CN113337195B - Processing technology of release oil for plastic, dry-mixing instant bowl cover and dry-mixing instant bowl cover - Google Patents
Processing technology of release oil for plastic, dry-mixing instant bowl cover and dry-mixing instant bowl cover Download PDFInfo
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- CN113337195B CN113337195B CN202110605879.2A CN202110605879A CN113337195B CN 113337195 B CN113337195 B CN 113337195B CN 202110605879 A CN202110605879 A CN 202110605879A CN 113337195 B CN113337195 B CN 113337195B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G19/00—Table service
- A47G19/26—Butter or cheese dishes or covers, with or without cooling or heating devices; Protective covers for food containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/42—Gloss-reducing agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The application relates to the technical field of food plastic packaging, in particular to release oil for plastics, a processing technology of a dry-mixing instant bowl cover and the dry-mixing instant bowl cover, wherein the release oil for plastics is prepared from the following raw materials in percentage by weight: the component A comprises: 7-13% of alcohol-soluble polyurethane resin; and B component: 3-8% of isopropanol; and C, component C: 2-5% of liquid cane wax and 10-15% of ethanol; and (D) component: 3-8% of water; 7-13% of adhesion enhancer; 0.05 to 0.2 percent of stabilizer; and E, component (E): 15-23% of alcohol-soluble polyurethane resin; and F component: 5-10% of ethanol, 3-8% of water, 8-13% of liquid cane wax and 8-15% of isopropanol; the release oil for plastics has good adhesive force and leveling property, and has good release effect after being printed in a bowl cover release area; the dry-mixed instant bowl cover processed by adopting the release oil after printing has good stripping performance in a tearable area, standard hole falling and hole residue, no transfer in the release area and excellent comprehensive performance.
Description
Technical Field
The application relates to the technical field of food plastic packaging, in particular to release oil for plastic, a processing technology of a dry-mixing instant bowl cover and the dry-mixing instant bowl cover.
Background
The dry-mixed instant noodles such as bowl-packed dry mixed noodles, hot dry noodles, sauce mixed noodles and the like are popular with people because of convenient eating and variable taste. In order to improve the sealing performance in the dry mixing instant bowl in the process of soaking in water, sealing bowl covers matched with the dry mixing instant bowl are arranged on the dry mixing instant bowl.
The dry mixing instant bowl cover adopts a multi-layer structure compounded by plastic and aluminum foil mostly, one side of the bowl cover can be torn, a proper amount of hot water is poured into the dry mixing instant bowl after the bowl cover is torn, and the torn part is sealed on the top surface of the bowl by using a fork, so that dry noodles are soaked by the hot water and become soft in the soaking process. Before eating, the tearing part is lifted again, water in the bowl is poured out from the side, and the seasoning is added and stirred uniformly. However, such a bowl cover has the following problems: when water in the bowl is poured out, the noodles can be poured out along with the water, and convenience of the noodles is affected.
In order to solve the above problems, at present, the structure of the lid of the instant bowl with dry mix is improved in the related art, specifically: one side of the bowl cover can be torn open and is used for adding water into the bowl; the other side is provided with a release area, and a bowl cover below the release area is provided with a water filtering hole. When need pouring out the water in the bowl, tear the type district away, originally can glue under the drainage hole in the drainage hole and tear together on the type district to expose the drainage hole, pour out the water in the bowl from the drainage hole. Due to the obstruction of the water filtering holes, the noodles in the bowl can be effectively prevented from being poured out along with water.
Above-mentioned correlation technique has improved the convenience of use of dry mixing fast food bowl lid, but it is not enough even from type oil from the printing of type district to there are too big or undersize from the adhesive force of type oil, the not good enough scheduling problem of levelling nature, all can lead to leaving type effect not good enough, tearing to leave type district back, can appear that partial drainage hole still is in the encapsulated situation, or partial drainage hole lower piece is from the problem that type district drops, influence the convenience of use.
Disclosure of Invention
In order to solve the problem that the release effect of a release area of a dry-mixed instant bowl cover is not good enough, the application provides release oil for plastics, a processing technology of the dry-mixed instant bowl cover and the dry-mixed instant bowl cover.
In a first aspect, the application provides a release oil for plastics, which adopts the following technical scheme:
the release oil for the plastic is prepared from the following raw materials in percentage by weight: the component A comprises: 7-13% of alcohol-soluble polyurethane resin; and B component: 3-8% of isopropanol; and C, component C: 2-5% of liquid cane wax and 10-15% of ethanol; and (D) component: 3-8% of water; 7-13% of adhesion enhancer; 0.05 to 0.2 percent of stabilizer; and E, component (E): 15-23% of alcohol-soluble polyurethane resin; and F component: 5-10% of ethanol, 3-8% of water, 8-13% of liquid cane wax and 8-15% of isopropanol.
By adopting the technical scheme, the adhesion enhancer is added into the alcohol-soluble polyurethane resin system, and the adhesion of the release oil can be effectively improved by matching with each component; the stabilizer mainly stabilizes the adhesion enhancer, the alcohol-soluble polyurethane resin and the liquid cane wax, can improve the adhesion and leveling property of the release oil by matching with other components, and has better release effect after being printed in a bowl cover release area.
Preferably, the method comprises the following steps: the adhesion reinforcing agent is PU-518 polyurethane resin.
Preferably, the method comprises the following steps: the stabilizer is matting powder, and the particle size of the matting powder is not more than 5 microns.
More preferably, the stabilizer is selected from the matting powder OK-5 or the matting powder OK-412.
