JP2020145996A - Nipple patch for livestock - Google Patents

Abstract

To provide a safer nipple patch for livestock, concerning a protection material used for preventing, from mastitis, nipples of livestock, mainly of a dairy cow.SOLUTION: In a nipple patch for livestock, which is a patch pasted on a nipple of livestock, for protecting a nipple mouth of livestock, the patch comprises a laminate 2 formed by laminating an adhesive layer 4 on one surface of an elastic film 3, and the adhesive layer 4 contains poly (meth) acrylate.SELECTED DRAWING: Figure 1

Description

The present invention relates to a novel livestock teat patch. More specifically, the present invention relates to a novel teat patch that adheres to the teat for a long period of time and is difficult to peel off, and as a result can protect the teat mouth for a long period of time.

Mastitis is one of the serious diseases of dairy cows. Mastitis is an infectious disease caused by bacteria and other microorganisms invading the breast through the nipple opening and colonizing and multiplying, but the cause of the disease is complicated and it has not been eradicated yet. Not only does mastitis reduce milk yield and quality, but when treated with antibiotics, milk cannot be shipped during the treatment period due to drug residue. Furthermore, if the symptoms are severe and difficult to treat, the affected cows must be eliminated, which is a disease that causes enormous financial loss for dairy farmers.

Currently, for the purpose of preventing mastitis, a method of immersing the nipple in a dipping agent (aqueous solution of a bactericidal disinfectant) before and after milking is generally used during the lactation period when milking is performed. The purpose of this is to sterilize the mastitis-causing bacteria adhering to the nipple skin surface. In addition, a method of adding a component that improves the condition of the skin, such as a moisturizing agent component, to the dipping agent to reduce the adhered area of mastitis-causing bacteria is also used. Various dipping agents for the main purpose of such sterilization have been proposed (for example, Patent Document 1 and Patent Document 2), and a large number of products are commercially available on the market.

On the other hand, during the dry period when milking is not performed, a method of injecting an antibiotic into the breast through the nipple opening at the start of dry milk to kill the mastitis-causing bacteria in the breast is generally used. In the early stage of dry milk, antibiotics have a certain bactericidal effect and are considered to be effective in preventing mastitis, but the problem of antibiotics leaking from the nipple opening, antibiotics at the start of milking after the end of the dry milk period There is also a problem of contamination with raw milk, and the emergence of antibiotic-resistant bacteria after long-term use. In addition, it has been reported that the new prevalence of mastitis increases in the early stage of dry milk and the late stage of dry milk before delivery (for example, Non-Patent Document 1 and Non-Patent Document 2), and it is sufficient to take measures against mastitis with antibiotics. Is hard to say.

Therefore, as a means of protecting the dairy cow's teat from mastitis-causing bacteria, a technique has been proposed in which the entire dairy cow's teat is protected to prevent bacteria and other microorganisms from invading the udder from the teat mouth. For example, Patent Document 3 states, "In the dry period of dairy cows, during the first 2 to 9 days of the dry period, which is susceptible to mastitis, and about 2 to 9 days before delivery. The milk of a dairy cow, which is characterized by physically preventing the infection of mastitis-causing bacteria by immersing the teat in a teat sealant and keeping the teat in a state in which a thin film that closes the teat mouth is formed. How to prevent flames. " Specifically, Patent Document 3 describes urethane as a papillary sealant for immersing the papillary opening, using a freon substitute such as tetrahydrofuran, acetonitrile, trichloroethane, trichloroethylene or methylene chloride, or an aromatic compound such as toluene or xylene as a solvent. A rubber-based material selected from rubber, latex rubber, butadiene resin, polyvinyl alcohol, liquid butyl rubber, liquid rubber, natural rubber, butyl rubber, nitrile rubber, chloroprene rubber, vinyl acetate rubber, etc., dissolved at a concentration of 5 to 15%. It is described. However, the rubber-based material described in Patent Document 3 may have insufficient adhesion to the nipple, is easily peeled off from the nipple, and needs to prevent infection with mastitis-causing bacteria for about 2 days to about 9 above. During the period of the day, the obstruction of the nipple opening may not be sustained and there was room for improvement.

