The present invention relates to a wig suitable to hair fashion or hair enrichment as a typical purpose and in particular relates to double-stick adhesive tape used to fix a wig onto a head, and to a wig using said double-stick adhesive tape.
A wig is, in general, made up with a wig base mainly comprising artificial skin made of soft plastic material or net member and a number of hairs implanted to said wig base. If ventilation and lightness are aimed when a wig is worn, it has to be taken into consideration to make the weight of hair implanted to a wig base lighter, as well as how to make lighter the weight of a wig base. In order to make a lighter wig base, various technical developments have been tried, such as taking off a part of a wig base made of artificial skin, for example, a top part or both side parts, and connecting net member to said taken off part, thus making a wig base having partial net member, or making a whole wig base with net member, and reinforcing the rim by fringing with artificial skin made of synthetic plastics. Also, there are various wig bases such as that the hair line region of which is made of net member in order to attain the lightness and ventilation of a wig, and natural looking of hair line, as disclosed, for example, in Japanese Patent Preliminary Publication No. JP S62-215002A.
Meanwhile, in order to wear such a wig on a head, the backside of a wig base and the head must be firmly bonded with bonding means so that the wig does not scoot from the head or come off easily. As the conventional bonding means, commercially available liquid or viscous adhesive, commercial double-stick adhesive tape, or a clip specifically for binding a wig have been used, and a wig is fixed on to a head by either of these means. Put-on and take-off of a wig are made easier by using a clip specifically for binding a wig. A typical clip is such that fixes the inversion part provided with a plurality of comb-tooth like tips to the backside of a wig base, and binds to the wearer's own hair by inserting said tips to the hair, and utilizing the inversion action of the inversion part. Such a clip is not suitable to the case that the remaining hair is few at the fixing position of the head, since it is to utilize the wearer's own hair.
When liquid or viscous adhesive is used to bond a wig to the head, since it is applied between the head skin and the backside of a wig base and bond them, these for medical application which are inactive to skin and do not tend to cause such inflammation as rash are used. However, when a wig is taken off, since the adhesive stuck on the head skin has to be removed with peeling agent such as thinner, the skin tends to be damaged both physically and chemically, and taking-off itself is laborious.
In case of double-stick adhesive tape, peeling agent is almost not required, and put-on and take-off of a wig are easier than the case using liquid or viscous adhesives. As double-stick adhesive tape, a core material of polyethylene film of about 30 μm thickness is commercially available, of which both faces are coated with adhesive, and bonded with peeling paper, and which is rolled up. Said rolled up double-stick adhesive tape is cut to appropriate length, and the peeling paper is removed. Then one side of adhesive faces is bonded to the reinforcing material made of plastics attached to the backside of a wig base made of artificial skin or of net member, for example, at four places forth and back, left and right, and the other side of adhesive faces is bonded to the head skin or the hair so that the wig is fixed. As the layer thickness of the adhesive of double-stick adhesive tape, about 30 to 50 μm of low allergic acrylic medical adhesive is usually used, and is applied evenly to both sides of said core material.
In case that a whole or a part of a wig base is made of net member (This may be called hereinafter a net base.), the filament of nylon, polyester, or the like with diameter of about 100 to 150 μm as net base is used, and a sheet with network having rhomboidal or rectangular spaces is formed with said filament, a net base is formed with said sheet to a shape fit to the wearer's head shape, and a wig is made up with said net base with a number of hair implanted thereto. A wig wearer pulls outward the periphery of a net base so that it does not wrinkle or loosen, and fixes on to the head using a binder attached to the desired position of the backside of a net base, liquid or viscous adhesive applied to the head skin, or double-stick adhesive tape.
