CN115418178A - Heat-sealing film and preparation method and application thereof - Google Patents
Heat-sealing film and preparation method and application thereof Download PDFInfo
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- CN115418178A CN115418178A CN202211189617.3A CN202211189617A CN115418178A CN 115418178 A CN115418178 A CN 115418178A CN 202211189617 A CN202211189617 A CN 202211189617A CN 115418178 A CN115418178 A CN 115418178A
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of 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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J101/00—Adhesives based on cellulose, modified cellulose, or cellulose derivatives
- C09J101/02—Cellulose; Modified cellulose
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/35—Heat-activated
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/10—Presence of inorganic materials
- C09J2400/16—Metal
- C09J2400/163—Metal in the substrate
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/20—Presence of organic materials
- C09J2400/26—Presence of textile or fabric
- C09J2400/263—Presence of textile or fabric in the substrate
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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- Manufacturing & Machinery (AREA)
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- Polymers & Plastics (AREA)
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Abstract
The invention discloses a heat sealing film and a preparation method and application thereof. The heat sealing film comprises the following structures: an anti-sticking layer; the plastic sealing protective layer is arranged on the lower surface of the anti-sticking layer; the adhesive layer is arranged on the lower surface of the plastic sealing protective layer; a metal stabilizing layer provided on a lower surface of the adhesive layer; a thermal adhesive layer provided on a lower surface of the metal stabilizer layer; the plastic sealing protective layer comprises a fiber woven mesh. The heat sealing film has good longitudinal tensile strength and transverse tensile strength, good mechanical property, low protein adsorbability, low magnetic bead adsorbability, environmental protection, no pollution, easy degradation, and common acid-base biological reagent resistance and common organic solvent resistance.
Description
Technical Field
The invention relates to the technical field of heat-sealing films, in particular to a heat-sealing film and a preparation method and application thereof.
Background
With the national vigorous supervision of food and drug industries, the supervision in the field of drug packaging is also strengthened, so that the packaging material not only needs to be safe and environment-friendly, but also needs to realize high performance, high efficiency and low cost. The heat-sealing bag is generally applied to the fields of daily chemical product packaging, food and medicine packaging and the like. Because the leakage appears most easily in the wrapping bag heat-seal department when the product is filled, and the damage of wrapping bag also takes place in the heat-seal part when in actual use moreover, consequently, select suitable heat-seal film and heat-seal parameter can reduce the rejection rate of production line to can effectively improve the holistic separation performance of packing material.
The heat-sealing material adopted by domestic heat-sealing films has the defects of high manufacturing cost, large proportion of plastic materials and no degradation for a long time. In addition, with the higher and higher requirements of the market on the performance of the heat-sealing film, the mechanical performance of the existing heat-sealing film is slightly insufficient.
Based on this, a new heat-sealing film is urgently needed to solve the above problems.
Disclosure of Invention
The first technical problem to be solved by the invention is as follows:
a heat-sealable film is provided.
The second technical problem to be solved by the invention is:
a preparation method of the heat sealing film is provided.
The third technical problem to be solved by the invention is:
the application of the heat sealing film.
In order to solve the first technical problem, the invention adopts the technical scheme that:
a heat-sealable film comprising the structure:
an anti-sticking layer;
the plastic sealing protective layer is arranged on the lower surface of the anti-sticking layer;
the bonding layer is arranged on the lower surface of the plastic sealing protective layer;
the metal stabilizing layer is arranged on the lower surface of the bonding layer;
the thermal bonding layer is arranged on the lower surface of the metal stabilizing layer;
the plastic sealing protective layer comprises a fiber woven mesh.
According to the embodiment of the invention, one of the technical schemes has at least one of the following advantages or beneficial effects:
1. the anti-sticking layer provides anti-sticking performance on one hand, and also protects the heat-sealing film on the other hand, so that the safety of the film is improved.
