JP2015188595A - Head shield cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head shield cover which covers the whole head at a time of sleep to suitably keep heat and moisture of the head such that a comfortable sleep environment can be obtained, and which is capable of easily imparting shieldability suitable for sleep.SOLUTION: The head shield cover is formed of a nonwoven fabric that is obtained by applying a water dispersion organic polymer and a pigment to a raw fabric sheet, the raw fabric sheet comprising at least wood pulp and organic fiber and being made into paper by a wet-type paper-making method.

Description

  The present invention relates to a head shielding cover used during sleep.

  Conventionally, when a person sleeps or takes a nap in a place where the temperature is low or where the humidity is low, the person sleeps lightly or becomes easily infected with a cold or flu.

  In an environment where the temperature is low, people wear thick clothes or wear futons to prevent a decrease in body temperature, or warm and humidify the room for sleeping and taking a nap to improve the sleeping environment. Devise measures to prevent colds and flu.

  However, in order to make the environment suitable for sleep and nap by such a method, for example, a method of wearing thick clothes or wearing a futon is suitable for maintaining body temperature, but adjusting the humidity. I can't. Also, in the method of raising the room temperature or humidifying, the amount of energy normally used per person increases to warm or humidify the entire room, leading to waste of energy.

  For example, when sleeping or taking a nap while wearing a mask while wearing a mask or wearing a futon, the breathing air is humidified and the ambient temperature around the body is maintained comfortably. However, when a mask is worn during sleep, the amount of air permeation is slightly reduced, which makes it difficult to breathe and makes it difficult to sleep. Furthermore, for example, when sleeping or taking a nap on an airplane or train, the sleeping face can be seen in the surroundings, and some people feel this uncomfortable.

  In order to solve this problem, Japanese Utility Model Registration No. 3174402 (Patent Document 1) proposes a nonwoven fabric or paper head shielding cover that covers the entire head. According to this method, the person does not feel stuffy like a mask and the sleeping face is not seen around.

  However, with regard to the head covering cover that covers the entire head, depending on the material of the nonwoven fabric or paper, the breathability is too low to feel breathless, or conversely, the breathability is too high to obtain a heat retaining and moisturizing effect. I can't. Furthermore, if the head shielding cover is too soft, there is a problem that when the head shielding cover is attached to the head, it hangs down on the face and is uncomfortable.

  In addition, when sleeping or taking a nap on an airplane, the head shielding cover is designed so that the brightness inside the head shielding cover can be made suitable for sleep in order to reduce the burden caused by the time difference of the user. It has been desired to impart light-shielding properties.

Utility Model Registration No. 3174402

  An object of the present invention is to provide a head shielding cover that covers the entire head during sleep so as to keep the head moderately moisturized and obtain a comfortable sleeping environment. Moreover, it is providing the head shielding cover which can provide easily the light-shielding property suitable for sleep.

The above object of the present invention has been achieved by the following invention.
(1) A head shielding cover comprising at least a wood pulp and an organic fiber, and comprising a non-woven fabric obtained by adding a water-dispersed organic polymer and a pigment to a raw cloth sheet made by wet papermaking.

  By using the cover of the present invention, there is no breathlessness, the head can be kept warm and moist, and a comfortable sleep environment can be obtained. In addition, it is possible to provide a head shielding cover that can easily impart light shielding properties suitable for sleep.

  The nonwoven fabric used for the head shielding cover of the present invention will be described. The nonwoven fabric used for the head shielding cover of the present invention is made of wood pulp and organic fibers and is manufactured by a wet papermaking method. The wood pulp used in the present invention is not limited to NBKP, LBKP, NBSP, LBSP, or any other type of pulp, but NBKP is preferred from the viewpoint of packing and strength. The freeness is not particularly limited but is preferably 100 ml or more. If the freeness is less than 100 ml, clogging may occur at the stage of forming the raw cloth sheet by the wet papermaking method, which may result in poor drainage, and it is difficult to obtain a uniform texture. There may not be.

  Organic fibers other than wood pulp used in the nonwoven fabric used for the head shielding cover of the present invention are polyethylene terephthalate, polybutylene terephthalate, polypropylene, polyethylene, polystyrene or modified polymers and copolymers of these polymers, acrylic fibers, polyacrylonitrile fibers, Examples thereof include fibers obtained by spinning polyvinyl alcohol fiber, nylon fiber, urethane fiber, rayon fiber, regenerated cellulose fiber, solvent-spun cellulose fiber, collagen, alginic acid, chitin and the like in solution.

