JPH0332508Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an adhesive transfer sheet, and more specifically, a sheet that accurately and easily transfers a layered hot melt adhesive dotted at intervals in a plane direction onto an adherend surface. Regarding.

(Prior Art) Conventionally, most double-sided adhesive tapes are constructed by pasting a separator of the same width made of paper or the like on one side of an adhesive (layer) and rolling the entire tape.

Therefore, the structure is a two-layer structure consisting of an adhesive and a separator, and the adhesive is bonded to the separator on the upper surface in the rolled state, and the lower surface is bonded to the upper surface of the separator rolled on the lower side. When used, the two-layer structure is rolled out to an appropriate length, cut to an appropriate length, and the lower surface of the adhesive layer is attached to an adherend with the separator still attached. This is done by peeling off the adhesive and pasting another adherend onto the top surface of the adhesive.

In addition, as another embodiment, an adhesive is placed in the middle,
A three-layer structure in which separators are bonded on both sides is also known, but even in this case, the adhesive is bonded to the entire surface of both separators.

In either case, the adhesive used was one that was dissolved in a solvent or an emulsion type adhesive.

(Problems to be Solved by the Invention) However, in such conventional double-sided adhesive tapes, the adhesive is formed on the entire surface in the planar direction corresponding to the width and length of the tape. In the case of the above-mentioned two-layer structure, the separator and the adhesive are brought into close contact with each other, making it difficult to peel them off, resulting in problems such as having to make cuts with a knife or the like and peeling them off. In the case of a three-layer structure, when one of the separators is peeled off, the adhesive present in the middle position may also transfer to the separator side and be peeled off, impeding the double-sided adhesive function and making it inconvenient to handle. It has become a problem such as.

The adherend after being bonded with the above-mentioned conventional double-sided tape is brought into close contact with the adhesive at least in the bonded area, but on the other hand, the bonded area not only becomes incapable of maintaining air permeability; When it is desired to bond only a local part of the adherend, unnecessary parts are also bonded, which is inconvenient.

In addition, solvent-type and emulsion-type adhesives have high fluidity and are suitable for forming thin and wide adhesive layers, but they are difficult to form into dots or lines, and in that state, the adhesive strength is weak.

Therefore, the present invention solves the above problems and transfers the adhesive to the adherend by simply tracing it with your fingers, etc., without using scissors or cutters, on the necessary parts of the bonding surface of most parts as long as it is degreased. made to do,
By using a pressure-sensitive hot-melt adhesive, even when thickly dotted on various shapes, it does not lose its shape and maintains good shape retention, increasing product value both in terms of design and use. Another object of the present invention is to provide an easy-to-handle adhesive transfer sheet that can be used in a wide range of applications.

(Means for Solving the Problem) The above object is to provide a pair of separators 2 and 3 that are spaced apart in parallel to each other and have different peel resistances, as shown in FIG. Numerous pressure-sensitive hot melt adhesives dotted with
... and separator 3 with great peeling resistance.
is made almost transparent and its peeling resistance is smaller than the peeling resistance of the adherend Y to which the unit adhesive n... is transferred. Applying the exposed surface of the adhesive n... to the adherend and pressing the back surface of the separator 3, which has a high peel resistance, against the adherend Z side using finger pressure or the like, the unit adhesive n... has a high peel resistance. This is achieved by the adhesive transfer sheet A designed to be transferred from the separator 3 to the adherend Y.

(Function) To explain the function of the present invention with reference to Fig. 3 A to E, one of the separators 2 and 3 bonded to both sides of the unit adhesive n of the pressure-sensitive hot melt adhesive group 1 may be peeled off. First, the separator 2 with low resistance is peeled off from its peeling surface 2a [Figure A], and the exposed n side of the pressure-sensitive hot melt unit pressure sensitive adhesive is laminated onto one of the adherends Y [Figure B]. After the separation, the unit adhesive n is transferred to the adherend Y side where the peeling resistance is higher by applying the finger F to the upper surface of the separator 3 and pushing it downwardly over the entire surface [Figure A]. Subsequently, the separator 3 is separated from the unit adhesive n to complete the transfer [Figure 2]. After that, another adherend Z is laminated onto unit adhesive n..., and both adherends Y and Z are bonded together by unit adhesive n... interspersed in the plane direction. Obtain something [E diagram].

Through the above operation, both adherends Y and Z are adhered to each other via the pressure-sensitive hot melt unit adhesive n... which is transferred to the required area by simply pressing with fingers, without using scissors or cutters. At the same time, air can be passed between both adherends Y and Z through the gap S between the unit adhesives...n.

Further, the illustrated unit adhesive n... and the shape of the gap S can be changed depending on the material of each adherend, purpose of use, etc.

(Example) Below, other examples related to the present invention are shown in Figures 2 to 3.
This will be explained based on the diagram.

That is, FIG. 2 A, B, and C are developed examples of FIG. 1 showing the configuration of the present invention, and FIG.
The shape of the hot-melt type unit pressure-sensitive adhesives n... is a net-like body, and the figure (b) is a shape consisting of a letter font, and the figure (c) is a shape in which animals, plants, and other picture elements P are formed.

