JPH11115090A - Hot contact bonding type marking film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the bonding of a marking film, which is equipped with a film main body, a PET film peelably provided on the top surface of the film main body and an adhesive bond provided on the under surface of the film main body and hot contact-bonded to a coating material such as a fabric, a base material or the like, even to the coating material such as a fabric, to which a water repellent finishing treatment is applied, or the like. SOLUTION: An adhesive bond 3 has a two-layered structure consisting of a pressure-sensitive adhesive layer 3a, which is arranged on a film main body 1 side and has the thickness of 1-100 μm, and a hot melt adhesive layer 3b, which is arranged on the side opposite to the film main body 1 of the pressure-sensitive adhesive layer 3a, made of low melting point hot melt adhesive having the melting point of 130 deg.C or lower and has the thickness of 1-50 μm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermo-compression type marking film which is cut into a predetermined shape and thermo-compression-bonded to a material to be bonded such as cloth, and more particularly to a water-repellent treatment such as a rain coat or a ground coat. The present invention relates to a measure for improving the adhesiveness to a fabric, a substrate, or the like.

[0002]

2. Description of the Related Art Generally, in this type of marking film, as shown in FIG. 7, a film body b composed of a colored layer c and a white layer d, and one surface of the film body b (upper surface in FIG. ), A support e such as a PET film or release paper, which is releasably provided, and an adhesive layer provided on a surface of the film body b opposite to the support e (a lower surface in the figure). f.

Conventionally, the adhesive layer f is made of a hot-melt adhesive that exhibits an adhesive force when melted by heating, and the marking film a is bonded using a computer-controlled cutting machine or the like. After cutting only the layer f and the film body b into a predetermined shape and removing unnecessary portions of the adhesive layer f and the film body b,
The adhesive layer f is superimposed on the adherend g such as a fabric or a base material so as to face the adherend g, and heated and adhered while being pressed from above the support e by a hot press or the like. By peeling off the support e, letters, numerals, logo marks, etc. can be displayed decoratively.

[0004]

However, the adhesive layer f of the conventional thermocompression-bonding type marking film a is applied to an adherend g which has been subjected to a water-repellent treatment such as raincoat or ground coat with silicon or fluorine. Has the disadvantage that it is difficult to adhere. That is, generally, a hot melt adhesive has a property that it is difficult to adhere to such a water-repellent surface.

[0005] By the way, some types of hot-melt adhesives can be sufficiently bonded to a water-repellent surface, but the melting point of such hot-melt adhesives generally exceeds 130 ° C. If the material g is made of nylon, polyester, or the like, it cannot be used because such high heat causes shrinkage deformation. Even if the heating is performed at a low temperature of 130 ° C. or less, a sufficient adhesive force to such a water-repellent surface cannot be obtained only with a hot melt adhesive.

Therefore, it is conceivable that the adhesive layer f is constituted by an adhesive instead of the hot melt adhesive, and the adhesive is adhered to the water-repellent surface by utilizing the stickiness of the adhesive. . In other words, the pressure-sensitive adhesive does not show the strong adhesive strength of a normal adhesive, but due to the "stickiness", "stickiness", and "stretching like a string" of the pressure-sensitive adhesive, it can be applied to the water-repellent surface. The purpose is to obtain adhesiveness.

However, in the case of the above-mentioned pressure-sensitive adhesive, there is a problem that "stickiness (blocking)" occurs at room temperature. That is, if the adhesive layer f has stickiness at room temperature, another problem that the workability when cutting the marking film or removing unnecessary portions after the cutting is deteriorated is caused. Simply forming the adhesive layer f with a pressure-sensitive adhesive is not practical.

The present invention has been made in view of the above-mentioned points, and a main object of the present invention is to provide a marking film which is thermocompression-bonded to an adherend such as a fabric or a base material, which has been subjected to a water-repellent treatment. When using an adhesive in the adhesive layer so that it can also adhere to the adhesive, by devising the structure of the adhesive layer, without impairing the adhesiveness of the adhesive during thermocompression bonding, An object of the present invention is to prevent the occurrence of blocking of an adhesive at room temperature.

