CN110589230A - High-temperature-resistant aluminum foil easy to tear and cover - Google Patents
High-temperature-resistant aluminum foil easy to tear and cover Download PDFInfo
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- CN110589230A CN110589230A CN201910830604.1A CN201910830604A CN110589230A CN 110589230 A CN110589230 A CN 110589230A CN 201910830604 A CN201910830604 A CN 201910830604A CN 110589230 A CN110589230 A CN 110589230A
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- aluminum foil
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- tear
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/10—Container closures formed after filling
- B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
- B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
-
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a high-temperature-resistant aluminum foil with an easily-torn cover, and relates to the technical field of packaging materials. The utility model provides a high temperature resistant easily tears lid aluminium foil, includes the aluminium foil, sets up at the protective layer of aluminium foil upside, sets up the heat-seal layer in the downside, and the thickness that the thickness on heat-seal layer was is 0.12-0.22mm, and there is vertically and horizontally staggered mar on aluminium foil upside, the volume of following surface, and the heat-seal layer is formed by the coating of heat-seal liquid, and the heat-seal liquid includes following component: water-based acrylic resin, epoxy resin and polyvinyl acetal. The high-temperature-resistant easy-to-tear aluminum foil has good sealing performance, the heat sealing layer is not easy to peel off from the aluminum foil, the materials in the can are not adhered when the aluminum foil is opened, and the heat sealing layer cannot be peeled off when the aluminum foil is used at a higher temperature, so that the sealing performance is still maintained.
Description
Technical Field
The invention relates to the technical field of packaging materials, in particular to a high-temperature-resistant aluminum foil with an easily-torn cover.
Background
Because the aluminum has soft texture, good ductility and silvery white luster, if the rolled sheet is pasted on offset paper by sodium silicate and other substances, an aluminum foil sheet is made. Aluminum foil is widely used for foods, beverages, cigarettes, medicines, photographic plates, household goods, etc. because of its excellent characteristics, and is generally used as a packaging material thereof; an electrolytic capacitor material; heat insulating materials for buildings, vehicles, ships, houses, and the like; it can also be used as decorative metallic lines, wallpaper, various stationery printed matters, and decorating trademarks of light industry products. Among the above uses, the most effective use of aluminum foil is as a packaging material. The aluminum foil is a soft metal film, and has the advantages of moisture resistance, air tightness, shading, abrasion resistance, fragrance retention, no toxicity, no odor and the like, after the aluminum foil is compounded with the plastic and the paper, the shielding performance of the aluminum foil, the strength of the paper and the heat sealing performance of the plastic are integrated, the shielding performance of the aluminum foil on water vapor, air, ultraviolet rays, bacteria and the like required by a packaging material is further improved, and the application market of the aluminum foil is greatly widened. The packed articles are completely isolated from outside light, moisture, gas and the like, so that the packed articles are well protected. Especially for the package of the steamed food, the material using the composite aluminum foil can ensure that the food does not deteriorate for more than one year. Moreover, the heating and unpacking are convenient, and are popular with consumers.
Aluminum foils have also been used in canned products to make easily tearable lids for packaging milk powder, cans, etc. or some other liquid, and have been made in more specific shapes and sealed by heat sealing glue. Among the prior art, when tearing the lid that easily tears lid aluminium foil and make, the face of liquid contact in the jar, heat-seal layer can glue the material in a lot of jars, like thick liquid or oily material in the jar, cause the waste. In addition, the heat-sealing glue has weak high-temperature resistance, and can be tilted at a higher temperature to damage the sealing property.
Disclosure of Invention
In view of the above, the invention provides a high temperature resistant easy-to-tear aluminum foil, which is not easy to tear when applied to sealing, and does not cause the phenomenon of adhering substances in a tank, and the heat-sealing glue does not warp at a higher temperature.
The invention relates to a high-temperature-resistant easy-to-tear aluminum foil, which comprises an aluminum foil, a protective layer arranged on the upper side of the aluminum foil and a heat sealing layer arranged on the lower side of the aluminum foil, wherein the thickness of the heat sealing layer is 0.012-0.022mm, criss-cross scratches are formed on the upper side and the lower side of the aluminum foil, the scratches are thin enough to prevent the appearance from being influenced, and the width of each scratch is 0.03-0.06 mm. The scratches are arranged to improve the adhesiveness of the aluminum foil when the solutions corresponding to the protective layer and the heat seal layer are applied, the protective layer and the heat seal layer can have stronger adhesive capacity with the aluminum foil after the liquids used as the protective layer and the heat seal layer are cured after being sprayed, the protective layer and the heat seal layer are not easy to separate from the aluminum foil, and the heat seal layer and the aluminum foil cannot be peeled off when the aluminum foil is opened. The heat sealing layer is formed by coating heat sealing liquid, and the heat sealing liquid comprises the following components: waterborne acrylic resin, epoxy resin, polyvinyl acetal, fluorine-containing silicon acrylic acid, melamine formaldehyde resin, filler and curing agent.