2. The heat-sealing film is supported by additionally arranging a fiber woven net in the plastic-sealing protective layer; the bonding layer is arranged on the surface of the fiber woven mesh, so that the metal stabilizing layer can be firmly adsorbed on the metal stabilizing layer, the mechanical strength of the whole structure of the heat sealing film is ensured, and the tensile strength of the heat sealing film in the transverse direction and the longitudinal direction can be greatly improved.
3. The heat sealing film has good longitudinal tensile strength and transverse tensile strength, good mechanical property, low protein adsorbability, low magnetic bead adsorbability, environmental protection, no pollution, easy degradation, and common acid-base biological reagent resistance and common organic solvent resistance.
According to one embodiment of the invention, the raw material of the release layer comprises the following components: at least one of polyethylene terephthalate, polybutylene terephthalate-adipate, and polylactic acid. Preferably, the raw materials of the anti-sticking layer comprise polybutylene terephthalate-adipate and polylactic acid. Polylactic acid has excellent mechanical strength, full degradability and biocompatibility, but has poor toughness and larger brittleness, and is easy to wrinkle in the process of preparing a heat-sealing film when being used as a raw material of the heat-sealing film. The polybutylene terephthalate-adipate also has full degradability and better toughness, but is not easy to form a film in the process of preparing a heat sealing film when being used as a raw material of the heat sealing film, and is easy to deform due to stretching in the stretching process. Based on the preparation method, the polybutylene terephthalate-adipate and the polylactic acid are mixed to be used as the anti-sticking layer, and the anti-sticking layer which is good in toughness, easy to form a film and difficult to deform can be prepared through mutual cooperation.
According to an embodiment of the invention, the adhesive layer comprises at least one of a polyurethane layer, an epoxy layer, a urethane acrylate layer.
According to one embodiment of the invention, the metal stabilization layer comprises at least one of an aluminum foil layer and a copper foil layer.
According to one embodiment of the present invention, the raw material of the thermal adhesive layer comprises the following components: at least one of microfibrillated cellulose, polyethylene and polypropylene. The heat-sealing film obtained by co-extrusion has high tensile strength and can also have low heat-sealing temperature, but the polyethylene and the polypropylene are easy to intertwine with each other, so that the heat-sealing strength is reduced, and the peel force of a heat-sealing interface is reduced. Based on this, the addition of microfibrillated cellulose to the thermal adhesive layer can solve the above-mentioned problems. The hydrogen bonds in the microfibrillated cellulose can form a network structure in the thermal bonding layer, have certain interception and blocking effects on polyethylene and polypropylene between heat sealing interfaces, block migration movement of the polyethylene and the polypropylene to the heat sealing interfaces during heat sealing, and avoid excessive mutual entanglement, so that the reduction of heat sealing strength and peeling force is avoided.
According to an embodiment of the present invention, the fiber woven mesh comprises at least one of a polyamide fiber woven mesh and a nylon woven mesh.
According to one embodiment of the invention, the release layer has a thickness of 1 μm to 2 μm.
According to one embodiment of the invention, the metal stabilization layer has a thickness of 30 to 50 μm.
In order to solve the second technical problem, the invention adopts the technical scheme that:
a method for producing the heat-sealable film, comprising the steps of:
and putting the raw materials into different charging pots, sequentially extruding the raw materials to the surface of the metal stable layer, and cooling to obtain the heat sealing film.
In another aspect, the invention also relates to the application of the heat sealing film in the packaging field. Comprising a heat-sealable film as described in the embodiment of aspect 1 above. Since this application adopts all the technical solutions of the heat-sealing film of the above embodiments, it has at least all the advantages brought by the technical solutions of the above embodiments.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of the structure of a heat-sealable film of example 1.
Reference numerals:
100-an anti-sticking layer, 200-a plastic sealing protective layer, 300-a bonding layer, 400-a metal stabilizing layer and 500-a thermal bonding layer.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, if there are first, second, etc. described, it is only for the purpose of distinguishing technical features, and it is not understood that relative importance is indicated or implied or the number of indicated technical features is implicitly indicated or the precedence of the indicated technical features is implicitly indicated.
