CN112029184A - Antibacterial casting film and preparation method and application thereof - Google Patents
Antibacterial casting film and preparation method and application thereof Download PDFInfo
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- CN112029184A CN112029184A CN202010852903.8A CN202010852903A CN112029184A CN 112029184 A CN112029184 A CN 112029184A CN 202010852903 A CN202010852903 A CN 202010852903A CN 112029184 A CN112029184 A CN 112029184A
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- 238000005266 casting Methods 0.000 title claims abstract description 74
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000002245 particle Substances 0.000 claims abstract description 33
- 238000001816 cooling Methods 0.000 claims abstract description 26
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 19
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 19
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 19
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 19
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 18
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 17
- 229920006728 mPE Polymers 0.000 claims abstract description 15
- 239000004595 color masterbatch Substances 0.000 claims abstract description 14
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims abstract description 3
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims abstract 6
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract 2
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- 239000012752 auxiliary agent Substances 0.000 claims description 31
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- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 26
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 23
- MBHRHUJRKGNOKX-UHFFFAOYSA-N [(4,6-diamino-1,3,5-triazin-2-yl)amino]methanol Chemical compound NC1=NC(N)=NC(NCO)=N1 MBHRHUJRKGNOKX-UHFFFAOYSA-N 0.000 claims description 20
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 19
- 239000011259 mixed solution Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
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- 239000004599 antimicrobial Substances 0.000 claims 1
- 239000002939 oilproofing Substances 0.000 claims 1
- 230000003115 biocidal effect Effects 0.000 abstract description 3
- 238000007766 curtain coating Methods 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- 239000003242 anti bacterial agent Substances 0.000 description 14
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 11
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- 238000012360 testing method Methods 0.000 description 9
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- 230000001580 bacterial effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
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- 241000588724 Escherichia coli Species 0.000 description 1
- 241000191070 Escherichia coli ATCC 8739 Species 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
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Classifications
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
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- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
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- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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Abstract
The application discloses an antibacterial casting film and a preparation method and application thereof. The antibacterial casting film is prepared from the following raw materials in parts by weight: 3-8 parts of color master batch, 20-28 parts of LDPE (Low-Density polyethylene), 35-40 parts of LLDPE (Linear Low-Density polyethylene), 20-30 parts of mPE (polyethylene glycol), 3-7 parts of EVA (ethylene vinyl acetate), and 2-4 parts of nano silver particles. The preparation method of the antibacterial casting film comprises the following steps: (1) preparing materials; (2) extruding; (3) casting; (4) cooling; (5) molding; (6) corona and edge cutting and winding. The application discloses antibiotic curtain coating membrane can be used to incasement or tablecloth, and it has the good advantage of bacterinertness.
Description
Technical Field
The application relates to the field of casting films, in particular to an antibacterial casting film and a preparation method and application thereof.
Background
The cast polyethylene film is produced mainly by fast quenching molten polyethylene and has single layer film and multilayer film. The flat extrusion type polyethylene film prepared by the tape casting method has the remarkable advantages of high production speed, high product quality, high processing efficiency and the like. The polyethylene casting film has very wide application in the industries of bags, tablecloths and the like, and the materials used in the bags and the tablecloths have certain requirements on water resistance and oil resistance, and also put forward higher requirements on the bacteriostatic function of the casting film along with the increasing attention of people on food sanitation and safety.
Chinese patent CN110204816A discloses a tearable coating, which contains antibacterial agent tea polyphenol and chitin fiber, and shows a certain inhibition effect on bacteria and fungi.
However, the above applications do not perform bacteriostatic tests on specific bacteria and fungi species, nor do they perform water and oil repellency tests, and have certain disadvantages in general.
Disclosure of Invention
To the not good problem of the antibacterial performance of casting film that prior art exists, the first aim at of this application provides an antibiotic casting film, antibiotic casting film has the good advantage of bacterinertness.
A second object of the present application is to provide a method for producing an antibacterial casting film, which has an advantage that the produced casting film has good antibacterial properties.
A third object of the present application is to provide a use of an antibacterial casting film having advantages suitable for manufacturing a bag lining and a tablecloth.
