JP4936284B2 - Moisturizing non-woven packaging - Google Patents

Description

  The present invention relates to a package containing a moisturizing nonwoven fabric provided with moisturizing properties by containing a moisturizing component.

  A wet tissue is a product in which an impregnating liquid such as water or alcohol is contained in a nonwoven fabric. Conventionally, this wet tissue package has a cylindrical shape or a box shape made of resin, or a bag-shaped film package. And this wet tissue package body contains impregnating liquid about 2 to 3 times the mass of the nonwoven fabric, and requires complete sealing to prevent volatilization of this large amount of moisture and alcohol, and is a highly moisture-proof resin container And wrapped in film. Some of the wet tissue packages contain a preservative such as an antifungal agent in order to prevent the generation of mold (Patent Document 1).

  Conventionally, as a tissue paper package, there is a tissue paper that contains dry tissue paper, and is generally made of a paper carton or a pocket tissue for film packaging (Patent Document 2).

Furthermore, the moisturizing tissue is a moisturizing fiber web product in which tissue paper contains a moisturizing component and moisture. The moisturizing tissue package is the same as the tissue paper package.
JP 2003-79530 A JP-A-9-48477

  Moisturizing non-woven products are used in homes and sanitary applications, such as in homes and offices, where ordinary people live and are exposed to changes in temperature and humidity. Further, it is often stored for a long time or used for a long time after opening. Further, pulp and rayon are often blended in the sheet serving as the base material, and it has hygroscopicity. Pulp, rayon, etc. are cellulose, and when there is a lot of moisture, they are susceptible to biological attacks such as mold. As a method for suppressing the generation of mold, there is a method in which a preservative such as an antifungal agent is blended.

  In addition, a product containing a large amount of moisture such as wet tissue requires complete sealing to prevent volatilization of moisture, requires a highly moisture-proof container and film, and the packaging container becomes expensive. Furthermore, the usability was inferior, such as the need to seal or seal to prevent drying during use.

  Conventional box paper packaging containers for tissue paper and moisturizing tissue use paper materials with high moisture permeability. However, moisturizing non-woven fabric products have a higher content of moisturizing components and higher hygroscopicity than moisturizing tissue, and therefore, when stored in these containers, mold may be generated when stored for a long period of time.

  Further, since the moisture contained in the moisturizing nonwoven fabric is moisture retained by the moisture retaining component and the nonwoven fabric, it is not necessary to completely seal the packaging container. However, the moisture content of the moisturizing nonwoven fabric is affected by the moisture content of the environment, and if the environment is high humidity, the moisture content also increases. If the environment becomes dry, the moisture content also decreases.

  Therefore, the present invention has good usability by buffering the moisture change with a packaging container having a certain condition, practically reduces the risk of mold and the like, and requires less preservatives. Therefore, an object is to provide a moisturizing nonwoven fabric package that is highly safe and inexpensive.

  In addition, when oil is contained in the moisturizing liquid of the moisturizing nonwoven fabric, there is a risk of eroding the material of the film. Therefore, when the film is used for a packaging container, a film made of a material that is hardly affected by the oil is used. An object of the present invention is to provide a moisturized nonwoven fabric package.

  The moisture contained in the moisturizing non-woven fabric goes back and forth with the moisture in the environment, and this amount of moisture is affected by the humidity of the environment. The water activity value is free water in water contained in a substance, and is water that can be used for the growth of organisms. This water activity value is obtained by measuring the relative humidity of the atmosphere in contact with the substance, and has a relationship of water activity value (aw) = relative humidity RH (%) × 0.01. Other factors such as time, nutrient source, temperature, presence of hyphae and oxygen content also have an effect, but if this water activity value is 0.80 or higher, there is a high possibility of mold generation, and if it is 0.90 or higher, bacteria are generated. There is a possibility that.

  In the present invention, if it is a packaging container that keeps the moisture activity value of the moisturizing nonwoven fabric of the contents when allowed to stand for 3 hours under the following test conditions to 0.70 or less, there is little possibility of occurrence of mold in practice. I found it. The water activity value of the moisturizing nonwoven product stored in the packaging container is affected by the moisture absorption of the moisturizing nonwoven fabric, the moisture permeability of the container, the sealing property of the container, the dew condensation phenomenon due to temperature change, and the like. For this reason, it is effective to use the water activity value of the moisturizing nonwoven fabric stored in the packaging container as a criterion for determining the occurrence of mold as a criterion.

  Therefore, the moisturizing nonwoven fabric package according to the present invention is a moisturizing nonwoven fabric package in which the moisturizing nonwoven fabric is housed in a packaging container, and is left to stand for 24 hours in a standard state at a temperature of 23 ° C. and a relative humidity of 50%. It is assumed that the moisture activity value of the moisturizing nonwoven fabric is kept at 0.70 or less when left in an environment of 23 ° C. and 85% relative humidity for 3 hours. In addition, the water activity value of the moisturizing nonwoven fabric is more preferably 0.65 or less, and even more preferably 0.60 or less. In addition, the product stored in the packaging container with high airtightness under the test conditions has almost no change in the water activity value before and after the test, and the water activity value before the test needs to be 0.70 or less. The water activity value of a general wet tissue product is about 0.98, which is not in this range.

  Furthermore, the moisturizing nonwoven fabric according to the present invention has a structure in which the packaging container can be closed, and the lid can be opened and then closed.

