JP2003033389A - Patch and method for making the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve not only operationality but also stability of a patch by a relatively simple method and at a low cost. SOLUTION: In the patch having adhesive material layer 2 with a thickness of R formed on one surface of a supporting body 1 and a liner 3 with a thickness of T laminated on the adhesive material layer 3, for example, a groove- form halfcut 4 having a generally rectangular-shaped cross section and having groove width of 200 μm or less and groove depth of at least 14T/15 and less than (T+R) is provided in the liner 3. The halfcut 4 can be formed, for example, by irradiating laser beam from above the liner 3 laminated on the adhesive material layer 3. Preferably, the groove width is 50 μm or more, and raised portions 5 are formed at both edge portions of the halfcut 4 on the surface of the liner 3.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a patch and a method for manufacturing the patch. Specifically, the present invention relates to the structure of a liner provided on the pressure-sensitive adhesive layer in the patch, and the method for producing the patch including the liner.

[0002]

2. Description of the Related Art In recent years, various patch materials, that is, various transdermal preparations for administrating drugs through the skin and various types of adhesive bandages have been developed. 6 and 7 are perspective views showing an example of such a patch. The adhesive material has a pressure-sensitive adhesive layer 2 laminated on a support 1 made of cloth or a plastic film, and the pressure-sensitive adhesive layer 2 on the pressure-sensitive adhesive layer 2.
A so-called liner 3 is provided to protect the exposed surface, or to reinforce the supportability of the flexible support 1 and to improve the operability during application.

These patch materials are very excellent from the viewpoint of continuous administration and wound protection. Also,
In order to improve the performance of the patch, the technical development of the pressure sensitive adhesive and the support 1 is actively carried out, and progress is being made year by year.

However, at the final stage of development of the patch, problems such as cost, operability and stability often occur, and it is often difficult to solve them. Especially when a problem occurs in terms of cost, it is fatal and often leads to re-design. Further, if a problem with stability occurs, it may be solved by a packaging material, but in this case, the cost of the packaging material becomes high, which is disadvantageous in development.

Regarding the operability, if the problem can be solved by simply improving the releasability of the liner 3, the liner 3 is provided with a half cut 4 as shown in FIG. 6 and FIG. 6) can be achieved, for example, by changing from a straight line shape as shown in FIG. 6 to a wavy line shape as shown in FIG. These half cuts 4 can be provided by cutting the liner 3 laminated on the pressure-sensitive adhesive layer 2 with a die roll or the like. In the figure, 3a indicates a liner piece divided by the half cut 4.

However, merely changing the line shape of the half cut 4 cannot be an effective measure for improving the overall problem in consideration of stability as a preparation and manufacturing cost. Further, in order to change the line shape, it is necessary to change the cutter shape, etc., which is still disadvantageous in terms of cost.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and its object is the operability, stability, and economical efficiency of the patch and patch preparation. In this case, it is intended to solve these problems by a relatively simple method and provide an economically advantageous patch or patch preparation.

The inventors of the present invention have made diligent efforts to achieve the above object, and have studied various changes in the half-cut shape (cross-sectional shape). As a result, the patch material can be operated at a low cost by a relatively simple method. It was found that not only the stability but also the stability of the patch, especially the seepage of the contents can be improved, and the present invention has been completed.

[0009]

The patch according to claim 1 of the present invention comprises a pressure-sensitive adhesive layer having a thickness R formed on one surface of a support, and a thickness T laminated on the pressure-sensitive adhesive layer. And a liner, which is characterized in that a half cut is formed to prevent the contents from seeping out from the liner side and to improve the handling property.

For this purpose, for example, in the patch according to claim 2, the adhesive layer contains an additive for adjusting the adhesive strength.
Less than 5% by weight, and the half cut has a groove width of 200 μm or less, a groove depth of 14 T / 15 or more,
It is characterized by being less than (T + R).

In this case, the patch according to claim 3 is characterized in that the cross section of the half cut is substantially rectangular or substantially inverted triangular.

The patch according to claim 4 is characterized in that the groove width of the half cut is not less than 50 μm and not more than 200 μm and that the liner surface has a raised portion at the groove edge portion. Furthermore, the patch according to claim 5 is characterized in that the groove width of the half cut is less than 50 μm.

The patch according to claim 6 is the patch according to claim 1.
In the patch according to the above, the pressure-sensitive adhesive layer contains 25% by weight or more and less than 70% by weight of an additive for controlling the adhesive strength,
In addition, the half cut has a substantially rectangular cross-sectional shape with a raised portion at a groove edge portion, has a groove width of 50 μm or more and 200 μm or less, and has a groove depth of 14 T / 15 or more and less than (T + R). It is characterized by being.