In order to achieve the first object, the present application provides the following technical solutions: an antibacterial casting film is prepared from the following raw materials in parts by weight: 3-8 parts of color master batch; 20-28 parts of LDPE; 35-40 parts of LLDPE; 20-30 parts of mPE; 3-7 parts of EVA; 2-4 parts of nano silver particles.
By adopting the technical scheme, the cast film has better tensile strength, water resistance and oil resistance because three different polyethylenes, namely high-pressure low-density polyethylene LDPE, linear low-density polyethylene LLDPE and metallocene polyethylene mPE, are compounded with ethylene-vinyl acetate copolymer EVA; in addition, the casting film has good antibacterial performance due to the addition of nano silver particles as an antibacterial agent.
Furthermore, the particle size of the nano silver particles is 20-40 nm.
By adopting the technical scheme, the particle size of the nano silver particles is specifically limited, so that the antibacterial effect of the casting film is further improved.
Furthermore, the antibacterial casting film also comprises a waterproof and oilproof auxiliary agent prepared from 0.5-2 parts of hydroxymethyl melamine, 0.4-0.8 part of lotus leaf fiber and 0.01-0.02 part of silane coupling agent.
By adopting the technical scheme, as the methylol melamine, the lotus leaf fiber and the silane coupling agent are added as the waterproof and oil-proof agent, the waterproof and oil-proof effects of the cast film are further improved by compounding the methylol melamine, the lotus leaf fiber and the silane coupling agent.
Further, the preparation method of the water-proof and oil-proof auxiliary agent comprises the following steps: (1) weighing the raw materials according to the proportion, and crushing the lotus leaf fiber to 60 meshes; (2) uniformly mixing the methylol melamine and the silane coupling agent, adding the crushed lotus leaf fiber, and stirring for 1-2 hours at the temperature of 90-100 ℃ to obtain a mixed solution; (3) and filtering and cooling the mixed solution to obtain the waterproof and oilproof auxiliary agent.
By adopting the technical scheme, the waterproof and oilproof auxiliary agent is prepared into the mixed emulsion in advance, so that the mixed emulsion is favorably and uniformly mixed with other materials of the casting film, the compatibility of the raw materials is improved, and the prepared casting film is uniform in thickness and stable in property.
Further, the antibacterial casting film is prepared from the following raw materials in parts by weight: 5 parts of color master batch, 25 parts of LDPE, 37.5 parts of LLDPE, 25 parts of mPE, 5 parts of EVA, 2.5 parts of nano-silver particles, 1 part of methylolmelamine, 0.6 part of lotus leaf fiber and 0.01 part of silane coupling agent.
By adjusting the proportion of each raw material in the casting film, the casting film with better antibacterial effect and waterproof and oil-proof effects is obtained.
In order to achieve the second object, the present application provides the following technical solutions:
a method for preparing an antibacterial casting film comprises the following steps:
(1) preparing materials: weighing color master batch, LDPE, LLDPE, mPE, EVA and nano silver particles according to the proportion, and uniformly mixing to obtain a base material; if the waterproof and oilproof auxiliary agent is contained, the waterproof and oilproof auxiliary agent is prepared first and then is mixed with the base material and stirred uniformly;
(2) extruding: the temperature is adjusted to 230 ℃ and 240 ℃, and the temperature is kept for 3 to 4 hours;
(3) casting: sequentially carrying out the processes of connection, filtration and casting, wherein the temperature of the connection process is 190 ℃ plus 180 ℃, the temperature of the filtration process is 250 ℃ plus 240 ℃, and the temperature of the casting process is 215 ℃ plus 205 ℃;
(4) cooling;
(5) molding;
(6) corona and trimming rolling: and carrying out edge cutting and winding after corona treatment.
By adopting the technical scheme, the prepared casting film has good transparency, glossiness, flatness, uniformity and better tensile strength by adjusting the parameters of the extrusion and casting processes.
Furthermore, an embossing process is carried out between the steps (4) and (5).
By adopting the technical scheme, the antibacterial casting films with different patterns can be prepared by adding the embossing process.
In order to achieve the third object, the present application provides the following technical solutions:
the application of the antibacterial casting film is that the antibacterial casting film is used in luggage or tablecloth.
