JP3281066B2 - Adhesive tape for protecting clothing and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive tape, and more particularly, to a pressure-sensitive adhesive tape applicable to applications requiring a moisture-permeable function.

[0002]

2. Description of the Related Art Adhesive tapes have been developed for new uses with the recent improvement in performance and are being used in various fields. One example is a protective tape for clothing. This protective tape, like general adhesive tape,
It consists of a support and a pressure-sensitive adhesive layer, and is attached to a portion where the dirt is easily worn away, such as a collar or cuff, when the garment is worn, thereby protecting the garment from dirt and friction. By using this, abrasion of clothing fibers due to friction and washing fatigue can be reduced, which is advantageous for keeping the life of clothing, especially shirts and suits.

When a protective tape for clothing is attached to clothing and worn, an adhesive layer is interposed between the support and the clothing in contact with the skin, and generally used adhesives are hydrophobic. Therefore, the pressure-sensitive adhesive layer hinders the moisture permeability function of the garment fiber, so that the water radiated from the human body cannot be released to the outside of the garment, resulting in discomfort when wearing the garment. Further, as a result, the support tends to collect moisture all the time, and the water replenishing ability of the support is reduced, so that it is not possible to sufficiently absorb sweat when sweating.

If the adhesive itself is made hydrophilic in order to solve the above problems, the adhesive swells or changes its adhesiveness due to water absorption, and the adhesive adheres to clothing after the tape is peeled off. The agent remains. Further, there is also a case where the sweat or the like absorbed in the support is allowed to pass through the garment as it is and the garment is not protected. Therefore, there is a demand for a pressure-sensitive adhesive tape capable of securing moisture permeability while maintaining the performance of the pressure-sensitive adhesive.

[0005]

As described above, the conventional pressure-sensitive adhesive tape has a problem that it does not have a sufficient moisture-permeable function.

The present invention has been made to solve such problems of the prior art, and provides an adhesive tape capable of exhibiting a moisture-permeable function without deteriorating the performance of the adhesive, and a method for producing the same. It is intended for.

[0007]

Means for Solving the Problems and Actions In order to achieve the above object, the present inventors have conducted intensive studies and found that the pressure-sensitive adhesive layer has a moisture-permeable function by being connected to one side and the other side of the layer. It has been found that it is promising to provide a portion, and the inventors have invented the pressure-sensitive adhesive tape of the present invention and a method for producing the same.

[0008] The pressure-sensitive adhesive tape of the present invention comprises a pressure-sensitive adhesive layer and a porous support, and the pressure-sensitive adhesive layer is provided with a moisture-permeable portion communicating with one side and the other side of the pressure-sensitive adhesive layer.

Further, the method for producing a pressure-sensitive adhesive tape of the present invention comprises a step of including water in a fibrous porous body, a step of mixing the fibrous porous body containing water with a pressure-sensitive adhesive, and the step of using the mixture. Forming a pressure-sensitive adhesive layer containing a fibrous porous body on one side of the support, and removing water contained in the fibrous porous body.

Further, the method for imparting a moisture-permeable function of an adhesive layer in an adhesive tape having an adhesive layer according to the present invention is characterized in that a fibrous porous body is incorporated into the adhesive layer and one side and the other side of the adhesive layer are provided. Is provided in the pressure-sensitive adhesive layer.

Hereinafter, the tape of the present invention will be described.
The term "pressure-sensitive adhesive tape" used in the present invention has a broad meaning meaning a thin layer having a pressure-sensitive adhesive layer, and is not limited by size or shape.