Furthermore, the patch according to claim 7 is the patch according to claim 1, wherein the adhesive layer contains 25% by weight or more and less than 70% by weight of the additive for adjusting the adhesive strength. Further, the half cut has a substantially rectangular cross-sectional shape cut by using a die roll having a blade tip angle of less than 45 °, a groove width of less than 20 μm, and a groove depth of 14 T / 15 or more. , (T + R).

The patch according to claim 8 is the patch according to claim 1.
In the patch according to the above, the pressure-sensitive adhesive layer contains an additive in an amount of 25% by weight or more and less than 70% by weight for adjusting the adhesive strength,
In addition, the half-cut has a substantially inverted triangular cross-section, a groove width of 200 μm or less, and a groove depth of 14 μm.
It is characterized by being T / 15 or more and less than (T + R).

The method of manufacturing a patch according to claim 9 of the present invention comprises the steps of forming a pressure-sensitive adhesive layer on one side of a liner, providing a support on the pressure-sensitive adhesive layer, and applying a laser beam to the surface of the liner. And forming a predetermined half cut from the liner side.

In this case, in the manufacturing method according to the tenth aspect of the present invention, the half-cut has a substantially rectangular cross-sectional shape with a raised portion at the groove edge of the liner surface, the groove width is 200 μm or less, and the groove depth. 14T / 15 or more, (T
Is less than + R).

Further, in the manufacturing method according to claim 11, a step of forming a pressure-sensitive adhesive layer on one surface of the liner, a step of providing a support on the pressure-sensitive adhesive layer, and a predetermined process using a leather from the surface of the liner. And a step of forming a half cut.

In this case, the manufacturing method according to the twelfth aspect is characterized in that the half-cut has a substantially inverted triangular sectional shape.

Further, in the method for producing a patch according to claim 13, the step of forming a pressure-sensitive adhesive layer on one surface of the liner, the step of providing a support on the pressure-sensitive adhesive layer, and the liner being temporarily peeled off. Partly cutting in the state, and then re-adhering on the pressure-sensitive adhesive layer to form a predetermined half cut.

In this case, the manufacturing method of claim 14 is characterized in that the liner is cut using a die roll, and the method of manufacturing the patch according to claim 15 is characterized in that the liner is cut using leather. It is characterized by doing. Further, in the manufacturing method according to claim 16, the half cut has a substantially rectangular cross-section and a groove width of 1
The feature is that the thickness is 5 μm or less.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings. FIG. 1 is a cross-sectional view in which a patch according to an embodiment of the present invention is partially broken. The patch of the present invention is formed with a half cut 4 which prevents the contents (adhesive) from seeping out from the liner 3 side and improves the handling property, and has a structure similar to that of a conventional patch. The pressure-sensitive adhesive layer 2 having a thickness R is laminated on the tape- or sheet-shaped support 1, and the liner 3 having a thickness T is laminated on the pressure-sensitive adhesive layer 2. The patch shown in FIG. 1 is also provided with a half cut 4, and two liner pieces 3a are provided.
It is similar to the conventional patch in that it is divided into two, but the cross-sectional shape of the half cut 4 is different.

The half cut 4 of the patch shown in FIG. 1 has a groove shape whose cross-sectional shape is substantially rectangular. In the present invention, the cross-sectional shape is not limited to a rectangular shape in which four corners are right angles such as a rectangle and a square. For example, some sides are curved as shown in FIG. It also includes a trapezoidal distortion, and is intended to include an error range corresponding to the processing method. The groove width w of the half cut 4 is set to 200 μm or less. The depth of the half cut 4 is at least 14 T / 15 of the thickness of the liner 3 and less than the total thickness (T + R) of the thickness R of the adhesive layer 2 and the thickness T of the liner 3. In the patch of FIG. 1, the half-cut 4 reaches the pressure-sensitive adhesive layer 2, and the depth of the half-cut 4 exceeds the thickness T of the liner 3 to reach the pressure-sensitive adhesive layer 2.

The half cut 4 can be easily provided by laser processing. Examples of the laser processing include a cutting method using a CO ₂ laser or a YAG laser. Further, the half cut 4 having this cross-sectional shape may be processed into a linear shape in a plan view as shown in FIG. 6, or may be processed into a meandering curve shape (a wavy line shape) in a plan view as shown in FIG. Is also possible.

