CN113308039A - Antibacterial plastic for toy and preparation method thereof - Google Patents
Antibacterial plastic for toy and preparation method thereof Download PDFInfo
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- CN113308039A CN113308039A CN202110596901.1A CN202110596901A CN113308039A CN 113308039 A CN113308039 A CN 113308039A CN 202110596901 A CN202110596901 A CN 202110596901A CN 113308039 A CN113308039 A CN 113308039A
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- 229920003023 plastic Polymers 0.000 title claims abstract description 91
- 239000004033 plastic Substances 0.000 title claims abstract description 91
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000011941 photocatalyst Substances 0.000 claims abstract description 87
- 239000000843 powder Substances 0.000 claims abstract description 78
- 239000010455 vermiculite Substances 0.000 claims abstract description 51
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 51
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 51
- -1 polyethylene Polymers 0.000 claims abstract description 24
- 239000004698 Polyethylene Substances 0.000 claims abstract description 23
- 229920000573 polyethylene Polymers 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 238000001746 injection moulding Methods 0.000 claims abstract description 14
- 239000011148 porous material Substances 0.000 claims abstract description 8
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 6
- 239000003365 glass fiber Substances 0.000 claims abstract description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052681 coesite Inorganic materials 0.000 claims description 9
- 229910052906 cristobalite Inorganic materials 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 229910052682 stishovite Inorganic materials 0.000 claims description 9
- 229910052905 tridymite Inorganic materials 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000000454 talc Substances 0.000 claims 1
- 229910052623 talc Inorganic materials 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 7
- 230000003115 biocidal effect Effects 0.000 description 4
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 238000005286 illumination Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 2
- 239000002216 antistatic agent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- 230000000249 desinfective effect Effects 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000012745 toughening agent Substances 0.000 description 2
- NKJOXAZJBOMXID-UHFFFAOYSA-N 1,1'-Oxybisoctane Chemical group CCCCCCCCOCCCCCCCC NKJOXAZJBOMXID-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical compound [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- LYOGXSMIQDIQOW-UHFFFAOYSA-N ethene titanium Chemical compound [Ti].C=C LYOGXSMIQDIQOW-UHFFFAOYSA-N 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- GNOIPBMMFNIUFM-UHFFFAOYSA-N hexamethylphosphoric triamide Chemical group CN(C)P(=O)(N(C)C)N(C)C GNOIPBMMFNIUFM-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Toys (AREA)
Abstract
The application relates to the field of plastic products, and particularly discloses an antibacterial plastic for a toy and a preparation method thereof. The raw materials of the antibacterial plastic comprise the following components in parts by weight: 100-120 parts of polyethylene; 30-40 parts of polyvinyl alcohol; 10-15 parts of glass fiber; 1-3 parts of a silane coupling agent; 3-7 parts of modified vermiculite powder with the density less than that of polyethylene; 3-5 parts of a first photocatalyst with the density higher than that of polyethylene; the modified vermiculite powder comprises vermiculite powder and a second photocatalyst positioned in pore passages of the vermiculite powder. The preparation method comprises the following steps: step one, preparing modified vermiculite powder; and step two, uniformly mixing polyethylene, polyvinyl alcohol, glass fiber, a silane coupling agent, modified vermiculite powder and a first photocatalyst in parts by weight, and then putting the mixture into an injection molding machine for injection molding to obtain the antibacterial plastic. The antibacterial plastic has the advantages of exponentially improving the antibacterial effect of the plastic product and avoiding a large amount of waste of the photocatalyst.
Description
Technical Field
The application relates to the field of plastic products, in particular to antibacterial plastic for toys and a preparation method thereof.
Background
Plastics are high molecular compounds obtained by polymerization of monomers by addition polymerization or polycondensation, which have a moderate deformation resistance between fibers and rubber, and are composed of synthetic resin, fillers, plasticizers, stabilizers, lubricants, colorants, and other additives.