  Furthermore, in the moisture retaining nonwoven fabric package according to the present invention, the outlet of the packaging container has a slit structure or a superposed structure using a synthetic resin film or sheet, and the moisture retaining nonwoven fabric stored in the container can be taken out from the outlet. .

Furthermore, the moisture retention nonwoven fabric package according to the present invention is such that the moisture permeability according to JIS-L 1099 (A-2 method) of the material of the packaging container is 42 g / m ² · h or less. The moisture permeability is more preferably 20 g / m ² · h or less, and further preferably 10 g / m ² · h or less. With such moisture permeability, an increase in the water activity value of the moisturizing nonwoven fabric can be more sufficiently suppressed.

  Furthermore, the moisture-retaining non-woven fabric package according to the present invention is such that the packaging container is a laminate of a synthetic resin film or sheet and paper, and the shape of the packaging container is box-shaped.

  Furthermore, in the moisturizing nonwoven fabric package according to the present invention, the packaging container has a double structure of a synthetic resin film or sheet and paper, and the shape of the packaging container is box-shaped.

  Further, in the moisturizing nonwoven fabric package according to the present invention, the synthetic resin film or sheet of the packaging container contains one or more of stretched polypropylene, polyethylene terephthalate or polyethylene. Examples of polyethylene include LDPE (low density polyethylene) and LLDPE (linear low density polyethylene). Of these, a film subjected to satin embossing is preferable. If it does in this way, it will be hard to receive to the influence of an oil component, and it can also reduce a water vapor transmission rate. Laminated films can be used to improve heat resistance and oil resistance of these films and to reduce moisture permeability. For example, configurations such as VMPET (aluminum-deposited polyethylene terephthalate), PET / LLDPE, OP / CPP, and PET / VMPET / LLDPE can be mentioned.

  Furthermore, in the moisture retaining nonwoven fabric according to the present invention, the moisture contained in the moisture retaining nonwoven fabric is moisture absorbed and retained by the moisture retaining component or the nonwoven fabric fibers.

  Furthermore, the moisturizing nonwoven fabric package according to the present invention contains 1% or more of a water-soluble component with respect to the weight of the nonwoven fabric, and the equilibrium moisture content of the moisturizing nonwoven fabric and the equilibrium when the water-soluble component is removed from the moisturizing nonwoven fabric. When the moisture content is compared, the equilibrium moisture content increase rate is 0.5% or more.

  Furthermore, in the moisturizing nonwoven fabric package according to the present invention, the fibers constituting the moisturizing nonwoven fabric contain at least one of pulp and rayon.

  A moisturizing nonwoven fabric is a nonwoven fabric containing a moisturizing component. The water-soluble component is a component (excluding fallen fibers) that is washed away when the moisturizing nonwoven fabric is washed with distilled water at 60 ° C. Water-soluble ingredients include water-soluble and water-dispersible ingredients by solubilizing and emulsifying a moisturizing ingredient, moisture retained when the moisturizing ingredient is in equilibrium with the atmosphere, and a lipophilic substance with a surfactant. Etc. are included.

  Water-soluble component content is 1-250% with respect to the weight of a nonwoven fabric base paper, Preferably it is 5-150%, More preferably, it is 10-100%. The water-soluble component content can be controlled by the amount of the moisturizing liquid applied to the nonwoven fabric base paper. If the water-soluble component content is less than 1%, the nonwoven fabric is felt hard. If it exceeds 250%, there is a sticky feeling. 10% to 50% is most preferable when the moisturizing nonwoven fabric is desired to be soft and smooth and smooth. When the moisturizing nonwoven fabric is moist and moisturizing effect is required, 50-100% is most preferable.

  The equilibrium moisture content increase rate when comparing the equilibrium moisture content of the moisturizing nonwoven fabric and the equilibrium moisture content when the water-soluble component is removed from the moisturizing nonwoven fabric is preferably 0.5 to 40%, more preferably 1.0 to 20%. 1.0% to 3.0% is most preferable when the moisturizing nonwoven fabric is required to be soft and smooth and smooth. When the moisturizing nonwoven fabric is moist and the moisturizing effect on the skin is required, 3.0 to 10% is most preferable. When the rate of increase in the equilibrium moisture content is 0.5% or less, the properties such as softness and moist feeling of the moisturizing nonwoven fabric are insufficient. When the equilibrium moisture content increase rate is 40% or more, the sticky feeling becomes strong, which is not preferable.

Furthermore, the moisture retention nonwoven fabric according to the present invention can have an F5 value per unit basis weight in the strongest direction of 0.40 N · m ² / g or less and a strength in the weakest direction of 1.0 N or more. A moisturizing non-woven fabric that satisfies this condition has a soft feel and is comfortable to use because it conforms to the hand and deforms during use, but has sufficient strength to withstand use.

The F5 value per unit weight in the strongest direction is 0.40 N · m ² / g or less, preferably 0.20 N · m ² / g or less, more preferably 0.15 N · m ² / g or less. When the F5 value per unit basis weight in the strongest direction is 0.40 N · m ² / g or more, the moisturizing nonwoven fabric feels stiff and feels stiff and uncomfortable.
The strength in the weakest direction is 1.0 N or more, preferably 2.0 N or more, more preferably 3.0 N or more. If the strength in the weakest direction is not 1.0 N or more, it will be broken at the time of use and the usability will be poor.

