JP6146979B2 - Label form manufacturing method - Google Patents

Description

  The present invention relates to a label form that can be applied to a delivery slip and the like, and a method for manufacturing the label form.

  As a label form such as a slip used for delivery of goods or the like, for example, one having a configuration shown in Patent Document 1 is known. As shown in FIG. 7, this conventional label form t includes a first base material k having a release layer formed on the back surface of thermal paper, a resin layer j formed on the back surface of the release layer, and the resin. An adhesive layer n formed on the back surface of the layer j and a second substrate s made of a separator formed on the back surface of the adhesive layer n are provided. Here, the resin layer j is for preventing the adhesive layer n from exhibiting adhesiveness when the first substrate k is peeled off, and is formed between the first substrate k and the adhesive layer n. The As a manufacturing method of such a label form t, a method of forming the resin layer j and the adhesive layer n by sequentially applying a predetermined resin and adhesive using a coater or the like is excellent in productivity. Are preferably used.

Japanese Patent No. 4729772 (see FIG. 1)

  In the method of manufacturing a label form having the conventional configuration described above, in the method of forming the resin layer by coating, dust or the like adheres when the resin is applied by the coater, thereby causing streaks or cracks in the resin layer. May occur. In the label form in which the streaks or the like are generated, the strength of the resin layer is lowered, and accordingly, there is a concern that the durability of the label form itself is lowered. The adhesion of dust or the like that causes such problems is affected by the environment at the manufacturing site, and it is difficult to eliminate them completely. For this reason, there has been a demand for a material capable of suppressing as much as possible the reduction in strength due to the above-mentioned streaks.

  The present invention is an attempt to solve the above-described problems, and proposes a label form and a method for manufacturing the label form that can suppress a decrease in strength due to streaks or cracks.

  The present invention provides a thermal paper having a release layer formed on the back surface, a resin coating layer formed by coating a predetermined resin on the back surface side of the release layer, and an adhesive on the back surface side of the resin coating layer. In a label form comprising a coated adhesive layer and a peelable separator attached to the back surface of the adhesive layer, the resin coating layer is entirely or partially coated in a single layer. It is a label form characterized by having a multilayer structure in which a plurality of process unit layers are stacked in the thickness direction.

  Here, the entire or part of the resin coating layer forms a multilayer structure, and when a part of the resin coating layer has a multilayer structure, a part other than the multilayer structure is a single coating unit. It consists of a single layer structure with layers. In addition, the multi-layer structure may have the same number of coating unit layers as a whole, or may be a mixture of portions composed of coating unit layers having different numbers of layers.

  In such a configuration, since the resin coating layer has a multi-layer structure, any of the coating unit layers constituting the multi-layer structure may be caused by streaks, cracks, etc. Even if it has, the streaks and the like can be reinforced by stacking other coating unit layers, so that the strength of the resin coating layer is reduced due to the streaks generated in the coating unit layers. Can be suppressed. In order to form a multi-layer structure, it is usually necessary to form each coating unit layer separately separately. For example, each coating unit layer is formed by coating a resin sequentially with different coaters. Form each one. Therefore, even if streaks or cracks occur in a plurality of coating unit layers, they rarely overlap in the thickness direction, so that the coating unit layers can reinforce each other. Thereby, even if streaks or cracks occur in the plurality of coating unit layers, the effect of suppressing the strength reduction of the resin coating layer described above can be exhibited. Therefore, according to this structure, the strength fall of the resin coating layer by generation | occurrence | production of a stripe, a crack, etc. can be suppressed, and desired durability can be exhibited.

  As a label form, there is a configuration in which a half-cut line is formed on the thermal paper depending on the application. In the case of this configuration, a configuration in which a portion of the resin coating layer located on the back side of the half-cut line has at least a multi-layer structure is preferable. This is because the strength reduction of the thermal paper due to the half-cut line can be suppressed by the multilayer structure.

  In the above-described label form of the present invention, the multi-layer structure of the resin coating layer is formed by applying a predetermined heat-soluble resin to the coating unit layer positioned closest to the front side, A configuration is proposed in which the coating unit layer located on the back side of the coating unit layer is formed by applying the same or different type of heat-soluble resin as the most coating unit layer on the front side Is done.