By adopting the technical scheme, the extinction powder can play a role in dispersing and stabilizing a resin system in the system, can effectively avoid the resin system from precipitating, and improves the leveling property and the adhesive force of the release oil.
Preferably, the method comprises the following steps: the release oil for the plastic is prepared by the following method:
mixing the component A and the component B, and stirring uniformly; adding the component C, and uniformly stirring; adding the component D, and uniformly stirring; adding an adhesion enhancer, and stirring until no precipitate exists; adding a stabilizer, grinding and dispersing, and uniformly stirring; adding the component E, and uniformly stirring; and adding the component F, and uniformly stirring to obtain the release oil for the plastic.
Grinding can weaken the performances of alcohol-soluble polyurethane resin and the like, a small amount of alcohol-soluble polyurethane resin is added before the stabilizer is added to be matched with various auxiliaries for solvent dispersion, and a large amount of alcohol-soluble polyurethane resin is added after the stabilizer is added to ensure various performances of the release oil; in addition, the addition of the adhesion enhancer can influence the dispersion stability of the system, the dispersion stability of the system is effectively improved by adjusting the proportion of the auxiliary agents of the system before and after the addition of the adhesion enhancer, and the adhesion, leveling property and other properties of the release oil are improved by matching with the stabilizer.
Preferably, the method comprises the following steps: adding stabilizer, stirring, grinding to fineness not more than 5 μm, and adding component E.
The great fineness of the release oil can lead to a large friction coefficient, so that the composite strength of the release oil is increased, and the release effect is influenced. The release effect of the release oil reaches the standard by grinding to a proper fineness.
In a second aspect, the application provides a processing technology of a dry-mix instant bowl cover, which adopts the following technical scheme:
a processing technology of a dry-mixing instant bowl cover comprises the following processing steps:
compounding the coated paper/PET layer: compounding the coated paper and the PET film to obtain a No. 1 semi-finished product;
printing a pattern layer and release oil: printing the release oil in any one of the above mentioned release areas on the surface of the No. 1 semi-finished product PET by double-plate overprinting, and drying to obtain No. 2 semi-finished product;
compounding an aluminum foil/PET layer: laminating the aluminum foil and another PET film together with an aqueous adhesive to form a No. 3 semi-finished product;
extrusion compounding: bonding the aluminum foil layer of the No. 3 semi-finished product and the side of the No. 2 semi-finished product printed with release oil together, and then compounding a functional layer and a heat sealing layer on the surface of the No. 3 semi-finished product PET layer to obtain a No. 4 semi-finished product;
and (3) compounding a PET film on the surface of the pattern layer of the No. 4 semi-finished product, and then sequentially carrying out slitting, die pressing and die cutting to obtain the finished product of the dry-mixed instant bowl cover.
By adopting the technical scheme, after the bowl cover is processed by each procedure, the bowl cover which has a multilayer structure, good heat sealing performance and excellent tearing performance in the tearable area is formed.
Preferably, the method comprises the following steps: before printing release oil, a pattern layer is printed on the surface of the coated paper, and after reversal, the release oil is printed in a release area on the surface of No. 1 semi-finished product PET.
By adopting the technical scheme, the coated paper and the PET film are compounded, the pattern is printed on the coated paper layer of the coated paper/PET layer, the release oil is printed on the other side of the coated paper layer, the pattern layer and the release oil layer can be processed in one process, time and labor are saved, and the cost is saved.
Preferably, the method comprises the following steps: before printing with the release oil, the release oil is diluted in the following way: when the printing speed is 130-150m/min, diluting the release oil according to the weight ratio of the diluent to the release oil of 1 (1-1.2); when the printing speed is 100-125m/min, the release oil is diluted according to the weight ratio of the diluent to the release oil of 1 (0.6-0.7).
Through adopting above-mentioned technical scheme, according to the printing speed of a motor vehicle of difference, adjust the dilution ratio from type oil, can print out from type excellent in performance from the type oil reservoir.
Preferably, the method comprises the following steps: the diluent comprises ethanol and isopropanol, and the weight ratio of the ethanol to the isopropanol is (5-7) to (3-5).
In a third aspect, the application provides a dry-mix instant bowl cover processed by the processing technology.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the adhesion enhancer is added into the alcohol-soluble polyurethane resin system and is matched with each component, so that the adhesion of the release oil can be effectively improved, and the adhesion and the leveling property of the release oil are effectively improved by matching the stabilizer and other components;
2. the release oil prepared by the preparation method of the release oil is moderate in adhesive force, good in leveling property, free of transfer after printing and good in release effect;
3. the release oil is applied to the processing of the dry-mix instant bowl cover, the obtained bowl cover tearable area has good stripping performance, the hole falls and the hole residue reach the standard, and the release area has no transfer;
4. patterns are printed on the copper plate paper layer of the copper plate paper/PET layer, and release oil is printed on the other side of the copper plate paper layer, so that the pattern layer and the release oil layer are processed in one procedure, time and labor are saved, and the cost is saved.
Detailed Description
The present application is described in further detail below with reference to specific contents.
In the present application, the raw materials and auxiliaries are commercially available products unless otherwise specified. Wherein, ethanol and isopropanol are industrial solvents, and the mass percent concentration is more than or equal to 99 percent; the model of the liquid cane wax is BLK-G; the water is tap water; the LDPE is selected from LDPE 955 of Korea; the grain diameters of the matting powder OK-412 and the matting powder OK-5 are not more than 5 μm.