[0009]

In order to achieve the above object, according to the present invention, the adhesive layer has a two-layer structure of an adhesive layer and a surface treatment layer, and the adhesive layer is blocked by the surface treatment layer. On the other hand, at the time of thermocompression bonding, the surface treatment layer was heated and melted so as not to hinder the adhesiveness of the pressure-sensitive adhesive layer. Further, by forming the surface treatment layer with a hot melt adhesive, a sufficient adhesive force can be obtained immediately after thermocompression bonding.

More specifically, according to the first aspect of the present invention, the film body, a support provided on one surface of the film body in a releasable manner, and a surface of the film body opposite to the support. And a thermocompression-type marking film provided with an adhesive layer provided on the substrate.

[0011] Then, the adhesive layer is provided with a pressure-sensitive adhesive layer disposed on the side of the film main body, and a surface treatment layer which is disposed on the side of the pressure-sensitive adhesive layer opposite to the film main body and is heated and melted. And a two-layer structure consisting of

In the above construction, in the adhesive layer of the thermocompression bonding type marking film, the occurrence of blocking of the pressure-sensitive adhesive layer is prevented beforehand by the surface treatment layer. Therefore,
Deterioration of the workability of the marking film due to such blocking is avoided. When the marking film is cut into a predetermined shape and thermocompression-bonded to an adherend, the heat causes the surface treatment layer to melt, and the adhesive layer is coated so as to break through the melted surface treatment layer. It comes into contact with the material. Therefore, the adhesive strength of the pressure-sensitive adhesive layer to the adherend is exhibited without being hindered by the surface treatment layer.

According to a second aspect of the present invention, in the first aspect of the present invention, the pressure-sensitive adhesive layer is formed by adding a crosslinking agent to the pressure-sensitive adhesive.

In the above configuration, the adhesive of the adhesive layer is
The addition of the cross-linking agent enhances the cohesive force, and accordingly increases the adhesive force to the adherend.

According to a third aspect of the present invention, in the first or second aspect,
In the invention, the thickness of the pressure-sensitive adhesive layer is 30 to 100 μm
It is assumed that it is set in the range of.

In the above structure, the pressure-sensitive adhesive layer has a thickness of 3
Since the thickness is set in the range of 0 to 100 μm, insufficient adhesive strength such as when the thickness of the adhesive layer is less than 30 μm is avoided. On the other hand, when the thickness of the adhesive layer exceeds 100 μm The exudation of the adhesive at the time of hot pressing, which is liable to occur, is suppressed, which prevents the extruded adhesive from adhering to the support and causing a peeling failure of the support beforehand. .

According to a fourth aspect of the present invention, in the first to third aspects, the surface treatment layer is made of a low melting point material having a melting point of 130 ° C. or less.

In the above configuration, when the marking film is thermocompression-bonded to the adherend, the surface treatment layer is kept at 130 ° C.
Since the melting is performed at the following heating temperature, the heating temperature at the time of thermocompression bonding to the marking film can be 130 ° C. or less. Therefore, even when the adherend is one that causes thermal deterioration such as shrinkage deformation due to heat exceeding 130 ° C., such as nylon or polyester, the thermocompression bonding of the marking film is performed without such thermal deterioration. .

In a fifth aspect of the present invention, in the first to fourth aspects, the surface treatment layer is a hot melt adhesive layer.

In the above configuration, when the surface treatment layer is heated and melted during thermocompression bonding of the marking film,
Since the surface-treated layer is a hot-melt adhesive layer, the adhesive strength as an adhesive layer is increased by the amount of the hot-melt adhesive as compared with the case where the surface-treated layer is simply a blocking preventing layer. At this time, the hot melt adhesive has a property of exhibiting an adhesive force within a short time after the completion of the thermocompression bonding. When the adhesive layer is combined with a pressure-sensitive adhesive having the property that the adhesive layer exhibits the adhesive force, the adhesive force of the adhesive layer to the adherend can be properly exhibited from an initial stage immediately after thermocompression bonding.

According to a sixth aspect of the present invention, in the above fifth aspect, the thickness of the hot melt adhesive layer is 1 to 50 μm.
It is assumed that it is set in the range of m.