Further, Patent Document 4 discloses "a papillary protective material for livestock, which is made of a flexible film which is waterproof and has a large elongation rate at the time of cutting, and can be wrapped and fixed". .. However, the method described in Patent Document 4 is characterized in that a film is wound around the outer periphery of the nipple and fixed, but since the vicinity of the nipple opening at the tip of the nipple is thin, the film is brought into close contact with the nipple opening in this method. It can be difficult to get it done. As a result, there is a possibility that a gap may be formed between the nipple opening and the film, which should be protected, and the causative bacteria such as bacteria may invade from there.

Further, Patent Document 5 discloses "a teat marking film for livestock for preventing milking from livestock infected with mastitis and / or papillitis". However, the marking film is intended to be used for identifying milking animals with mastitis, not for teat protection. In addition, since the non-woven fabric, woven cloth, and net cloth described as the support have poor waterproof property, if the nipple becomes dirty with manure or the like, bacteria may invade through the support.

Further, Patent Document 6 discloses "a papilla pack containing at least water, a calcium salt and alginate, and having a viscosity before gelation of 5000 to 1.5 million mPa · sec". Further, Patent Document 6 shows that the nipple can be protected from mastitis-causing bacteria for a long period of time by blending an antibacterial agent such as iodine in the nipple pack. In the nipple pack described in Patent Document 6, it is explained that a paste obtained by kneading a powder component composed of alginate or calcium sulfate with a solvent such as water is applied to the nipple immediately before use. There is. Calcium sulfate is insoluble in water, that is, a hydrophobic component, and it may be very difficult to disperse it uniformly in a hydrophilic solvent such as water. Therefore, in order to obtain the desired dispersibility, a great deal of labor and skill may be required of the operator, and further, the powder component may be scattered around during kneading, which is improved. There was room for. Further, Patent Document 6 states that the above problem can be alleviated by pre-dispersing a component composed of powdered alginate or calcium sulfate in a hydrophilic solvent such as glycerin or propylene glycol. Even in some cases, it was sometimes difficult to disperse calcium sulfate, which has a hydrophobic surface, in a hydrophilic solvent. Therefore, there is a case where sedimentation separation occurs over time. As a result, in some cases, when used (when kneading with water), the dispersibility is rather impaired, and the kneading takes a long time or air bubbles are mixed, so that the resulting teat pack is uniform. The property and curability were lowered, the adhesion to the nipple was deteriorated, and it was easy to peel off from the nipple.

As described above, in order to prevent mastitis, it is of course necessary to improve the breeding environment, but it is effective to prevent the causative bacteria from physically invading from the nipple opening, and it takes about half a day during the milking period. In the dry milk period, there is a demand for a nipple protective material that adheres to the nipple for about one week and does not peel off and can block the nipple opening in the early stage of dry milk and the late stage of dry milk before delivery.

Patent No. 3404704 Japanese Unexamined Patent Publication No. 11-155404 Japanese Unexamined Patent Publication No. 2000-41529 Japanese Unexamined Patent Publication No. 2006-129795 Japanese Unexamined Patent Publication No. 2010-213691 Japanese Unexamined Patent Publication No. 2006-50911

Kodansha Scientific Co., Ltd., New Livestock Handbook, September 10, 2006, Kodansha Co., Ltd. Roger Blowery, Peter Edmondson, Translated by Katsumi Hamana, Augmented Revised Edition of Mastitis Control in Cows, February 20, 2012, Midori Shobo Co., Ltd.

As described above, various materials for preventing the teats of domestic animals, mainly dairy cows, from mastitis have been studied.

However, although these known methods can protect the nipple, there is a complicated step of forming a film on the nipple, and even when it is not necessary to form a film, the workability is such that the entire nipple is covered. There was room for improvement in terms of adhesion and adhesion.

Therefore, for the purpose of improving workability and adhesion, the present inventors have developed a technique in which a part including the nipple opening is attached using a film larger than the nipple opening, which has an adhesive layer, instead of covering the entire nipple. I tried to apply it. However, although the workability and adhesion are certainly improved by applying this technology, it is difficult to follow the shape of the nipple by simply using a large film, wrinkles are likely to occur, and the attached film is easily peeled off. It turned out that there is a problem of becoming (poor adhesiveness). Therefore, it has been an issue to develop a material having good workability and adhesiveness and also excellent adhesiveness.