  Furthermore, the moisture retention nonwoven fabric according to the present invention has a water absorption of 0.03 to 2.50 ml / g per gram of the moisture retention nonwoven fabric after 5 seconds from the start of measurement in the Larose method, and the moisture retention rate is 3.0 or more. Can do. When you wipe the wet skin using a non-woven fabric that satisfies this condition, the moisture contained in the moisturizing non-woven fabric dissolves due to moisture in the skin, and an appropriate amount of the moisturizing component remains with the skin, so the skin feels moist , Moisturizing feel is strong.

  The amount of water absorption per gram of the moisturizing nonwoven fabric after 5 seconds from the start of measurement in the Larose method is 0.03 to 2.50 ml / g. 0.03 to 0.30 ml / g is preferable when emphasizing moisture retention on the skin during use, and 0.30 to 2.50 ml / g is preferable when emphasizing water absorption during use. When the amount of water absorption is 0.03 ml / g or less, there are many unwiped areas when wiping wet skin, and the feeling of use is poor. If the amount of water absorption is 2.50 ml / g or more, the amount of wiping residue is excessively reduced, and the moisturizing component retained by the moisturizing nonwoven fabric becomes difficult to transfer to the skin, leaving a moist and moisturizing feeling on the skin.

  The water retention rate is preferably 3.0 or more, more preferably 4.0 or more. When the moisture retention is 3.0 or less, the moisture becomes saturated as soon as the wet skin is wiped, and the function as a wiping sheet is not achieved.

Furthermore, the moisture retention nonwoven fabric according to the present invention can have a bending resistance per unit basis weight of 5.0 mN · m ² / g or less in the direction where the bending resistance is the largest in the handle O meter. Further, the bending resistance per unit weight in the direction in which the bending resistance is the largest in the cantilever method can be 1.5 mm · m ² / g or less. A moisturizing non-woven fabric that satisfies this condition is supple, flexible and draped.

The bending resistance per unit weight in the direction of the largest bending resistance in the handle O-meter is 5.0 mN · m ² / g or less, preferably 4.0 mN · m ² / g or less. In the cantilever method, the bending resistance per unit weight in the direction with the largest bending resistance is preferably 1.5 mm · m ² / g or less. Moisturizing non-woven fabrics that do not satisfy these conditions are bent and hard and feel awkward when used.

The drape coefficient is 68% or less, preferably 65% or less, more preferably 60% or less. It is supple that the drape coefficient is 68% or less, has good along-skin properties, and is easily deformed along the hand when used as a wiper.

The KES bending stiffness B value is 0.20 gf · cm ² / cm or less, preferably 0.15 gf · cm ² / cm or less, more preferably 0.10 gf · cm ² / cm or less in the direction in which the B value is the largest. It is desirable to be. When the KES bending stiffness B value in the largest direction is 0.20 gf · cm ² / cm or less, the moisturizing nonwoven fabric feels soft and flexible. Even when used as a wiper, there is no feeling of tingling.

  The KES shear stiffness G value is 2.00 g / cm · degree or less, preferably 1.50 g / cm · degree or less, more preferably 1.30 g / cm · degree or less, in the direction of the largest G value. The KES shear rigidity G value is a value indicating the stress when a shearing force is applied to the nonwoven fabric, and if the G value is small, it leads to bending softness and good along-skin properties. When the KES shear stiffness G value in the largest direction is 2.00 g / cm · degree or less, the moisturizing nonwoven fabric feels soft, and even when used as a wiper, it does not feel irritating.

  Furthermore, the moisture retention nonwoven fabric according to the present invention can have an MIU value of 0.45 or less by a friction tester. Touching a moisturizing nonwoven fabric that satisfies this condition will feel smooth. A moisturizing nonwoven fabric having an MIU value of 0.45 or more does not feel smooth when the surface is touched.

Furthermore, the moisture retention nonwoven fabric according to the present invention can have an initial heat flux maximum value Qmax of 0.08 to 0.30 J / cm ² / sec.

The initial heat flux maximum value Qmax is preferably 0.09 to 0.20 J / cm ² / sec. 0.09 to 0.115 J / cm ² / sec is most preferable when the moisturizing nonwoven fabric is desired to be soft and smooth and smooth. When the moisturizing nonwoven fabric is moist and moisturizing effect is required, 0.115 to 0.20 is most preferable. When Qmax is 0.08 J / cm ² / sec or less, no moist feeling is felt. When Qmax is 0.30 J / cm ² / sec or more, it feels cold when touched.

  Conventional nonwoven fabric manufacturing techniques can be employed for the production of the nonwoven fabric before carrying the water-soluble component, that is, the nonwoven fabric base paper.

  Specific examples include a spunlace method, a spunbond method, a wet method, an air laid method, a chemical bond method, and a melt blow method. These production methods can be combined to produce. A spunlace method in which fibers are entangled with water and the fibers are loosely bonded is a preferred manufacturing technique. Among these, a spunlace nonwoven fabric containing cellulosic fibers such as pulp and rayon is more preferable because it has good water absorption and a moist feeling.

The basis weight of the nonwoven fabric base paper can be set to 20 to 100 g / m ² . When pliability, drapeability, etc. are important, such as the use of wiping fine parts such as around the eyes, it is preferably 30 to 60 g / m ² , more preferably 40 to 50 g / m ² . On the other hand, when high water absorption, strength, etc. are important, such as for wiping the entire body, it is 40 to 100 g / m ² , more preferably 50 to 80 g / m ² .