Wherein, the filler can be one or two of wood flour, bean flour and bentonite, for example, the filler can be bentonite, the thickness of the heat sealing layer is very thin, the particle size of the substances added in the heat sealing liquid is very small, and in addition, the bentonite can also be added to enhance the leveling capability of the heat sealing liquid. The addition of wood powder, bean flour and bentonite can weaken the stress concentration caused by the volume shrinkage of the glue layer, thereby causing the phenomenon of glue opening and falling off of the heat sealing layer.
The polyvinyl acetal and the melamine formaldehyde resin are added, and the hydrophobic groups are introduced, so that the hydrophobicity can be well improved, and the adhesion between the heat sealing layer and liquid is avoided when the liquid substance is preserved. The fluorine-containing silicon acrylic acid serving as an auxiliary agent can change the original hydrophobicity, oleophobicity and oxidation resistance and improve the oleophobicity of the heat seal layer.
The epoxy resin is a generic name of a polymer having two or more epoxy groups in a molecule. It is a polycondensation product of epichlorohydrin and bisphenol A or a polyol. Because of the chemical activity of the epoxy group, the epoxy group can be opened by a plurality of compounds containing active hydrogen, and the epoxy group is cured and crosslinked to form a network structure, so that the epoxy group is a thermosetting resin. The epoxy resin has good high-temperature resistance, and can improve the high-temperature resistance of the heat-sealing layer when being mixed with other additives.
The curing agent may be one or both of titanium tetraisopropoxide and a hydroxy acrylic resin.
In addition, the heat sealing liquid comprises the following components in parts by weight: 30-49 parts of water-based acrylic resin, 10-22 parts of epoxy resin, 6-8 parts of polyvinyl acetal, 2-4 parts of melamine formaldehyde resin, 2-4 parts of fluorine-containing silicon acrylic acid, 4-7 parts of filler and 0.5-0.8 part of curing agent.
Preferably, the heat sealing liquid comprises the following components in parts by weight: 44 parts of water-based acrylic resin, 12 parts of epoxy resin, 7 parts of polyvinyl acetal, 3 parts of melamine formaldehyde resin, 3 parts of fluorine-containing silicon acrylic acid, 5 parts of filler and 0.6 part of curing agent.
The protective layer can be applied by means of metal painting and decoration, which are common in the prior art, and the protective layer is obtained after curing.
The high-temperature-resistant easy-to-tear aluminum foil has good sealing performance, the heat sealing layer is not easy to peel off from the aluminum foil, the materials in the can are not adhered when the aluminum foil is opened, and the heat sealing layer cannot be peeled off when the aluminum foil is used at a higher temperature, so that the sealing performance is still maintained.
Drawings
Fig. 1 is a schematic structural diagram of an aluminum foil of a high-temperature-resistant easy-to-tear cover according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
Example 1
Referring to fig. 1, the high temperature resistant easy-to-tear aluminum foil comprises an aluminum foil, a protective layer arranged on the upper side of the aluminum foil, and a heat sealing layer arranged on the lower side of the aluminum foil, wherein the thickness of the heat sealing layer is 0.012mm, the upper side and the lower side of the aluminum foil are provided with criss-cross scratches, the scratches are sufficiently thin to prevent the appearance from being affected, and the width of the scratches is 0.03 mm. The heat sealing layer is formed by coating heat sealing liquid, and the heat sealing liquid comprises the following components: waterborne acrylic resin, epoxy resin, polyvinyl acetal, fluorine-containing silicon acrylic acid, melamine formaldehyde resin, filler and curing agent.
Wherein, the filler can be one or two of wood flour, bean flour and bentonite, and the filler in the embodiment is bentonite.
The polyvinyl acetal and the melamine formaldehyde resin are added, and the hydrophobic groups are introduced, so that the hydrophobicity can be well improved, and the adhesion between the heat sealing layer and liquid is avoided when the liquid substance is preserved. The fluorine-containing silicon acrylic acid serving as an auxiliary agent can change the original hydrophobicity, oleophobicity and oxidation resistance and improve the oleophobicity of the heat seal layer.
The curing agent may be one or two of titanium tetraisopropoxide and a hydroxy acrylic resin, and in this embodiment, the curing agent is a hydroxy acrylic resin.
In addition, the heat sealing liquid comprises the following components in parts by weight: 30 parts of water-based acrylic resin, 10 parts of epoxy resin, 6 parts of polyvinyl acetal, 2 parts of melamine formaldehyde resin, 2 parts of fluorine-containing silicon acrylic acid, 4 parts of filler and 0.5 part of curing agent.
