CN115160617A - Process for producing thin film - Google Patents
Process for producing thin film Download PDFInfo
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- CN115160617A CN115160617A CN202211024429.5A CN202211024429A CN115160617A CN 115160617 A CN115160617 A CN 115160617A CN 202211024429 A CN202211024429 A CN 202211024429A CN 115160617 A CN115160617 A CN 115160617A
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- parts
- film
- flame retardant
- temperature
- product
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 title claims abstract description 21
- 239000010409 thin film Substances 0.000 title description 7
- 238000005266 casting Methods 0.000 claims abstract description 25
- 239000011248 coating agent Substances 0.000 claims abstract description 16
- 238000000576 coating method Methods 0.000 claims abstract description 16
- 239000006185 dispersion Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 15
- 238000011282 treatment Methods 0.000 claims abstract description 14
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000001125 extrusion Methods 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 38
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 32
- 230000003712 anti-aging effect Effects 0.000 claims description 32
- 239000003795 chemical substances by application Substances 0.000 claims description 32
- 239000003063 flame retardant Substances 0.000 claims description 32
- 239000000047 product Substances 0.000 claims description 32
- 238000001035 drying Methods 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 27
- 229920002545 silicone oil Polymers 0.000 claims description 25
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 23
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 20
- 238000004806 packaging method and process Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- 239000004014 plasticizer Substances 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 17
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 15
- 239000012796 inorganic flame retardant Substances 0.000 claims description 15
- 239000002131 composite material Substances 0.000 claims description 13
- 239000005543 nano-size silicon particle Substances 0.000 claims description 13
- 235000012239 silicon dioxide Nutrition 0.000 claims description 13
- HFZLSTDPRQSZCQ-UHFFFAOYSA-N 1-pyrrolidin-3-ylpyrrolidine Chemical compound C1CCCN1C1CNCC1 HFZLSTDPRQSZCQ-UHFFFAOYSA-N 0.000 claims description 12
- 244000043261 Hevea brasiliensis Species 0.000 claims description 12
- 240000007673 Origanum vulgare Species 0.000 claims description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 12
- HDSBZMRLPLPFLQ-UHFFFAOYSA-N Propylene glycol alginate Chemical compound OC1C(O)C(OC)OC(C(O)=O)C1OC1C(O)C(O)C(C)C(C(=O)OCC(C)O)O1 HDSBZMRLPLPFLQ-UHFFFAOYSA-N 0.000 claims description 12
- 239000003963 antioxidant agent Substances 0.000 claims description 12
- 230000003078 antioxidant effect Effects 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000003822 epoxy resin Substances 0.000 claims description 12
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 12
- 229920000609 methyl cellulose Polymers 0.000 claims description 12
- 239000001923 methylcellulose Substances 0.000 claims description 12
- 235000010981 methylcellulose Nutrition 0.000 claims description 12
- 229920003052 natural elastomer Polymers 0.000 claims description 12
- 229920001194 natural rubber Polymers 0.000 claims description 12
- 239000004209 oxidized polyethylene wax Substances 0.000 claims description 12
- 235000013873 oxidized polyethylene wax Nutrition 0.000 claims description 12
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 12
- 229920000647 polyepoxide Polymers 0.000 claims description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 12
- 239000000770 propane-1,2-diol alginate Substances 0.000 claims description 12
- 235000010409 propane-1,2-diol alginate Nutrition 0.000 claims description 12
- 235000011203 Origanum Nutrition 0.000 claims description 11
- 241001529744 Origanum Species 0.000 claims description 11
- 239000000377 silicon dioxide Substances 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 235000010677 Origanum vulgare Nutrition 0.000 claims description 10
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 239000006228 supernatant Substances 0.000 claims description 10
- 239000004408 titanium dioxide Substances 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- LNAZSHAWQACDHT-XIYTZBAFSA-N (2r,3r,4s,5r,6s)-4,5-dimethoxy-2-(methoxymethyl)-3-[(2s,3r,4s,5r,6r)-3,4,5-trimethoxy-6-(methoxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6r)-4,5,6-trimethoxy-2-(methoxymethyl)oxan-3-yl]oxyoxane Chemical compound CO[C@@H]1[C@@H](OC)[C@H](OC)[C@@H](COC)O[C@H]1O[C@H]1[C@H](OC)[C@@H](OC)[C@H](O[C@H]2[C@@H]([C@@H](OC)[C@H](OC)O[C@@H]2COC)OC)O[C@@H]1COC LNAZSHAWQACDHT-XIYTZBAFSA-N 0.000 claims description 7
- 229920002635 polyurethane Polymers 0.000 claims description 7
- 239000004814 polyurethane Substances 0.000 claims description 7
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 claims description 5
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229920000877 Melamine resin Polymers 0.000 claims description 5
- 229920000388 Polyphosphate Polymers 0.000 claims description 5