The invention discloses a multifunctional polyethylene plastic which is composed of polyethylene, a filling agent, an antistatic agent, an anti-aging agent, a toughening agent, a lubricant, a dispersing agent and a coupling agent, wherein the filling agent is glass powder, the antistatic agent is polyoxyethylene fatty alcohol ether, the anti-aging agent is hexamethyl phosphoric triamide, the toughening agent is polyvinyl butyral, the lubricant is organic silicone oil, the dispersing agent is an ethylene-acrylic acid copolymer, and the coupling agent is bis (dioctyloxy ester pyrophosphate) ethylene titanium.
According to the multifunctional plastic provided by the related technology, different additives are added into the raw materials, so that the effects of high hardness, high strength, static resistance, aging resistance, scratch resistance, good quality and long service life are achieved.
However, the multifunctional plastic prepared by the formula cannot achieve a good antibacterial effect. In the existing plastic toys, the antibacterial effect of plastic is more and more emphasized because the toys are played by children, and the children sometimes do not pay attention to sanitation. Most of the existing antibacterial plastics are generally added with photocatalyst (also called as photocatalyst) in the formula, and the functions of purifying air, killing bacteria and decomposing viruses are achieved through the photocatalyst.
For example, Chinese patent application No. CN1185292C discloses an antibacterial plastic for toys, which comprises a plastic substrate and a nano titanium dioxide photocatalyst dispersed in the plastic substrate.
Also, for example, chinese patent publication No. CN1539874A discloses an antibacterial, fresh-keeping, and ultraviolet-resistant plastic made of nano materials, which comprises the following components in percentage by weight: 66-78% of polyolefin plastic, 2-5% of montmorillonite, 3-5% of negative ion micro powder, 5-6% of ultraviolet-resistant micro powder, 5-15% of photocatalytic nano powder, 2-5% of inorganic antibacterial powder and 1-3% of titanate or silane coupling agent.
The above-mentioned related art provides plastics each having a sterilizing effect by photocatalyst itselfSo as to achieve the antibacterial effect of the plastic. However, due to the vast majority of photocatalysts (e.g., TiO)2Etc.) is higher than the density of the raw material (polyethylene) of the plastic, so most of the photocatalyst in the plastic settles at the bottom of the plastic in the injection molding process of the plastic, which not only causes no photocatalyst distribution at the other side of the plastic, but also leads most of the photocatalyst to only accumulate inside the plastic even if the photocatalyst amount is increased, and can not reach the other side of the plastic.
And because the photocatalyst needs to be contacted with light to realize the sterilization and antibacterial effects, and the photocatalyst in the plastic can not be contacted with the external light, the antibacterial effect of the plastic provided by the related technology is to be improved, and the photocatalyst is stacked in the plastic to cause a great amount of waste of the photocatalyst.
Disclosure of Invention
In order to solve the problems that the photocatalyst is coated in the plastic and no photocatalyst is distributed on one side of the plastic, the application provides the antibacterial plastic for the toy and the preparation method thereof.
In a first aspect, the application provides an antibacterial plastic for toys, which adopts the following technical scheme:
an antibacterial plastic for toys comprises the following raw materials in parts by weight:
the modified vermiculite powder comprises vermiculite powder and a second photocatalyst positioned in pore passages of the vermiculite powder.
Through adopting above-mentioned technical scheme, this scheme is applicable to the plastic products of slice (thickness is thinner promptly), for example arc plastics lid, plastic casing etc..
In the scheme, the photocatalyst I with the density higher than that of polyethylene and the modified vermiculite powder with the density lower than that of polyethylene are adopted, so that the photocatalyst I can be settled in a molten polyethylene mixture in the polyethylene injection molding process, and a photocatalyst layer is formed on the photocatalyst I at the bottom of a mold (namely the lower surface of a plastic product); the modified vermiculite powder with density less than that of polyethylene will float with the second photocatalyst and form a modified vermiculite powder layer on the top of the mould.
