JP5953661B2 - Moisture permeable film and method for producing the same - Google Patents

Description

  The present invention relates to a moisture permeable film, and particularly has a good touch and is excellent in moisture absorption / release properties and moisture permeability, has water impermeability and has excellent physical strength.

  Conventionally, various laminated films having a structure in which a moisture-permeable base film and a nonwoven fabric are bonded together have been devised as a packaging material that requires moisture permeability but does not allow contents such as fine particles and liquid to leak outside the package. .

A typical example is a film for desiccant packaging, and main performances required for the film for desiccant packaging include high moisture permeability, hermeticity that the desiccant powder does not leak, and poor tearability. As a laminated film satisfying these performances, a biaxially stretched nylon film layer, a network-structured reinforcing material layer laminated on one side of the biaxially oriented nylon film layer, and a laminated material on the reinforcing material layer A breathable packaging material having a non-woven fabric layer having heat-sealability (in the application, it is a breathable packaging material, but actually there is no breathability in the invention of the present application, and correctly a moisture-permeable packaging And the like have been made. (See Patent Document 1)
Moreover, the device which maintains the air permeability which a base material has is also made | formed by bonding together a heat-resistant air-permeable base material and a linear low density polyethylene sheet with the adhesive agent which apply | coated the pattern. (See Patent Document 2)

JP 2004-25662 A Shokai 63-51721

Conventionally, as a measure for judging the moisture permeability of a film, literally, the moisture permeability of the film, that is, the numerical value of water vapor permeability is used. The basic method for measuring the water vapor transmission rate is to measure how much water vapor permeates to the dry side while keeping one side of the film to be in a constant high humidity state and the other side to be almost completely dry. The water vapor transmission weight per fixed area when the water vapor transmission amount is in an equilibrium state is divided by the time.
This representation method measures the amount of water vapor transferred after the concentration gradient in the thickness direction of water vapor absorbed by the test film reaches equilibrium, and is suitable for judging moisture permeability for a relatively long period of time. For example, when designing specifications for packaging materials for dry foods and liquid pharmaceuticals, for example, if a person who sweats sits on a film, the film is placed on hands wet with water. It is not suitable for judging a large amount of water vapor permeation or moisture absorption in a short time, such as when baked bread is wrapped with a film. Moisture absorption and desorption of water in contact is not expressed.

Thus, the water absorption of the film is an important measure for expressing a large amount of water vapor permeation and moisture absorption in a short time, and the water absorption can be expressed by replacing it with a high water absorption rate. However, the nylon film on which the metal oxide is deposited has a high water absorption rate for the nylon film that is the base material, so even if the water absorption rate in the data is high, the water vapor permeability of the metal oxide vapor deposition film is very low. It cannot be said that a large amount of water vapor permeated or absorbed in time is good. Such a phenomenon also applies to a film having a hydrophobic coating film, such as a polyvinylidene chloride coated film. For example, the water vapor permeability of a 25 μm thick biaxially stretched polyethylene terephthalate film is about 20 g / m ² · day, and the water vapor permeability of a 2.5 μm thick biaxially stretched polyethylene terephthalate film is approximately 200 g. / M ² · day, which shows a good value as a moisture permeable film, but when a biaxially stretched polyethylene terephthalate film having a thickness of 2.5 μm is wound around the body, it becomes steamed.

  A further material to note is an adhesive. In general, the two-component curable urethane resin adhesive used for bonding packaging films shows good moisture permeability because the thickness of the coating film is several μm when discussing moisture permeability. When discussing a large amount of water vapor permeation or water absorption in a short time, the water absorption rate is not so high, so it is difficult to say that it is a preferred material. When used for a moisture permeable film, the application amount is reduced. It is necessary to devise measures such as reducing the area.

  In the case of Patent Document 1, a method in which an adhesive is applied to the entire surface of a base film and a nonwoven fabric is bonded is used. However, the surface of the nonwoven fabric is not a flat surface. The adhesive surface of the adhesive is only bonded to a few fibers on the surface of the nonwoven fabric, so most of the adhesive-coated surface is not bonded to anything, and the adhesive covers the base film surface wastefully. Therefore, there is a problem that a large amount of water vapor permeation or moisture absorption is not high in a short time.

  In addition, as in Patent Document 2, the method of partially exposing the surface of the base film by pattern coating with an adhesive utilizes the moisture permeability of the base film compared to the case where the adhesive is applied to the entire surface. However, the ratio of covering the surface of the base film unnecessarily in the adhesive application portion is the same as the entire surface of the adhesive application, and further, since the non-woven fabric is not bonded in the adhesive non-application portion, In the laminated film with the nonwoven fabric having a small contact area, there is a problem that the bonding strength is insufficient.

In addition, in the case of dry lamination, in which a commonly used two-component curable urethane resin solvent solution is applied to a substrate film, the solvent is dried with hot air, and then the nonwoven fabric is bonded, the solvent adsorbed by the resin is completely removed. Residual solvent is generated, especially in applications that directly touch the skin, there are problems with hygiene, and in addition, if the film is not breathable, such as a normal, biaxially stretched film, the residual solvent The amount of leaching on the surface is negligible, but in the case of non-woven fabric, residual solvent comes out directly from the adhesive application surface, so in addition to hygiene problems, the solvent odor is strong, and it is worn on the body, bedding and furniture. When used as a cover, some people complain of sick house syndrome or complain of headache or poor physical condition.
Also, when a laminated film of a base film and a nonwoven fabric is used as a protective film for protecting the painted surface of an automobile, the residual solvent causes problems such as erosion of the painted surface and loss of gloss.

  Furthermore, when a dry lamination adhesive is applied to the nonwoven fabric, the adhesive soaks between the fibers of the nonwoven fabric, making it difficult to dry and the amount of residual solvent rises abnormally. And sticks to the impression cylinder of the adhesive application part, and the nonwoven fabric wraps around the impression cylinder.

  In view of the above-mentioned present situation, the present invention is excellent in a large amount of water vapor permeation and moisture absorption in a short time, excellent in bonding strength with a nonwoven fabric, very excellent in hygiene, and excellent in touch. An object is to provide a moisture-permeable film.

As a result of various studies to solve the above problems, the present invention applies a two-component curable urethane resin-based solventless adhesive to one surface of the nonwoven fabric and absorbs water on the adhesive-coated surface. By using a moisture-permeable film characterized in that the adhesive portion is not attached to the water-absorbing substrate film and is exposed on the bonding surface by bonding the adhesive substrate film Provide a moisture-permeable film that is excellent in a large amount of water vapor permeation and moisture absorption in a short period of time, excellent in bonding strength with a nonwoven fabric, very hygienic, and in touch. It is. In addition, by using a two-component curable urethane resin-based solventless adhesive, there is no solvent odor and a hygroscopic film with excellent hygiene can be obtained. A suitable moisture-permeable film can be provided.

