Antibacterial plastic film and preparation method thereof

Abstract

The invention relates to the technical field of plastic films, and particularly discloses an antibacterial plastic film and a preparation method thereof. The antibacterial plastic film is prepared from the following components in parts by mass: 100 parts of polypropylene resin; 0.45 to 0.55 part of an antibacterial agent; 5.89 to 6.31 parts of an auxiliary agent; the antibacterial agent is a compound of coconut oil, nigella glandulifera seed oil, evening primrose oil, canola oil and purple perilla seed oil. The plastic film has the advantage that the strength and the antibacterial property of the plastic film are improved at the same time.

Description

Technical Field

[0001] The invention relates to the field of plastic films, in particular to an antibacterial plastic film and a preparation method thereof. Background Art

[0002] Medical devices are the main tools used in medical treatment, including a large number of medical consumables. For the sake of safety and hygiene, medical consumables are basically disposable. Therefore, the demand for medical consumables is large, and a large number of medical consumables cannot be made and used immediately. Therefore, it is usually necessary to store medical consumables in large quantities. Therefore, medical consumables usually need to be packaged in medical plastic film to avoid contamination during transportation and storage.

[0003] Plastic film is a film made of plastic. Since plastic lacks antibacterial properties, conventional plastic film is difficult to meet the needs of long-term antibacterial during the storage of medical consumables. Therefore, antibacterial agents are usually added to improve the antibacterial properties of plastic film. However, conventional silver ion antibacterial agents will cause the physical properties of plastic film to deteriorate, making the plastic film easy to break. Once the plastic film is damaged, the medical consumables inside will be infected and become scrapped. Therefore, there is still room for improvement. Summary of the invention

[0004] In order to simultaneously improve the strength and antibacterial properties of a plastic film, the present application provides an antibacterial plastic film and a preparation method thereof.

[0005] In a first aspect, the present application provides an antibacterial plastic film, which adopts the following technical solution: An antibacterial plastic film is prepared from the following components in parts by weight: 100 parts of polypropylene resin; Antibacterial agent 0.45-0.55 parts; Additives 5.89-6.31 parts; The antibacterial agent is a compound of coconut oil, black cumin seed oil, evening primrose oil, canola oil and perilla seed oil.

[0006] By adopting the above technical scheme, by specifically selecting the antibacterial agent as a compound of coconut oil, black cumin seed oil, evening primrose oil, canola oil, and perilla seed oil, under the action of coconut oil, black cumin seed oil, evening primrose oil, canola oil, and perilla seed oil, the antibacterial plastic film has a good antibacterial effect, and the antibacterial effect is very long-lasting, which can protect medical consumables for a long time and make the medical consumables not easy to be infected.

[0007] The addition of coconut oil, black cumin seed oil, evening primrose oil, canola oil, and perilla seed oil will not only not affect the strength of the plastic film, but can also improve the strength of the plastic film to a certain extent, making the plastic film less likely to break, and can better and permanently protect medical consumables and better prevent medical consumables from infection.

[0008] By adding coconut oil, black cumin seed oil, evening primrose oil, canola oil, and perilla seed oil to enhance the antibacterial properties of the plastic film, the light transmittance of the plastic film can also be better maintained, making the plastic film relatively transparent and better meeting the packaging needs of medical consumables.

[0009] Preferably, the mass ratio of the coconut oil, black cumin seed oil, evening primrose oil, canola oil and perilla seed oil is 0.15-0.17: 0.09-0.11: 0.03-0.05: 0.12-0.14: 0.06-0.08.

[0010] By adopting the above technical scheme and specifically selecting the mass ratio of coconut oil, black cumin seed oil, evening primrose oil, canola oil and perilla seed oil, the coconut oil, black cumin seed oil, evening primrose oil, canola oil and perilla seed oil are combined in a specific ratio, which can better exert the synergistic effect, make the antibacterial effect better, and improve the effect of improving the strength of the plastic film.

[0011] Preferably, the auxiliary agent is a compound of a masterbatch, an anti-blocking agent and a gloss regulator.