  The water-soluble component can be supported on the nonwoven fabric by applying a moisturizing liquid to the nonwoven fabric base paper. The moisturizing liquid can contain a moisturizing component, water, oils, a surfactant for dispersing the oils in the moisturizing liquid, and the like. If the coating is carried out with the moisture content in the moisturizing liquid adjusted to be close to the equilibrium moisture content of the moisturizing liquid, the drying and humidity conditioning steps after coating can be omitted, which is economical.

  Moisturizing ingredients are substances that have a high moisture retention capacity. Specific examples thereof include glycerin, diglycerin, polyglycerin, ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, 1,3-butylene glycol, sorbit, xylitol, and erythritol. , Mannitol, lactitol, oligosaccharide alcohol, maltitol, reduced starch hydrolyzate, fructose, glucose, oligosaccharide, trehalose, glycine betaine, pyrrolidone carboxylic acid, pyrrolidone carboxylate, hyaluronic acid, hyaluronate, lactic acid, lactate And urea.

  Glycerin is suitable in terms of hygroscopicity, cost, and safety. In addition, sorbitol has a lower hygroscopicity than glycerin, but has a high ability to retain the moisture once taken in, and when used in combination with glycerin, the effect of buffering the moisture change of the moisturizing nonwoven fabric accompanying the change in environmental humidity can be obtained.

  Specific examples of oils include hydrocarbons such as liquid paraffin and squalane, olive oil, camellia oil, castor oil, soybean oil, palm oil, beef tallow, tri (caprylic acid / capric acid) glycerin, glycerin tricaprylate, etc. Examples include fats and oils, ester oils such as isopropyl myristate, isopropyl palmitate, and cetyl octanoate.

  The more oils, the better the transferability to the skin.

Moisture contained in the moisturizing nonwoven fabric is moisture retained by the moisture retention of the moisturizing component and the nonwoven fabric base paper. That is, it is moisture in equilibrium with moisture contained in the air in the environment where the moisturizing nonwoven fabric is placed. It is essentially different from a product such as wet tissue that contains 200% or more moisture with respect to the weight of the nonwoven fabric and requires a package that prevents drying. However, for the purpose of maintaining hygiene and maintaining a moist feeling, it is possible to perform sealed packaging, and further to package with a high or low moisture content. The moisture content of the packaged moisturizing nonwoven fabric is preferably an equilibrium moisture content at 23 ° C. and 50% RH + 40% or less, more preferably an equilibrium moisture content at 23 ° C. and 50% RH + 20% or less, and 23 ° C. Most preferably, the equilibrium moisture content at 50% RH is 10% or less.
The method of applying the moisturizing liquid to the non-woven base paper can be selected from ordinary coating methods such as gravure coating, spray coating, die coating and dipping. Although single-sided coating may be used, double-sided coating is preferable in order to make the front and back of the nonwoven fabric even.

  The moisturizing nonwoven fabric according to the present invention suppresses moisture absorption and moisture absorption time from the environment, thereby suppressing an increase in the water activity value of the moisturizing nonwoven fabric of the contents and preventing the appearance of fungi-like environments. In practical use, the product can be free from mold and the like. Thereby, the moisturizing nonwoven fabric package according to the present invention can be a safe product for the human body without blending a preservative such as a fungicide. Moreover, stability of the moisture retention nonwoven fabric package concerning this invention can be improved by specifying the material of a film.

  Hereinafter, embodiments of a moisturizing nonwoven fabric according to the present invention will be described in detail with reference to the drawings.

  First, the moisturizing nonwoven fabric stored in the packaging container will be described.

(Manufacture of non-woven fabric)
Softwood kraft pulp (Howsand 400 manufactured by Canford) was disaggregated with a pulper, and a pulp paper having a basis weight of 30 g / m ² was produced by a circular net paper machine. Rayon fiber (1.1 dtex 38 mm) was defibrated with two card machines to produce a pair of fiber webs with a basis weight of 10 g / m ² . The pulp sheet was sandwiched between a pair of fiber webs and supplied to a conveyor belt. The entanglement integration process was performed with a water jet processing device disposed in the travel path of the conveyor belt, to obtain a spunlace nonwoven fabric containing pulp having a basis weight of 52.4 g / m ² . The water jet treatment was performed at a water pressure of 4.5 MPa using a nozzle having a pore diameter of 80 μm.

(Moisturizing process)
A moisturizing treatment solution was applied to the nonwoven fabric thus obtained by a gravure coating method. After coating, the sample was allowed to stand for 24 hours in a standard state at a temperature of 23 ° C. and a humidity of 50% to adjust the humidity. Thereafter, the basis weight of the moisturizing nonwoven fabric was measured to be 74.4 g / m ² . That is, the moisture retention rate is 41.9%.

(Moisturizing liquid)
The moisturizing solution is 60 parts by weight of glycerin, 10 parts by weight of sorbitol, 1 part by weight of decaglycerin monostearate, 5 parts by weight of liquid paraffin, 1 part by weight of polyoxyethylene (20EO) sorbitan monostearate, 0 part of sorbitan monostearate. The formulation was 4 parts by weight and 22.6 parts by weight of water.