The conditions of the laser processing differ depending on the material of the liner 3 to be applied and the thickness thereof, and the half-cut 4 having a desired cross-sectional shape can be easily performed by adjusting the laser output and the scanning speed of the laser beam. You can For example, 75 μm thick polyester liner 3
In the case of using a laser processing machine (power consumption 450 VA), 75% of the maximum output, scanning speed 200 ~
The half cut 4 having the above cross-sectional shape can be applied in the range of 300 mm / sec.

In the patch shown in FIG. 1, the liner 3 is completely divided into two liner pieces 3a and a gap is provided between the two liner pieces 3a. The end faces can be smoothly peeled off without contacting each other, and the handling property is greatly improved. On the other hand, the pressure-sensitive adhesive layer 2 is slightly exposed, and the pressure-sensitive adhesive and the additive may ooze out from the exposed region, but by setting the groove width w to 200 μm or less,
Such a fear can be prevented. That is, the adhesive layer 2 may contain an additive in order to adjust the adhesive force. However, when such an additive is contained in an amount of less than 25% by weight, the groove width w is set to 200 μm or less. It is possible to prevent the contents from seeping out from the liner 3 side.
When the content of the additive is less than 25% by weight, the liner 3 is completely divided as shown in FIG. 1, and the pressure-sensitive adhesive layer 2 is half-divided to the extent that the liner 3 is not completely divided. Even if the cut 4 is provided, the bleeding of the contents can be suppressed. Therefore, the groove width w should be 200 μm or less,
It is preferably set to 50 μm or more. When it exceeds 200 μm, the exposed surface of the pressure-sensitive adhesive layer 2 becomes too much, and for the above reason, the adverse effect on the stability becomes large. In particular, 25% by weight or more and 70% by weight of additives for adjusting the adhesive strength
If the content is less than the above, there is a strong possibility that the content will ooze out from the liner 3 side. On the other hand, if it is less than 50 μm, sufficient peelability and handleability cannot be secured. Further, during processing, the raised portions 5 described below may come into contact with each other, which may adversely affect handleability. Of course, if the weight of the additive is less than 25% by weight, bleeding can be prevented even if the groove width w of the half cut 4 is less than 50 μm.

Further, on the surface of the liner 3 (liner piece 3a) on both sides of the half cut 4, a raised portion 5 having a substantially semicircular cross section is formed at the groove edge of the half cut 4.
When the liner 3 is peeled off, the patch is usually folded in half at the half cut 4, and the liner 3 is peeled off by lifting the end of the liner piece 3a. In this case, by providing the raised portion 5 on the end portion of the liner piece 3a, the thickness of the portion increases, and the handling thereof becomes very easy. In particular, the peeling is even easier for an elderly person who has difficulty in freeing his / her fingertips. Furthermore, since the half-cut portion is less likely to adhere to the inner surface of the packaging material, it is possible to prevent the adhesive material from adhering (adhering) due to seepage of the additive or the like in the pressure-sensitive adhesive layer 2. The size of the raised portion 5 is not particularly limited, and depends on the groove width and the depth of the half cut 4, and its height is approximately 30 to 100 μm. Further, the raised portion 5 can be easily formed by the laser processing.

Next, FIG. 2 is a partially cutaway sectional view of a patch according to a second embodiment of the present invention. The half-cut 4 of this patch has a shape substantially similar to the cross-sectional shape shown in FIG. 1, but its depth is less than the thickness T of the liner 3 and does not reach the pressure-sensitive adhesive layer 2. The difference is that the two liner pieces 3a are connected at the bottom (connecting portion) of the half cut 4. In order to adjust the adhesive strength of the patch, a large amount of additives of 25% by weight or more and less than 70% by weight may be added to the adhesive. In this case, in the patch shown in FIG. Since it is in a partially exposed state, the pressure-sensitive adhesive and the additive may exude from the half cut 4 due to the influence of the additive contained in the pressure-sensitive adhesive layer 2, impairing the operability and adversely affecting the stability. Is strong. However, by providing the depth of the half-cut 4 to such an extent that it does not reach the pressure-sensitive adhesive layer 2 and covering the pressure-sensitive adhesive layer 2 with a very thin liner 3 in the region, the above-mentioned adverse effects are prevented and handleability is improved. Can be improved.

At this time, the thickness of the liner 3 at the connecting portion varies depending on the material of the liner 3 and the like, but it is preferable that it is as thin as possible, and it is preferable to set it so that it can be easily split into two liner pieces 3a. Specifically, it is desirably set to be less than 1/15 of the thickness of the liner 3, that is, the depth of the half cut 4 is 14/15 or more of the thickness T of the liner 3. At this time, the depth is 14/1
When it is less than 5, there is a strong possibility that the liner 3 cannot be cut into two in the half cut 4 when the liner 3 is peeled off.