Such pressure-sensitive hot melt adhesive group 1
is made of a hot-melt adhesive mainly composed of, for example, a vinyl copolymer or an ethylene-based copolymer. It is formed into the desired shape by coating (a number of depressions of a predetermined shape are formed on the roller that is in contact with the molten hot melt adhesive bath, and after scooping the molten adhesive into these depressions, the roller circumferential surface is coated with a doctor blade. (Clean it, then apply adhesive to one separator surface).

Also, depending on the purpose, a drug or fragrance may be pre-contained in the adhesive to form a unit adhesive n...
It is also possible to mix pigments to give the desired color.

Then, separators 2 and 3 are adhered to the exposed surfaces of the unit adhesives...n to form an adhesive transfer sheet.

The separators 2 and 3 bonded to both sides of the hot melt adhesive group 1 are made of kraft paper, nonwoven fabric, resin thin film, etc., and their release surfaces 2a and 3a are coated with silicone or plastic resin. The separators 2 and 3 are coated with a mold release agent such as a type of mold release agent, and the peel resistance of the separators 2 and 3 is differentiated depending on the properties of the mold release agent. It has been done.

In addition, the separators 2 and 3 may be made of different materials and combined, or if they are of the same material, one of the separators 2 and 3 may be embossed on the peeling surface, e.g., on the peeling surface 2a side as shown in FIG. 2A. The separators 2 and 3 and the adhesive group 1 are processed by processing E.
It is also possible to make the peel resistance different from each other.

Moreover, if the unit adhesive n... is formed into a shape such as a picture element P as shown in FIG. When the picture elements P etc. are formed on the separator 3 as T, the positions of the unit adhesives n... scattered on the separator 3 can be visually compared and compared with those on the adherend Y. In addition to this, if the separator 2 is also made transparent, design elements such as picture elements P to be transferred to the adherend can be viewed through the sheet before use, giving the impression of paper-cutting. This increases its utility value as a kind of hobby or learning tool.

In other medical applications, if you want to adhere only a small local area, you can transfer it by simply tracing a stroke of the pressure-sensitive hot melt unit adhesive n on sheet A along the shape of the area to be used. By using this, it can be easily carried out while maintaining breathability.

Furthermore, it can be used as a sheet material for the joint tube surface between a medical device and the human abdomen in an artificial anus, etc., and as a fastener for eye patches or ear covers, etc., by adhering it to the human skin, etc., while retaining its temperament. I can do it,
It can also be used to fix sanitary napkins in appropriate positions. On the other hand, if it is used for fixing or adhering building materials to building walls or floors, it can maintain air permeability as described above.
It is possible to prevent dew condensation from occurring at the attachment location.

(Effects of the invention) As described above, in the adhesive transfer sheet according to the invention, the unit hot-melt adhesive is independently placed with a gap between the separators on both sides, and the peeling resistance of both separators is reduced. Since the peeling resistance is made to be different and smaller than the peeling resistance of the adherend surface, during use, there is no problem of the adhesive transferring to the separator on the peeled side or adhesion to unnecessary parts, and the peeling resistance is lower than that of the adherend surface. The unit adhesive can be transferred to the required area simply by tracing it with a finger or the like without using a knife.

Then, due to the transfer of the adhesive group, it is possible to create a breathable part with a gap between the adherend and the adhesive group, which prevents the adhesive area from becoming sticky and forming lumps. , the elasticity of the adherend is not impaired. Further, adherends can be repeatedly brought into contact with and separated from each other by using a hot-melt adhesive group with excellent shape retention.

Furthermore, since it can be formed into various shapes with the above adhesive group, it can be used for a wide range of purposes such as medical, stationery, and construction, unlike conventional double-sided tapes that are simply adapted to the final product. It can be arranged as appropriate and used in a wide variety of ways.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the structure of the adhesive transfer sheet according to the present invention, FIG. 2 A, B, C and FIG. Explanation of symbols, 1... Pressure-sensitive hot melt adhesive group, 2, 3... Separator, 2a, 3a... Peeling surface, E... Embossed surface, b... Bobbin, n
...Unit adhesive, P...picture element, T...transparent sheet.

Claims (1)

[Scope of utility model registration request] A large number of pressure-sensitive hot melt type unit adhesives, which are independently dotted at intervals in the plane direction, are sandwiched between a pair of separators that are spaced apart from each other in parallel and have different peel resistances, and the above-mentioned large peel The separator of the resistor is made almost transparent and its peel resistance is smaller than the peel resistance of the adherend to which the unit adhesive is transferred, so that the separator with low peel resistance is peeled off and the unit adhesive The unit adhesive is transferred from the separator with high peel resistance to the adherend by applying the exposed surface of the separator to the adherend and pressing the back side of the separator with high peel resistance against the adherend using finger pressure or the like. Adhesive transfer sheet designed to make you feel like you're in trouble.