CN102886950A - Anti-mildew modified atmosphere packaging film for fruits and vegetables and preparation method for mildew-proof modified atmosphere packaging film - Google Patents
Anti-mildew modified atmosphere packaging film for fruits and vegetables and preparation method for mildew-proof modified atmosphere packaging film Download PDFInfo
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- CN102886950A CN102886950A CN2012103597458A CN201210359745A CN102886950A CN 102886950 A CN102886950 A CN 102886950A CN 2012103597458 A CN2012103597458 A CN 2012103597458A CN 201210359745 A CN201210359745 A CN 201210359745A CN 102886950 A CN102886950 A CN 102886950A
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Abstract
The invention discloses an anti-mildew modified atmosphere packaging film, which is prepared from the following components in parts by weight: 100 parts of low density polyethylene resin, 10 to 30 parts of linear polyethylene resin, 10 to 25 parts of ethylene-vinyl acetate resin, 0.5 to 5 parts of antioxidant, 0.5 to 1 part of antistatic agent, 1 to 2 parts of lubricant, 1 to 3 parts of silane coupling agent, 0.5 to 1.5 parts of anti-fogging agent, 5 to 10 parts of calcium carbonate master batch and 0.5 to 2 parts of nano zinc oxide coating solution. The invention also discloses a preparation method for the packaging film. The packaging film prepared by the method has an anti-oxidation function, an anti-fog function, an antibacterial function, an anti-mildew function and a fruit and vegetable respiration adjustment function, the refreshing time of fruits and vegetables can be prolonged, and the quality of the fruits and the vegetables can be improved.
Description
Technical field
The present invention relates to a kind of agricultural products fresh-keeping film, particularly relate to a kind of fruits and vegetables mildewproof air-conditioning preservative film and preparation method thereof.
Background technology
Fruits and vegetables are the important non-staple food during people live, and are the second largest agricultural products that is only second to grain, are the important source material of food industry.But because the post-harvest fresh-keeping aseptic technic is poor, cause the postharvest fruit and vegetable loss up to 20%～30%, and FAO's index only is 5%.
At present, domestic preserving fruit and vegetable utilizing mainly adopts the artificial air control storage of low temperature and uses inner wrapping preservative film pack.The artificial air control storage cost of low temperature is high, investment is large, and sells away rear consumer and can not continue to use the method to carry out fresh-retaining preserving, and this method is difficult for penetration and promotion; The most outstandingly in the inner wrapping preservative film packing effectively be coated with nano material at preservative film with exactlying, the nano material skewness that still is coated with, particle is easily reunited, and does not reach good fresh-keeping effect.
Therefore, a kind of novel fruits and vegetables mildewproof air-conditioning preservative film of exploratory development, the effect that makes its prolongation preserving fruit and vegetable utilizing phase that had both had conventional preservative film and improve fruit-vegetable quality, can reach well the bacteria mildew-proof effect that General Medicine can reach again, nano material can also be evenly distributed special crucial simultaneously.
Summary of the invention
Technical problem to be solved by this invention provides a kind of mildewproof air-conditioning preservative film and preparation method thereof, overcomes the shortcoming and defect of existing preservative film, to improve its fresh-keeping anti-mold effect.
