JP4584670B2 - Fresh flower preservation method - Google Patents

Description

  The present invention significantly extends the storage period of a plant or a part thereof, for example, a fresh flower, does not brown the plant tissue, does not harden or contract the plant tissue, and does not absorb moisture in the atmosphere at room temperature. The present invention relates to a method for preserving a plant or a part thereof capable of maintaining the texture.

Various plant preservation solutions and preservation methods for replacing the water in the plant tissue with a liquid composition containing polyethylene glycol, glycerin, and the like have been proposed. For example, in Japanese Patent No. 3548744, it is possible to decorate for a long period of time while maintaining the same appearance as a fresh flower by immersing the fresh flower in methanol, ethanol or the like to remove tissue water and then replacing it with polyethylene glycol. However, when a fresh flower is immersed in methanol, ethanol or the like, the petal of the fresh flower turns brown, and the petal becomes disjointed due to rapid contraction of the petal due to dehydration and hardening of the tissue. Moreover, if it substitutes only with polyethylene glycol, it will absorb moisture in the atmosphere, and the natural texture cannot be maintained over a long period of time.
Japanese Patent No. 3548744

Also, Japanese Patent Publication No. 4-505766 has proposed a method for treating cut flowers in which the tissue water of flowers is replaced with a substance inappropriate for metabolism of humic plants, and there is a step of dehydrating fresh flowers. And then a step of immersing has been proposed, and in the step of dehydrating as an unsuitable substance for metabolism of humic plants, polyvinylpyrrolidone, polyvinyl alcohol, cellulose acetate, benzyl acetate Alternatively, ethyl, collodion, and nitrocellulose are cited, and in the immersion step, a mixture of polyethylene glycol 1000 and polyethylene glycol 400 is cited, but this method is very laborious and costly. Replacing with only the mixture absorbs moisture in the atmosphere and It can not be kept for a long time, such texture.
JP-T-4-505766

Further, in JP-A-2003-26501, tissue water of a plant leaf is immersed in a dehydrating solvent for dehydration, and then immersed in a penetrating solution containing polyethylene glycol and acetone to replace the tissue water with polyethylene glycol, and dyed with a pigment. In the preservation treatment method, a dehydration solvent has been proposed that uses a mixture of acetone and ethyl alcohol, and the plant leaf preservation treatment method is characterized by the fact that acetone used as a dehydration solvent has a water content. When the amount of water increases, water in the plant sewing tissue cannot be dehydrated well, and subsequent replacement with polyethylene glycol does not succeed. Moreover, if it substitutes only with polyethyleneglycol, it will absorb moisture in the atmosphere, and a natural texture cannot be maintained over a long period of time.
JP 2003-265501 A

  The present invention significantly extends the storage period of a plant body or a part thereof, the plant tissue does not turn brown, the plant tissue does not harden or shrink, and does not absorb moisture in the atmosphere at room temperature. An object of the present invention is to provide a method for preserving a plant that can be maintained.

  The plant preservation method according to the present invention comprises a step of immersing a plant body or a part thereof in a first liquid (decolorizing liquid) comprising a lower alcohol and an organic acid, and then comprising a lower alcohol, polyethylene glycol and polypropylene glycol. It consists of performing the process immersed in 2 liquids (preservation liquid). The first liquid (decolorizing liquid) may further contain water. The second liquid (preservation liquid) may further contain an organic acid.

  The preservation period of the plant body or a part thereof, for example, a fresh flower can be significantly extended, and a natural texture can be maintained.

  As the composition of the first liquid (decolorizing liquid), it is preferable that the organic acid is 0.1% by weight or more and the remainder is a lower alcohol. The upper limit of the organic acid is limited by the solubility in the lower alcohol used. The immersion time in the first liquid may be determined by looking at the decolorization situation, but is generally in the range of 20 to 30 hours. The composition of the second liquid (preservation liquid) is preferably 10 to 50% by weight of polyethylene glycol, 0.5 to 30% by weight of polypropylene glycol, and the rest being lower alcohol. The immersion time in the second liquid is generally in the range of 60 to 90 hours.

  The organic acid used in the first liquid (decolorizing liquid) may be any organic acid that is soluble in the lower alcohol, and preferably oxalic acid, citric acid, adivic acid, fumaric acid, maleic acid, tartaric acid, succinic acid, Malic acid or the like can be decolorized without being browned, hardened, or shrunk by mixing with C1 to C3 lower alcohol.

  In the second liquid (preservation liquid), the upper limit and the lower limit are set for the average molecular weight of polypropylene glycol. The reason why the average molecular weight is 150 or less is a monomer, and polypropylene glycol having an average molecular weight of 3000 or more becomes a solid at room temperature. It is because it cannot be achieved. The average molecular weight of polyethylene glycol is 200 to 800. If the average molecular weight is less than 200, water in the atmosphere is absorbed and plants cannot be stored sufficiently. If the average molecular weight is 800 or more, it becomes a hard solid at room temperature. This is because the natural texture cannot be maintained.

  In the second liquid, the composition composed of 10 to 50% by weight of polyethylene glycol, 0.5 to 30% by weight of polypropylene glycol, and the remaining weight% of C1 to C3 lower alcohol was 10% of polyethylene glycol. If it is less than 50%, the plant body or a part thereof cannot be completely preserved, and if polyethylene glycol is 50% by weight or more and polypropylene glycol is less than 0.5% by weight, it absorbs moisture in the atmosphere and increases the shelf life of the plant. If it is remarkably shortened and the polypropylene glycol is 30% by weight or more, the composition cannot be sufficiently substituted into the plant tissue. The weight percentage of the lower alcohols C1 to C3 is determined by the mixing ratio of polyethylene glycol and polypropylene glycol.

