JP2019123981A - Film for wig and wig cap with such film for wig - Google Patents

Abstract

To provide a film for a wig and a wig cap with such a film for a wig that reduce unpleasantness and discomfort caused to a user thereof.SOLUTION: The film 100 for a wig contains as its main component, polyurethane elastomer polymerized by a prepolymer method with difunctional di-isocyanate, difunctional polyol, and difunctional chain extender being mixed at a molar ratio of 2.00 to 1.10:1.00:1.00 to 0.10, and has a plurality of openings, the opening ratio, which is the ratio of the openings against the entire surface, being 10% to 90%.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wig film to be in contact with a scalp and a wig cap provided with the wig film.

  Wigs (wigs) are used in a wide variety of forms depending on the application, ranging from covering an entire head to partially covering a head.

  Generally, when wearing a wig, a wig cap (also called an inner cap or a wig base) is attached in advance (see, for example, Patent Document 1). The cap of Patent Document 1 is provided with an adjuster part capable of adjusting the size of the edge of the wig cap to the size of the user's head at a portion corresponding to the back of the head when the wig cap is attached. Is getting more.

JP, 2017-008448, A

  However, according to the above-mentioned prior art, the contact of the adjuster part of the wig cap was not comfortable for the user. Furthermore, the user may even feel pain due to tightening with the above-mentioned adjuster parts, which is not comfortable with the contact with the scalp. In particular, once the user wears the wig, since the user may keep wearing it for a long time, it is important to solve the above problem in view of the improvement of the ease of use of the wig by the user.

  Therefore, an object of the present invention is to provide a wig film and a wig cap provided with the wig film, which can reduce discomfort and incongruity felt by the user.

(1) A film for wigs according to the present invention is a film for wigs used in a wig cap and brought into contact with the scalp, wherein a bifunctional diisocyanate, a bifunctional polyol, and a bifunctional chain extender are molar. The main component is a polyurethane elastomer which is compounded in a ratio of 2.00 to 1.10: 1.00: 1.00 to 0.10 and is polymerized by a prepolymer method, and has a plurality of openings and an overall area The aperture ratio, which is the ratio of the total area of the apertures to the above, is 10% or more and 90% or less.

  According to the configuration of the above (1), when the film for this wig is used as a band (band) of the wig cap, the film for the wig realizes appropriate stretching (tightening) and appropriate friction with respect to the scalp By being formed of a material that can be done, the user does not feel the tightening strength and does not feel uncomfortable or uncomfortable. In addition, an effect of being lightweight and being excellent in air permeability is also exerted.

(2) In the film for wigs of said (1), it is preferable that the number of the said openings per unit area is 30 pieces / cm < ² > or more and 150 pieces / cm < ² > or less.

  According to the configuration of the above (2), it is possible to further reduce the discomfort and discomfort that the user has. In addition, the air permeability is more excellent and lighter.

(3) In the film for wigs of said (1) or (2), the molecular weight of said bifunctional diisocyanate is 174-303, The molecular weight of said bifunctional polyol is 300-2500, The chain extension of said bifunctional It is preferred that the agent is a diol or diamine having a molecular weight of 60 to 360.

  According to the configuration of the above (3), it is possible to further reduce the discomfort and discomfort that the user has.

(4) In the wig film of (1) to (3), the opening may have at least one shape selected from the group consisting of a circle, an ellipse, a cross, and a polygon. The polygons also include slit-like long and thin quadrilaterals.

  According to the configuration of the above (4), various openings can be provided according to the preference or constitution of the user.

(5) In the wig film of (1) to (3) above, it is preferable that no corner is provided in the opening.

  According to the configuration of the above (5), by not providing the corner in the opening, it is possible to avoid the occurrence of a crack that is likely to occur from the corner.

(6) A wig cap according to the present invention is a wig cap disposed on the inner side of a wig, having a peripheral edge provided with one end and the other end, and covering a head, a cap body, and the above-mentioned peripheral edge The film for wigs described in any one of the above (1) to (5), which is cross-linked to one end and the other end.

  According to the configuration of the above (6), since the wig film according to any one of the above (1) to (5) is provided, the user feels discomfort and discomfort when using the wig as compared with the conventional one. Can be significantly reduced. In addition, an effect of being lightweight and being excellent in air permeability is also exerted. Furthermore, when the film for the present wig contacts the scalp of the back of the head, which is relatively easy to stretch according to the movement of the head, the temperature of the scalp is transmitted, and the contraction of the film for present wig 100 is appropriately performed. Thus, the function of alleviating discomfort and discomfort which the user has conventionally works more.