Meanwhile, in the injection molding process, the vermiculite powder expands due to the high temperature in the mold, and the second photocatalyst in the vermiculite powder is released. At the moment, due to the supporting effect and the sealing effect of the vermiculite powder layer, the second photocatalyst can be supported by the vermiculite powder layer, a photocatalyst layer is formed on the upper surface of the plastic, after the plastic is solidified, the upper surface and the lower surface of the sheet plastic can be covered with the photocatalyst layer, and the photocatalyst can play a role in sterilization and antibiosis after being contacted with light.
Cover the photocatalyst respectively at the upper and lower surface of slice plastics through this scheme, the antibacterial effect of plastic products that has promoted at double has solved the photocatalyst moreover and has piled inside the plastics and the extravagant problem in a large number of photocatalysts that cause.
Preferably, the raw materials further comprise 2-5 parts by weight of fluorescent powder.
Through adopting above-mentioned technical scheme, phosphor powder has the effect of initiative luminescence, places it inside plastics as the raw materials, and its illumination has certain penetrability, can radiate to the inside other places of plastics for the inside partial photocatalyst of plastics can be shone and continuously produce the effect of disinfecting and antibiotic, promotes the antibiotic ability of plastics.
Preferably, the fluorescent powder is photoluminescent powder.
By adopting the technical scheme, the photoluminescent powder belongs to one of the existing photoluminescent materials, and can continuously and automatically emit light after being illuminated. In actual life, light can penetrate into the plastic, so that the photoluminescent powder in the plastic can continuously absorb illumination and automatically emit light to the periphery of the photoluminescent powder, and the photocatalyst in the plastic has antibacterial synergy.
Preferably, the photocatalyst I is selected from TiO2、ZnO2、SiO2At least one of (1).
By adopting the technical scheme, the TiO2、ZnO2、SiO2Respectively has a density of 4.26g/cm3、5.606g/cm3、2.2g/cm3While the density of the main filler (polyethylene) of the plastic is 0.962g/cm3，TiO2、ZnO2、SiO2The density of the photocatalyst is larger than that of the polyethylene, so that the photocatalyst can be settled and form a photocatalyst layer at the bottom of the mold in the injection molding process.
Preferably, the second photocatalyst is SiO2。
By adopting the technical scheme, the SiO2Has a density of 2.2g/cm3Compared with other photocatalysts, the photocatalyst has lower density, so the photocatalyst is easy to float in molten polyethylene under the action of vermiculite powder, and is difficult to pass through a vermiculite powder layer and sink to the bottom of a mold, the floating rate of the second photocatalyst can be improved, and the compactness and stability of a top photocatalyst layer can be ensured.
Preferably, the raw materials also comprise 10-15 parts by weight of talcum powder.
By adopting the technical scheme, the talcum powder has good fluidity and leveling property, and can accelerate the floating of the modified vermiculite powder in the injection molding process.
In a second aspect, the application provides a preparation method of an antibacterial plastic for toys, which adopts the following technical scheme: a preparation method of antibacterial plastic for toys comprises the following steps:
step one, preparing modified vermiculite powder;
I. grinding the second photocatalyst by a grinder until the particle size is less than 300 meshes;
II. Putting 40-200 mesh vermiculite powder into a high-temperature stirrer at 160-180 ℃ for stirring, then adding the second photocatalyst obtained in the step I into the high-temperature stirrer, and cooling while stirring to obtain a modified photocatalyst;
and step two, uniformly mixing polyethylene, polyvinyl alcohol, glass fiber, a silane coupling agent, modified vermiculite powder and a first photocatalyst in parts by weight, and then putting the mixture into an injection molding machine for injection molding to obtain the antibacterial plastic.