In the above configuration, since the thickness of the hot melt adhesive layer is set in the range of 1 to 50 μm,
The situation where it is difficult to sufficiently prevent the blocking of the pressure-sensitive adhesive layer as in the case where the thickness of the hot-melt adhesive layer is less than 1 μm is avoided, while the thickness of the hot-melt adhesive layer is reduced. Is larger than 50 μm, the effect of inhibiting the adhesive force of the adhesive layer is superior to the effect of exhibiting the adhesive force of the hot melt adhesive itself during thermocompression bonding, and the adhesive force as the adhesive layer is reduced. It is also possible to avoid the situation that it is easy to cause the problem.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows the entire structure of a thermocompression-bonding type marking film A according to an embodiment of the present invention. After the marking film A is cut into a predetermined shape, a water-repellent material such as a rain coat or a ground coat is used. It is used for bonding to a treated cloth g as an adherend.

The marking film A includes a film main body 1, a support 2 releasably provided on one surface (the upper surface in FIG. 1) of the film main body 1, and a support 2 for the film main body 1. And an adhesive layer 3 provided on the surface on the opposite side (the lower surface in the figure).

More specifically, the film main body 1 includes a colored urethane layer 1 disposed on the side of the support 2 (upper side in FIG. 1).
a, and a white urethane layer 1b disposed on the side of the adhesive layer 3 (the lower side in the figure). These urethane layers 1a, 1b
Polyurethane resins are mainly used for the above-mentioned materials, and both or one of an acrylic additive and a silicon-based additive are added to each polyurethane resin. Further, in the case of the colored urethane layer 1a, a colorant of a predetermined color is added, and in the case of the white urethane layer 1b, a white colorant is added.
It has sufficient hiding power to the base. The thickness of the colored urethane layer 1a is, for example, 30 μm,
The thickness of the white urethane layer 1b is set to, for example, 20 μm.

The support 2 has a thickness of, for example, 100 μm.
The marking film A has sufficient heat resistance and dimensional stability when thermocompression-bonded, and hinders the cutting operation when the marking film A is cut. It is not expected.

In this embodiment, the adhesive layer 3
Is a pressure-sensitive adhesive layer 3a arranged on the side of the film body 1 (upper side in FIG. 1), and the film body 1 of the pressure-sensitive adhesive layer 3a
And a hot-melt adhesive layer 3b as a surface treatment layer which is heated and melted.

Specifically, the pressure-sensitive adhesive layer 3a is made of a pressure-sensitive adhesive such as acrylic or polyester.
Its thickness is in the range of 30 to 100 μm, preferably 40 to 100 μm.
It is set in the range of 70 μm. That is, the adhesive layer 3
If the thickness of “a” is less than 30 μm, sufficient adhesive strength cannot be obtained, while if it exceeds 100 μm, the adhesive will ooze out and adhere to the support 2 during thermocompression bonding. 2
When peeling, the corner portion of the marking film A is easily peeled. In particular, in the case of an acrylic resin, a crosslinking agent (isocyanate) is added to increase the cohesive force of the pressure-sensitive adhesive.

On the other hand, the hot melt adhesive layer 3b
Polyester-based material, urethane-based material, acrylic-based material, nylon-based material, or a low-melting hot-melt adhesive having a melting point of 130 ° C. or less made of a mixture thereof, the thickness is in the range of 1 to 50 μm, Preferably 2
It is set in the range of ３０30 μm. That is, if the thickness of the hot melt adhesive layer 3b is less than 1 μm, the occurrence of blocking of the pressure-sensitive adhesive layer 3a cannot be sufficiently prevented, while if it exceeds 50 μm, the hot melt adhesive Pressure-sensitive adhesive layer 3a
Therefore, the action of inhibiting the adhesive strength of the adhesive layer becomes superior, and the adhesive strength of the adhesive layer 3 is easily reduced.