Example 1
A release oil for plastics is prepared by the following steps:
adding the component A and the component B into a stirrer according to the mixing amount shown in the table 1, and uniformly stirring and mixing to obtain a mixed solution a for later use; adding liquid cane wax and ethanol into the other stirrer, and uniformly stirring and mixing to obtain a component C;
sequentially adding the component C and the component D into the mixed solution a under the stirring state, and stirring and dispersing for 2min to obtain a mixed material b;
adding an adhesion enhancer into the mixture b, and stirring and dispersing for 2 hours at 1000r/min until no precipitate exists; adding a stabilizer, and grinding once at a grinding speed of 300L/h to obtain a mixture c;
uniformly stirring ethanol, water, liquid cane wax and isopropanol to obtain a component F for later use;
and (3) sequentially adding the component E and the component F into the mixture c under the stirring state, and stirring and dispersing uniformly at 1000r/min to obtain the release oil for the finished plastic.
Example 2
Example 2 differs from example 1 in that: adding an adhesion enhancer into the mixture b, stirring for 5min at 1000r/min, and grinding for three times at a grinding speed of 300L/h until the fineness is 5 μm; adding a stabilizer, stirring and dispersing for 5min, grinding once at a grinding speed of 300L/h to ensure that the fineness of the mixture is not more than 5 mu m, and obtaining a mixture c; the rest is the same as in example 1.
Example 3
Example 3 differs from example 1 in that: adding an adhesion enhancer into the mixture b, stirring and dispersing for 5min at 1000r/min, and grinding for four times at a grinding speed of 300L/h until the fineness reaches 5 mu m; then, the stabilizer was added, and the rest was the same as in example 1.
Example 4
Example 4 differs from example 1 in that: after the addition of the stabilizer, the mixture was ground 3 times at a grinding speed of 300L/h to a fineness of not more than 5 μm, and the rest was the same as in example 1.
Examples 5 to 8
The release oils for plastics of examples 5 to 8 were prepared in the same manner as in example 2, except that the amounts of the raw materials and the additives were different, as shown in table 1.
TABLE 1 blending amounts (unit: g) of respective raw materials and auxiliary agents of release oils for plastics of examples 1 to 8
The release oil for plastics of examples 1-8 is subjected to performance detection by using GB/T13217-:
fineness (unit: μm); the fineness range of the release oil which is matched with the PET surface better is less than or equal to 5 mu m;
viscosity (unit: s): detection conditions are as follows: a # 3 Zen cup at 25 +/-1 ℃; the viscosity range of the release oil which is better matched with the PET surface is 12-14 s;
adhesion (unit:%); the range of the adhesive force of the release oil which is matched with the surface of PET and has better adhesion is 80-90%;
coefficient of friction: the friction coefficient range of the release oil which is better matched with the PET surface is 0.3-0.5;
leveling property: and (3) printing the plastic on a PET plastic sample plate by using release oil, and observing the leveling property of the surface of the paint film.
TABLE 2 results of testing the properties of the release oils for plastics of examples 1 to 8
| Fineness of fineness | Viscosity of the oil | Adhesion force | Coefficient of friction | Leveling property | |
| Example 1 | 7 | 15 | 80 | 0.6 | Uneven thickness and local pinholes |
| Example 2 | 4 | 13 | 90 | 0.4 | Uniform thickness, smooth surface and no pinhole |
| Example 3 | 8 | 16 | 78 | 0.7 | Uneven thickness and more pinholes on the surface |
| Example 4 | 4 | 14 | 80 | 0.4 | Uneven thickness and a few pinholes |
| Example 5 | 4 | 14 | 88 | 0.4 | Uniform thickness and micro pinholes on surface |
| Example 6 | 5 | 13 | 90 | 0.5 | Uniform thickness, smooth surface and no pinhole |
| Example 7 | 3 | 12 | 80 | 0.4 | Uniform thickness, smooth surface and no pinhole |
| Example 8 | 4 | 12 | 79 | 0.4 | Uniform thickness, smooth surface and no pinhole |
In this application, the dispersibility and the stability of polyurethane resin and liquid cane wax in the type oil can be improved in the addition of extinction powder, prevent the precipitation or condense. As can be seen from examples 1 and 2 in table 2, in the present application, after the stabilizer matting powder was added, the resin and the liquid cane wax were sufficiently dissolved and dispersed by proper grinding, and the performances such as leveling property and adhesion of the release oil were relatively improved. From example 3, it can be seen that the addition of the adhesion enhancer, grinding to a fineness within 5 μm, and the addition of the stabilizer, grinding which is not complete, results in a larger final fineness of the release oil, an increase in the coefficient of friction, and a decrease in the adhesion. However, the matting agent cannot be ground too much after being added, and it is understood from the test results of example 4 that the stability of the matting agent is lowered and the performance of the release oil is lowered if the matting agent is added and the number of times of grinding is large.
In order to make the fineness of the release oil meet the requirement, grinding is needed in the preparation process of the release oil, but the grinding can relatively weaken the performance of raw materials such as resin and the like. Therefore, in the application, a small amount of PU-309 alcohol-soluble polyurethane is added before grinding, and more PU-309 alcohol-soluble polyurethane is added after grinding, so that the adhesive force and the leveling property of the polyurethane are improved while the requirement on the fineness of release oil is met. From the results of examples 2 and 5 to 8, it is understood that the release oil performance changes from low to high and then to low when the weight ratio of the alcohol-soluble polyurethane A component PU-309 to the alcohol-soluble polyurethane E component PU-309 is changed from (1:1.15) to (1:3), and the release oil performance is the best when the weight ratio of the alcohol-soluble polyurethane A component PU-309 to the alcohol-soluble polyurethane E component PU-309 is 1: 2.
