Low-temperature-resistant CPP (Chlorinated Polypropylene) film
By introducing multi-layer structures such as antistatic, anti-corrosion, antibacterial, anti-freeze and wear-resistant layers into the CPP film, combining polyolefin, polyethylene and nano silver copper, the existing anti-low-temperature CPP films are solved in food packaging and refrigeration transportation. The poor anti-low temperature effect and lack of antibacterial function in the process have achieved higher food packaging safety and film durability.
Patent Information
- Application Number
- CN202421044621.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-14
AI Technical Summary
The existing anti-low-temperature CPP film has poor anti-low-temperature effect in food packaging and refrigeration transportation, lacks anti-bacterial and sterilization functions, affecting food safety.
A low-temperature anti-CPP film is designed, including a base layer, an anti-static layer, an anti-stretch layer, an anti-corrosion and anti-bacterial layer, an anti-freeze layer, an elastic layer and an wear-resistant layer, which uses polyolefin, polyethylene, nano-silver copper, and bidirectional stretching. Materials such as polymer polypropylene, ethylene propylene ternary rubber and polyurethane enhance the mechanical strength, airtightness and antibacterial properties of the film, and improve the anti-puncture effect through warp and weft braided layer and anti-puncture film material layer.
It improves the tensile resistance, anti-bacterial sterilization ability and low temperature resistance of the film, enhances the safety and integrity of food packaging, is suitable for inflatable and vacuum packaging of food, and maintains the integrity of the film during refrigeration transportation.
Smart Images
Figure CN222271529U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of CPP films, in particular to a low temperature resistant CPP film. Background Art
[0002] CPP is a polypropylene (PP) film produced by cast extrusion in the plastics industry. This type of film is different from BOPP (bidirectional polypropylene) film and is a non-oriented film. Strictly speaking, CPP film only has a certain orientation in the longitudinal (MD) direction, which is mainly due to the nature of the process. After searching, the prior art (application number: CN202023220286.4) records "a low-temperature resistant CPP film, comprising a base layer, an elastic layer fixedly connected to one side of the base layer, an anti-stretching layer fixedly connected to the side of the elastic layer away from the base layer, a corona layer fixedly connected to the side of the base layer away from the elastic layer, a fixed layer fixedly connected to the side of the corona layer away from the base layer, an ink layer fixedly connected to the side of the fixed layer away from the corona layer, the base layer is made of polypropylene, the elastic layer is made of high-density polyethylene, the anti-stretching layer is made of petroleum resin, the corona layer is made of ternary copolymer polypropylene, and the ink layer is made of water-based UV ink. The utility model adopts an anti-stretching layer to increase the tensile resistance of the film, which is not easily deformed and damaged by pulling, uses an elastic layer to increase the elasticity of the film, makes the film fit the plane better, and uses the corona layer to make the film have better adhesion and is not easy to delaminate."
[0003] Although the low-temperature resistant CPP film in the prior art achieves an anti-stretching effect, it still has poor low-temperature resistance and antibacterial and sterilization effects when used for food packaging, and cannot be transported by refrigeration. Utility Model Content
[0004] In order to overcome the defects of the prior art, a low-temperature resistant CPP film is provided to solve the problems that the low-temperature resistant CPP film in the prior art has poor low-temperature resistance, does not have antibacterial and sterilization functions, and is not conducive to food packaging and refrigerated transportation.
[0005] To achieve the above-mentioned purpose, a low-temperature resistant CPP film is provided, comprising: a film body, wherein the film body comprises a base layer, and an antistatic layer and an anti-stretching layer are respectively provided on both sides of the base layer, and an anti-ultraviolet layer is provided on the outside of the antistatic layer, and an anti-corrosion and antibacterial layer, an antifreeze layer, an elastic layer and a wear-resistant layer are sequentially provided on the outside of the anti-stretching layer.