Next, the thermocompression-type marking film A
Will be described with reference to FIGS. 2 to 5. First, as shown in FIG. 2, the thermocompression-bonding type marking film A has a planar shape for performing a predetermined display (in the example shown, the shape of a capital letter H in the alphabet).
Cut into pieces. The method uses a computer controlled cutting machine, for example, to input a predetermined shape into a computer and cut only the adhesive layer 3 of the marking film A and the film body 1. And, as shown in FIG.
Unnecessary portions of the adhesive layer 3 and the film body 1 are removed. Next, as shown in FIG. 4, a hot press machine B including a press lower plate 11 and a press upper plate 12 that can move up and down with respect to the press lower plate 11 is used. The above-mentioned marking film A is positioned on the cloth g placed thereon, and the adhesive layer 3 is superimposed on the cloth g so as to face the cloth g. Heating while sandwiching between.
Specifically, for example, a hot press is performed at a heating temperature of 125 ° C. for 5 seconds while applying a load of 560 g per 1 cm ² . Thereby, the hot melt adhesive layer 3b of the adhesive layer 3 is melted, and the pressure-sensitive adhesive layer 3a comes into contact with the fabric g and becomes sticky. Then, first, the adhesive strength of the hot melt adhesive of the hot melt adhesive layer 3b is exerted immediately after the completion of the hot pressing, and then the adhesive force of the adhesive layer 3a is gradually exerted over time. Become. Then, after cooling at room temperature for about 4 minutes, the support 2 is peeled off from the surface of the film body 1. Now, FIG.
As shown in the figure, predetermined characters are displayed on the surface of the fabric g that has been subjected to the water repellent treatment.

Therefore, according to the present embodiment, the film main body 1, the support 2 provided on one surface of the film main body 1 so as to be peelable, and the film main body 1 on the opposite side to the support 2 of the film main body 1. In the thermocompression-bonding type marking film A provided with the adhesive layer 3 provided on the surface,
An adhesive layer 3a disposed on the side of the film body 1;
Since the pressure-sensitive adhesive layer 3a is arranged on the side opposite to the film body 1 and has a two-layer structure with a hot-melt adhesive layer 3b made of a low-melting hot-melt adhesive having a melting point of 130 ° C. or less, At the time of cutting work of the marking film A or the like, the hot melt adhesive layer 3b can prevent blocking of the pressure-sensitive adhesive layer 3a to obtain good workability, while the hot melt adhesive layer 3b at the time of thermocompression bonding. Is melted, the adhesive force of the pressure-sensitive adhesive layer 3a can be sufficiently exerted. In addition, the hot-melt adhesive layer 3a is combined with the adhesive force exerted immediately after thermocompression bonding to provide water repellency. Fabric g that has been processed
The thermocompression-bonding type marking film A can be appropriately adhered from the initial stage immediately after thermocompression bonding.

In the above embodiment, the pressure-sensitive adhesive layer 3a is formed by adding a cross-linking agent to the pressure-sensitive adhesive. However, when a sufficient adhesive force can be obtained with the pressure-sensitive adhesive alone, the cross-linking is particularly preferable. The agent need not be added.

In the above embodiment, the hot melt adhesive layer 3b is made of a low melting point hot melt adhesive having a melting point of 130 ° C. or less. Alternatively, depending on the physical properties of the fabric g with respect to heat, the fabric g may have a melting point exceeding 130 ° C.

Further, in the above embodiment, the surface treatment layer (hot melt adhesive layer) is constituted by the hot melt adhesive. However, for example, when the adhesive force by the hot melt adhesive is unnecessary. May be provided with a surface treatment layer as a simple anti-blocking layer.

In the above embodiment, the film body 1
Is provided with a white urethane layer 1b, but such a white urethane layer 1b can be omitted depending on the design of the marking film A.

In the above embodiment, the film body 1
Is mainly made of urethane resin, but another material may be used as a constituent material of the film body.

Further, in the above embodiment, the PET film is used as the support 2, but another material such as a polypropylene film may be used.

