Antibacterial deodorizing hot melt adhesive, its preparation method and application

Abstract

The application discloses an antibacterial and deodorizing hot melt adhesive as well as a preparation method and application thereof. The antibacterial and deodorizing hot melt adhesive comprises the following components in percentage by mass: a polymer matrix: 10-25%; a tackifying resin: 40-60%; a naphthenic oil: 10-35%; a supported silver inorganic antibacterial agent: 0.2-5%; an antioxidant: 0.1-1%; a particle stabilizer: 0.1-1%; and a dispersant: 0.1-1.5%. The preparation method of the antibacterial and deodorizing hot melt adhesive is very simple, and the components are mixed in batches and uniformly. The hot melt adhesive has the advantages of good bonding performance, excellent antibacterial performance, good deodorizing effect and the like, and the preparation method is simple, the production cost is low, and the hot melt adhesive is suitable for large-scale industrial application.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot melt adhesive, in particular to an antibacterial and deodorizing hot melt adhesive as well as a preparation method and application thereof. BACKGROUND

[0002] A paper diaper is a common disposable sanitary product, and its use has been increasing in recent years. The paper diaper is not only used for infants and young children, but also used in the medical and health industry and some special industries. In order to meet the needs of different consumers, researchers have developed various functional paper diapers, such as antibacterial paper diapers and deodorizing paper diapers. The existing antibacterial paper diapers generally impart antibacterial effect to the paper diaper by modifying the surface layer with antibacterial agents, but this may cause direct contact between the human skin and the antibacterial agents, which may adversely affect human health and pose a safety hazard.

[0003] A paper diaper is composed of a non-woven fabric surface layer, a flow guide layer, an absorbent layer, a bottom film and other components, and the components are bonded together by hot melt adhesive. If the adhesive has antibacterial and deodorizing properties, it can effectively prevent bacteria and odors, and avoid direct contact between the antibacterial and deodorizing components and the human skin. At present, most of the hot melt adhesives used in disposable sanitary products do not have antibacterial and deodorizing properties. Although a few hot melt adhesives obtained by directly adding antibacterial agents or / and deodorizing agents have certain antibacterial and / or deodorizing effects, they generally have poor bonding properties, poor thermal stability and dispersibility of the antibacterial agents or / and deodorizing agents, and other problems, which are difficult to fully meet the actual application requirements.

[0004] Therefore, it is of great significance to develop a hot melt adhesive with good bonding properties, excellent antibacterial properties and good deodorizing effect. SUMMARY

[0005] The present application aims to provide an antibacterial and deodorizing hot melt adhesive as well as a preparation method and application thereof.

[0006] The technical solution adopted by the present application is as follows:

[0007] An antibacterial and deodorizing hot melt adhesive comprises the following components in mass percentage:

[0008] Polymer matrix: 10-25%;

[0009] Tackifying resin: 40-60%;

[0010] Naphthenic oil: 10-35%;

[0011] Silver-based inorganic antibacterial agent: 0.2-5%;

[0012] Antioxidant: 0.1-1%;

[0013] Particle stabilizer: 0.1% to 1%;

[0014] Dispersant: 0.1% to 1.5%.

[0015] Preferably, an antibacterial deodorizing hot melt adhesive comprises the following components by mass percentage:

[0016] Polymer matrix: 18% to 21%;

[0017] Tackifying resin: 46% to 52%;

[0018] Naphthenic oil: 24% to 32%;

[0019] Silver-based inorganic antibacterial agent: 2% to 3%;

[0020] Antioxidant: 0.4% to 0.8%;

[0021] Particle stabilizer: 0.4% to 0.6%;

[0022] Dispersant: 0.3% to 0.5%.

[0023] Preferably, the polymer matrix is at least one of styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS), and ethylene-vinyl acetate copolymer (EVA).

[0024] Preferably, the tackifying resin is at least one of petroleum resin, hydrogenated petroleum resin, terpene resin, rosin resin, and hydrogenated aromatic modified aliphatic hydrocarbon resin.

[0025] Preferably, the carrier in the silver-based inorganic antibacterial agent is at least one of phosphate, zeolite, montmorillonite, and bentonite, and the active component loaded is inorganic silver salt.

[0026] Preferably, the antioxidant is at least one of hindered phenol antioxidant, phosphite antioxidant, and thioester antioxidant.