Thus, by making the cross-sectional shape of the half cut 4 into the above-mentioned shape, even when the composition of the pressure-sensitive adhesive layer 2, for example, a large amount of additive such as 40% by weight is mixed, the pressure-sensitive adhesive and the additive are It is possible to ensure operability and stability while preventing bleeding. That is, according to the present invention, the handleability can be improved at a low cost while considering the stability by an extremely simple design change in which the cross-sectional shape of the half cut 4 is changed.

FIG. 3 is a partially cutaway sectional view of a patch according to the third embodiment of the present invention. The cross-sectional shape of the half cut 4 of the patch is a simple rectangular shape. The half cut 4 reaches the pressure-sensitive adhesive layer 2, and the liner 3 is cut into two liner pieces 3a. In this way, the half cut 4 may be formed into a simple substantially rectangular shape,
Liner 3 by half cut 4 with adjusted groove width w
Even if it is cut into two liner pieces 3a, it is possible to prevent the exudation from the side of the liner 3 and improve the handleability thereof.

The groove width w of the half cut 4 is also 200 μm or less from the viewpoint of suppressing the seepage of the contents, and since the groove edge portion of the half cut 4 does not have the raised portion 5, it is 5
It may be less than 0 μm. Further, it is preferably set to 15 μm or less. Also by this method, even when the additive for adjusting the adhesive strength is contained in an amount of 25% by weight or more and less than 70% by weight, the exudation from the liner 3 side can be suppressed. For example, when the additive in the pressure-sensitive adhesive layer 2 is 30% by weight or less, it is possible to prevent the content from oozing out with such a groove width, and to reliably ensure the stability. Further, since the liner 3 is cut in two, it is excellent in operability. The half cut 4 does not necessarily have to reach the pressure-sensitive adhesive layer 2,
The depth of the half cut 4 is 14/1 of the thickness T of the liner 3.
When it is 5 or more, the operability is not reduced.

The half cut 4 can be formed by laser processing, but can be easily provided by a die roll. That is, the liner 3 laminated on the pressure-sensitive adhesive layer 2 is temporarily peeled off from the layered body that has been once wound into a roll, the liner 3 is cut by a die roll, and immediately thereafter, the liner 3 is re-bonded on the pressure-sensitive adhesive layer 2. As a result, the patch shown in FIG. 3 can be obtained. That is, with the liner 3 partially peeled from the pressure-sensitive adhesive layer 2, the peeled part is cut. In this case, it is preferable to use a die roll having a blade tip angle of less than 45 ° and a groove width w of less than 20 μm. Further, use a die roll edge angle of 30 ° or less for the groove width w.
Is preferably 15 μm or less. When the tip angle of the blade of the die roll is 45 ° or more, the amount of bleeding from the liner 3 side increases, resulting in poor handling and stability.

Thus, using the die roll, the groove width w
Is less than 20 μm, preferably 15 μm or less, and by providing the half cut 4 having a substantially rectangular cross-sectional shape, an adhesive material that is excellent in handleability, has less bleeding from the liner 3 side, and has good stability is inexpensive and reliable. Obtainable. Accordingly, not only when the content of the additive is less than 25% by weight, but also when the pressure-sensitive adhesive layer 2 exceeds 25% by weight and about 30% by weight (additional additive may be added in some cases). If so, the half-cut 4 having such a simple cross-sectional shape can sufficiently suppress the seeping.

FIG. 4 is a sectional view of the patch according to the fourth embodiment. In the patch, the cross section of the half cut 4 is formed in a substantially inverted triangular cross section (V shape), the half cut 4 reaches the pressure-sensitive adhesive layer 2, and the depth thereof is the thickness T of the liner 3. And the pressure-sensitive adhesive layer 2 is formed. By processing into such a cross-sectional shape, the groove width of the half cut 4 is widened in the surface portion of the liner 3, and the liner piece 3a is easier to peel off than in the conventional example. Further, since the tip portion of the half-cut 4 has an acute angle, when the substantially rectangular half-cut 4 reaching the pressure-sensitive adhesive layer 2 is provided, it exudes as compared with the half-cut 4 shown in FIG. 3, for example. Substantially less adhesive.

The cross-sectional shape of the half-cut 4 also includes the pressure-sensitive adhesive layer 2 containing 25% by weight or less of the additive.
It can be applied to the pressure-sensitive adhesive layer 2 containing the above additive of less than 70% by weight, and even if the half cut 4 having such a shape is provided, handling of the patch without impairing the stability And the reliability of the product can be improved at low cost.