  A dye, a fragrance, a surfactant, and an antiseptic can be added to the composition of the first liquid (decoloring liquid) and the second liquid (preservation liquid) used in the present invention, if necessary. The types of dyes are acid dyes, basic dyes, disperse dyes, reactive dyes, direct dyes, azoic dyes, fluorescent whitening dyes, complex dyes, and the types of fragrances are natural fragrances, synthetic fragrances, and surfactants. Is a nonionic surfactant, cationic surfactant, anionic surfactant, amphoteric surfactant, and as preservatives, imidazole preservative, thiazole preservative, iodo preservative, nitrile preservative Phenolic preservatives, haloalkylthio preservatives, pyridine preservatives, triazine preservatives, bromine preservatives, quaternary ammonium salt preservatives, biguanide preservatives, and inorganic preservatives.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

The flower neck of fresh para flowers was used as a material, and this was dehydrated by immersion for 24 hours in the first liquid (decolorizing liquid) having the composition from Example 1 to Example 18 described in Table 1, Table 2 or Table 3. Then, after immersing in the second liquid (preservation liquid) having the composition of Examples 1 to 18 described in Table 1, Table 2 or Table 3 for 72 hours, lower alcohol (actually used) Was evaporated and dried. As an evaluation method of the effect of the present invention, the rose flower neck treated according to the present invention is stored in an incubator at 25 ° C. and 80% humidity for 24 hours, and then the browning of the flower, flower holding, texture and hygroscopicity are observed. Evaluation was made according to the following criteria. The results are shown in Table 1, Table 2, and Table 3.
Browning ○: No browning ×: Browning petals ○: No petal smears ×: Petals smeared and unchanging texture ○: Petals have a natural soft taste Yes ×: The petals are stiff and firm Hygroscopic ○: The petals do not contain moisture ×: The petals contain moisture, and the shape of the petals has collapsed

Comparative example

  The rose neck was treated in the same manner as in Examples 1 to 18 except that ethyl alcohol containing no organic acid was used as the first liquid (decolorizing liquid), and the same evaluation test as in Examples 1 to 18 was performed. The results are shown in Table 4.

In Tables 1, 2, 3 and 4, PEG 200 is polyethylene glycol having an average molecular weight of 200, PEG 600 is polyethylene glycol having an average molecular weight of 600, PEG 800 is polyethylene glycol having an average molecular weight of 800, PPG 400 is polypropylene glycol having an average molecular weight of 400, and PPG 2000 is an average molecular weight. 2000 polypropylene glycol. C2 ethyl alcohol was used as the lower alcohol.

  As is clear from the comparison between Examples and Comparative Examples, the present invention is excellent in all of browning resistance, flower durability, texture, and non-hygroscopicity.

The preservation period of the plant body or a part thereof, for example, fresh flowers can be significantly extended, the plant tissue is not browned, and the natural texture can be maintained for a long time without the plant tissue hardening or shrinking.

Claims (7)

A fresh flower preservation treatment method comprising immersing a fresh flower in a first liquid composed of a lower alcohol and an organic acid and then immersing the second flower in a second liquid composed of a lower alcohol, polyethylene glycol and polypropylene glycol ,
The method for preserving fresh flowers, wherein the lower alcohol in the first liquid and the second liquid is at least one selected from methyl alcohol, ethyl alcohol, and propyl alcohol . A method for preserving fresh flowers , comprising immersing a fresh flower in a first liquid composed of a lower alcohol, an organic acid, and water and then immersing the fresh flower in a second liquid composed of a lower alcohol, polyethylene glycol, and polypropylene glycol. And
The method for preserving fresh flowers, wherein the lower alcohol in the first liquid and the second liquid is at least one selected from methyl alcohol, ethyl alcohol, and propyl alcohol . The fresh flowers was immersed in a first solution comprising a lower alcohol and an organic acid, with fresh flowers save processing method consisting of carrying out the process of immersing the second solution comprising a lower alcohol and polyethylene glycol and polypropylene glycol and organic acids There,
The method for preserving fresh flowers, wherein the lower alcohol in the first liquid and the second liquid is at least one selected from methyl alcohol, ethyl alcohol, and propyl alcohol . A fresh flower preservation treatment comprising immersing a fresh flower in a first liquid composed of a lower alcohol, an organic acid and water and then immersing the fresh flower in a second liquid composed of a lower alcohol, polyethylene glycol, polypropylene glycol and an organic acid. A method ,
The method for preserving fresh flowers, wherein the lower alcohol in the first liquid and the second liquid is at least one selected from methyl alcohol, ethyl alcohol, and propyl alcohol . The method for preserving fresh flowers according to any one of claims 1 to 4 , wherein the organic acid in the first liquid is 0.1 to 60% by weight, water is 0 to 25.0% by weight, and the rest is a lower alcohol. The method for preserving fresh flowers according to any one of claims 1 to 4 , wherein the polyethylene glycol in the second liquid has an average molecular weight in the range of 200 to 800, and the polypropylene glycol has an average molecular weight in the range of 150 to 2000. The polyethylene glycol in the second liquid is 10.0 to 50.0% by weight, the polypropylene glycol is 0.5 to 30.0% by weight, the organic acid is 0 to 30.0% by weight, and the remainder is a lower alcohol. The fresh flower preservation | save processing method of thru | or 4 .