- 150000001335 aliphatic alkanes Chemical group 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 5
- 239000000347 magnesium hydroxide Substances 0.000 claims description 5
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 5
- ZQKXQUJXLSSJCH-UHFFFAOYSA-N melamine cyanurate Chemical compound NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 239000003921 oil Substances 0.000 claims description 5
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 5
- ACVYVLVWPXVTIT-UHFFFAOYSA-M phosphinate Chemical compound [O-][PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-M 0.000 claims description 5
- 239000001205 polyphosphate Substances 0.000 claims description 5
- 235000011176 polyphosphates Nutrition 0.000 claims description 5
- 230000035484 reaction time Effects 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 claims description 5
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 5
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 235000013628 Lantana involucrata Nutrition 0.000 claims description 2
- 235000006677 Monarda citriodora ssp. austromontana Nutrition 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000010408 film Substances 0.000 description 46
- 239000012528 membrane Substances 0.000 description 11
- 239000010410 layer Substances 0.000 description 10
- 235000013305 food Nutrition 0.000 description 5
- 235000020731 origanum vulgare extract Nutrition 0.000 description 5
- 239000002985 plastic film Substances 0.000 description 5
- 229920006255 plastic film Polymers 0.000 description 5
- 229920006267 polyester film Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000003385 bacteriostatic effect Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012785 packaging film Substances 0.000 description 2
- 229920006280 packaging film Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013410 fast food Nutrition 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 238000009459 flexible packaging Methods 0.000 description 1
- 238000009920 food preservation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- C08J5/18—Manufacture of films or sheets
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- Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Engineering & Computer Science (AREA)
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- Agricultural Chemicals And Associated Chemicals (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application provides a process for producing a film, and belongs to the technical field of film production. By optimizing a formula and improving the traditional production process and parameters, raw materials are prepared according to the formula proportion, a product A and a product B are simultaneously put into a high-speed mixer, a double-screw extruder is used for high-temperature extrusion molding, the obtained particles are sent into a casting machine for casting and film forming, then antibacterial coating is carried out, a mixed dispersion liquid C is coated on the obtained film, microwave treatment is carried out, and finally the product is dried, rolled and packaged.
Description
Technical Field
The application relates to the field of film production, in particular to a process for producing a film.
Background
At present, plastic films are films made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, and are used for packaging and as film coating layers, the plastic film packaging and the products packaged by the plastic films account for more and more in the market, particularly, the composite plastic flexible packaging is frequently and widely applied to the fields of food, medical treatment, chemical industry and the like, wherein the food packaging accounts for the largest proportion, such as beverage packaging, quick-freezing packaging, fast food packaging and the like, and can bring great convenience to the life of people.
For example, application number is CN202120607067.7 discloses a PET leaves type membrane and crosses from type membrane, through having seted up a plurality of tearing holes, the protection limit membrane of connecting from type membrane is connected with the tear ring, tear the ring and be connected with anti-skidding sand grip, can make this PET leave type membrane and tear the function, personnel need not to tailor and can use from type membrane using PET, time saving and labor saving more, avoid PET to cut out the process production loss from type membrane simultaneously and guarantee its avris neat, guarantee personnel's use, personnel's property has been protected. In addition, be connected with the thermal-insulated layer through the PET layer, fibrous layer and enhancement layer that the insulating layer is connected, the wearing layer and the waterproof layer that the enhancement layer is connected are connected, the waterproof layer surface is scribbled and is equipped with the silicone oil coating, can make this PET have better thermal-insulated water-proof effects from the type membrane, guarantee simultaneously that PET has higher intensity from the type membrane, guarantee that PET is more durable from the type membrane, personnel can retrieve reuse from the type membrane to PET, have practiced thrift personnel's property.