(Moisturizing non-woven packaging)
The moisturizing nonwoven fabric obtained as described above is housed in each packaging container as shown in FIGS. 1 to 7 and allowed to stand for 24 hours in a standard state at a temperature of 23 ° C. and a relative humidity of 50%. The moisture activity value of the moisturizing nonwoven fabric is kept at 0.70 or less when left in an environment with a relative humidity of 85% for 3 hours.

  The packaging container 1 shown in FIGS. 1 and 2 has a double structure of a synthetic resin film 2 and paper 3 such as cardboard, the container shape is a box shape, and the paper 3 has a perforation cut out. The lid 5 can be opened by cutting 4. The synthetic resin film 2 positioned below the lid 5 is provided with a take-out port 6 having a slit structure, and the moisturizing nonwoven fabric 7 stored in the container can be taken out from the take-out port 6.

  The packaging container 1 shown in FIGS. 3 and 4 is made by laminating a synthetic resin film 2 and a paper 3 (laminated with a synthetic resin film on the paper 3), and the container shape is a box shape. The lid 5 can be opened by cutting out the cut-out portion 4 as the eye. And by making this lid | cover 5 into the open state, the moisturizing nonwoven fabric 7 accommodated in the container can be taken out. Furthermore, the lid 5 has a structure in which the end portion 5a can be inserted into the insertion portion 8 provided in the packaging container 1 in a closed state. Therefore, the packaging container 1 can be kept in a closed state after the lid 5 is once opened.

As a reference example, the packaging container 1 shown in FIG. 5 is made of paper 3 such as cardboard, the container shape is a box shape, and the opening 9 is provided in the upper part of the container. The opening 9 is provided with a take-out port 6 having a structure in which the synthetic resin films 2 are superposed, and the moisturizing nonwoven fabric 7 stored in the container can be taken out from the take-out port 6.

As a reference example, the packaging container 1 shown in FIG. 6 is made of a synthetic resin film 2 and is formed in a bag shape so that it can be opened by cutting the upper perforated cutout 4. ing. And the moisture retention nonwoven fabric 7 accommodated in the container can be taken out from the opening of the packaging container 1.

  The packaging container 1 shown in FIG. 7 is made of paper 3 such as cardboard, and the shape of the container is a box shape so that the lid 5 can be opened by cutting out the cut portion 4 having perforations. I have to.

( Reference Example 1, Example 2, Reference Examples 3-7 )
Reference Example 1 is a packaging container 1 as shown in FIGS. 1 and 2, wherein the packaging container 1 is made of a synthetic resin film (polyethylene film having a thickness of 40 μm) and paper (360 g / m 2 uncoated white cardboard). The water vapor transmission rate is 0 g / m 2 · h. And in the unopened state, the said moisture activity value of the moisture retention nonwoven fabric 7 accommodated in the said packaging container 1 shall be hold | maintained at 0.50.

In Example 2, a packaging container 1 as shown in FIGS. 3 and 4 is bonded to a synthetic resin film (PET film having a thickness of 25 μm) and paper (360 g / m ² uncoated white cardboard). (The synthetic resin film is laminated on paper), and the moisture permeability is 3 g / m ² · h. And in the unopened state, the said moisture activity value of the moisture retention nonwoven fabric 7 accommodated in the said packaging container 1 shall be hold | maintained at 0.53.

In Reference Example 3 , in the packaging container 1 as shown in FIG. 7, the packaging container 1 is made of paper (860 g / m ² uncoated white cardboard), and the moisture permeability is 10 g / m ^2.・ It is set to h. And in the unopened state, the said moisture activity value of the moisture retention nonwoven fabric 7 accommodated in the said packaging container 1 shall be hold | maintained at 0.60.

In Reference Example 4 , in the packaging container 1 as shown in FIG. 7, the packaging container 1 is made of paper (580 g / m ² uncoated white cardboard), and its moisture permeability is 20 g / m ^2.・ It is set to h. And in the unopened state, the said water activity value of the moisture retention nonwoven fabric 7 accommodated in the said packaging container 1 shall be hold | maintained at 0.66.

In Reference Example 5 , in the packaging container 1 as shown in FIG. 7, the packaging container 1 is made of paper (450 g / m ² coated white cardboard), and its moisture permeability is 42 g / m ^2. h. And in the unopened state, the said water activity value of the moisture retention nonwoven fabric 7 accommodated in the said packaging container 1 shall be hold | maintained at 0.69.

In Reference Example 6 , in the packaging container 1 as shown in FIG. 6, the packaging container 1 is made of a polyethylene film having a thickness of 40 μm, and the moisture permeability is set to 0 g / m 2 · h. And in the unopened state, the said moisture activity value of the moisture retention nonwoven fabric 7 accommodated in the said packaging container 1 shall be hold | maintained at 0.50.

In Reference Example 7, the packaging container 1 of Reference Example 1 is once opened and then the lid is closed, and the moisture activity value of the moisturizing nonwoven fabric 7 stored in the packaging container 1 is set in an unopened state. It is assumed that 0.50 to 0.58.

  In Example 8, the packaging container 1 of Example 2 was once opened and then the lid was closed, and the water activity value of the moisturizing nonwoven fabric 7 accommodated in the packaging container 1 was not opened. It is assumed that 0.53 to 0.62.