Since a wig is thus worn by pulling a net base in peripheral direction by applying external force, excess pulling tension is applied to the net base comprising thin filaments, thereby the net base may be distorted or broken. Therefore, it is required to fix the reinforcement member made of more or less hard plastics to the certain portion of a net base where load tends to be applied, particularly to its peripheral portion. Further in addition, in order to apply adhesive or attach a clip to the desired portion of the backside of a net base, it is necessary to make a bonding seat as the bonding means with another material such as soft plastics or cloths, and to fix said bonding seat to the predetermined portion of the backside of net base. Since said bonding seats are for attaching adhesive or a clip, they are generally made thick of another broad plastics or cloths, and are sewn firmly to several peripheral portions of the backside of a net base, thereby these parts can not help but become heavy and thick. Also, by setting the above-mentioned reinforcement members or bonding seats to a net base, the network of these parts are choked, thereby ventilation is interfered, and causes stuffiness, distortion, or deterioration.
Thus, it is preferred not to provide reinforcement members or bonding seats, in case lightness and ventilation of a net base are to be considered as important. If, for this reason, a bonding means is to be attached directly to a net base without reinforcement members or bonding seats, nothing but double-stick adhesive tape can be used as such bonding means instead of instant adhesive or a clip. Because, if a clip is directly set to the filaments of small diameter making up net base, said clip must be bound and sewn to a plurality of filaments, holding tight the clip to wearer's own hair while pulling a net base to peripheral direction causes excess tension to thin filaments, which results in dissociation of cross points of filaments, cutting off the filaments themselves, and ultimately the breach of the net base. In addition, said clip can be easily seen through hairs from the outside of a wig. On the other hand, if head skin or hair and a net base are tried to be directly adhered with liquid or viscous adhesive, the filaments of a net base and the wearer's head practically contact only linearly, and only such linear contact between filaments and a head causes easy scooting from the head, and therefore is not suitable to practical use.
Therefore, the inventors tried to bond directly, by using the commercially available medical double-stick adhesive tape, one side of adhesive surfaces to the desired position of the backside of a net base. In this case, one side of adhesive surfaces of double-stick adhesive tape was bonded directly to each filament making up a net base, and the other adhesive surface of double-stick adhesive tape was bonded to a wearer's head skin and hairs. If a wig is firmly fixed to a head when thus bonded, then the reinforcing material of plastics or cloth and a bonding seat are not required to be attached to the backside of a wig base, and hence sufficient ventilation and also reducing weight can be attained.
However, the various repeated experiments by the inventors made it clear that the attempt of direct bonding of one side of adhesive surfaces of double-stick adhesive tape to net base resulted in bonding only on linear contact as in the case of liquid or viscous adhesive, since the cross section of a filament making up a net was circular. This is because the thickness of one side of adhesive layers of commercially available medical double-stick adhesive tape is about 30 to 50 μm, whereas the filaments of 100 to 150 μm are usually used since the filament making up net base needs certain strength, so that pressing the adhesive layer of double-stick adhesive tape to net base causes only linear bonding along one side of the filament with a circular cross section.
Also in addition to it, it became clear that, since the network formed among crossing filaments, that is, net mesh was vacant space, most of adhesive surface was not utilized, and bonding was effected only in linear direction of a filament, so that adhesion was weak, and the worn wig easily came off a head. This was also a case when the adhesiveness of double-stick adhesive tape was enriched. Thus, it was confirmed that applying commercially available medical double-stick adhesive tape to a wig of net base proved to be impractical, as the bonding of adhesive to net base was too weak.
A wig was also test made with said commercially available medical double-stick adhesive tape applied to the backside of a net base, and its worn state was observed from outside, then head skin could be seen through hairs implanted to the net base from the network of each crossing filament, and said smooth side of adhesive surfaces of double-stick adhesive tape shone through network of each filament, which was recognized by an observer as unnatural reflection, and the part of adhesive surface was seen as floating up white due to this glossiness, resulting in easy recognition of the presence of double-stick adhesive tape.
Thus, wearing a wig comprising a net base on a head by using double-stick adhesive tape proved to have such problems as, sufficient bonding force could not be attained because only linear adhesion to net base was effected, and since adhesive surface of double-stick adhesive tape was smooth, the light which passed through a wig reflected on said smooth adhesive surface of double-stick adhesive tape bonded on the backside of net base, causing the presence of double-stick adhesive tape to be recognized through the hair of a wig.