Examples 9 to 15
The release oils for plastics of examples 9-15 were prepared according to the same method as in example 2, except that the amounts of the raw materials and the additives were different, as shown in Table 3.
TABLE 3 blending amounts (unit: g) of respective raw materials and auxiliary agents of release oils for plastics of examples 9 to 15
The release oils for plastics of examples 9-15 were tested for performance using the test standards described above and the results are shown in Table 4.
TABLE 4 results of measuring properties of release oils for plastics of examples 9 to 15
| Fineness of fineness | Viscosity of the oil | Adhesion force | Coefficient of friction | Leveling property | |
| Example 9 | 5 | 12 | 80 | 0.4 | Uniform thickness, smooth surface and no pinhole |
| Example 10 | 4 | 13 | 88 | 0.3 | Uniform thickness, smooth surface and no pinhole |
| Example 11 | 5 | 15 | 86 | 0.5 | Thickness of the filmUniform, smooth surface and no pinhole |
| Example 12 | 4 | 13 | 85 | 0.4 | Uniform thickness, smooth surface and no pinhole |
| Example 13 | 4 | 14 | 84 | 0.5 | Uniform thickness, smooth surface and no pinhole |
| Example 14 | 5 | 13 | 81 | 0.4 | Uniform thickness, smooth surface and no pinhole |
| Example 15 | 3 | 13 | 82 | 0.5 | Uniform thickness, smooth surface and no pinhole |
The applicant finds that the addition of the adhesion enhancer PU-518 alcohol-soluble polyurethane can improve the adhesion of the release oil. As can be seen from Table 4, when the amount of the adhesion enhancer was varied from small to large (examples 9 to 12), the adhesion of the release oil was changed from low to high and then to low, and when the amount of the adhesion enhancer was 10%, the combination property of the release oil was optimized. Because the adhesion enhancer PU-518 alcohol-soluble polyurethane is more easily dissolved in the isopropanol, after the adhesion enhancer PU-518 alcohol-soluble polyurethane is added, the mixing amount of the isopropanol in the solvent is relatively higher than that of the ethanol, and the integral dispersion uniformity of the release oil is improved. The detection results of the examples 13 to 15 show that the component F can meet the performance requirements of the release oil within the range of the mixture ratio of the composition F.
Examples 16 to 23
The release oils for plastics of examples 16 to 23 were prepared in the same manner as in example 2, except that the amounts of the raw materials and the additives were different, as shown in Table 5.
TABLE 5 blending amounts (unit: g) of respective raw materials and auxiliary agents of release oils for plastics of examples 16 to 23
The release oils for plastics of examples 16 to 23 were subjected to the performance test using the aforementioned test standards, and the test results are shown in Table 6.
TABLE 6 results of measuring properties of release oils for plastics of examples 16 to 23
| Fineness of fineness | Viscosity of the oil | Adhesion force | Coefficient of friction | Leveling property | |
| Example 16 | 4 | 13 | 88 | 0.5 | Uniform thickness, smooth surface and no pinhole |
| Example 17 | 4 | 14 | 80 | 0.3 | The surface is rough |
| Example 18 | 3 | 12 | 89 | 0.3 | Uniform thickness, smooth surface and no pinhole |
| Example 19 | 3 | 13 | 87 | 0.4 | Uniform thickness, smooth surface and no pinhole |
| Example 20 | 4 | 13 | 84 | 0.4 | Uniform thickness, smooth surface and no pinhole |
| Example 21 | 4 | 14 | 81 | 0.4 | Uniform thickness, smooth surface and no pinhole |
| Example 22 | 5 | 12 | 82 | 0.5 | Uniform thickness, smooth surface and no pinhole |
| Example 23 | 3 | 13 | 84 | 0.4 | Uniform thickness, smooth surface and no pinhole |
As shown in the test results of example 16 in Table 6, the matting agent OK-5 was used as the stabilizer, and the release oil was satisfactory in all aspects. The results of examples 17 to 19 show that when the amount of the stabilizer is 0.05%, the surface of the release oil film layer is relatively rough, and when the amount of the stabilizer is more than 0.1%, the comprehensive performance is not much different from 0.1%, so that the amount of the stabilizer is selected to be 0.1%.
The addition of the liquid cane wax mainly plays a role in surface smoothing. As can be seen from the results of the tests of examples 20 to 22, the liquid cane wax can provide better surface smoothness within the range of the doping amount of the present application.
Examples 24 to 27
The release oils for plastics of examples 24 to 27 were prepared in the same manner as in example 2, except that the amounts of the raw materials and the additives were different, as shown in Table 7.
TABLE 7 blending amounts (unit: g) of respective raw materials and auxiliary agents of release oils for plastics of examples 24 to 27
The release oils for plastics of examples 24 to 27 were subjected to the performance test using the aforementioned test standards, and the test results are shown in Table 8.
TABLE 8 results of testing the properties of the release oils for plastics of examples 24 to 27
| Fineness of fineness | Viscosity of the oil | Adhesion force | Coefficient of friction | Leveling property | |
| Example 24 | 3 | 13 | 83 | 0.3 | Uniform thickness, smooth surface and no pinhole |
| Example 25 | 4 | 14 | 82 | 0.4 | Uniform thickness, smooth surface and no pinhole |
| Example 26 | 5 | 12 | 80 | 0.5 | Uniform thickness, smooth surface and no pinhole |
| Example 27 | 3 | 13 | 84 | 0.4 | Uniform thickness, smooth surface and no pinhole |
The detection results in table 8 show that each solvent can be processed to obtain the release oil meeting the requirements within the scope of the application.