Against the above background, the present inventors have already proposed livestock teat patches that solve the above problems, such as Japanese Patent No. 6189574 and Japanese Patent Application No. 2017-149874.

On the other hand, in recent years, the safety of chemical substances has been scrutinized more strictly, and the above-mentioned domestic teat patch is also required to be a material with higher safety.

Therefore, the present invention provides a livestock teat patch using a safer material that does not impair the effect in the protective material used to prevent the teat of a domestic animal, mainly a dairy cow, from mastitis. The purpose.

The present inventors have diligently studied in order to solve the above-mentioned problems when the papillary patch for livestock is composed of a laminated body in which an adhesive layer is laminated on one side of an elastic film. Then, they have found that by using a specific component as the pressure-sensitive adhesive, a teat patch for livestock with higher safety can be obtained, and have completed the present invention.

That is, the present invention is a patch for affixing to a teat of a domestic animal to protect the teat mouth of the domestic animal, wherein the patch comprises a laminated body in which an adhesive layer is laminated on one side of an elastic film. A papillary patch for livestock, characterized in that the adhesive layer contains a poly (meth) acrylate.

The nipple patch for livestock of the present invention is an extremely promising nipple patch for livestock because it does not impair the adhesive performance while using a safer substance by using an adhesive having a specific component.

It is sectional drawing which shows an example of the papillary patch of this invention. It is a top view which shows an example of the papillary patch of this invention. It is a schematic diagram which shows the dairy cow which is an example of livestock. It is a schematic diagram which shows the teat of a dairy cow.

In the drawings of the present invention, in order to make the characteristic parts easy to understand, the components may be shown in a ratio different from the actual one.

The present invention is a patch for protecting the teat mouth of livestock. This patch is mainly composed of an elastic film and covers the nipple portion including the nipple opening. The livestock teat patch of the present invention (hereinafter, may be simply referred to as a "nipple patch") is composed of a laminate in which an adhesive layer is laminated on one side of an elastic film.

The layer structure is not particularly limited as long as the pressure-sensitive adhesive layer is formed on one side of the elastic film, and any other layer may be laminated. As an example, when illustrated in FIG. 1, in this example, the elastic film 3 and the pressure-sensitive adhesive layer 4 are laminated to form a laminated body 2, and a protective film 5 is placed on the elastic film side of the laminated body 2 of the laminated body. The release sheet 6 is laminated on the pressure-sensitive adhesive layer side.

In this layer structure, after the release sheet 6 is peeled off, the papillary opening of the livestock is covered with the laminate 2 with the protective film 5, and after the coating, the protective film 5 is peeled off so that only the laminate 2 is the livestock. It becomes covered with the nipple opening.

Further, in FIG. 1, the laminated body 2, the protective film 5, and the release sheet 6 are shown as a pair, but not only in that embodiment, a plurality of layers are laminated between the protective film 5 and the release sheet 6. It is also possible to take a mode in which the body 2 is arranged and laminated in the horizontal or vertical direction, or a mode in which a plurality of laminated bodies 2 are arranged and laminated in the horizontal or vertical direction on the protective film 5 and the release sheet 6 is laminated in units of 2 laminated bodies. be able to.

(Elastic film)
In the present invention, the elastic film is a portion that serves as a base material for the papilla patch.

The material of the elastic film is not particularly limited, and examples thereof include an olefin-based elastomer, a styrene-based elastomer, a vinyl acetate-based elastomer, a soft vinyl chloride-based elastomer, and a urethane-based elastomer. Among these elastomers, olefin-based elastomers and urethane-based elastomers are suitable for attaching the laminate (nipple patch) to soft papillae of livestock or the like in a state in which shape followability is particularly good. The size of the elastic film. -The shape is basically the same size and shape as the laminate. The thickness of the film is preferably 10 μm or more and 100 μm or less from the viewpoint of handling.

Further, the elastic film is preferably colored. By this coloring, it is possible to easily visually recognize that the laminated body is attached even in a dark barn. As a result, the pasting work and the confirmation of the state after pasting become easy. At that time, it is preferable to use a colorant having higher safety.