(Experimental Example 1) Here, an experiment of the adhesive performance performed by producing the thermocompression-bonding type marking film according to the above embodiment will be described. First, the method for producing the above marking film will be described.
A colored urethane layer having a thickness of 30 μm and a white urethane layer having a thickness of 20 μm were sequentially formed as a film main body on a PET film as a support.
Then, a pressure-sensitive adhesive layer having a thickness of 50 μm is formed thereon, and after aging for 2 days in an environment of 40 ± 5 ° C.,
A hot melt adhesive layer having a thickness of 100 μm was formed thereon.

The above PET films include Unitika Co., Ltd.
"Emblet (trade name)" manufactured by KK was used. Further, the colored urethane layer includes "Luckskin U-2245 (trade name)" which is a urethane-based material manufactured by Seiko Chemical Co., Ltd. and "UAC" which is a modified acrylic material manufactured by Tokusekisho Kogyo Co., Ltd. -43 (trade name) ".
The composition was such that the modified acrylic material was 30 parts by weight with respect to 100 parts by weight of the urethane-based material (including the pigment). In addition, the white urethane layer has a urethane-based material “Rezamine ME2825LP” manufactured by Dainichi Seika Kogyo Co., Ltd.
(Product name) ". The white pigment was added in an amount of 30 parts by weight based on 100 parts by weight of the urethane-based material.

The pressure-sensitive adhesive layer has "SK Dyne 1604N (trade name)", an acrylic ester resin manufactured by Sogo Chemical Co., Ltd., and "L-45", a cross-linking agent (isocyanate) manufactured by Sogo Chemical Co., Ltd. (Trade name) "and" B-117 (trade name) "which is a modified acrylic material manufactured by Honey Kasei Co., Ltd. The blending was such that the modified acrylic material was 40 parts by weight based on 60 parts by weight of the acrylate resin. The crosslinking agent was added in an amount of 0.83 parts by weight. On the other hand, Nippon Matai Co., Ltd.
"H608 (trade name)", which is a urethane-based material manufactured by Hitachi, Ltd., was used.

Next, as the water-repellent cloth, "Gore-Tex (registered trademark)" manufactured by Japan Gore-Tex Co., Ltd., which has been subjected to fluorine processing, is used, and the marking film is placed on the cloth. After applying a load of 560 g per cm ² at a heating temperature of 125 ° C. using a hot press machine and performing a hot press for 15 seconds, the PET film is peeled off after cooling at room temperature for about 4 minutes did.

Immediately after the completion of the hot pressing, the change in the adhesive force between the pressure-sensitive adhesive layer and the hot-melt adhesive layer was changed by one.
Measured over time over time. The results are shown in FIG.

As can be seen from FIG. 6, the hot melt adhesive layer exhibits a high level of adhesive force (approximately 1.0 kg / cm) immediately after completion of hot pressing, but at the time when approximately 4 minutes have passed. From that time, the adhesive strength drops sharply,
At the time when the minute has passed, the adhesive strength is already 0.4 kg / cm
However, since then, it has remained at a stable level of 0.3 kg / cm or more.

On the other hand, the pressure-sensitive adhesive layer still exhibits only a low level of adhesive force immediately after completion of hot pressing, but the adhesive force increases with the passage of time. The adhesive strength of the agent layer was reversed and exceeded it, and when about 10 minutes had passed, 1.
After reaching a level approaching 0 kg / cm, 0.9 kg / cm
It is stably changing at a level exceeding cm.

Therefore, as the adhesive layer, 1.2 kg
/ Cm.

(Experimental Example 2) Next, an experiment conducted by producing three kinds of thermocompression-type marking films according to the present invention will be described. First, an adhesive layer having the same thickness of 50 μm was formed on a PET film and a film main body having the same material and thickness as in the case of Experimental Example 1 above.
Aging was performed for 24 hours in an environment of 0 ± 5 ° C. At that time, the composition of the pressure-sensitive adhesive layer was such that the crosslinking agent was 66 parts by weight and the modified acrylic material was 1.0 part by weight based on 100 parts by weight of the acrylate resin.

After the aging was completed, three types of marking films were prepared using two types of materials for the surface treatment layer, and these were designated as Invention Examples 1 to 3.

