A fresh flower preservation method

Abstract

The present invention relates to a fresh flower preservation method, which is carried out in the following steps in sequence: (1) Invert the fresh flower, soak it in a resin solution, and then place it upright; (2) Irradiate the flower petals with an electron beam to cure the resin on the surface of the petals. The fresh flower preservation method provided by the present invention can enhance the compressive resistance and anti-fouling performance of the fresh flower petals, enabling the treated fresh flowers to better withstand impacts and squeezes during transportation. Through this method, the petals also have a certain ability to resist ultraviolet rays, and the color of the petals will not change significantly after being placed outdoors for a long time. At the same time, the cycle of water loss and withering is greatly extended, expanding the sales range of fresh flowers.

Description

Technical Field

[0001] The present invention relates to the field of agricultural product preservation, and particularly to a fresh flower preservation method. Background Art

[0002] Fresh flowers are loved by everyone for their bright colors, excellent decorative properties and symbolic meanings given by humans. However, the quality guarantee period of fresh flowers is only 7 days, so they can only be planted and produced locally. In cold northern regions, greenhouses often need to be built for planting, so the cost is relatively high, which is not conducive to popularization and application. Artificial flower decorations such as plastic flowers often have poor decorative effects and are not accepted by consumers.

[0003] In current fresh flower preservation methods, there is a solution to form a thin coating on the surface of fresh flowers by a curing method. However, traditional thermal curing methods will damage the petals, while ultraviolet curing methods, due to the fact that ultraviolet rays can only propagate in a straight line, do not cure the resin at the narrow slits between petals thoroughly, and the uncured monomers will volatilize and produce unpleasant odors.

[0004] In view of this, this invention is specifically proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a fresh flower preservation method, which grafts a thin coating on the surface of fresh flower petals to block the oxidation of the petals, and at the same time has the effects of anti-ultraviolet and stain resistance, and can greatly extend the shelf life of fresh flowers.

[0006] To achieve the above purpose, the present invention provides a fresh flower preservation method, which is carried out in the following steps in sequence:

[0007] (1) Invert the fresh flowers, soak them in the resin solution, and then place them upright;

[0008] (2) Use electron beam to irradiate the petals to cure the resin on the surface of the petals.

[0009] Preferably or optionally, the resin solution comprises the following raw materials in weight percentages: 30 - 50% of methyl methacrylate, 30 - 40% of 1,6 - hexanediol diacrylate, 10 - 15% of dipropylene glycol diacrylate, 1 - 3% of 2 - hydroxy - 4 - n - octyloxybenzophenone, 2 - 4% of leveling agent, and the balance is solvent.

[0010] Preferably or optionally, the viscosity of the resin solution is 120 - 250 cps.

[0011] Preferably or optionally, the step (1) further comprises a step of standing for 30 - 40 s after soaking.

[0012] Preferably or optionally, the ambient oxygen concentration during electron beam curing in step (2) is not higher than 200 ppm, the irradiation parameters are 300 - 400 kV, and the irradiation dose is 20 - 40 kGy.

[0013] Preferably or optionally, the resin solution comprises raw materials in the following weight percentages: 30 - 40% of pure acrylate oligomer, 30 - 40% of 1,6 - hexanediol diacrylate, 10 - 15% of dipropylene glycol triacrylate, 1 - 3% of 2 - hydroxy - 4 - n - octyloxybenzophenone, 2 - 4% of leveling agent, and the balance is solvent.

[0014] Preferably or optionally, the viscosity of the resin solution is 300 - 500 cps.

[0015] Preferably or optionally, after the resin is cured in step (2), the process further includes inverting the fresh flowers, soaking them in an ethanol solution for ultrasonic cleaning, taking them out and drying them by blowing air with the flowers placed upright.

[0016] Preferably or optionally, the ambient oxygen concentration during electron beam curing in step (2) is not higher than 200 ppm, the irradiation parameters are 300 - 400 kV, and the irradiation dose is 20 - 40 kGy.

[0017] Preferably or optionally, the resin solution further includes a color paste having the same color as the fresh flower petals.