[0012] By adopting the above technical solution and adding masterbatch, opening agent and gloss regulator, the plastic film can be made more beautiful in appearance, easier to open, easier to operate and of better quality.

[0013] Preferably, the mass ratio of the masterbatch, the anti-blocking agent and the gloss regulator is 3.9-4.1:1.9-2.1:0.09-0.11.

[0014] By adopting the above technical solution and specifically selecting the mass ratio of the masterbatch, the anti-blocking agent and the gloss regulator, the plastic film can have better performance and better quality.

[0015] Preferably, the masterbatch is a PE masterbatch.

[0016] By adopting the above technical solution and specifically selecting the PE masterbatch, the masterbatch can be more evenly dispersed, thereby reducing the impact on the quality of the plastic film.

[0017] Preferably, the opening agent is erucamide.

[0018] By adopting the above technical solution and specifically selecting erucic acid amide, the lubrication effect is better, and it is not easy to affect the light transmittance of the plastic, so that the plastic film can better maintain a more transparent appearance and the contents in the package can be better observed.

[0019] Preferably, the gloss regulator is white mineral oil.

[0020] By adopting the above technical solution and specifically selecting white mineral oil, the plastic film can be made more glossy and more beautiful.

[0021] In a second aspect, the present application provides a method for preparing an antibacterial plastic film, using the following technical solution: A method for preparing the above-mentioned antibacterial plastic film comprises the following steps: Step 1), mixing polypropylene resin, antibacterial agent and auxiliary agent uniformly to obtain a premix; Step 2), extruding and blow-molding the premix to obtain an antibacterial plastic film.

[0022] By adopting the above technical solution, the prepared resistant plastic film has good antibacterial properties and better physical properties, can durably protect medical consumables, and makes medical consumables less susceptible to infection during transportation and long-term storage, and has high economic value.

[0023] Preferably, in step 2), the premix is ​​kept in the extruder for 10-15 minutes.

[0024] By adopting the above technical solution and controlling the time of the premix in the extruder to 10-15 minutes, the antibacterial agent and the auxiliary agent can be fully mixed into the polypropylene resin, so that the modification effect is better and the performance of the obtained plastic film is more stable.

[0025] In summary, this application has the following beneficial effects: 1. Since the present application specifically selects the antibacterial agent to be a compound of coconut oil, black cumin seed oil, evening primrose oil, canola oil, and perilla seed oil, under the action of coconut oil, black cumin seed oil, evening primrose oil, canola oil, and perilla seed oil, the antibacterial plastic film has a good antibacterial effect, and can also improve the strength of the plastic film to a certain extent, making the plastic film less likely to be damaged, and can better and permanently protect medical consumables, better avoid infection of medical consumables, and can also better maintain the light transmittance of the plastic film, so that the plastic film remains in a relatively transparent state, better meeting the packaging requirements of medical consumables.

[0026] 2. In the present application, it is preferred to specifically select the mass ratio of coconut oil, black cumin seed oil, evening primrose oil, canola oil and perilla seed oil so that coconut oil, black cumin seed oil, evening primrose oil, canola oil and perilla seed oil are matched in a specific ratio, which can better exert the synergistic effect, make the antibacterial effect better, and improve the effect of improving the strength of the plastic film. DETAILED DESCRIPTION

[0027] The present application is further described in detail below with reference to the embodiments.

[0028] Example 1 An antibacterial plastic film is made from the following components: Polypropylene resin, coconut oil, black cumin seed oil, evening primrose oil, canola oil, perilla seed oil, PE masterbatch, erucamide, white mineral oil.

[0029] The polypropylene resin was purchased from Sinopec, model K7726.

[0030] Coconut oil was purchased from Hongxing Natural Medicinal Spice Oil Factory in Jishui County, and the preparation process was physical cold pressing.

[0031] Black cumin seed oil was purchased from Yikan Natural Spice Oil Refinery in Jishui County, and the preparation process was physical cold pressing.