Specifically, in Inventive Example 1, as the material of the surface treatment layer, “Hybon 7040 (trade name)” which is a saturated polyester material manufactured by Hitachi Chemical Co., Ltd., and the above-mentioned modified acrylic material And were used. The composition was such that the saturated polyester material was 95 parts by weight and the modified acrylic material was 5 parts by weight. Then, an anti-blocking layer as a surface treatment layer having a thickness of 4 μm was provided on the pressure-sensitive adhesive layer.

In Inventive Example 2, "Luck Skin 1358 (trade name)" which is a urethane-based material manufactured by Seiko Chemical Co., Ltd. was used as the material for the surface treatment layer. Then, an anti-blocking layer as a surface treatment layer having a thickness of 4 μm was provided on the pressure-sensitive adhesive layer.

Further, in Inventive Example 3, the same urethane-based material as that of the hot melt adhesive layer of Experimental Example 1 was used as the material of the surface treatment layer, and a thickness of 3 was formed on the adhesive layer.
A hot melt adhesive layer as a surface treatment layer having a thickness of 0 μm was provided.

On the other hand, for comparison, four types of comparative examples 1 to
Comparative Example 4 was produced. Specifically, in Comparative Example 1, the pressure-sensitive adhesive layer was omitted from Inventive Example 3, and the thickness of the hot melt adhesive layer was set to 100 μm. Comparative Example 2
Then, the thickness of the pressure-sensitive adhesive layer in the case of Invention Example 1 is set to 120 μm.
m. In Comparative Example 3, the thickness of the anti-blocking layer in Inventive Examples 1 and 2 was 30 μm. further,
In Comparative Example 4, the thickness of the hot melt adhesive layer in Inventive Example 3 was 60 μm.

For each of Invention Examples 1 to 3 and Comparative Examples 1 to 4, each marking film was cut into a predetermined shape using “SP-500 (trade name)” which is a cutting machine manufactured by Mutoh Kogyo Co., Ltd. Then, unnecessary portions of the adhesive layer and the film main body were removed. Thereafter, using the same fabric as in the above-described Experimental Example 1, the cut marking film was placed on the fabric, and a load of 560 g per cm 2 was applied thereto at a heating temperature of 125 ° C. using a hot press machine. After performing hot pressing for 2 seconds, the PET film was peeled off after cooling at room temperature for about 4 minutes. At this stage,
The surface of the film body is polished by the surface of the PET film. Therefore, a matte heat-resistant release paper was placed on the film main body, and hot-pressed again using a hot press machine under the same conditions as above to perform a matting process.

The above invention examples 1 to 3 and comparative examples 1 to
For each of No. 4, the workability of each evaluation item shown below was examined, and a test based on JIS was performed. The results are shown in Table 1 below.

[0054]

[Table 1]

First, as for the above-mentioned workability, five items, namely, cutting properties, descaling properties, PET peeling properties, matting properties and adhesive strength were examined. Specifically, in cutting properties,
Using a cutter having a blade length of 400 μm in a cutting machine, cutting was performed while applying a load of 70 g to the cutter, and it was determined whether or not the cutter was properly cut at that time. In Table 1 above, those that could be cut without any problems are indicated by “○”, and those that partially had defective cuts are indicated by “△”. In addition, cutting that could be cut without any problem was performed by cutting with the load of the cutter reduced to 40 g, and that that could be cut without any problem is indicated by “◎”.

The above-mentioned scumming property means that at a boundary between a necessary part and an unnecessary part in the cut adhesive layer,
Unnecessary parts are likely to re-adhere to the necessary parts, so the re-adhered parts may remain as residue when removing the unnecessary parts, and in some cases, some of the necessary parts may be re-adhered to the unnecessary parts and lifted This means that such residue is difficult to remain. Then, when the unnecessary part was removed with normal attention, it was determined whether or not the residue was left without lifting the necessary part. In Table 1 above, the case where no residue remains is indicated by “○”, and the case where a part of a necessary portion is lifted up is indicated by “△”. Further, among the residue that did not remain, the residue that did not remain without paying special attention is indicated by “◎”.