[0006] Furthermore, the anti-stretching layer includes an inner polyolefin material layer and a polyethylene material layer arranged outside the polyolefin material layer.
[0007] Furthermore, the antiseptic and antibacterial layer includes an inner base film layer and a nano material layer arranged on the outer side of the base film layer, and the base film layer is set to be a biaxially oriented high molecular weight polypropylene material, and the nano material layer is set to be a nano silver copper material.
[0008] Furthermore, the antifreeze layer includes an inner toughening material layer and a composite material layer arranged outside the toughening material layer, and the toughening material layer is made of EPDM rubber.
[0009] Furthermore, a corona layer is provided between the elastic layer and the wear-resistant layer, and the elastic layer is made of high-density polyethylene material, and the wear-resistant layer is made of polyurethane material.
[0010] Furthermore, a heat sealing layer is provided between the base layer and the anti-stretching layer, and the base layer is made of polypropylene, and the heat sealing layer is a functional layer containing a ternary random copolymer.
[0011] Furthermore, the base layer includes a middle warp and weft knitting layer, and a first puncture-proof membrane material layer and a second puncture-proof membrane material layer compounded on both sides of the warp and weft knitting layer, and elastic holes are arranged inside the warp and weft knitting layer.
[0012] The beneficial effects of the utility model are:
[0013] 1. By providing the polyolefin material layer and the polyethylene material layer included in the anti-stretching layer, and the elastic layer, the film body has anti-stretching elastic properties, which increases the strength and toughness of the film and is not easily damaged by stretching. It is not only convenient for food inflation packaging, but also convenient for food vacuum packaging;
[0014] 2. By setting the base film layer and nano material layer included in the antiseptic and antibacterial layer, the mechanical strength, air tightness and transparency between the film molecules are increased by biaxially stretching the high molecular weight polypropylene, which has the effect of isolating external bacteria. At the same time, the nano silver copper material has the effect of sterilization and antibacterial, thereby improving the safety of food packaging;
[0015] 3. By providing the toughening material layer included in the antifreeze layer, the film's anti-oxidation, anti-ozone and anti-corrosion capabilities, as well as its resistance to low-temperature embrittlement, are improved, thereby facilitating the refrigerated transportation of food after packaging, while ensuring the integrity of the film and avoiding low-temperature embrittlement damage.
[0016] 4. By providing the warp and weft woven layers included in the base layer and two layers of puncture-proof film material layers, the puncture-proof effect of the CPP film is increased, which facilitates the puncture of the outer packaging bag when used for food packaging, thereby causing the corruption of the internal food. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the layered structure of the membrane body according to an embodiment of the present utility model.
[0018] Figure 2 This is a schematic diagram of the material structure of the anti-stretching layer of an embodiment of the utility model.
[0019] Figure 3 This is a schematic diagram of the material structure of the anti-corrosion and antibacterial layer of an embodiment of the utility model.
[0020] Figure 4 This is a schematic diagram of the material structure of the antifreeze layer of an embodiment of the utility model.
[0021] Figure 5 Schematic diagram of the base material structure of an embodiment of the utility model.
[0022] In the figure: 1, membrane body; 11, anti-ultraviolet layer; 12, antistatic layer; 13, base layer; 131, first anti-puncture membrane material layer; 132, warp and weft woven layer; 1321, elastic hole; 133, second anti-puncture membrane material layer; 14, anti-stretching layer; 141, polyolefin material layer; 142, polyethylene material layer; 15, anti-corrosion and antibacterial layer; 151, base membrane layer; 152, nano material layer; 16, antifreeze layer; 161, toughening material layer; 162, composite material layer; 17, elastic layer; 18, wear-resistant layer. DETAILED DESCRIPTION
[0023] Reference Figures 1 to 5 As shown, the utility model provides a low-temperature resistant CPP film, comprising: a film body 1, the film body 1 comprises a base layer 13, and an antistatic layer 12 and an anti-stretching layer 14 are respectively arranged on both sides of the base layer 13, and an anti-ultraviolet layer 11 is arranged on the outer side of the antistatic layer 12, and an anti-corrosion and antibacterial layer 15, an antifreeze layer 16, an elastic layer 17 and a wear-resistant layer 18 are arranged on the outer side of the anti-stretching layer 14 in sequence, a corona layer is further arranged between the elastic layer 17 and the wear-resistant layer 18, and the elastic layer 17 is set to a high-density polyethylene material, and the wear-resistant layer 18 is set to a polyurethane material, and a heat-sealing layer is further arranged between the base layer 13 and the anti-stretching layer 14, and the base layer 13 is set to a polypropylene material, and the heat-sealing layer is set to a functional layer containing a ternary random copolymer.