[0032] Evening primrose oil was purchased from Yikang Natural Spice Oil Refinery in Jishui County, and the preparation process was physical cold pressing.

[0033] Rapeseed oil was purchased from Hongxing Natural Medicinal Spice Oil Factory in Jishui County, and the preparation process was physical cold pressing.

[0034] Perilla seed oil was purchased from Yikan Natural Spice Oil Refinery in Jishui County, and the preparation process was physical cold pressing.

[0035] PE masterbatch was purchased from Dongguan Zhengtao Plastic Co., Ltd., item number: HH9240IKNKJU.

[0036] Erucamide was purchased from Jinan Xiangfeng Weiye Chemical Co., Ltd., CAS No.: 112-84-5.

[0037] White mineral oil was purchased from Shandong Taichang Petrochemical Technology Co., Ltd., 5# white mineral oil.

[0038] The preparation method of the antibacterial plastic film comprises the following steps: Step 1), 100kg polypropylene resin, 0.15kg coconut oil, 0.09kg black cumin seed oil, 0.03kg evening primrose oil, 0.12kg canola oil, 0.06kg perilla seed oil, 3.9kg PE masterbatch, 1.9kg erucic acid amide, and 0.09kg white mineral oil are put into a stirring tank, the speed is 800r / min, stirred for 5min, and mixed evenly to obtain a premix.

[0039] Step 2), the premix is ​​put into a twin screw extruder, and the processing temperature in zones I-XI of the twin screw extruder is controlled to be set to: 165°C, 165°C, 175°C, 185°C, 195°C, 195°C, 195°C, 200°C, 200°C, 200°C, and the screw speed is controlled to make the time of the premix in the twin screw extruder (calculated from entering the feed port to extrusion from the extruder head) be 10min, and after extruding the tube embryo, it is blow-molded by a blow molding machine to obtain an antibacterial plastic film with a thickness of 0.2mm.

[0040] Example 2 An antibacterial plastic film is made from the following components: Polypropylene resin, coconut oil, black cumin seed oil, evening primrose oil, canola oil, perilla seed oil, PE masterbatch, erucamide, white mineral oil.

[0041] The polypropylene resin was purchased from Sinopec, model K7726.

[0042] Coconut oil was purchased from Hongxing Natural Medicinal Spice Oil Factory in Jishui County, and the preparation process was physical cold pressing.

[0043] Black cumin seed oil was purchased from Yikan Natural Spice Oil Refinery in Jishui County, and the preparation process was physical cold pressing.

[0044] Evening primrose oil was purchased from Yikang Natural Spice Oil Refinery in Jishui County, and the preparation process was physical cold pressing.

[0045] Rapeseed oil was purchased from Hongxing Natural Medicinal Spice Oil Factory in Jishui County, and the preparation process was physical cold pressing.

[0046] Perilla seed oil was purchased from Yikan Natural Spice Oil Refinery in Jishui County, and the preparation process was physical cold pressing.

[0047] PE masterbatch was purchased from Dongguan Zhengtao Plastic Co., Ltd., item number: HH9240IKNKJU.

[0048] Erucamide was purchased from Jinan Xiangfeng Weiye Chemical Co., Ltd., CAS No.: 112-84-5.

[0049] White mineral oil was purchased from Shandong Taichang Petrochemical Technology Co., Ltd., 5# white mineral oil.

[0050] The preparation method of the antibacterial plastic film comprises the following steps: Step 1), 100kg polypropylene resin, 0.16kg coconut oil, 0.1kg black cumin seed oil, 0.04kg evening primrose oil, 0.13kg canola oil, 0.07kg perilla seed oil, 4kg PE masterbatch, 2kg erucic acid amide, 0.1kg white mineral oil are put into a stirring tank, the speed is 800r / min, stirring for 5min, mixing evenly, and obtaining a premix.