  These organic fibers are used by mixing with wood pulp. The organic fiber has a weaving degree (fiber diameter) of preferably 0.1 to 6.0 dtex, more preferably 0.6 to 3.3 dtex. If the weaving degree is thinner than 0.1 dtex, the paper-making property tends to be poor and the texture tends to be poor, resulting in an increase in cost. On the other hand, if it is thicker than 6.0 decitex, the smoothness becomes worse, and it may be difficult to adjust the brightness inside the cover. The fiber length is preferably 2 to 20 mm, more preferably 3 to 10 mm. If the fiber length is 2 mm or less, the fiber is likely to come out of the wire by wet papermaking, resulting in a decrease in yield. On the other hand, if the fiber length exceeds 20 mm, clogging on the screen may occur.

  Further, as other fibers, in addition to cotton pulp, wall pulp, bamboo pulp, esparto pulp, bagasse pulp, hemp pulp, inorganic fibers such as glass fiber and carbon fiber may be used. In that case, the ratio of these other fibers is preferably 10% by mass or less based on the total mass of the above-described wood pulp, organic fibers, and these fibers.

  As a manufacturing method of the base fabric sheet in the nonwoven fabric used for the head shielding cover of the present invention, a wet papermaking method capable of obtaining a uniform texture is preferable. In the wet papermaking method, organic fibers other than wood pulp are used alone or in combination, mixed with wood pulp and dispersed in water to adjust the slurry. The slurry is made using a long net, a circular net, or an inclined wire type paper machine.

  As a chemical compounded during papermaking, an internal sizing agent may be used in order to stabilize peeling from a wet strength agent or a Yankee dryer as a measure against paper breakage in a wet paper state.

  As a fiber which forms a base fabric sheet, it is preferable that wood pulp / organic fiber is a ratio of 10/90 to 80/20 by mass ratio. Wood pulp exhibits the effect of improving the strength of the raw fabric sheet using hydrogen bonding. In addition, organic fibers other than wood pulp develop a cloth-like texture and improve air permeability. By mixing wood pulp and organic fibers at the above mass ratio, it is possible to obtain a head shielding cover having excellent strength while having a cloth-like texture.

  The nonwoven fabric used for the head shielding cover of the present invention can easily adjust the brightness inside the cover by adding a water-dispersed organic polymer and a pigment to the above-described raw cloth sheet. The brightness inside the cover can be adjusted by printing an arbitrary pattern on the nonwoven fabric constituting the head shielding cover and imparting a light shielding property to transmitted light. The non-woven fabric used in the above method can retain a sufficient amount of ink by sufficiently applying the water-dispersed organic polymer and pigment described above to the base fabric sheet, and can sufficiently block transmitted light.

  Examples of the water-dispersed organic polymer used in the nonwoven fabric used in the head shielding cover of the present invention include acrylate polymer, ethylene acetate polymer, methyl methacrylate latex, styrene butadiene latex, and acrylonitrile butadiene latex. Although not particularly limited, it is preferable to use an acrylate copolymer or the like in consideration of the shielding property and texture of transmitted light, air permeability, and the like.

  In the present invention, the pigment further improves the shielding property of transmitted light that could not be obtained only with the water-dispersed organic polymer. Examples of the pigment include calcium carbonate, silica, titanium oxide, and satin white. Calcium is more preferred. The particle diameter of these pigments is preferably 50 μm or less, more preferably 20 μm or less in order to improve the smoothness of the nonwoven fabric. When the pigment particle diameter exceeds 50 μm, the pigment may settle in the mixed liquid of the water-dispersed organic polymer and the pigment to deteriorate the coating property, and the uniform surface property may not be maintained.

  The mass ratio of the water-dispersed organic polymer / pigment is preferably 20/80 to 95/5, more preferably 30/70 to 80/20. When the mass ratio of the water-dispersed organic polymer is lower than 20/80, the fiber adhesiveness of the sheet surface and the adhesiveness of the pigment are lowered, which may cause the fibers and the pigment to be easily detached. Moreover, when the mass ratio of the water-dispersed organic polymer exceeds 95/5, the transmitted light may not be sufficiently blocked.

  In the nonwoven fabric used for the head shielding cover of the present invention, the adhesion amount of the water-dispersed organic polymer and the pigment is preferably 20 to 60%, more preferably 25 to 50% of the total mass of the nonwoven fabric. If the adhesion amount is lower than 20%, the transmitted light may not be sufficiently shielded. On the other hand, if it exceeds 60%, the fabric-like texture unique to the nonwoven fabric may be impaired due to adhesion of the water-dispersed organic polymer, and air permeability may be deteriorated.