The groove-like half cut 4 having a substantially inverted triangular cross section can be easily formed by using a razor (blade). The groove width of the half cut 4 is relatively determined by the thickness of the liner 3 and the thickness of the pressure-sensitive adhesive layer 2, but generally the liner 3
50 μm or more and 200 μ at the boundary between the adhesive layer 2 and
It is set to less than m. The half cut 4 is formed by cutting the surface of the liner 3 with a laser while the liner 3 is laminated on the adhesive layer 2. Also, as in the case of using a die roll, while temporarily peeling off the liner 3 laminated on the pressure-sensitive adhesive layer 2 from the laminate, the liner 3 is cut using a leather, and immediately after that, re-adhesion is performed on the pressure-sensitive adhesive layer 2. The half cut 4 can also be formed by performing the above.

FIG. 5 is a sectional view of a patch according to the fifth embodiment. In this patch, the half cut 4 has a depth (less than the thickness T of the liner 3) that the pressure-sensitive adhesive layer 2 is not exposed and does not completely cut the liner 3. In this case, it is preferable that the thickness in the region (connecting portion) where the half cut 3 is provided is smaller, and at least less than 1/15 of the thickness T of the liner 3, that is, the depth of the half cut 4 is 14 T / of the thickness T of the liner 3. It is preferably set to 15 or more. By setting such a liner thickness, the liner 3 can be easily torn into two liner pieces. Further, since the tip of the liner 3 has an acute angle, it has an advantage that it can be torn more easily than the liner 3 shown in FIG. In this case, since the half-cut 4 does not reach the pressure-sensitive adhesive layer 2, the groove width is not particularly limited, but in consideration of the handleability of the liner 3, it is 200 μm or less on the surface of the liner 3. This is the same even when the half-cut 4 reaches the pressure-sensitive adhesive layer 2, and if the groove width on the surface of the liner 3 exceeds 200 μm, the handleability, for example, the tactile sensation is rather decreased, or the liner 3 is used before use. Is more likely to peel off.

The material used for the support 1 and the adhesive or the liner 3 used in the patch of the present invention is not particularly limited, and various conventionally known materials may be used. In the present invention, what kind of half cut 4 is selected is an important viewpoint, and a desirable one is selected depending on the characteristics as a patch, particularly the composition of the pressure-sensitive adhesive layer 2 and the material of the liner 3. Further, the manufacturing process thereof is not limited to the process of forming the pressure-sensitive adhesive layer 2 on the liner 3 and then providing the support 1 to obtain the patch,
A known manufacturing method such as directly forming the pressure-sensitive adhesive layer 2 on the support 1 may be used.

For the support 1, for example, various plastic films, non-woven fabrics, papers, woven fabrics, knitted fabrics and the like are used. Further, even in the case of a plastic film, polyvinyl chloride alone or a copolymer of ethylene, propylene, vinyl acetate, acrylic acid, acrylic acid ester, methacrylic acid, methacrylic acid ester, acrylonitrile, styrene, vinylidene chloride, etc. and other monomers. Examples of the various films include olefin polymers such as polyethylene, polypropylene and ethylene-vinyl acetate copolymer, polyester polymers such as polyethylene terephthalate and polyether polyester, and polyamide polymers such as polyether polyamide block polymers. These supports are appropriately selected according to the purpose of use.

The pressure-sensitive adhesive is not particularly limited, and acrylic pressure-sensitive adhesive, rubber pressure-sensitive adhesive, silicone pressure-sensitive adhesive, urethane pressure-sensitive adhesive and the like can be used. Further, in these adhesives, physical crosslinking by irradiation with radiation such as ultraviolet irradiation or electron beam irradiation, isocyanate-based compounds such as trifunctional isocyanate and organic peroxides, organic metal salts, metal alcoholates, metal chelate compounds, Chemical crosslinking treatment using various crosslinking agents such as polyfunctional compounds (polyfunctional external crosslinking agents and polyfunctional internal crosslinking monomers such as diacrylate and dimethacrylate) may be carried out as necessary.

Further, it is sufficient that the liner 3 be provided with a groove-shaped half cut having the above-mentioned predetermined cross-sectional shape. The material of the liner 3 is not particularly limited as long as it is a plastic liner. In consideration of easiness of application and processing accuracy, a material having a uniform thickness is desirable, while an excessively thick material or a hard material is not preferable. Examples of the liner include polyethylene film (PE), polypropylene film (PP), polyester film (PET) and the like. Further, a composite film obtained by sticking paper to these, or a film made of paper alone can also be preferably used.