[0018] Beneficial effects

[0019] The fresh flower preservation method provided by the present invention can enhance the compressive resistance and anti - pollution performance of fresh flower petals, enabling the treated fresh flowers to better withstand impacts and squeezes during transportation. By this method, the petals also have a certain ability to resist ultraviolet rays, and the color of the petals will not change significantly after being placed outdoors for a long time. At the same time, the cycle of water loss and withering is greatly extended, expanding the sales range of fresh flowers. Description of the drawings

[0020] Figure 1 It is a diagram of the initial state of the petals treated by the method in Example 1 of Effect Example 1;

[0021] Figure 2 It is a diagram of the state of the petals treated by the method in Example 1 of Effect Example 1 after being placed for 60 days;

[0022] Figure 3 It is a diagram of the initial state of the untreated petals in Effect Example 1;

[0023] Figure 4 It is a diagram of the state of the untreated petals in Effect Example 1 after being placed for 7 days;

[0024] Figure 5It is a state diagram of untreated petals placed for 14 days in Effect Example 1;

[0025] Figure 6 It is a state diagram of untreated petals after extrusion in Effect Example 2;

[0026] Figure 7 It is a state diagram of petals treated by the method in Example 1 after extrusion in Effect Example 2. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] In addition, to better illustrate the present invention, numerous specific details are given in the following detailed implementation manners. Those skilled in the art should understand that the present invention can be implemented without some specific details. In some embodiments, raw materials, components, methods, means, etc. well-known to those skilled in the art are not described in detail to highlight the gist of the present invention.

[0029] The materials, reagents, etc. used in the following embodiments can be obtained from commercial channels without special instructions.

[0030] Unless otherwise clearly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "having" etc. will be understood to include the stated elements or components, without excluding other elements or other components.

[0031] The fresh flowers used in the embodiments of the present invention are all ordinary commercially available fresh flowers;

[0032] Methyl methacrylate is purchased from China National Petroleum and Chemical Corporation;

[0033] The pure acrylate oligomer is purchased from Changxing Chemical Industry Co., Ltd., with the product number DR-A870.

[0034] Example 1

[0035] This example provides a fresh flower preservation method, and the method is carried out according to the following steps.

[0036] First, prepare a resin solution by mixing the following raw materials according to the mass ratio: 50% methyl methacrylate, 30% 1,6 - hexanediol diacrylate, 10% dipropylene glycol diacrylate, 3% 2 - hydroxy - 4 - n - octyloxybenzophenone, 2% BYK - 333 leveling agent from BYK company, and the balance is solvent ethanol. Mix the above raw materials and stir to obtain the resin solution.

[0037] In this example, the viscosity of the prepared resin solution is 250 cps.

[0038] In this example, the fresh flower used is a rose. Invert the fresh flower, immerse the petal part in the resin solution prepared above for 5 s and then take it out, and then let it stand for 40 s until the resin solution on the surface drains out.

[0039] Place the fresh flower upright, and then carry out electron beam curing in an environment with an oxygen concentration not higher than 200 ppm. The irradiation parameters are 400 kV and the irradiation dose is 40 kGy. After curing is completed, the fresh flower treated with fresh - keeping is obtained.

[0040] Example 2

[0041] This example provides a fresh - flower fresh - keeping method, and the method is carried out according to the following steps.

[0042] First, prepare a resin solution by mixing the following raw materials according to the mass ratio: 40% methyl methacrylate, 35% 1,6 - hexanediol diacrylate, 13% dipropylene glycol diacrylate, 2% 2 - hydroxy - 4 - n - octyloxybenzophenone, 3% BYK - 333 leveling agent from BYK company, and the balance is solvent ethanol. Mix the above raw materials and stir to obtain the resin solution.

[0043] In this example, the viscosity of the prepared resin solution is 200 cps.

[0044] In this example, the fresh flower used is a rose. Invert the fresh flower, immerse the petal part in the resin solution prepared above for 5 s and then take it out, and then let it stand for 35 s until the resin solution on the surface drains out.

[0045] Place the fresh flower upright, and then carry out electron beam curing in an environment with an oxygen concentration not higher than 200 ppm. The irradiation parameters are 350 kV and the irradiation dose is 30 kGy. After curing is completed, the fresh flower treated with fresh - keeping is obtained.

[0046] Example 3

[0047] This example provides a fresh - flower fresh - keeping method, and the method is carried out according to the following steps.

[0048] First, prepare a resin solution by mixing the following raw materials according to the mass ratio: methyl methacrylate 30%, 1,6 - hexanediol diacrylate 40%, dipropylene glycol diacrylate 15%, 2 - hydroxy - 4 - n - octyloxybenzophenone 1%, BYK - 333 leveling agent from BYK company 2%, and the balance is solvent ethanol. Mix the above raw materials and stir to obtain the resin solution.

[0049] In this example, the viscosity of the prepared resin solution is 120 cps.

[0050] In this example, the fresh flower used is a rose. Invert the fresh flower, soak the petal part in the resin solution prepared above for 5 s and then take it out, and then let it stand for 30 s until the resin solution on the surface drains out.