In summary, the present application has at least one of the following advantages:
firstly, the antibacterial casting film has good tensile strength, water resistance and oil resistance because three different polyethylenes, namely high-pressure low-density polyethylene LDPE, linear low-density polyethylene LLDPE and metallocene polyethylene mPE, are compounded with ethylene-vinyl acetate copolymer EVA; in addition, due to the addition of the antibacterial agent nano silver particles, the antibacterial casting film also has good antibacterial performance.
Secondly, the waterproof and oilproof auxiliary agents, namely the methylol melamine, the lotus leaf fiber and the silane coupling agent are added, so that better waterproof and oilproof effects are obtained.
Thirdly, the method of the application enables the prepared casting film to have good tensile strength, water resistance and oil resistance by adjusting parameters of extrusion and casting processes.
Detailed Description
The present application will be described in further detail with reference to examples.
The raw materials and reagents used in the following preparation examples, comparative examples and application examples are all commercial products; wherein the color master batch is white color master batch, the nano silver particles are purchased from Shanghai run river nanotechnology Co., Ltd, the melt index of LDPE, LLDPE and mPE is 2g/10min, and the melt index is measured under the condition of 190 ℃ and 2.16kg load.
Preparation of water-and oil-repellent auxiliaries
Preparation example 1
The preparation method of the waterproof and oilproof auxiliary agent comprises the following steps:
(1) weighing 0.5kg of hydroxymethyl melamine, 0.4kg of lotus leaf fiber and 0.01kg of silane coupling agent KH-550, and crushing the lotus leaf fiber to 60 meshes; (2) uniformly mixing the methylol melamine and the silane coupling agent KH-550, adding the crushed lotus leaf fiber, and stirring for 2 hours at the temperature of 90 ℃ to obtain a mixed solution; (3) and cooling the mixed solution, and sieving the mixed solution by a 100-mesh sieve to obtain the waterproof and oilproof auxiliary agent.
Preparation example 2
The preparation method of the waterproof and oilproof auxiliary agent comprises the following steps:
(1) weighing 2kg of hydroxymethyl melamine, 0.8kg of lotus leaf fiber and 0.02kg of silane coupling agent KH-550, and crushing the lotus leaf fiber to 80 meshes; (2) uniformly mixing the methylol melamine and the silane coupling agent KH-550, adding the crushed lotus leaf fiber, and stirring for 1h at the temperature of 100 ℃ to obtain a mixed solution; (3) and cooling the mixed solution, and sieving the mixed solution by a 100-mesh sieve to obtain the waterproof and oilproof auxiliary agent.
Preparation example 3
The preparation method of the waterproof and oilproof auxiliary agent comprises the following steps:
(1) weighing 1kg of hydroxymethyl melamine, 0.6kg of lotus leaf fiber and 0.01kg of silane coupling agent KH-550, and crushing the lotus leaf fiber to 70 meshes; (2) uniformly mixing the methylol melamine and the silane coupling agent KH-550, adding the crushed lotus leaf fiber, and stirring for 1.5 hours at the temperature of 95 ℃ to obtain a mixed solution; (3) and cooling the mixed solution, and sieving the mixed solution by a 100-mesh sieve to obtain the waterproof and oilproof auxiliary agent.
Preparation example 4
The preparation method of the waterproof and oilproof auxiliary agent comprises the following steps:
(1) weighing 1.6kg of methylol melamine and 0.01kg of silane coupling agent KH-550; (2) uniformly mixing methylol melamine and a silane coupling agent KH-550, and stirring for 1.5 hours at the temperature of 95 ℃ to obtain a mixed solution; (3) and cooling the mixed solution, and sieving the mixed solution by a 100-mesh sieve to obtain the waterproof and oilproof auxiliary agent.
Preparation example 5
The preparation method of the waterproof and oilproof auxiliary agent comprises the following steps:
(1) weighing 1.6kg of lotus leaf fiber and 0.01kg of silane coupling agent KH-550, and crushing the lotus leaf fiber to 70 meshes; (2) adding the crushed lotus leaf fibers into a silane coupling agent KH-550, and stirring for 1.5 hours at the temperature of 95 ℃ to obtain a mixed solution; (3) and cooling the mixed solution, and sieving the mixed solution by a 100-mesh sieve to obtain the waterproof and oilproof auxiliary agent.