As shown in FIG. 1, the adhesive tape 1 according to the present invention comprises a support 3 made of a porous material that absorbs sweat, lipids and the like secreted from the skin, and an adhesive 5. The pressure-sensitive adhesive layer 5 has a two-layer structure, and is provided with a moisture-permeable portion that allows moisture to pass between both sides of the pressure-sensitive adhesive layer. Specifically, the support 3 is attached to the adherend 9, that is, clothing by the adhesive layer provided with the void 7 penetrating the adhesive layer, and the void is provided on the support layer side and the clothing side. 7
Are connected to each other, moisture in the support can be transferred to the clothes through the gap. This gap can be easily formed by providing a gap of a suitably adjusted size using a method such as dot coating when applying the adhesive to the support. The shape of the void 7 can be changed as needed, and may be distributed in a spot-like manner.
It may be formed in a groove shape. When it is formed in a spot shape, it is formed in a cylindrical shape with an inner diameter of about 0.5 to 2 mm, and when it is formed in a groove shape,
It is preferable that the width of the groove is about 1 to 3 mm. If the size of the void portion is too large, it is not preferable because sweat or the like saturated with the support easily migrates directly to clothing.

With the above structure, a moisture-permeable function can be imparted to the pressure-sensitive adhesive layer. Therefore, any pressure-sensitive adhesive which does not become brittle with water can be used for forming the pressure-sensitive adhesive layer. For example, a rubber-based adhesive containing natural rubber, recycled rubber, SBR, polyisobutylene rubber, polyisoprene rubber, or the like as a main component; acrylic acid, methyl acrylate, ethyl acrylate, 2-hydroxyethyl acrylate, butyl acrylate, 2-ethylhexyl Acrylic pressure-sensitive adhesives whose main component is a polymer or copolymer of acrylic monomers such as acrylate, octyl acrylate, methacrylic acid, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, iso-butyl methacrylate; Both can be used. If necessary, tackifiers, softeners, fillers,
Secondary materials such as an antioxidant and a crosslinking agent can be added.

The porous material constituting the support 3 may be any material capable of absorbing sweat, fat, etc., and woven fabric, nonwoven fabric, foam and the like can be used. Examples of woven and nonwoven fabric materials include various fibers such as rayon, polyethylene, polyester, polypropylene, nylon, acrylic, vinylon, cotton, hemp, silk, wool, and composite fibers thereof. As the nonwoven fabric, any one obtained by a general production method such as a spun bond method, a melt blow method, a flash spinning method, a needle punch method, a permeation method, and a papermaking method can be arbitrarily used. Polyurethane foams obtained by polyaddition of various polyols and polyisocyanates can be used as the foams.Polypropylene glycol, polypropylene triol, polyethylene adipate and the like are used as raw materials for the high molecular weight hydroxy compound, and And diisocyanates.

Considering that the support is to be adhered to clothing, it is preferable that the support is light, flexible and high in water absorption. For example, in the case of polyurethane foam, the specific gravity is about 0.01 to 0.06 g / cm. ³ , thickness about 0.5-2.0mm
Is desirable, in the case of a non-woven fabric, a basis weight of about 10 to 150 g
/ M ² and a thickness of about 0.05 to 1.5 mm. In the case of a woven cloth, it can be appropriately selected from cloths that are widely used.

FIG. 2 shows an embodiment of a pressure-sensitive adhesive tape obtained by further improving the above basic structure. In this pressure-sensitive adhesive tape 11, a fibrous porous body 17 is incorporated in the pressure-sensitive adhesive layer 15 for forming voids. Since fibrous porous materials can exhibit moderate strength, by incorporating this,
A gap having the same effect as the gap of FIG. 1 is formed, and
The strength of the pressure-sensitive adhesive layer can be compensated. In addition, the fibrous porous body also has an effect of gradually permeating moisture to the clothing side through the small gap and evaporating a small amount of the moisture out of the clothing. At this time, the dirt and fats in the support 13 do not permeate like water, and rarely seep out to the clothes 9 side. Therefore, the water replenishing ability of the tape support is substantially increased. As the material of the fibrous porous body, for example, particles obtained by crushing rice chaff, straw, wood chips, fibrous waste of vegetable food products, raw silk chips, wool chips, and the like can be used. Among them,
Vegetable fiber materials are effective and preferred in the above respects.