(Comparative Examples 1-6)
Comparative Example 1 is made of paper (360 g / m ² uncoated white cardboard) made of a material used in a commercially available tissue paper carton in a packaging container as shown in FIG. 7, and its moisture permeability is 67 g. / M ² · h. And in the unopened state, the said moisture activity value of the moisture retention nonwoven fabric accommodated in the said packaging container shall be hold | maintained at 0.76.

In Comparative Example 2, the material of the packaging container as shown in FIG. 7 is made of paper (230 g / m ² drawing paper), and the moisture permeability is 148 g / m ² · h. And in the unopened state, the said moisture activity value of the moisture retention nonwoven fabric accommodated in the said packaging container shall be hold | maintained at 0.84.

  In Comparative Example 3, the moisturizing nonwoven fabric is not stored in the packaging container but left as it is. And the said water activity value of the moisture retention nonwoven fabric of the stationary state shall be 0.85.

  In Comparative Example 4, a mildewproofing agent (mixed with 0.05 part by weight of isopropyl paraoxybenzoate in 100 parts by weight of the moisturizing liquid in the above example) was added to the packaging container of Comparative Example 1, The moisture and moisture activity values of the moisturizing nonwoven fabric are the same as in Comparative Example 1.

In Comparative Example 5, the packaging container of Reference Example 5 was opened, and the moisture activity value of the moisturizing nonwoven fabric stored in the packaging container was changed from 0.69 to 0.77 in an unopened state. Yes.

  The comparative example 6 cuts off the cover of the packaging container of the comparative example 1, and made it the opened state, and the said moisture activity value of the moisturizing nonwoven fabric accommodated in this packaging container is 0.76 to 0.81 of the unopened state. It is assumed that

  The moisture permeability of the packaging container and the moisture activity value of the moisturizing nonwoven fabric were measured as follows. Further, the mold generation test of the moisturizing nonwoven fabric stored in the packaging container was also performed as follows.

<Measurement method>
1. Moisture permeability The moisture permeability of a packaging container is based on the moisture permeability test method JIS L 1099 (water method A-2) of a textile product.
2. Water activity value 1) The moisturizing nonwoven fabric stored in the packaging container is allowed to stand for 24 hours in a standard state at a temperature of 23 ° C. and a relative humidity of 50%.
2) Let stand for 3 hours in a thermo-hygrostat adjusted to a temperature of 23 ° C. and a relative humidity of 85%. At this time, it is placed at a position where the wind speed of about 1 cm above the moisturizing nonwoven fabric does not exceed 0.8 m / s.
3) The moisture activity value of the moisturizing nonwoven fabric facing the packaging container of the contents is measured by a moisture activity measuring device: portable moisture activity meter, Pawkit (Inex).

<Mold generation test>
The moisturizing nonwoven fabric was allowed to stand simultaneously under the following conditions, and the number of days until the occurrence of mold was observed on the surface of the moisturizing nonwoven fabric was examined.
1) Accelerated test: The sample was allowed to stand in a sealed container under conditions of a temperature of 20 ± 5 ° C., a humidity of 95 ± 2%, and up to 80 days, and the contents were observed every 10 days.
2) Long-term storage test: A sample is allowed to stand indoors without temperature and humidity adjustment equipment under conditions of a temperature of 5 to 36 ° C, a humidity of 20 to 86%, and up to 12 months. Observed.

<Influence test of chemicals on film material>
1) Test method: 0.1 g of the moisturizing treatment solution is placed on a film, and the same film is placed on the film and allowed to stand, and the surface of the film after a certain period is observed.
“X” indicates that erosion is observed, “△” indicates that erosion is slightly observed, and “○” indicates that erosion is not observed.
2) Test conditions: left for 9 days at a temperature of 40 ° C. and a relative humidity of 75%.
3) Chemical solution: The above moisturizing treatment liquid, liquid paraffin

<Performance test>
Samples were conditioned in a 23 ° C., 50% RH environment according to JIS P8111 (paper, paperboard and pulp—standard conditions for humidity conditioning and testing).
(Weight)
JIS L1913 (General Short Fiber Nonwoven Fabric Test Method) Mass per unit area was taken as the basis weight.

(Water-soluble component content)
The measurement was performed according to the following procedure.
Humidity of five samples cut to a size of 100 mm × 100 mm is measured in a standard state (23 ° C., 50%) and the weight is measured (the weight is A. That is, A = (weight of non-woven fiber) + (Equilibrated moisture weight of non-woven fiber) + (Moisturizing component weight) + (Equilibrated moisture weight of moisturizing component)). The sample is washed with stirring in 2 L of distilled water at 60 ° C. for 10 minutes, and the sample water is sufficiently drained. (If there is a fallen fiber, filter using filter paper, and add the fallen fiber to the weight B of the nonwoven fabric sample by operating in the same manner as the nonwoven fabric sample.) Dry for 3 hours using a hot air dryer at 105 ° C. Then, the humidity is adjusted again in the standard state (23 ° C., 50%) and the weight is measured (the weight is defined as B. That is, B = (weight of the nonwoven fiber) + (equilibrium moisture weight of the nonwoven fiber)) . At this time, the water-soluble component content is calculated by the following formula.
Water-soluble component content (%) = (A−B) ÷ B × 100