  Here, when the resin coating layer is formed by applying a heat-soluble resin, the heat-soluble resin is usually heated and dissolved for coating. In the above-described conventional configuration, since the resin layer (corresponding to the resin coating layer of the present invention) has a single layer structure, it is necessary to apply a relatively thick film, which acts on the thermal paper during coating. The amount of heat will also increase. For this reason, in such a conventional configuration, there is a possibility that the thermal paper may be discolored by the amount of heat acting upon application of the dissolved heat-soluble resin.

  In this configuration, the resin coating layer is configured by a multilayer structure, and the layer thickness of each coating unit layer can be set relatively thin. Thereby, when forming the coating unit layer of a resin coating layer, the calorie | heat amount which acts by applying the meltable heat-soluble resin can be reduced. And since the calorie | heat amount which acts when forming the coating unit layer which is located in the most front side and nearest to a thermal paper can be reduced, discoloration of a thermal paper can be suppressed. That is, this structure is formed so that discoloration of the thermal paper is suppressed, and can be stably supplied and used as a product for a desired application.

  In addition, as this structure, in order to exhibit the above-mentioned effect more stably, the structure by which the coating unit layer located in the most front side was formed in the whole back side of the peeling layer of a thermal paper is suitable.

  Here, each coating unit layer is preferably formed of the same heat-soluble resin. This is because stable and high productivity is exhibited. Moreover, when each coating unit layer is to be formed of a different type of heat-soluble resin, all of the coating unit layers may be different types, or any one of the coating unit layers may be a different type. It may be.

  As the heat-soluble resin, EVA-based, polyolefin-based, polyamide-based, nylon-based, polyester-based, rubber-based, cellulose-based and the like are preferably used. More specifically, polyolefin, styrene-butadiene-rubber (SBR), styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), and hydrogenation of these (SBR, SIS, SBS). Deformation resins (for example, styrene-ethylene-butylene-styrene), styrene-ethylene-propylene-styrene (SEPS block copolymer), styrene block copolymer, amorphous poly-α-olefin (APAO) and the like are preferably used.

  In the label form of the present invention described above, the most coated unit layer constituting the multilayer structure is formed such that the layer thickness is 5% or more and 20% or less with respect to the thickness of the thermal paper. A configuration is proposed.

  In such a configuration, the layer thickness of the coating unit layer closest to the thermal paper is such that the thermal paper can be further prevented from being discolored by the amount of heat acting on the thermal paper during the above-described coating. Is defined. By setting the layer thickness of this coating unit layer to 20% or less with respect to the thickness of the thermal paper, the amount of heat acting on the thermal paper can be further reduced when the polyolefin heat-soluble resin in the dissolved state is applied, The effect of suppressing discoloration of the thermal paper due to the amount of heat is improved. Moreover, 5% which is the lower limit of the layer thickness of the coating unit layer is a value set from the production stability. Therefore, this structure is stably produced as the thermal paper discoloration is further suppressed.

  In addition, as a layer thickness of the coating unit layer on the most front side, a configuration in which the thickness is 16% or less as compared with the thickness of the thermal paper is preferable. With this configuration, the effect of suppressing discoloration of the thermal paper is further improved.

  In the label form of the present invention described above, a configuration is proposed in which the heat-soluble resin is a polyolefin-based heat-soluble resin. Here, a configuration in which the heat-soluble resin forming all the coating unit layers is a polyolefin-based heat-soluble resin is preferable.

  Since the polyolefin-based heat-soluble resin has a relatively high strength, the strength of the coating unit layer is improved even when a coating unit layer having a relatively thin layer thickness is formed as described above. it can. Therefore, when streaks, cracks, etc. occur in the coating unit layer as described above, the mutual reinforcing action by each coating unit layer is improved, and the strength reduction of the resin coating layer due to the streaks, cracks, etc. is suppressed. The effect of the present invention that it can be further improved. In addition, since the polyolefin-based heat-soluble resin is excellent in handling at the time of coating, it also has an advantage that a plurality of coating unit layers can be formed stably and easily.

  On the other hand, as a manufacturing method for manufacturing the above-described label form of the present invention, the present invention applies a predetermined resin to the back side of the release layer of the thermal paper having the release layer formed on the back side. A resin coating process that forms a work layer, an adhesive coating process that forms an adhesive layer by applying an adhesive on the back side of the resin coating layer, and a peelable separator paper that is attached to the adhesive layer In the method of manufacturing a label form in which the steps are sequentially performed, the resin coating step forms a single-layer coating unit layer by coating a predetermined resin on the entire back surface or part of the release layer of the thermal paper. The unit layer forming process is repeatedly performed a plurality of times to provide a multiple layer forming step in which the entire or part of the resin coating layer is formed by a multilayer structure in which a plurality of coating unit layers are stacked in the thickness direction. Of label forms characterized by It is.