The pressure-sensitive adhesive layer shown in FIG. 2 is formed by mixing particles of a fibrous porous material with a pressure-sensitive adhesive and applying the mixture to a support by a commonly used technique such as coating, laminating, or transferring. In this case, the pressure-sensitive adhesive enters the interior of the fibrous particles and is likely to cause clogging. In order to prevent this, it is preferable to coat and protect the fibrous porous material particles with water before mixing. As a specific example, water is impregnated into the fibrous porous material particles, and then uniformly mixed with a solventless pressure-sensitive adhesive or a solvent-type pressure-sensitive adhesive, and directly or directly onto a support using a release paper by a transfer method. After the work, there is a method of heating or reducing the pressure to vaporize and remove water. Alternatively, a mixture of fibrous porous particles dispersed in an aqueous solvent and an emulsion-based adhesive may be applied to a support. The water used to protect the fibrous porous material particles may contain an organic solvent or other substance as long as the water can prevent penetration of the pressure-sensitive adhesive into the particles.

The fibrous porous body 17 needs to be arranged in the pressure-sensitive adhesive layer so that its voids are continuous with the outside of the pressure-sensitive adhesive layer 15, and as a method for this, as shown in FIG. In addition, the size of the fibrous porous material particles may be made substantially equal to the thickness of the pressure-sensitive adhesive layer. Even if the particles are slightly larger than the thickness of the pressure-sensitive adhesive layer, if the protruding ends are not so large, the fitting can be performed by elastic deformation of the porous support or the like. Actually, a sufficient effect can be obtained by using an elongated shape obtained by cutting fibers longer than the thickness of the pressure-sensitive adhesive layer. In the above configuration, the thickness of the pressure-sensitive adhesive layer is preferably about 15 to 80 μm, and the size of the fibrous porous material particles is about 15 to 210 in terms of fiber length.
μm is a suitable range. However, the method of communicating the voids on both sides is not limited to the above-described configuration. For example, a configuration in which a plurality of porous particles are connected by the voids and communicate on both sides of the pressure-sensitive adhesive layer is also possible.

The upper limit of the water absorption of the support is, for example, about twice as high as the specific gravity of the nonwoven fabric when the nonwoven fabric is used.
In order to increase the water absorption capacity of the support, for example, a water-absorbing polymer obtained by cross-linking an acrylic resin with a highly hydrophilic polymer is impregnated into the support of the adhesive tape, or as shown in FIG. The two water-absorbing polymers 24 can be laminated and sandwiched between two supports 23 on the base 21. When impregnating with a water-absorbing polymer, about 30 to 200 parts by weight of a water-absorbing polymer is dispersed and impregnated in 100 parts by weight of a solvent such as toluene, ethyl acetate, normal hexane, kerosene, and carbon tetrachloride. When laminating, it is laminated using an acrylic binder, a urethane-based binder, a vinyl acetate-based binder, a rubber-based binder and the like in an amount of about 10 to 50 parts by weight based on 100 parts by weight of the water-absorbing polymer. Multiple layers may be laminated, or the impregnation method and the lamination method may be used in combination.

When the above-mentioned pressure-sensitive adhesive tape is manufactured as a tape for protecting clothing, it is preferable to leave an uncoated portion with a width of about 3 to 10 mm at the end instead of forming a pressure-sensitive adhesive layer on the entire surface of the porous support. . With this configuration, when the adhesive tape is peeled off, the adhesive is less likely to remain on the clothing, and the adhesive is exposed at the end of the support, so that dust and the like can be prevented from adhering.

The pressure-sensitive adhesive tape of the present invention is preferably carried on a release sheet in order to facilitate transportation and handling. The release sheet can be arbitrarily selected from commonly used ones. For example, paper such as high-quality paper, glassine paper, parchment paper, etc .; synthetic resin films such as polyethylene, polyethylene terephthalate, polypropylene, polyvinyl chloride; sheets such as metal films such as aluminum foil were subjected to release treatment with resin, silicone, etc. Things can be used.

The above-mentioned method of imparting a moisture-permeable function to the pressure-sensitive adhesive layer by incorporating the fibrous porous body is not limited to the above-mentioned clothing protection tape, but also to an adhesive tape used in a state requiring a moisture-permeable function, for example, It can also be used for a tape used in a state of touching the human body, such as a bandage.