(Equilibrium moisture content)
Measured by the following procedure with reference to JIS P8127 (paper and paperboard-moisture test method-method using a dryer).
Five samples cut to a size of 100 mm × 100 mm are conditioned in a standard state (23 ° C., 50%) and the weight is measured (the weight is A). The sample is put into a weighing bottle (a cylindrical bottle having a barrel diameter of 60 mm and a height of 80 mm is used), the lid is closed, and the weight is measured (the weight is defined as B). Open the lid of the weighing bottle, put it in a hot air dryer at 105 ° C for 3 hours to dry, close the lid of the weighing bottle, cool to 23 ° C in a desiccator, and measure the weight (the weight is C and To do). At this time, the equilibrium moisture content is calculated by the following equation.
Equilibrium moisture content (%) = (BC) ÷ A × 100

(Equilibrium moisture content increase rate)
Using the above method, measure the equilibrium moisture content of the moisturized nonwoven fabric and the equilibrium moisture content of the nonwoven fabric (nonwoven fabric before moisturizing) when water-soluble components are removed from the moisturized nonwoven fabric. did.
Equilibrium moisture content increase rate (%) = (Equilibrium moisture content of moisturizing nonwoven fabric)-(Equilibrium moisture content when water-soluble components are removed from moisturizing nonwoven fabric)

(Strong elongation measurement)
It measured according to JIS L1913 (general short fiber nonwoven fabric test method). However, the test was performed at a sample width of 50 mm, a gripping interval of 100 mm, and a tensile speed of 300 mm / min. For the F5 value, the stress when the sample was stretched by 5% was measured.

(Water absorption)
The water absorption at the time of 5 seconds, 10 seconds, and saturation was measured from the start of the test by the Larose method. The water absorption per gram of sample was calculated by dividing the water absorption by the sample weight.

(Water retention rate)
The water retention rate was measured by the following method.
The sample is cut into a size of 100 mm × 100 mm, and the weight after conditioning in a standard state (23 ° C., 50%) is measured (the weight is A). The sample is immersed in distilled water in a vat for 60 seconds, then left on a wire mesh with an inclination angle of 30 ° for 60 seconds, and is quickly placed on a scale and its weight is measured (B is the weight). At this time, the water retention rate is calculated by the following equation.
Water retention rate = (B-A) / A

(Flexibility)
JIS L1096 (General Textile Test Method) Bending / softening property Measured according to each of A method (45 ° cantilever method), E method (handle O meter method), and G method (drape coefficient). However, in the E method, the sample size was set to 100 mm × 100 mm, and the measurement was performed at the center position of the sample. The slit width was 10 mm.

(KES surface test)
It was measured by Kato Tech Co., Ltd. KES SE friction tester. A friction element (a silicone sensor for KES SE manufactured by Kato Tech Co., Ltd.) having a silicone rubber on the surface of the friction element was used. The measurement was performed with a contact area of the friction element of 1 cm ² , a load of 25 gf / cm ² , and a sample stage moving speed of 1 mm / sec. The back and front surfaces of each sample were measured in the vertical direction and the horizontal direction, and all data were averaged.

(KES pure bending test)
The bending stiffness B and the bending hysteresis width 2HB were measured with a Kato Tech Co., Ltd. KES FB2 pure bending tester. The sample width was 200 mm and the measurement was performed under standard high sensitivity conditions. When the sample size is smaller than 200 mm, measurement may be performed with a sample width of 100 mm.

(KES shear test)
The shear stiffness G and the hysteresis width 2HG at a shear of 0.5 ° were measured by a Kato Tech Co., Ltd. KES FB1 shear tester. The sample width was 200 mm and the measurement was performed under standard high sensitivity conditions.

(Initial heat flux maximum value Qmax)
Qmax was measured by Kato Tech Co., Ltd. KES F7 THERMO LABO. The sample temperature was 20 ° C., the initial copper plate temperature was 30 ° C., and the contact pressure was 10 gf / cm ² . Measurement was performed on the front and back surfaces, and the data was averaged.

<Result>
As shown in Table 1, Table 2, and Table 3 below.

<Evaluation>
(If not opened)
In any of Reference Example 1, Example 2, and Reference Examples 3 to 6, generation of mold was not observed in the 80-day accelerated test and the 12-month long-term storage test.

In Reference Example 4, generation of fungi was observed on day 70 in an accelerated test, in Reference Example 5, the occurrence of mold was observed on day 60 in an accelerated test, in any of Reference Example 4 and 5, Mold generation was not observed in the long-term storage test.

  In Comparative Example 1, generation of mold was observed in 40 days in the accelerated test and in 12 months in the long-term storage test.

  Since Comparative Example 2 was a material having higher moisture permeability than Comparative Example 1, mold generation was observed in the accelerated test for 30 days and in the long-term storage test in the 10th month, and mold generation was earlier than Comparative Example 1. It was.

  In Comparative Example 3, the moisturizing non-woven fabric was left as it was without being stored in the packaging container. However, generation of mold was observed in the acceleration test on the 20th day, and in the long-term storage test on the 8th month. Mold generation was the fastest because it was received directly.

Since Comparative Example 4 contains a fungicidal agent in Comparative Example 1, generation of mold was observed on the 50th day in the accelerated test, but generation of mold was not observed in the long-term storage test. Compared with Example 1, the occurrence of mold was suppressed. Even if this Comparative Example 4 is compared with Reference Example 1, Example 2, and Reference Examples 3 to 6 , it can be said that suppressing the water activity value of the moisturizing nonwoven fabric has an effect equal to or greater than the addition of the fungicide. all right.