Example 28
The release oil for plastics in example 28 is the same as that of example 2 in the types and the amounts of the raw materials, and is prepared by the following preparation method: the component A, the component B, the component C, the component D, the adhesion enhancer, the stabilizer, the component E and the component F are added into a stirrer at one time, stirred for 10min at 1000r/min, and ground to the fineness of 5 μm at the same grinding speed as in example 2 to obtain the release oil.
Example 29
The release oil for plastics of example 29 was identical to that of example 2 in the kind and amount of each raw material except that the component D was added before the component C was added, and the rest was identical to that of example 2.
Comparative example 1
The release oil for plastics in the comparative example 1 is the same as the preparation method of the example 2, except that the mixing amount of the component B is 109g, and the mixing amount of the ethanol in the component C is 80 g; 130g of ethanol and 50g of isopropanol were contained in the component F, and the rest was the same as in example 2.
Comparative example 2
The release oil for plastics of comparative example 2 was the same as the preparation method of example 2 except that the adhesion enhancer was replaced with ethanol of equal mass, and the rest was the same as example 2.
Comparative example 3
The release oil for plastics of comparative example 3 was the same as the preparation method of example 2 except that the stabilizer was replaced with ethanol of equal mass, and the rest was the same as example 2.
Comparative example 4
The release oil for plastics of comparative example 4 is different from example 2 in that the amount of liquid cane wax blended in the component C is 100g, the amount of liquid cane wax blended in the component F is 30g, and the rest is the same as example 2.
Comparative example 5
The release oil for plastics of comparative example 5 specifically comprises the following raw materials in percentage by weight: the component A comprises: 100g of PU-309 alcohol-soluble polyurethane resin; and B component: 50g of isopropanol; and C, component C: 3g of liquid cane wax and 90g of ethyl acetate; and (D) component: 90g of isopropanol; 150g of adhesion enhancer TU-500 polyurethane resin; the matting powder of the stabilizer is OK-4121 g; and E, component (E): 20g of PU-30 alcohol-soluble polyurethane resin; and F component: 90g of ethyl acetate, 100g of liquid cane wax and 99g of isopropanol; in the preparation method, the component D and the component C are simultaneously added and uniformly mixed, and then added into the mixed solution of the component A and the component B, and the rest is the same as that of the embodiment 2.
Comparative example 6
The release oil for plastics of comparative example 6 is the same as the preparation method of example 2, except that the types and the mixing amounts of the raw materials are as follows: the component A comprises: 100g of PU-309 alcohol-soluble polyurethane resin; and B component: 50g of isopropanol; and C, component C: 3g of liquid cane wax and 130g of butanone; and (D) component: 50g of methylcyclohexane; adhesion enhancer dammar resin 150 g; the matting powder of the stabilizer is OK-4121 g; and E, component (E): 20g of PU-30 alcohol-soluble polyurethane resin; and F component: 139g of butanone, 100g of liquid cane wax and 50g of methylcyclohexane.
The release oils for plastics of examples 28 to 29 and comparative examples 1 to 6 were subjected to performance tests using the aforementioned test standards, and the test results are shown in Table 9.
TABLE 9 results of measuring Properties of Release oils for plastics of examples 28 to 29 and comparative examples 1 to 6
| Fineness of fineness | Viscosity of the oil | Adhesion force | Coefficient of friction | Leveling property | |
| Example 28 | 5 | 12 | 80 | 0.5 | Uneven thickness and pinholes on the surface |
| Example 29 | 4 | 14 | 80 | 0.4 | Uneven thickness and pinholes on the surface |
| Comparative example 1 | 5 | 13 | 73 | 0.4 | Uneven thickness and rough surface |
| Comparative example 2 | 4 | 14 | 65 | 0.3 | Uniform thickness, smooth surface and no pinhole |
| Comparative example 3 | 5 | 15 | 68 | 0.5 | Uneven thickness and rough surface |
| Comparative example 4 | 3 | 13 | 80 | 0.3 | Rough surface |
| Comparative example 5 | 4 | 9 | 74 | 0.3 | Uneven thickness and pinholes on the surface |
| Comparative example 6 | 5 | 15 | 70 | 0.4 | Uneven thickness and pinholes on the surface |
The results of example 28 in Table 9 show that the use of a one-shot addition-mixing process may result in a decrease in release oil leveling and unsatisfactory adhesion. The results of example 29 show that the water of component D cannot be added in advance, otherwise the mixture would have a sticky reaction, resulting in a decrease in the leveling of the release oil. The results of comparative example 1 show that the amounts of ethanol added before and after the addition of isopropanol are peculiar in the present application, and that the solubility of the adhesion enhancer and the components A and E should be considered in combination. The results of the comparative example 2 and the comparative example 3 show that the adhesion reinforcing agent has great influence on the adhesion of the release oil, and the stabilizer has influence on the overall comprehensive performance of the release oil. The result of the comparative example 4 shows that if more liquid cane wax is added in the early stage, the smoothness of the liquid cane wax is damaged, various performances of a resin system are affected, the surface tension of a printing surface is uneven, the adhesive force is reduced, and the performance of the final product is affected. According to the detection results of the comparative examples 5-6, the friction coefficient of the release oil meets the requirement after the dammar resin and the TU-500 polyurethane resin are selected as the adhesion reinforcing agent, but the adhesion is seriously reduced, the solubility is poor, and the leveling property is poor.
