CN214563555U - Antibacterial antifogging barrier film for frozen food packaging - Google Patents
Antibacterial antifogging barrier film for frozen food packaging Download PDFInfo
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- CN214563555U CN214563555U CN202023024176.0U CN202023024176U CN214563555U CN 214563555 U CN214563555 U CN 214563555U CN 202023024176 U CN202023024176 U CN 202023024176U CN 214563555 U CN214563555 U CN 214563555U
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Abstract
The utility model discloses an antibacterial antifogging barrier film for frozen food packaging, which consists of an antibacterial polyamide layer, a first puncture-resistant polyamide layer, an EVOH barrier layer, a second puncture-resistant polyamide layer and a polyamide heat-sealing layer from outside to inside in sequence; the antibacterial polyamide layer is internally filled with a silver antibacterial agent; the first puncture-resistant polyamide layer and the second puncture-resistant polyamide layer are at least provided with three layers of structures; the antifogging agent is filled in the polyamide heat-sealing layer, so that excellent antifogging property and heat-sealing strength are provided for the film. The film has excellent puncture resistance, barrier property, antibacterial property, antifogging property and heat sealing property, is formed by multilayer coextrusion and double-drawing, does not need bonding of a binder, is energy-saving and environment-friendly, and is particularly suitable for packaging frozen foods.
Description
Technical Field
The utility model belongs to the technical field of the film packing, concretely relates to antibacterial antifog separation film for frozen food packaging.
Background
With the development of supermarkets, chain stores and cold storage chains, the cold chain food in China has already formed a scale and is growing at a speed of about 25% every year. At present, there are two main types of frozen food packaging, soft type and hard type packaging. Flexible type packaging is based on plastic film and accounts for the vast majority of the market for frozen food packaging. The soft package structure commonly used in the existing market mainly comprises: the OPP/PE composite film has the advantages of moisture resistance, cold resistance, strong heat-sealing tension and the like; the PA/PE composite film has better freezing resistance and impact resistance; ③ the pure PE film is used for packaging vegetables, etc. There are still many problems with existing frozen food packaging packages, such as: the low-temperature impact resistance is insufficient, so that transportation fracture is caused; secondly, the heat sealing strength is not enough, so that the heat sealing layer is damaged; thirdly, the composite strength is not enough, resulting in delamination and the like. With the further development of frozen foods, higher demands are also made on the properties of the packaging materials, such as: firstly, under the condition of low temperature, the survival time of microorganisms such as bacteria is prolonged, and the requirement on antibacterial performance is put forward; secondly, the influence of oxygen and the like on frozen food is reduced, and higher requirements on barrier property are put forward; the influence of the fog on the visual effect of the product is reduced, and the antifogging performance is realized; fourthly, the high-temperature and low-temperature environment adaptability is better, and hard food puts forward higher requirements on puncture resistance. In view of the above, there is still a need to develop a coextruded film with excellent comprehensive properties of antibiosis, high barrier, puncture resistance, antifogging and the like, so as to meet the requirements of people on the flexible package of frozen foods.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's weak point, provide a freezing food packaging is with antibiotic antifog separation film, solved among the above-mentioned background art freezing food packaging separation performance, antibacterial property, combined strength, puncture resistance and antifog performance subalternation problem.
The utility model provides a technical scheme that its technical problem adopted is: the antibacterial antifogging barrier film for packaging frozen food is provided and sequentially comprises an antibacterial polyamide layer, a first puncture-resistant polyamide layer, an EVOH barrier layer, a second puncture-resistant polyamide layer and a polyamide heat-sealing layer from outside to inside;
the antibacterial polyamide layer is internally filled with a silver antibacterial agent;
the first puncture-resistant polyamide layer and the second puncture-resistant polyamide layer are at least provided with three layers of structures;
and the antifogging agent is filled in the polyamide heat sealing layer.
In a preferred embodiment of the present invention, the thickness of the antibacterial polyamide layer is 1-3 μm.
In a preferred embodiment of the present invention, the silver-based antibacterial agent is a blend of silver sulfate and barium chloride, and the average particle size of the blend is 55 to 160 nm.
In a preferred embodiment of the present invention, the thickness of the puncture-resistant polyamide layer is 8-15 μm.
In a preferred embodiment of the present invention, the thickness of the EVOH barrier layer is 5-10 μm.