  According to a second aspect of the present invention, the water-absorbing substrate film is a plain cellophane film, nylon film, polyvinyl alcohol film, MXD nylon coextruded nylon film, MXD nylon blend nylon film, ethylene / vinyl alcohol copolymer coextruded nylon film, hydrophilic It is a moisture-permeable film characterized by comprising either a reactive oxygen barrier layer-coated nylon film or an ethylene / vinyl alcohol copolymer film. Plain cellophane film, nylon film, polyvinyl alcohol film, MXD nylon coextruded nylon film, MXD nylon blend nylon film, ethylene / vinyl alcohol copolymer coextruded nylon film, hydrophilic oxygen barrier layer coated nylon By using either a film or an ethylene / vinyl alcohol copolymer film, it is possible to obtain a moisture-permeable film that does not allow water to permeate while being able to absorb a large amount of water vapor and absorb water in a short time. .

  A third aspect of the present invention is the moisture permeable film, wherein the nonwoven fabric is made of nylon or cotton, or water-absorbing fibers of a mixed fiber of rayon and pulp. By using either nylon or cotton, which is a water-absorbing fiber, or a mixed fiber of rayon and pulp, a moisture-permeable film having a more comfortable touch can be obtained in applications such as wearing on the body.

  According to a fourth aspect of the present invention, on the remaining surface of the moisture-permeable film obtained by bonding the nonwoven fabric to one surface of the water-absorbent base film using the film described above, and on the other surface, the two-component curable urethane resin system is not used. A moisture permeable film characterized in that a nonwoven fabric coated with a solvent-type adhesive is bonded. By bonding the nonwoven fabric to both sides of the water-absorbent substrate film, the dry film sound that is emitted when the water-absorbent film is bent can not be emitted, and can be used comfortably for purposes such as wearing on the body, and transparent. The wet film can be reinforced and the sewing can be easily performed.

  Claim 5 adheres to the water-absorbent substrate film on the remaining surface of the water-absorbent substrate film of the moisture-permeable film in which the nonwoven fabric is bonded to one surface of the water-absorbent substrate film using the above described film. Dry lamination to apply adhesive, non-solvent lamination to apply adhesive to water-absorbing substrate film, hot-melt lamination by partial application to water-absorbing substrate film, or molten thermoplastic resin extruded in a large number of lines in parallel Is a moisture-permeable film characterized in that a nonwoven fabric is bonded together by any means of extrusion lamination. By bonding the nonwoven fabric to both sides of the water-absorbent substrate film, the dry film sound that is emitted when the water-absorbent film is bent can not be emitted, and can be used comfortably for purposes such as wearing on the body, and transparent. The wet film can be reinforced and the sewing can be easily performed.

  A sixth aspect of the present invention is a furniture cover such as a seat cover, a chair cover, and a table cover, and a bedding cover such as a futon cover, a sheet, and a pillow cover made of the moisture permeable film. By using the above-mentioned moisture-permeable film, it is an excellent product that has never been seen before, especially in furniture covers such as seat covers, chair covers, and table covers, and bedding covers such as futon covers, sheets, and pillow covers. it can.

  7. The moisture permeable film according to claim 1, wherein the nonwoven fabric is made of a non-water-absorbing fiber of a polyethylene terephthalate long fiber nonwoven fabric or a polyethylene nonwoven fabric of a flash spinning / thermal bond method. is there. By selecting polyethylene terephthalate long fiber nonwoven fabric or flash spinning / thermal bond type polyethylene as the nonwoven fabric made of non-water-absorbing fibers, water does not pass but water vapor passes, and the surface of the nonwoven fabric is hard to contain moisture. A surface protective film suitable for protecting a dried object can be obtained, and an effect that contact marks of the protective film hardly remain on the surface of the object to be protected can be obtained.

  An eighth aspect of the present invention is a surface protective film made of the moisture permeable film.

The moisture-permeable film of the present invention can be applied to a nonwoven fabric by selecting a laminating method using a solventless adhesive, and the solvent-free adhesive can be applied to the nonwoven fabric to absorb water. By laminating the base film, the adhesive is applied only to the contact surface with the water-absorbing base film on the nonwoven fabric surface and to the entire contact surface, thereby applying the adhesive to the entire surface of the conventional film. Compared to the bonding method, the moisture absorption or water absorption inhibition of the water absorbent substrate film is remarkably reduced by exposing the water absorbent substrate film surface to the bonding surface, and it adheres to the entire surface of the substrate film. The adhesive strength equivalent to the case where the agent is applied can be obtained.

The moisture-permeable film of the present invention can be applied to a nonwoven fabric by using a two-component curable urethane resin-based solventless adhesive, and a two-component curable urethane resin-based solventless adhesive. Is applied to the non-woven fabric and the water-absorbing base film is laminated, so that the adhesive is applied only to the contact surface of the non-woven fabric surface with the water-absorbing base film, and to the entire contact surface. Compared with moisture-permeable films using a bonding method in which an adhesive is applied to the entire surface of the film, moisture absorption of the water-absorbing substrate film or inhibition of water absorption by exposing the water-absorbing substrate film surface to the bonding surface Is significantly reduced, and a large amount of water vapor permeation and moisture absorption in a short time are excellent, and an adhesive strength equivalent to that obtained when an adhesive is applied to the entire surface of the base film can be obtained.

  In addition, by using a two-component curable urethane resin-based solventless adhesive, there is no solvent odor and a hygroscopic film with excellent hygiene can be obtained. A suitable moisture-permeable film can be provided.

  The moisture-permeable film of the present invention can be applied to a nonwoven fabric by selecting a bonding method using a two-component curable urethane resin-based solventless adhesive, and the two-component curable urethane resin The non-solvent adhesive is applied to the nonwoven fabric, and then the water-absorbing substrate film is bonded, so that the adhesive is applied only to the contact surface with the water-absorbing substrate film on the nonwoven fabric surface and the contact surface. Compared with the pasting method of applying an adhesive to the entire surface of a conventional film by being performed on the entire surface, moisture absorption of the water-absorbing substrate film by exposing the water-absorbing substrate film surface to the bonding surface, or Inhibition of water absorption is remarkably reduced, and a large amount of water vapor permeation and moisture absorption in a short period of time are obtained, and an adhesive strength equivalent to that obtained when an adhesive is applied to the entire surface of the base film is obtained. It is intended to provide a method for producing a moisture-permeable film.

It is a schematic sectional drawing of the moisture-permeable film which bonded the nonwoven fabric on the single side | surface of the water absorbing base film which concerns on this invention. It is a schematic sectional drawing of the moisture-permeable film which bonded the nonwoven fabric on both surfaces of the water absorptive base film which concerns on this invention. It is a schematic diagram which shows the adhesion state of the fiber which comprises the water absorptive base film of the moisture-permeable film which concerns on this invention, and a nonwoven fabric. It is a schematic diagram which shows the adhesion state of the water | moisture-content base film of the moisture-permeable film bonded together by the conventional method, and the fiber which comprises a nonwoven fabric. It is the schematic of a common non-solvent laminator.