The inventor finds that the traditional film production process is relatively fixed, the produced film has relatively low tensile strength and relatively poor antibacterial performance, and how to invent a film production process to improve the problems becomes a problem to be solved by the technical personnel in the field.
Disclosure of Invention
In order to remedy the above deficiencies, the present application provides a process for producing a thin film, which aims to improve the problems of the background art described above.
The embodiment of the application provides a process for producing a film, which specifically comprises the following steps:
step S1, preparing materials, namely preparing raw materials according to a formula proportion, wherein the raw materials of the film comprise the following components in parts by weight: 60-80 parts of natural rubber, 60-70 parts of polyvinyl alcohol, 26-30 parts of ethylene-vinyl acetate copolymer, 12-18 parts of propylene glycol alginate, 20-26 parts of nano-silica, 5-6 parts of methyl cellulose, 18-20 parts of ethyl silicone oil, 8-12 parts of titanium dioxide, 26-32 parts of epoxy resin, 2-4 parts of active calcium carbonate, 14-18 parts of oxidized polyethylene wax, 1-2 parts of composite antioxidant, 3-6 parts of modified nano-silica, 12-17 parts of ethyl silicone oil, 34-38 parts of butyl propionate, 2-3 parts of anti-aging agent, 1-1.2 parts of flame retardant and 2-6 parts of plasticizer;
step S2, adding natural rubber, polyvinyl alcohol, ethylene-vinyl acetate copolymer, propylene glycol alginate, nano silicon dioxide, methyl cellulose and ethyl silicone oil into a jacket heating reaction kettle according to the formula amount in the step S1, gradually heating up to 100-130 ℃ within 1 hour, continuously stirring at the temperature with the stirring speed of 100r/min and the reaction time of 2 hours, then stopping heating, naturally cooling, keeping for 2-3 hours, finally moving into the reaction kettle again, adding titanium dioxide, and stirring for 1 hour to obtain a product A;
step S3, according to the formula amount in the step S1, putting the epoxy resin, the activated calcium carbonate, the oxidized polyethylene wax, the composite antioxidant, the modified nano-silica, the ethyl silicone oil, the butyl propionate, the anti-aging agent, the flame retardant and the plasticizer into a high-speed mixer, wherein the rotating speed of the high-speed mixer is 150r/min, and uniformly mixing to obtain a product B;
s4, putting the origanum vulgaris extract into a mixer, adding the waterborne polyurethane, and uniformly stirring to obtain a mixed dispersion liquid C;
s5, extruding and molding at high temperature by using a double-screw extruder, simultaneously putting the product A and the product B into a high-speed mixer, heating to 80-90 ℃, stirring for 1-2 hours, and performing high-temperature extrusion on the prepared mixture by using the double-screw extruder, wherein the rotating speed of the extruder is controlled to be 200-250r/min, and the temperature is controlled to be 160-200 ℃;
s6, casting the particles into a film by a casting machine, feeding the obtained particles into the casting machine for casting the film, wherein the film-making temperature is controlled to be 220-260 ℃, and the temperature of a cooling roller is controlled to be 20-25 ℃;
s7, antibacterial coating, namely coating the mixed dispersion liquid C on the obtained film, and performing microwave treatment for 5min at the temperature of 60-70 ℃;
and S8, drying, rolling and packaging the product, drying the film, finally rolling the film with the rolling tension of 5-10kg, and then packaging the film.
2. The process for producing a film according to claim 1, wherein the oregano extract in step S4 is obtained by the steps of:
a: cleaning origanum vulgare, drying and crushing;
b: dispersing the crushed origanum vulgare in absolute ethyl alcohol, performing ultrasonic dispersion, and then soaking for 24-36h;
c: performing microwave treatment for 4-5min, centrifuging, and collecting supernatant;
d: washing the solid with anhydrous ethanol for three times, collecting washing solution, mixing with the supernatant, and distilling and concentrating under normal pressure to obtain herba Origani extract.
In a specific embodiment, in step S8, the dried film needs to be sterilized, and then the sterilized film is rolled and packaged.
In a specific embodiment, in step S8, the drying temperature is 120 degrees celsius, and the drying time is 5 to 8 hours.