In a preferred embodiment of the present invention, the thickness of the polyamide heat-sealing layer is 1-3 μm.
Compared with the background technology, the technical scheme has the following advantages:
according to the scheme, the antibacterial antifogging barrier film for packaging frozen foods provides excellent antibacterial performance for the film through the surface antibacterial polyamide layer, so that bacteria are prevented from surviving in a freezing mode; by arranging the puncture-resistant polyamide layer, excellent low-temperature impact resistance and puncture resistance are provided for the film, and the problems that the existing frozen package is dropped to break a package and is punctured by a sharp packaged product are solved; by arranging the EVOH barrier layer, the barrier property of the package is improved, and the shelf life of the product is prolonged; design polyamide heat-seal layer provides good heat-seal strength, and possesses antifog effect, prevents that the difference in temperature from changing and leading to the fog to produce, reduces goods shelves effect. The film has excellent puncture resistance, barrier property, antibacterial property, antifogging property and heat sealing property; through multilayer coextrusion double-drawing molding, no adhesive is needed, the problem of delamination caused by insufficient composite strength of glue under the low-temperature condition is solved, and the method is particularly suitable for packaging frozen foods.
Drawings
Fig. 1 is a layer structure view of an antibacterial and antifogging barrier film for packaging frozen food of example 1.
Wherein, the antibacterial polyamide film comprises a 10-antibacterial polyamide layer, a 20-first puncture-resistant polyamide layer, a 30-EVOH barrier layer, a 40-second puncture-resistant polyamide layer and a 50-polyamide heat-sealing layer.
Detailed Description
The terms "inner" and "outer" are based on the film as a packaged state, the "inner" means a side close to the content, and the "outer" means a side far from the content.
The utility model relates to an antibiotic antifog separation film for frozen food package has set gradually antibiotic polyamide layer, resistant puncture polyamide layer, EVOH barrier layer, resistant puncture polyamide layer and polyamide heat-seal layer from outer to inner.
In the following examples, the antibacterial polyamide layer is made of an existing antibacterial nylon 6 material, the puncture-resistant polyamide layer is made of an existing puncture-resistant polyamide composite material, the EVOH layer is made of an existing ethylene-vinyl alcohol copolymer material, the polyamide heat-sealing layer is made of an existing copolymerized polyamide material, and the antifogging agent is made of an existing antifogging agent particle/powder material in the market.
When the thickness of the antibacterial polyamide layer is controlled to be 1-3 mu m, the thickness of the puncture-resistant polyamide layer is controlled to be 8-15 mu m, the thickness of the EVOH barrier layer is controlled to be 5-10 mu m, and the thickness of the polyamide heat-sealing layer is controlled to be 1-3 mu m, the cost performance of the film is higher, namely, the thickness of the composite film is as thin as possible on the premise of ensuring the puncture-resistant performance, the barrier performance, the antibacterial performance, the antifogging performance and the heat-sealing performance so as to reduce the production cost, so that the film is more economical and practical and meets the market demand.
Example 1
In this embodiment, the antibacterial antifogging barrier film for packaging frozen food is prepared by sequentially arranging an antibacterial polyamide layer 10, a first puncture-resistant polyamide layer 20, an EVOH barrier layer 30, a second puncture-resistant polyamide layer 40 and a polyamide heat-sealing layer 50 from outside to inside and performing multilayer co-extrusion biaxial stretching.
The thickness of the antibacterial polyamide layer 10 is 2 μm, the thickness of the first puncture-resistant polyamide layer 20 is 10 μm, the thickness of the EVOH barrier layer 30 is 7 μm, the thickness of the second puncture-resistant polyamide layer 40 is 10 μm, and the thickness of the polyamide heat-seal layer 50 is 2 μm.
In this embodiment, the antibacterial polyamide layer 10 is made of an antibacterial nylon 6 disclosed in the patent document "an antibacterial nylon 6 and a preparation method thereof" with publication number CN109880357A, the polyamide antibacterial layer 10 is made of a silver-based blend antibacterial agent, and the particle size of silver chloride and barium sulfate is 55-160 nm, so that the polyamide antibacterial layer has good antibacterial performance.