By adopting the technical scheme, firstly, the particle size of the second photocatalyst is ground to be smaller than the inner diameter of an expanded pore passage of the vermiculite powder, then the vermiculite powder is expanded by a high-temperature stirring mode, the second photocatalyst enters the expanded pore passage, then the vermiculite powder is contracted by a cooling mode, and the second photocatalyst is clamped on the vermiculite powder to obtain the modified photocatalyst.
And step two, the antibacterial plastic can be obtained by utilizing the characteristics of the modified photocatalyst and the characteristics among the raw materials of the plastic in an injection molding mode.
Preferably, the second photocatalyst is ground by a grinder to have a particle size of 500 mesh and the vermiculite powder has a particle size of 200 mesh.
By adopting the technical scheme, the antibacterial effect of the formed top photocatalyst layer is better under the condition of the particle size through tests.
In summary, the present application has the following beneficial effects:
1. because the modified vermiculite powder with the density smaller than that of the polyethylene and the first photocatalyst with the density larger than that of the polyethylene are adopted, and the modified vermiculite powder comprises the vermiculite powder and the second photocatalyst positioned in the pore passage of the vermiculite powder, the effect that the upper surface and the lower surface of the sheet plastic can be covered with the photocatalyst layer is obtained, the antibacterial effect of the plastic product is improved exponentially, and the problem of great waste of the photocatalyst caused by the fact that the photocatalyst is piled inside the plastic is solved.
2. Preferentially adopt phosphor powder in this application, because phosphor powder has the luminous effect of initiative, place plastics inside with it as the raw materials, its illumination has certain penetrability, can radiate to the inside other places of plastics for the inside partial photocatalyst of plastics can be shone and continuously produce the effect of disinfecting and antibiotic, promotes the antibacterial property of plastics.
3. According to the method, the vermiculite powder is expanded through a high-temperature stirring mode, the second photocatalyst enters the expanded pore channel, then the vermiculite powder is contracted through a cooling mode, and the second photocatalyst is clamped on the vermiculite powder to obtain the modified photocatalyst.
Detailed Description
The present application will be described in further detail with reference to examples.
Examples
Example 1: the antibacterial plastic for the toy comprises the raw materials and the parts by weight shown in Table 1, wherein the modified vermiculite powder comprises vermiculite powder and a second photocatalyst positioned in pore passages of the vermiculite powder, and the first photocatalyst in the embodiment is TiO2The second photocatalyst is SiO2。
The antibacterial plastic is prepared by the following steps:
step one, preparing modified vermiculite powder;
I. grinding the second photocatalyst by a grinder until the particle size is 250 meshes;
II. And (2) putting the vermiculite powder with the particle size of 150 meshes into a high-temperature stirrer at 170 +/-10 ℃ for stirring for 15min, and then putting the No. two photocatalyst obtained in the step (I) into the high-temperature stirrer, wherein the weight ratio of the vermiculite powder to the photocatalyst is 1 (3-4), and the weight ratio of the vermiculite powder to the photocatalyst in the embodiment is 1: 3. And cooling to room temperature while stirring to obtain the modified photocatalyst.
And step two, uniformly mixing polyethylene, polyvinyl alcohol, glass fiber, a silane coupling agent, modified vermiculite powder and a first photocatalyst in parts by weight, and then putting the mixture into an injection molding machine for injection molding to obtain the antibacterial plastic.
Examples 2 to 3: an antibacterial plastic for toys, which is different from example 1 in that: the components and parts by weight of the raw materials are shown in table 1.
TABLE 1 Components and parts by weight of examples 1 to 3
Example 4: an antibacterial plastic for toys, which is different from example 1 in that: the raw materials of the fluorescent powder comprise 2 parts by weight of fluorescent powder, the fluorescent powder is photoluminescent powder, the photoluminescent powder belongs to the prior art, is one of photoluminescent materials, has the performance of self-luminescence after light receiving, and is not described again.
