JPH069441U - Fruit bag - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is such that even if a fruit bag is covered, dew condensation does not occur inside, resulting in high humidity, and thus less disease bacteria occur, and the fruit becomes hot. Provide a fruit bag with excellent heat resistance and excellent durability. [Structure] Split fiber webs made of a thermoplastic synthetic resin having a hydroxy group are laminated so as to intersect with each other,
A fruit bag made of bonded non-woven fabric 5 with a titanium dioxide layer 6 provided on the surface thereof. Furthermore, titanium dioxide layer 6
A biotite layer or an aluminum layer may be further provided on the inside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fruit bag used for cultivating fruits such as apples, pears, peaches, loquats, nectarines and grapes.

[0002]

[Prior art]

 In the cultivation of fruit trees such as apples, pears, peaches, loquats, nectarines and grapes, it has long been practiced to put paper bags on the fruits for the purpose of removing pests, improving the appearance of fruits, and preventing split fruits. There is. Since this paper bag for fruits covers the fruits for more than one month in the summer, it is required to have durability against sun rays, rain and wind. In order to improve the strength of the paper bag, it is known to apply wax or oil or use paraffin paper as a material. For some fruits, a waterproof fruit bag may be used. The fruit bag also aims to improve the appearance of the fruit, but for that purpose, it is necessary to increase the shading rate of the fruit bag. In order to increase the light-shielding rate, there is known a fruit bag in which dark-colored paper such as black, dark blue, and dark green is used on the inside. In addition, fruit bags that have undergone antibacterial treatment are also known to prevent the development of disease bacteria.

As described above, although there are various kinds of fruit bags, the most problematic points at present when using the fruit bags are the occurrence of pathogens due to high humidity in the fruit bags and the high temperature of the fruit bag surface. It is the deterioration of taste due to stuffiness. That is, for example, when the air temperature is 32 to 33 ° C., the surface temperature of the fruit bag irradiated with the sun rays is around 50 ° C., and the temperature is rapidly lowered when the sun sets in the evening. This temperature difference between day and night causes dew condensation inside the fruit bag. In this way, if the formed dewdrop adheres to the surface of the fruit, disease bacteria are likely to occur. In the morning, when the sun rises and the temperature rises, the dew condensation evaporates and it becomes humid, and the inside of the fruit bag becomes damp, and even at a high temperature of about 50 ° C during the day. Will reach. Due to this dew condensation, stuffiness, and high temperature, disease bacteria are easily generated in the fruit, and the taste of the fruit is deteriorated.

[0004]

[Problems to be solved by the device]

 The present invention does not cause dew condensation inside the container even if it is covered with a fruit bag, so that it is less likely to cause disease bacteria, and the fruit temperature becomes significantly higher than the outside temperature. The present invention aims to provide a fruit bag that does not have heat shielding properties.

[0005]

[Means for Solving the Problems]

 As a result of various studies to solve the above problems of the conventional fruit bag, the present inventor has found that it is important that the fruit bag is hydrophilic and that the fruit bag has a property of blocking solar heat. Based on this finding, we completed the present invention.

That is, the present invention is composed of a non-woven fabric obtained by laminating and adhering split fiber webs made of a thermoplastic synthetic resin having a hydroxy group so as to cross each other in a weft and weft direction, and provided with a titanium dioxide layer on the surface thereof. It is a fruit bag that is characterized by.

The nonwoven fabric constituting the fruit bag of the present invention is manufactured as follows. A thermoplastic synthetic resin having a hydroxy group, such as a polyvinyl alcohol having an average polymerization degree of 1400 or more and a saponification degree of 99% or more, is formed into a film, and the film is uniaxially oriented, for example, about 5.5 to 6.5 times in the longitudinal direction. After hot drawing, split treatment is performed. By this split treatment, numerous crack lines are generated in the film in the stretching direction, and the film is finely divided into a flat fibrous web. The flat split fiber web thus obtained is unexpanded or widened, and a plurality of split fiber webs are laminated and bonded so that the fiber directions cross each other, that is, the weft and cross directions. The porosity of the nonwoven fabric, that is, the fruit bag, can be adjusted by the degree of widening at this time. For the adhesion, an adhesive such as polyvinyl alcohol is applied and adhered. This non-woven fabric itself is known, and is commercially available from Kanebo Co., Ltd. under the trade names such as Bertuff and Bertuki.

Since this non-woven fabric is made of a thermoplastic synthetic resin having a hydroxy group such as polyvinyl alcohol, not only the strength and durability are good, but also the hydrophilicity is good. Therefore, the fruit bag made of this non-woven fabric is strong and absorbs the generated dew condensation, so that no dew condensation occurs in the fruit bag.

However, the fruit bag made of this non-woven fabric has a poor heat shielding property against sunlight. Therefore, in the present invention, a titanium dioxide layer is formed on the surface of the fruit bag. The white color of the titanium dioxide layer can reflect the sun's rays and shield it. This titanium dioxide layer may be provided on both sides of the non-woven fabric forming the fruit bag, or on only one side. The titanium dioxide layer is formed, for example, by immersing a non-woven fabric in a liquid mixture prepared by adding 10 to 40% by weight of titanium dioxide powder to a resin liquid, squeezing the liquid, and heating and drying. The concentration of the resin liquid may be about 4 to 10%, and the resin is preferably a hydrophilic resin such as polyvinyl alcohol. This titanium dioxide layer is preferably formed when it is a non-woven fabric, but it may be formed after forming it into a fruit bag.