  In such a manufacturing method, each coating unit layer having a multi-layer structure is formed by each unit layer forming process. Even if the process unit layer is formed, the streaks and cracks can be reinforced by the coating unit layer stacked in the other unit layer forming process. Therefore, as a whole of the resin coating layer, a decrease in strength due to the streaks and cracks can be suppressed, and a label form capable of exhibiting desired durability can be manufactured. Therefore, according to the manufacturing method of the present invention, the above-described label form of the present invention can be stably manufactured, and stable productivity can be exhibited. And the manufacturing method of the label form of this invention can be used suitably as a method of manufacturing the above-mentioned label form of this invention.

  In the manufacturing method of the label form of the present invention described above, the multiple layer forming step of the resin coating step is performed by applying a heat-soluble resin to the entire back surface of the release layer of the thermal paper and coating the most front side. Execute the first unit layer formation process to form the unit layer with a predetermined layer thickness, and then apply the same or different kind of heat-soluble resin as the first heat-soluble resin to form the coated unit layer A method is proposed in which the unit layer forming process is repeatedly executed once or a plurality of times.

  Furthermore, the first unit layer forming process constituting the multiple layer forming process of the resin coating process is such that the layer thickness of the most coated unit layer is 5% or more and 20% or less with respect to the thickness of the thermal paper. A method is proposed in which a heat-soluble resin is applied.

  According to these production methods, the above-described label form of the present invention having a coating unit layer formed of a heat-soluble resin can be produced. And as above-mentioned, it can suppress that a thermal paper discolors with the calorie | heat amount at the time of coating a heat-soluble resin in a unit layer formation process. This effect is further improved by setting the layer thickness of the coating unit layer closest to the thermal paper within the above range with respect to the thickness of the thermal paper. Therefore, the label form of the present invention in which the coating unit layer is formed from the above-described heat-soluble resin can be stably produced.

  Moreover, in the manufacturing method of the label form of this invention mentioned above, the method whose heat-soluble resin is a polyolefin-type heat-soluble resin is proposed. According to this manufacturing method, since the coating unit layer having a relatively high strength can be formed as described above, it is possible to manufacture a label form including a resin coating layer in which the strength reduction due to the streaks or cracks is further suppressed. Here, a method in which the heat-soluble resin applied to form all the coating unit layers is a polyolefin-based heat-soluble resin is preferable.

  As described above, the label form of the present invention has a structure in which the whole or a part of the resin coating layer has a multi-layer structure in which a plurality of coating unit layers are stacked. Even if the coating unit layer has streaks or cracks produced during its production, it can be reinforced by other coating unit layers, so that the strength reduction of the resin coating layer due to the streaks or the like is suppressed and desired. The durability of can be demonstrated. In the case where the outermost coating unit layer is formed by application of a heat-soluble resin and is further formed in a layer thickness of 5% or more and 20% or less with respect to the thickness of the thermal paper. Since the discoloration of the thermal paper is suppressed, it can be stably supplied and used as a product for a desired application.

  In the method for producing a label form of the present invention, as described above, the resin coating process for forming the resin coating layer is performed by applying a predetermined resin to the entire back surface or a part of the release layer of the thermal paper. Since the unit layer forming process for forming the unitary coating unit layer includes a multiple layer forming process in which the unit layer forming process is repeatedly performed a plurality of times, it is assumed that any unit layer forming process is performed by adhering dust or the like. Even if a streak or a crack occurs in the process unit layer, it can be reinforced by the application unit layer formed in the other unit layer formation process, so that a decrease in the strength of the resin coating layer due to the streak or the like can be suppressed. Therefore, according to this manufacturing method, the above-described label form of the present invention capable of exhibiting desired durability can be stably manufactured. In addition, the heat-soluble resin is added so that the thickness of the coating unit layer is 5% or more and 20% or less with respect to the thickness of the thermal paper by the unit forming process for forming the most front side coating unit layer. In the case of coating, it is highly effective to suppress the thermal paper from being discolored by the amount of heat acting during the coating, and a label form having desired durability can be manufactured stably.