[0024] As a preferred implementation, by providing a corona layer, and the corona layer is set to be a ternary copolymer polypropylene material, the adhesion between the film material layers is increased, and it is not easy to delaminate.
[0025] As a preferred embodiment, by providing a heat-sealing layer, a heat-sealing operation can be achieved when used for packaging.
[0026] As a preferred embodiment, by providing a wear-resistant layer 18 and placing it on the outside of the film body 1, that is, the outside of the package, it will not be easily scratched during transportation and use.
[0027] As a preferred embodiment, by providing an anti-ultraviolet layer 11, the food on the inner side of the package is protected from direct sunlight, thereby increasing the food safety.
[0028] As a preferred embodiment, an antistatic layer 12 is provided, and the antistatic layer 12 is set to be a composite antistatic material made of quaternary ammonium salt and organic boron, so that it can be used to package and store some foods that are susceptible to static electricity, such as potato chips, biscuits, etc. Since these foods are prone to static electricity on their surfaces, which will affect the quality and taste of the food, the use of an antistatic layer can reduce the impact of static electricity on food quality.
[0029] like Figure 2 , Figure 3 and Figure 4 As shown, the anti-stretching layer 14 includes an inner polyolefin material layer 141 and a polyethylene material layer 142 arranged on the outer side of the polyolefin material layer 141, the anti-corrosion and antibacterial layer 15 includes an inner base film layer 151 and a nano material layer 152 arranged on the outer side of the base film layer 151, and the base film layer 151 is set to a biaxially oriented polymer polypropylene material, the nano material layer 152 is set to a nano silver copper material, and the antifreeze layer 16 includes an inner toughening material layer 161 and a composite material layer 162 arranged on the outer side of the toughening material layer 161, and the toughening material layer 161 is set to an EPDM rubber material.
[0030] As a preferred embodiment, by providing the anti-stretching layer 14, the film body 1 has anti-stretching elastic properties, which increases the strength and toughness of the film and makes it less susceptible to stretching damage. It is not only convenient for air packaging of food, but also for vacuum packaging of food.
[0031] As a preferred embodiment, by setting the antiseptic and antibacterial layer 15, the mechanical strength, air tightness and transparency between the molecules of the film body 1 are increased by biaxially stretching the high molecular weight polypropylene, which has the effect of isolating external bacteria. At the same time, the nano silver copper material has the effect of sterilization and antibacterial, thereby improving the safety of food packaging.
[0032] As a preferred embodiment, by providing an antifreeze layer 16, the film body 1 is improved in terms of its ability to resist oxidation, ozone and corrosion, as well as its resistance to low-temperature embrittlement, thereby facilitating the integrity of the film body 1 during refrigerated transportation after food packaging, thereby avoiding low-temperature embrittlement damage.
[0033] like Figure 5 As shown, the base layer 13 includes a middle warp and weft knitting layer 132 , and a first puncture-proof film material layer 131 and a second puncture-proof film material layer 133 compounded on both sides of the warp and weft knitting layer 132 , and elastic holes 1321 are provided inside the warp and weft knitting layer 132 .