(Adhesive layer)
In the present invention, the pressure-sensitive adhesive used for the pressure-sensitive adhesive layer (the pressure-sensitive adhesive layer 4 in FIG. 1) is an acrylic pressure-sensitive adhesive containing poly (meth) acrylate, which is safe for livestock papillae and causes a rash. It is important to avoid it.

As the poly (meth) acrylate, one or a plurality of known mixtures can be used without particular limitation, and examples thereof include polybranched alkyl acrylates and methyl methacrylate-based copolymers.

Specifically, examples of the polybranched alkyl acrylate include polymers of monomers such as isobutyl acrylate and 2-ethylhexyl acrylate, and a copolymer using two or more of these monomers may be used. Examples of the methyl methacrylate-based copolymer include a butyl acrylate-methyl methacrylate copolymer and the like.

Among them, an isobutyl acrylate-2-ethylhexyl acrylate copolymer or a mixture of an isobutyl acrylate-2-ethylhexyl acrylate copolymer and a butyl acrylate-methyl methacrylate copolymer can be preferably used.

The acrylic pressure-sensitive adhesive containing the poly (meth) acrylate may contain other components as long as the effects of the present invention are not impaired.

The pressure-sensitive adhesive layer 4 is laminated on at least one side of the elastic film 3. As a matter of course, the surface on which the pressure-sensitive adhesive layer 4 is laminated is in contact with the nipple opening and the side surface of the nipple. The pressure-sensitive adhesive layer 4 may be laminated on all or a part of one side of the elastic film 3 as long as it is on one side. However, considering the productivity of the laminated body (nipple patch), the adhesiveness to the papilla, and the like. It is preferable that the pressure-sensitive adhesive layer 4 is formed on the entire surface of one side of the elastic film 3.

The thickness of the pressure-sensitive adhesive layer 4 is not limited as long as sufficient adhesiveness to the papilla can be ensured, and is usually preferably 1 μm or more and 50 μm or less.

(Protective film)
The protective film arbitrarily used in the present invention makes it possible to prevent the elastic films from being deformed during storage and to prevent the elastic films from adhering to each other.

The material of the protective film is not particularly limited, but it is preferable to use a film having elasticity and having a tensile elastic modulus larger than that of the elastic film. From this point of view, various thermoplastic resin films such as polyester films such as polyethylene terephthalate (PET) and olefin resin films such as polyethylene and polypropylene are used as the protective films, among which polypropylene films and polyesters are used. Films are particularly suitable. Further, depending on the purpose, a transparent film may be used, or a translucent or opaque film may be used.

The thickness of the protective film is preferably 30 μm or more, and more preferably 40 μm or more in consideration of operability. The upper limit of the thickness of the protective film is not particularly limited, but is preferably 300 μm or less in consideration of operability and economy.

Further, the size is not particularly limited as long as the laminated body can be protected.

(Release sheet)
The release sheet arbitrarily used in the present invention makes it possible to prevent the pressure-sensitive adhesive layers and the pressure-sensitive adhesive layers and the protective film from adhering to each other during manufacturing and storage.

The material of the protective film is held by the adhesive layer when not in use, but is preferably formed of a material that can be easily peeled off. In view of this point, the release sheet is preferably a release paper such as silicone paper.

Further, the size is not particularly limited as long as it can prevent the adhesive layer of the laminated body from adhering to another layer. Further, the size of the protective film may be the same, and any of the release sheet> protective film and the release sheet <protective film may be adopted depending on the purpose.

(Nipple patch)
In the present invention, the papillary patch is composed of a laminate having the elastic film and the pressure-sensitive adhesive layer. The shape is not particularly limited, and any shape may be used. As an example, as shown in FIG. 2, in this example, the laminate 2 has a nipple opening protection portion 8 attached to the nipple opening and a plurality of nipples attached to the side surface of the nipple connected to the nipple opening protection portion 8. It has a side surface protection portion 9, and an adhesive layer is laminated on the nipple opening protection portion 8 and the nipple side surface protection portion 9. In the case of the shape illustrated in FIG. 2, the plurality of papillary side protection portions 9 exist independently of each other. Then, at least one of the adjacent papillary side protection portions 9 has a structure in which they overlap when attached to the papillary.