It is an expansion longitudinal cross-sectional view of the label form 1 concerning this invention. It is explanatory drawing which shows the manufacturing process of the label form. It is a graph which shows the experimental result which measured the color development sensitivity of the thermal paper by the coating of polyolefin-type heat-soluble resin. It is an expansion longitudinal cross-sectional view of the label form 51 of the other example 1 concerning this invention. It is an expansion longitudinal cross-sectional view of the label form 61 of the other example 2 concerning this invention. It is an expanded longitudinal cross-sectional view of the label form 71 of the another example 3 concerning this invention. It is an enlarged vertical sectional view of a label form t having a conventional configuration.

Embodiments according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows an enlarged longitudinal sectional view of a label form 1 of the present embodiment. The label form 1 has a configuration in which a thermal paper 2, a resin coating layer 5, an adhesive layer 6, and a separator 7 are stacked in the thickness direction. The thermal paper 2 includes a substantially rectangular thermal substrate 3 and a release layer 4 formed on the entire back surface of the thermal substrate 3. A resin coating layer 5 is formed on the back surface of the thermal paper 2 so as to cover the entire peeling layer 4, and the resin coating layer 5 is covered on the back surface of the resin coating layer 5. An adhesive layer 6 is formed on the surface. Further, a separator 7 is attached to the adhesive layer 6. The separator 7 includes a mount 8 having substantially the same size and shape as the heat-sensitive substrate 3 and a release layer 9 formed in a thin film on the entire surface of the mount 8, and the release layer 9 faces the adhesive layer 6. To be pasted. Therefore, the separator 7 can be peeled from the adhesive layer 6 relatively easily.

  Such a label form 1 is used for a delivery slip or the like. An information entry field for writing information such as a delivery destination is printed on the surface of the thermal paper 2 and a half-cut line 19 is formed so as to surround a part of the thermal paper 2. Is formed. The half-cut line 19 is formed on the thermal paper 2, and a portion surrounded by the half-cut line 19 is a receipt. When the delivery slip of this label form 1 is used, the separator 7 is removed from the information entry field on the surface of the thermal paper 2 and the adhesive layer 6 is removed. Affix to the product. Then, the receipt of the thermal paper 2 is cut out by the half-cut line 19 at the delivery destination of this product.

  The resin coating layer 5 constituting the label form 1 has a multilayer structure in which a plurality of coating unit layers 11a and 11b are laminated in the thickness direction. In this embodiment, the two coating unit layers 11a and 11b are formed so as to cover the entire back surface of the thermal paper 2, and the entire resin coating layer 5 has a multilayer structure. Here, the coating unit layer 11a on the front side is in direct contact with the release layer 4 of the thermal paper 2, and the coating unit layer 11b on the back side is in direct contact with the adhesive layer 6. Both coating unit layers 11a and 11b are formed of the same polyolefin-based heat-soluble resin.

  Here, for the coating unit layers 11a and 11b, a heat-soluble resin other than the polyolefin-based heat-soluble resin can also be used. For example, EVA, polyamide, nylon, polyester, rubber, cellulose A system or the like is used. Examples of such heat-soluble resins include polyolefins, styrene-butadiene-rubber (SBR), styrene-isoprene-styrene block copolymers (SIS), styrene-butadiene-styrene block copolymers (SBS), and (SBR, SIS, SBS). Any one of hydrogenated deformation resin (for example, styrene-ethylene-butylene-styrene), styrene-ethylene-propylene-styrene (SEPS block copolymer), styrene block copolymer, amorphous poly-α-olefin (APAO) is preferably used Can be used.

  Moreover, the resin coating layer 5 is formed so that the coating unit layer 11a on the front side is thinner than the coating unit layer 11b on the back side. And the layer thickness of the coating unit layer 11a on the front side is set to be 5% to 20% of the thickness of the thermal paper 2 described above. For example, the thickness of the thermal paper 2 can be set to about 100 μm, the thickness of the front-side coating unit layer 11 a can be set to about 10 μm, and the thickness of the back-side coating unit layer 11 b can be set to about 30 μm. Here, the thickness of the pressure-sensitive adhesive layer 6 can be set to about 5 μm to 50 μm, and the thickness of the separator 7 can be set to about 25 μm to 150 μm.

