CN110293733B - Silicone oil release liner paper and preparation method thereof - Google Patents
Silicone oil release liner paper and preparation method thereof Download PDFInfo
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- CN110293733B CN110293733B CN201910465211.5A CN201910465211A CN110293733B CN 110293733 B CN110293733 B CN 110293733B CN 201910465211 A CN201910465211 A CN 201910465211A CN 110293733 B CN110293733 B CN 110293733B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/84—Paper comprising more than one coating on both sides of the substrate
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
Abstract
The invention discloses a silicone oil release liner paper and a preparation method thereof, and the silicone oil release liner paper comprises an aluminum foil, base paper, a composite adhesive layer and a silicone oil coating, wherein the aluminum foil is compositely bonded on the base paper through the composite adhesive layer to form an aluminum foil paper, the silicone oil coating is coated on the surface layer of the aluminum foil paper, and a laminating layer is also arranged between the base paper and the silicone oil coating. After a silicone oil coating is formed on the surfaces of the raw material aluminum foil and the raw paper in advance, the silicone oil coating is glued and compounded, so that the smoothness of the silicone oil release liner paper can be obviously improved, the acrylic resin serving as a film forming agent can uniformly disperse and cover the silicone oil on the surface of the paper or the aluminum foil, the silicone oil coating is thin, the silicone oil coating is tightly adhered and is not easy to fall off, and the organic solvent and water resistance is enhanced; the aluminum foil is pre-cured with a silicone oil coating, so that scratching and dryness caused by the subsequent extrusion compounding step can be effectively prevented, and the aluminum foil paper is smooth and bright; the moisture-proof aluminum foil paper has the moisture-proof performance of release paper, has the bright appearance of aluminum foil paper, further improves the performance of blocking moisture from entering and exiting, and maintains the stable environment in cigarette packages.
Description
Technical Field
The invention relates to the field of aluminum foil lining paper, in particular to silicone oil release lining paper and a preparation method thereof.
Background
Cigarette packaging is an important component of cigarette production and is the last process of the whole production process. In the whole process of cigarette production, circulation and consumption, the quality of the packaging material plays an important role in maintaining the quality of cigarette products, promoting sales and guiding consumption. The requirements for cigarette packaging materials have certain specificities over other commercial products, such as: the paint has no peculiar smell, is nontoxic and harmless to human bodies, and has certain moisture resistance, isolation property and the like.
The aluminum foil paper for the cigarettes is formed by bonding 10-20 micron thick aluminum foil and 20-70 micron thick paper through glue, and mainly has the effects of wrapping the cigarettes in the cigarette box, maintaining the required storage environment of the cigarettes, keeping the moisture of the cigarettes and delaying the loss of cigarette flavor components.
The release paper is also called as isolation paper, release paper and silicone oil paper. The release paper can prevent the adhesion of the prepreg and can also protect the prepreg from being polluted. The release paper is made of paper coated with anti-sticking substances, the types of the release paper are distinguished according to the differences of materials, thickness, elongation and single and double surfaces, and the release paper is generally prepared by single-sided or double-sided coating of silicone oil.
When the aluminum foil lining paper is produced, the problems that the surface of the aluminum foil is easy to scratch, dry and astringent, poor in brightness and the like in the compounding process of a product are often encountered during aluminum foil compounding, and the moisture-proof effect of cigarettes packed by compounding the aluminum foil and the paper is poor. Therefore, the development of the high-brightness aluminum foil lining paper with excellent isolation and moisture resistance of the release paper is of great significance.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problems or defects existing in the preparation of the lining paper for packaging cigarettes at present, the invention provides the silicone oil release lining paper and the preparation method thereof, so that the aluminum foil is smoother and smoother during compound bonding, the brightness of the aluminum foil is improved, the moisture resistance of the lining paper is improved, and the production cost is reduced.
In order to solve the technical problems, the invention provides the following technical scheme:
the silicone oil release liner paper comprises an aluminum foil, base paper, a composite adhesive layer and a silicone oil coating, wherein the aluminum foil is compounded and bonded on the base paper through the composite adhesive layer to form aluminum foil paper, the upper surface layer of the aluminum foil and the lower surface layer of the base paper are coated with the silicone oil coating, and a laminating layer is further coated between the base paper and the silicone oil coating.