[0051] Step 2), the premix is ​​put into a twin screw extruder, and the processing temperature in zones I-XI of the twin screw extruder is controlled to be set to: 165°C, 165°C, 175°C, 185°C, 195°C, 195°C, 195°C, 200°C, 200°C, 200°C, and the screw speed is controlled to make the time of the premix in the twin screw extruder (calculated from entering the feed port to extruding from the extruder head) be 12.5min, and after extruding the tube embryo, it is blow-molded by a blow molding machine to obtain an antibacterial plastic film with a thickness of 0.2mm.

[0052] Example 3 An antibacterial plastic film is made from the following components: Polypropylene resin, coconut oil, black cumin seed oil, evening primrose oil, canola oil, perilla seed oil, PE masterbatch, erucamide, white mineral oil.

[0053] The polypropylene resin was purchased from Sinopec, model K7726.

[0054] Coconut oil was purchased from Hongxing Natural Medicinal Spice Oil Factory in Jishui County, and the preparation process was physical cold pressing.

[0055] Black cumin seed oil was purchased from Yikan Natural Spice Oil Refinery in Jishui County, and the preparation process was physical cold pressing.

[0056] Evening primrose oil was purchased from Yikang Natural Spice Oil Refinery in Jishui County, and the preparation process was physical cold pressing.

[0057] Rapeseed oil was purchased from Hongxing Natural Medicinal Spice Oil Factory in Jishui County, and the preparation process was physical cold pressing.

[0058] Perilla seed oil was purchased from Yikan Natural Spice Oil Refinery in Jishui County, and the preparation process was physical cold pressing.

[0059] PE masterbatch was purchased from Dongguan Zhengtao Plastic Co., Ltd., item number: HH9240IKNKJU.

[0060] Erucamide was purchased from Jinan Xiangfeng Weiye Chemical Co., Ltd., CAS No.: 112-84-5.

[0061] White mineral oil was purchased from Shandong Taichang Petrochemical Technology Co., Ltd., 5# white mineral oil.

[0062] The preparation method of the antibacterial plastic film comprises the following steps: Step 1), 100kg polypropylene resin, 0.17kg coconut oil, 0.11kg black cumin seed oil, 0.05kg evening primrose oil, 0.14kg canola oil, 0.08kg perilla seed oil, 4.1kg PE masterbatch, 2.1kg erucic acid amide, and 0.11kg white mineral oil are put into a stirring tank, the speed is 800r / min, stirred for 5min, and mixed evenly to obtain a premix.

[0063] Step 2), the premix is ​​put into a twin screw extruder, and the processing temperature in zones I-XI of the twin screw extruder is controlled to be set to: 165°C, 165°C, 175°C, 185°C, 195°C, 195°C, 195°C, 200°C, 200°C, 200°C, and the screw speed is controlled to make the time of the premix in the twin screw extruder (calculated from entering the feed port to extrusion from the extruder head) be 15min, and after extruding the tube embryo, it is blow-molded by a blow molding machine to obtain an antibacterial plastic film with a thickness of 0.2mm.

[0064] Comparative Example 1 An antibacterial plastic film, compared with Example 2, the only difference is: Replace coconut oil with an equal amount of silver ion antibacterial agent.

[0065] Silver ion antibacterial agent was purchased from Foshan Liyuan Chemical Co., Ltd., item number: HH8190B0FK2J, content: 20000PPM.

[0066] Comparative Example 2 An antibacterial plastic film, compared with Example 2, the only difference is: Replace black cumin seed oil with an equal amount of silver ion antibacterial agent.

[0067] Silver ion antibacterial agent was purchased from Foshan Liyuan Chemical Co., Ltd., item number: HH8190B0FK2J, content: 20000PPM.

[0068] Comparative Example 3 An antibacterial plastic film, compared with Example 2, the only difference is: Replace evening primrose oil with an equal amount of silver ion antibacterial agent.

[0069] Silver ion antibacterial agent was purchased from Foshan Liyuan Chemical Co., Ltd., item number: HH8190B0FK2J, content: 20000PPM.