(7) As another aspect, the wig cap according to the present invention is a wig cap disposed inside the wig, having a peripheral edge and covering a head, and a part of the peripheral edge The wig film according to any one of the above (1) to (5), which is pasted or sewn along, may be provided. Further, it is preferable that at least one pair of the wig films be disposed symmetrically on the peripheral portion.

  According to the configuration of the above (7), the same effect as that of the above (6) can be obtained. Also, by arranging at least one pair of wig films symmetrically on the periphery, the positions of the wig cap and the wig can be easily stabilized.

(8) In the wig cap of said (6) or (7), it is preferable that the anti-slip member is provided inside the said peripheral part.

  According to the configuration of the above (8), the shift of the wig cap can be prevented.

  According to the present invention, it is possible to provide a wig film capable of reducing discomfort and discomfort felt by the user, and a wig cap provided with the wig film.

It is a figure which shows the state in which the wig cap provided with the film for wigs which concerns on this embodiment was mounted | worn with the head. (A) is a perspective view of the film for wigs of this embodiment, (b) is a top view of the film for wigs of (a). (A) is a top view of the film for wigs which concerns on a modification, (b) is a top view of the film for wigs which concerns on a modification further. It is a figure which shows the state with which the wig cap provided with the film for wigs which concerns on other embodiment of this invention was mounted | worn with the head. It is a side view which shows the modification of the wig cap shown in FIG. It is a photograph which shows the film 1 for wigs used for Example 1 and Example 2, and the film 2 for wigs. It is a graph which shows the stress-strain relationship of each test piece in the stress relaxation test 1 which concerns on Example 1. FIG. It is a graph which shows the stress-strain relationship of each test piece in the stress relaxation test 2 which concerns on Example 1. FIG. It is a graph which shows the stress-time relationship in stress relaxation of each test piece in the stress relaxation test 2 which concerns on Example 1. FIG. 5 is a graph showing a stress-strain relationship of each test piece in a stress relaxation test 3 according to Example 1. FIG. It is a graph which shows the stress-time relationship in stress relaxation of each test piece in the stress relaxation test 3 which concerns on Example 1. FIG. 6 is a graph showing the amount of stress relaxation of each test piece in the stress relaxation test 3 according to Example 1. It is a graph which shows the stress-strain relationship of each test piece in the tension test 1 which concerns on Example 1. FIG. It is a graph which shows the stress-strain relationship of each test piece in the tension test 2 which concerns on Example 1. FIG. It is a graph which shows the stress-strain relationship of each test piece in the tension test 3 which concerns on Example 1. FIG. It is a figure for demonstrating the relational expression of the surface pressure and force which arise in the film for wigs which concerns on one Embodiment of this invention.

  Hereinafter, a wig film and a wig cap provided with the wig film according to an embodiment of the present invention will be described with reference to the drawings. In the present invention, wig is practically used for concealing thin hair as well as so-called false hair, which generally emphasizes fashion elements such as adding a volume to hair, arranging hair style, etc. It is a concept that also includes a wig.

  As shown in FIG. 1, the wig cap 12 according to the present embodiment is a wig cap disposed inside a wig (not shown), and has a peripheral portion 13 having one end and the other end, and a head And a wig film 100. As shown in FIG. The cap main body 14 is formed in a mesh shape (mesh shape) in order to secure air permeability. The wig film 100 is cross-linked to one end and the other end of the peripheral portion 13, and is brought into contact with the scalp or human hair of the occipital region 11 when the wig cap 12 is put on the head. The combination of the peripheral portion 13 of the cap body 14 and the wig film 100 is in continuous contact around the head.

  The thickness of the wig film 100 is, for example, 20 μm or more and 1000 μm or less. The film for wigs 100 is produced using a bifunctional isocyanate, a bifunctional polyol, and a bifunctional chain extender as main materials.

  In the present embodiment, bifunctional isocyanate having a molecular weight in the range of 174 to 303, for example, is used. Specifically, 2,4-toluene diisocyanate, 4,4'-diphenylmethane diisocyanate, carbodiimide-modified 4,4'-diphenylmethane isocyanate, hexamethylene diisocyanate and the like can be mentioned.

  In addition, a bifunctional polyol having a molecular weight of, for example, in the range of 300 to 2,500 is used. Specifically, polypropylene glycol, 1,4-butane glycol adipate, polytetramethylene glycol, polyethylene glycol, propylene oxide adduct of bisphenol-A, and the like can be mentioned. The bifunctional polyol may be a product obtained by further reacting a bifunctional carboxylic acid or a cyclic ether.