(When reopened after opening)
In Reference Example 7, the packaging container of Reference Example 1 was opened and then resealed with a lid. However, since the sealing performance was lowered, the moisture activity value of the moisturizing nonwoven fabric was 0.50 to 0 when unopened. Increased to .58. However, no mold was observed in either the accelerated test or the long-term storage test.

  In Example 8, the packaging container of Example 2 was opened and then resealed with a lid. However, since the sealing performance was lowered, the moisture activity value of the moisturizing nonwoven fabric was 0.53 to 0 when unopened. Increased to .62. However, no mold was observed in either the accelerated test or the long-term storage test.

In Comparative Example 5, the packaging container of Reference Example 5 was opened and then re-sealed with a lid, but the moisture activity value of the moisturizing nonwoven fabric increased from 0.69 when unopened to 0.77. Molding was observed on the 30th day in the accelerated test and in the 12th month in the long-term storage test.

  In Comparative Example 6, the packaging container of Comparative Example 1 was opened and then sealed and resealed, but the moisture activity value of the moisturizing nonwoven increased from 0.76 when unopened to 0.81, and accelerated. Molding was observed on the 30th day in the test and in 11 months in the long-term storage test, which was faster than unopened.

Based on the above evaluations, preservatives such as antifungal agents are added if the moisture activity value of the moisturizing nonwoven fabric is suppressed to 0.70 or less, whether it is an unopened packaging container or a packaging container resealed after opening. However, it is clear that the possibility of mold generation can be reduced in practice.
The film used for the packaging container is hardly affected by oil, LDPE (low density polyethylene), PET (polyethylene terephthalate), LLDPE (linear low density polyethylene), OP (stretched polypropylene), VMPET (aluminum-deposited polyethylene terephthalate) The laminated film of PET / LLDPE, OP / CPP, and PET / VMPET / LLDPE is even better.

It is the perspective view of the state of the 1st reference form of the moisture retention nonwoven fabric packaging body of this invention, and the unopened state. It is the perspective view of the state which showed the 1st reference form of the moisture retention nonwoven fabric package of this invention, and was opened. The 2nd embodiment of the moisturizing nonwoven fabric packaging body of this invention is shown, and it is a perspective view of the unopened state. It is a perspective view of the opened state which shows 2nd embodiment of the moisture retention nonwoven fabric packaging body of this invention. It is a perspective view which shows the 3rd reference form of the moisture retention nonwoven fabric package of this invention. It is a perspective view which shows the 4th reference form of the moisture retention nonwoven fabric packaging body of this invention. It is a perspective view which shows the 5th reference form of the moisture retention nonwoven fabric packaging body of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packaging container 2 Synthetic resin film 3 Paper sheet 6 Outlet 7 Moisturizing nonwoven fabric

Claims (8)

A moisturizing non-woven fabric package in which a moisturizing non-woven fabric coated with a moisturizing treatment liquid is packaged in a non-woven fabric, and after standing for 24 hours in a standard state at a temperature of 23 ° C. and a relative humidity of 50%, When left in an environment with a relative humidity of 85% for 3 hours, a water-soluble component is contained in an amount of 5 to 150% based on the weight of the nonwoven fabric base sheet, and the moisture activity value of the moisturizing nonwoven fabric stored in the packaging container is 0.53. ~ 0.70, the packaging container is box-shaped, and a synthetic resin film or sheet having erosion resistance to the moisturizing treatment liquid is laminated with paper, or has a double structure with paper. Monodea is, moisturizing nonwoven packaging body and having a moisture permeability.   2. The moisturizing nonwoven fabric package according to claim 1, wherein the packaging container has a structure in which a lid is closed, and the lid is opened once and then can be closed.   2. The moisture retention according to claim 1, wherein the take-out port of the packaging container has a slit structure or a superposed structure with a synthetic resin film or sheet, and the moisturizing nonwoven fabric stored in the container can be taken out from the take-out port. Non-woven package. The moisture retention nonwoven fabric package according to any one of claims 1 to 3, wherein a moisture permeability according to JIS-L 1099 (A-2 method) of the material of the packaging container is 42 g / m ² · h or less. . The moisturizing nonwoven fabric package according to any one of claims 1 to 3, wherein a material of the synthetic resin film or sheet includes one of stretched polypropylene, polyethylene terephthalate, and polyethylene . The moisture-containing nonwoven fabric package according to any one of claims 1 to 5 , wherein the moisture contained in the moisture-holding nonwoven fabric is moisture absorbed and held by a moisture-retaining component or nonwoven fabric fibers . A moisture retaining nonwoven fabric containing 5 to 150% of a water-soluble component with respect to the weight of the nonwoven fabric base paper, when the equilibrium moisture content of the moisture retaining nonwoven fabric is compared with the equilibrium moisture content when water soluble components are removed from the moisture retaining nonwoven fabric. 7. The moisture retention nonwoven fabric package according to any one of claims 1 to 6, wherein the rate of increase in equilibrium moisture content is 0.5 to 40% . The fiber which comprises the said moisture retention nonwoven fabric contains at least any one of a pulp or rayon, The moisture retention nonwoven fabric package in any one of Claims 1-7 characterized by the above-mentioned.

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