[0051] Place the fresh flower upright, and then carry out electron beam curing in an environment with an oxygen concentration not higher than 200 ppm. The irradiation parameters are 300 kV and the irradiation dose is 20 kGy. After curing is completed, the fresh flower treated with fresh - keeping is obtained.

[0052] Example 4

[0053] This example provides a fresh - flower fresh - keeping method, and the method is carried out according to the following steps.

[0054] First, prepare a resin solution by mixing the following raw materials according to the mass ratio: pure acrylate oligomer 30%, 1,6 - hexanediol diacrylate 30%, dipropylene glycol diacrylate 10%, 2 - hydroxy - 4 - n - octyloxybenzophenone 3%, BYK - 333 leveling agent from BYK company 2%, and the balance is solvent ethanol. Mix the above raw materials and stir to obtain the resin solution.

[0055] In this example, the viscosity of the prepared resin solution is 300 cps.

[0056] In this example, the fresh flower used is a rose. Invert the fresh flower, soak the petal part in the resin solution prepared above for 5 s and then take it out.

[0057] Place the fresh flower upright, and then carry out electron beam curing in an environment with an oxygen concentration not higher than 200 ppm. The irradiation parameters are 400 kV and the irradiation dose is 40 kGy.

[0058] After curing is completed, invert the fresh flower again, soak it in a 10% ethanol solution, and carry out ultrasonic cleaning to remove the uncured resin solution remaining on the surface. After cleaning, place it upright and dry it by blowing at room temperature, and the fresh flower treated with fresh - keeping is obtained.

[0059] Example 5

[0060] This example provides a fresh - flower fresh - keeping method, and the method is carried out according to the following steps.

[0061] First, prepare a resin solution by mixing the following raw materials according to the mass ratio: 40% pure acrylate oligomer, 40% 1,6 - hexanediol diacrylate, 15% dipropylene glycol diacrylate, 1% 2 - hydroxy - 4 - n - octyloxybenzophenone, 2% leveling agent BYK - 333 selected from BYK Company, and the balance is solvent ethanol. Mix and stir the above raw materials to obtain the resin solution.

[0062] In this example, the viscosity of the prepared resin solution is 500 cps.

[0063] In this example, the fresh flower used is a rose. Invert the fresh flower, soak the petal part in the prepared resin solution for 5 s, and then take it out.

[0064] Place the fresh flower upright, and then perform electron beam curing in an environment with an oxygen concentration not higher than 200 ppm. The irradiation parameters are 350 kV and the irradiation dose is 30 kGy.

[0065] After curing, invert the fresh flower again, soak it in a 10% ethanol solution, and perform ultrasonic cleaning to remove the uncured resin solution remaining on the surface. After cleaning, place it upright and dry it by blowing at room temperature to obtain the fresh flower treated with freshness preservation.

[0066] Example 6

[0067] This example provides a method for preserving fresh flowers, and the method is carried out according to the following steps.

[0068] First, prepare a resin solution by mixing the following raw materials according to the mass ratio: 35% pure acrylate oligomer, 35% 1,6 - hexanediol diacrylate, 13% dipropylene glycol diacrylate, 2% 2 - hydroxy - 4 - n - octyloxybenzophenone, 3% leveling agent BYK - 333 selected from BYK Company, and the balance is solvent ethanol. Mix and stir the above raw materials to obtain the resin solution.

[0069] In this example, the viscosity of the prepared resin solution is 400 cps.

[0070] In this example, the fresh flower used is a rose. Invert the fresh flower, soak the petal part in the prepared resin solution for 5 s, and then take it out.

[0071] Place the fresh flower upright, and then perform electron beam curing in an environment with an oxygen concentration not higher than 200 ppm. The irradiation parameters are 300 kV and the irradiation dose is 20 kGy.

[0072] After curing, invert the fresh flower again, soak it in a 10% ethanol solution, and perform ultrasonic cleaning to remove the uncured resin solution remaining on the surface. After cleaning, place it upright and dry it by blowing at room temperature to obtain the fresh flower treated with freshness preservation.

[0073] Example 7

[0074] This example provides a fresh flower preservation method, and the method is carried out according to the following steps.

[0075] First, prepare a resin solution by mixing the following raw materials according to the mass ratio: 30% of methacrylate oligomer, 30% of 1,6 - hexanediol diacrylate, 10% of dipropylene glycol diacrylate, 3% of 2 - hydroxy - 4 - n - octyloxybenzophenone, 2% of BYK - 333 leveling agent selected from BYK company, 2% of color paste, and the balance is solvent ethanol. Mix and stir the above raw materials to obtain the resin solution. The color of the color paste is the same as the petal color of the fresh flowers to be used subsequently.