Preferably, the thickness of the aluminum foil is 15-25 μm, the thickness of the base paper is 40-60 μm, the thickness of the composite adhesive layer is 4.2-7.5 μm, and the thickness of the laminating layer is 2.2-5.3 μm.
Preferably, the silicone oil coating is prepared from absolute ethyl alcohol, acrylate resin, silicone oil and a photoinitiator, wherein the absolute ethyl alcohol: acrylate resin: silicone oil: the weight ratio of the photoinitiator is 1:4:5: 1; the laminating layer is formed by laminating low-density polyethylene on one side of base paper.
Preferably, the acrylate resin is prepared from the following raw materials in parts by weight: 20-45 parts of acrylic ester 996, 14-28 parts of acrylic ester 983, 1-10 parts of 2 (2-ethoxyethoxy) ethyl acrylate, 5-15 parts of tripropylene glycol diacrylate and 10-20 parts of trimethylolpropane triacrylate; the silicone oil is composed of one or more of methyl silicone oil, benzyl silicone oil, acrylate modified organic silicon, methyl hydrogen-containing silicone oil and hydroxyl silicone oil; the specific gravity of the low-density polyethylene is 0.912-0.921 g/cm3。
The preparation method of the silicone oil release liner paper comprises the following specific steps: .
(1) Prefabricating a silicone oil coating liquid raw material: weighing an acrylic resin raw material, mixing and sealing the acrylic resin raw material, putting the acrylic resin raw material into a 65-75 ℃ oven, adding silicone oil after the viscosity is reduced, uniformly stirring, standing and removing bubbles to obtain an acrylic resin mixed solution; melting a photoinitiator at 45-55 ℃, dropwise adding the melted photoinitiator into the uniformly mixed acrylic resin mixed solution, adding absolute ethyl alcohol, fully stirring and mixing, and standing in an oven at 20-40 ℃ for 12-14 hours after uniform mixing to fully remove bubbles in the mixed solution;
(2) preparing a silicon oil coating aluminum foil: uniformly pouring a silicon oil coating liquid raw material on an aluminum foil along the width direction of the aluminum foil, coating a coating on the surface of the aluminum foil by using a film scraper in a blade coating method, quickly conveying the coated aluminum foil to a pre-opened conveyor belt type ultraviolet curing machine for ultraviolet curing, slowly removing the aluminum foil from the other side of the ultraviolet curing machine, and finishing curing of the coating;
(3) taking polyethylene as a raw material, performing single-side film coating on raw paper by using a film coating machine to obtain film coated paper, and winding the film coated paper after cooling for later use; preparing a silicone oil coating on the film-coated surface of the film-coated paper, repeating the steps (1) and (2) in the preparation method, and brushing the composite adhesive on the surface which is not coated with the film;
(4) and (3) carrying out double-roller extrusion composite bonding on the surface without the silicone oil coating on the silicone oil coating aluminum foil and the laminating paper, and directly conveying the bonded aluminum foil paper into a dryer to be dried for 15-25 min at the temperature of 150-180 ℃ to obtain the aluminum foil paper
Preferably, the step (3) further comprises base paper pretreatment: blowing off dust and impurities on the surface of the base paper by using a fan, and uniformly spraying water mist, wherein the spraying amount is 70-100 g/m2And after flattening, drying by a hot air blower until the water content is 10-15%, and taking out for the subsequent film spraying step.
Preferably, the parameters of the film coating machine are that the extrusion temperature is 280-320 ℃, the die head temperature is 320-330 ℃, the melt temperature is 320-340 ℃, and the mirror roller cooling water temperature is 10-15 ℃.
The invention has the following beneficial effects:
1. the silicone oil has good heat resistance, hydrophobicity and smaller surface tension, can enhance the brightness of paper when applied to the aluminum-foil paper, enables the surface to be smooth and soft, and can better prevent the loss and the intervention of water. The acrylate resin as a film forming agent can uniformly disperse and cover the silicone oil on the surface of paper or aluminum foil, so that the silicone oil coating is thin, tightly adhered and not easy to fall off, and the organic solvent and water resistance is enhanced;
2. the aluminum foil is pre-cured with a silicone oil coating, so that the aluminum foil is smooth and soft, the conformability of the aluminum foil to paper is improved, the scratching and dryness caused by the subsequent extrusion compounding step are effectively prevented, and the aluminum foil paper is smooth and bright; the moisture-proof aluminum foil paper has the moisture-proof performance of release paper, has the bright appearance of aluminum foil paper, further improves the performance of blocking moisture from entering and exiting, and maintains the stable environment in cigarette packages.