The objective of the present invention is, referring to the problems mentioned above, to provide double-stick adhesive tape for wig bonding having sufficient adhesive force to a wig base comprising a net base, whereas not easily visible upon wearing, as well as a wig provided with said double-stick adhesive tape which has good appearance.
In order to achieve the object mentioned above, a double-stick adhesive tape used for fixing a wig to a head in accordance with one form of the embodiments of the present invention is characterized at least one surface of the both adhesive surface layers is deglossed.
Said adhesive layer is deglossed preferably by forming its surface with minute concavity and convexity.
Said minute concavity and convexity on the surface of adhesive layer can be provided either by pressing said adhesive layer with a press having minute saliences, or formed by spray-coating granular adhesive on the surface of core material. Or said minute concavity and convexity on the surface of adhesive layer may be formed by blast processing. In case of blast processing, if finely crashed dry ice or ice is used, then since the blast material melts after finishing the concavity and convex process on the adhesive layer, said blast material does not remain on the adhesive layer.
The surface roughness of said minute concavity and convexity is made preferably larger than light wavelength, thereby, when one side of the adhesive surface of double-stick adhesive tape for wig bonding is bonded to the backside of a wig, the light incoming from the outside of the wig on to the adhesive surface of the double-stick adhesive tape reflects diffusely, thereby unnatural light is not generated.
According to another embodiments, the present invention is characterized by a double-stick adhesive tape used for fixing a wig onto a head comprising net member at least as a portion of a wig base, and at least one side of its double-stick adhesive layers is formed to have a thickness to bury more than half of a wire diameter of said net member.
Further, the present invention is characterized by the double-stick adhesive tape used for fixing the wig onto a head comprising a net member at least as a portion of a wig base, and at least one side of its double-stick adhesive layers is formed to have a thickness to bury more than half of a wire diameter of said net member, and a surface of said one side of adhesive layers is deglossed.
In the constitution mentioned above, the one side of said adhesive layers is preferably formed to have a thickness equal to, or more than the wire diameter of said net member which constitutes at least a part of the wig base, and the surface of this side of adhesive layers is deglossed, and the other side of said adhesive layers is formed to have the thickness equal to, or more than a hair diameter. The one side, or both sides of said adhesive layers are preferably formed to have the thickness in the range between 50 and 200 μm, respectively.
Further, the wig of the present invention is characterized in that it is the wig comprising: a wig base having a net member at least as a portion; hairs implanted to said wig base, and the double-stick adhesive tapes having adhesive layers on both sides of core material respectively, with one side of the adhesive layers bonded to said wig base, and with the other side of the adhesive layers bonded to a wearer's head; and the surface of said one side of the adhesive layers of said double stick adhesive tape is deglossed, and said deglossed side of the adhesive layers is preferably set inside of the network of net member of a wig base, and bonded to said net member.
In the constitution mentioned above, the surface of one side of adhesive layers of double stick adhesive tape is deglossed preferably by forming minute concavity and convexity on it.
In accordance with the present invention, since the one side of adhesive layers of double-stick adhesive tape is deglossed by forming minute concavity and convexity, when the light comes in from outside of the wig to the adhesive layer with minute concavity and convexity located on filament network making up net member, it reflects diffusely on said minute concavity and convexity by bonding said deglossed surface of adhesive layer to said net member from its backside of a wig base. Consequently, an unnatural gloss disappears, and bonding of double-stick adhesive tape to the backside of the wig is not visible from outside, thereby fine looking can be attained.
Further, a wig of the present invention is characterized in that it is the wig comprising: a wig base having a net member at least as a portion; hairs implanted to said wig base, and double-stick adhesive tapes having adhesive layers on both sides of a core material respectively, with one side of the adhesive layers bonded to said wig base, and with the other side of the adhesive layers bonded to a wearer's head; and said one side of the adhesive layers of said double stick adhesive tape is formed to have a thickness to bury more than half of a wire diameter of said net member, and said one side of the adhesive layers is set inside of the network of net member, and bonded to said net member.
