JP2550767Y2 - Labels for drum can management - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label for managing a drum can attached to the surface of a drum.

[0002]

2. Description of the Related Art When a manufacturer of a drug or the like ships a drug to a customer after filling the drum or the like with a drug or the like,
Information such as the type of packing in the drum, the shipping date, the manufacturer's name, and precautions can be written directly on the surface of the drum with paint, or a paper label with these items printed on the surface of the drum can. Or stick it on.

[0003] After a customer has consumed the filling in a drum, ie, after several months to two years have passed since shipment, the drum is usually collected by a collection company, washed and reused. It is.

[0004]

In the above-described device in which information is written on the surface of the drum with paint or the like, the description can be completely erased in a step of sandblasting the outer surface of the drum for reuse. However, there are drawbacks in that not only the operation of writing various items on the surface of the drum can with paint or the like is complicated, but also in the case of performing management using bar codes, bar codes cannot be written with paint.

[0005] Further, a paper label on which information is described by printing or the like is stuck on the surface of a drum can, in order to impart water resistance to the paper label in consideration of the use condition of the drum.
A transparent plastic film must be further adhered to the surface of the paper label to make the paper label water-resistant, which is troublesome.

[0006] Further, in the case of sticking a paper label on the surface of a drum can, the product is shipped from a manufacturer of chemicals and the like to the customer, and furthermore, after the filling is consumed by the customer and the drum is collected, the summer and winter seasons are repeated. The paper label is adhered to the surface of the drum with a strong adhesive force so that the paper label does not peel off from the surface of the drum even in the case of unloading or in the severe situation where the filling is used. .

For this reason, when reusing a drum can, the end of the paper label stuck to the collected drum can is caused by a spatula or a solvent, and then the label is peeled off. Not only the operation itself is complicated, but also the phenomenon of paper breakage during the peeling of the label or the occurrence of so-called glue residue that the adhesive remains on the surface of the drum can causes the operation for peeling the paper label. It's more complicated.

On the other hand, in the present invention, it is not necessary to attach a transparent plastic film for imparting water resistance,
In addition, a label for drum can management that can be easily peeled off due to shrinkage due to heat during washing and drying steps for reusing the drum can and that can be easily peeled off without leaving glue residue on the surface of the drum can. provide.

[0009]

SUMMARY OF THE INVENTION The above-mentioned object is achieved by the label for managing a drum according to the present invention having the following structure. In other words, the present invention provides a label base made of a heat-shrinkable synthetic paper having a vertical and horizontal heat shrinkage (%) of 1.0 to 16.0, respectively, and is laminated on one surface of the label base. A pressure-sensitive adhesive layer, and a label for drum can management having a release paper covering the pressure-sensitive adhesive layer, the label is attached to the surface of the drum and aging is performed,
Further, the pressure-sensitive adhesive layer after heat treatment has a 180-degree peel adhesive strength of 200 to 400 g / 40 mm in width and is composed of a label for drum can management.

In the label for managing drums according to the present invention having the above-described structure, the label substrate made of heat-shrinkable synthetic paper is placed in an oven at 150 ° C. for 10 minutes.
Minutes after horizontally left in a free state, the thermal shrinkage rate upon cooling at room temperature and removed from the oven (%), i.e., the length of the heating front of the article (width) and A ^1, article after heating length (width) is taken as a ^2, {(a ¹ -A
² ) The heat shrinkage (%) expressed by × 100 ° / A ¹
In each of the length direction and the width direction of the synthetic paper,
It must be within the range of 0 to 16.0.

In addition, the label for drum can management of the present invention is:
The label is adhered to the surface of the drum, that is, the release paper is removed from the label, the adhesive layer is adhered to the surface of the drum, and this is subjected to aging, and further subjected to heat treatment. 180-degree peel adhesion is 200 to 400 g /
It needs to be 40 mm wide.