[0034] Specifically, the warp and weft weaving layer 132 uses warp and weft made of polypropylene material, which has a certain elasticity. Dense elastic spaces 1321 are formed by laminating and compounding the warp and weft, so that the puncture-proof film material layer covering its surface has good toughness, thereby enhancing its own puncture-proof effect under external pressure.
[0035] When in use, by arranging the polyolefin material layer and the polyethylene material layer included in the anti-stretching layer, and the elastic layer, the film body has anti-stretching elastic properties, the strength and toughness of the film are increased, and it is not easy to be damaged by stretching, which is not only convenient for inflatable packaging of food, but also convenient for vacuum packaging of food; by arranging the base film layer and the nano material layer included in the antiseptic and antibacterial layer, the mechanical strength, air tightness and transparency between the film body molecules are increased by biaxially stretching the high molecular weight polypropylene, which has the effect of isolating external bacteria, and at the same time, the nano silver copper material has the effect of sterilization and antibacterial effect, thereby improving the safety of food packaging; by arranging the toughening material layer included in the antifreeze layer, the film body's antioxidant, ozone and erosion resistance, as well as the low-temperature embrittlement resistance are improved, which is convenient for ensuring the integrity of the film body during refrigerated transportation after food packaging, and avoiding low-temperature embrittlement damage.
[0036] The low-temperature resistant CPP film of the utility model can effectively solve the problems that the low-temperature resistant CPP film in the prior art has poor low-temperature resistance, lacks antibacterial and sterilization functions, and is not conducive to food packaging and refrigerated transportation. It achieves the increase of the low-temperature resistance of the CPP film and the antibacterial and sterilization functions on the basis of the existing low-temperature resistant CPP film technology, thereby improving the safety and wide application of the CPP film.
Claims
1. A low temperature resistant CPP film, comprising: The membrane body (1) is characterized in that: the membrane body (1) includes a base layer (13), and an antistatic layer (12) and an anti-stretching layer (14) are respectively provided on both sides of the base layer (13), and an anti-ultraviolet layer (11) is provided on the outer side of the antistatic layer (12), and an anti-corrosion and antibacterial layer (15), an antifreeze layer (16), an elastic layer (17) and a wear-resistant layer (18) are sequentially provided on the outer side of the anti-stretching layer (14).
2. A low temperature resistant CPP film according to claim 1, characterized in that: The anti-stretching layer (14) comprises an inner polyolefin material layer (141) and a polyethylene material layer (142) arranged outside the polyolefin material layer (141).
3. The low temperature resistant CPP film according to claim 1, characterized in that: The antiseptic and antibacterial layer (15) comprises an inner base film layer (151) and a nano material layer (152) arranged on the outer side of the base film layer (151), and the base film layer (151) is made of biaxially oriented high molecular weight polypropylene material, and the nano material layer (152) is made of nano silver copper material.
4. The low temperature resistant CPP film according to claim 1, characterized in that: The antifreeze layer (16) comprises an inner toughening material layer (161) and a composite material layer (162) arranged outside the toughening material layer (161), and the toughening material layer (161) is made of EPDM rubber.
5. The low temperature resistant CPP film according to claim 1, characterized in that: A corona layer is also provided between the elastic layer (17) and the wear-resistant layer (18), and the elastic layer (17) is made of high-density polyethylene material, while the wear-resistant layer (18) is made of polyurethane material.
6. The low temperature resistant CPP film according to claim 1, characterized in that: A heat-sealing layer is also provided between the base layer (13) and the anti-stretching layer (14), and the base layer (13) is made of polypropylene, and the heat-sealing layer is provided as a functional layer containing a ternary random copolymer.
7. The low temperature resistant CPP film according to claim 1, characterized in that: The base layer (13) comprises a middle warp and weft braided layer (132), and a first puncture-proof membrane material layer (131) and a second puncture-proof membrane material layer (133) compounded on both sides of the warp and weft braided layer (132), and elastic holes (1321) are provided inside the warp and weft braided layer (132).