Example 30
A tearing convex edge is arranged on one side of a dry mixing instant bowl cover, the tearing convex edge is pinched by a hand, and water can be poured into the side dry mixing instant bowl cover after the bowl cover is torn; the other side of the water filtering hole is provided with a water filtering hole for pouring out water in the dry mixing instant bowl; the composite paper comprises a PET layer, a pattern layer, a copper plate paper layer, a PET layer, an LDPE layer, an aluminum foil layer, a PET layer, a functional layer and a heat sealing layer in sequence from outside to inside; wherein, the printing of PET in situ surface between copper sheet ply and LDPE layer has from type oil, and is from the printing district of type oil for from the type district, and this bowl lid is processed through following step and is obtained:
compounding the coated paper/PET layer: carrying out corona treatment on the surface of one side of a BOPET film with the thickness of 12 mu m, and coating a non-corona surface with a single-component polyurethane hot melt adhesive EH 301X at the temperature of 98 ℃; coating the PET glue side with 80g/m by a solvent-free compound machine2The coated paper is compounded together and cured for 5 hours at the temperature of 45 ℃ to obtain a No. 1 semi-finished product;
printing a pattern layer and release oil: printing a pattern layer on the surface of the coated paper of the No. 1 semi-finished product by using a reverse printer; after the reverse rotation, the release oil of example 2 with the thickness of 1.5 μm is printed on the release area of the corona surface of No. 1 semi-finished product PET, the printing speed is 150m/min, and the air volume of the printing unit is 4000m3Drying at 70 +/-2 ℃ after printing to fully dry the release oil and prevent anti-sticking so as to obtain a No. 2 semi-finished product; wherein the release oil is diluted by a diluent, and the weight ratio of the diluent to the release oil is 1: 1.2; the diluent is a mixture of ethanol and isopropanol, and the weight ratio of the ethanol to the isopropanol is 7: 3;
compounding an aluminum foil/PET layer: compounding aluminum foil with thickness of 6 μm and BOPET film with thickness of 12 μm with two-component acrylic water-based adhesive LA6201 by a drying machine, wherein the coating amount is 2.2g/m2Curing at 45 ℃ for 12h to form a No. 3 semi-finished product;
extrusion compounding: adding LDPE into an extruder A in an extruding and compounding mode by adopting an extruder, and bonding the aluminum foil layer of the No. 3 semi-finished product and the side of the No. 2 semi-finished product printed with release oil together at the resin temperature of 317 +/-1 ℃ and the die lip temperature of 325 +/-5 ℃, wherein the thickness of the LDPE layer is 23 mu m; then, LDPE (low-density polyethylene) is added into an extruder B, Japanese Dow EVA resin and Japanese Tosoh EMAA resin are added into an extruder C, and a 28-micron-thick LDPE functional layer and a 18-micron-thick heat sealing layer are compounded on the surface of a No. 3 semi-finished product PET layer coated with 4100AC glue at the resin temperature of 317 +/-1 ℃ and the die lip temperature of 325 +/-5 ℃ to obtain a No. 4 semi-finished product;
pattern of No. 4 semi-finished product by using single-component polyurethane hot melt adhesive EH 301XThe surface of the layer is compounded with a surface BOPET film with the thickness of 12 mu m, and the gluing amount is 3.3g/m2Curing for 24 hours at 45 ℃; then, sequentially carrying out slitting, die pressing and die cutting to obtain a finished product of the dry-mixed instant bowl cover;
when in mould pressing, the upper cutter cuts the PET/pattern layer/coated paper/PET thoroughly according to the thickness and can not cut the LDPE layer in the coated paper layer/PET layer/LDPE layer/aluminum foil layer; the lower cutter cuts the LDPE layer, and the upper cutter and the lower cutter are combined to press a tearable area and a water filtering hole; the release area is an area except the water filtering holes in the tearable area; when water in the dry-mixing instant bowl needs to be poured out, the tearable area is torn, the LDPE layer/aluminum foil layer/PET layer/functional layer/heat sealing layer originally sealed in the water filtering hole is not printed with release oil at the corresponding position of the tearable area, so that the tearable area is torn along with the tearable area when torn, the water filtering hole is exposed, the water in the dry-mixing instant bowl is poured out from the water filtering hole, and the noodle is left in the bowl.
Example 31
A lid for a dry-mix instant bowl of example 31 is different from that of example 30 in that:
printing a pattern layer and release oil: printing a pattern layer on the surface of the coated paper of the No. 1 semi-finished product by using a reverse printer; after the reverse rotation, the release oil of example 2 with the thickness of 1.5 μm is printed on the release area of the corona surface of No. 1 semi-finished product PET, the printing speed is 130m/min, and the air volume of the printing unit is 3000m3H, drying at 70 +/-2 ℃ to obtain a No. 2 semi-finished product; wherein the release oil is diluted by a diluent, and the weight ratio of the diluent to the release oil is 1: 1; the diluent is a mixture of ethanol and isopropanol, and the weight ratio of the ethanol to the isopropanol is 7: 3; the rest is the same as in example 30.
Example 32
A lid for a dry-mix instant bowl of example 32 is different from that of example 30 in that:
printing a pattern layer and release oil: printing a pattern layer on the surface of the coated paper of the No. 1 semi-finished product by using a reverse printer; after the reverse rotation, the release oil of example 2 with the thickness of 1.5 μm is printed on the release area of the corona surface of No. 1 semi-finished product PET, the printing speed is 125m/min, and the air volume of the printing unit is 4000m3H, drying at 70 +/-2 ℃ to obtain a No. 2 semi-finished product; wherein, the release oilDiluting by a diluent, wherein the weight ratio of the diluent to the release oil is 1: 0.7; the diluent is a mixture of ethanol and isopropanol, and the weight ratio of the ethanol to the isopropanol is 5: 5; the rest is the same as in example 30.