Here, the aging condition is 20
g / cm ² under a load of 40 ° C. in an atmosphere for 24 hours.
Perform at 0 ° C. for 10 minutes.

The label substrate made of the heat-shrinkable synthetic paper of the present invention, an adhesive layer laminated on one surface of the label substrate, and a release paper covering the adhesive layer Is generally obtained by laminating a sheet having an adhesive layer formed on a release surface of release paper on one surface of a label substrate using the adhesive layer of the sheet. Can be

In the label for drum can management according to the present invention having the above-described structure, the heat-shrinkable synthetic paper used as the label base material is mainly made of polypropylene resin.
A synthetic paper obtained by melting and kneading a composition in which an inorganic filler and a small amount of additives are blended, extruding through a die slit of an extruder, forming a film, and then stretching the film is preferred.

The synthetic paper produced by the internal paper-forming method has three layers: a base layer stretched and oriented in the vertical and horizontal directions, and a paper-like layer stretched and oriented only in the horizontal direction existing above and below the base layer. A large number of microvoids are formed inside the paper-like layer, and the presence of the microvoids causes white opaque,
In addition, printability and writability are obtained, and mechanical strength is provided by the base layer.

When the thickness of the label base made of heat-shrinkable synthetic paper exceeds 130 μm, the end of the label adhered to the drum can easily peels off, and when the thickness is less than 60 μm, the strength becomes insufficient. . For this reason, as a label substrate, about 60 to 130μ, most preferably 70 to 90μ
Use the one of about the thickness.

An adhesive layer is laminated on one surface of the label substrate, and the other surface (non-laminated surface of the adhesive layer) is provided on the other surface of the label substrate for imparting easy writing properties. A coating layer may be formed.

As described above, the label for drum management according to the present invention has the label attached to the surface of the drum, that is, the release paper is removed from the label, and the adhesive layer is attached to the surface of the drum. Aging for 24 hours under a load of 20 g / cm ² in an atmosphere of 150 ° C.
18 of the pressure-sensitive adhesive layer after heat treatment for 10 minutes at
0 degree peeling adhesive strength is in the range of 200 to 400 g / 40 mm width. At this time, the pressure-sensitive adhesive layer 18
The 0-degree peel adhesion is a value obtained by measuring the peel adhesion immediately after heat treatment at 150 ° C. for 10 minutes in an atmosphere of 23 ° C. and 65% RH. 23 ° C, 65% immediately without returning to room temperature
It is a numerical value measured in an atmosphere of RH.

Before measuring the peel adhesion immediately after the heat treatment at 150 ° C. for 10 minutes, the measurement sample was placed in a 40 ° C. atmosphere under a load of 20 g / cm ² . Aging for 24 hours is the same as when temporarily attaching a label for drum management to the drum surface,
This means that the label is securely attached to the surface of the drum can by pressing, instead of simply pressing it down or applying it with little pressure.

A label was stuck on the surface of a drum can, aged under a load of 20 g / cm ² for 24 hours, and further subjected to a heat treatment at 150 ° C. for 10 minutes. 200 to 40 peel adhesion
The width of 0 g / 40 mm means that the label does not fall off the surface of the drum in the step of washing and drying the recovered drum, and after the washing and drying steps,
It is a requirement that the label can be easily peeled off from the surface of the drum.

That is, when the recovered drum can is dried after being washed, it is heated at about 130 to 150 ° C.
After performing aging for 24 hours under a load of 20 g / cm ^{2 in} an atmosphere of 0 ° C., and further performing a heat treatment at 150 ° C. for 10 minutes, the 180 ° peel adhesive strength of the pressure-sensitive adhesive layer becomes 200. The requirement for a width of ~ 400 g / 40 mm is that the label does not fall off in a heating and drying oven during the drying step by heating, and further, the label shrinks sufficiently due to the properties of the label base material. It is a requirement that the label will be slightly lifted up against the heat shrinkage of the base material and that the adhesive will not remain on the surface of the drum in the label peeling process due to the sufficient heat cohesion of the adhesive layer. .