Examples
Example 1
An antibacterial cast film is prepared from the following raw materials: 3kg of color master batch, 28kg of LDPE, 40kg of LLDPE, 20kg of mPE, 7kg of EVA and 2kg of antibacterial agent, wherein the antibacterial agent is nano silver particles with the particle size of 30 nm. The preparation method comprises the following steps:
(1) preparing materials: weighing color master batch, LDPE, LLDPE, mPE, EVA and nano silver particles according to the proportion, and uniformly mixing to obtain a base material;
(2) extruding: adjusting the temperature to 230 ℃, and keeping for 4 hours;
(3) casting: sequentially carrying out the working procedures of connection, filtration and casting according to the sequence, wherein the temperature of the connection working procedure is 180 ℃, the temperature of the filtration working procedure is 240 ℃, the temperature of the casting working procedure is 205 ℃, the air flow rate of an air knife is controlled to be 1.5m/s, the rotating angular speed of a traction roller is adjusted to be 0.9rad/s, and the film is drawn to a cooling device for cooling;
(4) and (3) cooling: the cooling device comprises a primary cooling roller and a secondary cooling roller, wherein the temperature of the primary cooling roller is-5 ℃, and the temperature of the secondary cooling roller is 8 ℃;
(5) molding;
(6) corona and trimming rolling: the corona device is a 50mm silica gel roller, the output power is 8kw, and the edge cutting and rolling are carried out after the corona treatment, so that the antibacterial casting film with the thickness of 0.15mm is obtained.
Example 2
An antibacterial cast film, different from example 1, was made from the following raw materials: 5kg of color master batch, 25kg of LDPE, 37.5kg of LLDPE, 25kg of mPE, 5kg of EVA and 2.5kg of antibacterial agent.
Example 3
An antibacterial cast film, different from example 1, was made from the following raw materials: 8kg of color master batch, 20kg of LDPE, 35kg of LLDPE, 30kg of mPE, 3kg of EVA and 4kg of antibacterial agent.
Example 4
An antibacterial casting film, different from example 2, the particle diameter of nano silver particles was 20 nm.
Example 5
An antibacterial casting film, different from example 2, the particle diameter of the nano silver particles was 40 nm.
Example 6
An antibacterial casting film, different from example 2, the particle diameter of nano silver particles was 10 nm.
Example 7
An antibacterial casting film, different from example 2, the particle diameter of nano silver particles was 50 nm.
Example 8
An antibacterial casting film is different from the embodiment 2 in that the raw materials also comprise the waterproof and oilproof auxiliary agent obtained in the preparation example 1, wherein the waterproof and oilproof auxiliary agent is added in the step (1) and is mixed with a base material and stirred uniformly.
Example 9
An antibacterial casting film is different from the embodiment 2 in that the raw materials further comprise the waterproof and oilproof auxiliary agent obtained in the preparation example 2, wherein the waterproof and oilproof auxiliary agent is added in the step (1) and is mixed with a base material and stirred uniformly.
Example 10
An antibacterial casting film is different from the embodiment 2 in that the raw materials also comprise the waterproof and oilproof auxiliary agent obtained in the preparation example 3, wherein the waterproof and oilproof auxiliary agent is added in the step (1) and is mixed with a base material and stirred uniformly.
Example 11
An antibacterial cast film is prepared from the following raw materials: 8kg of color master batch, 20kg LDPE, 35kg of LLDPE, 30kg of mPE, 3kg of EVA and 4kg of antibacterial agent, wherein the antibacterial agent is nano silver particles with the particle size of 30 nm. The preparation method comprises the following steps:
(1) preparing materials: weighing the raw materials according to the proportion and uniformly mixing;
(2) extruding: adjusting the temperature to 240 ℃, and keeping for 3 hours;
(3) casting: sequentially carrying out the working procedures of connection, filtration and casting according to the sequence, wherein the temperature of the connection working procedure is 190 ℃, the temperature of the filtration working procedure is 250 ℃, the temperature of the casting working procedure is 215 ℃, the air flow rate of the air knife is controlled to be 1.5m/s, the rotating angular speed of the traction roller is adjusted to be 0.9rad/s, and the film is drawn to a cooling device for cooling;
(4) and (3) cooling: the cooling device comprises a primary cooling roller and a secondary cooling roller, wherein the temperature of the primary cooling roller is 0 ℃, and the temperature of the secondary cooling roller is 10 ℃;
(5) molding;
(6) corona and trimming rolling: the corona device is a 50mm silica gel roller, the output power is 8kw, and the edge cutting and rolling are carried out after the corona treatment, so that the antibacterial casting film with the thickness of 0.15mm is obtained.