In a specific embodiment, the anti-aging agent is a mixture of quinoline anti-aging agents and/or p-phenylenediamine anti-aging agents and mercaptobenzimidazole anti-aging agents.
In a specific embodiment, the flame retardant is a mixture of an inorganic flame retardant and an organic flame retardant, the organic flame retardant is at least one of melamine cyanurate, melamine polyphosphate, organic hypophosphite and pentaerythritol, the inorganic flame retardant is at least one of zinc borate, magnesium hydroxide and expandable graphite, and the mass ratio of the inorganic flame retardant to the organic flame retardant is (2-10): 1.
in a particular embodiment, the plasticizer is an alkane oil and triethylene glycol diisocaprylate in a weight ratio (1-5): 1.
Has the advantages that: the application provides a process for producing a film, which improves the traditional production process and parameters, and comprises the steps of firstly adding natural rubber, polyvinyl alcohol, an ethylene-vinyl acetate copolymer, propylene glycol alginate, nano silicon dioxide, methyl cellulose and ethyl silicone oil into a jacket heating reaction kettle to obtain a product A, then adding epoxy resin, active calcium carbonate, oxidized polyethylene wax, a composite antioxidant, modified nano silicon dioxide, ethyl silicone oil, butyl propionate, an anti-aging agent, a flame retardant and a plasticizer into a high-speed mixer to obtain a product B, then adding an origanum vulgaris extract into the high-speed mixer, uniformly stirring the mixture by adding a waterborne polyurethane mixer to obtain a mixed dispersion liquid C, extruding the mixture at a high temperature by using a double-screw extruder to form a film by casting, then carrying out antibacterial coating, coating the mixed dispersion liquid C on the obtained film, carrying out microwave treatment, finally drying, rolling and packaging the product, wherein the tensile strength, the elongation at break rate and the shore hardness A of the plastic film are 8.8.2% and 92%, and the polyester film is dyed by using the origanum vulgaris extract, so that the natural green body does not harm to the health of the body. Meanwhile, the origanum vulgare extract contains substances with antibacterial effect, so that the origanum vulgare extract can play a good antibacterial and bacteriostatic role, is favorable for storing food when used as a food packaging film, and is suitable for popularization and use.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a flow chart of a process for producing a thin film according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.
Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Example one
Referring to fig. 1, the present application provides a process for producing a thin film, which includes the following steps:
step S1, preparing materials, namely preparing raw materials according to a formula proportion, wherein the raw materials of the film comprise the following components in parts by weight: 60 parts of natural rubber, 60 parts of polyvinyl alcohol, 26 parts of ethylene-vinyl acetate copolymer, 12 parts of propylene glycol alginate, 20 parts of nano-silica, 5 parts of methyl cellulose, 18 parts of ethyl silicone oil, 8 parts of titanium dioxide, 26 parts of epoxy resin, 2 parts of activated calcium carbonate, 14 parts of oxidized polyethylene wax, 1 part of composite antioxidant, 3 parts of modified nano-silica, 12 parts of ethyl silicone oil, 34 parts of butyl propionate, 2 parts of anti-aging agent, 1 part of flame retardant and 2 parts of plasticizer;
step S2, adding natural rubber, polyvinyl alcohol, ethylene-vinyl acetate copolymer, propylene glycol alginate, nano silicon dioxide, methyl cellulose and ethyl silicone oil into a jacket heating reaction kettle according to the formula amount in the step S1, gradually heating up to 100-130 ℃ within 1 hour, continuously stirring at the temperature with the stirring speed of 100r/min and the reaction time of 2 hours, then stopping heating, naturally cooling, keeping for 2-3 hours, finally moving into the reaction kettle again, adding titanium dioxide, and stirring for 1 hour to obtain a product A;
step S3, according to the formula amount in the step S1, putting the epoxy resin, the activated calcium carbonate, the oxidized polyethylene wax, the composite antioxidant, the modified nano-silica, the ethyl silicone oil, the butyl propionate, the anti-aging agent, the flame retardant and the plasticizer into a high-speed mixer, wherein the rotating speed of the high-speed mixer is 150r/min, and uniformly mixing to obtain a product B;
step S4, putting the origanum vulgaris extract into a mixer, adding the waterborne polyurethane, and uniformly stirring to prepare a mixed dispersion liquid C;
s5, extruding and molding at high temperature by using a double-screw extruder, simultaneously putting the product A and the product B into a high-speed mixer, heating to 80-90 ℃, stirring for 1-2 hours, and performing high-temperature extrusion on the prepared mixture by using the double-screw extruder, wherein the rotating speed of the extruder is controlled to be 200-250r/min, and the temperature is controlled to be 160-200 ℃;
s6, casting the particles into a film by a casting machine, feeding the obtained particles into the casting machine for casting the particles into the film, controlling the film-making temperature to be 220-260 ℃, and controlling the temperature of a cooling roller to be 20-25 ℃;
s7, antibacterial coating, namely coating the obtained film with the mixed dispersion liquid C, and performing microwave treatment for 5min at the temperature of 60-70 ℃;
and S8, drying, rolling and packaging the product, drying the film, finally rolling, and packaging, wherein the rolling tension is 5-10 kg.