That is, after the label is attached to the surface of the drum, aging is performed for 24 hours in a 40 ° C. atmosphere under a load of 20 g / cm ² , and further at 150 ° C. for 1 hour.
180 minutes of the pressure-sensitive adhesive layer when heat treatment was performed for 0 minutes.
If the peel adhesion is less than 200 g / 40 mm width, there is a risk that the label may fall off in a heating / drying oven in a washing / drying process for reusing the collected drums and ignite. On the other hand, if the 180-degree peel adhesion exceeds 400 g / 40 mm width, the peeling property when peeling the label from the surface of the drum after the washing and drying steps for reusing the recovered drum can deteriorates.

The label for managing a drum can of the present invention preferably further satisfies the following requirements.

The label is attached to the surface of the drum,
24 g under a load of 20 g / cm ^{2 in} an atmosphere of 40 ° C.
18 of the pressure-sensitive adhesive layer when aged for a while
The 0-degree peel adhesion is 1000 g / 40 mm width or more.

The label is attached to the surface of a drum,
24 g under a load of 20 g / cm ^{2 in} an atmosphere of 40 ° C.
After 180 hours of aging, the pressure-sensitive adhesive layer has a 180 ° peel adhesive strength of 600 g / 40 mm or more when further heat-treated at 80 ° C. for 10 minutes.

The above and requirements are that a manufacturer, such as a drug, fills a drum into a product, ships it to a customer, and, in the summer, winter, between the consumption of the filling and the collection of the drum after the customer consumes the filling. It is a requirement that the label does not fall off the surface of the drum can under the condition of unloading or severe conditions at the site where the packing is used.

The 180 ° peel adhesive strength of the pressure-sensitive adhesive layer of the label to the drum surface was 23 ° C.
The value is a value measured in an atmosphere of 65% RH at 23 ° C. without returning the sample subjected to aging or heat treatment to normal temperature without returning to normal temperature.

A pressure-sensitive adhesive layer satisfying these requirements can be formed, for example, by using a pressure-sensitive adhesive made of an acrylic resin adjusted with a crosslinking agent. The pressure-sensitive adhesive layer made of the acrylic resin adjusted with the cross-linking agent has sufficient heat-resistant cohesive force, so that the recovered drum can is washed and reused after reuse in the drying process. Even if the label is peeled off under a heated condition, the adhesive does not remain on the surface of the drum.

Prior to laminating the pressure-sensitive adhesive layer on one side of the label substrate, it is preferable that the laminating surface of the pressure-sensitive adhesive layer on the label substrate is previously treated with a primer.

As the release paper for covering the pressure-sensitive adhesive layer, for example, a release paper having a general release layer obtained by applying a silicone-based release agent to polylamine paper or glassine paper can be used.

[0031]

The label for drum can management according to the present invention includes a label base made of heat-shrinkable synthetic paper having a vertical and horizontal heat shrinkage (%) of 1.0 to 16.0, respectively. A label for managing a drum having an adhesive layer laminated on one surface of a material and a release paper covering the adhesive layer, the label being attached to the surface of the drum, After aging for 24 hours under a load of 20 g / cm ² in an atmosphere at a temperature of 150 ° C., and further performing a heat treatment at 150 ° C. for 10 minutes, the 180 ° peel adhesive strength of the pressure-sensitive adhesive layer becomes 200.
４００400 g / 40 mm width.

Since the label for managing drums according to the present invention having the above-described structure uses synthetic paper as the label base material, information such as a bar code is directly recorded on the label base material by printing or the like. Since the label substrate itself has excellent water resistance, there is no need to adhere a transparent plastic film to make the label water resistant.