As described above, in the present invention, by appropriately changing the cross-sectional shape of the half-cut 4, it is possible to secure the stability and handleability according to the characteristics of the pressure-sensitive adhesive or the support without increasing the cost.

[0044]

EXAMPLES Next, various patch materials, which are examples of the present invention, were produced, and the effects of the present invention were evaluated from the viewpoints of their handleability and stability.

(Production of adhesive) In a polymerization apparatus having an internal volume of 1000 L, 228 kg of 2-ethylhexyl acrylate (Toagosei Co., Ltd.) and 12 kg of acrylic acid (Toagosei Co., Ltd.)
And 60 kg of ethyl acetate (manufactured by Showa Denko KK) were charged, and 4
Nitrogen substitution was performed while maintaining the temperature at 0 ° C. and rotating the rotary blade at 30 rpm. In addition, 385 kg of ethyl acetate was prepared for dropping in the dropping device. Next, as an initiator, 640 g of "Nyper BW" (trade name, manufactured by Mitsui Toatsu Co., Ltd.) dissolved in 4 kg of ethyl acetate was added, and the inner bath temperature was 60 ± 2 ° C.
Polymerization was carried out for 12 hours. The temperature was controlled by adjusting the outer bath temperature and dropping ethyl acetate. After the reaction,
After the outer bath temperature was raised to 80 ° C. and heating was continued for another 25 hours, all the remaining amount of the ethyl acetate for dropping was dropped and cooled to obtain a polymerization solution of the pressure-sensitive adhesive.

(Manufacture of Original Fabric for Adhesive Material) Manufacture of Original Fabric A After adjusting the viscosity by adding ethyl acetate to the polymerization solution of the above-mentioned pressure-sensitive adhesive, a coating machine equipped with a comma coater and a 2-zone drying tower was used. The width of the adhesive layer is 58 cm and the thickness after drying is 60 μm on the release treated surface of a polyester liner (made by Mitsubishi Kagaku Polyester Co., Ltd.) having a thickness of 75 μm and a width of 60 cm.
It was applied so that Then, after drying, a polyester film (manufactured by Mitsubishi Kagaku Polyester Co., Ltd.) having a width of 60 cm and a thickness of 12 μm was laminated to obtain a raw fabric roll (laminate) having a total coating amount of 500 m. The original fabric roll was cut using a slitter to prepare a test original fabric A having a width of 7 cm. Manufacture of Raw Material B Coronate HL as a cross-linking agent such that 25 parts by weight of isopropyl myristate and 0.2 wt% of the solid content of the adhesive are added to 75 parts by weight of the solid content of the adhesive polymerization solution. (Trade name, manufactured by Nippon Polyurethane Industry Co., Ltd.) was further added, and ethyl acetate was further added to mix 100 kg so as to have a solute content of 25 wt%. This was stirred with a high speed disper for 20 minutes to obtain a coating liquid. A coating roll was obtained using this coating solution in the same manner as the raw fabric A, then heat-treated at 70 ° C. for 48 hours, and then cut using a slitter to prepare a test raw fabric B having a width of 7 cm. did. Production of raw fabric C A test raw fabric C was prepared in the same manner as in the production of the raw fabric B, except that the mixing ratio (weight ratio) of the adhesive solid content and isopropyl myristate was changed to 50:50.

(Half-cut processing) Laser cutting laser marker ML9100 (manufactured by Keyence Corporation, CO
₂ laser, power consumption 450VA) built-in cutting device (manufactured by Kentoku Sangyo Co., Ltd.), laser output 75%, scanning speed 7
After providing a half-cut in the range of 0 to 400 mm / sec, the patch was cut into a square of 5 cm × 5 cm from the original fabric to prepare a patch. This patch was hermetically sealed with a packaging material (made by Toyo Aluminum Co., Ltd.) whose inner surface was made of Hytron resin. A die cutting device (manufactured by Nitto Seiki Co., Ltd., die roll manufactured by Koto Engraving Co., Ltd.) in which the tip angles of the die roll processing blades were 20 °, 30 °, and 45 ° was used. The liner was once peeled from the pressure-sensitive adhesive layer while transporting each raw material, cut the liner in the transport direction by a die roll, and immediately re-bonded to the peeled pressure-sensitive adhesive layer and wound up. Then, a 5 cm × 5 cm square was cut from the original fabric to prepare a patch. This patch was hermetically sealed with a packaging material (made by Toyo Aluminum Co., Ltd.) whose inner surface was made of Hytron resin. Using a leather (blade) processing slitter S300 (manufactured by Sanwa Giken Co., Ltd.), a ceramic leather was made to enter from the liner side while being conveyed at a conveying speed of 30 m / min to provide a half cut.
Then, it was cut into a 5 cm × 5 cm square to prepare a patch. This patch was hermetically sealed with a packaging material (made by Toyo Aluminum Co., Ltd.) whose inner surface was made of Hytron resin.