Next, the manufacturing process of such a label form 1 will be described.
A paper feed roll 21 is prepared in which a long sheet-like thermal paper 2 having a predetermined release agent applied to the entire back surface of the thermal base material 3 is wound into a roll. Here, the thermal paper 2 is wound in a roll shape so that the release layer 4 is positioned on the outer surface side of the paper feed roll 21. The paper feed roll 21 is arranged to freely rotate, the thermal paper 2 is pulled out from the paper feed roll 21, and the coating unit layer 11a, the coating unit layer 11b, and the adhesive layer 6 are sequentially formed on the release layer 4. Further, a separator 7 is attached. In this way, a label form 1 is formed.

  That is, as shown in FIG. 2, the thermal paper 2 is pulled out from the paper supply roll 21 at a predetermined speed, and the thermal paper 2 is continuously transferred to a first guide roller 23 provided to be freely rotatable. When the thermal paper 2 passes through the first guide roller 23, the thermal base material 3 contacts the outer surface of the first guide roller 23 and moves so as to follow the outer surface. While passing through the first guide roller 23, a polyolefin-based binding resin is applied onto the release layer 4 exposed to the outside by the coater 24. The coater 24 coats the polyolefin heat-soluble resin almost uniformly on the entire release layer 4. Thereby, the coating unit layer 11 a on the front side is formed on the release layer 4 of the thermal paper 2. Here, the coating amount of the polyolefin-based heat-soluble resin applied by the coater 24 is set according to the moving speed of the thermal paper 2, and the layer thickness of the coating unit layer 11a on the front side is about 10 μm. It has been adjusted to be. Thus, the first unit layer forming process according to the present invention is realized by the first guide roller 23 and the coater 24 that form the front-side coated unit layer 11a.

  Next to the first guide roller 23, the first intermediate paper body 15a on which the coating unit layer 11a is formed by passing through the first guide roller 23 is continuously connected to the second guide roller 25 provided to be freely rotatable. Transport. Also when passing through the second guide roller 25, the heat-sensitive substrate 3 is moved so as to be in contact with the outer surface of the second guide roller 25, and on the front-side coating unit layer 11a exposed to the outside. The same polyolefin-based heat-soluble resin is applied by the coater 26. By this coater 26, the polyolefin-based heat-soluble resin is applied almost uniformly on the entire coating unit layer 11a. Thereby, the coating unit layer 11b on the back side is formed on the coating unit layer 11a on the front side of the thermal paper 2. Here, the coating amount of the polyolefin-based heat-soluble resin by the coater 26 is set, and the thickness of the coating unit layer 11b on the back side is adjusted to be about 30 μm. Thus, the unit layer forming process according to the present invention is realized by the second guide roller 25 and the coater 26 that form the coating unit layer 11b on the back side.

  The resin coating layer 5 having a multi-layer structure composed of the front-side coating unit layer 11a and the back-side coating unit layer 11b is formed by these two unit layer formation processes. In the present embodiment, the first unit layer forming process by the first guide roller 23 and the coater 24 and the unit layer forming process by the second guide roller 25 and the coater 26 are used to form the multiple layers according to the present invention. The process is realized. And the resin coating process concerning this invention is implement | achieved only by the said multiple layer formation process.

  Next to the second guide roller 25, the second intermediate paper body 15b on which the resin coating layer 5 is formed by passing through the second guide roller 25 is continuously connected to the third guide roller 27 provided to be freely rotatable. Transport. When passing through the third guide roller 27, the heat-sensitive substrate 3 is moved so as to contact the outer surface of the third guide roller 27, and on the coating unit layer 11b on the back side exposed to the outside, A predetermined pressure-sensitive adhesive is applied by the coater 28. With this coater 28, the pressure-sensitive adhesive is applied almost uniformly to the entire coating unit layer 11b. Thereby, the adhesion layer 6 is formed on the coating unit layer 11b on the back side. Here, the coating amount of the pressure-sensitive adhesive is set so that the thickness of the pressure-sensitive adhesive layer becomes a desired thickness. Thus, the pressure-sensitive adhesive coating process according to the present invention is realized by the third guide roller 27 and the coater 28 that form the pressure-sensitive adhesive layer 6.