[0027] Preferably, the particle stabilizer is at least one of potassium methylene benzotriazole, thymol, basic zinc carbonate, benzotriazole, and aluminum magnesium hydroxy carbonate (Almagate).

[0028] Preferably, the dispersant is polyester-based hyperdispersant.

[0029] Preferably, the polyester-based hyperdispersant is made by a preparation method comprising the following steps:

[0030] 1) mixing 6-caprolactone, propionic acid and titanate catalyst, and then heating to carry out reflux reaction in a protective atmosphere to obtain carboxyl-terminated poly-caprolactone;

[0031] 2) dispersing the carboxyl-terminated poly-caprolactone and tetraethylene pentamine in an organic solvent, and then heating to 140-160℃ in a protective atmosphere

[0032] reacting for 8-12 hours to obtain the polyester type hyperdispersant.

[0033] Preferably, the molar ratio of 6-caprolactone to propionic acid in step 1) is 4-12:1.

[0034] Preferably, the amount of the titanate catalyst added in step 1) is 0.1-0.4% of the total mass of 6-caprolactone and propionic acid.

[0035] Preferably, the titanate catalyst in step 1) is tetrabutyl titanate.

[0036] Preferably, the protective atmosphere in step 1) is nitrogen atmosphere.

[0037] Preferably, the reflux reaction in step 1) is carried out at 170-190℃, and the reaction time is 10-15 hours.

[0038] Preferably, the mass ratio of the carboxyl-terminated poly-caprolactone to tetraethylene pentamine in step 2) is 1:2-5.

[0039] Preferably, the organic solvent in step 2) is at least one of toluene, dichloromethane and N,N-dimethylformamide.

[0040] Preferably, the protective atmosphere in step 2) is nitrogen atmosphere.

[0041] A preparation method of the antibacterial and deodorizing hot melt adhesive as described above comprises the following steps:

[0042] 1) blending and melting a polymer matrix, a tackifying resin, a part of naphthenic oil and an antioxidant to prepare mixture I, and mixing the remaining naphthenic oil, a supported silver type inorganic antibacterial agent, a particle stabilizer and a dispersant to prepare mixture II;

[0043] 2) mixing mixture I and mixture II to obtain the antibacterial and deodorizing hot melt adhesive.

[0044] Preferably, the mixing in step 1) is carried out at 50-80℃.

[0045] A paper diaper comprising the antibacterial and deodorizing hot melt adhesive.

[0046] The hot melt adhesive has the advantages of good bonding performance, excellent antibacterial performance, good deodorization effect, and the like, and the preparation method is simple, the production cost is low, and the hot melt adhesive is suitable for large-scale industrial application.

[0047] Specifically,

[0048] 1) The hot melt adhesive of the present application adds a supported silver-based inorganic antibacterial agent, an antioxidant, a particle stabilizer, and a dispersant, the particle stabilizer and the dispersant can be closely adsorbed on the surface of the supported silver-based inorganic antibacterial agent particles, so as to form steric hindrance between the particles, greatly reducing the particle agglomeration and flocculation of the antibacterial particles caused by Brownian motion during the high-temperature processing and high-temperature application coating process of the hot melt adhesive, improving the dispersibility of the antibacterial particles in the hot melt adhesive matrix, and the antioxidant, the particle stabilizer, and the dispersant can form a protective layer on the surface of the antibacterial particles, which can significantly improve the oxidation discoloration problem of the supported silver-based inorganic antibacterial agent particles, and the combined action of the above components and the improvement of the preparation process can finally make the hot melt adhesive have excellent antibacterial and deodorization effects and excellent bonding performance.

[0049] 2) The hot melt adhesive of the present application can be used in disposable sanitary products such as paper diapers and sanitary napkins, which can not only effectively kill bacteria and reduce bacterial growth, but also effectively absorb the odor generated by urine, blood, and the like, significantly improving the dryness and freshness of the product during use. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 Figure for the action mechanism of the particle stabilizer and the dispersant on the supported silver-based inorganic antibacterial agent. DETAILED DESCRIPTION

[0051] The present application will be further explained and described below in conjunction with specific examples.