Example 33
A lid for a dry-mix instant bowl according to example 33 is different from example 30 in that:
printing a pattern layer and release oil: printing a pattern layer on the surface of the coated paper of the No. 1 semi-finished product by using a reverse printer; after the reverse rotation, the release oil of example 2 with the thickness of 1.5 μm is printed on the release area of the corona surface of No. 1 semi-finished product PET, the printing speed is 100m/min, and the air volume of the printing unit is 4000m3H, drying at 70 +/-2 ℃ to obtain a No. 2 semi-finished product; wherein the release oil is diluted by a diluent, and the weight ratio of the diluent to the release oil is 1: 0.6; the diluent is a mixture of ethanol and isopropanol, and the weight ratio of the ethanol to the isopropanol is 5: 5; the rest is the same as in example 30.
Examples 34 to 36
Dry-mix instant bowl lids of examples 34 to 36 are different from example 30 in that: the release oils of examples 1 and 3-4 were used as the release oil for printing, and the rest was the same as example 30.
Examples 37 to 38
Dry-mix instant bowl lids of examples 37 to 38 are different from example 30 in that: the release oils of examples 28-29 were used for the printing, and the rest were the same as in example 30.
Comparative examples 5 to 8
The instant dry-mix bowl lids of comparative examples 5 to 8 are different from example 30 in that: the release oils of comparative examples 1 to 4 were used for the release oils required for printing, and the rest were the same as in example 30.
Comparative example 9
The instant dry-mix bowl cover of comparative example 9 is different from example 30 in that: selecting the release oil of comparative example 5 for the release oil required by printing, wherein the diluent adopted before the release oil is printed is a mixture of ethyl acetate and isopropanol, the weight ratio of the ethyl acetate to the isopropanol is 1:1, the dilution ratio is that the weight ratio of the release oil to the diluent is 1:1, and the printing speed is 150 m/min; the rest is the same as in example 30.
Comparative example 10
The instant dry-mix bowl cover of comparative example 10 is different from example 30 in that:
extrusion compounding: adding DuPont AE ethylene-methacrylic acid copolymer into an extruder A in an extruding and compounding mode by adopting an extruder, and bonding the aluminum foil layer of the No. 3 semi-finished product and the side of the No. 2 semi-finished product printed with release oil together at the resin temperature of 280 +/-1 ℃ and the die lip temperature of 285 +/-5 ℃, wherein the thickness of the ethylene-methacrylic acid copolymer layer is 23 mu m; the subsequent operations were the same as in example 30.
The performance of the dry-mix instant bowl lids of examples 30 to 38 and comparative examples 5 to 10 was measured by the following measurement standards and measurement methods, and the measurement results are shown in tables 10 and 11:
water pouring adaptability: the bowl cover is qualified if the bowl cover is not damaged in the water pouring process and after the water pouring is finished; if the damage exists, the product is unqualified; water pouring speed: the time taken for pouring the water in the bowl is less than or equal to 20s, the water is qualified, otherwise, the water is unqualified; wherein the hot water amount in each test bowl is the same;
and (3) sprinkling flour: in the process of pouring water, the flour in the bowl is qualified without being spilled out; otherwise, the product is unqualified;
detecting the performance of the tearable area: injecting 100 deg.C hot water from the water-adding side of the bowl, sealing, and keeping for 3 min; tearing the tearable area, detecting whether the tearable area is stripped, and whether the hole is remained or the hole falls down due to the decrease of the bonding strength of the water filtering hole part, specifically: stripping property, qualified as no adhesive residue; if the residues exist, the opening is not completely opened, or the bonding residues exist after the tearing, the product is unqualified; residual in pores: the lower piece of the water filtering hole is torn along with the tearable area, and the water filtering hole is exposed and qualified; the lower sheet is remained and sealed in the water filtering hole, and the lower sheet is unqualified;
the hole falls: the lower piece of the water filtering hole is torn along with the tearable area, but falls off from the tearable area, and is unqualified; if the material is not fallen off, the material is qualified;
migration of the release area: after the tearable area is torn, the contour line of the release area is well overlapped with the contour line of the mould pressing line; the contour line of the release area which is not overlapped but is larger than the contour line of the mould pressing line is qualified; otherwise, the product is unqualified;
TABLE 10 results of performance tests of the lids of examples 30 to 36
TABLE 11 results of performance test of the bowl caps of examples 37 to 38 and comparative examples 5 to 10
From the detection results of the examples 30 to 33 in the table 10, it can be seen that the bowl cover tearable area obtained by printing has excellent comprehensive performance under the conditions that the adhesive force is 80 to 90%, the fineness is within 5 μm, the viscosity is 12 to 14s, the friction coefficient is 0.3 to 0.5, and the leveling property is good; moreover, by adopting the release oil, the final release effect reaches the standard after the dilution ratio is adjusted no matter the speed of the vehicle is faster or slower in the printing process; no hole residue, no hole drop, no migration problem of a release area and excellent performance. From the test results of example 34, it was found that when the release oil was processed, the leveling property of the release oil was poor because the polishing was not performed after the stabilizer matting agent was added, and the peel performance of the tearable area of the bowl lid was poor. From the test results of example 35, it can be seen that if the friction coefficient is large due to insufficient grinding in the process of processing the release oil, the problem of hole residue of the bowl cover can occur. The test result of example 36 shows that the stabilizing effect of the stabilizer is weakened by grinding for a plurality of times after the stabilizer is added, and the release effect of the release oil is adversely affected.