  As a chain extender, for example, a diamine or diol having a molecular weight in the range of 60 to 360 is used. Examples of diols applied to this embodiment include ethylene glycol, 1,4-butane glycol, bis (2-hydroxyethyl) hydroquinone, ethylene oxide adduct of bisphenol-A, propylene oxide adduct of bisphenol-A, etc. It can be mentioned. Moreover, ethylene diamine is mentioned as an example of the diamine applied to this embodiment.

  The above bifunctional isocyanate, bifunctional polyol, and chain extender are blended in a molar ratio of 2.00 to 1.10: 1.00: 1.00 to 0.10, and the film 100 for wig is a prepolymer Based on polyurethane elastomer polymer polymerized according to the method.

  As shown in FIGS. 2A and 2B, the wig film 100 has a plurality of openings 21. Each opening 21 is arranged, for example, in a zigzag form. The shape of the opening 21 is, for example, circular in plan view. The opening 21 penetrates in the thickness direction of the wig film 100.

  In the present embodiment, the aperture ratio, which is the ratio of the total area of the openings 21 to the entire area of one surface of the wig film 100, is 10% or more and 90% or less.

Moreover, in the present embodiment, the number of the openings 21 per unit area is preferably, for example, 30 / cm ² or more and 150 / cm ² or less.

  A release tape may be attached to one side of the wig film 100 before use. This is for the purpose of stabilizing the shape of the wig film 100 for storage.

  As described above, according to the film 100 for wig of the present embodiment, the difunctional diisocyanate, the difunctional polyol, and the difunctional chain extender have a molar ratio of 2.00 to 1.10: 1.00. : For wigs to the scalp by containing polyurethane estram mixed in a ratio of 1.00 to 0.10 and polymerized by the prepolymer method as a main component and the opening ratio of the opening 21 is 10% or more and 90% or less It is possible to reduce the discomfort and discomfort that the user has when the film 100 is in contact. In addition, an effect of being lightweight and being excellent in air permeability is also exerted.

Further, in the present embodiment, when the number of the openings 21 per unit area is not less than 30 pieces / cm ^{2 and not} more than 150 pieces / cm ^2, it is possible to further reduce the discomfort and discomfort which the user has. In addition, the air permeability is more excellent and lighter.

  Moreover, in this embodiment, the molecular weight of the bifunctional diisocyanate is 174 to 303, the molecular weight of the bifunctional polyol is 300 to 2500, and the difunctional chain extender is a diol or diamine having a molecular weight of 60 to 360. . This can further reduce the discomfort and discomfort felt by the user.

  Furthermore, in the present embodiment, when the film for this wig 100 contacts the scalp of the back of the head, which is relatively easy to expand and contract according to the movement of the head, the temperature of the scalp is transmitted, and the contraction of the film for this wig 100 is appropriate. To be done. Thus, the function of alleviating discomfort and discomfort which the user has conventionally works more.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is indicated not by the description of the embodiments described above but by the claims, and further includes all modifications within the meaning and scope equivalent to the claims.

  In the above embodiment, the shape of the opening 21 is circular in plan view, but it is not limited to this. The opening provided in the film for wig is, for example, at least one shape selected from the group consisting of an oval, a cross, and a polygon (a triangle, a quadrangle (including slit long narrow quadrilateral), a pentagon, a hexagon, etc.) May be included. Further, the shape of the opening is not limited to these shapes, and the shape of the opening may be appropriately changed according to the user's feeling of use.

  For example, as shown in FIG. 3A, the wig film 200 may be provided with a plurality of square openings 131 in a plan view.

  Further, instead of providing an opening of the same shape in a single wig film, for example, as shown in FIG. 3B, in the wig film 300, a circular opening 241 and an oval opening in plan view are provided. Openings having different shapes such as 242, square opening 243, cross opening 244, triangular opening 245, vertical slit opening 246, and oblique slit opening 247 are provided. It is also good. Thus, various openings can be provided according to the preference and constitution of the user. The numerical aperture of each shape may be changed as appropriate according to the preference and constitution of the user, the opening shape may be combined variously, and the size and direction of the opening may be changed appropriately. Good.

  In addition, when a film for wig expands and contracts, if there is a corner in the opening, there is a possibility that a crack may be generated from the corner. Therefore, a desirable shape of the opening includes a circular shape and an elliptical shape.