If the fruit bag is provided with a light-shielding property, the appearance of the fruit can be finished beautifully. In order to obtain a shading rate of 95% or more in the fruit bag of the present invention, a biotite layer or an aluminum layer may be formed inside the titanium dioxide layer. That is, it is preferable to first provide the above-mentioned nonwoven fabric with a biotite layer or an aluminum layer, and then provide the titanium dioxide layer thereon as described above. This biotite layer or aluminum layer is formed by immersing the nonwoven fabric in a compounded liquid prepared by adding biotite or aluminum powder to the resin liquid in an amount of 3 to 10% by weight, squeezing the liquid, and heating and drying. It is preferable to use scale-like biotite powder as the biotite powder. A hydrophilic resin such as polyvinyl alcohol is preferred as the resin. The concentration of the resin liquid may be about 4-10%.

In the present invention, the porosity of the non-woven fabric can be arbitrarily changed as described above, and the heat shield coefficient and the light shield coefficient can be arbitrarily changed by forming the titanium dioxide layer, the biotite layer and the aluminum layer. it can. For example, the shading rate can be arbitrarily changed from 50% to 98%, and the porosity can be arbitrarily changed from 0% to 10%. When the ambient temperature is 32 ° C and the sun is radiated, the surface temperature of the conventional ordinary fruit bag is about 50 ° C before and after, but in the fruit bag of the present invention, for example, the shading rate is 98%, the voids are When the rate is 0%, the surface temperature of the fruit bag is around 38 ° C, and the heat shield effect is recognized. As described above, in the fruit bag of the present invention, the porosity, the light-shielding rate, and thus the heat-shielding coefficient can be arbitrarily changed, so that the fruit bag suitable for each type of fruit, the period of use, the period of use, etc. Can be obtained. For grapes, etc., water-repellent treatment may be applied to prevent splitting of fruits.

To make a fruit bag from a non-woven fabric, a conventional method can be used. Adhesion of the periphery can be performed by gluing, sewing with a sewing machine, etc., but in order to perform efficiently and reliably, it is best to use an ultrasonic sewing machine by utilizing the heat fusion property of the synthetic resin. The fruit bag can be single-layered and does not need to be double- or triple-layered. In addition, the conventional fruit bag made of paper is disposable for each season, but the fruit bag of the present invention is removed after the season and washed thoroughly to remove adhering dust and restore whiteness. Once the treatment is taken, it can be used continuously for 5 years. Further, as in the conventional paper fruit bag, a stopper for stopping the fruit bag on the twig may be attached to the side end of the fruit bag.

FIG. 1 shows a fruit bag of the present invention, and FIG. 1 is a plan view thereof. Here, 1 is a fruit bag, 2 is a fold line, 3 is a peripheral adhesive portion, and 4 is an opening of the fruit bag. 2 and 3 are schematic front views of the fruit bag of the present invention when the opening 4 is expanded. FIG. 2 shows an example in which a titanium dioxide layer is provided on each side of a fruit bag, 5 is a non-woven fabric, and 6 is a titanium dioxide layer. FIG. 3 shows an example in which a biotite layer and a titanium dioxide layer are sequentially provided on both sides of a fruit bag, 5 is a non-woven fabric, 6 is a titanium dioxide layer, and 7 is a biotite layer.

[0014]

[Effect of device]

 The fruit bag of the present invention is made of a non-woven fabric made by stacking and adhering a split fiber web made of a thermoplastic synthetic resin having a hydroxy group so that the webs cross each other, so that it is durable and hydrophilic. There is no condensation inside the fruit bag. Therefore, it is possible to prevent the generation of disease bacteria due to high humidity in the fruit bag. In addition, since the titanium dioxide layer is provided on the surface of the fruit bag, it has a heat-shielding property against sun rays, so that it is possible to prevent the taste from deteriorating due to the fruit becoming hot or steaming. In addition, if a biotite layer or an aluminum layer is provided on the inner surface of the fruit bag, a light blocking rate of 95% or more can be obtained, and this light blocking can improve the appearance of the fruit. Further, the fruit bag of the present invention is durable and can be used for 5 years or more.

[Brief description of drawings]

FIG. 1 is a plan view of a fruit bag of the present invention.

FIG. 2 is a front view showing a state in which an opening of a fruit bag according to an example of the present invention is opened.

FIG. 3 is a front view showing a state where the opening of the fruit bag of the present invention is opened.

[Explanation of symbols]

1 fruit bag, 2 folds, 3 adhesives, 4 openings,
5 Nonwoven fabric, 6 Titanium dioxide layer, 7 Biotite layer

Claims (2)

[Scope of utility model registration request] 1. A non-woven fabric formed by laminating and adhering split fiber webs made of a thermoplastic synthetic resin having a hydroxy group so as to cross each other in a weft and weft direction, and having a titanium dioxide layer provided on the surface thereof. Fruit bag to do. 2. A non-woven fabric obtained by laminating and adhering split fiber webs made of a thermoplastic synthetic resin having a hydroxy group so as to cross each other in a weft and weft direction, and having a biotite layer or an aluminum layer and a titanium dioxide layer on the surface thereof. A fruit bag characterized by being provided in sequence.