In step S8, the dried film needs to be sterilized, and then the sterilized film is wound and packaged, wherein in step S8, the drying temperature is 120 ℃, and the drying time is 5 to 8 hours.
The origanum vulgare extract in the step S4 is prepared by the following steps:
a: cleaning origanum vulgare, drying and crushing;
b: dispersing the crushed origanum vulgare in absolute ethyl alcohol, performing ultrasonic dispersion, and then soaking for 24-36h;
c: performing microwave treatment for 4-5min, centrifuging, and collecting supernatant;
d: washing the solid with anhydrous ethanol for three times, collecting the washing solution, mixing with the supernatant, and distilling and concentrating under normal pressure to obtain herba Origani extract.
The anti-aging agent is a mixture of quinoline anti-aging agent and/or p-phenylenediamine anti-aging agent and mercaptobenzimidazole anti-aging agent.
The flame retardant is a mixture of an inorganic flame retardant and an organic flame retardant, the organic flame retardant is at least one of melamine cyanurate, melamine polyphosphate, organic hypophosphite and pentaerythritol, the inorganic flame retardant is at least one of zinc borate, magnesium hydroxide and expandable graphite, and the mass ratio of the inorganic flame retardant to the organic flame retardant is (2-10): 1.
the plasticizer is prepared from alkane oil and triethylene glycol diisocaprylate in a weight ratio of (1-5): 1.
Example two
Referring to fig. 1, the present application provides a process for producing a thin film, which includes the following steps:
step S1, preparing materials, namely preparing raw materials according to a formula proportion, wherein the raw materials of the film comprise the following components in parts by weight: 70 parts of natural rubber, 65 parts of polyvinyl alcohol, 28 parts of ethylene-vinyl acetate copolymer, 15 parts of propylene glycol alginate, 24 parts of nano silicon dioxide, 5.5 parts of methyl cellulose, 19 parts of ethyl silicone oil, 10 parts of titanium dioxide, 28 parts of epoxy resin, 3 parts of activated calcium carbonate, 16 parts of oxidized polyethylene wax, 1.5 parts of composite antioxidant, 5 parts of modified nano silicon dioxide, 15 parts of ethyl silicone oil, 36 parts of butyl propionate, 2.5 parts of anti-aging agent, 1.1 parts of flame retardant and 4 parts of plasticizer;
step S2, adding natural rubber, polyvinyl alcohol, ethylene-vinyl acetate copolymer, propylene glycol alginate, nano silicon dioxide, methyl cellulose and ethyl silicone oil into a jacket heating reaction kettle according to the formula amount in the step S1, gradually heating up, heating to 100-130 ℃ within 1 hour, continuously stirring at the temperature with the stirring speed of 100r/min and the reaction time of 2 hours, stopping heating, naturally cooling, keeping for 2-3 hours, finally moving into the reaction kettle again, adding titanium dioxide, and stirring for 1 hour to obtain a product A;
s3, according to the formula amount in the step S1, putting epoxy resin, activated calcium carbonate, oxidized polyethylene wax, a composite antioxidant, modified nano-silica, ethyl silicone oil, butyl propionate, an anti-aging agent, a flame retardant and a plasticizer into a high-speed mixer, wherein the rotating speed of the high-speed mixer is 150r/min, and uniformly mixing to obtain a product B;
step S4, putting the origanum vulgaris extract into a mixer, adding the waterborne polyurethane, and uniformly stirring to prepare a mixed dispersion liquid C;
s5, extruding and molding at high temperature by using a double-screw extruder, simultaneously putting the product A and the product B into a high-speed mixer, heating to 80-90 ℃, stirring for 1-2 hours, and performing high-temperature extrusion on the prepared mixture by using the double-screw extruder, wherein the rotating speed of the extruder is controlled to be 200-250r/min, and the temperature is controlled to be 160-200 ℃;
s6, casting the particles into a film by a casting machine, feeding the obtained particles into the casting machine for casting the film, wherein the film-making temperature is controlled to be 220-260 ℃, and the temperature of a cooling roller is controlled to be 20-25 ℃;
s7, antibacterial coating, namely coating the mixed dispersion liquid C on the obtained film, and performing microwave treatment for 5min at the temperature of 60-70 ℃;
and S8, drying, rolling and packaging the product, drying the film, finally rolling, and packaging, wherein the rolling tension is 5-10 kg.