The first puncture-resistant polyamide layer 20 and the second puncture-resistant polyamide layer 40 both adopt a puncture-resistant biaxially oriented nylon film surface layer toughening composite material with a three-layer structure disclosed in CN108515762A, namely a puncture-resistant biaxially oriented nylon film with a three-layer structure and a preparation method thereof, and the toughening composite material is blended of copolymerized nylon and nylon resin, provides a certain puncture resistance for the film, and simultaneously has good physical properties such as barrier property, tensile strength and the like.
The EVOH barrier layer 30 is made of existing EVOH materials and provides high barrier properties to the film.
The polyamide heat-sealing layer 50 adopts a heat-sealing layer of a heat-sealable biaxially oriented nylon film disclosed in CN108481866A publication No. of A heat-sealable biaxially oriented nylon film and a preparation method thereof, the polyamide heat-sealing layer 50 has good heat-sealing performance, and meanwhile, the antifogging agent existing in the market is added to play a role in antifogging.
The antibacterial polyamide layer and the polyamide heat-sealing layer are added with the existing silicon dioxide opening agent and the existing erucamide slipping agent to achieve the effect of preventing opening.
Example 2
Example 2 differs from example 1 in that: the thickness of the antibacterial polyamide layer 10 is 3 μm, the thickness of the first puncture-resistant polyamide layer 20 is 15 μm, the thickness of the EVOH barrier layer 30 is 10 μm, the thickness of the second puncture-resistant polyamide layer 40 is 15 μm, and the thickness of the polyamide heat-seal layer 50 is 3 μm.
According to the antibacterial antifogging barrier film for packaging frozen foods, the surface antibacterial polyamide layer provides excellent antibacterial performance for the film, so that bacteria are prevented from surviving in a freezing mode; by arranging the puncture-resistant polyamide layer, excellent low-temperature impact resistance and puncture resistance are provided for the film, and the problems that the existing frozen package is dropped to break a package and is punctured by a sharp packaged product are solved; by arranging the EVOH barrier layer, the barrier property of the package is improved, and the shelf life of the product is prolonged; design polyamide heat-seal layer provides good heat-seal strength, and possesses antifog effect, prevents that the difference in temperature from changing and leading to the fog to produce, reduces goods shelves effect. The film has excellent puncture resistance, barrier property, antibacterial property, antifogging property and heat sealing property; through multilayer coextrusion double-drawing molding, no adhesive is needed, the problem of delamination caused by insufficient composite strength of glue under the low-temperature condition is solved, and the method is particularly suitable for packaging frozen foods.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (5)
1. The utility model provides an antibiotic antifog separation film for frozen food package which characterized in that: the anti-bacterial anti-puncture composite material sequentially consists of an anti-bacterial polyamide layer, a first puncture-resistant polyamide layer, an EVOH barrier layer, a second puncture-resistant polyamide layer and a polyamide heat-sealing layer from outside to inside;
the antibacterial polyamide layer is internally filled with a silver antibacterial agent;
the first puncture-resistant polyamide layer and the second puncture-resistant polyamide layer are at least provided with three layers of structures;
and the antifogging agent is filled in the polyamide heat sealing layer.
2. The antibacterial, antifog and barrier film for frozen food packaging according to claim 1, wherein: the thickness of the antibacterial polyamide layer is 1-3 mu m.
3. The antibacterial, antifog and barrier film for frozen food packaging according to claim 1, wherein: the puncture-resistant polyamide layer has a thickness of 8-15 μm.
4. The antibacterial, antifog and barrier film for frozen food packaging according to claim 1, wherein: the thickness of the EVOH barrier layer is 5-10 mu m.
5. The antibacterial, antifog and barrier film for frozen food packaging according to claim 1, wherein: the thickness of the polyamide heat-sealing layer is 1-3 mu m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023024176.0U CN214563555U (en) | 2020-12-15 | 2020-12-15 | Antibacterial antifogging barrier film for frozen food packaging |
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| CN202023024176.0U CN214563555U (en) | 2020-12-15 | 2020-12-15 | Antibacterial antifogging barrier film for frozen food packaging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116409038A (en) * | 2021-12-31 | 2023-07-11 | 奥升德功能材料(苏州)有限公司 | Frozen food packaging film with long-acting antibacterial and antivirus functions |
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2020
- 2020-12-15 CN CN202023024176.0U patent/CN214563555U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116409038A (en) * | 2021-12-31 | 2023-07-11 | 奥升德功能材料(苏州)有限公司 | Frozen food packaging film with long-acting antibacterial and antivirus functions |
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