  The method for applying the mixed liquid of these water-dispersed organic polymer and pigment to the base fabric sheet is not particularly limited, but since the mechanical force is not relatively applied to the base fabric sheet and the surface of the base fabric sheet is not damaged, it is immersed. It is preferable that the impregnation treatment is performed by a size press or a tab size breath by a method. The nonwoven fabric produced by the impregnation treatment will sufficiently shield the transmitted light even when the pattern is printed on either the front or back side because the water-dispersed organic polymer and the pigment penetrate into the raw fabric sheet. Can do. The pigment and the water-dispersed organic polymer are not uniformly present in the thickness direction of the nonwoven fabric, but the pigment content increases on the nonwoven fabric surface. The reason is not clear, but it is thought that the mobility of the pigment is lower than that of the water-dispersed organic polymer. Although the pigment inhibits the texture of the cloth-like texture, the ratio of the pigment is different between the inside and the surface of the nonwoven fabric. Is possible. Moreover, the effect that the pigment on the surface works effectively for shielding transmitted light is also produced.

  A drying system will not be specifically limited if it is a range which does not inhibit the effect of this invention. However, when dried with a cylinder dryer immediately after the impregnation treatment, the stain of the dryer is generated due to the stickiness of the water-dispersed organic polymer, and the wrinkle of the water-dispersed organic polymer may adhere to the nonwoven fabric when operated for a long time. Therefore, after drying the mixture of the water-dispersed organic polymer and the pigment with a specific contact method such as infrared drying or air dryer to reduce the stickiness of the sheet, smoothness is achieved by contact-type drying with a cylinder dryer. It is more preferable to take out.

The nonwoven fabric used for the head shielding cover of the present invention preferably has a density in the range of 0.2 to 0.55 g / cm ³ . The density can be appropriately adjusted by adjusting the fiber type, blending ratio, basis weight and thickness of the raw fabric sheet, the amount of water-dispersed organic polymer and pigment attached, the water-dispersed organic polymer compound / pigment mass ratio, and the like. . If the density is less than 0.2 g / cm ³ , the transmitted light may not be sufficiently blocked. When the density exceeds 0.55 g / cm ³ , it becomes a paper-like texture, and the fabric-like texture is lost and the air permeability tends to be lowered.

In the head shielding cover of the present invention, the fragile air permeability of the nonwoven fabric used is preferably 60 ml / cm ² / sec or less, more preferably 50 ml / cm ² / sec or less. Here, the fragile air permeability refers to the air permeability defined by the A-method fragile meter tester described in JIS-L1096. Arbitrary symbols are printed on the nonwoven fabric to impart light-shielding properties. However, if the Frazier air permeability is higher than 60 ml / cm ² / sec, the nonwoven fabric is difficult to be sucked and transportability may deteriorate. The fragile air permeability can be appropriately adjusted by adjusting the fiber type, blending ratio, basis weight and thickness of the base fabric sheet, the amount of water-dispersed organic polymer and pigment attached, the water-dispersed organic polymer / pigment mass ratio, etc. .

  The head shielding cover of the present invention is made using the above nonwoven fabric. The shape of the head shielding cover of the present invention is not particularly limited as long as it is a size and shape that can shield the entire head.

  When producing the head shielding cover of the present invention, first, an arbitrary pattern is printed on the nonwoven fabric. As a printing method, offset printing is preferable for the head shielding cover of the present invention from the viewpoint of cost and quality, but printing by other methods, for example, flexographic printing, screen printing, inkjet printing, sublimation heat transfer, and the like. The printing method may be used.

  Then, the head shielding cover is obtained by cutting the nonwoven fabric into an arbitrary shape and pasting the nonwoven fabric together. In order to bond the nonwoven fabric, glue or an adhesive may be used, or sewing may be performed using a thread. Further, the organic fiber can be fused by heating the bonded portion.

  The present invention will be described in more detail with reference to examples. Hereinafter, the parts and ratios described in the examples are based on mass.

[Making of raw fabric sheet] NBKP Kamloops (freeness 600 ml), polypropylene fiber (fiber diameter 2.2 decitex, fiber length 5 mm) and rayon fiber (fiber diameter 2.2 decitex, fiber length 5 mm) after beating the pulper Was mixed and dispersed in water at a blending ratio of 45:35:20, paper was made with a circular paper machine, dried with a Yankee dryer, and heat treated at 200 ° C. to obtain a base fabric sheet having a basis weight of 63 g / m ² . .
[Processing] A solid mixture containing 60% water-dispersed organic polymer (acrylic ester copolymer, etc.) and 40% calcium carbonate (Escalon 1500 (manufactured by Sankyo Flour Milling Co., Ltd.)) as a pigment in the raw cloth sheet And impregnating with a size press so as to be 32 g / m ² , followed by preliminary drying with an infrared dryer, followed by drying with a cylinder dryer, basis weight 95 g / m ² , density 0.342 g / cm ³ , A nonwoven fabric having a fragile air permeability of 27.8 ml / cm ² / sec was obtained (nonwoven fabric of Example 1).