3. The paper drenches the leveling nature that the membrane was drenched to the retention certain water content after leveling before the membrane, for follow-up composite aluminum foil provides good roughness, reduces the phenomenon that the paper curls the rake in the time of compounding, drenches the membrane and the moisture of bonding stoving in-process at high temperature and volatilizes gradually, and the water content in the slip sheet is extremely low in the finished product, does not influence the moisture barrier of cigarette package.
4. The base paper is coated with the silicone oil coating after being subjected to film spraying, so that the absorption of the base paper to the silicone oil can be effectively reduced, the oil consumption of the base paper is reduced, the material consumption of the raw material of the silicone oil coating is reduced, and the production cost is reduced. The silicone oil coating adopts an ultraviolet irradiation rapid curing process, so that the film forming time can be shortened, the film stability is increased, and the production efficiency is improved.
5. The smoothness of silicone oil release liner paper can be obviously improved by gluing and compounding after silicone oil coatings are formed on the surfaces of raw material aluminum foils and base paper in advance, if aluminum foil paper is directly adopted to coat the silicone oil coatings, the aluminum foil on the surface is embrittled at high temperature of film coating, the gloss is reduced, the paper has the phenomena of corrugation upwarp and the like, and the packaging use is influenced.
Drawings
FIG. 1 is a schematic structural view of a silicone oil release liner paper layer according to the present invention;
1-silicone oil coating, 2-aluminum foil, 3-composite glue layer, 4-base paper, 5-laminating layer and 6-silicone oil coating.
Detailed Description
The following examples are included to provide further detailed description of the present invention and to provide those skilled in the art with a more complete, concise, and exact understanding of the principles and spirit of the invention.
Example 1: silicone oil release liner paper is prepared according to the following method
Firstly, preparing raw materials:
the thickness of the aluminum foil is 15 mu m, and the thickness of the base paper is 40 mu m;
weighing the raw materials of the acrylate resin in parts by weight as follows: 20 parts of acrylate 996, 14 parts of acrylate 983, 1 part of 2 (2-ethoxyethoxy) ethyl acrylate, 5 parts of tripropylene glycol diacrylate and 10 parts of trimethylolpropane triacrylate; mixing and sealing the raw materials of the acrylate resin, and putting the mixture into a 65 ℃ oven for 20min to prepare the acrylate resin.
The silicone oil is formed by mixing methyl silicone oil and acrylate modified organic silicon according to the mass ratio of 1: 3;
the specific gravity of the low-density polyethylene is 0.912g/cm3. The photoinitiator was photoinitiator 184.
Secondly, preparing silicone oil release liner paper, comprising the following steps:
(1) prefabricating a silicone oil coating liquid raw material: according to the weight percentage of absolute ethyl alcohol: acrylate resin: silicone oil: weighing the raw materials according to the weight ratio of 1:4:5:1 of the photoinitiator, heating the acrylic resin to 65 ℃, adding silicone oil after the viscosity is reduced, uniformly stirring, standing and removing bubbles to obtain acrylic resin mixed solution; melting a photoinitiator at 45 ℃, dropwise adding the photoinitiator into the uniformly mixed acrylic resin mixed solution, adding absolute ethyl alcohol, fully stirring and mixing, and standing in a 20 ℃ oven for 12 hours after uniform mixing to fully remove bubbles in the mixed solution;
(2) preparing a silicon oil coating aluminum foil: uniformly pouring a silicon oil coating liquid raw material on an aluminum foil along the width direction of the aluminum foil, coating a coating on the surface of the aluminum foil by using a film scraper in a blade coating method, quickly conveying the coated aluminum foil to a pre-opened conveyor belt type ultraviolet curing machine for ultraviolet curing, wherein the conveying speed is 5m/min, the irradiation time is 12s, slowly moving the aluminum foil out from the other side of the ultraviolet curing machine, and finishing curing of the coating;
(3) blowing off dust and impurities on the surface of the base paper by using a fan, and uniformly spraying water mist, wherein the spraying amount is 70g/m2Drying the film by a hot air blower after flattening until the water content is 10 percent, and taking out the film for the subsequent film coating step; taking low-density polyethylene as a raw material, performing single-side film coating on base paper by using a film coating machine to obtain film coated paper, cooling the film coated paper, and rolling for later use, wherein the parameters of the film coating machine are extrusion temperature of 280 ℃, die head temperature of 320 ℃, melt temperature of 320 ℃ and mirror roller cooling water temperature of 10 ℃; preparing a silicone oil coating on the film-coated surface of the film-coated paper, repeating the steps (1) and (2) in the preparation method, and brushing the composite adhesive on the surface which is not coated with the film;
(4) and (3) carrying out double-roller extrusion composite bonding on the surface without the silicone oil coating on the silicone oil coating aluminum foil and the laminating paper, and directly conveying the bonded aluminum foil paper into a dryer to dry for 15min at 150 ℃.