FIG. 2 shows an example of the case where the nipple opening protection portion 8 is circular, and the diameter d corresponds to the diameter of the nipple opening protection portion 8. This diameter d is appropriately selected according to the size of the teat mouth of the livestock to be used, but usually the range of 25 to 35 mm is selected.

In addition, when using the nipple patch for livestock of the present invention, a bactericidal disinfectant can be applied to the nipple opening or a bactericidal disinfectant can be injected into the milk duct before being applied to the nipple. Further, the operation of wiping with a wet tissue containing the bactericidal disinfectant may be performed.

Hereinafter, a dairy cow, which is a domestic animal, will be described as an example.

FIG. 3 shows a dairy cow 10 which is an example of livestock. The dairy cow 10 has a udder 11, and a teat 12 hangs down from the udder 11. As shown in FIG. 4, there is a milk duct 13 inside the nipple 12. The symbol U indicates the upper part of the papilla 12. Reference numeral L indicates the lower part of the papilla 12. The milk duct 13 extends in the vertical direction of the nipple 12. The lower end of the milk duct 13 is open to the outside of the lower end of the nipple 12. This opening is the nipple opening 14. When the operator milks, that is, when the teat 12 is squeezed, the milk of the dairy cow flows down the milk duct 13 and is taken out from the teat mouth 14.

About half a day during the milking period, which is the period for milking dairy cow 10, and one week during the dry period (for example, early dry milk and late dry milk before calving), which is easily infected by bacteria and the like. For a while, the laminate 2 as a pad is attached to the tip of the teat 12 so as to cover the teat mouth 14 of the cow 10. In addition, the laminate 2 as a pad is attached to the tip of the teat 12 for 10 days or more, preferably about 2 weeks, in order to surely prevent infection during the dry milk period regardless of individual differences in livestock.

Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to the following examples.

Hereinafter, in Examples, an acrylic pressure-sensitive adhesive composed of a urethane-based elastomer having a thickness of 20 μm as an elastic film, an isobutyl acrylate-2-ethylhexyl acrylate copolymer having a thickness of 20 μm as a pressure-sensitive adhesive layer, and a butyl acrylate-methyl methacrylate copolymer is used. It was made into a laminated body. A biaxially stretched polypropylene having a thickness of 60 μm was used as a protective film, and a silicone paper having a thickness of 75 μm was used as a release sheet, and the protective film, the laminate, and the release sheet were laminated in this order to form a livestock papillary pad assembly. Got ready.

The "adhesive strength", "back surface peeling strength", and "tackiness" of the laminated body were evaluated.

In the measurement of the adhesive strength and the like, those affected by the elongation of the elastic film were measured by lining the back surface with a polyethylene terephthalate film to eliminate the influence of the elongation of the elastic film.

Hereinafter, "adhesive strength", "back surface peeling strength", and "tackiness" will be described with reference to FIGS. 1 to 4.

Adhesive materials such as adhesive tapes can generally be characterized by "adhesive strength" (ie, peeling power), "tackiness" (ie, stickiness). Adhesive strength is considered to be a guideline for permanent adhesion. Tackiness is considered to be a guideline for instantaneous adhesiveness. The method for measuring "adhesive strength" and "tackiness" is defined by, for example, the JIS Z 0237 standard. The roller used in the test was a manual crimping measure of 2 kg, the roller was reciprocated twice for crimping, and various measurements were taken 20 minutes after crimping.
"Adhesive force":
The adhesive strength can be measured by, for example, a peel adhesive strength test method. The peel adhesive strength test method is a method of measuring the force required to peel off a sample in an angle of 180 ° after attaching the sample to a test plate. In the present invention, it is defined as a force when a sample having a width of 25 mm is peeled off. The adhesive strength is preferably 5 N / 25 mm or more. When the adhesive strength is 5 N / 25 mm or more, the adhesion of the laminate attached to the papilla to the papilla is further enhanced. In addition, even if the keratin of the nipple becomes old over time, it can be more stable and can be attached to the nipple for a long period of time.

Since the nipple 12 is skin, it is generally difficult for an object to stick to it. If the adhesive strength of the laminate 2 is less than 5N / 25 mm, the laminate 2 will not be properly attached to the papilla 12 and will be peeled off. Furthermore, even if it can be attached, it becomes difficult to attach it for a long period of time because the keratin of the nipple becomes old.