  Next to the third guide roller 27, the third intermediate paper body 15c on which the adhesive layer 6 is formed by passing through the third guide roller 27 is continuously transferred to the pair of upper and lower pressing rollers 29, 29. Here, the separator 7 is superposed on the adhesive layer 6 of the third intermediate paper body 15c, and the both are pasted by a pair of upper and lower pressing rollers 29, 29. The separator 7 is formed by applying a release agent in a thin film shape on one side of a long sheet-like mount 8 to form a release layer 9 and is wound in a roll shape. And it is pulled out from the state wound by the roll shape at the same speed as the above-mentioned pulling-out speed of the thermal paper 2, and is transferred to the pressing rollers 29, 29 so that the peeling layer 9 faces the adhesive layer 6. Is done. By laminating the separator 7 in this way, a laminated structure of the label form 1 is formed. In addition, the sticking process concerning this invention is implement | achieved by the upper and lower pair of press rollers 29 and 29 which stick the separator 7. FIG.

  Thereafter, a half-cut line 19 is formed on the thermal paper 2, and a half-cut line is also formed on the separator 7. And the desired label form 1 is obtained by cut | disconnecting in the substantially rectangular shape of a predetermined dimension.

  According to the manufacturing method of the present embodiment described above, the resin coating layer 5 is formed by a multilayer structure composed of two coating unit layers 11a and 11b. Even if dust or the like adheres to (25) or the coater 24 (26) and the coating unit layer 11a (11b) has streaks or cracks, it can be reinforced by the other coating unit layer 11b (11a). it can. Therefore, strength reduction due to the streaks or cracks can be suppressed. Also, even if dust or the like adheres to both guide rollers 23 and 25 and coaters 24 and 26 and both coating unit layers 11a and 11b have streaks and cracks, both streaks and cracks are in the same position. Is very rare. For this reason, the coating unit layers 11a and 11b can reinforce the streaks and cracks with each other, and thus can suppress a decrease in strength. Therefore, the label form 1 having desired durability can be stably manufactured. Furthermore, due to the occurrence of streaks and cracks, it is possible to suppress the frequency of performing the work for removing the dust that is the cause, and to suppress the reduction in productivity due to the execution of the work.

  In addition, when forming the coating unit layers 11a and 11b, the polyolefin heat-soluble resin in a melted state is applied by the coaters 24 and 26, so that the polyolefin heat-soluble resin in a dissolved state is coated. The amount of heat acts on the thermal paper 2. In this embodiment, since the layer thickness of the coating unit layer 11a on the front side is set to be relatively thin, about 10 μm (5 μm to 20 μm), the polyolefin-based heat-soluble resin applied to the thermal paper 2 is applied. The amount of work is relatively small, and accordingly, the amount of heat acting on the thermal paper 2 can be suppressed. As a result, when the polyolefin-based heat-soluble resin in a dissolved state is applied to form the front-side coating unit layer 11a, the heat-sensitive substrate 3 of the heat-sensitive paper 2 is discolored (colored) by the amount of heat. This can be suppressed. Therefore, generation | occurrence | production of the malfunction of discoloration of the thermosensitive base material 3 can be suppressed in a manufacturing process, and the fall of productivity accompanying this malfunction can be suppressed. When forming the back side coating unit layer 11b, since the front side coating unit layer 11a has already been formed, it is more heat sensitive than when forming the front side coating unit layer 11a. The amount of heat acting on the heat-sensitive substrate 3 of the paper 2 is suppressed. Therefore, when forming the coating unit layer 11b (lower layer) located on the back side of the most coating unit layer 11a on the front side, the heat-sensitive substrate 3 is not easily discolored, so the coating unit layer 11a on the front side A thicker coating unit layer 11b can be formed.

Here, the experimental result which investigated the relationship between the coating temperature (temperature of a melted state) of polyolefin-type heat-soluble resin and the coloring sensitivity (discoloration) of the thermosensitive base material 3 is demonstrated. This experiment was carried out by preparing a thermal paper with a release layer and measuring the color sensitivity of the thermal paper when a polyolefin-based heat-soluble resin at a predetermined temperature was applied to the release layer side of the thermal paper. It was. Here, a PCS value (Print Contrast Signal) was used as the color development sensitivity. This PCS value is applied as an index representing the contrast perceived by human eyes, and the difference between the maximum reflectance (RL) and the minimum reflectance (RD) is expressed by the following equation (1). It can be obtained by dividing by the maximum reflectance (RL).

PCS value = (RL−RD) / RL × 100 (%) (1)

Here, RL and RD can be measured using a dedicated measuring device, and reflectivity (RL) of a non-colored (non-discolored) part of thermal paper and reflection of a colored (discolored) part. The rate (RD) was measured, and the PCS value was calculated according to the equation (1).