  The present invention will be described in detail below with reference to the drawings.

(Bonding method) The moisture-permeable film according to the present invention has a structure in which a water-absorbing substrate film and a nonwoven fabric are bonded via an adhesive layer, as schematically shown in FIG. The outline at the time of bonding a nonwoven fabric on both surfaces of a base film is shown.
In the schematic diagram, there is no difference from the conventional product, but there is a clear difference in the actual film. That is, the moisture-permeable film according to the present invention is obtained by applying a two-component curable urethane resin-based solventless adhesive to a nonwoven fabric and applying a water-absorbent substrate film to the two-component curable urethane resin-based solventless adhesive coating surface. Therefore, the adhesive is applied only to the surface of the fiber exposed on the surface of the nonwoven fabric, and therefore, the adhesive is applied only to the portion where the nonwoven fabric and the water-absorbent substrate film are in contact with each other. A portion where the adhesive is not exposed to the water-absorbing substrate film is formed, and the moisture-absorbing property, water-absorbing property, or moisture-releasing property of the water-absorbing substrate film can be utilized. FIG. 3 is a schematic view showing a bonded state of the water-absorbing base film of the moisture-permeable film according to the present invention and the fibers constituting the nonwoven fabric, and FIG. 4 is a water-absorbing base film of the moisture-permeable film bonded by a conventional method. It is a schematic diagram which shows the adhesion state of the fiber which comprises a nonwoven fabric. In the method for producing a moisture-permeable film according to the present invention, since the nonwoven fabric and the water-absorbing substrate film are bonded only at the contacting portions, the nonwoven fabric and the water-absorbing substrate film are substantially line bonded. Although it seems that the bonding strength is insufficient because it is bonded only by the wire, it is actually the same bonding state as the conventional manufacturing method, and the laminate strength of the moisture permeable film according to the present invention is inferior. Not.

If the amount of adhesive applied to the nonwoven fabric is too large, the bonded film will become hard, and the soft texture of the nonwoven fabric will be impaired, and the exposed area of the water-absorbent substrate film will be reduced. When the non-woven fabric is thin, the adhesive slips through, and winding after bonding causes blocking. Such a phenomenon does not occur if the basis weight of the non-woven fabric is large, and tends to occur if the basis weight is small, even at the same coating amount. Moreover, when too little, naturally adhesive strength falls. However, the surface state of the non-woven fabric varies widely depending on the type of non-woven fabric. For example, the surface of a nylon long-fiber non-woven fabric is a non-woven fabric with bare fibers and an adhesive is applied. The ratio of the area of the part in contact with the roll is very small. In such a case, even if the coating amount per area is half that when applying the adhesive to the entire surface of the normal film, it adheres to the fibers on the nonwoven fabric surface. The amount of adhesive that has been increased. In addition, non-woven fabrics that use flash spinning and thermal bonding, and those that contain a large amount of pulp are so smooth that gravure printing can be applied, and it is possible to apply adhesive to non-woven fabrics that have such high smoothness. As much as possible, the application amount should be reduced. However, the two-component curable urethane resin solventless adhesive has a very weak initial tack force immediately after bonding, and the bonding surface partially peels into a pipe shape with a width of several millimeters. Caution must be taken. Thus, although the application amount of the two-component curable urethane resin-based solventless adhesive on the nonwoven fabric surface according to the present invention cannot be determined unconditionally, it is empirically widely 0.2 g / m ² to in the range of 5.0 g / m ^2, preferably carried out bonding in the range of ^{0.5g / m 2 ~3.0g / m 2} , and the presence or absence of blocking, while viewing the texture of the laminated film, as appropriate It is necessary to change the application amount and cope with it.

  Moreover, the general non-solvent laminator shown in FIG. 5 can be used for the apparatus used for bonding by the two-component curable urethane resin solventless adhesive according to the present invention.

  Moreover, as an adhesive agent, a normal two-component curable urethane resin solventless adhesive can be used, and a one component urethane resin solventless adhesive may be used.

(Water-absorbing base film) The performance required for the water-absorbing base film is water absorption and moisture permeability.
As an index of water absorption, the film has a water absorption of 5% or more, preferably 8% or more.
For moisture permeability, the water vapor permeability of the film is a reference, but the water vapor permeability changes as the thickness changes. For example, the water vapor permeability of a polyethylene terephthalate film having a thickness of 2.5 μm is 200 g / m ² · day. A nylon film with a thickness of 100 μm has a water vapor transmission rate of 100 g / m ² · day, and a nylon film with a thickness of 100 μm has a lower water vapor transmission rate. Therefore, when the water vapor transmission rate is referred to, if it is not a coating film, it is preferable to provide a standard thickness and calculate and judge the water vapor transmission rate at the standard thickness. For example, the water vapor permeability of the film used as the water-absorbing substrate film according to the present invention is preferably 100 g / m ² · day or more in terms of 25 μm, and more preferably 200 g / m ² · day or more. .
For example, when the notation method is not weight but basis weight such as cellophane film, the actual film thickness and water vapor permeability may be measured.

  Films with excellent water absorption and moisture permeability include plain cellophane film, nylon film, polyvinyl alcohol film, MXD nylon co-extruded nylon film, MXD nylon blend nylon film, ethylene-vinyl alcohol copolymer co-extruded nylon film, or ethylene Examples include films such as vinyl alcohol copolymer films, and films coated with these films within a range that does not impair moisture permeability and hygroscopicity. In addition, nylon films coated with a hydrophilic oxygen barrier layer, for example, , Product name “Co-Barrier” (manufactured by Kojin Co., Ltd.), product name “Clarista N” (manufactured by Kuraray Co., Ltd.), product name “Besera EA” (manufactured by Kureha Co., Ltd.), product name “HON” (Daicel Value Coating Co., Ltd.) Made) Oxygen barrier layer-coated nylon film such as, etc. can be suitably used, and by using any of these films, the moisture permeability is good, especially while being excellent in a large amount of water vapor transmission and moisture absorption in a short time, A moisture-permeable film that does not allow water to pass through can be obtained, except that a film provided with a film that inhibits the permeation of water vapor, such as a polyvinylidene chloride coated film, a metal oxide vapor-deposited film, or a metal vapor-deposited film. Is low and not used.

  Even if the coating film is made of a material having a low hydrophobicity or low water absorption, it may be used if it is very thin and has little influence on the water vapor permeability and water absorption of the water-absorbing substrate film. However, since the allowable value of the coating thickness varies depending on the properties of the coating film, it is necessary to actually manufacture and check the moisture-permeable film. In use, the surface of the water-absorbing substrate film having better water absorption may be disposed on the surface side where moisture and moisture increase.