  Further, in the above embodiment, the openings 21 are regularly arranged in a staggered manner, but the present invention is not limited to this. For example, the openings 21 may be distributed randomly (irregularly). May be

  Furthermore, in the above embodiment, the wig film 100 is in contact with the scalp of the back of the head, but this is not a limitation, and the scalp of other parts of the head may also be suitably contacted. .

  Moreover, although the said embodiment demonstrated the form which the film 100 for wigs contacts a scalp or hair directly, the film 100 for wigs is a comparatively soft cloth (The thing which transmits the temperature of scalp to the film 100 for wigs. Mesh) The surface may be coated with a metal or the like. In addition, the film 100 for wig is formed of a relatively soft cloth (a film that transmits the temperature of the scalp to the film 100 for wig, and may be a mesh) or the like, which is thin and cylindrical (having a flat cross section). In the inside of a member, it may be provided extensible.

  Moreover, in the said embodiment, although the film 100 for wigs was bridge | crosslinked at the one end and the other end of the peripheral part 13 of the wig cap 12, it is not limited to this, It is comprised as follows. You may Hereinafter, with reference to FIG. 4, a wig cap provided with a wig film according to another embodiment of the present invention will be described. In addition, since the site | part of the code | symbol with the same last 2 digits as the said embodiment is a case similar to what was demonstrated by the said embodiment except the case where it demonstrates especially, description is abbreviate | omitted.

  As shown in FIG. 4, the wig cap 412 includes a peripheral portion 413, a cap body 414, and a pair of wig films 400. Unlike the above embodiment, the peripheral portion 413 is in continuous contact with the periphery of the user's head. Also, the wig film 400 is provided on the back surface of the peripheral portion 413 so as to be positioned from the left and right sides 410 to the back of the head 411 of the user, and comes in contact with the scalp or human hair. It may be covered with a thin cloth such as cotton. In addition, the film 400 for wigs is the same as the film 100 for wigs of the said embodiment, and opening shape in particular is not limited. Moreover, the attachment method of the film 400 for wigs is not specifically limited, Any, such as adhesion | attachment, a thermocompression bonding, or sewing, may be sufficient.

  As described above, also in the wig cap 412 including two wig films 400, the temperature of the user's scalp is transmitted to the wig film 400 and the wig film 400 is appropriately shrunk, as in the above embodiment. In addition, it is possible to reduce the discomfort and discomfort that the user has.

  In addition, the film 400 for wigs should just be provided in the position to which the temperature of a user's scalp is transmitted, and may be provided in the surface of the peripheral part 413. FIG. Also, the wig film 400 may be integrally provided as a single unit, for example, from the left side head 410 to the back of the head 411 and then the right side head 410 of the user. In this case, a combination of the peripheral portion 413 and the wig film 400 comes into continuous contact around the head of the user.

  Further, the wig cap 412 may be modified into a configuration provided with a non-slip member. Hereinafter, this will be specifically described with reference to FIG. In addition, since the site | part of the code | symbol with the same last 2 digits as the said embodiment is a case similar to what was demonstrated by the said embodiment except the case where it demonstrates especially, description is abbreviate | omitted.

  As shown in FIG. 5, the wig cap 512 includes a peripheral portion 513, a cap body 514, a sheet-like member 515 as a non-slip member, and a wig film 500. The sheet-like members 515 are provided on the back surface of the peripheral portion 413 so as to contact the temples of the left and right side head 510 of the user. The sheet-like member 515 is preferably made of a durable or adhesive silicone or a material containing silicone as a fixing means of the cap body 514. As a material containing silicone, for example, a material that forms “SMP iFit” manufactured by SMP Technologies, Inc. is preferable. Further, the method of attaching the sheet-like member 515 is not particularly limited, and any of adhesion, thermocompression bonding, sewing, and the like may be used. In addition, the film 500 for wigs is the same as the film 400 for wigs of the said embodiment, As shown in FIG. 5, it is a back surface of the peripheral part 513. It is provided to be in contact with the scalp or human hair or covered with a thin cloth such as cotton.

  Also in the wig cap 512 having such a configuration, similarly to the above embodiment, the user can reduce discomfort and discomfort, and further, by providing the sheet-like member 515, the cap main body 514 is used It becomes difficult to shift from the person's head, and the attachment and fit of the wig cap 512 can be improved.

  In this modification, the sheet-like member 515 is provided on the back surface of the peripheral portion 413 so as to contact the temples of the user's both-sides head 510, but the present invention is not limited to this position. , May be provided at any position on the back surface of the peripheral portion 513. As another modification, instead of the above-mentioned wig cap 512, it is possible to apply a non-slip member similar to the sheet-like member 515 in the wig cap 12 shown in FIG.