[0052] Example 1:

[0053] An antibacterial and deodorizing hot melt adhesive, the composition of which is shown in the following table:

[0054] Table 1 Composition of an antibacterial and deodorizing hot melt adhesive

[0055]

[0056]

[0057] Note:

[0058] The polyester type hyperdispersant is prepared by the following method: 1) mixing 304 g of 6-caprolactone, 24.6 g of propionic acid and 0.6 g of tetrabutyl titanate, and then heating to 180℃ under nitrogen atmosphere to reflux for 12 h to obtain carboxyl-terminated poly-caprolactone; 2) dispersing 20 g of the carboxyl-terminated poly-caprolactone and 60 g of tetraethylenepentamine in 10 mL of toluene, and then reacting under nitrogen atmosphere at 150℃ for 10 h to obtain the polyester type hyperdispersant.

[0059] The preparation method of the antibacterial and deodorizing hot melt adhesive comprises the following steps:

[0060] 1) blending a polymer matrix, an adhesion resin, 3 / 4 of a naphthenic oil and an antioxidant at 160℃ to melt and stir until a mixture I is obtained, and mixing the remaining naphthenic oil, a supported silver type inorganic antibacterial agent, a particle stabilizer and a dispersant (the mechanism of the particle stabilizer and the dispersant on the supported silver type inorganic antibacterial agent is shown in Figure 1 ) at 70℃ to obtain a mixture II;

[0061] 2) mixing the mixture I and the mixture II uniformly, continuously stirring and vacuumizing to above -0.88 MPa until no bubbles are generated, to obtain the antibacterial and deodorizing hot melt adhesive.

[0062] Performance test:

[0063] The antibacterial and deodorizing hot melt adhesive of the embodiment is coated on a selected sanitary product substrate by a hot melt adhesive machine for bonding and compounding, and bonding strength, deodorizing performance, antibacterial activity and thermal stability tests are carried out, and the test results are shown in the following table:

[0064] Table 2: Test results of bonding strength, deodorizing performance, antibacterial activity and thermal stability

[0065]

[0066] Note:

[0067] Bonding strength: the coated sample is cut into a small strip with a width of 25 mm, and the length can be cut according to actual needs, and then T-type peeling force is tested on a tensile testing machine, wherein the peeling speed of the tensile testing machine is set to 300 mm / min;

[0068] Deodorizing performance: tested according to "GB / T 33610.2-2017 Determination of odor reduction of textiles Part 2: detection tube method";

[0069] Antibacterial activity: tested according to "JIS L 1902 2002 Textiles-Test methods and evaluation of antibacterial action";

[0070] Thermal stability: the hot melt adhesive sample was placed in a high temperature environment of 160°C for 24 hours, and the appearance change was observed (the initial color of the antibacterial and deodorizing hot melt adhesive of the present embodiment was light yellow).

[0071] As shown in Table 2, the antibacterial and deodorizing hot melt adhesive of the present embodiment has high bonding strength (comparable to the hot melt adhesive of Comparative Example 1 without adding antibacterial components), excellent deodorizing performance and thermal stability (both scores are A), and certain antibacterial performance (score B, the loading amount of silver-based inorganic antibacterial agent is relatively small).

[0072] Example 2:

[0073] An antibacterial and deodorizing hot melt adhesive, the composition of which is shown in the following table:

[0074] Table 3 Composition table of an antibacterial and deodorizing hot melt adhesive

[0075]

[0076] The preparation method of the antibacterial and deodorizing hot melt adhesive includes the following steps:

[0077] 1) Blend the polymer matrix, tackifying resin, 3 / 4 of the naphthenic oil, and antioxidant at 160°C to prepare mixture I, and mix the remaining naphthenic oil, silver-based inorganic antibacterial agent, particle stabilizer, and dispersant at 70°C to prepare mixture II;

[0078] 2) Mix mixture I and mixture II uniformly, continuously stir and vacuum to above -0.88 MPa until there are no bubbles, and the antibacterial and deodorizing hot melt adhesive is obtained.

[0079] Performance test:

[0080] The bonding strength, deodorizing performance, antibacterial activity, and thermal stability test results of the antibacterial and deodorizing hot melt adhesive of the present embodiment are shown in the following table:

[0081] Table 4 Bonding strength, deodorizing performance, antibacterial activity, and thermal stability test results

[0082]

[0083] As shown in Table 4, the antibacterial and deodorizing hot melt adhesive of the present embodiment has high bonding strength, excellent deodorizing performance and thermal stability (both scores are A), and excellent antibacterial performance (score A).