(Evaluation method) The packaged sample was
After storing for 3 months, a male panelist aged 55 or older evaluated the handling property of the patch (easiness of peeling of the liner) on a scale of 5 with 5 being good and 1 being bad. Also, the bleeding of the adhesive from the half cut into the packaging material is visually observed.If there is no bleeding out, it is `` ○ '', if there is little bleeding out, it is `` △ '', and bleeding is recognized. The case where the bleeding was severe was represented by “×”, and the case where the exudation was severe was represented by “xx”. On the other hand, the cross-sectional shape of the half cut was observed using a microscope (manufactured by KEYENCE CORPORATION). In addition,
"-" In the result table indicates that determination is not necessary or determination is impossible.

(Study Results) Evaluation results are shown in Tables 1 to 3. As can be seen from each table, according to the half cut according to the present invention, the characteristics of the pressure-sensitive adhesive layer (for example, the content of the additive)
Depending on the situation, the handleability can be improved by appropriately changing the cross-sectional shape of the wide half cut.
For example, by forming a half cut having a predetermined width and a predetermined depth by laser processing and forming raised portions on both sides thereof, not only the handling property is further improved, but also the stability is improved (No. 2, 3, 4, 5, 8,
9, 14, 15). In this case, the additive is 25% by weight
Not only in the case of the raw fabric A (additive amount: none), the content of the raw fabric B (additive amount: 25.1 wt%) in the adhesive layer is 25% by weight, In each of the raw fabric C (with an additive amount of 50.0% by weight) of less than 70% by weight, the contents did not seep out and good handleability was obtained. In addition, in Nos. 1, 7, and 13, the liner of 1T / 15 or more remained in the half-cut portion, and the function as the half-cut was not fulfilled.

Good stability and handleability were also obtained by providing a half cut having a groove width of 15 μm or less having a simple rectangular cross section (No.
21, 24, 25, 27, 28). Also in this case, the bleeding of the contents could be suppressed in any of the original fabrics.

Further, depending on the type of adhesive (raw fabric A, B), even if leather (blade) processing is performed and a half cut having a groove with a substantially inverted triangular cross section is provided, stability and handleability are improved. It was possible to improve (No. 31, 32).

[0052]

[Table 1]

[0053]

[Table 2]

[0054]

[Table 3]

[0055]

The patch of the present invention is a patch provided with a pressure-sensitive adhesive layer having a thickness R formed on one surface of a support, and a liner having a thickness T laminated on the pressure-sensitive adhesive layer. Therefore, since a half-cut is formed to prevent the contents from seeping out from the liner side and to improve the handleability, the design of the adhesive material may cause a difference in the content of additives in the pressure-sensitive adhesive layer, for example. Problems that occur with respect to operability, stability, etc. are solved by a very simple and inexpensive method, and an economically advantageous patch can be obtained.

The half cut has a substantially rectangular cross section or a substantially inverted triangular cross section with a predetermined width and a predetermined depth. These half cuts are formed by, for example, irradiation with a laser beam or processing with a die roll or a laser (blade). It can be easily installed. Therefore, the peelability and handleability of the liner and the stability of the patch can be improved without increasing the cost.

For example, when the adhesive layer contains less than 25% by weight of an additive for adjusting the adhesive strength, the half-cut groove width is 200 μm or less, the groove depth is 14 T / 15 or more, and (T + R ) Less than.

For example, when the additive is contained in an amount of 25% by weight or more and less than 70% by weight, the half-cut has a substantially rectangular cross section with a raised portion at the groove edge, and the groove width is 50 μm or more. 200μm or less, groove depth 1
It may be 4T / 15 or more and less than (T + R).

When the additive is contained in an amount of 25% by weight or more and less than 70% by weight, the half-cut is formed into a substantially rectangular shape whose cross section is cut by using a die roll having a blade tip angle of less than 45 °. The groove width may be less than 20 μm, and the groove depth may be 14 T / 15 or more and less than (T + R).