[0023]

The present invention will be described in more detail with reference to the following examples.

Example 1 An adhesive solution 1 in which an acrylic adhesive (trade name: KH54, manufactured by Konishi Co., Ltd.) was dissolved in toluene at a concentration of 45% by weight.
kg, and 300 g of rice hulls with a fiber length of 170 μm
And dispersed in 500 ml of water. The above-mentioned pressure-sensitive adhesive solution and the rice husk dispersion liquid are mixed well, and 100 g of the mixture is 100 cm in length, 100 cm in width, 0.3 mm in thickness, and 50 g in basis weight.
m ² of rayon fiber nonwoven fabric (trade name: Hibon, manufactured by Shinwa Corp.) was applied to obtain a pressure-sensitive adhesive tape was dried for 1 minute at 100 ° C.. The obtained pressure-sensitive adhesive tape had a pressure-sensitive adhesive layer having a thickness of 45 μm.

The above-mentioned adhesive tape is cut into a square of 5 cm in length and width, a cotton cloth of 2 cm in length and width is filled with 10 g of water, placed on a glass plate, and a piece of adhesive tape is stuck so as to completely cover the cotton cloth. did. After measuring the weight, the glass plate was placed on a hot plate and heated at 30 ° C. for 1 hour, and the weight was measured again. As a result, the weight was reduced by 0.2 g.

Comparative Example 1 kg of the same adhesive solution as in the example was applied to the same nonwoven fabric as in the example without adding the rice hull dispersion, and dried to obtain an adhesive tape having an adhesive layer having a thickness of 45 μm. . This was cut into a square of 5 cm in length and width as in the example.

Using the obtained pressure-sensitive adhesive tape piece, a cotton cloth containing water was covered and adhered to a glass plate in the same manner as in the example, and the weight before and after heating was measured.
It was not detected on a 0 mg scale.

From the above results, it is clear that incorporating the fibrous particles imparts a moisture-permeable function to the pressure-sensitive adhesive tape, and the tape according to the present invention is suitable for use in contact with the human body or the like. Understand.

[0029]

As described above, the pressure-sensitive adhesive tape of the present invention is advantageous for application to applications requiring moisture permeability, is excellent in economic efficiency and the like, and has an industrial value. Is extremely large.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the pressure-sensitive adhesive tape material of the present invention.

FIG. 2 is a sectional view showing another embodiment of the pressure-sensitive adhesive tape material of the present invention.

FIG. 3 is a sectional view showing another embodiment of the pressure-sensitive adhesive tape material of the present invention.

[Explanation of symbols]

 Reference Signs List 1 adhesive tape 3 support 5 adhesive layer 7 void 9 adherend 17 fibrous porous material 24 water-absorbing polymer

Continuation of the front page (56) References JP-A-6-65397 (JP, A) JP-A-1-104801 (JP, A) JP-A-3-258839 (JP, A) JP-A-54-166727 (JP) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) C09J 7/04 A41B 1/00-17/00

Claims (4)

(57) [Claims] 1. An adhesive layer , capable of absorbing secretions from the skin.
Clothing with a porous support that can be attached to clothing
A use adhesive tape, clothing protecting adhesive tape Breathable portion comprising a fibrous porous body to communicate <br/> communication between the one side and the other side of the adhesive layer is provided on the adhesive layer. Wherein the upper Ki繊維性porous body through stain water
The adhesive tape for protecting clothing according to claim 1 , wherein the adhesive tape is a vegetable fiber material, and the adhesive layer has water resistance . 3. A step of including water in the fibrous porous body;
Mixing a fibrous porous body containing water with an adhesive,
Forming a layer of a pressure-sensitive adhesive containing a fibrous porous material on one side of a support capable of absorbing secretions from the skin using the obtained mixture; and and a step of removing water contained in the body, clothing according to claim 1, wherein
Manufacturing method of protective adhesive tape. 4. The pressure-sensitive adhesive has a water-resistant emuljo
And the fibrous porous body is a vegetable fiber material
The method for producing an adhesive tape for protecting clothing according to claim 3, which is
Law .