Example 2
The utility model provides a high temperature resistant easily tears lid aluminium foil, is in including aluminium foil, setting the protective layer, the setting of aluminium foil upside are in the heat-seal layer of downside, the thickness that the thickness on heat-seal layer is 0.022mm, there is vertically and horizontally staggered's mar on aluminium foil upside, the lower volume surface, and the mar is enough thin, prevents to influence beautifully, the width of mar is 0.06 mm. The heat sealing layer is formed by coating heat sealing liquid, and the heat sealing liquid comprises the following components: waterborne acrylic resin, epoxy resin, polyvinyl acetal, fluorine-containing silicon acrylic acid, melamine formaldehyde resin, filler and curing agent.
The heat sealing liquid comprises the following components in parts by weight: 49 parts of water-based acrylic resin, 22 parts of epoxy resin, 8 parts of polyvinyl acetal, 4 parts of melamine formaldehyde resin, 4 parts of fluorine-containing silicon acrylic acid, 7 parts of wood powder and 0.8 part of titanium tetraisopropoxide.
Example 3
The utility model provides a high temperature resistant easily tears lid aluminium foil, is in including aluminium foil, setting the protective layer, the setting of aluminium foil upside are in the heat-seal layer of downside, the thickness that the thickness on heat-seal layer was 0.015mm, there is vertically and horizontally staggered's mar on aluminium foil upside, the volume of leaving, the mar is enough thin, prevents to influence beautifully, the width of mar is 0.04 mm. The heat sealing layer is formed by coating heat sealing liquid, and the heat sealing liquid comprises the following components: waterborne acrylic resin, epoxy resin, polyvinyl acetal, fluorine-containing silicon acrylic acid, melamine formaldehyde resin, filler and curing agent.
The heat sealing liquid comprises the following components in parts by weight: 44 parts of water-based acrylic resin, 12 parts of epoxy resin, 7 parts of polyvinyl acetal, 3 parts of melamine formaldehyde resin, 3 parts of fluorine-containing silicon acrylic acid, 5 parts of bean flour and 0.6 part of titanium tetraisopropoxide.
Example 4
The utility model provides a high temperature resistant easily tears lid aluminium foil, is in including aluminium foil, setting the protective layer, the setting of aluminium foil upside are in the heat-seal layer of downside, the thickness that the thickness on heat-seal layer was 0.015mm, there is vertically and horizontally staggered's mar on aluminium foil upside, the volume of leaving, the mar is enough thin, prevents to influence beautifully, the width of mar is 0.05 mm. The heat sealing layer is formed by coating heat sealing liquid, and the heat sealing liquid comprises the following components: waterborne acrylic resin, epoxy resin, polyvinyl acetal, fluorine-containing silicon acrylic acid, melamine formaldehyde resin, filler and curing agent.
The heat sealing liquid comprises the following components in parts by weight: 40 parts of water-based acrylic resin, 11 parts of epoxy resin, 7.5 parts of polyvinyl acetal, 3 parts of melamine formaldehyde resin, 3 parts of fluorine-containing silicon acrylic acid, 5 parts of bentonite and 0.6 part of hydroxy acrylic resin.
After the antibacterial transparent easy-to-tear film in the embodiments 1 to 4 is adhered to the tinplate, the opening force test is performed, 5 samples in each group are measured and averaged, a TSL-1002 electronic tensile tester is used for the test, and the test results in each group are as follows:
the high-temperature-resistant easy-to-tear aluminum foil has good sealing performance, the heat sealing layer is not easy to peel off from the aluminum foil, the materials in the can are not adhered when the aluminum foil is opened, and the heat sealing layer cannot be peeled off when the aluminum foil is used at a higher temperature, so that the sealing performance is still maintained.
The present invention is not limited to the above-described specific embodiments, and various modifications and variations are possible. Any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides a high temperature resistant easily tears lid aluminium foil, its characterized in that includes the aluminium foil, sets up protective layer, the setting of aluminium foil upside are in the heat-seal layer of aluminium foil downside, the thickness that the thickness on heat-seal layer was is 0.012-0.022mm, there is vertically and horizontally staggered's mar on aluminium foil upside, the lower volume surface, the heat-seal layer is formed by the coating of heat-seal liquid, the heat-seal liquid includes following component: water-based acrylic resin, epoxy resin and polyvinyl acetal.
2. The aluminum foil for a high temperature resistant easy-to-tear cover as claimed in claim 1, wherein the width of the scratch is 0.03-0.06 mm.
3. The high-temperature-resistant easy-to-tear aluminum foil is characterized in that the heat sealing liquid further comprises fluorine-containing silicon acrylic acid, melamine formaldehyde resin, a filler and a curing agent.