The test results of example 37 in table 11 show that the one-time mixing process affects the leveling property of the release oil, and adversely affects the peelability of the bowl lid in the tearable region. As can be seen from the test results of example 38, the leveling property of the release oil is affected after the D component water is added in the processing of the release oil, and the peelable area peeling property of the bowl cover is still adversely affected. According to the detection result of the comparative example 5, the proportion of the solvent in the release oil has great influence on the adhesive force of the release oil, so that the peeling performance of the tearable area of the bowl cover is adversely affected, and the problems of hole residue and migration of the release area can be caused. The detection results of the comparative examples 6 to 8 show that the adding time and the mixing amount of the adhesion enhancer, the stabilizer and the liquid cane wax in the release oil have great influence on the adhesion of the release oil, and when the adhesion of the release oil is lower than 80 percent, the stripping performance of the tearable area cannot reach the standard; wherein, the performance of the tearable area is greatly influenced by the stabilizer and the liquid cane wax. The detection result of the comparative example 9 shows that the adhesion enhancer adopts TU-500 polyurethane resin, which can reduce the adhesion of release oil, and cause the problems of poor stripping performance of a tearable area of the bowl cover and residual holes. The test result of the comparative example 10 shows that when LDPE is replaced by other organic polymer on the side printed with release oil on the aluminum foil layer and the coated paper, the adhesion force between the drainage hole lower sheet and the side printed with release oil on the coated paper is not enough, resulting in the problems of hole residue and hole falling.
The bowl covers of example 30 and comparative example 10 were tested for peel strength performance using the test standard GB/T2791-.
Table 12 results of performance test of the bowl covers of example 30 and comparative example 10
The detection results in table 12 show that the peel strength between the composite layers of the bowl cover processed by the processing technology and the material is greater than 1.6N/15mm, and the index requirements of the dry-mixed instant bowl cover are met. The test result of comparative example 10 shows that the peel strength between the composite layers of the bowl cover is reduced if LDPE is replaced with another resin bonding layer.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of the present application is not limited by the embodiments of the present application, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The release oil for the plastic is characterized by being prepared from the following raw materials in percentage by weight:
the component A comprises: 7-13% of alcohol-soluble polyurethane resin;
and B component: 3-8% of isopropanol;
and C, component C: 2-5% of liquid cane wax and 10-15% of ethanol;
and (D) component: 3-8% of water;
7-13% of adhesion enhancer;
0.05 to 0.2 percent of stabilizer;
and E, component (E): 15-23% of alcohol-soluble polyurethane resin;
and F component: 5-10% of ethanol, 3-8% of water, 8-13% of liquid cane wax and 8-15% of isopropanol;
the adhesion reinforcing agent is PU-518 polyurethane resin;
the release oil for the plastic is prepared by the following method:
mixing the component A and the component B, and stirring uniformly; adding the component C, and uniformly stirring; adding the component D, and uniformly stirring; adding an adhesion enhancer, and stirring until no precipitate exists; adding a stabilizer, grinding and dispersing, and uniformly stirring; adding the component E, and uniformly stirring; adding the component F, and uniformly stirring to obtain release oil for plastics;
the release oil is applied between the PET/aluminum foil layers extruded and compounded in the plastic bowl cover and is printed on the surface of the PET through double-plate overprinting.
2. The release oil for plastics according to claim 1, characterized in that: the stabilizer is matting powder, and the particle size of the matting powder is not more than 5 microns.
3. The release oil for plastics according to claim 1, characterized in that: adding stabilizer, stirring, grinding to fineness not more than 5 μm, and adding component E.
4. A processing technology of a dry mixing instant bowl cover is characterized by comprising the following processing steps:
compounding the coated paper/PET layer: compounding the coated paper and the PET film to obtain a No. 1 semi-finished product;
printing a pattern layer and release oil: printing the release oil according to any one of claims 1-3 on a release area on the surface of the No. 1 semi-finished product PET by adopting double-plate overprinting, and drying to obtain a No. 2 semi-finished product;
compounding an aluminum foil/PET layer: laminating the aluminum foil and another PET film together with an aqueous adhesive to form a No. 3 semi-finished product;
extrusion compounding: bonding the aluminum foil layer of the No. 3 semi-finished product and the side of the No. 2 semi-finished product printed with release oil together, and then compounding a functional layer and a heat sealing layer on the surface of the No. 3 semi-finished product PET layer to obtain a No. 4 semi-finished product;
and (3) compounding a PET film on the surface of the pattern layer of the No. 4 semi-finished product, and then sequentially carrying out slitting, die pressing and die cutting to obtain the finished product of the dry-mixed instant bowl cover.
5. The process for processing a dry mix instant bowl lid according to claim 4, wherein: before printing release oil, a pattern layer is printed on the surface of the coated paper, and after reversal, the release oil is printed in a release area on the surface of No. 1 semi-finished product PET.
6. The process for processing a dry mix instant bowl lid according to claim 4, wherein: before printing with the release oil, the release oil is diluted in the following way: when the printing speed is 130-150m/min, diluting the release oil according to the weight ratio of the diluent to the release oil of 1 (1-1.2); when the printing speed is 100-125m/min, the release oil is diluted according to the weight ratio of the diluent to the release oil of 1 (0.6-0.7).
7. The process for processing a dry mix instant bowl lid according to claim 6, wherein: the diluent comprises ethanol and isopropanol, and the weight ratio of the ethanol to the isopropanol is (5-7) to (3-5).
8. A dry mix instant bowl lid obtainable by the process according to any one of claims 4 to 7.
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