  EXAMPLES Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to the following examples.

Example 1
The stress relaxation tests 1 to 3 were conducted on the wig film of the present invention. First, the stress relaxation test 1 will be specifically described. The stress relaxation test 1 was performed at room temperature (30 ° C.) using a film 1 for wigs and a film 2 for wigs using AG-500 manufactured by Shimadzu Corporation.

Here, the film 1 for wig has a thickness of 0.22 mm, an aperture ratio of 25%, a basis weight of 135 g / m ² , and a numerical aperture per unit area of 74.4 / cm ² (the lower side of FIG. 6) See the picture). In addition, the film 2 for wig has a thickness of 0.21 mm, an aperture ratio of 25%, a basis weight of 135 g / m ² , and a numerical aperture per unit area of 71.4 / cm ² (the upper photograph in FIG. 6) reference).

  The stress relaxation test 1 is performed on each of the test films of the films 1 and 2 for wig by tension (stress) from both ends in the longitudinal direction of the test specimen at a test speed of 50% / min in plan view, strain 5% or 10% Was applied to each test piece and the strain was held for 5 minutes (300 seconds). During this strain holding, stress relaxation occurs with stress relaxation. Then, after holding the strain at 5% or 10%, unloading was performed again at a test rate of 50% / min. The result of the stress-strain relationship of each test specimen in the unloading process from this tensioning process is shown in FIG. In addition, the mark point distance of each test piece of the films 1 and 2 for wig is 50 mm, and the width | variety (the length of the transversal direction in planar view) is 10 mm. Moreover, FIG. 7 takes stress (N) on the vertical axis and strain (%) on the horizontal axis, and shows the stress-strain relationship of each test piece. In FIG. 7, T = RT stands for Room Temperature, which indicates room temperature, and dε / dt = 50% / min, indicates test speed. The same applies to the following.

  Referring to FIG. 7, it can be seen that the film 1 for wig differs in stress twice or more as compared to the film 2 for wig when the same strain is applied. That is, it can be seen that when pulling the same amount, the wig film 1 requires twice as much force as the wig film 2.

  Next, the stress relaxation test 2 will be specifically described. The stress relaxation test 2 examined the stress-strain relationship at the time of giving distortion 5%, 10%, or 20% about the test piece of the film 1 for said wigs. The test method is the same as the stress relaxation test 1 described above. The results of stress relaxation test 2 are shown in FIG. 8 and FIG.

  FIG. 8 is a graph showing the stress-strain relationship of each test piece in the stress relaxation test 2. In FIG. 8, holding time = 5 min indicates a strain holding time. FIG. 9 is a graph showing a stress-time relationship during stress relaxation of each test piece in the stress relaxation test 2. FIG. 9 shows stress-time relationship of each test piece, with stress (N) on the vertical axis and time (seconds) on the horizontal axis.

  Referring to FIGS. 8 and 9, it can be seen that when a strain of 20% is applied to the film 1 for wig, the maximum stress is applied, and the stress relaxation is gradually given in 5 minutes holding this strain of 20%. You can see that it is happening. On the other hand, when a strain of 5% is applied, almost no stress relaxation occurs, and it can be seen that the amount of reduction in force hardly changes in 5 minutes of holding 5% of strain.

  Next, the stress relaxation test 3 will be specifically described. The stress relaxation test 3 includes the test piece 1 of the film 2 for the wig, the test piece 2 in which the cloth (2) is attached (pasted) to the film 2 for the wig, and the cloth (3) in the film 2 for wig The stress-strain relationship in the case of giving 5% or 10% strain was examined with respect to the test piece 3 attached (pasted).

  Here, the fabric (2) has a thickness of 0.61 mm and is made of polyester fiber. The cloth (3) has a thickness of 0.48 mm and is made of polyamide fiber. In addition, attachment of cloth (2) and (3) was performed by the thermocompression bonding using iron. The test method is the same as the stress relaxation test 1 described above. The results of stress relaxation test 3 are shown in FIG. 10, FIG. 11 and FIG.

  FIG. 10 is a graph showing the stress-strain relationship of each test piece in the stress relaxation test 3. FIG. 11 is a graph showing a stress-time relationship during stress relaxation of each test piece in the stress relaxation test 3. FIG. 12 is a graph showing the amount of stress relaxation of each test piece in the stress relaxation test 3. The amount of stress relaxation (N) on the vertical axis of FIG. 12 is obtained from the results of FIGS. 10 and 11, and the amount of stress relaxation (reduction of force) generated in the stress relaxation test 3 of each test piece. Is shown. Further, in the bar graph showing the stress relaxation amount of each specimen in FIG. 12, the bar graph on the left shows the stress relaxation amount when 5% strain is given, and the bar graph on the right shows the stress relaxation amount when 10% strain is given Is shown.