For this reason, technical scheme of the present invention is as follows:
A kind of fruits and vegetables mildewproof air-conditioning preservative film is prepared from by the component of following weight portion:
Preferably, above-mentioned the ratio of each component is:
Described antioxidant is antioxidant 1076; Described antistatic additive is antistatic additive RLB-20/22; Described lubricant is paraffin or Tissuemat E; Described antifoggant is glycerin mono-fatty acid ester; Described calcium carbonate master batch is nanometer calcium carbonate superfine powder master batch.Used silane coupler preferably is adopted as vinyl, amino or isobutyl group one type of silane coupling agent
Described nano zine oxide coating fluid is prepared from by the component of following weight portion:
A kind of preparation method of fruits and vegetables mildewproof air-conditioning preservative film may further comprise the steps:
(1) preparation of master batch:
Each above-mentioned raw material is joined in the homogenizer in proportion, first behind the rotating speed stirring at low speed 1～2min with 50～80r/min, again with rotating speed high-speed stirred 2～5min of 120～150r/min, the compound that obtains mixing; Described compound after weighing, is joined in the high speed twin-screw exhaust mixing extrusion comminutor and is processed into tie rod, and described tie rod is made master batch through the cold cut machine;
(2) preparation of air-conditioning preservative film: prepared master batch is even with 3 kinds of remaining mixed with resin, and entering diameter through feed system is that 45～65mm, rotating speed are the single-screw bar extrusion blow molding machine of 35～45r/min, at 160 ℃～180 ℃ lower Blown Films;
(3) preparation of nano zine oxide coating fluid: zinc oxide 0.15～0.30 g, Macrogol 4000 .05～0.08g, 2,2-methoxyl group-2-acetophenone initator 7～22 g, distilled water 1L, mix, mechanical grinding 1～1.5h, obtaining concentration is the nano zine oxide coating fluid of 0.15～0.30g/L;
(4) the nano zine oxide coating fluid is fixing: nano zine oxide coating fluid lucifuge under the vacuum of 0.05～0.10MPa that step 3 is made leaves standstill, and gets rid of bubble; The nano zinc oxide fluid dispersion that drains behind the bubble is uniformly coated on the prepared air-conditioning preservative film with spin coater, at light intensity 500 μ W/cm
2Uviol lamp under the 10～15min that exposes; Then uncover preservative film and with its baking 3～5h under 40 ℃, obtain the fruits and vegetables mildewproof air-conditioning preservative film.
Wherein, the thickness of described fruits and vegetables mildewproof air-conditioning preservative film is 0.01-0.05mm, and the coating thickness of described nano zine oxide coating fluid is 1-5um.
Advantage of the present invention is:
(1) nano zine oxide that has used UV-curing technology will have antibacterial antisepsis is fixed on the preservative film, and fixing evenly, particle do not reunite; This technology also has energy-conservation and advantage environmental protection in addition.
(2) calcium carbonate master batch that adds can form microcellular structure, makes the food can spontaneous controlled-atmosphere (oxygen, carbon dioxide, ethene etc.), can reach good anti-mildew fresh-keeping purpose.
(3) through performance of steam is good, basic dewfall not in the sack.
(4) meet GB9687-1988 " used for packing foods products of polyethylene for food packaging sanitary standard ".
(5) transparency, pull resistance, tear resistance, flexibility, heat sealability etc. are functional.
(6) have good sterilization, anticorrosion and antioxygenic property.
The specific embodiment
Below in conjunction with specific embodiment packaging film of the present invention and preparation method thereof is elaborated.
In the following embodiments, used calcium carbonate master batch is that the model that Xiamen Green environmental protection in spring science and technology Materials Co., Ltd produces is the nanometer calcium carbonate superfine powder master batch of AF-288.In the actual production, also can select other suitable calcium carbonate superfine powder master batch.Used silane coupler preferably is adopted as vinyl, amino or isobutyl group one type of silane coupling agent.
Embodiment 1
Take by weighing each raw material by following proportioning:
The method for preparing the fruits and vegetables mildewproof air-conditioning preservative film with above-mentioned raw materials is as follows:
(1) preparation of master batch:
Each raw material described above is joined in the homogenizer in proportion, first behind the rotating speed stirring at low speed 2min with 60r/min, again with the rotating speed high-speed stirred 5min of 130r/min, the compound that obtains mixing; Described compound after weighing, is joined in the high speed twin-screw exhaust mixing extrusion comminutor and is processed into tie rod, and described tie rod is made master batch through the cold cut machine;
(2) preparation of air-conditioning preservative film: prepared master batch is even with 3 kinds of remaining mixed with resin, entering diameter through feed system is that 45mm, rotating speed are the single-screw bar extrusion blow molding machine of 45r/min, under 100 ℃, 135 ℃, 165 ℃, 185 ℃ four sections temperature, through Blown Film, obtain the counterdie of fruits and vegetables anti-mildew fresh-keeping film;
(3) preparation of nano zine oxide coating fluid: zinc oxide 0.25g, Macrogol 4000 .05g, 2,2-methoxyl group-2-acetophenone initator 22g, distilled water 1L mixes, mechanical grinding 1.5h, obtaining concentration is the nano zine oxide coating fluid of 0.25g/L;
(4) the nano zine oxide coating fluid is fixing: nano zinc oxide fluid dispersion lucifuge under the vacuum of 0.085MPa that step 3 is made leaves standstill, and gets rid of bubble; The nano zinc oxide fluid dispersion that drains behind the bubble is uniformly coated on the preservative film with spin coater, at light intensity 500 μ W/cm
2Uviol lamp under the 15min that exposes; Uncover preservative film and with its baking 5h under 40 ℃, obtain the fruits and vegetables mildewproof air-conditioning preservative film.
