Preparation process of waterproof antibacterial nylon material

Abstract

The invention discloses a preparation process of a waterproof antibacterial nylon material, which comprises the following steps: providing zirconium phosphate and silver salt, respectively dissolving the zirconium phosphate and the silver salt in water, and forming gel through hydrolysis and condensation polymerization; putting the gel into polytetrafluoroethylene powder, blending, drying and calcining to obtain a silver-loaded zirconium phosphate PTFE material; weighing the silver-loaded zirconium phosphate PTFE material, PA resin, glass fiber, silicon dioxide powder, an antioxidant and a lubricant, putting the materials into a reaction kettle for blending, and heating to complete a polymerization reaction; discharging the material after the polymerization is completed, cooling and pelletizing to obtain a water-resistant antibacterial nylon wet slice; and putting the wet slices into an extraction drying device to obtain the waterproof antibacterial nylon material. The zirconium phosphate, the silver salt and the polytetrafluoroethylene powder are mixed and reacted to prepare a water-resistant antibacterial material, then the water-resistant antibacterial material is added into the PA resin for polymerization reaction, and the nylon material is extruded, so that the nylon has water-resistant antibacterial characteristics and good formability.

Description

Technical Field

[0001] The invention belongs to the technical field of reinforced nylon, and in particular relates to a preparation process of a water-resistant and antibacterial nylon material. Background Art

[0002] In recent years, with the improvement of people's living standards and the enhancement of health awareness, the demand for various antibacterial material products has continued to increase, among which antibacterial plastic products account for a large proportion, including various daily products, such as refrigerators, air conditioners, various food containers, packaging bags, washing machines, toy products, vacuum cleaners, etc., all of which use various different thermoplastic antibacterial plastics. These thermoplastic antibacterial plastics include antibacterial polypropylene (PP), antibacterial polyethylene (PE), antibacterial polystyrene (PS), antibacterial polyvinyl chloride (PVC), antibacterial polyacrylonitrile-butadiene-styrene (ABS), antibacterial nylon (PA), antibacterial polyethylene terephthalate (PET), antibacterial polyoxymethylene (POM), antibacterial polymethyl methacrylate (PMMA), antibacterial polycarbonate (PC) / ABS alloy, antibacterial PP / ABS alloy, antibacterial PA / ABS alloy, etc.

[0003] At present, there are many literatures and related patents on antibacterial plastic processing. The preparation of antibacterial plastics is mainly achieved by adding a certain amount of antibacterial agent during the plastic granulation process. There are many types of antibacterial agents, including inorganic antibacterial agents and organic antibacterial agents. Inorganic antibacterial agents include Ag, Zn-zeolite, Ag, Zn-zirconium phosphate, Ag, Zn-water-soluble glass, etc., and organic antibacterial agents include quaternary ammonium salts, quaternary phosphonium salts, imidazoles, pyridines, organic metals, etc. Inorganic antibacterial agents and organic antibacterial agents each have their own advantages and disadvantages. Inorganic antibacterial agents have higher heat resistance, but there is a disadvantage that Ag-based antibacterial agents are easy to change color, and the dosage is relatively large, and the cost is high; organic antibacterial agents have higher bactericidal efficiency and less addition, but there are disadvantages such as poor heat resistance, poor water resistance, and easy precipitation.

[0004] Therefore, a new type of water-resistant and antibacterial nylon material needs to be studied urgently. Summary of the invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide a preparation process of a water-resistant and antibacterial nylon material, so as to avoid the problem that the previous nylon material is weak in water resistance and antibacterial properties.

[0006] In order to solve the above technical problems, the present invention discloses a process for preparing a water-resistant and antibacterial nylon material, which comprises: Step a. providing zirconium phosphate and silver salt, dissolving them in water respectively, and forming a gel by hydrolysis and polycondensation reaction; Step b. placing the gel in polytetrafluoroethylene powder, blending, drying, and calcining to obtain a silver-loaded zirconium phosphate PTFE material; Step c. Weigh 40-80 parts of silver-loaded zirconium phosphate PTFE material, 80-120 parts of PA resin, 12-26 parts of glass fiber, 3-6 parts of silica powder, 0.2-1.2 parts of antioxidant, 0.1-1.5 parts of lubricant, put them into a reactor for blending, and heat to complete the polymerization reaction; Step d. After the polymerization is completed, the material is discharged, cooled and pelletized to obtain water-resistant and antibacterial nylon wet slices; Step e. Place the wet slices into an extraction and drying device, extract with boiling water at 100°C for 36 hours, and dry with high-purity nitrogen at 135°C for 36 hours to obtain a water-resistant and antibacterial nylon material.