  In addition, the water-absorbing substrate film can be printed with characters and patterns by a known method, and can be coated with a surface modifier such as an antistatic agent or a water repellent. For this reason, if the substance is not a substance that reverses when wound up and inhibits adhesion, it is preferable to perform printing or coating with the water-absorbing substrate film alone before bonding to the nonwoven fabric. In printing and coating, in consideration of the influence on moisture permeability and hygroscopicity, it is necessary to devise such as applying a pattern coat or making the coating film as thin as possible.

Moreover, the film which laminated | stacked water-absorbing base film can also be used for a water-absorbing base film.
When laminating a water-absorbing substrate film to obtain a laminated water-absorbing substrate film, it is necessary to devise and bond the moisture-absorbing substrate film so that the moisture permeability does not decrease as much as possible.
Specifically, it is preferable to use a laminating method in which the moisture permeability of the water-absorbent film can be utilized as much as possible by reducing the amount of adhesive applied as much as possible or by partially applying the adhesive. Preferable methods include lamination, pattern coating dry lamination, non-solvent lamination, hot melt lamination by partial coating such as spray coating and linear coating, or extrusion lamination with a molten thermoplastic resin extruded in a number of lines in parallel. Can be used.

(Nonwoven fabric) The nonwoven fabric used for the moisture permeable film according to the present invention may be any of wet and dry manufacturing methods, long fibers, short fibers, etc., but the user's convenience such as hardness and softness depends on the use. Select according to your needs.
In particular, non-woven fabrics made of water-absorbing fibers are soft to the touch, and non-woven fabrics made of either nylon, cotton, or mixed fibers of rayon and pulp are suitable for use on the body, as long as they do not impair the touch. For example, functional fibers for reinforcement, heat sealing, etc. may be mixed. In particular, a non-woven fabric produced from the above fibers by a thermal bond method, a needle punch method, a water punch method or the like without using an adhesive.

In addition, the moisture-permeable film according to the present invention can be made of non-water-absorbing or non-water-absorbing non-woven fabric such as polyethylene, polypropylene, polyethylene terephthalate, etc. Fiber nonwoven fabrics can also be used. As a heat-sealable non-woven fabric having a core-sheath structure and a surface made of polyethylene, a product name “Elves” (manufactured by Unitika Co., Ltd.) whose sheath is made of polyethylene terephthalate is marketed.
If the fiber surface is made of a material with poor adhesion, such as polyethylene or polypropylene, the adhesion can be improved by lowering the surface tension by corona discharge treatment, plasma treatment, ozone treatment, etc. It is preferable to apply a resin that indirectly improves adhesion, such as a primer or an anchor coating agent, or to increase the amount of adhesive applied so that the adhesive is entangled with the fibers.
Among non-woven fabrics made of non-water-absorbing fibers, polyethylene terephthalate long-fiber nonwoven fabrics, flash-spun / thermal-bonded polyethylenes, or polypropylene nonwoven fabrics contain almost no additives, and are produced using these. The moisture-permeable film according to the present invention can be suitably used as a surface protective film. The moisture-permeable film according to the present invention in which a water-absorbent base film and a non-woven fabric made of non-water-absorbing fibers are bonded together protects dried objects because water does not pass through but water vapor passes through and the surface of the nonwoven fabric hardly contains water. By selecting a polyethylene terephthalate long fiber nonwoven fabric or a flash spinning / thermal bond type polyethylene nonwoven fabric as the nonwoven fabric composed of non-water-absorbing fibers, the surface of the object to be protected can be obtained. In addition, there is an effect that the contact mark of the protective film hardly remains.

  In addition, orthogonal nonwoven fabric (for example, product name “Milife”, manufactured by JX Nippon Mining & Metals Corporation), split fiber nonwoven fabric (for example, product name “Warif”, JX Nippon Mining & Materials Corporation, ANCI Co., Ltd.) and non-woven fabrics having many voids, such as non-woven fabrics in which fibers are crossed in a net shape (for example, product name “Conwed Net”, manufactured by JX Nippon Mining & Metals Corporation). The moisture-permeable film which concerns on this invention can be manufactured using the bonding method which concerns on this.

(Non-woven fabric double-sided bonding) A moisture-permeable film in which a non-woven fabric is bonded to both sides as well as one side of a water-absorbing substrate film can be produced.

By bonding non-woven fabrics to both sides of the water-absorbent base film, the irritating dry film sound that is generated when the water-absorbent film is bent can no longer be emitted, and it can be worn on the body, bedding covers, furniture covers, etc. It can be used more comfortably, and both sides of the moisture permeable film can be reinforced, and the reinforcement can be performed, so that the sewing can be easily performed and the spread of the needle hole due to the sewing can be prevented. Furthermore, if a heat-sealable non-woven fabric is bonded to the opposite side of the non-woven fabric made of water-absorbing fibers, heat sealing can be applied to form a bag, and flash spinning / If a protective garment is manufactured using a moisture-permeable film bonded with a thermal bond non-woven fabric with the non-woven fabric surface made of water-absorbing fibers inside, a protective garment that is not easily stuffy and has excellent heat retention can be obtained.

When laminating the nonwoven fabric on both sides of the water-absorbent base film, if both sides are coated with a non-solvent adhesive on the nonwoven fabric and pasted with the water-absorbent base film surface, it has excellent moisture permeability and high laminating strength, A moisture-permeable film having an excellent texture can be obtained.
Further, only one side may be bonded using the bonding method according to the present invention, and the remaining surface may be bonded using a known bonding method.
When using a known laminating method only on one side, a laminating method that can utilize the moisture permeability of the water-absorbing film as much as possible by reducing the amount of adhesive applied as much as possible or by partially applying the adhesive, etc. In particular, dry lamination, pattern coating dry lamination, non-solvent lamination, hot melt lamination by partial coating such as spray coating or linear coating, or extrusion lamination by a molten thermoplastic resin extruded in many straight lines in parallel Such a method can be suitably used.

(Moisture permeable film) The moisture permeable film according to the present invention is used for the above-mentioned seat covers, chair covers, furniture covers such as table covers, bedding covers such as futon covers, sheets and pillow covers, and fabrics such as protective clothing. And, it is not limited to the surface protective film, and it can be used for various applications where a liquid does not pass but it is desired to transmit a large amount of water vapor.
Moreover, a hook-and-loop fastener, a button, etc. can be mounted | worn with an adhesive agent, an adhesive tape, sewing etc. as needed.