The label for drum management according to the present invention is as follows:
The heat treatment when washing and drying the drums collected after the contents inside the drums have been consumed, the labels slightly rise due to the heat shrinkage of the label base material, and sufficient heat-resistant aggregation on the adhesive layer Because of the strength, the label can be peeled off very easily, and the adhesive does not remain on the surface of the drum can due to the peeling of the label.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific structure of the drum management label according to the present invention will be described below based on a production example.

Example 1 In FIG. 1, a silicone release agent (KS772: Shin-Etsu Chemical Co., Ltd.) was added to 82 g / m ² blue glassine paper.
By applying at a rate of 0 g / m ² , a release paper 4 having a release layer was obtained.

Subsequently, 1% of the pressure-sensitive adhesive (BPS 3197-1: Toyo Ink Mfg. Co., Ltd.) of an acrylic resin having a solid content of 50% by weight was applied to the release layer surface of the release paper 4 with the silicone release agent. % Of an isocyanate-based crosslinking agent added using a Mayer bar.
(Dry) / m ^2, and dried at 80 ° C. for 2 minutes to form an adhesive layer 3.

Thereafter, the heat-shrinkable synthetic paper having a thickness of 80 μm (Yupo SGU # 80:
By laminating a label substrate 2 made of Oji Yuka Synthetic Paper Co., Ltd.), a label 1 for drum can management, which is an example of the present invention, was obtained.

Example 2 A silicone release agent (K) was applied to 82 g / m ² of blue glassine paper.
S772: Shin-Etsu Chemical Co., Ltd.) was applied at a rate of 1.0 g / m ² to obtain a release paper having a release layer.

Subsequently, an epoxy-based adhesive (KP1004: Nippon Carbide Co., Ltd.) having a solid content of 50% by weight was used with respect to the release layer surface of the release paper using a silicone release agent. 20 g (dry) /
after application to m ^2, dried for 2 minutes at 80 ° C., to form a pressure-sensitive adhesive layer.

Thereafter, a label base material composed of a heat-shrinkable synthetic paper having a thickness of 80 μm (Yupo KPK # 80: Oji Yuka Synthetic Paper Co., Ltd.) is laminated on the surface of the pressure-sensitive adhesive layer. A label for managing drums, which is another embodiment of the present invention, was obtained.

The synthetic paper used as a label base material for the drum management labels in Examples 1 and 2
Heat shrinkage at ° C., i.e., after the horizontally leave the free state for 10 minutes in the length (width) A ¹ of the label base material in an oven at 0.99 ° C., when cooled at room temperature and removed from the oven when the length of the (width) is a ^2, {(a
Table 1 shows the heat shrinkage (%) at 150 ° C. expressed as ¹ −A ² ) × 100 ° / A ¹ .

[0042]

[Table 1]

The release paper was removed from the drum-management labels of Example 1 and Example 2 and affixed to the surface of the drum-can, and was applied for 24 hours under a load of 20 g / cm ^{2 in} an atmosphere of 40 ° C. 23 ° C, 65% immediately after aging
180 ° peel adhesion of the pressure-sensitive adhesive layer to the surface of the drum in an atmosphere of RH, 23 ° C., 6 ° C. immediately after heat treatment at 80 ° C. for 10 minutes following the aging treatment.
180 ° peel adhesion of the pressure-sensitive adhesive layer to the surface of the drum in an atmosphere of 5% RH, an atmosphere of 23 ° C. and 65% RH immediately after heat treatment at 150 ° C. for 10 minutes following the aging treatment. Table 2 shows the 180-degree peel adhesive strength of the pressure-sensitive adhesive layer to the surface of the drum inside.

The 180 ° peel adhesive strength of the pressure-sensitive adhesive layer is as follows:
According to "8.3 Test method" of JIS Z 0237,
It is a measured value when the material is peeled at a peeling speed of 300 ± 30 mm / min.