[0084] Example 3:

[0085] An antibacterial and deodorizing hot melt adhesive, the composition of which is shown in the following table:

[0086] Table 5 Composition table of an antibacterial and deodorizing hot melt adhesive

[0087]

[0088]

[0089] The preparation method of the antibacterial and deodorizing hot melt adhesive comprises the following steps:

[0090] 1) blend the polymer matrix, tackifying resin, 3 / 4 of the naphthenic oil and antioxidant at 160°C under heating and stirring until completely melted to prepare mixture I, and mix the remaining naphthenic oil, supported silver-based inorganic antibacterial agent, particle stabilizer and dispersant uniformly at 70°C to prepare mixture II;

[0091] 2) mix mixture I and mixture II uniformly, continuously stir and vacuum to above -0.88 MPa until no bubbles, to obtain the antibacterial and deodorizing hot melt adhesive.

[0092] Performance test:

[0093] The bonding strength, deodorizing performance, antibacterial activity and thermal stability test results of the antibacterial and deodorizing hot melt adhesive of the embodiment are shown in the following table:

[0094] Table 6 Bonding strength, deodorizing performance, antibacterial activity and thermal stability test results

[0095]

[0096]

[0097] As can be seen from Table 6, the antibacterial and deodorizing hot melt adhesive of the embodiment has greater bonding strength (the addition amount of plasticizer naphthenic oil is slightly more, the addition amount of polymer matrix is slightly less, the cohesive strength of the hot melt adhesive is reduced, and the bonding strength is slightly lower than that of Example 1 and Example 2), excellent deodorizing performance and thermal stability (both scores are A), and excellent antibacterial performance (score A).

[0098] Example 4:

[0099] An antibacterial and deodorizing hot melt adhesive, the composition of which is shown in the following table:

[0100] Table 7 Composition table of an antibacterial and deodorizing hot melt adhesive

[0101]

[0102]

[0103] The preparation method of the antibacterial and deodorizing hot melt adhesive comprises the following steps:

[0104] 1) blend the polymer base, tackifying resin, 3 / 4 of the naphthenic oil and antioxidant at 160°C under heating and stirring until completely melted to make mixture I, and mix the remaining naphthenic oil, supported silver inorganic antibacterial agent, particle stabilizer and dispersant uniformly at 70°C to make mixture II;

[0105] 2) mix mixture I and mixture II uniformly, continuously stir and vacuum to above -0.88 MPa until no bubbles, to obtain the antibacterial and deodorizing hot melt adhesive.

[0106] Performance test:

[0107] The test results of the bonding strength, deodorizing performance, antibacterial activity and thermal stability of the antibacterial and deodorizing hot melt adhesive of the present example are shown in the following table:

[0108] Table 8 Test results of bonding strength, deodorizing performance, antibacterial activity and thermal stability

[0109]

[0110] From Table 8, it can be seen that the antibacterial and deodorizing hot melt adhesive of the present example has greater bonding strength (the addition amount of plasticizer naphthenic oil is less, the addition amount of polymer base is more, the viscosity of hot melt adhesive is larger, the open time of hot melt adhesive in the coating process is reduced, the wetting performance on the substrate is decreased, and the bonding strength is slightly lower than that of Example 1 and Example 2), excellent deodorizing performance (scored A), excellent antibacterial performance (scored A), and good thermal stability (scored between B and C, the viscosity of hot melt adhesive is higher, the diffusion of supported silver inorganic antibacterial agent in the glue is affected, the dispersibility is lower, and the thermal stability is slightly lower than that of Example 1 and Example 2).

[0111] Comparative Example 1:

[0112] A hot melt adhesive, the composition of which is shown in the following table:

[0113] Table 9 Composition table of a hot melt adhesive

[0114]

[0115] The preparation method of the hot melt adhesive includes the following steps:

[0116] Blend the polymer base, tackifying resin, naphthenic oil and antioxidant at 160°C under heating and stirring until completely melted, and then continuously stir and vacuum to above -0.88 MPa until no bubbles, to obtain the hot melt adhesive.