The thickness of the composite adhesive layer is measured to be 4.2 mu m by adopting an electric vortex coating thickness meter, and the thickness of the laminating layer is 2.2 mu m.
Example 2: silicone oil release liner paper is prepared according to the following method
Firstly, preparing raw materials:
the thickness of the aluminum foil is 25 μm, and the thickness of the base paper is 60 μm;
weighing the raw materials of the acrylate resin in parts by weight as follows: 45 parts of acrylate 996, 28 parts of acrylate 983, 10 parts of 2 (2-ethoxyethoxy) ethyl acrylate, 15 parts of tripropylene glycol diacrylate and 20 parts of trimethylolpropane triacrylate; mixing and sealing the raw materials of the acrylate resin, and putting the mixture into a 75 ℃ oven for 30min to prepare the acrylate resin.
The silicone oil comprises one or more of benzyl silicone oil, acrylate modified silicone and hydroxyl silicone oil;
the specific gravity of the low density polyethylene is 0.921g/cm3. The photoinitiator was prepared using photoinitiator 184 and photoinitiator 1173 as a 1: 1 mass ratio.
Secondly, preparing silicone oil release liner paper, comprising the following steps:
(1) prefabricating a silicone oil coating liquid raw material: according to the weight percentage of absolute ethyl alcohol: acrylate resin: silicone oil: weighing the raw materials according to the weight ratio of 1:4:5:1 of the photoinitiator, heating the acrylic resin to 75 ℃, adding silicone oil after the viscosity is reduced, uniformly stirring, standing and removing bubbles to obtain acrylic resin mixed solution; melting a photoinitiator at 55 ℃, dropwise adding the photoinitiator into the uniformly mixed acrylic resin mixed solution, adding absolute ethyl alcohol, fully stirring and mixing, and standing in a 40 ℃ oven for 14 hours after uniform mixing to fully remove bubbles in the mixed solution;
(2) preparing a silicon oil coating aluminum foil: uniformly pouring a silicon oil coating liquid raw material on an aluminum foil along the width direction of the aluminum foil, coating a coating on the surface of the aluminum foil by using a film scraper in a blade coating method, quickly conveying the coated aluminum foil to a pre-opened conveyor belt type ultraviolet curing machine for ultraviolet curing, wherein the conveying speed is 1m/min, the irradiation time is 60s, slowly moving the aluminum foil out from the other side of the ultraviolet curing machine, and finishing curing of the coating;
(3) blowing off dust and impurities on the surface of the base paper by using a fan, and uniformly spraying water mist, wherein the spraying amount is 100g/m2Drying by a hot air blower after flattening until the water content is 15%, and taking out for the subsequent film coating step; taking low-density polyethylene as a raw material, performing single-side film coating on base paper by using a film coating machine to obtain film coated paper, cooling the film coated paper, and rolling for later use, wherein the parameters of the film coating machine are extrusion temperature 320 ℃, die head temperature 330 ℃, melt temperature 340 ℃ and mirror roller cooling water temperature 15 ℃; preparing a silicone oil coating on the film-coated surface of the film-coated paper, repeating the steps (1) and (2) in the preparation method, and brushing the composite adhesive on the surface which is not coated with the film;
(4) and (3) carrying out double-roller extrusion composite bonding on the surface without the silicone oil coating on the silicone oil coating aluminum foil and the laminating paper, and directly conveying the bonded aluminum foil paper into a dryer to dry for 25min at 180 ℃.
The thickness of the composite adhesive layer is measured to be 7.5 mu m by adopting an electric vortex coating thickness meter, and the thickness of the laminating layer is 5.3 mu m.