Further, when the additive is contained in an amount of 25% by weight or more and less than 70% by weight, the half-cut has a substantially inverted triangular cross section, a groove width of 200 μm or less, and a groove depth of 14 T. It may be set to / 15 or more and less than (T + R).

As described above, according to the present invention, by appropriately changing the cross-sectional shape of the half-cut according to the characteristics of the pressure-sensitive adhesive (layer), it is easy to improve the handleability without lowering the stability. In addition, the problem of stability and handleability can be easily dealt with by an inexpensive method.

[Brief description of drawings]

FIG. 1 is a partially cutaway cross-sectional view of a patch according to an embodiment of the present invention.

FIG. 2 is a partially cutaway sectional view of a patch according to another embodiment of the present invention.

FIG. 3 is a partially cutaway sectional view of a patch according to still another embodiment of the present invention.

FIG. 4 is a partially cutaway sectional view of a patch according to still another embodiment of the present invention.

FIG. 5 is a partially cutaway sectional view of a patch according to still another embodiment of the present invention.

FIG. 6 is a perspective view of a patch according to a conventional example.

FIG. 7 is a perspective view of a patch of another conventional example.

[Explanation of symbols]

1 support 2 Adhesive layer 3 liner 3a Liner piece 4 half cut 5 Rising part

Claims (16)

[Claims] 1. An adhesive material comprising a pressure-sensitive adhesive layer having a thickness R formed on one surface of a support and a liner having a thickness T laminated on the pressure-sensitive adhesive layer, the adhesive material comprising: A patch having a half-cut formed to prevent the contents from seeping out and to improve the handleability. 2. The adhesive layer contains less than 25% by weight of an additive for adjusting adhesive strength, and the half cut has a groove width of 200 μm or less and a groove depth of 14 T / 15 or more, The patch according to claim 1, wherein the patch is less than (T + R). 3. The patch according to claim 2, wherein the half-cut has a substantially rectangular cross section or a substantially inverted triangular cross section. 4. The patch according to claim 2, wherein the groove width of the half cut is 50 μm or more and 200 μm or less, and the groove edge portion on the surface of the liner has a raised portion. 5. The patch according to claim 2, wherein the half-cut groove width is less than 50 μm. 6. The adhesive layer contains 25% by weight or more and less than 70% by weight of an additive for adjusting the adhesive strength, and the half cut has a cross-sectional shape having a raised portion at a groove edge portion. Rectangular shape with a groove width of 50 μm or more, 200
μm or less, groove depth of 14T / 15 or more, (T +
It is less than R), The patch according to claim 1, which is less than R). 7. The adhesive layer contains 25% by weight or more and less than 70% by weight of an additive for adjusting the adhesive strength, and the half cut has a cross-sectional shape with a blade tip angle of less than 45 °. A substantially rectangular shape cut using a die roll,
The patch according to claim 1, wherein the groove width is less than 20 μm, and the groove depth is 14 T / 15 or more and less than (T + R). 8. The adhesive layer contains 25% by weight or more and less than 70% by weight of an additive for adjusting the adhesive strength, and the half-cut has a substantially inverted triangular cross-section.
Groove width is 200μm or less, and groove depth is 14T / 15
The above is less than (T + R).
The patch material described. 9. A step of forming a pressure-sensitive adhesive layer on one side of a liner, a step of providing a support on the pressure-sensitive adhesive layer, and irradiating the surface of the liner with a laser beam to obtain a predetermined half cut from the liner side. And a step of forming a step of forming a patch. 10. The half-cut has a substantially rectangular cross-section with a raised portion at the groove edge of the liner surface, the groove width is 200 μm or less, the groove depth is 14 T / 15 or more, and less than (T + R). The method for producing a patch according to claim 9, wherein 11. A step of forming a pressure-sensitive adhesive layer on one side of a liner, a step of providing a support on the pressure-sensitive adhesive layer, and a step of forming a predetermined half cut from the surface of the liner using a leather. A method for manufacturing a patch, comprising: 12. The method for producing a patch according to claim 11, wherein the half-cut has a substantially triangular cross-sectional shape. 13. A step of forming a pressure-sensitive adhesive layer on one side of a liner, a step of providing a support on the pressure-sensitive adhesive layer, and a part of the liner being temporarily peeled off, and then,
And a step of forming a predetermined half cut by re-adhesion on the pressure-sensitive adhesive layer. 14. The method for producing a patch according to claim 13, wherein the liner is cut using a die roll. 15. The method for producing a patch according to claim 13, wherein the liner is cut using a leather. 16. The method for producing a patch according to claim 13, wherein the half-cut has a substantially rectangular cross section and a groove width of 15 μm or less.