[0070] Comparative Example 4 An antibacterial plastic film, compared with Example 2, the only difference is: An equal amount of silver ion antibacterial agent was used to replace canola oil.

[0071] Silver ion antibacterial agent was purchased from Foshan Liyuan Chemical Co., Ltd., item number: HH8190B0FK2J, content: 20000PPM.

[0072] Comparative Example 5 An antibacterial plastic film, compared with Example 2, the only difference is: An equal amount of silver ion antibacterial agent was used to replace perilla seed oil.

[0073] Silver ion antibacterial agent was purchased from Foshan Liyuan Chemical Co., Ltd., item number: HH8190B0FK2J, content: 20000PPM.

[0074] Comparative Example 6 An antibacterial plastic film, compared with Example 2, the only difference is: Replace coconut oil with an equal amount of silver ion antibacterial agent.

[0075] Replace black cumin seed oil with an equal amount of silver ion antibacterial agent.

[0076] Replace evening primrose oil with an equal amount of silver ion antibacterial agent.

[0077] An equal amount of silver ion antibacterial agent was used to replace canola oil.

[0078] An equal amount of silver ion antibacterial agent was used to replace perilla seed oil.

[0079] Silver ion antibacterial agent was purchased from Foshan Liyuan Chemical Co., Ltd., item number: HH8190B0FK2J, content: 20000PPM.

[0080] Comparative Example 7 An antibacterial plastic film, compared with Example 2, the only difference is: Replace the coconut oil with wheat germ oil in equal amounts.

[0081] Wheat germ oil was purchased from Hongxing Natural Medicinal Spice Oil Factory in Jishui County, and the preparation process was physical cold pressing.

[0082] Comparative Example 8 An antibacterial plastic film, compared with Example 2, the only difference is: Replace black cumin seed oil with an equal amount of safflower seed oil.

[0083] Safflower seed oil was purchased from Ji'an Zhongda Natural Plant Spice Co., Ltd., and the preparation process was physical cold pressing.

[0084] Comparative Example 9 An antibacterial plastic film, compared with Example 2, the only difference is: Replace evening primrose oil with an equal amount of hemp seed oil.

[0085] Hemp seed oil was purchased from the Hongxing Natural Medicinal Spice Oil Factory in Jishui County, and the preparation process was physical cold pressing.

[0086] Comparative Example 10 An antibacterial plastic film, compared with Example 2, the only difference is: Replace canola oil with an equal amount of flaxseed oil.

[0087] Flaxseed oil was purchased from Hongxing Natural Medicinal Spice Oil Factory in Jishui County, and the preparation process was physical cold pressing.

[0088] Comparative Example 11 An antibacterial plastic film, compared with Example 2, the only difference is: Replace perilla seed oil with an equal amount of corn oil.

[0089] Corn oil was purchased from Yikan Natural Spice Oil Refinery in Jishui County, and the preparation process was physical cold pressing.

[0090] Comparative Example 12 An antibacterial plastic film, compared with Example 2, the only difference is: Replace the coconut oil with wheat germ oil in equal amounts.

[0091] Replace black cumin seed oil with an equal amount of safflower seed oil.

[0092] Replace evening primrose oil with an equal amount of hemp seed oil.

[0093] Replace canola oil with an equal amount of flaxseed oil.

[0094] Replace perilla seed oil with an equal amount of corn oil.

[0095] Wheat germ oil was purchased from Hongxing Natural Medicinal Spice Oil Factory in Jishui County, and the preparation process was physical cold pressing.

[0096] Safflower seed oil was purchased from Ji'an Zhongda Natural Plant Spice Co., Ltd., and the preparation process was physical cold pressing.

[0097] Hemp seed oil was purchased from the Hongxing Natural Medicinal Spice Oil Factory in Jishui County, and the preparation process was physical cold pressing.

[0098] Flaxseed oil was purchased from Hongxing Natural Medicinal Spice Oil Factory in Jishui County, and the preparation process was physical cold pressing.

[0099] Corn oil was purchased from Yikan Natural Spice Oil Refinery in Jishui County, and the preparation process was physical cold pressing.