Example 3: silicone oil release liner paper is prepared according to the following method
Firstly, preparing raw materials:
the thickness of the aluminum foil is 20 μm, and the thickness of the base paper is 50 μm;
weighing the raw materials of the acrylate resin in parts by weight as follows: 32 parts of acrylate 996, 21 parts of acrylate 983, 5 parts of 2 (2-ethoxyethoxy) ethyl acrylate, 10 parts of tripropylene glycol diacrylate and 15 parts of trimethylolpropane triacrylate; mixing and sealing the raw materials of the acrylate resin, and then putting the mixture into a 70 ℃ oven for 25min to prepare the acrylate resin.
The silicone oil is methyl hydrogen-containing silicone oil; the specific gravity of the low density polyethylene is 0.917g/cm3. The photoinitiator was a photoinitiator 1173.
Secondly, preparing silicone oil release liner paper, comprising the following steps:
(1) prefabricating a silicone oil coating liquid raw material: according to the weight percentage of absolute ethyl alcohol: acrylate resin: silicone oil: weighing the raw materials according to the weight ratio of 1:4:5:1 of the photoinitiator, heating the acrylic resin to 70 ℃, adding silicone oil after the viscosity is reduced, uniformly stirring, standing and removing bubbles to obtain acrylic resin mixed solution; melting a photoinitiator at 50 ℃, dropwise adding the photoinitiator into the uniformly mixed acrylic resin mixed solution, adding absolute ethyl alcohol, fully stirring and mixing, and standing in a 30 ℃ oven for 13 hours after uniform mixing to fully remove bubbles in the mixed solution;
(2) preparing a silicon oil coating aluminum foil: uniformly pouring a silicon oil coating liquid raw material on an aluminum foil along the width direction of the aluminum foil, coating a coating on the surface of the aluminum foil by using a film scraper in a blade coating method, quickly conveying the coated aluminum foil to a pre-opened conveyor belt type ultraviolet curing machine for ultraviolet curing, wherein the conveying speed is 3m/min, the irradiation time is 20s, slowly moving the aluminum foil out from the other side of the ultraviolet curing machine, and finishing curing of the coating;
(3) blowing off dust and impurities on the surface of the base paper by using a fan, and uniformly spraying water mist, wherein the spraying amount is 85g/m2Drying the film by a hot air blower after flattening until the water content is 13 percent, and taking out the film for the subsequent film coating step; taking low-density polyethylene as a raw material, performing single-side film coating on base paper by using a film coating machine to obtain film coated paper, cooling the film coated paper, and rolling for later use, wherein the parameters of the film coating machine are extrusion temperature 300 ℃, die head temperature 325 ℃, melt temperature 330 ℃ and mirror roller cooling water temperature 13 ℃; preparing a silicone oil coating on the film-coated surface of the film-coated paper, repeating the steps (1) and (2) in the preparation method, and brushing the composite adhesive on the surface which is not coated with the film;
(4) and (3) carrying out double-roller extrusion composite bonding on the surface without the silicone oil coating on the silicone oil coating aluminum foil and the laminating paper, and directly conveying the bonded aluminum foil paper into a dryer to dry for 20min at 165 ℃.
The thickness of the composite adhesive layer is measured to be 5.8 mu m by adopting an electric vortex coating thickness meter, and the thickness of the laminating layer is 3.7 mu m.
Comparative example: aluminium foil paper for tobacco was prepared according to the method disclosed in chinese patent CN107190573A and used for subsequent performance tests as a control.
To test the performance of the invention, the following experiments were performed:
1. gloss test of silicone oil release liner paper
The glossiness is the degree of approaching the mirror surface of the object indicated by the number, and mainly depends on the illumination angle of the light source and the observation angle, and the instrument measurement usually adopts 20 degrees, 45 degrees, 60 degrees or 75 degrees of illumination and detection signals. The test method comprises the following steps of shearing a certain area of the silicone oil release liner paper prepared in the examples 1-3 and the aluminum foil paper prepared in the comparative example, and measuring the glossiness of the aluminum foil surface by using a Sheen60 type glossmeter, wherein the test angle is 60 degrees, and the refractive index is nDGlass surface gloss of =1.567 is defined as 100%.