  In this experiment, the thermal paper having a thickness of about 80 μm (the thickness of the release layer is about 0.1 μm to 0.4 μm) was used. Further, since the polyolefin-based heat-soluble resin has a softening point of 110 ° C. to 160 ° C., the coating temperatures of the polyolefin-based heat-soluble resin were examined at 110 ° C., 140 ° C., and 160 ° C. Moreover, the thickness (coating thickness) applied with the polyolefin-based heat-soluble resin was set every 5 μm from 5 μm to 25 μm. In the case where the thickness is smaller than 5 μm, the thickness tends to be difficult to be stably formed.

  The result of the experiment described above is shown in FIG. As a result, the color development sensitivity (PCS value) tends to increase as the coating thickness increases at any coating temperature. And in the range whose coating thickness is 15 micrometers or less, even if it was any coating temperature, it has confirmed that the favorable color development sensitivity was shown. Thereby, it turns out that discoloration of a thermal paper can be suppressed when coating thickness is thinner than 20 micrometers. Therefore, the coating thickness of the polyolefin-based heat-soluble resin was set to 20% or less with respect to the thickness of the thermal paper. Further, as described above, when the coating thickness is thin, it becomes difficult to form stably, so 5% is set as the lower limit with respect to the thickness of the thermal paper.

  Based on such experimental results, the layer thickness of the outermost coating unit layer of the polyolefin-based heat-soluble resin according to the present invention is set to 5% or more and 20% or less with respect to the thickness of the thermal paper. It is stipulated in. In this example, the thickness of the coating unit layer 11a on the front side is about 10 μm (about 10% with respect to the thickness of the thermal paper). Therefore, when the polyolefin heat-soluble resin is applied (the first unit) Layer formation process), the thermal base material 3 of the thermal paper 2 can be sufficiently prevented from being discolored.

  The label form 1 of the present embodiment manufactured by the above-described manufacturing method can exhibit desired durability and strength even if streaks or cracks occur in the coating unit layers 11a and 11b during the manufacturing. Furthermore, it can suppress that the thermal paper 2 discolors in the case of manufacture. Therefore, the label form 1 of the present embodiment can be suitably used as the delivery slip described above.

  In the configuration and manufacturing method of the above-described embodiment, the coating unit layer 11a on the front side of the resin coating layer 5 is about 10% with respect to the thickness of the heat-sensitive substrate 3 with the layer thickness being about 10 μm. However, the layer thickness of the coating unit layer 11 a on the front side can be appropriately set within a range of 5% to 20% with respect to the thickness of the heat-sensitive substrate 3. If it exists in this range, it can suppress that the thermosensitive base material 3 discolors in the case of manufacture.

  Moreover, although the structure of the Example mentioned above comprised the resin coating layer 5 by the two coating unit layers 11a and 11b, the resin coating layer was comprised by the coating unit layer of three or more layers. It is good as a thing. For example, as shown in FIG. 4, the label form 51 of another example 1 may be configured to include a resin coating layer 55 including three coating unit layers 56 a, 56 b, and 56 c. Even in the configuration of this another example, the coating unit layer 56a arranged on the most front side (most thermal paper 2 side) has a layer thickness in the range of 5% to 20% with respect to the thickness of the thermal base material 3. Set in. Thereby, when applying the coating unit layer 56a on the most front side (first unit layer forming process), it is possible to suppress the heat-sensitive substrate 3 from being discolored by the heat amount of the polyolefin-based heat-soluble resin. The other two coating unit layers 56b and 56c are preferably configured such that the layer thickness of these two layers is thicker than the layer thickness of the frontmost coating unit layer 56a. For example, the layer thickness for two layers can be set to be substantially the same as the layer thickness of the coating unit layer 11b on the back side of the above-described embodiment. Further, the configuration of this alternative example 1 is in the manufacturing process of the above-described embodiment, and the unit layer forming process is performed between the second guide roller 25 and the third guide roller 27 so that the unit layer forming process can be executed three times continuously. In addition, it can be realized by installing a new guide roller and a coater and executing the unit layer forming process. According to such a manufacturing process, even if a streak or a crack occurs in any of the three coating unit layers 56a to 56c, they can be reinforced with each other, so that a decrease in strength due to a streak or the like can be suppressed. From the above, even in the label form 51 having the configuration including the three coating unit layers 56a to 56c, the same effects as the above-described embodiment can be exhibited. That is, even in a label form provided with a resin coating layer composed of three or more coating unit layers, the same effects as those of the above-described embodiments can be obtained. In addition, in the manufacturing process of this alternative example 1, a multilayer formation process is realized by three unit layer formation processes, and this multilayer formation process is a resin coating process.