[0007] According to one embodiment of the present invention, in step c, the polymerization reaction is first heated to 110-130 degrees, and the water is distilled to 5-10% to complete the primary polymerization; then the temperature is continued to rise to 220 degrees, the pressure is 0.2-1.8MPa, and maintained for 2.5 hours to complete the secondary polymerization; finally, the air is slowly released to a pressure of 0.1MPa, and the temperature is raised to 270 degrees, and the vacuum is drawn to -0.05MPa, and maintained for half an hour to complete the tertiary polymerization. According to one embodiment of the present invention, the mass ratio of gel to polytetrafluoroethylene powder is 1:1.5, and the silver ion content in the silver-loaded zirconium phosphate PTFE material is 3.6wt%.

[0008] According to one embodiment of the present invention, the silver-loaded zirconium phosphate PTFE material comprises 60 parts, PA resin comprises 100 parts, glass fiber comprises 19 parts, silicon dioxide powder comprises 4.5 parts, antioxidant comprises 0.5 parts, and lubricant comprises 0.8 parts.

[0009] According to one embodiment of the present invention, there are 40 parts of silver-loaded zirconium phosphate PTFE material, 80 parts of PA resin, 12 parts of glass fiber, 3 parts of silica powder, 0.2 parts of antioxidant, and 0.1 parts of lubricant.

[0010] According to one embodiment of the present invention, the silver-loaded zirconium phosphate PTFE material is 80 parts, the PA resin is 120 parts, the glass fiber is 26 parts, the silicon dioxide powder is 6 parts, the antioxidant is 1.2 parts, and the lubricant is 1.5 parts.

[0011] Compared with the prior art, the present invention can achieve the following technical effects: A water-resistant and antibacterial material is prepared by mixing zirconium phosphate, silver salt, and polytetrafluoroethylene powder, which is then added to PA resin for polymerization reaction and extruded into nylon material, so that the nylon itself has water-resistant and antibacterial properties and good formability.

[0012] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time. DETAILED DESCRIPTION

[0013] The following will describe the implementation methods of the present invention in detail with reference to examples, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0014] The invention discloses a preparation process of a water-resistant and antibacterial nylon material, which comprises: Step a. providing zirconium phosphate and silver salt, dissolving them in water respectively, and forming a gel by hydrolysis and polycondensation reaction; Step b. placing the gel in polytetrafluoroethylene powder, blending, drying, and calcining to obtain a silver-loaded zirconium phosphate PTFE material; Step c. Weigh 40-80 parts of silver-loaded zirconium phosphate PTFE material, 80-120 parts of PA resin, 12-26 parts of glass fiber, 3-6 parts of silica powder, 0.2-1.2 parts of antioxidant, 0.1-1.5 parts of lubricant, put them into a reactor for blending, and heat to complete the polymerization reaction; Step d. After the polymerization is completed, the material is discharged, cooled and pelletized to obtain water-resistant and antibacterial nylon wet slices; Step e. Place the wet slices into an extraction and drying device, extract with boiling water at 100°C for 36 hours, and dry with high-purity nitrogen at 135°C for 36 hours to obtain a water-resistant and antibacterial nylon material.