In step S8, the dried film needs to be sterilized, and then the sterilized film is wound and packaged, wherein in step S8, the drying temperature is 120 ℃, and the drying time is 5 to 8 hours.
The origanum vulgaris extract in the step S4 is prepared by the following steps:
a: cleaning origanum vulgare, drying and crushing;
b: dispersing the crushed origanum vulgare in absolute ethyl alcohol, performing ultrasonic dispersion, and then soaking for 24-36h;
c: performing microwave treatment for 4-5min, centrifuging, and collecting supernatant;
d: washing the solid with anhydrous ethanol for three times, collecting washing solution, mixing with the supernatant, and distilling and concentrating under normal pressure to obtain herba Origani extract.
The anti-aging agent is a mixture of quinoline anti-aging agent and/or p-phenylenediamine anti-aging agent and mercaptobenzimidazole anti-aging agent.
The flame retardant is a mixture of an inorganic flame retardant and an organic flame retardant, the organic flame retardant is at least one of melamine cyanurate, melamine polyphosphate, organic hypophosphite and pentaerythritol, the inorganic flame retardant is at least one of zinc borate, magnesium hydroxide and expandable graphite, and the mass ratio of the inorganic flame retardant to the organic flame retardant is (2-10): 1.
the plasticizer is prepared from alkane oil and triethylene glycol diisocaprylate in a weight ratio of (1-5): 1.
EXAMPLE III
Referring to fig. 1, the present application provides a process for producing a thin film, which specifically includes the following steps:
step S1, preparing materials, namely preparing the raw materials according to a formula proportion, wherein the raw materials of the film comprise the following components in parts by weight: 80 parts of natural rubber, 70 parts of polyvinyl alcohol, 30 parts of ethylene-vinyl acetate copolymer, 18 parts of propylene glycol alginate, 26 parts of nano silicon dioxide, 6 parts of methyl cellulose, 20 parts of ethyl silicone oil, 12 parts of titanium dioxide, 32 parts of epoxy resin, 4 parts of activated calcium carbonate, 18 parts of oxidized polyethylene wax, 2 parts of composite antioxidant, 6 parts of modified nano silicon dioxide, 17 parts of ethyl silicone oil, 38 parts of butyl propionate, 1.2 parts of anti-aging agent, 1.2 parts of flame retardant and 6 parts of plasticizer;
step S2, adding natural rubber, polyvinyl alcohol, ethylene-vinyl acetate copolymer, propylene glycol alginate, nano silicon dioxide, methyl cellulose and ethyl silicone oil into a jacket heating reaction kettle according to the formula amount in the step S1, gradually heating up to 100-130 ℃ within 1 hour, continuously stirring at the temperature with the stirring speed of 100r/min and the reaction time of 2 hours, then stopping heating, naturally cooling, keeping for 2-3 hours, finally moving into the reaction kettle again, adding titanium dioxide, and stirring for 1 hour to obtain a product A;
step S3, according to the formula amount in the step S1, putting the epoxy resin, the activated calcium carbonate, the oxidized polyethylene wax, the composite antioxidant, the modified nano-silica, the ethyl silicone oil, the butyl propionate, the anti-aging agent, the flame retardant and the plasticizer into a high-speed mixer, wherein the rotating speed of the high-speed mixer is 150r/min, and uniformly mixing to obtain a product B;
s4, putting the origanum vulgaris extract into a mixer, adding the waterborne polyurethane, and uniformly stirring to obtain a mixed dispersion liquid C;
s5, extruding and molding at high temperature by using a double-screw extruder, simultaneously putting the product A and the product B into a high-speed mixer, heating to 80-90 ℃, stirring for 1-2 hours, and performing high-temperature extrusion on the prepared mixture by using the double-screw extruder, wherein the rotating speed of the extruder is controlled to be 200-250r/min, and the temperature is controlled to be 160-200 ℃;
s6, casting the particles into a film by a casting machine, feeding the obtained particles into the casting machine for casting the particles into the film, controlling the film-making temperature to be 220-260 ℃, and controlling the temperature of a cooling roller to be 20-25 ℃;
s7, antibacterial coating, namely coating the mixed dispersion liquid C on the obtained film, and performing microwave treatment for 5min at the temperature of 60-70 ℃;
and S8, drying, rolling and packaging the product, drying the film, finally rolling the film with the rolling tension of 5-10kg, and then packaging the film.