Embodiment 2
Take by weighing each raw material by following proportioning:
The method for preparing the fruits and vegetables mildewproof air-conditioning preservative film with above-mentioned raw materials is as follows:
(1) preparation of master batch:
Each raw material described above is joined in the homogenizer in proportion, first behind the rotating speed stirring at low speed 2min with 80r/min, again with the rotating speed high-speed stirred 5min of 150r/min, the compound that obtains mixing; Described compound after weighing, is joined in the high speed twin-screw exhaust mixing extrusion comminutor and is processed into tie rod, and described tie rod is made master batch through the cold cut machine;
(2) preparation of air-conditioning preservative film: prepared master batch is even with 3 kinds of remaining mixed with resin, entering diameter through feed system is that 65mm, rotating speed are the single-screw bar extrusion blow molding machine of 45r/min, under 100 ℃, 135 ℃, 165 ℃, 185 ℃ four sections temperature, through Blown Film, obtain the counterdie of fruits and vegetables anti-mildew fresh-keeping film;
(3) preparation of nano zine oxide coating fluid: zinc oxide 0.30g, Macrogol 4000 .08g, 2,2-methoxyl group-2-acetophenone initator 22g, distilled water 1L mixes, mechanical grinding 1.5h, obtaining concentration is the nano zine oxide coating fluid of 0.25g/L;
(4) the nano zine oxide coating fluid is fixing: nano zinc oxide fluid dispersion lucifuge under the vacuum of 0.085MPa that step 3 is made leaves standstill, and gets rid of bubble; The nano zinc oxide fluid dispersion that drains behind the bubble is coated on the preservative film with spin coater, at light intensity 500 μ W/cm
2Uviol lamp under the 15min that exposes; Uncover preservative film and with its baking 5h under 40 ℃, obtain the fruits and vegetables mildewproof air-conditioning preservative film.
Embodiment 3:
Take by weighing each raw material by following proportioning:
The method for preparing the fruits and vegetables mildewproof air-conditioning preservative film with above-mentioned raw materials is as follows:
(1) preparation of master batch:
Each raw material described above is joined in the homogenizer in proportion, first behind the rotating speed stirring at low speed 1min with 50r/min, again with the rotating speed high-speed stirred 2min of 120r/min, the compound that obtains mixing; Described compound after weighing, is joined in the high speed twin-screw exhaust mixing extrusion comminutor and is processed into tie rod, and described tie rod is made master batch through the cold cut machine;
(2) preparation of air-conditioning preservative film: prepared master batch is even with 3 kinds of remaining mixed with resin, entering diameter through feed system is that 65mm, rotating speed are the single-screw bar extrusion blow molding machine of 45r/min, under 100 ℃, 135 ℃, 165 ℃, 185 ℃ four sections temperature, through Blown Film, obtain the counterdie of fruits and vegetables anti-mildew fresh-keeping film;
(3) preparation of nano zine oxide coating fluid: zinc oxide 0.15g, PEG400 0.05g, 2,2-methoxyl group-2-acetophenone initator 7g, distilled water 1L mixes, mechanical grinding 1h, obtaining concentration is the nano zine oxide coating fluid of 0.25g/L;
(4) the nano zine oxide coating fluid is fixing: nano zinc oxide fluid dispersion lucifuge under the vacuum of 0.085MPa that step 3 is made leaves standstill, and gets rid of bubble; The nano zinc oxide fluid dispersion that drains behind the bubble is coated on the preservative film with spin coater, at light intensity 500 μ W/cm
2Uviol lamp under the 10min that exposes; Uncover preservative film and with its baking 3h under 40 ℃, obtain the fruits and vegetables mildewproof air-conditioning preservative film.
Fresh-keeping effect: fruits and vegetables mildewproof air-conditioning preservative film and common preservative film see the following form on the impact (depositing under 0 ℃) of Fuji apple quality:
Data from upper table can be found out, fruits and vegetables mildewproof air-conditioning preservative film of the present invention is compared with the preservative film that uses of selling on the market, can control well microbial growth, suppress the minimizing of ascorbic acid (Vc) and total phenol composition, reduce the rotting rate of fruit, have the effect of obvious fresh-keeping mildew-resistant.