With respect to the above PET peelability, it was determined whether or not the PET film could be peeled off without any problem by paying ordinary attention. In Table 1 above, those that passed the test are indicated by “O”, and those that have the adhesive layer turned up are indicated by “X”. And, among the passed ones, those which could be peeled off without any problem without paying special attention are indicated by "◎".

In the above matting properties, it was determined whether or not the film body after peeling off the PET film could be properly matted without any trouble. As a result, as shown in Table 1 above,
Inventive Examples 1 to 3 all passed ("O") as in Comparative Examples 1 to 4.

For the above adhesive strength (unit: kg / cm), after matting, a strip test piece having a width of 2 cm was sampled from the fabric and the marking film adhered to the fabric, and the marking film on the test piece was sampled. Was peeled off in the direction of 180 ° at a speed of 200 mm / min. In Comparative Example 1, since the adhesive strength was extremely low, the heating temperature of the hot press was set to 16
5 ° C., and the adhesive strength at that time is shown. The adhesive strength when the heating temperature is 130 ° C. is shown in parentheses.

On the other hand, as a test based on the above JIS,
Two types were performed. First, in the first test, JIS L
The washing was performed 30 times in accordance with the washing indication of the fabric based on the provisions of “Indication Symbols Regarding Handling of Textile Products and Indication Method” of No. 0217, and the presence or absence of defects in the marking film was examined. Next, in the second test, JISL
Based on the “Testing Method for Dye Fastness to Dry Cleaning” of No. 0860, five dry cleanings were performed to examine the presence or absence of defects in the marking film. In Table 1 above, those with no defects were marked with “○”.
, And those having a defect are indicated by “x”.

In summary, excellent products are marked with “◎”
In Table 1 above, the symbol "に は" indicates that there is no particular problem, the symbol "△" indicates that there is some difficulty, and the symbol "x" indicates that the sample cannot be put to practical use. I have. As a result, Invention Examples 1 to 3 were all excellent, but Comparative Examples 1 to 4 were all unacceptable.

As a specific consideration, in Comparative Example 1, shrinkage occurred in the fabric. This is because the heating temperature was high. On the other hand, if the heating temperature was low, sufficient adhesive strength could not be obtained. In other words, it can be seen that it is difficult to sufficiently bond at a low heating temperature using only the hot melt adhesive.

In Comparative Example 2, although the adhesive strength was sufficient,
There are difficulties in cutting and descaling,
In addition, it was judged that PET peelability was not possible. This is due to the adhesive layer exuding,
Comparison with Inventive Example 1 indicates that the cause is that the pressure-sensitive adhesive layer is too thick.

In Comparative Example 3, although the cutting property, the descaling property, and the PET peeling property were satisfactory, the adhesive strength was too small, and thus both the washing test and the dry cleaning test were impossible. This is because the function of the pressure-sensitive adhesive layer is not sufficiently exhibited, but from the comparison with Inventive Examples 1 and 2, the anti-blocking layer is too thick and inhibits the adhesiveness of the pressure-sensitive adhesive layer. It is considered something. Also, from the comparison with Inventive Example 3, when the surface treatment layer is merely an anti-blocking layer, it has the same layer thickness (30 μm) as when it has an adhesive force like a hot melt adhesive layer. However, it can be seen that a sufficient adhesive strength as an adhesive layer cannot be obtained.

In Comparative Example 4, as in Comparative Example 1, sufficient adhesive strength was not obtained. This is considered to be because the hot melt adhesive layer was too thick and hindered the adhesive force of the pressure-sensitive adhesive layer from the comparison with Inventive Example 3. That is, even if the surface treatment layer has an adhesive force like a hot melt adhesive layer, if it is still too thick (60 μm), the effect of inhibiting the adhesive force of the pressure-sensitive adhesive layer is superior. As a result, it turns out that the adhesive strength as an adhesive layer becomes insufficient.

[0066]

As described above, according to the first aspect of the present invention, the film main body, the support provided releasably on one surface of the film main body, and the support of the film main body In a thermocompression-bonding marking film provided with an adhesive layer provided on the opposite surface, the adhesive layer is provided with an adhesive layer disposed on the film body side and an opposite side of the film body of the adhesive layer. And a surface treatment layer that is heated and melted, so that the surface treatment layer can prevent blocking of the adhesive layer and obtain good workability. At the time of pressure bonding, the surface treatment layer is melted, and the adhesive force of the pressure-sensitive adhesive layer can be sufficiently exerted, and the pressure-sensitive adhesive layer can be appropriately adhered to an adherend such as a cloth subjected to a water-repellent treatment.