In step S8, the dried film needs to be sterilized, and then the sterilized film is wound and packaged, wherein in step S8, the drying temperature is 120 ℃, and the drying time is 5 to 8 hours.
The origanum vulgaris extract in the step S4 is prepared by the following steps:
a: cleaning origanum vulgare, drying and crushing;
b: dispersing the crushed origanum vulgare in absolute ethyl alcohol, performing ultrasonic dispersion, and then soaking for 24-36h;
c: performing microwave treatment for 4-5min, centrifuging, and collecting supernatant;
d: washing the solid with anhydrous ethanol for three times, collecting washing solution, mixing with the supernatant, and distilling and concentrating under normal pressure to obtain herba Origani extract.
The anti-aging agent is a mixture of quinoline anti-aging agent and/or p-phenylenediamine anti-aging agent and mercaptobenzimidazole anti-aging agent.
The flame retardant is a mixture of an inorganic flame retardant and an organic flame retardant, the organic flame retardant is at least one of melamine cyanurate, melamine polyphosphate, organic hypophosphite and pentaerythritol, the inorganic flame retardant is at least one of zinc borate, magnesium hydroxide and expandable graphite, and the mass ratio of the inorganic flame retardant to the organic flame retardant is (2-10): 1.
the plasticizer is prepared from alkane oil and triethylene glycol diisocaprylate in a weight ratio of (1-5): 1.
The working principle of the process for producing the film is as follows: preparing raw materials, preparing raw materials according to a formula proportion, adding natural rubber, polyvinyl alcohol, an ethylene-vinyl acetate copolymer, propylene glycol alginate, nano silicon dioxide, methyl cellulose and ethyl silicone oil into a jacket heating reaction kettle to obtain a product A, adding epoxy resin, activated calcium carbonate, oxidized polyethylene wax, a composite antioxidant, modified nano silicon dioxide, ethyl silicone oil, butyl propionate, an anti-aging agent, a flame retardant and a plasticizer into a high-speed mixer to obtain a product B, adding an origanum vulgaris extract into the mixer, adding waterborne polyurethane, uniformly stirring to obtain a mixed dispersion liquid C, performing high-temperature extrusion molding by using a double-screw extruder, feeding obtained particles into a casting machine for casting to form a film, performing antibacterial coating, coating the mixed dispersion liquid C on the obtained film, performing microwave treatment, drying, rolling and packaging the product, wherein the tensile strength of the plastic film in the embodiment is 8.8/Mpa, the elongation at break is 7.2%, the Shore hardness A is 92, and the origanum vulgaris extract is used for dyeing the natural polyester film, so that the natural polyester film is green and does not harm to the health of a human body. Meanwhile, the origanum vulgare extract contains substances with antibacterial effect, so that the origanum vulgare extract can play a good antibacterial and bacteriostatic role and is beneficial to food preservation when being used as a food packaging film.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. A process for producing a film, comprising the steps of:
step S1, preparing materials, namely preparing raw materials according to a formula proportion, wherein the raw materials of the film comprise the following components in parts by weight: 60-80 parts of natural rubber, 60-70 parts of polyvinyl alcohol, 26-30 parts of ethylene-vinyl acetate copolymer, 12-18 parts of propylene glycol alginate, 20-26 parts of nano-silica, 5-6 parts of methyl cellulose, 18-20 parts of ethyl silicone oil, 8-12 parts of titanium dioxide, 26-32 parts of epoxy resin, 2-4 parts of active calcium carbonate, 14-18 parts of oxidized polyethylene wax, 1-2 parts of composite antioxidant, 3-6 parts of modified nano-silica, 12-17 parts of ethyl silicone oil, 34-38 parts of butyl propionate, 2-3 parts of anti-aging agent, 1-1.2 parts of flame retardant and 2-6 parts of plasticizer;
