing knitted fabric, the difference with example 1, is that the same amount of coptis extract is used to replace wild chrysanthemum extract in the antibacterial traditional Chinese medicine extract.

Comparative example 2, a deodorizing knitted fabric, which is different from example 1 in that an equal amount of wild chrysanthemum flower extract was used instead of the coptis chinensis extract.

Comparative example 3, a deodorizing knitted fabric, which is different from example 1 in that an equivalent amount of the extract of coptis chinensis is used instead of the extract of artemisia argyi and the extract of cinnamomum cassia twig.

Comparative example 4, a deodorizing knitted fabric, which is different from example 1 in that a Chinese medicinal antibiotic extract solution is not added.

Comparative example 5, a commercially available silver ion antibacterial deodorizing fabric.

Performance test

Test 1: preparing a knitted fabric antibacterial performance test sample: the fabrics prepared in examples 1-15 and comparative examples 1-4 were cut into samples with a size of 45mm by 60 mm.

The test method comprises the following steps: the test was carried out according to the standard of appendix D8 test method for antibacterial textiles: oscillatory method in FZ/T73023 and 2006 antibacterial knitwear. In the test process, the vibration frequency is 300rpm, the vibration time is 30min, a 100W fluorescent lamp is adopted to irradiate the sample while oscillating, and the distance between the fluorescent lamp and the sample is 3 m. The bacteriostasis rate of the fabric sample to staphylococcus aureus (which is easy to generate odor substances) is obtained through testing, and the test result is shown in table 3.

Test 2: preparing a knitted fabric deodorization performance test sample: a piece of 30 x 30cm cloth was cut out from the deodorizing knitted fabrics obtained in examples 1 to 15 and comparative examples 1 to 5 to serve as a sample.

The test method comprises the following steps: the concentration of the mixture is respectively prepared in 5.5L glass bottles to be 500 +/-50 mg/m³NH of (2)₃And 21 groups of methyl mercaptan, wherein 20 groups were placed in one of the above samples, and the remaining group of vials were left empty as a blank. The concentration of the gas after 30min of exposure was measured, and the elimination rate was calculated, and the test results are shown in Table 3.

Test equipment: an ammonia gas detection tube, an HP5840A gas chromatograph, a 5.5L glass bottle and a syringe.

Test 3: the test method for testing the long-acting antibacterial and deodorizing performance of the knitted fabric comprises the following steps: and (3) performing standard washing on the deodorizing knitted fabric by referring to the Jianhua washing condition and procedure in appendix C in FZ/T73023-plus 2006 antibacterial knitwear. A2 g/L solution of AATCC 1993 standard detergent specified by the standard is used as a washing solution, a beaker is enlarged by the bath ratio of the sample to the washing solution of 1:30, the beaker is placed in a water bath constant temperature oscillator, and the beaker is oscillated and washed for 5min at the oscillation frequency of 50 times/min and the water temperature of 40 ℃. After washing, the sample was taken out and washed with deionized water 2 times as 1 washing process. The washing time is set to be 50min according to the washing program, after washing for 100 times, the bacteriostasis rate and the odor elimination rate are measured according to the methods in the test 1 and the test 2 again, the difference value before and after washing is calculated, and the test result is shown in the table 3.

Test 4: evaluation test method of knitted fabric odor: placing the deodorizing knitted fabric in an indoor environment with the temperature of 25 ℃ and the humidity of 50% RH for standing for 24h, and then randomly selecting 20 appraisers to perform sensory evaluation on the smell of the deodorizing knitted fabric by a smell identification method, wherein the smell identification time is 20 s; after the smelling identification is finished, the evaluator scores the odor of the knitted fabric, the score range is 1-10 points, the higher the score is, the higher the odor acceptance of the knitted fabric is, and the test result is shown in table 3.

TABLE 3 test 1-4 test results

And (3) analyzing test results:

(1) by combining the examples 1-15 and the comparative examples 1-5 and combining the table 3, the antibacterial and deodorizing performance of the knitted fabric can be remarkably improved by adopting the traditional Chinese medicine antibacterial extracting solution; and the traditional Chinese medicine antibacterial extracting solution obtained by compounding the four extracting solutions of the cassia twig, the coptis chinensis, the wild chrysanthemum and the folium artemisiae argyi can effectively reduce pungent smell in the traditional Chinese medicine and improve customer experience. The reason for this is probably that the cassia twig extract, the coptis chinensis extract, the folium artemisiae argyi extract and the wild chrysanthemum extract all contain more antibacterial components, and when the cassia twig extract, the coptis chinensis extract, the folium artemisiae argyi extract and the wild chrysanthemum extract are arranged on the surface of a fabric or in fibers of the fabric, the growth of bacteria can be effectively inhibited, and odor substances generated due to the growth and reproduction of the bacteria are further reduced. The cassia twig, wild chrysanthemum and folium artemisiae argyi extract also contains a certain amount of aromatic substances, and the aroma smell of the extract can cover the peculiar smell emitted by the bacterial products to a certain extent, so that the aims of antibiosis and deodorization are fulfilled. The aromatic substances of the cassia twig extract, the wild chrysanthemum extract and the folium artemisiae argyi extract, especially the faint scent of the wild chrysanthemum can neutralize the irritant traditional Chinese medicine smell in the coptis chinensis, and the smell evaluation of customers on knitted fabric products is improved.

(2) By combining the example 1 and the comparative examples 4-8 and combining the table 3, the polyvinyl alcohol and the silane coupling agent can effectively improve the water washing resistance of the deodorizing knitted fabric and prolong the long-acting property of the antibacterial and deodorizing performance of the deodorizing knitted fabric; and the silane coupling agent is preferably a compound of an aminosilane coupling agent and a long-chain alkyl silane coupling agent. The reason for this is probably that polyvinyl alcohol can form a certain network cross-linking structure with waterborne polyurethane, while aminosilane coupling agent can enhance the bonding strength between the antibacterial and deodorant coating film and the fiber, and long-chain silane coupling agent can improve the hydrophobicity of the antibacterial and deodorant coating film, so that the knitted fabric can still maintain good antibacterial and deodorant performance after being washed with water for many times.

(3) By combining the example 1 and the comparative examples 9-15 and combining the table 3, it can be seen that the antibacterial and deodorant performances, especially the long-acting performance, of the knitted fabric can be remarkably improved by adding the deodorant particles and the nano titanium dioxide before the esterification of the PET. The reason may be that the addition of the catalyst before esterification enables in-situ polymerization of terephthalic acid and ethylene glycol on the surfaces of the deodorizing particles and the nano titanium dioxide, so as to form nano particles coated with polyethylene terephthalate, improve the compatibility and the dispersibility of the nano particles, reduce the falling off of the deodorizing particles and the nano titanium dioxide in water washing or use, and further improve the long-lasting property of the antibacterial and deodorizing performance of the knitted fabric.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.