On the other hand, the upper limit of the adhesive strength of the laminated body 2 is not particularly limited, but is preferably 50 N / 25 mm or less. Since livestock are living things, an unexpected situation may occur. In such a case, it is necessary to remove the laminate 2 attached to the teat. By setting the adhesive strength to 50 N / 25 mm or less, even if the laminate 2 is removed in a shorter period than planned, the laminate 2 can be easily removed from the papilla. That is, by setting the adhesive strength to 50 N / 25 mm or less, even if the laminated body 2 is removed from the papilla in a relatively short period of time even though the soft laminated body 2 is used, the laminated body 2 is used. 2 is hard to tear and can be easily removed.

For example, in the case of dairy cows, they may suddenly give birth during the period considered to be the dry period. In this case, it may be necessary to remove the laminate 2 attached to the teat within, for example, within 3 days in order to collect the milk to be given to the calf born. In this case, since the laminate 2 of the present invention is soft, if a large amount of old keratin is not generated on the nipple, the laminate 2 is torn when it is removed from the nipple, and it takes time and effort to remove it. In order to deal with such a case, by setting the adhesive strength of the laminated body 2 to 50 N / 25 mm or less, even if it is removed from the papilla in a relatively short period of time, the laminated body 2 is not torn from the papilla. You will be able to remove it.

Therefore, in order to achieve a high degree of both long-term stable attachment to the teat and removal from the teat in a relatively short period of time, the adhesive strength of the laminate 2 is as follows. It is preferably in the range. Specifically, it is preferably 5N / 25mm or more and 50N / 25mm or less, and more preferably 10N / 25mm or more and 45N / 25mm or less.
"Backside peel strength":
In the present invention, in the laminated body 2, the surfaces on the opposite side of the surface on which the pressure-sensitive adhesive layer 4 is laminated are superposed on each other using a roller at 23 ° C. and 2 kg, and then the superposed laminated body 2 is peeled off. It is preferable that the strength (hereinafter, may be simply referred to as “back surface peeling strength”) is 5 N / 25 mm or more and 30 N / 25 mm or less. This measurement condition is in accordance with JIS Z0237.

When the back surface peeling strength satisfies the above range, an excellent effect is exhibited when the laminated body 2 has a shape having an overlapping portion. That is, the surfaces of the laminate 2 on the opposite side of the pressure-sensitive adhesive layer 4 adhere to each other with appropriate adhesive strength. As a result, even if the laminated body 2 attached to the papilla is lifted, the surfaces are in close contact with each other, so that the floating can be eliminated. As a result, the laminate 2 is less likely to peel off from the papilla, and bacteria and the like are less likely to invade between the papilla and the laminate 2. Further, if the back surface peeling strength is within the above range, the laminated body 2 can be attached to the papilla with good operability. In order to make the above effect more remarkable, the back surface peeling strength is more preferably 10 N / 25 mm or more and 25 N / 25 mm or less, and further preferably 10 N / 25 mm or more and 20 N / 25 mm or less.
"Tackiness":
Tackiness is considered to be a guideline for instantaneous adhesiveness. The tackiness is the degree of so-called stickiness. Tackiness, that is, stickiness and adhesive strength are completely different factors. For example, sticky notes are products that are highly sticky but have low adhesive strength.

In the present invention, the tack measuring method adopted in JIS Z 0237 is applied. The tilt angle specified in JSI Z 0237 is 20 °, 30 °, or 40 °, but in the present invention, the tilt angle is 15 ° for the purpose of evaluating tackiness with higher accuracy. did. That is, at least one of 32 types of steel balls having a diameter of 1/32 inch to 1 inch is rolled on an inclined plate having an inclination angle of 15 °, and the ball number having the maximum diameter stopped on the adhesive surface is specified as a value indicating tackiness. .. This value is the ball tack number in the embodiment of the present invention.

If the ball tack number is smaller than 3, the instantaneous adhesive force of the laminated body 2 becomes small, so that the laminated body 2 may be peeled off immediately after being attached to the papilla 12. If the ball tack number is set to 3 or more, the bonded state of the laminated body 2 can be stably maintained immediately after the laminated body 2 is attached to the papilla 12 or within a short time after the attachment. Since livestock such as dairy cow 10 often move around, it is a great advantage for a pad for livestock that a stable adhesive state can be established instantaneously.