[0015] In step c, the polymerization reaction is first heated to 110-130 degrees, and the water is distilled to 5-10% to complete the primary polymerization; then the temperature is continued to rise to 220 degrees, the pressure is 0.2-1.8MPa, and maintained for 2.5 hours to complete the secondary polymerization; finally, the air is slowly released to the pressure of 0.1MPa, and the temperature is raised to 270 degrees at the same time, and the vacuum is drawn to -0.05MPa, and maintained for half an hour to complete the tertiary polymerization. Example 1

[0016] Step a. providing zirconium phosphate and silver salt, dissolving them in water respectively, and forming a gel by hydrolysis and polycondensation reaction; Step b. placing the gel in polytetrafluoroethylene powder, blending, drying, and calcining to obtain a silver-loaded zirconium phosphate PTFE material; the mass ratio of the gel to the polytetrafluoroethylene powder is 1:1.5, and the silver ion content in the silver-loaded zirconium phosphate PTFE material is 3.6wt%; Step c weighed 60 parts of silver-loaded zirconium phosphate PTFE material, 100 parts of PA resin, 19 parts of glass fiber, 4.5 parts of silica powder, 0.5 parts of antioxidant, 0.8 parts of lubricant, put them into a reactor for blending, and heated to complete the polymerization reaction; Step d. After the polymerization is completed, the material is discharged, cooled and pelletized to obtain water-resistant and antibacterial nylon wet slices; Step e. Place the wet slices into an extraction and drying device, extract with boiling water at 100°C for 36 hours, and dry with high-purity nitrogen at 135°C for 36 hours to obtain a water-resistant and antibacterial nylon material.

[0017] In step c, the polymerization reaction is first heated to 110-130 degrees, and the water is distilled to 5-10% to complete the primary polymerization; then the temperature is continued to rise to 220 degrees, the pressure is 0.2-1.8MPa, and maintained for 2.5 hours to complete the secondary polymerization; finally, the air is slowly released to the pressure of 0.1MPa, and the temperature is raised to 270 degrees at the same time, and the vacuum is drawn to -0.05MPa, and maintained for half an hour to complete the tertiary polymerization. Example 2

[0018] Step a. providing zirconium phosphate and silver salt, dissolving them in water respectively, and forming a gel by hydrolysis and polycondensation reaction; Step b. placing the gel in polytetrafluoroethylene powder, blending, drying, and calcining to obtain a silver-loaded zirconium phosphate PTFE material; the mass ratio of the gel to the polytetrafluoroethylene powder is 1:1.5, and the silver ion content in the silver-loaded zirconium phosphate PTFE material is 3.6wt%; Step c weighed 40 parts of silver-loaded zirconium phosphate PTFE material, 80 parts of PA resin, 12 parts of glass fiber, 3 parts of silica powder, 0.2 parts of antioxidant, 0.1 parts of lubricant, put them into a reactor for blending, and heated to complete the polymerization reaction; Step d. After the polymerization is completed, the material is discharged, cooled and pelletized to obtain water-resistant and antibacterial nylon wet slices; Step e. Place the wet slices into an extraction and drying device, extract with boiling water at 100°C for 36 hours, and dry with high-purity nitrogen at 135°C for 36 hours to obtain a water-resistant and antibacterial nylon material.

[0019] In step c, the polymerization reaction is first heated to 110-130 degrees, and the water is distilled to 5-10% to complete the first polymerization; then the temperature is continued to rise to 220 degrees, the pressure is 0.2-1.8MPa, and maintained for 2.5 hours to complete the second polymerization; finally, the air is slowly released to the pressure of 0.1MPa, and the temperature is raised to 270 degrees, and the vacuum is -0.05MPa, and maintained for half an hour to complete the third polymerization. Example 3

[0020] Step a. providing zirconium phosphate and silver salt, dissolving them in water respectively, and forming a gel by hydrolysis and polycondensation reaction; Step b. placing the gel in polytetrafluoroethylene powder, blending, drying, and calcining to obtain a silver-loaded zirconium phosphate PTFE material; the mass ratio of the gel to the polytetrafluoroethylene powder is 1:1.5, and the silver ion content in the silver-loaded zirconium phosphate PTFE material is 3.6wt%; Step c weighed 80 parts of silver-loaded zirconium phosphate PTFE material, 120 parts of PA resin, 26 parts of glass fiber, 6 parts of silica powder, 1.2 parts of antioxidant, 1.5 parts of lubricant, put them into a reactor for blending, and heated to complete the polymerization reaction; Step d. After the polymerization is completed, the material is discharged, cooled and pelletized to obtain water-resistant and antibacterial nylon wet slices; Step e. Place the wet slices into an extraction and drying device, extract with boiling water at 100°C for 36 hours, and dry with high-purity nitrogen at 135°C for 36 hours to obtain a water-resistant and antibacterial nylon material.