step S2, adding natural rubber, polyvinyl alcohol, ethylene-vinyl acetate copolymer, propylene glycol alginate, nano silicon dioxide, methyl cellulose and ethyl silicone oil into a jacket heating reaction kettle according to the formula amount in the step S1, gradually heating up to 100-130 ℃ within 1 hour, continuously stirring at the temperature with the stirring speed of 100r/min and the reaction time of 2 hours, then stopping heating, naturally cooling, keeping for 2-3 hours, finally moving into the reaction kettle again, adding titanium dioxide, and stirring for 1 hour to obtain a product A;
step S3, according to the formula amount in the step S1, putting the epoxy resin, the activated calcium carbonate, the oxidized polyethylene wax, the composite antioxidant, the modified nano-silica, the ethyl silicone oil, the butyl propionate, the anti-aging agent, the flame retardant and the plasticizer into a high-speed mixer, wherein the rotating speed of the high-speed mixer is 150r/min, and uniformly mixing to obtain a product B;
s4, putting the origanum vulgaris extract into a mixer, adding the waterborne polyurethane, and uniformly stirring to obtain a mixed dispersion liquid C;
s5, extruding and molding at high temperature by using a double-screw extruder, simultaneously putting the product A and the product B into a high-speed mixer, heating to 80-90 ℃, stirring for 1-2 hours, and performing high-temperature extrusion on the prepared mixture by using the double-screw extruder, wherein the rotating speed of the extruder is controlled to be 200-250r/min, and the temperature is controlled to be 160-200 ℃;
s6, casting the particles into a film by a casting machine, feeding the obtained particles into the casting machine for casting the particles into the film, controlling the film-making temperature to be 220-260 ℃, and controlling the temperature of a cooling roller to be 20-25 ℃;
s7, antibacterial coating, namely coating the mixed dispersion liquid C on the obtained film, and performing microwave treatment for 5min at the temperature of 60-70 ℃;
and S8, drying, rolling and packaging the product, drying the film, finally rolling the film with the rolling tension of 5-10kg, and then packaging the film.
2. The process for producing a film according to claim 1, wherein the oregano extract in step S4 is obtained by the steps of:
a: cleaning origanum vulgare, drying and crushing;
b: dispersing the crushed origanum vulgare in absolute ethyl alcohol, performing ultrasonic dispersion, and then soaking for 24-36h;
c: performing microwave treatment for 4-5min, centrifuging, and collecting supernatant;
d: washing the solid with anhydrous ethanol for three times, collecting washing solution, mixing with the supernatant, and distilling and concentrating under normal pressure to obtain herba Origani extract.
3. The process of claim 1, wherein in step S8, the dried film is sterilized and then wound and packaged.
4. The process for producing a film as claimed in claim 1, wherein in the step S8, the drying temperature is 120 ℃ and the drying time is 5 to 8 hours.
5. A process for producing a film according to claim 1, wherein the anti-aging agent is a mixture of quinoline anti-aging agent and/or p-phenylenediamine anti-aging agent and mercaptobenzimidazole anti-aging agent.
6. The process for producing a film according to claim 1, wherein the flame retardant is a mixture of an inorganic flame retardant and an organic flame retardant, the organic flame retardant is at least one of melamine cyanurate, melamine polyphosphate, organic hypophosphite and pentaerythritol, the inorganic flame retardant is at least one of zinc borate, magnesium hydroxide and expandable graphite, and the mass ratio of the inorganic flame retardant to the organic flame retardant is (2-10): 1.
7. a process for producing films according to claim 1, characterized in that the plasticizer is an alkane oil and triethylene glycol diisocaprylate in the weight ratio (1-5): 1.
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Application publication date: 20221011 |