The assay is shown in table 1:
TABLE 1 gloss measurement results of silicone oil release liner paper
| Group of | Gloss (%) |
| Example 1 | 87.3 |
| Example 2 | 82.4 |
| Example 3 | 85.3 |
| Comparative example | 65.2 |
The glossiness of the aluminum foil surface of the lining paper prepared in the embodiments 1-3 is obviously higher than that of the contrast embodiment, which shows that the defect that the aluminum foil is easy to scratch and dry in the compounding process is overcome by adopting the process of pre-coating the silicone oil coating on the surface of the aluminum foil, so that the surface of the lining paper after compound gluing is smooth, the glossiness is excellent, and the glossiness is obviously better than that of the common aluminum foil paper.
2. Adhesion testing of Silicone oil coatings
The test of the adhesive force of the coating refers to the GB9286-88 standard, the coating on the surface of the silicone oil release liner paper is subjected to lattice drawing to prepare samples, the number of the lattices is 5 multiplied by 5, and the side length of each lattice is 2 mm. The cutting is carried out manually, the force is uniformly applied, the cutting speed is about 50mm/s, and the cutting is stable and has no vibration. And after cutting, using a 3M adhesive tape to bond the surface of the coating after grid division, using the 3M adhesive tape to bond for 5 times, and grading and representing the adhesive force of the coating to the base paper by observing the number of the remaining coating grids on the surface of the aluminum foil paper, wherein the 0-grade adhesive force is the best, the 5-grade adhesive force is the worst, and the 0, 1 and 2 grades can meet the common application.
TABLE 2 measurement of curing adhesion rating of silicone oil coating
| Group of | |
|
| Example 1 | 1 | 0~1 |
| Example 2 | 0 | 0 |
| Example 3 | 0 | 0 |
| Comparative example | Is free of | Is free of |
Table 2 results show that the silicone oil coating of the present invention is firmly bonded to paper and aluminum foil, and is not easily separated and peeled off by external force although it is thin, which lays the foundation for stable moisture insulation.
3. Flexibility test of aluminum foil paper
In the experiment, the aluminum foil paper to be tested is wound on the cylinder, maintained for a period of time, and then unfolded to observe whether the coating surface is cracked or not to evaluate the flexibility. The specific method comprises the steps of winding a sample to be measured with the width of 60mm on three square cylinders with the side length of 16mm, 10mm and 5mm, unfolding the sample after 16 hours, and observing the flatness and the existence of cracking of the coating. The results are shown in Table 3:
TABLE 3 flexibility test results of silicone oil release liner paper
| Diameter of column | Example 1 | Example 2 | Example 3 | Comparative example |
| 16mm | Smooth surface without cracking | Smooth surface without cracking | Smooth surface without cracking | Smooth surface without cracking |
| 10mm | Smooth surface without cracking | Smooth surface without cracking | Smooth surface without cracking | The aluminum foil surface has fine cracks |
| 5mm | Smooth surface without cracking | Smooth surface without cracking | Smooth surface without cracking | The aluminum foil has uneven surface and cracks |
The results in Table 3 show that the silicon oil coating can obviously increase the flexibility of the aluminum foil, reduce the phenomenon that the aluminum foil is easy to break in use, and enable the compounded aluminum foil paper to have good flexibility.
4. Solvent resistance of silicone oil release liner paper
The solvent resistance of the silicone oil release liner paper sample prepared in example 3 was tested by a manual wiping method, i.e. absorbent cotton dipped with ketone was used to wipe the surface of the release paper sample to be tested with a suitable pressure for 30 times, and then the change of the coating surface was observed. The results are shown in Table 4:
TABLE 4
| Solvent(s) | Phenomenon(s) | Evaluation of |
| Water (W) | No shedding, no wrinkling, no bubbling, no discoloration, and no loss of gloss | Superior food |
| Toluene | No shedding, no wrinkling, no bubbling, no discoloration, and no loss of gloss | Superior food |
| Ethanol | No shedding, no wrinkling, no bubbling, no discoloration, and no loss of gloss | Superior food |
| Acetone (II) | No shedding, no wrinkling, no bubbling, no discoloration, and no loss of gloss | Superior food |
| Ethyl acetate | No shedding, no wrinkling, no bubbling, no discoloration, and no loss of gloss | Superior food |
| N, N-dimethylformamide | No shedding, no wrinkling, no bubbling, no discoloration, and no loss of gloss | Superior food |
The results in table 4 show that the silicone oil coating on the surface of the silicone oil release liner paper has good solvent resistance, and the surface of the coating is unchanged after the coating is repeatedly wiped for 30 times by water, ethyl acetate, N-dimethyl methylphthalamide, toluene, ethanol and acetone, which shows that the coating has good capability of resisting the corrosion of the solvent. After the silicone oil coating is irradiated by ultraviolet light, the curing degree is higher, a compact reticular structure is formed, and the silicone oil coating has excellent solvent-resistant isolation performance.
