CN202344969U - Co-extrusion preservative film with breathing function - Google Patents
Co-extrusion preservative film with breathing function Download PDFInfo
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- CN202344969U CN202344969U CN2011203894629U CN201120389462U CN202344969U CN 202344969 U CN202344969 U CN 202344969U CN 2011203894629 U CN2011203894629 U CN 2011203894629U CN 201120389462 U CN201120389462 U CN 201120389462U CN 202344969 U CN202344969 U CN 202344969U
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Abstract
The utility model discloses a co-extrusion preservative film with a breathing function. The co-extrusion preservative film comprises an inner layer film and an outer layer film. The inner layer film comprises a resin layer; the outer layer film comprises a thermoplastic polyurethane layer; the resin layer comprises a linear low-density polyethylene resin layer and an ethylene-vinyl acetate resin layer; the linear low-density polyethylene resin layer is 70-90% of the resin layer in weight percent; and the residual part includes lubricant and vinyl acetate. Antioxygen with different amounts is respectively added in the inner layer and the outer layer of the co-extrusion preservative film, so that carbon dioxide and oxygen can selectively pass through a film material by using the advantage of good air permeability of the thin film material. The oxygen content in a fruit and vegetable package is reduced. Meanwhile, the content of the carbon dioxide is increased, the aerobic respiration of fruits and vegetables is restrained, and the fresh-keeping property is good. Furthermore, the properties of the co-extrusion preservative film are further improved by adding an antibacterial agent and an ethylene absorbing decomposing agent. A preparation method of the co-extrusion preservative film has the advantages of reasonable and simple steps and lower cost.
Description
Technical field
The utility model relates to a kind of postharvest technology of fruits and vegetables, is specifically related to a kind of co-extrusion preservative film with respiratory function.
Background technology
China is fruits and vegetables production and consumption big country maximum in the world the; But annual all have fruits and vegetables about 30% in storage, transportation owing to can not fresh-keepingly losing; The fruit and vegetable air-conditioning preservation film is used for the packing of fresh fruit of vegetables; Suppressing metabolism, the nutriment loss of fruits and vegetables in the preservation process, keeping the local flavor and the quality of fruits and vegetables, have huge economic and social value at the fresh-keeping aspect of China's fruits and vegetables.Preservation technique commonly used has low-temperature cold store, controlled atmosphere cold, antistaling agent processing, plastic foil coating etc., and cold air storage and the investment of controlled atmosphere freezer equipment are big, and maintenance cost is high; With the fruits and vegetables that antistaling agent is handled, the residual food security that concerns of antistaling agent; Simple and easy to do with the coating of breathable plastics film, cost is lower.
After the fruits and vegetables results, still keep absorbing the metabolic respiratory activity that oxygen is discharged carbon dioxide.As oxygen content reduces with carbon dioxide content and raises in packing, and can make fruits and vegetables keep faint aerobic respiration and does not produce anaerobic respiration, and the aging course of fresh fruit of vegetables is delayed, the reduction rate of metabolism, thus prolong storage period.Adopt the breathable plastics film as gas-exchange membrane; Gas and atmosphere carry out Gas Exchange in the packing; Infiltrate oxygen and in packing, discharge the faint aerobic respiration of excess carbon dioxide maintenance fruits and vegetables from atmosphere; Through regulating the composition of plastic sheeting, control vegetable and fruit packaging carbon dioxide and concentration of oxygen.
Degree of recognition is a polyethylene than higher preservative film material mostly in the market; Its ventilative water permeability does not often reach instructions for use; Form the pore type membrane structure through in polyethylene film, adding inorganic humectant among the Chinese patent CN1467245A; This structure is to lean on two kinds of incompatible components of drawing-off to form a lot of micropores as capillary, and the physical arrangement of film is the decisive factor of penetration.Therefore, in order to adapt to the preservative film requirement of market increasingly stringent, be necessary existing preservative film is improved.
The utility model content
The purpose of the utility model is, develops a kind of co-extrusion preservative film of realizing oxygen and carbon dioxide selectivity absorption with respiratory function.
For realizing above-mentioned utility model purpose, the technical scheme of the utility model is a kind of co-extrusion preservative film with respiratory function, it is characterized in that, this co-extrusion preservative film comprises inner layer film and outer membrane, and said inner layer film comprises resin bed; Said outer membrane comprises thermoplastic urethane layers.
Wherein, said resin bed includes linear low density polyethylene resin layer and ethylene-vinyl acetate resin layer, and the percentage by weight that said linear low density of polyethylene resin bed accounts for said resin bed is 70～90%; Remainder is lubricant and Tissuemat E.