  Referring to FIGS. 10, 11 and 12, when a strain of 10% is applied, the stress relaxation amount is a test when the test piece 2 is higher than the test pieces 1 and 3 but a strain of 5% is applied. It can be seen that the amount of stress relaxation of pieces 1 to 3 does not change much. Therefore, it can be seen that, even if the cloth (2) or (3) is attached to the wig film 2, the amount of stress relaxation (the amount of decrease in force) can be suppressed if the strain is 5% without attachment. If the strain is 5%, it can be seen that when the wig cap provided with the wig film 2 is attached to the head, the tightening force of the wig cap is hardly reduced for 5 minutes after the attachment.

  Moreover, the tension test 1 was done about the said film 2 for wigs, and cloth (1)-(4) as a comparative example. The tensile test 1 is a test method excluding the strain holding process in the test method of the stress relaxation test 1 above, and at room temperature (30 ° C.), the tensile direction is the vertical direction (the same direction as the hole direction of the film 2 for wig ), The test speed was 50% / min, and the test mark distance of each test piece was 50 mm.

  Here, the cloth (1) has a thickness of 0.35 mm and is made of polyamide fiber. The cloth (4) has a thickness of 0.62 mm and is made of polyester fiber. The fabrics (2) and (3) are the same as the fabrics (2) and (3) used in the stress relaxation test 3 described above. The results of tensile test 1 are shown in FIG. In FIG. 13, the film 2 vertical indicates that the direction of the hole of the film for wig 2 and the tensile direction of the tensile test 1 are the same.

  Subsequently, tensile tests 2 and 3 were performed on the fabrics (2) and (3). Specifically, the tensile test 2 was performed on the test pieces 4 to 6 in which the film 2 for wig was attached to the cloth (2) and the test piece 7 of the cloth (2) alone. Moreover, the tension test 3 was performed about the test piece 8-10 which attached the said film 2 for wigs to cloth (3), and the test piece 11 of cloth (3) single-piece | unit. The results of tensile test 2 are shown in FIG. 14, and the results of tensile test 3 are shown in FIG. In addition, the test method is the same as that of the said tension test 1.

  Referring to FIG. 13, it can be seen that the wig film 2 requires twice or more times or almost twice as much force when pulling the same amount as compared with the fabrics (1) to (4). Further, referring to FIGS. 14 and 15, in the fabrics (2) and (3), when the wig film 2 is attached, when pulling the same amount as compared with the cases of the fabrics (2) and (3) alone. It can be seen that more than twice as much power is required.

(Example 2)
Sensory tests 1 and 2 were conducted on the wig cap provided with the wig film of the present invention. In addition, the wig cap used for the sensory test 1 and 2 has a structure similar to the said wig cap 412 provided with the film for 2 sheets of wigs. Moreover, the film for wigs used for sensory test 1 and 2 is the same as the said film 1 for wigs.

  First, the sensory test 1 will be specifically described. In the sensory test 1, female subjects with different head circumferences have a wig film with a length of 180 mm in the longitudinal direction in plan view and a width of 20 mm in width (length in the lateral direction in plan view) The surface pressure and force generated on the wig film when the caps SS, S, and M were attached to the head were examined using the relational expression (1). In addition, in the sensory test 1, the surface pressure and the force were obtained in a strain area in which the strain of the wig film in each wig cap is around 11%.

The wig cap SS has a peripheral length of 510 mm, the wig cap S has a peripheral length of 530 mm, and the wig cap M has a peripheral length of 550 mm. Further, the relational expression (1) is a relational expression p = (2 × F × π) / (w × L) between the surface pressure and the force generated in the film for wig. Here, p is the contact pressure (N / mm ² ) generated in the wig film, F is the force (N) generated in the wig film, w is the width (mm) of the wig film, and L is the user Perimeter of the head (mm).

  The relationship (1) will be specifically described below with reference to FIG. The lower part of FIG. 16 is a schematic plan view showing a state in which the user wears a wig cap 612 provided with a film for wig 600 on the head, and the upper part of FIG. 16 is a minute view of the film 600 for wig in this state. It is a figure which shows an area | region.