Said surface of one side of adhesive layers of said double-stick adhesive tape is deglossed preferably by forming minute concavity and convexity on it.
One side of adhesive layers of said double-stick adhesive tape is preferably formed to have the thickness equal to, or more than a wire diameter of the filament making up net member, and the surface of said one side of adhesive layers is deglossed. The other side of adhesive layers of double-stick adhesive tape is also preferably formed to have the thickness equal to, or more than the hair diameter. One side, or both sides of said adhesive layers are preferably formed to have the thickness in the range between 50 and 200 μm.
By making thick at least the side to be bonded to net member of the adhesive layers of double-stick adhesive tape, so thick as to bury more than half of the wire diameter of the net member, the high adhesivity can be attained, since the adhesive comes inside the network of filaments making up net member, and adheres peripherally by wrapping each filament when the double-stick adhesive tape is bonded to net member from the backside of the wig.
The present invention will better be understood from the following detailed description and the drawings attached hereto showing certain illustrative forms of embodiment of the present invention. In this connection, it should be noted that such forms of embodiment illustrated in the accompanying drawings hereof are intended in no way to limit the present invention but to facilitate an explanation and an understanding thereof.
Hereinafter, a double-stick adhesive tape and a wig provided with the same in accordance with the present invention will be described with reference to certain suitable forms of implementation thereof illustrated in the drawing figures.
The partial wig 100 is made up by implanting hair 102 to a wig base 101 comprising a net member that makes up network as a whole. Although only a few attached hairs 102 are depicted in
Here, the wig base 101 of the partial wig 100 illustrated in
One method may be to use the flat sheet made of the filament 103 by plain weaving or tulle weaving to form the network 104 to form a bulge of cap shape along the desired head shape as the wig base 101, while another method may be to arrange filaments 103 as warp and weft, thermally fuse their cross points, and make it bulging in cap shape to form as a wig base 101.
The size of the network 104 made up by combination of warp and weft of the filament 103 may be arbitrarily selected depending upon the volume of implanted hair. Generally speaking, when the larger hair volume is desired, the smaller mesh may be adopted, and if the wearer's own hair is pulled out of mesh to be utilized by mixing up with the wig hair, then the mesh size may be made larger, for example, 1 cm2 or more. The hair 102 to be implanted may be connected to warp and weft of the filament 103, respectively, by knotting, bonding, or the like, and the hair 102 may be knotted to cross points in some cases. In any case, since the hair 102 cannot be implanted in the formed meshes 104 as a matter of course, the wearer's head (head skin and hair) is likely to be seen in the attached hair 102 through network 104 when the user wears a wig. Consequently, since the double-stick adhesive tape 10 adhering to net member from the backside of the wig base 101 can also be seen through attached hair 102, the gloss of adhesive face located on the network 104 of the filament 103 is problematical, but according to the present invention as mentioned later, the surface of adhesive face of the double-stick adhesive tape 10 has diffuse reflection by deglossing treatment, thereby unnatural gloss is not generated. Therefore, the presence of the double-stick adhesive tape 10 is less likely to be seen through the attached hair from the outside of the wig.
An embodiment of the double-stick adhesive tape in accordance with the present invention is explained referring to
As is clear from
Here, the core material 11 and the adhesive 12, 13 may be not necessarily transparent, but colored similarly to the head skin, or to the color of net base, for example, such as milk white or skin color, and are preferably provided with camouflage pattern with which the wig base is less recognizable from outside.
Deglossing of the surface of adhesive layers 12, 13 is effected by forming minute concavity and convexity 12a on the surface of said adhesive layers 12, 13 as shown in
Here are a few examples of forming minute concavity and convexity 12a, 13a on the surfaces of adhesive layers 12, 13 of the double-stick adhesive tape 10.
First mentioned is the method to form minute concavity and convexity on adhesive layer surface by applying the press having minute saliences on the surface to the adhesive layer surfaces 12, 13 or to release coated paper. Said press may be either plate type or a roller type, and has on its surface minute saliences of surface roughness sufficiently larger than light wavelength as mentioned above, for example, about 4 μm, and minute concavity and convexity 12a, 13a are formed by applying said press either directly on to the surfaces of adhesive layers 12, 13 of double-stick adhesive tape 10, or on to the release coated paper cohered on to adhesive layers.