The thickness of said inner layer film is 2～5 μ m, and the thickness of said outer membrane is 15～25 μ m.
The preparation method of this co-extrusion preservative film, said preparation method comprises the steps:
The first step: the raw material that disposes inner layer film and outer membrane in proportion;
Second step: the raw material of inner layer film is added homogenizer, and heat temperature raising obtains even inner layer film compound after the stirring;
The 3rd step: the inner layer film compound is joined granulation in the double screw extruder, obtain inner layer film compound grain;
The 4th step: the raw material of outer membrane is added homogenizer, and heat temperature raising obtains external uniform layer film compound after the stirring;
The 5th step: the outer membrane compound is joined granulation in the double screw extruder, obtain outer membrane compound grain;
The 6th step: inner layer film compound grain and outer membrane compound grain are added coextrusion casting extruder supply moulding;
The 7th step: the film of moulding is cut finished product after purifying in 60～80 hours, obtain said co-extrusion preservative film.
Wherein, said second step at first adds resin to homogenizer, heat temperature raising to 110～130 ℃, and insulation adds the A lubricant, stirs after 2～3 minutes, stirs 2～3 minutes behind the adding deoxidier, adds the ethylene absorbing distintegrant again, stirs 6～9 minutes.
Wherein, said the 4th step at first adds thermoplastic polyurethane to homogenizer, heat temperature raising to 95～115 ℃, and insulation adds the B lubricant, stirs after 2～3 minutes, and adding deoxidier and antiseptic stirred 6～9 minutes.
Wherein, the head temperature of double screw extruder is 110～130 ℃ during said the 3rd step inner layer film granulation, and the head temperature of double screw extruder is 100～120 ℃ during said the 5th step outer membrane granulation.
Wherein, said coextrusion casting cross-head portion temperature is 120～130 ℃.
The advantage of the utility model is with beneficial effect: internal layer and the skin at the co-extrusion preservative film adds different amount antioxidant respectively; Utilize the advantage of thin-film material good permeability; Realize that membrane material passes through the selectivity of carbon dioxide and oxygen, reduce the content of oxygen in the vegetable and fruit packaging, the content of the carbon dioxide that raises simultaneously; Suppress the aerobic respiration of fruits and vegetables, fresh keeping property is good.In addition, the adding of antiseptic and ethylene absorbing distintegrant further improves the performance of this co-extrusion preservative film.Preparation method's step of this co-extrusion preservative film is rationally simple, and cost is lower.
Description of drawings
Fig. 1 is the structural representation that the utlity model has the co-extrusion preservative film of respiratory function.
The specific embodiment
Below in conjunction with embodiment, the specific embodiment of the utility model is further described.Following examples only are used for more clearly explaining the technical scheme of the utility model, and can not limit the protection domain of the utility model with this.
Embodiment 1
As shown in Figure 1, the utility model is a kind of co-extrusion preservative film with respiratory function, and this co-extrusion preservative film comprises inner layer film 1 and outer membrane 2, and said inner layer film comprises resin bed 1-1; Said outer membrane comprises thermoplastic urethane layers 2-1.
Wherein the composition of inner layer film resin comprises 70 parts in the mixture of linear low density polyethylene resin and ethylene-vinyl acetate resin; Wherein to account for the percentage by weight of resin total amount be 80% to the linear low density of polyethylene resin; 0.25 part of Tissuemat E; 0.1 part of oleic acid, 0.1 part in ascorbic acid loads on 15 parts in potassium permanganate on the micron order silica gel; Outer membrane consist of 100 parts of thermoplastic polyurethanes, 1 part of organo-silicon compound, 0.4 part of oleic acid, 0.2 part of sorbate, 0.4 part of shitosan.
In the utility model, said resin bed includes linear low density polyethylene resin layer and ethylene-vinyl acetate resin layer, and the percentage by weight that said linear low density of polyethylene resin bed accounts for said resin bed is 70～90%; Remainder is lubricant and Tissuemat E.The thickness of said inner layer film 1 is 2～5 μ m, and the thickness of said outer membrane 2 is 15～25 μ m.