[0100] Experiment 1 According to GB / T1040.3-2006 "Determination of tensile properties of plastics Part 3: Test conditions for films and sheets", the tensile strength (MPa) of the test samples made of the antibacterial plastic films of each embodiment and comparative example was tested.

[0101] Experiment 2 According to GB / T 31402-2015 "Test method for antibacterial performance of plastic surfaces", the antibacterial performance values ​​of the test samples made of the antibacterial plastic films prepared in each embodiment and comparative example were tested.

[0102] The bacterial strain selected was Staphylococcus aureus, with the deposit number: ATCC 6538P.

[0103] The specific test data of Experiments 1 and 2 are shown in Table 1.

[0104] Table 1 According to the data comparison of each embodiment and the comparative example in Table 1, the antibacterial performance of each embodiment is similar to that of comparative examples 1-6. It can be seen that by adding coconut oil, black cumin seed oil, evening primrose oil, canola oil, and perilla seed oil in each embodiment, the plastic film can have better antibacterial performance, and the antibacterial performance is similar to that of the silver ion antibacterial agent. At the same time, the strength of the plastic film is significantly improved, and the tensile strength of each embodiment is significantly higher than that of comparative examples 1-6. It can be seen that the addition of coconut oil, black cumin seed oil, evening primrose oil, canola oil, and perilla seed oil can improve the antibacterial performance of the plastic film while improving the strength of the plastic film.

[0105] The antibacterial performance and tensile strength of each embodiment are significantly higher than those of comparative examples 7-12. It can be seen that only when coconut oil, black cumin seed oil, evening primrose oil, canola oil, and perilla seed oil are compounded, can the antibacterial effect be significantly improved. When other vegetable oils are used, although the plastic film can also have an antibacterial effect, there is a large gap from the antibacterial effect of the silver ion antibacterial agent. Moreover, although the use of other vegetable oils can reduce the strength decrease caused by the addition of silver ion antibacterial agents, it cannot achieve the effect of improving the strength of the plastic film when coconut oil, black cumin seed oil, evening primrose oil, canola oil, and perilla seed oil are compounded, resulting in the tensile strength of comparative examples 7-12 being higher than that of comparative examples 1-6 but significantly lower than that of each embodiment.

[0106] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. An antibacterial plastic film, characterized in that: Made from the following components in parts by weight: 100 parts of polypropylene resin; Antibacterial agent 0.45-0.55 parts; Additives 5.89-6.31 parts; The antibacterial agent is a compound of coconut oil, black cumin seed oil, evening primrose oil, canola oil and perilla seed oil.

2. The antibacterial plastic film according to claim 1, characterized in that: The mass ratio of the coconut oil, black cumin seed oil, evening primrose oil, canola oil and perilla seed oil is 0.15-0.17: 0.09-0.11: 0.03-0.05: 0.12-0.14: 0.06-0.

08.

3. The antibacterial plastic film according to claim 2, characterized in that: The auxiliary agent is a compound of a color masterbatch, an anti-blocking agent and a gloss regulator.

4. The antibacterial plastic film according to claim 3, characterized in that: The mass ratio of the masterbatch, the anti-blocking agent and the gloss regulator is 3.9-4.1:1.9-2.1:0.09-0.

11.

5. The antibacterial plastic film according to claim 4, characterized in that: The masterbatch is a PE masterbatch.

6. The antibacterial plastic film according to claim 4, characterized in that: The opening agent is erucamide.

7. The antibacterial plastic film according to claim 4, characterized in that: The gloss regulator is white mineral oil.

8. A method for preparing the antibacterial plastic film according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1), the polypropylene resin, the antibacterial agent and the auxiliary agent are uniformly mixed to obtain a premix; Step 2), the premix is ​​extruded and blow-molded to obtain an antibacterial plastic film.

9. The method for preparing an antibacterial plastic film according to claim 7, characterized in that: In the step 2), the premix is ​​in the extruder for 10-15 minutes.

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