Example 5: an antibacterial plastic for toys, which is different from example 1 in that: the fluorescent powder also comprises 4 parts by weight of fluorescent powder, and the fluorescent powder is photoluminescent powder.
Example 6: an antibacterial plastic for toys, which is different from example 1 in that: the raw materials also comprise 5 parts by weight of fluorescent powder, and the fluorescent powder is photoluminescent powder.
Example 7: an antibacterial plastic for toys, which is different from example 1 in that: the first photocatalyst is ZnO2。
Example 8: an antibacterial plastic for toys, which is different from example 1 in that: the first photocatalyst is SiO2。
Example 9: an antibacterial plastic for toys, which is different from example 1 in that: the raw materials also comprise 10 parts by weight of talcum powder.
Example 10: an antibacterial plastic for toys, which is different from example 1 in that: the raw materials also comprise 15 parts of talcum powder by weight.
Example 11: an antibacterial plastic for toys, which is different from example 1 in that: in the first step, the second photocatalyst is ground by a grinder until the particle size is 500 meshes, and the particle size of the vermiculite powder is 200 meshes.
Performance test
Test-antimicrobial test
Test samples: the antibacterial plastics obtained in examples 1 to 11 were used as test samples 1 to 11.
And (3) test results: the antibacterial results of the test samples 1 to 11 are shown in Table 2.
TABLE 2 antibacterial results of test samples 1-11
And (3) data analysis: by combining examples 1-11 and table 2, it can be seen that the plastic obtained by the scheme has excellent antibacterial performance.
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.
Claims (8)
1. The antibacterial plastic for the toy is characterized by comprising the following raw materials in parts by weight:
100-120 parts of polyethylene;
30-40 parts of polyvinyl alcohol;
10-15 parts of glass fiber;
1-3 parts of a silane coupling agent;
3-7 parts of modified vermiculite powder with the density less than that of polyethylene;
3-5 parts of a first photocatalyst with the density higher than that of polyethylene;
the modified vermiculite powder comprises vermiculite powder and a second photocatalyst positioned in pore passages of the vermiculite powder.
2. The antibacterial plastic for toys as claimed in claim 1, wherein: the fluorescent powder also comprises 2-5 parts by weight of fluorescent powder.
3. The antibacterial plastic for toys as claimed in claim 2, wherein said phosphor is a photoluminescent phosphor.
4. The antibacterial plastic for toys as claimed in claim 1, wherein said photocatalyst is TiO2、ZnO2、SiO2At least one of (1).
5. The antibacterial plastic for toys as claimed in claim 1, wherein said second photocatalyst is SiO2。
6. The antibacterial plastic for toys as claimed in claim 1, wherein the raw material further comprises 10-15 parts by weight of talc.
7. A method for preparing an antibacterial plastic for toys as claimed in any one of claims 1 to 6, comprising the steps of:
step one, preparing modified vermiculite powder;
grinding the second photocatalyst by a grinder until the particle size is less than 300 meshes;
putting 40-200 mesh vermiculite powder into a high-temperature stirrer at 160-180 ℃ for stirring, then adding the second photocatalyst obtained in the step I into the high-temperature stirrer, and cooling while stirring to obtain a modified photocatalyst;
and step two, uniformly mixing polyethylene, polyvinyl alcohol, glass fiber, a silane coupling agent, modified vermiculite powder and a first photocatalyst in parts by weight, and then putting the mixture into an injection molding machine for injection molding to obtain the antibacterial plastic.
8. The method of claim 7, wherein in the first step, the second photocatalyst is ground by a grinder to have a particle size of 500 mesh, and the vermiculite powder has a particle size of 200 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110596901.1A CN113308039B (en) | 2021-05-28 | Antibacterial plastic for toy and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110596901.1A CN113308039B (en) | 2021-05-28 | Antibacterial plastic for toy and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113308039A true CN113308039A (en) | 2021-08-27 |
| CN113308039B CN113308039B (en) | 2024-07-02 |
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