4. The aluminum foil with the high-temperature-resistant easy-to-tear cover as claimed in claim 3, wherein the filler is one or two of wood powder, bean powder and bentonite.
5. The aluminum foil with the high-temperature-resistant easy-to-tear cover as claimed in claim 4, wherein the filler is bentonite.
6. The high-temperature-resistant easy-to-tear aluminum foil as claimed in claim 4 or 5, wherein the heat sealing liquid comprises the following components in parts by weight: 30-49 parts of water-based acrylic resin, 10-22 parts of epoxy resin, 6-8 parts of polyvinyl acetal, 2-4 parts of melamine formaldehyde resin, 2-4 parts of fluorine-containing silicon acrylic acid, 4-7 parts of filler and 0.5-0.8 part of curing agent.
7. The high-temperature-resistant easy-to-tear aluminum foil is characterized in that the heat sealing liquid comprises the following components in parts by weight: 44 parts of water-based acrylic resin, 12 parts of epoxy resin, 7 parts of polyvinyl acetal, 3 parts of melamine formaldehyde resin, 3 parts of fluorine-containing silicon acrylic acid, 5 parts of filler and 0.6 part of curing agent.
8. The aluminum foil with the high-temperature-resistant easy-to-tear cover as claimed in claim 7, wherein the curing agent is one or two of titanium tetraisopropoxide and hydroxyl acrylic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910830604.1A CN110589230A (en) | 2019-09-04 | 2019-09-04 | High-temperature-resistant aluminum foil easy to tear and cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910830604.1A CN110589230A (en) | 2019-09-04 | 2019-09-04 | High-temperature-resistant aluminum foil easy to tear and cover |
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| Publication Number | Publication Date |
|---|---|
| CN110589230A true CN110589230A (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910830604.1A Pending CN110589230A (en) | 2019-09-04 | 2019-09-04 | High-temperature-resistant aluminum foil easy to tear and cover |
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| Country | Link |
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| CN (1) | CN110589230A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114801401A (en) * | 2022-03-23 | 2022-07-29 | 毕玛时软包装（苏州）有限公司 | Clean easy-to-open cover film for liquid packaging |
| CN114854266A (en) * | 2022-03-23 | 2022-08-05 | 毕玛时软包装（苏州）有限公司 | Breathable easy-to-tear heat-sealing adhesive capable of being thermally sealed on various substrates |
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| CN103450778A (en) * | 2013-08-20 | 2013-12-18 | 广东新供销天保再生资源发展有限公司 | Waterborne OP protective agent for PTP aluminum foils for foods and drugs and preparation method thereof |
| CN103992720A (en) * | 2014-04-23 | 2014-08-20 | 江苏欣安新材料技术有限公司 | Special coating for acrylic finishes, and making method thereof |
| CN105459539A (en) * | 2015-12-09 | 2016-04-06 | 湖州金洁实业有限公司 | Aluminum foil of easily torn cover |
| CN106003963A (en) * | 2016-07-11 | 2016-10-12 | 浙江金石包装有限公司 | Milk-proof heat sealing film and preparation method thereof |
| CN206749178U (en) * | 2017-03-02 | 2017-12-15 | 浙江博升新材料有限公司 | A kind of Easy tearing lid of resistance to boiling |
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2019
- 2019-09-04 CN CN201910830604.1A patent/CN110589230A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103450778A (en) * | 2013-08-20 | 2013-12-18 | 广东新供销天保再生资源发展有限公司 | Waterborne OP protective agent for PTP aluminum foils for foods and drugs and preparation method thereof |
| CN103992720A (en) * | 2014-04-23 | 2014-08-20 | 江苏欣安新材料技术有限公司 | Special coating for acrylic finishes, and making method thereof |
| CN105459539A (en) * | 2015-12-09 | 2016-04-06 | 湖州金洁实业有限公司 | Aluminum foil of easily torn cover |
| CN106003963A (en) * | 2016-07-11 | 2016-10-12 | 浙江金石包装有限公司 | Milk-proof heat sealing film and preparation method thereof |
| CN206749178U (en) * | 2017-03-02 | 2017-12-15 | 浙江博升新材料有限公司 | A kind of Easy tearing lid of resistance to boiling |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114801401A (en) * | 2022-03-23 | 2022-07-29 | 毕玛时软包装（苏州）有限公司 | Clean easy-to-open cover film for liquid packaging |
| CN114854266A (en) * | 2022-03-23 | 2022-08-05 | 毕玛时软包装（苏州）有限公司 | Breathable easy-to-tear heat-sealing adhesive capable of being thermally sealed on various substrates |
| CN114854266B (en) * | 2022-03-23 | 2023-02-10 | 毕玛时软包装（苏州）有限公司 | Breathable easy-to-tear heat-sealing adhesive capable of being thermally sealed on various substrates |
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Application publication date: 20191220 |