In the description of the present invention, it should be understood that the orientation descriptions, such as the orientation or positional relationship indicated by upper, lower, etc., are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly defined, terms such as arrangement, installation, connection and the like should be broadly understood, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.
Example 1
A heat-sealable film comprising the structure:
an anti-sticking layer 100;
a plastic sealing protective layer 200, wherein the plastic sealing protective layer 200 is arranged on the lower surface of the anti-sticking layer 100;
an adhesive layer 300, wherein the adhesive layer 300 is arranged on the lower surface of the plastic sealing protective layer 200;
a metal stabilizer layer 400, the metal stabilizer layer 400 being provided on a lower surface of the adhesive layer 300;
a thermal adhesive layer 500, the thermal adhesive layer 500 being provided on the lower surface of the metal stabilizer layer 400;
the plastic sealing protective layer 200 comprises a fiber woven mesh.
Wherein, the thickness of the anti-sticking layer 100 is 1 μm;
wherein, the thickness of the plastic sealing protective layer 200 is 2 μm;
wherein the thickness of the adhesive layer 300 is 4 μm;
wherein the metal stabilization layer 400 has a thickness of 40 μm;
the thermal adhesive layer 500 had a thickness of 5 μm.
The anti-sticking layer 100 comprises the following raw materials: 10 parts by weight of polybutylene terephthalate-adipate and 4 parts by weight of polylactic acid;
wherein the plastic sealing protective layer 200 is a nylon woven net;
wherein, the raw materials of the bonding layer 300 comprise the following components: 15 parts by weight of epoxy resin E51,5 parts by weight of polyetheramine curing agent 5010B;
wherein the metal stabilizing layer 400 is an aluminum foil;
wherein, the raw materials of the thermal bonding layer 500 include the following components: 15 parts by weight of microfibrillated cellulose (Stroan), 10 parts by weight of polyethylene, 10 parts by weight of polypropylene.
The preparation of the heat sealing film comprises the following steps:
s1, adding the raw materials of the anti-sticking layer 100, the bonding layer 300 and the thermal bonding layer 500 into different charging pots for mixing, and sequentially extruding the raw materials onto an aluminum foil through a double-screw extruder, wherein a nylon woven mesh needs to be laid between the bonding layer 300 and the anti-sticking layer 100. Extruder temperature: 230 ℃ to 230 ℃.
After S2 is cooled to room temperature, the sheet is first longitudinally stretched at 100 ℃ at a stretch ratio of 490%, and then transversely stretched at 160 ℃ at a stretch ratio of 900%.
And S3, winding by using a winding machine to obtain the heat-sealing film.
The schematic view of the structure of the heat-sealable film of example 1 is shown in FIG. 1.
Example 2
Example 2 differs from example 1 in that: the metal stabilization layer 400 of example 2 is a copper foil layer.
Specifically, the method comprises the following steps:
a heat-sealable film comprising the structure:
an anti-sticking layer 100;
a plastic sealing protective layer 200, wherein the plastic sealing protective layer 200 is arranged on the lower surface of the anti-sticking layer 100;
an adhesive layer 300, wherein the adhesive layer 300 is arranged on the lower surface of the plastic sealing protective layer 200;
a metal stabilizer layer 400, the metal stabilizer layer 400 being provided on a lower surface of the adhesive layer 300;
a thermal adhesive layer 500, the thermal adhesive layer 500 being provided on the lower surface of the metal stabilizer layer 400;
the plastic sealing protective layer 200 comprises a fiber woven mesh.
Wherein, the thickness of the anti-sticking layer 100 is 1 μm;
wherein, the thickness of the plastic sealing protective layer 200 is 2 μm;
wherein the thickness of the adhesive layer 300 is 4 μm;
wherein the metal stabilization layer 400 has a thickness of 40 μm;
the thermal adhesive layer 500 had a thickness of 5 μm.