Claims (10)
1. fruits and vegetables mildewproof air-conditioning preservative film is characterized in that being prepared from by the component of following weight portion:
2. fruits and vegetables mildewproof air-conditioning preservative film according to claim 1 is characterized in that: described the ratio of each component is:
3. fruits and vegetables mildewproof air-conditioning preservative film according to claim 1 and 2, it is characterized in that: described lubricant is paraffin or Tissuemat E; Described calcium carbonate master batch is nanometer calcium carbonate superfine powder master batch; Used silane coupler preferably is adopted as vinyl, amino or isobutyl group one type of silane coupling agent.
4. fruits and vegetables mildewproof air-conditioning preservative film according to claim 1 and 2, it is characterized in that: described antioxidant is antioxidant 1076.
5. fruits and vegetables mildewproof air-conditioning preservative film according to claim 1 and 2, it is characterized in that: described antistatic additive is antistatic additive RLB-20/22.
6. fruits and vegetables mildewproof air-conditioning preservative film according to claim 1 and 2 is characterized in that: described antifoggant is a kind of in glycerin mono-fatty acid ester, polysorbas20 and the span 20.
7. fruits and vegetables mildewproof air-conditioning preservative film according to claim 1 and 2, it is characterized in that: described nano zine oxide coating fluid is prepared from by the component of following weight portion:
8. the preparation method of a fruits and vegetables mildewproof air-conditioning preservative film claimed in claim 1 is characterized in that may further comprise the steps:
(1) preparation of master batch:
Each above-mentioned raw material is joined in the homogenizer in proportion, first behind the rotating speed stirring at low speed 1～2min with 50～80r/min, again with rotating speed high-speed stirred 2～5min of 120～150r/min, the compound that obtains mixing; Described compound after weighing, is joined in the high speed twin-screw exhaust mixing extrusion comminutor and is processed into tie rod, and described tie rod is made master batch through the cold cut machine;
(2) preparation of air-conditioning preservative film: prepared master batch is even with 3 kinds of remaining mixed with resin, and entering diameter through feed system is that 45～65mm, rotating speed are the single-screw bar extrusion blow molding machine of 35～45r/min, at 160 ℃～180 ℃ lower Blown Films;
(3) preparation of nano zine oxide coating fluid: zinc oxide 0.15～0.30g, Macrogol 4000 .05～0.08g, 2,2-methoxyl group-2-acetophenone initator 7～22g, distilled water 1L, mix, mechanical grinding 1～1.5h, obtaining concentration is the nano zine oxide coating fluid of 0.15～0.30g/L;
(4) the nano zine oxide coating fluid is fixing: nano zine oxide coating fluid lucifuge under the vacuum of 0.05～0.10MPa that step 3 is made leaves standstill, and gets rid of bubble; The nano zinc oxide fluid dispersion that drains behind the bubble is uniformly coated on the prepared air-conditioning preservative film, at light intensity 500 μ W/cm
2Uviol lamp under the 10～15min that exposes; Then uncover preservative film and with its baking 3～5h under 40 ℃, obtain the fruits and vegetables mildewproof air-conditioning preservative film.
9. preparation method according to claim 8, it is characterized in that: the thickness of described fruits and vegetables mildewproof air-conditioning preservative film is 0.01-0.05mm.
10. preparation method according to claim 8, it is characterized in that: the coating thickness of described nano zine oxide coating fluid is 1-5 μ m.
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| CN103289168A (en) * | 2013-06-21 | 2013-09-11 | 苏州新区佳合塑胶有限公司 | Environmental protection antibacterial polyethylene film master batch |
| CN103435885A (en) * | 2013-08-14 | 2013-12-11 | 吴江市英力达塑料包装有限公司 | Degradable inflaming retarding air bubble film and preparation method thereof |
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| CN105086061A (en) * | 2015-08-05 | 2015-11-25 | 安徽顺彤包装材料有限公司 | Fruit and vegetable air-conditioning freshness protection bag and processing method thereof |
| CN106046506A (en) * | 2016-07-30 | 2016-10-26 | 程志刚 | Fruit and vegetable fresh-keeping film and preparation method thereof |
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| CN114457595B (en) * | 2022-02-10 | 2024-03-19 | 全国供销合作总社济南果蔬华德公司 | Preparation method of organic silicon rubber modified atmosphere preservative film |
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