The second method is to form minute concavity and convexity by spray coating the adhesive of suitable viscosity to core material 11 for double-stick adhesive tape 10. If the adhesive has suitable viscosity, it can stay on the core material surface as fine granules, so to form minute concavity and convexity.
The third method is to apply blast processing either directly on to the surfaces of adhesive layers 12, 13 of the double-stick adhesive tape 10, or on to release coated paper. In this case, by using not sand but fine particles of dry ice or ice as blast material, since dry ice or ice as blast material melts away after forming concavity and convexity on adhesive layers, blast material does not stay on the surfaces of adhesive layers 12, 13 or release coated paper.
By applying said methods appropriately, minute concavity and convexity can be formed on adhesive layer surfaces 12, 13 when double-stick adhesive tape 10 is manufactured, or after the commercially available double-stick adhesive tape 10 is obtained.
Further, the second characteristics of the double-stick adhesive tape 10 of the present invention is, as shown in
As the wig base 101, the wire diameter of the generally used filament 103 making up net member is about 100-150 μm as described above and at least the adhesive layer 12 of the double-stick adhesive tape 10 adhering said filament 103 is designed according to the present invention to have the thickness larger than at least half or more of the diameter of the filament 103, that is, thickness of 50-70 μm or more. Thus, by providing one side of adhesive layers 12 with thickness at least half or more of the diameter of filament 103, since about the lower half of filament 103 is wrapped and peripherally adhered in adhesive layer 12 when one side of adhesive layers 12 of the double-stick adhesive tape 10 is pressed to a net base, sufficient adhesive strength can be obtained compared with the prior case of linear adhesion.
Further preferably, one side of adhesive layers 12 of double-stick adhesive tape 10 is, as shown in
As shown in
On the other hand, the other side of adhesive layers 13 of the double-stick adhesive tape 10 to be bonded to a head may not be necessarily designed to have the thickness mentioned above and may be as thick as commercially available double-stick adhesive tape 10 in usual as about 30 μm. Because, since a head is relatively flat in general though somewhat with roughness, the other side of adhesive layer 13 adheres facially. However, in case that the other side of adhesive layers 13 is pressed and bonded on to the hair, it is preferred that the thickness of the other side of adhesive layer 13 is designed as about 50-150 μm so as to effect sufficiently the adhesivity to the head, the diameter of the hair being 50-100 μm in general taken into account.
Here in accordance with this embodiment, as shown in
In accordance with further preferable embodiment of the present invention, as shown in
When the double-stick adhesive tape 10 is adhered to the inside of the wig 100, high bondability can be maintained, since adhesive layer 12 comes into network 104 of the wig base 101, and is bonded by peripherally wrapping the periphery of filament 103. That is, since the adhesive layer 12 is designed to have the thickness of about half of the wire diameter of the net member of the wig base 101, or preferably equal to, or more than, that, it comes into network 104 of the net member, and firmly fixes a wig base 101, thereby bonding strength can be effectively enhanced.
Described are the certain examples and the comparative examples of a double-stick adhesive tape and a wig provided with the same.
The double-stick adhesive tape 10 is made with the transparent core material 11 made of polyethylene film of thickness 30 μm, on both sides of which low allergic and transparent acrylic adhesive is coated to 150 μm thick to form adhesive layers 12, 13. Deglossing effected on the surfaces of adhesive layers 12, 13 is by emboss finishing, and its surface roughness (Ra) to be about 4 μm.
Said double-stick adhesive tape 10 was bonded to the wig 100. As the wig base 101 of the wig 100, the plain-woven net was used made of filament 103 of nylon 6 of thread diameter 130 μm. The mesh size of net, that is, the opening indicating the distance between threads was 716.7 μm. The adhesive layer 12 of double-stick adhesive tape 10 is 150 μm thick, and has minute concavity and convexity on its surface by emboss finishing. Here, opening (μm) is expressed as Opening (μm)=25400/mesh (inch)−thread diameter.