The anti-sticking layer 100 comprises the following raw materials: 10 parts by weight of polybutylene terephthalate-adipate and 4 parts by weight of polylactic acid;
wherein the plastic sealing protective layer 200 is a nylon woven net;
wherein, the raw materials of the bonding layer 300 comprise the following components: 15 parts by weight of epoxy resin E51,5 parts by weight of polyetheramine curing agent 5010B;
wherein the metal stabilizing layer 400 is a copper foil;
wherein, the raw materials of the thermal bonding layer 500 include the following components: 15 parts by weight of microfibrillated cellulose (Stroan), 10 parts by weight of polyethylene, 10 parts by weight of polypropylene.
The preparation method of the heat-sealing film comprises the following steps:
s1, adding the raw materials of the anti-sticking layer 100, the bonding layer 300 and the thermal bonding layer 500 into different charging pots for mixing, and sequentially extruding the raw materials onto an aluminum foil through a double-screw extruder, wherein a nylon woven mesh needs to be laid between the bonding layer 300 and the anti-sticking layer 100. Extruder temperature: 230 ℃ of oxygen.
After S2 is cooled to room temperature, the sheet is first longitudinally stretched at 100 ℃ at a stretch ratio of 490%, and then transversely stretched at 160 ℃ at a stretch ratio of 900%.
And S3, winding by using a winding machine to obtain the heat-sealing film.
Comparative example
The comparative example differs from example 1 in that: the comparative example did not have the encapsulating protective layer 200.
Specifically, the method comprises the following steps:
a heat-sealable film comprising the structure:
an anti-sticking layer 100;
an adhesive layer 300, the adhesive layer 300 being provided on the lower surface of the release layer 100;
a metal stabilizer layer 400, the metal stabilizer layer 400 being provided on a lower surface of the adhesive layer 300;
a thermal adhesive layer 500, the thermal adhesive layer 500 being provided on the lower surface of the metal stabilizer layer 400;
the plastic sealing protective layer 200 comprises a fiber woven mesh.
Wherein, the thickness of the anti-sticking layer 100 is 1 μm;
wherein the thickness of the adhesive layer 300 is 4 μm;
wherein the metal stabilization layer 400 has a thickness of 40 μm;
the thermal adhesive layer 500 had a thickness of 5 μm.
Wherein, the raw materials of the anti-sticking layer 100 comprise the following components: 10 parts by weight of polybutylene terephthalate-adipate and 4 parts by weight of polylactic acid;
wherein, the raw materials of the bonding layer 300 comprise the following components: 15 parts by weight of epoxy resin E51,5 parts by weight of polyetheramine curing agent 5010B;
wherein the metal stabilizing layer 400 is a copper foil;
wherein, the raw material of the thermal bonding layer 500 comprises the following components: 15 parts by weight of microfibrillated cellulose (Stroan), 10 parts by weight of polyethylene, 10 parts by weight of polypropylene.
The preparation of the heat sealing film comprises the following steps:
s1, putting raw materials of the anti-sticking layer 100, the bonding layer 300 and the thermal bonding layer 500 into different charging pots for mixing, and sequentially extruding the raw materials onto an aluminum foil through a double-screw extruder. Extruder temperature: 230 ℃ to 230 ℃.
After S2 is cooled to room temperature, the sheet is first longitudinally stretched at 100 ℃ at a stretch ratio of 490%, and then transversely stretched at 160 ℃ at a stretch ratio of 900%.
And S3, winding by using a winding machine to obtain the heat-sealing film.
And (3) performance testing:
the heat-sealable films prepared in examples 1-2 and comparative examples were subjected to the following tests, the results of which are shown in Table 1.
TABLE 1
The above description is only an example of the present invention and is not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention as described in the specification of the present invention or directly or indirectly applied to the related technical fields are included in the scope of the present invention.