Example 1
Next, the present invention will be described more specifically with reference to examples.
(Manufacture of moisture-permeable film)
A polyvinyl alcohol film having a width of 1040 mm and a thickness of 40 μm (product name “SOLBRON NP”, manufactured by Aicero Chemical Co., Ltd.) is selected as the water-absorbing substrate film according to the present invention, and a non-solvent laminator is used to absorb water on one side. As a non-woven fabric made of fibers, a cotton fiber non-woven fabric having a width of 1040 mm and a basis weight of 30 g / m ² (product name “Cot Ace P030S / A01”, manufactured by Unitika Ltd.) 1.2 g of a two-component curable urethane resin solventless adhesive The moisture-permeable film according to the present invention is obtained by applying a solventless adhesive to a nonwoven fabric and pasting it together with a water-absorbing substrate film by applying / m ² and pasting and aging at 35 ° C. for 2 days. It was.
(Manufacture of disposable sheets)
Each 10 mm end of the moisture permeable film was cut off with a slitter to a width of 1020 mm, and then cut into a length of 2050 mm with a cutting machine to obtain disposable sheets and a futon cover.
As a result of laying on the mattress with the non-woven surface of the sheet or duvet cover up and sleeping, it is a sheet and duvet cover that absorbs sweat without odor, feels good, and does not stuffy, and the polyvinyl alcohol film is flexible He was well-natured and well-familiar with the body and was able to sleep comfortably.
Further, even if water was spilled on the sheets or the futon cover, no water leaked to the futon surface.
From these results, if the disposable sheet or futon cover is used in a hospital or the like, the labor of washing can be saved, and effects such as prevention of infection of workers and transfer of contaminants between the sheet and duvet cover can be obtained. Is suggested. In particular, if it is used for a couch or stretcher cover used in an ambulance, blood and body fluid do not soak into the cloth or cushion, which helps prevent inadvertent infection.

(Example 2-1)
(Manufacture of moisture-permeable film)
A biaxially stretched nylon film (product name “N1102”, manufactured by Toyobo Co., Ltd.) having a width of 1040 mm and a thickness of 15 μm is selected as the water-absorbing substrate film according to the present invention, and its corona-treated surface using a non-solvent laminator. Apply a two-component curable urethane resin solventless adhesive 1.0g / m ² to a nylon long-fiber nonwoven fabric (product name “Niace P0403WTO”, manufactured by Unitika Ltd.) having a width of 1040 mm and a basis weight of 40 g / m ^2. And aged at 35 ° C. for 2 days to obtain a moisture permeable film according to the present invention in which a non-solvent adhesive was applied to the nonwoven fabric and bonded to the nylon film.
(Manufacture of pillow covers)
The moisture permeable film was slit to a width of 340 mm and then cut to 750 mm with a cutting machine, and a surface fastener was attached to the short part in the longitudinal direction using a double-sided adhesive tape to obtain a pillow cover.
The pillow cover is wrapped around the pillow so that the nonwoven fabric surface is on the outside and fixed with a hook-and-loop fastener. As a result of using it at bedtime, it is odorless, feels good, absorbs sweat without stuffiness, and provides a comfortable sleep. It was.

(Example 2-2 to Example 2-7)
(Manufacture of moisture-permeable film)
As a water-absorbing substrate film according to the present invention,
Example 2-2: Plain cellophane film having a width of 1040 mm and a basis weight of 30 g / m ² (no corona treatment, product name “PL1”, manufactured by Phutamura Chemical Co., Ltd.)
Example 2-3: Unstretched nylon film having a width of 1040 mm and a thickness of 20 μm (single-sided corona treatment, product name “Rayfan NO1401”, manufactured by Toray Film Processing Co., Ltd.),
Example 2-4: MXD nylon co-extruded nylon film having a width of 1040 mm and a thickness of 15 μm (single-sided corona treatment, product name “Bonyl SPY”, manufactured by Kojin Co., Ltd.),
Example 2-5: MXD nylon blend nylon film having a width of 1040 mm and a thickness of 15 μm (single-sided corona treatment, product name “Uniathlon TB-1000”, manufactured by Idemitsu Unitech Co., Ltd.)
Example 2-6: Nylon film coextruded with ethylene / vinyl alcohol copolymer having a width of 1040 mm and a thickness of 15 μm (single-sided corona treatment, product name “Super Neal EP”, manufactured by Mitsubishi Plastics, Inc.)
Example 2-7: hydrophilic oxygen barrier layer-coated nylon film having a width of 1040 mm and a thickness of 15 μm (having adhesiveness on the coated surface, product name “Co-barrier”, manufactured by Kojin Co., Ltd.), and
Example 2-8: Ethylene / vinyl alcohol copolymer film having a width of 1040 mm and a thickness of 15 μm (no corona treatment, product name “EVAL EF-F”, manufactured by Kuraray Co., Ltd.)
Using a non-solvent laminator, a non-corona-treated surface, coated surface, or non-corona-treated film has a nylon long-fiber nonwoven fabric (product name “NIACE P0403WTO”) having a width of 1040 mm and a basis weight of 40 g / m ^{2 on} one side. By applying a two-component curable urethane resin solvent-free adhesive 1.0 g / m ² to Unitika Co., Ltd., and aging at 35 ° C. for 2 days to give a solvent-free adhesive to the nonwoven fabric. Plain cellophane film, unstretched nylon film, MXD nylon coextruded nylon film, MXD nylon blend nylon film, ethylene / vinyl alcohol copolymer coextruded nylon film, hydrophilic oxygen barrier layer coated nylon film, or ethylene vinyl With alcohol copolymer film Seven types of moisture-permeable films according to the present invention bonded together were obtained. (See Table 1)
(Manufacture of pillow covers)
After slitting the moisture-permeable film of Examples 2-2 to 2-7 to a width of 340 mm, it was cut into 750 mm with a cutting machine, and a hook-and-loop fastener was attached to the short part in the longitudinal direction using a double-sided adhesive tape to obtain a pillow cover. It was.
The pillow cover is wrapped around the pillow so that the nonwoven fabric surface is outside and fixed with a hook-and-loop fastener. As a result of using it at bedtime, as shown in Table 1, any moisture-permeable film absorbs sweat well without stuffiness. Comfortable sleep with good touch, no unpleasant odor.

(Comparative Example 1)
(Manufacture of comparative film)
A biaxially stretched nylon film (product name “N1102”, manufactured by Toyobo Co., Ltd.) having a width of 1040 mm and a thickness of 15 μm is selected as the water-absorbing substrate film, and a two-component curable urethane is used on its corona-treated surface using a dry laminator. A resin-based adhesive was applied at 2.0 g / m ^{2, and} a nylon long fiber nonwoven fabric (product name “NIACE P0403 WTO”, manufactured by Unitika Ltd.) having a width of 1040 mm and a basis weight of 40 g / m ² was bonded to the coated surface. The film of the comparative example which apply | coated the solvent type adhesive agent to the nonwoven fabric and bonded together with the nylon film by aging at 2 degreeC for 2 days was obtained.
(Manufacture of pillow covers)
The moisture permeable film was slit to a width of 340 mm and then cut to 750 mm with a cutting machine, and a surface fastener was attached to the short part in the longitudinal direction using a double-sided adhesive tape to obtain a pillow cover.
The pillow cover was wrapped around a pillow so that the nonwoven fabric surface was outside and fixed with a hook-and-loop fastener, and as a result of using it at bedtime, the touch was good, but since the adhesive was applied to the entire surface, the film was stiff In addition, the residual solvent had an odor of ethyl acetate and a comfortable feeling was not obtained.