Said wig 100 was worn by a tester person, and the adhesive strength and outlook observation of double-stick adhesive tape 10 were tested. The adhesive strength of the double-stick adhesive tape 10 to the net of the wig base 101, and to the tester's head skin and hair was both good, and no reflection of light from the surroundings on double-stick adhesive tape 10 was observed. Further, when another tester without a wig 100 observed, it was not recognized that a wig 100 was worn with double-stick adhesive tape 10, thereby the outlook turned out to be excellent.
Said double-stick adhesive tape 10 was bonded to a wig 100. As the wig base 101 of a wig 100, the net was used made of the cord of filament 103 of nylon 6 of thread diameter 93.3 μm. The mesh size 104 of net (opening) was 1700 μm.
Said wig 100 was worn by a tester, and the adhesive strength and outlook observation of double-stick adhesive tape 10 were tested. The adhesive strength of double-stick adhesive tape 10 to the net of the wig base 101, and to the tester's head skin and hair was both good, and no reflection of light from the surroundings on double-stick adhesive tape 10 was observed. Further, when another tester without a wig 100 observed, it was not recognized that a wig 100 was worn with double-stick adhesive tape 10, thereby the outlook turned out to be excellent.
For the double-stick adhesive tape of prior arts, deglossing was not conducted on the adhesive layer surface. Commercially available ordinary adhesive layers were formed with transparent core material 11 made of polyethylene film of thickness 30 μm, on both sides of which low allergic and transparent acrylic adhesive is coated to 50 μm thick, and release coated paper was cohered as protective film.
The conventional double-stick adhesive tape of Comparative Example 1 was bonded to a wig 100. As the wig base 101, the plain-woven net was used made of filament of nylon 6 of thread diameter 130 μm. The mesh size of net was 30 threads×30 threads/1 inch (2.54 cm).
Unlike the case of Example 2 of the present invention as shown in
The double-stick adhesive tape of Comparative Example 1 was bonded to a wig 100. As the wig base 101 of a wig 100, the tulle lace net was used made of thread of nylon 6 of thread diameter 130 μm. The mesh size of filament was 30 threads×30 threads/1 inch (2.54 cm).
Unlike the case of Example 3 of the present invention as shown in
Although certain suitable forms of embodiment of the present invention were explained as above, it should be noted that such forms of embodiment are intended in no way to limit the present invention but might be varied appropriately within the limitation of the present invention. For example, the case was explained where the surfaces of both adhesive layers 12, 13 of double-stick adhesive tape were deglossed, but at least either one side, especially the adhesive layer 12 to be arranged to the wig 100 side, may be deglossed. Also, the minute concavity and convexity for deglossing may be not limited to emboss finishing but of other shapes. Still also, though it is especially preferable to bond the double-stick adhesive tape of the present invention to the net member that is set at least at a part of a wig base, it is of course applicable as ordinary double-stick adhesive tape to a wig base of artificial skin.
Here, the double-stick adhesive tape of the present invention is not limited for wig fixing, but also applicable to various articles, especially effectively applicable to the cases to suppress the gloss of the bonded surface at the side seen from outside. Further, the numerical values indicated in the above-mentioned embodiments may be suitably varied as are necessary.
As is understood from the explanation described above, a double-stick adhesive tape for wig fixing of this type can be obtained with adhesive layers on both sides of a core material, preventing reflection of light by deglossing its surface, its bonding to the inside of a wig is not visible from outside, thereby good looking can be attained. Also, since one side of adhesive layers of the double-stick adhesive tape for bonding is made thick, the adhesive layer penetrates into the network of a wig base when said layer is bonded to the inner side of a wig, thereby high bondability can be attained since it is bonded to filaments not linearly but peripherally.
Number | Date | Country | Kind |
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2003-281367 | Jul 2003 | JP | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/JP04/10425 | 7/15/2004 | WO | 8/5/2005 |