As in Example 1, except that silica (Mizusawa Chemical Co., Ltd., trade name: Mizukasil P-510, average particle size 10 μm) was used instead of calcium carbonate (Escalon 1500) as a pigment during processing. A nonwoven fabric having a density of 0.320 g / cm ³ and a fragile air permeability of 31.66 ml / cm ² / sec was obtained (nonwoven fabric of Example 2).

A non-woven fabric having a density of 0.351 g / cm ³ and a fragile air permeability of 19.4 ml / cm ² / sec in the same manner as in Example 1 except that HS clay was used instead of calcium carbonate (Escalon 1500) as a pigment during processing. (Nonwoven fabric of Example 3) was obtained.

A density of 0.312 g / cm ³ and a fragile air permeability of 30.4 ml / cm ² / sec were the same as in Example 1 except that the ratio of the water-dispersed organic polymer / pigment mixture at the time of processing was changed to 20/80. Was obtained (nonwoven fabric of Example 4).

The density was 0.360 g / cm ³ and the fragile air permeability was 33.2 ml / cm ² / sec in the same manner as in Example 1 except that the ratio of the water-dispersed organic polymer / pigment mixture at the time of processing was changed to 95/5. Was obtained (nonwoven fabric of Example 5).

NBKP Kamloops (freeness 600 ml), polypropylene fiber (fiber diameter 2.2 decitex, fiber length 5 mm) and rayon fiber (fiber diameter 2.2 decitex, fiber length 5 mm) after beating the pulper when making the raw fabric sheet Was mixed and dispersed in water at a blending ratio of 80: 15: 5, and papermaking was carried out with a circular paper machine. The ratio of the water-dispersed organic polymer / pigment mixture during processing was the same as in Example 1 except that the density was 0. A nonwoven fabric having a 540 g / cm ³ fragile permeability of 17.8 ml / cm ² / sec was obtained (nonwoven fabric of Example 6).

The raw sheet was made in the same manner as in Example 1, and was impregnated with a size press using an impregnating solution containing 100% water-dispersed organic polymer and 0% calcium carbonate (Escalon 1500) as a pigment during processing. A nonwoven fabric having a basis weight of 95 g / m ² , a density of 0.353 g / cm ³ , and a fragile air permeability of 30.1 ml / cm ² / sec was obtained (nonwoven fabric of Comparative Example 1).

The raw sheet was made in the same manner as in Example 1, and the processing step was omitted to obtain a nonwoven fabric having a density of 0.218 g / cm ³ and a Frazier permeability of 39.2 ml / cm ² / sec (nonwoven fabric of Comparative Example 2). ).

  A 40% flat mesh pattern was printed on each of the above-described nonwoven fabrics. For printing, Ryobi Co., Ltd., RYOBI660, equipped with PS plate (VS made by Fujifilm Co., Ltd.), dampening solution (Nitro Chemical Co., Ltd. Astro Mark 3, 2% diluted solution), ink Printing was performed using (Naturalis (black) manufactured by DIC Corporation). Then, it assembled in the shape described in above-mentioned patent document 1, and obtained the head shielding cover of Examples 1-6 and Comparative Examples 1 and 2. FIG.

<Heat and moisturizing evaluation>
Ten monitors sat on the chairs and covered the head shielding covers of Examples 1 to 6 and Comparative Examples 1 and 2, respectively, and stayed there for 1 hour. The breathability at that time and the heat retention / humidity feeling of the head were evaluated by the following five-step evaluation, and the heat retention / moisture retention feeling was evaluated based on the evaluation result most frequently answered at this time. The results are shown in Table 1.

5 There is no breathlessness and it has moderate heat and moisture retention.
4 Although there is no shortness of breath, it is slightly lacking in heat and moisture retention.
3 Although there is no shortness of breath, I do not feel warmth and moisture retention.
2 Slightly stuffy, the inside of the head cover is somewhat hot.
1 The inside of the head shielding cover is stuffy.

<Light shielding evaluation>
In a room with an illuminance of 1000 lux, 10 monitors sit on a chair and wear the head shielding covers of Examples 1 to 6 and Comparative Examples 1 and 2, respectively. Evaluation was made using a five-step evaluation, and the light shielding property was evaluated based on the evaluation result that received the most responses. The results are shown in Table 1.

5 There is moderate darkness and is suitable for sleeping.
4 The darkness is moderate, but a slightly bright place is felt in part.
3 Light shielding is uneven and slightly bright.
2 Almost the whole is slightly bright and not suitable for sleep.
1 The brightness feels uncomfortable.

  As is apparent from the above results, the head can be appropriately kept warm and moisturized by using the head shielding cover of the present invention. Moreover, the head shielding cover of the present invention can easily be provided with a light shielding property suitable for sleep.

Claims (1)

  A head shielding cover comprising a nonwoven fabric sheet comprising at least a wood pulp and organic fibers, and a water-dispersed organic polymer and a pigment added to a base fabric sheet made by wet papermaking.