Example 3
(Manufacture of moisture-permeable film)
A biaxially stretched nylon film (product name “N1102”, manufactured by Toyobo Co., Ltd.) having a width of 1020 mm and a thickness of 25 μm is selected as the water-absorbing substrate film according to the present invention, and a non-solvent laminator is used on its corona-treated surface. Te, width 1020 mm, polyethylene terephthalate filament nonwoven fabric having a basis weight of 30 g / m ² (product name "Marix 70300WSO", manufactured by Unitika Ltd.) in a two-component curing type urethane resin solventless adhesive 1.0 g / m ² By applying and bonding, and aging at 35 ° C. for 2 days, a solventless adhesive was applied to the nonwoven fabric and bonded to the nylon film to obtain a moisture-permeable film according to the present invention.
(Manufacture of surface protection film)
The both sides of the moisture permeable film were cut off with a slitter to a width of 1000 mm, and then cut into a length of 1800 mm with a cutting machine to obtain a surface protective film.
Put the surface protection film on the trunk lid of the car so that the nylon film surface is on the outside. Fix the remaining part on the back of the trunk lid with adhesive tape, close the trunk lid and leave the car for one week. Left in a parking lot without a roof.
As a result, in spite of rain during the test period, no water droplets or dew condensation was observed in the area sandwiched between the trunk lid surface and the surface protective film. The portion covered with the protective film was not soiled, and the trace of the nonwoven fabric did not remain on the painted surface of the automobile.

(Comparative Example 2)
(Manufacture of comparative film)
A biaxially stretched nylon film (product name “N1102”, manufactured by Toyobo Co., Ltd.) having a width of 1020 mm and a thickness of 25 μm is selected as the water-absorbing substrate film according to the present invention, and a dry laminator is used on its corona-treated surface. the liquid curable urethane resin adhesive 2.0 g / m ² was coated, the coated surface width 1020 mm, basis weight 30 g / m ² of polyethylene terephthalate filament nonwoven fabric (product name "Marix 70300WSO", manufactured by Unitika Ltd.) And a film according to a comparative example was obtained.
(Manufacture of surface protection film)
The both sides of the moisture permeable film were cut off with a slitter to a width of 1000 mm, and then cut into a length of 1800 mm with a cutting machine to obtain a surface protective film.
Put the surface protection film on the trunk lid of the car so that the nylon film surface is on the outside. Fix the remaining part on the back of the trunk lid with adhesive tape, close the trunk lid and leave the car for one week. Left in a parking lot without a roof.
As a result, due to rain during the test period, water droplets were slightly attached to the surface of the trunk lid covered with the surface protective film, and when the surface protective film was removed, it was covered with the surface protective film. The coating was slightly cloudy due to the residual solvent of the protective film.

Example 4
(Manufacture of moisture-permeable film)
A double-sided corona-treated biaxially stretched nylon film (product name “N1202”, manufactured by Toyobo Co., Ltd.) having a width of 1040 mm and a thickness of 15 μm is selected as the water-absorbing substrate film according to the present invention, and a gravure printing machine is provided on one surface thereof. After the endless printing of the word “surface” with the back side using a non-solvent laminator, a nylon long fiber non-woven fabric (product name “NIACE”) having a width of 1040 mm and a basis weight of 40 g / m ² on the opposite side of the printed surface. P0403WTO "(manufactured by Unitika Co., Ltd.) was applied with a two-component curable urethane resin-based solventless adhesive 1.2 g / m ² and bonded and aged at 35 ° C for 2 days. the printing surface, width 1040mm, the split-fiber non-woven fabric basis weight 38g / m ² (product name: "CLAF LX24", JX manufactured by Nippon Oil & ANCI Co., Ltd.) two to Curable urethane resin-based bonded by applying a solvent-free adhesive 2.1 g / m ^2, by aging for 2 days at 35 ° C., bonding was coated with a solvent-free adhesive nonwoven on both sides of the nylon film Moreover, the moisture-permeable film which bonded the nonwoven fabric on both surfaces of the water absorptive base film which concerns on this invention was obtained.
(Manufacture of disposable sheets)
Each 10 mm on both ends of the moisture permeable film was cut off with a slitter to a width of 1020 mm, and then cut into a length of 2050 mm with a cutting machine to obtain a disposable sheet.
As a result of sleeping on a mattress with the nylon nonwoven fabric surface facing up, the sheet is odorless, feels good, absorbs sweat well, and is flexible and well-familiar with the body. Since the nonwoven fabric was bonded to both sides, there was almost no sound generated when the film was bent, and it was possible to sleep comfortably.
Further, even if water is spilled on the sheet, not only does the water leak to the futon surface, but the moisture-permeable film of Example 1 is reinforced with a split fiber nonwoven fabric, so that it has very strong permeability. It was a wet film.
From these results, it is suggested that if the disposable sheet is used in a hospital or the like, labor of washing can be saved, and effects such as prevention of infection of workers and transfer of contaminants between sheets can be obtained. In particular, if it is used as a cover for a bed or stretcher used in an ambulance, blood and body fluids do not soak into cloths and cushions, which helps prevent inadvertent infections. It can also be moved from a stretcher to a bed or operating table.
(Manufacture of table covers)
The both ends of the moisture permeable film were cut off with a slitter to a width of 1020 mm, and then cut into a length of 1250 mm to obtain a table cover.
As a result of eating on a table of 900mm width and 1100mm length with the nylon non-woven surface of the table cover facing up, it feels odorless, does not affect the taste of food, and feels good with the elbows on the skin. In addition, not only does the table surface not get wet when water is spilled on the table cover, but the nylon non-woven fabric retains moisture, so that it is difficult for water to drip under the table and it is difficult to stain clothes. The following effects were also obtained.