Referring to FIG. 16, dW−2F sin (dφ / 2) = 0 when the balance of the radial force in the minute region of the film for wig 600 is considered. Here, since sin (dφ / 2) = dφ / 2, dW = Fdφ. Therefore, the surface pressure p generated in the film 600 for wig is p = dW / (w × D / 2 × dφ) = Fdφ / (w × D / 2 × dφ) = (2 × F) / (w × D) It becomes. Here, D is the diameter of the head of the user, so D = L / π. Therefore, the relational expression (1) p = (2 × F × π) / (w × L) holds. In the case of p = 0.002 N / mm ² , the relationship of F = 0.001833 × L is established.

The results for sensory test 1 are shown in Table 1 below. In Table 1, ε denotes strain of the film for wig, ε _SS denotes strain at the wig cap SS, ε _S denotes strain at the wig cap S, and ε _M denotes strain at the wig cap M. In addition, assuming that the circumferential length of the head of the user is L, the length of the periphery of the wig cap is L _w , and the length of two wig films is L _b , ε = (L−L _w ) / L _b A relationship is established. Moreover, the results of contact pressure and force generated in the wig films in Table 1 are the results for each wig cap in which the strain area of the wig film falls within the area of 8.33% to 12.50%. Moreover, the force F which arises in the film for wigs was calculated | required using the result of the stress-strain relationship of the film 2 for wigs of the said tension test 1. FIG.

Referring to Table 1, when a user with a head circumference of 545 mm to 555 mm wears the wig cap SS, a surface pressure of 2 kp (p = 0) at which the surface pressure generated on the wig film is a comfortable area. The result was around 002 N / mm ² ). In addition, it can be seen that when the head with a circumferential length of 560 mm to 575 mm wears the wig cap S, the surface pressure is in a comfortable area. In addition, it can be seen that when the wig cap M is worn, a user having a head circumference of 580 mm to 595 mm enters a comfortable area.

  Next, the sensory test 2 will be specifically described. In the sensory test 2, female subjects with different head circumferences have a wig film with a length of 180 mm in the longitudinal direction in plan view and a width of 10 mm in width (length in the lateral direction in plan view) When the caps SS, S, M, and L were attached to the head, the surface pressure and force generated on the wig film were examined using the relational expression (1). In addition, in the sensory test 2, the surface pressure and the force were determined in a strain area in which the strain of the wig film in each wig cap is around 5.5%.

The results for sensory test 2 are shown in Table 2 below. Here, ε _{L in} Table 2 indicates the strain in the wig cap L. Also, p1 and F1 indicate the surface pressure and force when using a wig cap provided at the periphery so that the wig films come in contact from the left and right sides of the user to the back of the head one by one. . In addition, p2 and F2 indicate the surface pressure and force when using a wig cap provided at the periphery so that the wig films come in contact from the left and right sides of the user to the back of the head in pairs. In this case, two wig films are provided on the left and right in a state of being overlapped. Moreover, the results of contact pressure and force generated in the wig films in Table 2 are the results for each wig cap in which the strain area of the wig films falls within the range of 4.17% to 8.33%. Moreover, the force F1 and F2 which arise in the film for wigs were calculated | required using the result of the stress-strain relationship of the film 2 for wigs of the said tension test 1. FIG.

  Referring to Table 2, it can be seen that a user having a head circumferential length of 525 mm to 540 mm enters a comfortable area when wearing the wig cap SS. In addition, it can be seen that when a user with a head circumferential length of 545 mm to 560 mm wears the wig cap S, the surface pressure is in a comfortable area. In addition, it can be seen that when the head with a circumferential length of 565 mm to 580 mm wears the wig cap M, the surface pressure is in a comfortable area. In addition, it can be seen that when a user with a head circumference of 585 mm to 595 mm wears the wig cap L, the surface pressure is in a comfortable area.

Next, with regard to the wig cap S size and the M size provided with the wig film of the sensory test 1 described above, eight female subjects were each attached and evaluation of tightening on the head was performed. The evaluation results are shown in Table 3.

  Referring to Table 3, the evaluations for wig caps S and M received a good evaluation of “just right” or “not tight” by 13 out of a total of 16 people. Therefore, it was confirmed that the S size of the wig cap provided with the wig film of the present invention does not generally sense the tightening strength and does not feel discomfort or discomfort. It was confirmed that the M size of the wig cap provided with the wig film of the present invention does not feel the strength of tightening and does not feel discomfort or discomfort.