Claims (10)
1. A heat-sealable film characterized by: the structure comprises the following structures:
an anti-sticking layer;
the plastic sealing protective layer is arranged on the lower surface of the anti-sticking layer;
the bonding layer is arranged on the lower surface of the plastic sealing protective layer;
the metal stabilizing layer is arranged on the lower surface of the bonding layer;
the thermal bonding layer is arranged on the lower surface of the metal stabilizing layer;
the plastic sealing protective layer comprises a fiber woven mesh.
2. A heat-sealable film in accordance with claim 1, wherein: the anti-sticking layer comprises the following raw materials: at least one of polyethylene terephthalate, polybutylene terephthalate-adipate, and polylactic acid.
3. A heat-sealable film in accordance with claim 1 wherein: the bonding layer comprises at least one of a polyurethane layer, an epoxy resin layer and a polyurethane acrylate layer.
4. A heat-sealable film in accordance with claim 1 wherein: the metal stabilization layer includes at least one of an aluminum foil layer and a copper foil layer.
5. A heat-sealable film in accordance with claim 1 wherein: the raw material of the thermal bonding layer comprises the following components: at least one of microfibrillated cellulose, polyethylene and polypropylene.
6. A heat-sealable film in accordance with claim 1, wherein: the fiber woven mesh comprises at least one of a polyamide fiber woven mesh and a nylon woven mesh.
7. A heat-sealable film in accordance with claim 1, wherein: the thickness of the anti-sticking layer is 1-2 μm.
8. A heat-sealable film in accordance with claim 1 wherein: the thickness of the metal stable layer is 30-50 μm.
9. A process for preparing a heat-sealable film as claimed in any of claims 1 to 8 wherein: the method comprises the following steps:
and putting the raw materials into different charging pots, sequentially extruding the raw materials to the surface of the metal stable layer, and cooling to obtain the heat sealing film.
10. Use of a heat-sealable film as claimed in any one of claims 1 to 8 in the field of packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211189617.3A CN115418178A (en) | 2022-09-28 | 2022-09-28 | Heat-sealing film and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211189617.3A CN115418178A (en) | 2022-09-28 | 2022-09-28 | Heat-sealing film and preparation method and application thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225644A (en) * | 2011-04-02 | 2011-10-26 | 黄山永新股份有限公司 | Heat sealing film and preparation method thereof |
| CN106273958A (en) * | 2016-08-03 | 2017-01-04 | 海宁长昆包装有限公司 | A kind of high intensity Biaxially oriented polypropylene heat-sealing film and preparation method thereof |
| CN207028407U (en) * | 2017-06-08 | 2018-02-23 | 浙江伊美薄膜工业集团有限公司 | A kind of heat-sealing film |
| CN109986850A (en) * | 2017-12-29 | 2019-07-09 | 宁德时代新能源科技股份有限公司 | Lithium ion battery and aluminum plastic film |
| CN111469512A (en) * | 2020-04-14 | 2020-07-31 | 江阴申隆包装材料有限公司 | Food is with repeated heat-seal film and repeated heat-seal packaging film thereof |
-
2022
- 2022-09-28 CN CN202211189617.3A patent/CN115418178A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225644A (en) * | 2011-04-02 | 2011-10-26 | 黄山永新股份有限公司 | Heat sealing film and preparation method thereof |
| CN106273958A (en) * | 2016-08-03 | 2017-01-04 | 海宁长昆包装有限公司 | A kind of high intensity Biaxially oriented polypropylene heat-sealing film and preparation method thereof |
| CN207028407U (en) * | 2017-06-08 | 2018-02-23 | 浙江伊美薄膜工业集团有限公司 | A kind of heat-sealing film |
| CN109986850A (en) * | 2017-12-29 | 2019-07-09 | 宁德时代新能源科技股份有限公司 | Lithium ion battery and aluminum plastic film |
| CN111469512A (en) * | 2020-04-14 | 2020-07-31 | 江阴申隆包装材料有限公司 | Food is with repeated heat-seal film and repeated heat-seal packaging film thereof |
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