(Example 5)
(Manufacture of moisture-permeable film)
A double-sided corona-treated biaxially stretched nylon film (product name “N1202”, manufactured by Toyobo Co., Ltd.) having a width of 940 mm and a thickness of 15 μm is selected as the water-absorbing substrate film according to the present invention, and a non-solvent is provided on one surface thereof. Using a laminator, a two-component curing type on the rough surface of rayon with a width of 940 mm and a basis weight of 30 g / m ² , a pulp mixed short fiber nonwoven fabric (product name “New Soflon L # 300”, manufactured by Unicharm Kokumi Non-Woven Co., Ltd.) A urethane resin solventless adhesive 1.2 g / m ² was applied and bonded together, and after aging at 35 ° C. for 2 days, on the remaining surface of the water-absorbent substrate film, a width of 940 mm and a basis weight of 40 g / m ² Core-sheath structure long-fiber polyethylene nonwoven fabric (product name “Elves S0403WDO”, manufactured by Unitika Ltd.) and two-component curable urethane resin solventless adhesive 1.5 / M ² and bonded by applying, by aging for 2 days at 35 ° C., was coated with a solvent-free adhesive nonwoven fabric laminated on both surfaces of the nylon film, both surfaces of the water-absorbing base material film according to the present invention The moisture-permeable film which bonded the nonwoven fabric to was obtained.
(Manufacture of pillow covers)
After making a width of 920 mm by cutting off both ends of the moisture-permeable film with a slitter to make a width of 920 mm, a pillow bag having a length of 650 mm, a width of 450 mm, and a seal width of 10 mm is manufactured using the polyethylene nonwoven fabric surface as a heat seal surface. Got a pillowcase.
As a result of storing the pillow in the pillow cover and using it at bedtime, the touch was good and comfortable sleep was obtained.
Moreover, when the water pillow was directly stored in the pillow cover and used as a water pillow cover, the water pillow did not give any rubber odor, and the rubber feel was not good.
(Manufacture of seat covers)
Using the polyethylene nonwoven fabric surface of the moisture-permeable film as a heat seal surface, a bag bag (two-sided seal bag) having a length of 450 mm, a width of 400 mm, and a seal width of 10 mm was manufactured using a bag making machine to obtain a seat cover.
As a result of using the seat cover on the backrest of a sofa for one person, the touch was good, there was no adhesive odor, and a supple feeling of use was obtained. Moreover, even when used as a chair cover or table cover, it absorbs sweat well without stuffiness, feels good, does not cause an adhesive odor, and exhibits a supple use feeling.

(Comparative Example 3)
(Manufacture of comparative film)
As a water-absorbing substrate film according to the present invention, a double-sided corona-treated biaxially-stretched nylon film (product name “N1202”, manufactured by Toyobo Co., Ltd.) having a width of 940 mm and a thickness of 15 μm is selected. Using a non-solvent laminator, a two-component curable urethane resin solventless adhesive is applied at a rate of 2.0 g / m ^{2, and} a rayon having a width of 940 mm and a basis weight of 30 g / m ^{2 is} applied to the coated surface. A rough surface of a non-woven fabric (product name “New Soflon L # 300”, manufactured by Unicharm Kokumi Non-Woven Co., Ltd.) is bonded and aged at 35 ° C. for 2 days, and then the remaining surface of the water-absorbent substrate film is cured in two parts -Type urethane resin solventless adhesive 2.2g / m ² is applied, and the core-sheath structure long fiber polyethylene non-woven fabric with a width of 940mm and basis weight of 40g / m ² 0403WDO "(manufactured by Unitika Ltd.) and aged at 35 ° C. for 2 days to obtain a comparative film in which an adhesive was applied to both sides of the nylon film and a nonwoven fabric was bonded.
(Manufacture of pillow covers)
After making a width of 920 mm by cutting off both ends of the moisture-permeable film with a slitter to make a width of 920 mm, a pillow bag having a length of 650 mm, a width of 450 mm, and a seal width of 10 mm is manufactured using the polyethylene nonwoven fabric surface as a heat seal surface. Got a pillowcase.
As a result of storing the pillow in the pillow cover and using it at bedtime, the touch was good, but the water absorption of the nylon film is somewhat hindered because the adhesive is applied to the entire surface of the nylon film, I felt stuffiness.

(Example 6)
(Manufacture of moisture-permeable film)
A double-sided corona-treated biaxially stretched nylon film (product name “ONMB”, manufactured by Unitika Ltd.) having a width of 1040 mm and a thickness of 15 μm is selected as the water-absorbing substrate film according to the present invention, and a non-solvent laminator is provided on one side thereof. A two-component curable urethane resin-based solventless adhesive 1.0 g / m ^{2 on} a nylon long fiber nonwoven fabric (product name “NIACE P0303WTO”, manufactured by Unitika Ltd.) having a width of 1040 mm and a basis weight of 30 g / m ^2. After coating and laminating and aging at 35 ° C. for 2 days, the molten polyethylene resin was linearly thickened from the many nozzles of the T-die while applying the anchor coating agent to the remaining surface of the water-absorbent substrate film. A core-sheath long fiber polyester having a width of 10 μm and a basis weight of 30 g / m ² , extruded in a number of lines in parallel at intervals of 2 mm with a width of 50 μm and a width of about 2 mm. Nylon non-woven fabric (product name “Elves S0303WDO”, manufactured by Unitika Ltd.) is bonded to one side of the nylon film with a non-solvent adhesive applied to the non-woven fabric, and the other side of the nylon film is linear. The moisture-permeable film which bonded the nonwoven fabric on both surfaces of the water-absorbent base film according to the present invention, in which the nonwoven fabric was bonded by extrusion lamination with a molten thermoplastic resin extruded in parallel with each other, was obtained.
(Manufacture of protective clothing fabric)
The both ends of the moisture-permeable film were cut off with a slitter to obtain a protective clothing fabric having a width of 1020 mm.
The protective clothing fabric is cut into 300 mm length and 300 mm width, the polyethylene non-woven fabric surfaces are overlapped with each other, and a glove-type hot plate with a seal width of 1 mm is applied using a tray sealer to perform heat sealing at 170 ° C. for 2 seconds. After that, unnecessary parts were cut off and turned over to obtain gloves. The glove was strong and soft to the touch and could be used comfortably because it did not stuffy. In addition, since a nylon film was used for the intermediate layer, perfect bacteria impermeability was obtained.

(Example 7)
(Manufacture of moisture-permeable film)
A double-sided corona-treated biaxially stretched nylon film (product name “ONB”, manufactured by Unitika Ltd.) having a width of 1040 mm and a thickness of 15 μm is selected as the water-absorbing substrate film according to the present invention, and a non-solvent laminator is provided on one side thereof. A two-component curable urethane resin-based solventless adhesive 1.0 g / m ^{2 on} a nylon long fiber nonwoven fabric (product name “NIACE P0303WTO”, manufactured by Unitika Ltd.) having a width of 1040 mm and a basis weight of 30 g / m ^2. After bonding and bonding, and aging at 35 ° C for 2 days, the remaining surface of the water-absorbent substrate film is flash-spun and thermal bond with a width of 1040 mm and basis weight of 59.5 g / m ² by spray hot melt lamination. Polyethylene non-woven fabric (Product name “Tyvek 2FS”, Asahi DuPont Flashspun Products Co., Ltd.) A non-woven fabric coated with a solvent-free adhesive is bonded to one side of a nylon film, and the non-woven fabric is bonded to the other side by spray-type hot melt lamination. A moisture-permeable film having a nonwoven fabric bonded to both sides of the base film was obtained.
(Manufacture of protective clothing fabric)
The both ends of the moisture-permeable film were cut off with a slitter to obtain a protective clothing fabric having a width of 1020 mm.
The protective clothing fabric was cut into a length of 300 mm and a width of 300 mm, the polyethylene non-woven fabric surfaces were opposed to each other, overlapped, sewn to the contour of the glove with a sewing machine, cut out 2 mm outside the stitches and turned over to obtain a glove. The glove has a strong seam, has a good touch and does not stuffy, so it can be used comfortably. In addition, since there was a seam, perfect bacteria impermeability could not be obtained. However, if the seam is lined with tape, the bacteria impermeability can be obtained, which is very excellent as a fabric for protective clothing.