In conclusion, the silicone oil has good heat resistance, hydrophobicity and smaller surface tension, can enhance the brightness of paper when applied to the aluminum-foil paper, enables the surface to be smooth and soft, and can better prevent the loss and the intervention of water. The acrylate resin as a film forming agent can uniformly disperse and cover the silicone oil on the surface of paper or aluminum foil, so that the silicone oil coating is thin, tightly adhered and not easy to fall off, and the organic solvent and water resistance is enhanced; the aluminum foil is pre-cured with a silicone oil coating, so that the aluminum foil is smooth and soft, the conformability of the aluminum foil to paper is improved, the scratching and dryness caused by the subsequent extrusion compounding step are effectively prevented, and the aluminum foil paper is smooth and bright; the moisture-proof aluminum foil paper has the moisture-proof performance of release paper, has the bright appearance of aluminum foil paper, further improves the performance of blocking moisture from entering and exiting, and maintains the stable environment in cigarette packages. The paper drenches the leveling nature that the membrane was drenched to the retention certain water content after leveling before the membrane, for follow-up composite aluminum foil provides good roughness, reduces the phenomenon that the paper curls the rake in the time of compounding, drenches the membrane and the moisture of bonding stoving in-process at high temperature and volatilizes gradually, and the water content in the slip sheet is extremely low in the finished product, does not influence the moisture barrier of cigarette package. The base paper is coated with the silicone oil coating after being subjected to film spraying, so that the absorption of the base paper to the silicone oil can be effectively reduced, the oil consumption of the base paper is reduced, the material consumption of the raw material of the silicone oil coating is reduced, and the production cost is reduced. The silicone oil coating adopts an ultraviolet irradiation rapid curing process, so that the film forming time can be shortened, the film stability is increased, and the production efficiency is improved. The smoothness of silicone oil release liner paper can be obviously improved by gluing and compounding after silicone oil coatings are formed on the surfaces of raw material aluminum foils and base paper in advance, if aluminum foil paper is directly adopted to coat the silicone oil coatings, the aluminum foil on the surface is embrittled at high temperature of film coating, the gloss is reduced, the paper has the phenomena of corrugation upwarp and the like, and the packaging use is influenced.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical scheme according to the technical idea proposed by the present invention falls within the protection scope of the present invention; the technology not related to the invention can be realized by the prior art.
Claims (6)
1. The utility model provides a silicone oil is from type interior slip sheet which characterized in that: the aluminum foil paper comprises an aluminum foil, base paper, a composite adhesive layer and a silicone oil coating, wherein the aluminum foil is compounded and bonded on the base paper through the composite adhesive layer to form aluminum foil paper, the silicone oil coating is coated on the upper surface layer of the aluminum foil and the lower surface layer of the base paper, and a laminating layer is also coated between the base paper and the silicone oil coating;
the silicone oil release liner paper is prepared by the following specific steps:
(1) prefabricating a silicone oil coating liquid raw material: weighing an acrylic resin raw material, mixing and sealing the acrylic resin raw material, putting the acrylic resin raw material into a 65-75 ℃ oven, adding silicone oil after the viscosity is reduced, uniformly stirring, standing and removing bubbles to obtain an acrylic resin mixed solution; melting a photoinitiator at 45-55 ℃, dropwise adding the melted photoinitiator into the uniformly mixed acrylic resin mixed solution, adding absolute ethyl alcohol, fully stirring and mixing, and standing in an oven at 20-40 ℃ for 12-14 hours after uniform mixing to fully remove bubbles in the mixed solution;
(2) preparing a silicon oil coating aluminum foil: uniformly pouring a silicon oil coating liquid raw material on the upper surface of an aluminum foil along the width direction of the aluminum foil, coating a coating on the surface of the aluminum foil by using a film scraper by adopting a blade coating method, quickly conveying the coated aluminum foil to a pre-opened conveyor belt type ultraviolet curing machine for ultraviolet curing, slowly removing the aluminum foil from the other side of the ultraviolet curing machine, and finishing curing of the coating;
(3) taking polyethylene as a raw material, performing single-side film coating on raw paper by using a film coating machine to obtain film coated paper, and winding the film coated paper after cooling for later use; preparing a silicone oil coating on the film-coated surface of the film-coated paper, repeating the steps (1) and (2) in the preparation method, and brushing the composite adhesive on the surface which is not coated with the film;
(4) and (3) carrying out double-roller extrusion composite bonding on the lower surface of the silicon oil coating aluminum foil and the laminating paper, and directly conveying the bonded aluminum foil paper into a dryer to be dried for 15-25 min at the temperature of 150-180 ℃.