[0021] In step c, the polymerization reaction is first heated to 110-130 degrees, and the water is distilled to 5-10% to complete the primary polymerization; then the temperature is continued to rise to 220 degrees, the pressure is 0.2-1.8MPa, and maintained for 2.5 hours to complete the secondary polymerization; finally, the air is slowly released to the pressure of 0.1MPa, and the temperature is raised to 270 degrees at the same time, and the vacuum is drawn to -0.05MPa, and maintained for half an hour to complete the tertiary polymerization.

[0022] Equal amounts of nylon particles of implementation cases 1-3 and conventional zirconium phosphate PTFE material without silver were weighed as implementation case 4, and then a nylon membrane was prepared, washed and immersed in a Staphylococcus aureus suspension, and cultured in a 37°C incubator for 18 hours for a control test, and the number of colonies was observed.

[0023] In summary, the nylon membrane prepared in Examples 1-3 has good waterproofness, and the PTFE material loaded with silver zirconium phosphate can release metal Ag+, which can quickly "kill" microorganisms attached to the surface of the nylon cloth, has a very high sterilization rate, and has good waterproofness, maintains a low water flux, and has good durability.

[0024] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A process for preparing a water-resistant and antibacterial nylon material, characterized in that: include: Step a. providing zirconium phosphate and silver salt, dissolving them in water respectively, and forming a gel by hydrolysis and polycondensation reaction; Step b. placing the gel in polytetrafluoroethylene powder, blending, drying, and calcining to obtain a silver-loaded zirconium phosphate PTFE material; Step c. Weigh 40-80 parts of silver-loaded zirconium phosphate PTFE material, 80-120 parts of PA resin, 12-26 parts of glass fiber, 3-6 parts of silica powder, 0.2-1.2 parts of antioxidant, 0.1-1.5 parts of lubricant, put them into a reactor for blending, and heat to complete the polymerization reaction; Step d. After the polymerization is completed, the material is discharged, cooled and pelletized to obtain water-resistant and antibacterial nylon wet slices; Step e. Place the wet slices into an extraction and drying device, extract with boiling water at 100°C for 36 hours, and dry with high-purity nitrogen at 135°C for 36 hours to obtain a water-resistant and antibacterial nylon material.

2. The process for preparing water-resistant and antibacterial nylon material according to claim 1, characterized in that: In the step c, the polymerization reaction is first heated to 110-130 degrees, and the water is distilled to 5-10% to complete the primary polymerization; then the temperature is continued to rise to 220 degrees, the pressure is 0.2-1.8MPa, and maintained for 2.5 hours to complete the secondary polymerization; finally, the air is slowly released to the pressure of 0.1MPa, and the temperature is raised to 270 degrees, and the vacuum is drawn to -0.05MPa, and maintained for half an hour to complete the tertiary polymerization.

3. The process for preparing water-resistant and antibacterial nylon material according to claim 1, characterized in that: The mass ratio of the gel to the polytetrafluoroethylene powder is 1:1.5, and the silver ion content in the silver-loaded zirconium phosphate PTFE material is 3.6wt%.

4. The process for preparing water-resistant and antibacterial nylon material according to claim 1, characterized in that: The silver-loaded zirconium phosphate PTFE material comprises 60 parts, PA resin 100 parts, glass fiber 19 parts, silicon dioxide powder 4.5 parts, antioxidant 0.5 parts, and lubricant 0.8 parts.

5. The process for preparing water-resistant and antibacterial nylon material according to claim 1, characterized in that: The silver-loaded zirconium phosphate PTFE material comprises 40 parts, PA resin comprises 80 parts, glass fiber comprises 12 parts, silicon dioxide powder comprises 3 parts, antioxidant comprises 0.2 parts, and lubricant comprises 0.1 parts.

6. The process for preparing water-resistant and antibacterial nylon material according to claim 1, characterized in that: The silver-loaded zirconium phosphate PTFE material comprises 80 parts, PA resin comprises 120 parts, glass fiber comprises 26 parts, silicon dioxide powder comprises 6 parts, antioxidant comprises 1.2 parts, and lubricant comprises 1.5 parts.