[0117] Performance test:

[0118] The test results of the bonding strength, deodorizing performance, antibacterial activity and thermal stability of the hot melt adhesive of the present comparative example are shown in the following table:

[0119] Table 10 Adhesion strength, deodorizing performance, antibacterial activity and thermal stability test results

[0120]

[0121] From Table 10, it can be seen that the hot melt adhesive of the present comparative example has high adhesion strength, but poor deodorizing performance (score C) and no antibacterial effect (score C).

[0122] Comparative Example 2

[0123] A hot melt adhesive, the composition of which is shown in the following table:

[0124] Table 11 Composition table of a hot melt adhesive

[0125]

[0126]

[0127] The preparation method of the above hot melt adhesive comprises the following steps:

[0128] 1) Blend the polymer matrix, tackifying resin, 3 / 4 of the naphthenic oil and antioxidant at 160°C under heating and stirring until completely melted to form mixture I, and mix the remaining naphthenic oil and supported silver-based inorganic antibacterial agent uniformly at 70°C to form mixture II;

[0129] 2) Mix mixture I and mixture II uniformly, continuously stir and vacuum to above -0.88 MPa until no bubbles, i.e. the hot melt adhesive is obtained.

[0130] Performance test:

[0131] The adhesion strength, deodorizing performance, antibacterial activity and thermal stability test results of the hot melt adhesive of the present comparative example are shown in the following table:

[0132] Table 12 Adhesion strength, deodorizing performance, antibacterial activity and thermal stability test results

[0133]

[0134]

[0135] From Table 12, it can be seen that the hot melt adhesive of the present comparative example has a relatively large bonding strength (no particle stabilizer and dispersant is added, the supported silver-based inorganic antibacterial agent cannot be uniformly dispersed in the hot melt adhesive, a large amount of particle agglomerates is generated, nozzle clogging and uneven coating are prone to occur during coating application, the bonding strength is lower than that of Example 2), excellent deodorizing performance (scored A), certain antibacterial performance (scored B), but poor thermal stability (scored C, no particle stabilizer and dispersant is added, the hot melt adhesive is prone to discoloration and partial deterioration during high-temperature preparation and coating application, the antibacterial performance is reduced, and the thermal stability is significantly deteriorated).

[0136] Comparative Example 3

[0137] A hot melt adhesive, the composition of which is shown in the following table:

[0138] Table 13 Composition of a hot melt adhesive

[0139]

[0140]

[0141] The preparation method of the hot melt adhesive comprises the following steps:

[0142] 1) The polymer matrix, tackifying resin, 3 / 4 of the naphthenic oil, and antioxidant are blended and heated and stirred at 160°C until completely melted to prepare mixture I, and the remaining naphthenic oil, supported silver-based inorganic antibacterial agent, and particle stabilizer are mixed uniformly at 70°C to prepare mixture II;

[0143] 2) The mixture I and the mixture II are mixed uniformly, continuously stirred, and vacuumed to above -0.88 MPa until no bubbles are generated, and the hot melt adhesive is obtained.

[0144] Performance test:

[0145] The bonding strength, deodorizing performance, antibacterial activity, and thermal stability test results of the hot melt adhesive of the present comparative example are shown in the following table:

[0146] Table 14 Bonding strength, deodorizing performance, antibacterial activity, and thermal stability test results

[0147]

[0148] From Table 14, it can be seen that the hot melt adhesive of the present comparative example has a relatively large bonding strength (no dispersant is added, the bonding strength is lower than that of Example 2), excellent deodorizing performance (scored A), excellent antibacterial performance (scored A), but general thermal stability (scored B, no dispersant is added).

[0149] Comparative Example 4

[0150] A hot melt adhesive, except that mixture II was prepared at room temperature, was prepared in the same manner as in Example 2.

[0151] Performance test:

[0152] The results of the bonding strength, deodorizing performance, antibacterial activity, and thermal stability tests of the hot melt adhesive of the present comparative example are shown in the following table.

[0153] Table 15 Results of bonding strength, deodorizing performance, antibacterial activity, and thermal stability tests

[0154]

[0155] As can be seen from Table 15, the hot melt adhesive of the present comparative example had a high bonding strength, excellent deodorizing performance (rated A), and excellent antibacterial performance (rated A), but poor thermal stability (rated C, mixture II was prepared by pre-dispersion at room temperature, and compared to Example 2, the thermal stability of the hot melt adhesive decreased because as the pre-dispersion preparation of mixture II was performed within a certain temperature range, the dispersibility of the silver-based inorganic antibacterial agent increased as the temperature increased, and when the pre-dispersion temperature was low, the dispersibility of the supported silver-based inorganic antibacterial agent was poor).