2. The silicone oil release liner paper according to claim 1, wherein: the thickness of the aluminum foil is 15-25 mu m, the thickness of the base paper is 40-60 mu m, the thickness of the composite adhesive layer is 4.2-7.5 mu m, and the thickness of the laminating layer is 2.2-5.3 mu m.
3. The silicone oil release liner paper according to claim 1, wherein: the silicone oil coating is prepared from absolute ethyl alcohol, acrylate resin, silicone oil and a photoinitiator, wherein the absolute ethyl alcohol: acrylate resin: silicone oil: the weight ratio of the photoinitiator is 1:4:5: 1; the laminating layer is formed by laminating low-density polyethylene on one side of base paper.
4. A silicone oil release liner paper according to claim 3, wherein: the acrylate resin is prepared from the following raw materials in parts by weight: 20-45 parts of acrylic ester 996, 14-28 parts of acrylic ester 983, 1-10 parts of 2 (2-ethoxyethoxy) ethyl acrylate, 5-15 parts of tripropylene glycol diacrylate and 10-20 parts of trimethylolpropane triacrylate; the silicone oil is composed of one or more of methyl silicone oil, benzyl silicone oil, acrylate modified organic silicon, methyl hydrogen-containing silicone oil and hydroxyl silicone oil; the specific gravity of the low-density polyethylene is 0.912-0.921 g/cm3。
5. The silicone oil release liner paper according to claim 1, wherein: the step (3) further comprises the following raw paper pretreatment: blowing off dust and impurities on the surface of the base paper by using a fan, and uniformly spraying water mist, wherein the spraying amount is 70-100 g/m2And after flattening, drying by a hot air blower until the water content is 10-15%, and taking out for the subsequent film spraying step.
6. The silicone oil release liner paper according to claim 1, wherein: the parameters of the film coating machine are that the extrusion temperature is 280-320 ℃, the die head temperature is 320-330 ℃, the melt temperature is 320-340 ℃, and the cooling water temperature of the mirror roller is 10-15 ℃.
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| CN113403876A (en) * | 2021-06-29 | 2021-09-17 | 浙江天之元物流科技有限公司 | Precise silicon coating process on release paper |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597874A (en) * | 2009-06-24 | 2009-12-09 | 朱锦佐 | A kind of manufacture craft of embossing laminating release paper |
| CN201679177U (en) * | 2010-01-21 | 2010-12-22 | 珠海东诚光固化材料有限公司 | UV cured transfer film metal decorative board |
| CN203188063U (en) * | 2013-01-09 | 2013-09-11 | 芜湖卷烟材料厂 | Cigarette-packing composite aluminum foil paper |
| CN105178107A (en) * | 2015-09-21 | 2015-12-23 | 滁州卷烟材料厂 | Cigarette aluminum-foil paper with anti-counterfeiting label |
-
2019
- 2019-05-30 CN CN201910465211.5A patent/CN110293733B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597874A (en) * | 2009-06-24 | 2009-12-09 | 朱锦佐 | A kind of manufacture craft of embossing laminating release paper |
| CN201679177U (en) * | 2010-01-21 | 2010-12-22 | 珠海东诚光固化材料有限公司 | UV cured transfer film metal decorative board |
| CN203188063U (en) * | 2013-01-09 | 2013-09-11 | 芜湖卷烟材料厂 | Cigarette-packing composite aluminum foil paper |
| CN105178107A (en) * | 2015-09-21 | 2015-12-23 | 滁州卷烟材料厂 | Cigarette aluminum-foil paper with anti-counterfeiting label |
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