Comparative example
Comparative example 1
A cast film obtained by the production method of example 1 in CN 110204816A.
Comparative example 2
A casting film, different from the embodiment 2, the antibacterial agent is tea polyphenol and chitin fiber, the mass ratio of the tea polyphenol to the chitin is 1: 10, the total amount of the antibacterial agent is 2.5 kg.
Comparative example 3
An antibacterial casting film is different from the embodiment 2 in that the raw materials also comprise the waterproof and oilproof auxiliary agent obtained in the preparation example 4, wherein the waterproof and oilproof auxiliary agent is added in the step (1) and is mixed with a base material and stirred uniformly.
Comparative example 4
An antibacterial casting film is different from the embodiment 2 in that the raw materials also comprise the waterproof and oilproof auxiliary agent obtained in the preparation example 5, wherein the waterproof and oilproof auxiliary agent is added in the step (1) and is mixed with a base material and stirred uniformly.
Comparative example 5
Commercially available cast films with a thickness of 2 mm.
Application example
Application example 1
An antibacterial bag lining, comprising an embossing layer and the casting film layer prepared in the embodiment 2, wherein the embossing layer is 1mm in thickness, the casting film layer is 0.15mm in thickness, and the embossing layer and the casting film layer are bonded together through waterborne polyurethane.
Application example 2
An antibacterial tablecloth comprising an embossed layer and the casting film prepared in example 2, wherein the embossed layer has a thickness of 2mm, the casting film has a thickness of 0.15mm, and the embossed layer and the casting film are bonded together by aqueous polyurethane.
Performance test
1. Antibacterial test
The antibacterial rate is ((B-C)/B) × 100%
Wherein B is the average value of the number of bacteria 24h after inoculation of the control sample (CFU/cm)2)；
C is the average value of the number of bacteria 24h after sample inoculation (CFU/cm)2)。
2. Water and oil repellency test
3. Tensile strength at break and elongation at break tests
Detection method/test method
1. The antibacterial rate is as follows: the detection is carried out by adopting an ISO 22196:2011 method, wherein the detection strains comprise escherichia coli ATCC8739, staphylococcus aureus ATCC6538P and enterococcus faecalis ATCC33186, and the concentration of an escherichia coli inoculation bacterial liquid is 1.3 multiplied by 106CFU/mL, the inoculation amount is 0.2mL, the staphylococcus aureus inoculation bacterial liquid concentration is 9.8 multiplied by 105CFU/mL, the inoculation amount is 0.2mL, and the concentration of enterococcus faecalis inoculated bacterial liquid is 1.2 multiplied by 106CFU/mL, the inoculum size is 0.2 mL. The control was a general commercially available casting film to which no antibacterial agent was added, and the samples were the products of the antibacterial casting films and application examples of all examples, comparative examples.
2. And (3) testing the waterproof performance: the water resistance test was carried out using the method of standard AATCC-22-2010.
3. Oil resistance test: the oil resistance test was carried out using the method of standard AATCC-118-2013.
4. Tensile strength at break and elongation at break: the tensile strength at break and elongation at break were examined with reference to GB 13022-1991.
TABLE 1 antimicrobial, Water and oil repellency results
TABLE 2 breaking Strength, elongation at Break results
It can be seen from the combination of examples 1 to 11 and comparative examples 1 to 2 and table 1 that the kind of the antibacterial agent has a large influence on the antibacterial effect of the casting film, and the antibacterial effect of the nano silver particles is greatly improved compared to the antibacterial effect of the mixture of tea polyphenol and chitin fiber. In addition, combining examples 1-11 and comparative example 5, it can be seen that the thickness of the cast film incorporating the nanosilver particles is much reduced, but the breaking strength and elongation at break are similar to or better than those of commercially available cast films.
Combining examples 4-7 and example 2 and combining table 1, it can be seen that the particle size of the nano silver particles also has an effect on the antibacterial effect, but the degree of the effect is not so great, and the antibacterial effect of more than 99% can be achieved.