11, 411, 511 Back part 12, 412, 512, 612 Wig cap 13, 413, 513 Peripheral part 14, 414, 514 Cap main body 21 Circular opening (opening)
Films for polygons for 100, 200, 300, 400, 500, 600 wigs
241 circular opening (opening)
242 Elliptical opening (opening)
243 Polygonal opening (opening)
244 cruciform opening (opening)
245 polygon opening (opening)
246 Vertical slit-like opening (opening)
247 Diagonal slit opening (opening)
410, 510 Side head 515 sheet-like member

(1) Wig film according to the present invention, and the peripheral portion is used for wig cap having a cap body for covering the head, a wig film, and bifunctional diisocyanate, a bifunctional polyol, 2 And a functional chain extender having a molar ratio of 2.00 to 1.10: 1.00: 1.00 to 0.10, and having polyurethane elastomer polymerized by the prepolymer method as a main component, a plurality of openings, opening ratio der 10% or more 90% or less which is the ratio of the total area of the openings to the total area is, the pair of wig film is disposed on the peripheral portion symmetrically When the wearer uses the wig cap, the strain area per sheet is adjusted to be in the area of 8.33% to 12.50% .
As another aspect, the film for wigs according to the present invention is a film for wigs used in a wig cap provided with a peripheral portion and a cap body for covering the head, and a difunctional diisocyanate and a difunctional polyol And a bifunctional chain extender in a molar ratio of 2.00 to 1.10: 1.00: 1.00 to 0.10, and the main component is a polyurethane elastomer synthesized by the prepolymer method. The aperture ratio, which is a ratio of the total area of the openings to the total area, is 10% to 90%, and one pair of the wig films in two layers is symmetrically formed. The strain area per sheet is adjusted to be in the range of 4.17% to 8.33% in the case where the wearer uses the wig cap, which is disposed at the peripheral portion. It may be the one.

( 6 ) The wig cap according to the present invention is a wig cap disposed inside the wig, having a peripheral edge and covering a head, a cap body, and sticking or sewing along a part of the peripheral edge The film according to any one of the above (1) to (5), which is attached, characterized in that at least one pair of the wig films is disposed at the peripheral portion. .

According to the configuration of the above ( 6 ), since the wig film according to any one of the above (1) to (5) is provided, the user feels discomfort and discomfort when using the wig as compared with the prior art. Can be significantly reduced. In addition, an effect of being lightweight and being excellent in air permeability is also exerted. Furthermore, when the film for the present wig contacts the scalp of the back of the head, which is relatively easy to stretch according to the movement of the head, the temperature of the scalp is transmitted, and the film for the present wig is appropriately contracted. Thus, the function of alleviating discomfort and discomfort which the user has conventionally works more. In addition, in particular, by arranging at least one pair of wig films symmetrically on the peripheral portion, the positions of the wig cap and the wig can be easily stabilized.

( 7 ) In the wig cap of said (6 ) , it is preferable that the non-slip member is provided inside the said peripheral part.

According to the configuration of ( 7 ), the shift of the wig cap can be prevented.

Claims (9)

A film for wigs used in wig caps,
A prepolymer method is prepared by blending a bifunctional diisocyanate, a bifunctional polyol, and a bifunctional chain extender in a molar ratio of 2.00 to 1.10: 1.00: 1.00 to 0.10. Based on polyurethane elastomer polymerized by
A film for a wig characterized by having a plurality of openings and having an opening ratio of 10% to 90%, which is a ratio of the total area of the openings to the total area. The number of the said opening per unit area is 30 pieces / cm < ² > or more and 150 pieces / cm < ² > or less, The film for wigs of Claim 1 characterized by the above-mentioned.   The bifunctional diisocyanate has a molecular weight of 174 to 303, the bifunctional polyol has a molecular weight of 300 to 2,500, and the bifunctional chain extender is a diol or diamine having a molecular weight of 60 to 360. The film for wigs according to claim 1 or 2.   The film according to any one of claims 1 to 3, wherein the opening has at least one shape selected from the group consisting of a circle, an ellipse, a cross, and a polygon. .   The film for wigs according to any one of claims 1 to 3, wherein the opening is not provided with a corner. A wig cap placed inside the wig,
A cap body having a rim with one end and the other end and covering the head;
The wig film according to any one of claims 1 to 5, wherein the wig film is crosslinked to the one end and the other end of the peripheral portion. A wig cap placed inside the wig,
A cap body having a rim and covering the head;
The wig film according to any one of claims 1 to 5, which is attached or sewn along a part of the peripheral edge portion.   8. A wig cap according to claim 7, wherein at least one pair of the wig films is symmetrically disposed on the peripheral edge.   The non-slip member is provided inside the said peripheral part, The wig cap of any one of Claims 6-8 characterized by the above-mentioned.