[0076] In this example, the viscosity of the prepared resin solution is 300 cps.

[0077] The fresh flowers used in this example are roses. Invert the fresh flowers, soak the petal part in the prepared resin solution for 5 s and then take it out.

[0078] Place the fresh flowers upright, and then carry out electron beam curing in an environment with an oxygen concentration not higher than 200 ppm. The irradiation parameters are 400 kV and the irradiation dose is 40 kGy.

[0079] After curing, invert the fresh flowers again, soak them in a 10% ethanol solution, and carry out ultrasonic cleaning to remove the residual uncured resin solution on the surface. After cleaning, place them upright and blow - dry at room temperature to obtain the fresh flowers treated with preservation.

[0080] Example 8

[0081] The technical solution of this example is basically the same as that of Example 1, except that after the curing treatment, it further includes the step of spraying an atomized plant fragrance slow - release agent on the surface of the fresh flowers.

[0082] Effect Example 1

[0083] Take the petals of the fresh flowers treated with preservation prepared by the method in Example 1 and the petals of the same variety of fresh flowers without treatment, place them in the same indoor environment, and observe the morphological changes with days as the cycle. The results are as Figures 1-5 shown.

[0084] From Figures 1-2 it can be seen that the petals of the fresh flowers treated by the method in Example 1 have no obvious morphological changes after being placed for 60 days.

[0085] From Figures 3-5 it can be seen that the petals of the fresh flowers without treatment start to lose water and wither at the beginning of placement. When placed for 7 days, the state of losing water and withering is relatively serious, and they are completely withered when placed for 14 days.

[0086] Effect Example 2

[0087] Take the petals of the fresh flowers treated by the method in Example 1 and the petals of the same variety of fresh flowers without treatment, and squeeze them hard with fingers respectively. The results are as Figures 3-4 shown.

[0088] It can be seen from Figures 3-4 that obvious imprints are produced on the petals without treatment after squeezing, while there is no obvious change on the petals treated by the method in Example 1 after squeezing.

[0089] Thus, it can be seen that by using the method in this application to treat the petals of fresh flowers, the anti-squeezing ability of the petals can be effectively improved, which helps the fresh flowers to better cope with the impacts and squeezes generated during transportation.

[0090] It can be seen from the above results that the fresh flower preservation method provided by the present invention can enhance the compressive resistance and anti-fouling performance of the fresh flower petals, so that the treated fresh flowers can better cope with the impacts and squeezes during transportation. By this method, the petals also have a certain anti-ultraviolet ability, and the color of the petals will not change significantly after being placed outdoors for 60 days. At the same time, the cycle of water loss and withering is greatly extended, and the sales range of fresh flowers is expanded.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fresh flower preservation method, characterized in that, it is carried out in the following steps in sequence: (1) Invert the fresh flower, soak it in the resin solution, and then place it upright; (2) Use an electron beam to irradiate the petals to cure the resin on the petal surface; The resin solution comprises raw materials in the following weight percentages: 30-50% of methyl methacrylate, 30-40% of 1,6-hexanediol diacrylate, 10-15% of dipropylene glycol diacrylate, 1-3% of 2-hydroxy-4-n-octyloxybenzophenone, 2-4% of a leveling agent, and the balance is a solvent; the viscosity of the resin solution is 120-250 cps; or The resin solution comprises raw materials in the following weight percentages: 30-40% of a pure acrylate oligomer, 30-40% of 1,6-hexanediol diacrylate, 10-15% of dipropylene glycol diacrylate, 1-3% of 2-hydroxy-4-n-octyloxybenzophenone, 2-4% of a leveling agent, and the balance is a solvent; the viscosity of the resin solution is 300-500 cps; In step (2), the environmental oxygen concentration for electron beam curing is not higher than 200 ppm, the irradiation parameter is 300-400 kV, and the irradiation dose is 20-40 kGy.

2. The fresh flower preservation method according to claim 1, characterized in that, when the resin solution comprises methyl methacrylate, step (1) further comprises a step of standing for 30-40 s after soaking.

3. The fresh flower preservation method according to claim 1, characterized in that, when the resin solution comprises a pure acrylate oligomer, step (2) further comprises a process of inverting the fresh flower, soaking it in an ethanol solution for ultrasonic cleaning, taking it out, placing it upright, and blowing it dry.

4. The fresh flower preservation method according to claim 1, characterized in that, when the resin solution comprises a pure acrylate oligomer, the resin solution further comprises a color paste having the same color as the fresh flower petals.

Images