According to the second aspect of the present invention, the pressure-sensitive adhesive layer is formed by adding a crosslinking agent to the pressure-sensitive adhesive.
The cohesive force of the pressure-sensitive adhesive can be increased to improve the adhesiveness with the adherend.

According to the third aspect of the present invention, the thickness of the pressure-sensitive adhesive layer is set in the range of 30 to 100 μm. Thus, a sufficient adhesive force can be exerted on the adherend while avoiding the problem described above, so that the effect of the first aspect of the present invention can be properly obtained.

According to the fourth aspect of the present invention, the surface treatment layer is made of a low melting point material having a melting point of 130 ° C. or less. Adhesion can also be made to the material without adversely affecting such heat.

According to the fifth aspect of the present invention, since the surface treatment layer is a hot-melt adhesive layer, the adhesiveness of the hot-melt adhesive exerted within a short period of time after completion of thermocompression bonding makes it possible to form an adhesive. Sufficient adhesion to the adherend can be obtained from the initial stage after completion of thermocompression bonding, where the adhesion of the material layer is not yet sufficiently exhibited.

According to the sixth aspect of the present invention, the thickness of the hot-melt adhesive layer is set in the range of 1 to 50 μm, so that the hot-melt adhesive can be formed without impairing the adhesiveness of the pressure-sensitive adhesive layer. The adhesive strength of the agent layer,
Each adhesive force of the pressure-sensitive adhesive layer and the hot melt adhesive layer can be efficiently exhibited.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically illustrating an entire configuration of a thermocompression-bonding type marking film according to an embodiment of the present invention.

FIG. 2 is a perspective view schematically showing a cut marking film.

FIG. 3 is a perspective view schematically showing a state in which an unnecessary portion of an adhesive layer and a film main body is removed.

FIG. 4 is a cross-sectional view schematically showing a state in which a marking film is pressed on a fabric by a hot press.

FIG. 5 is a cross-sectional view schematically showing a state where the support is peeled off by thermocompression bonding to a fabric.

FIG. 6 is a characteristic diagram additionally showing the time-dependent changes in the respective adhesive strengths of the hot melt adhesive layer and the pressure-sensitive adhesive layer from the completion of hot pressing in Experimental Example 1.

FIG. 7 is a diagram corresponding to FIG. 1, schematically illustrating a configuration of a conventional thermocompression-type marking film.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film main body 2 Support body 3 Adhesive layer 3a Adhesive layer 3b Hot melt adhesive layer (surface treatment layer) A Thermocompression-type marking film g Fabric (adhering material)

Claims (6)

[Claims] 1. A heat source comprising: a film main body; a support detachably provided on one surface of the film main body; and an adhesive layer provided on a surface of the film main body opposite to the support. In the pressure-sensitive marking film, the adhesive layer is a pressure-sensitive adhesive layer disposed on the side of the film main body, and a surface treatment layer that is disposed on the side opposite to the film main body of the pressure-sensitive adhesive layer and is heated and melted. A thermocompression-type marking film comprising: 2. The thermocompression-bonding marking film according to claim 1, wherein the pressure-sensitive adhesive layer comprises a cross-linking agent added to the pressure-sensitive adhesive. 3. The thermocompression-bonding type marking film according to claim 1, wherein the thickness of the pressure-sensitive adhesive layer is set in the range of 30 to 100 μm. 4. The thermocompression bonding marking film according to claim 1, wherein the surface treatment layer is made of a low melting point material having a melting point of 130 ° C. or less. 5. The thermocompression marking film according to claim 1, wherein the surface treatment layer is a hot melt adhesive layer. 6. The thermocompression-bonding marking film according to claim 5, wherein the thickness of the hot-melt adhesive layer is set in a range of 1 to 50 μm.