(Example 8)
(Manufacture of moisture-permeable film)
A double-sided corona-treated biaxially stretched nylon film (product name “ONMB”, manufactured by Unitika Ltd.) having a width of 1040 mm and a thickness of 15 μm is selected as the water-absorbing substrate film according to the present invention, and a non-solvent laminator is provided on one side thereof. Nylon long fiber nonwoven fabric with a width of 1040 mm and a basis weight of 30 g / m ² (product name “Cot Ace C040S / A01”, manufactured by Unitika Ltd.) 1.5 g of a two-component curable urethane resin solventless adhesive / M ² was applied and bonded, and after aging at 35 ° C. for 2 days, the remaining surface of the water-absorbent substrate film was sprayed with a hot-melt resin coating amount of 3.0 g / m ^{2 to} obtain a width of 1040 mm. , A core-sheath structure long-fiber polyethylene non-woven fabric having a basis weight of 30 g / m ² (product name “Elves S0303WDO”, Unitika Ltd.) In the present invention, a non-woven fabric is coated with a solventless adhesive on one side of the nylon film, and the non-woven fabric is pasted on the other side of the nylon film by spray hot melt lamination. The moisture-permeable film which bonded the nonwoven fabric on both surfaces of the water absorbing base film which concerns is obtained.
(Manufacture of futon cover) Prevention of mite intrusion Cut the moisture permeable film to a length of 1520 mm, fold it in half along the longitudinal center line so that the polyethylene nonwoven fabric is the inner surface, and the dimension between seals at both ends of the folded part A heat seal was applied with an impulse sealer having a width of 1 mm to 1500 mm to form a bag shape, and a collar portion of the futon cover was manufactured.
Next, two pieces of the moisture permeable film are cut into a length of 1520 mm, overlapped so that the polyethylene nonwoven fabric becomes the inner surface, and heat sealed with a 5 mm width with an impulse sealer so that the dimension between the seals is 1500 mm at both ends in the vertical direction. The body of the futon cover was manufactured.
Further, the moisture permeable film is cut into a length of 1520 mm and a width of 650 mm, and the polyethylene nonwoven fabric is overlapped so as to be the inner surface, and heat seal with a width of 5 mm with an impulse sealer so that the dimension between the seals is 1500 mm at both ends in the vertical direction. The end of the futon cover was manufactured.
The collar part and the end are turned over and inserted so as to overlap with the opening on both sides of the body part by 10 mm, and a heat seal of 5 mm width is applied to the overlapping part with an impulse sealer over the entire width to join the three parts. A large bag structure having a width of about 1500 mm and a length of about 2130 mm was formed, and a hook-and-loop cover was obtained by sewing a hook-and-loop fastener over the entire width of the polyethylene nonwoven fabric at the end opening and turning it over.
A comforter was placed in the futon cover, and the hook-and-loop fastener was closed to use at bedtime. As a result, sweat was absorbed well without stuffiness, the feel of the collar was good, there was no odor, and a comfortable sleep was obtained. In addition, the other end of the futon cover is sealed, and the moisture-permeable film is not breathable, so there is no fear that mites inside the futon will come out near the face, and cotton has an allergic reaction. Since it does not occur, it can be suitably used as a bedding for asthma patients by using the futon cover also on the mattress.

  According to the present invention, by using a non-woven fabric made of water-absorbing fibers, a large amount of water vapor permeation and moisture absorption in a short period of time, excellent bonding strength with the non-woven fabric, no solvent odor, A moisture-permeable film excellent in touch and hygienic can be obtained, and a moisture-permeable film suitable for use in contact with the human body or use on the body can be provided. By using this moisture-permeable film, it has traditionally been used in bodywear such as protective clothing fabrics, furniture covers such as seat covers, chair covers, and table covers, and bedding covers such as futon covers, sheets, and pillow covers. There can be no excellent products. Also, by adhering a nonwoven fabric composed of a water-absorbing substrate film and non-absorbent fibers, surface protection is suitable for protecting dry objects because water does not pass but water vapor passes and the nonwoven fabric surface hardly contains moisture. A film can be obtained.

DESCRIPTION OF SYMBOLS 1 Moisture permeable film 2 Nonwoven fabric 3 Adhesive 4 Water-absorbing base film 5 Fiber 10 Non-sol laminator 11 Pickup roll 12 Coating roll 13 Nip roll 14 Pressure roll

Claims (8)

One of the two-component cured on the surface urethane resin solventless adhesive of the nonwoven fabric was coated, by attaching the water-absorbent substrate film on the adhesive coated surface, the water absorbing substrate film in a bonding surface A moisture permeable film, wherein an exposed portion is formed without adhering the adhesive.   The water-absorbing base film is a plain cellophane film, nylon film, polyvinyl alcohol film, MXD nylon coextruded nylon film, MXD nylon blend nylon film, ethylene / vinyl alcohol copolymer coextruded nylon film, hydrophilic oxygen barrier layer coat The moisture-permeable film according to claim 1, wherein the film is made of either a nylon film or an ethylene / vinyl alcohol copolymer film.   The moisture permeable film according to claim 1, wherein the nonwoven fabric is made of nylon or cotton, or water-absorbing fibers of mixed fibers of rayon and pulp.   Using the film according to any one of claims 1 to 3, the other surface of the moisture-permeable film in which the nonwoven fabric is bonded to one surface of the water-absorbent substrate film, and further two-component curing on one surface A moisture-permeable film, wherein a non-woven fabric coated with a type urethane resin solventless adhesive is bonded together.   Using the film according to any one of claims 1 to 3, on the other surface of the moisture-permeable film in which a nonwoven fabric is bonded to one surface of the water-absorbent substrate film, A moisture-permeable film characterized in that a nonwoven fabric is bonded together by either means of hot melt lamination in which a melt resin is partially applied or extrusion lamination with a molten thermoplastic resin extruded in a straight line in parallel. A furniture cover such as a seat cover, a chair cover, and a table cover, and a bedding cover such as a futon cover, a sheet, and a pillow cover, each comprising the moisture permeable film according to any one of claims 1 to 5.   The moisture permeable film according to claim 1, wherein the nonwoven fabric is made of a polyethylene terephthalate long fiber nonwoven fabric or a non-water-absorbing fiber of a polyethylene nonwoven fabric of a flash spinning / thermal bond method. . Claim 1, claim 2, consisting of moisture-permeable film according to claim 7, the surface protective fill beam.

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