[0156] Comparative Example 5:

[0157] A hot melt adhesive, except that mixture II was prepared at 120°C, was prepared in the same manner as in Example 2.

[0158] Performance test:

[0159] The results of the bonding strength, deodorizing performance, antibacterial activity, and thermal stability tests of the hot melt adhesive of the present comparative example are shown in the following table.

[0160] Table 16 Results of bonding strength, deodorizing performance, antibacterial activity, and thermal stability tests

[0161]

[0162]

[0163] As can be seen from Table 16, the hot melt adhesive of the present comparative example had a high bonding strength, excellent deodorizing performance (rated A), and excellent antibacterial performance (rated A), but general thermal stability (between B and C, mixture II was prepared by pre-dispersion at 120°C, and compared to Example 2, the thermal stability of the hot melt adhesive decreased because when the pre-dispersion temperature of mixture II was high, the particle stabilizer and dispersant had not yet fully adsorbed on the surface of the supported silver-based inorganic antibacterial agent, and as a result of the increased degree of collision due to Brownian motion, agglomeration occurred, resulting in poor pre-dispersion of mixture II, and ultimately the thermal stability of the hot melt adhesive was reduced compared to Example 2, and the dispersibility of the supported silver-based inorganic antibacterial agent was poor).

[0164] The above embodiments are the preferred embodiments of the present application, but the embodiments of the present application are not limited to the above embodiments, and any changes, modifications, substitutions, combinations, simplifications, etc. made without departing from the spirit and principles of the present application should be equivalent replacement manners and should be included in the protection scope of the present application.

Claims

1. An antimicrobial deodorizing hot melt adhesive characterized by, consists of the following components in percentage by mass: polymer base: 10% to 25%; tackifying resin: 40% to 60%; naphthenic oil: 10% to 35%; supported silver-based inorganic antibacterial agent: 0.2% to 5%; antioxidant: 0.1% to 1%; particle stabilizer: 0.1% to 1%; dispersant: 0.1% to 1.5%; the particle stabilizer is benzotriazole; the dispersant is a polyester type hyperdispersant; the polyester type hyperdispersant is made by a preparation method comprising the following steps: 1) mixing 6-hexalactone, propionic acid and titanate catalyst, and then placing in a protective atmosphere to heat and carry out reflux reaction to obtain carboxyl-terminated polyhexalactone; 2) dispersing the carboxyl-terminated polyhexalactone and tetraethylenepentamine in an organic solvent, and then placing in a protective atmosphere to react at 140°C to 160°C for 8h to 12h to obtain the polyester type hyperdispersant; the antibacterial and deodorizing hot melt adhesive is made by a preparation method comprising the following steps: 1) blending and melting the polymer base, tackifying resin, part of the naphthenic oil and antioxidant to make mixture I, and uniformly mixing the remaining naphthenic oil, supported silver-based inorganic antibacterial agent, particle stabilizer and dispersant to make mixture II; 2) uniformly mixing mixture I and mixture II to obtain the antibacterial and deodorizing hot melt adhesive; the mixing in step 1) is carried out at 50°C to 80°C.

2. The antimicrobial deodorant hot melt adhesive according to claim 1, wherein: the polymer base is at least one of styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer and ethylene-vinyl acetate copolymer.

3. The antimicrobial deodorant hot melt adhesive of claim 1, wherein: the tackifying resin is at least one of petroleum resin, hydrogenated petroleum resin, terpene resin, rosin resin and hydrogenated aromatic modified aliphatic hydrocarbon resin.

4. The antimicrobial deodorant hot melt adhesive of claim 1, wherein: the carrier in the supported silver-based inorganic antibacterial agent is at least one of phosphate, zeolite, montmorillonite and bentonite, and the active component loaded is inorganic silver salt.

5. The antimicrobial deodorant hot melt adhesive according to any one of claims 1 to 4, characterized in that: the antioxidant is at least one of hindered phenol antioxidant, phosphite antioxidant and thioester antioxidant.

6. A paper diaper characterized by comprising: the antibacterial and deodorizing hot melt adhesive as claimed in any one of claims 1 to 5.

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