[0045]

[Table 2]

COMPARATIVE EXAMPLE 1 In the production process of the label for drum can management of Example 1, a pressure-sensitive adhesive to which an isocyanate-based crosslinking agent was not added was used in forming the pressure-sensitive adhesive layer.
In the same manner as in the corresponding step, a label for drum can management for comparison was obtained.

Comparative Example 2 In the production process of the label for drum can management in Example 1, when forming the pressure-sensitive adhesive layer, an isocyanate-based cross-linking agent added to the pressure-sensitive adhesive at 2% by weight was used. In the same manner as in the corresponding steps of Example 1, a drum management label for comparison was obtained.

Comparative Example 3 In the production process of the label for drum can management in Example 2, when forming the adhesive layer, an adhesive which does not contain an epoxy-based crosslinking agent was used. By the same method as in the process, a label for drum control for comparison was obtained.

Comparative Example 4 In the production process of the label for drum can management in Example 2, when forming the pressure-sensitive adhesive layer, an epoxy-based cross-linking agent to which 2% by weight was added to the pressure-sensitive adhesive was used. In the same manner as in the corresponding steps of Example 2, a drum management label for comparison was obtained.

Comparative Example 5 In the production process of the label for drum can management in Example 2, when forming the pressure-sensitive adhesive layer, an epoxy-based cross-linking agent added at 3% by weight to the pressure-sensitive adhesive was used. In the same manner as in the corresponding steps of Example 2, a drum management label for comparison was obtained.

The release paper was removed from the drum-management labels of Comparative Examples 1 to 5 and attached to the surface of the drum-can, and was applied for 24 hours under a load of 20 g / cm ^{2 in} an atmosphere of 40 ° C. Aging, and then at 150 ° C for 10
Of the pressure-sensitive adhesive layer on the surface of the drum in an atmosphere of 23 ° C. and 65% RH immediately after the heat treatment for 18 minutes.
Each of the 0-degree peel adhesions is shown in [Table 3].

[0052]

[Table 3]

The release paper was removed from the drum-management labels of Examples 1 and 2 and Comparative Examples 1 and 5 and attached to the surface of the drum.
After aged for 24 hours under a load of g / cm ² and further subjected to a heat treatment at 150 ° C. for 10 minutes, the floating state of the label on the surface of the drum can was evaluated in five steps, and the label was removed from the surface of the drum can. The presence or absence of glue residue on the surface of the drum after peeling was observed. The results are shown in [Table 4].

In [Table 4], 1... No lifting of the label, 2... Slight lifting of the label, and the label can be easily peeled off, 3. 4... The entire label is almost floating, 5... The entire label is floating and shrinking.

In the case where the label is lifted up to 3-5, the label can be easily peeled off, but the label falls into the drying oven in the washing and drying process for reusing the collected drums. Includes the risk of fire.

[0056]

[Table 4]

[0057]

[Effect of the Invention] The label for managing drums of the present invention does not require the attachment of a transparent plastic film for imparting water resistance to the label, and furthermore, the drum can be distributed at the distribution stage, and the collected drums are washed and dried. Labels do not peel off from the surface of the drum during the washing and drying process when they are reused for reuse, and after the washing and drying process for reuse, they peel off due to shrinkage due to heat during drying. It can be easily peeled off without causing adhesive residue on the surface of the drum.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a drum management label according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Label for drum can management 2 ... Label base material made of heat-shrinkable synthetic paper 3 ... Adhesive layer 4 ... Release paper

Claims (1)

(57) [Scope of request for utility model registration] 1. A label base made of a heat-shrinkable synthetic paper having a vertical and horizontal heat shrinkage (%) of 1.0 to 16.0, respectively, and laminated on one surface of the label base. A pressure-sensitive adhesive layer, and a label for drum control having a release paper covering the pressure-sensitive adhesive layer, the label is attached to the surface of the drum, aging is performed, after further heat treatment 180-degree peel adhesion of the pressure-sensitive adhesive layer is 200 to 400
g / 40 mm wide label for drum management.