On the other hand, the upper limit of the ball tack number is not particularly limited. However, if the ball tack number is larger than 30, the thickness of the pressure-sensitive adhesive layer must be increased, which makes industrial production difficult and tends to reduce operability when attached to the papilla. Therefore, it is more preferable that the ball tack number is 30 or less.

Table 1 shows the results of physical property evaluation of the laminated body.

Example 1
(Adhesion maintenance evaluation by dairy cows)
Using the teat mouthpiece component, the laminate (papillary mouthpiece) was attached to the teat of three Holstein cows as shown in FIG. 4, and the adhesive retention was evaluated.
The results are shown in Table 2.

The three Holstein cows tested this time are all dry cows. Before applying the protective patch, the dirt and sebum on the tip of the nipple were wiped off with a wet tissue.

The adhesion state of the protective patch was evaluated on a 4-point scale according to the following criteria.

3: No peeling or floating of the protective patch from the nipple.

2: The end of the protective patch is floating.

1: The end of the protective patch is completely peeled off.

0: The entire protective patch is completely peeled off.
(Evaluation of sticking operability of laminated body)
The application to the nipple was carried out as follows. First, the release sheet is separated from the teat mouth pad assembly, and the pressure-sensitive adhesive layer 4 is brought into close contact with the teat. Then, by separating the protective film from the laminated body, the laminated body is attached to the papilla. At this time, the operability was evaluated by the following method.
(Operability evaluation-1; Evaluation at the time of initial application)
3: When the pressure-sensitive adhesive layer 4 was brought into close contact with the papilla, it adhered to the papilla without any problem in all the tests.

2: When the pressure-sensitive adhesive layer 4 was brought into close contact with the nipple, some of the 12 times were not sufficiently adhered to the nipple in a test of 1 time or more and 4 times or less.

1: When the pressure-sensitive adhesive layer 4 was brought into close contact with the nipple, there were some that did not sufficiently adhere to the nipple in 5 or more tests out of 12 times.
(Operability evaluation-2; Evaluation when the protective film is separated)
3: When the protective film was separated after the laminate was attached to the papilla, the protective film could be separated without any problem in all the tests.

2: When separating the protective film after attaching the laminate to the papilla, 1 or more times out of 12 times 4
In the tests less than once, the laminates were in close contact with each other and could not be attached well (re-doing was necessary).

1: When the protective film was separated after the laminate was attached to the nipple, the laminates were in close contact with each other in 5 or more tests out of 12 times and could not be attached well (re-doing was necessary). ..
(Evaluation of operability for removing laminated bodies)
Apart from the above-mentioned adhesive maintenance evaluation, the operability (removal operation evaluation) when removing the laminate once attached to the papilla was evaluated. This removal operability evaluation is based on the assumption that the laminate attached to the nipple is removed in a hurry due to an unexpected situation, and the laminate is removed from the nipple 3 days after the laminate is attached to the nipple. The operability at the time of operation was evaluated by the following method. In the removal operation evaluation, when a defective product is found in the sticking operability evaluation, the laminate is reattached and the one attached to the papilla in a clean state is evaluated. It was.

3: When the laminate was removed from the papilla 3 days after application, the laminate could be removed without tearing in all the tests.

2: Three days after application, when the laminate was removed from the papilla, the laminate was torn in 1 to 4 trials out of 12 times.

1: Three days after application, when the laminate was removed from the papilla, the laminate was torn in 5 or more tests out of 12 times.

2. 2. Laminated body 3. Elastic film 4. Adhesive layer 5. Protective film 6. Release sheet 8. Nipple mouth protection section 9. Nipple side protection 10. Dairy cow 11. Breast 12. Nipple 13. Breast duct 14. Nipple opening d. Diameter E. Wide part L1. Vertical length L2. Lateral length

Claims (1)

A patch to be attached to the teat of livestock to protect the teat mouth of the livestock. The patch is composed of a laminated body in which an adhesive layer is laminated on one side of an elastic film, and the adhesive layer is poly ( Meta) A domestic papilla patch characterized by containing an acrylate.

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