Preparation method with co-extrusion preservative film of respiratory function comprises the steps:
The first step: dispose raw material in proportion;
Second step: add resin to homogenizer, heat temperature raising to 110 ℃, insulation adds Tissuemat E, stirs after 2～3 minutes, stirs 2～3 minutes behind the adding glucose oxidase, adds silver oxide again, stirs 6～9 minutes, obtains even inner layer film compound;
The 3rd step: it is granulation in 110 ℃ the double screw extruder that the inner layer film compound is joined head temperature, obtains inner layer film compound grain;
The 4th step: add thermoplastic polyurethane to homogenizer, heat temperature raising to 95 ℃, insulation adds organic silicide, stirs after 2～3 minutes, and adding glucose oxidase and shitosan stirred 6～9 minutes, obtained external uniform layer film compound;
The 5th step: it is granulation in 100 ℃ the double screw extruder that the outer membrane compound is joined head temperature, obtains outer membrane compound grain;
The 6th step: the coextrusion casting extruder coextrusion mold that with inner layer film compound grain and outer membrane compound grain adding head temperature is 120 ℃;
The 7th step: the film of moulding is cut finished product after purifying in 60 hours, obtain said co-extrusion preservative film.
The above only is the preferred implementation of the utility model; Should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model know-why, can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.
Claims (2)
1. the co-extrusion preservative film with respiratory function is characterized in that, this co-extrusion preservative film comprises inner layer film and outer membrane, and said inner layer film comprises resin bed; Said outer membrane comprises thermoplastic urethane layers.
2. the co-extrusion preservative film with respiratory function as claimed in claim 1 is characterized in that, the thickness of said inner layer film is 2～5 μ m, and the thickness of said outer membrane is 15～25 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203894629U CN202344969U (en) | 2011-10-14 | 2011-10-14 | Co-extrusion preservative film with breathing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203894629U CN202344969U (en) | 2011-10-14 | 2011-10-14 | Co-extrusion preservative film with breathing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202344969U true CN202344969U (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203894629U Expired - Fee Related CN202344969U (en) | 2011-10-14 | 2011-10-14 | Co-extrusion preservative film with breathing function |
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| CN (1) | CN202344969U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2888944A1 (en) * | 2013-12-27 | 2015-07-01 | Plastics Industry Development Center | Aging delaying material for fruits and vegetables and producing method thereof |
| CN106317444A (en) * | 2015-06-23 | 2017-01-11 | 大连瑞贤达塑胶有限公司 | Method for preparing PE/TiO2 micropore preservative film |
| CN107163349A (en) * | 2017-06-29 | 2017-09-15 | 山东省农业科学院农产品研究所 | Three layers of natural complex fresh-keeping film and its preparation method and application |
| CN108690345A (en) * | 2017-03-31 | 2018-10-23 | 东丽塑料美国股份有限公司 | The method for preparing the cross-linked polyolefin of the coextrusion with TPU coatings |
| CN111034782A (en) * | 2019-12-23 | 2020-04-21 | 上海直帆冷链技术有限公司 | Multifunctional phase change energy storage ice bag and application thereof |
| CN111716845A (en) * | 2020-04-30 | 2020-09-29 | 江阴申隆包装材料有限公司 | Fruit and vegetable packaging film for breath preservation |
| CN116409545A (en) * | 2023-04-12 | 2023-07-11 | 淮阴师范学院 | Degradable preservative film for fruit and vegetable transportation and preparation method and application thereof |
-
2011
- 2011-10-14 CN CN2011203894629U patent/CN202344969U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2888944A1 (en) * | 2013-12-27 | 2015-07-01 | Plastics Industry Development Center | Aging delaying material for fruits and vegetables and producing method thereof |
| CN106317444A (en) * | 2015-06-23 | 2017-01-11 | 大连瑞贤达塑胶有限公司 | Method for preparing PE/TiO2 micropore preservative film |
| CN108690345A (en) * | 2017-03-31 | 2018-10-23 | 东丽塑料美国股份有限公司 | The method for preparing the cross-linked polyolefin of the coextrusion with TPU coatings |
| CN107163349A (en) * | 2017-06-29 | 2017-09-15 | 山东省农业科学院农产品研究所 | Three layers of natural complex fresh-keeping film and its preparation method and application |
| CN111034782A (en) * | 2019-12-23 | 2020-04-21 | 上海直帆冷链技术有限公司 | Multifunctional phase change energy storage ice bag and application thereof |
| CN111716845A (en) * | 2020-04-30 | 2020-09-29 | 江阴申隆包装材料有限公司 | Fruit and vegetable packaging film for breath preservation |
| CN111716845B (en) * | 2020-04-30 | 2022-09-23 | 江阴申隆包装材料有限公司 | Fruit and vegetable packaging film for breath preservation |
| CN116409545A (en) * | 2023-04-12 | 2023-07-11 | 淮阴师范学院 | Degradable preservative film for fruit and vegetable transportation and preparation method and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20181014 |