  Moreover, although the structure of the Example mentioned above is the two coating unit layers 11a and 11b which comprise the resin coating layer 5, it is formed in the whole back surface of the thermal paper 2, A some coating unit layer Can be configured to be partially formed in a predetermined portion on the back surface of the thermal paper 2. For example, as shown in FIG. 5, as a label form 61 of another example 2, a coating unit layer 66a is partially formed only on the lower part of the half-cut line 19 formed on the thermal paper 2, and the lower side thereof. The coating unit layer 66b is formed on the entire back side of the thermal paper 2. This configuration includes a resin coating layer 65 in which a portion having a multilayer structure composed of two coating unit layers 66a and 66b and a portion having a single layer structure composed of one coating unit layer 66b are mixed. It is. According to the configuration of the another example 2, the strength reduction of the thermal paper 2 due to the half-cut line 19 can be reinforced by the two coating unit layers 66a and 66b. Further, since the first coating unit layer 66a is partially formed, there is an advantage that an increase in cost required to form a plurality of coating unit layers can be suppressed. In the label form 61 of this different example 2, since the back side coating unit layer 66b constitutes both a multi-layer structure and a single layer structure as described above, the back side coating unit layer 66b. The step of forming a layer realizes both a multilayer formation step and a single layer formation step of forming a single layer structure. That is, in the manufacturing method of the label form 61 of the second example, the resin coating process is realized by a multiple layer forming process and a single layer forming process.

  Furthermore, as in the label form 71 of the third example of FIG. 6, the most front side coating unit layer 76 a is formed on the entire back surface of the thermal paper 2, and the next coating unit layer 76 b is formed below the half-cut line 19. Alternatively, the coating unit layer 76c on the back side may be formed on the entire back side of the thermal paper 2. In this configuration, the resin coating layer 75 in which a portion having a multilayer structure composed of three layers of coating unit layers 76a to 76c and a portion having a multilayer structure composed of two layers of coating unit layers 76a and 76c is mixed. It will be prepared. According to the configuration of the another example 3, the effect of suppressing the strength reduction of the thermal paper 2 due to the formation of the half-cut line 19 is exhibited, and the discoloration of the thermal base material 3 due to the most front side coating unit layer 76a is suppressed. The effect can also be demonstrated.

  In this invention, it is not limited to the Example mentioned above, About the structure other than the above-mentioned Example, it can change and implement suitably within the range of the meaning of this invention.

1, 51, 61, 71 Form label 3 Thermal paper 4 Release layer 5, 55, 65, 75 Resin coating layer 6 Adhesive layer 7 Separator 11a, 11b, 56a-56c, 66a, 66b, 76a-76c Coating unit layer

Claims (4)

A resin coating step of forming a resin coating layer by coating a predetermined resin on the back surface side of the release layer of the thermal paper having a release layer formed on the back surface;
On the back side of the resin coating layer, an adhesive coating process for forming an adhesive layer by applying an adhesive,
In the manufacturing method of the label form that sequentially executes the pasting step of attaching the peelable separator paper to the adhesive layer,
In the resin coating process, a unit layer forming process of forming a single-layer coating unit layer by coating a predetermined resin on the entire back surface or a part of the release layer of the thermal paper is repeatedly performed a plurality of times. Manufacturing a label form characterized by comprising a multiple layer forming step in which a resin coating layer is entirely or partially formed by a multilayer structure in which a plurality of coating unit layers are stacked in the thickness direction. Method. The multi-layer forming process of the resin coating process is the first unit layer in which the heat-soluble resin is applied to the entire back surface of the release layer of the thermal paper, and the coating unit layer located on the front side is formed with a predetermined layer thickness. Execute the formation process, and then repeat the unit layer formation process one or more times by applying the same or different kind of heat-soluble resin as the first heat-soluble resin to form the coating unit layer The method for producing a label form according to claim 1 , wherein: The first unit layer forming process constituting the multiple layer forming process of the resin coating process is performed so that the layer thickness of the most coated unit layer is 5% or more and 20% or less with respect to the thickness of the thermal paper. 3. A method for producing a label form according to claim 2 , wherein a soluble resin is applied. The method for producing a label form according to claim 2 or 3 , wherein the heat-soluble resin is a polyolefin-based heat-soluble resin.

Images