It can be seen from the combination of examples 8 to 10 and example 2 and table 1 that the addition of the water and oil repellent auxiliary had a large influence on the water and oil repellency of the cast film, improving the water and oil repellency of the cast film, but did not decrease the antibacterial property of the cast film. By combining examples 8-10 and comparative examples 3-4 with Table 1, it can be seen that the water-and oil-repellent effects of the methylol melamine alone or the lotus leaf fiber alone are inferior to those of the methylol melamine and the lotus leaf fiber, indicating that there is a synergistic effect between the methylol melamine and the lotus leaf fiber.
As can be seen by combining example 11 and example 3 with table 2, the production method of the present application has little influence on the antibacterial effect of the casting film.
By combining application examples 1-2 and tables 1 and 2, the casting film prepared by the method still has good antibacterial performance, water resistance and oil resistance when being used in the interior of a case or a tablecloth.
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 casting film is characterized by being prepared from the following raw materials in parts by weight: 3-8 parts of color master batch, 20-28 parts of LDPE (Low-Density polyethylene), 35-40 parts of LLDPE (Linear Low-Density polyethylene), 20-30 parts of mPE (polyethylene glycol), 3-7 parts of EVA (ethylene vinyl acetate), and 2-4 parts of nano silver particles.
2. Antibacterial cast film according to claim 1, characterized in that the particle size of the nano-silver particles is 20-40 nm.
3. The antibacterial casting film according to claim 1, further comprising a water and oil repellent auxiliary agent made of 0.5 to 2 parts of methylol melamine, 0.4 to 0.8 part of lotus leaf fiber, and 0.01 to 0.02 part of silane coupling agent.
4. The antibacterial casting film according to claim 3, wherein the preparation method of the water and oil proofing auxiliary comprises the following steps: (1) weighing the raw materials according to the proportion, and crushing the lotus leaf fiber to 60-80 meshes; (2) uniformly mixing the methylol melamine and the silane coupling agent, adding the crushed lotus leaf fiber, and stirring for 1-2 hours at the temperature of 90-100 ℃ to obtain a mixed solution; (3) and cooling and filtering the mixed solution to obtain the waterproof and oilproof auxiliary agent.
5. The antimicrobial cast film of claim 3, wherein the antimicrobial cast film is made from raw materials comprising, by weight: 5 parts of color master batch, 25 parts of LDPE, 37.5 parts of LLDPE, 25 parts of mPE, 5 parts of EVA, 2.5 parts of nano-silver particles, 1 part of methylolmelamine, 0.6 part of lotus leaf fiber and 0.01 part of silane coupling agent.
6. A method of producing an antibacterial casting film according to any one of claims 1 to 5, characterized by comprising the steps of:
(1) preparing materials: weighing color master batch, LDPE, LLDPE, mPE, EVA and nano silver particles according to the proportion, and uniformly mixing to obtain a base material; if the waterproof and oilproof auxiliary agent is contained, the waterproof and oilproof auxiliary agent is prepared first and then is mixed with the base material and stirred uniformly;
(2) extruding: the temperature is adjusted to 230 ℃ and 240 ℃, and the temperature is kept for 3 to 4 hours;
(3) casting: sequentially carrying out the processes of connection, filtration and casting, wherein the temperature of the connection process is 190 ℃ plus 180 ℃, the temperature of the filtration process is 250 ℃ plus 240 ℃, and the temperature of the casting process is 215 ℃ plus 205 ℃;
(4) cooling;
(5) molding;
(6) corona and trimming rolling: and carrying out edge cutting and winding after corona treatment.
7. The method of claim 6, wherein an embossing step is further provided between steps (4) and (5).
8. Use of an antimicrobial cast film according to any of claims 1 to 5, characterised in that it is used in luggage interiors or tablecloths.
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| CN202010852903.8A CN112029184A (en) | 2020-08-22 | 2020-08-22 | Antibacterial casting film and preparation method and application thereof |
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| CN202010852903.8A CN112029184A (en) | 2020-08-22 | 2020-08-22 | Antibacterial casting film and preparation method and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116478434A (en) * | 2023-05-09 | 2023-07-25 | 深圳市宇田新材料科技有限公司 | Preparation method of antibacterial polyphenylene sulfide film |
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