JP2007204113A - Heat-shrinkable cylindrical label, and method for processing heat-shrinkable film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat-shrinkable cylindrical label which is excellent in impact resistance and can be easily parted by utilizing a parting auxiliary line. <P>SOLUTION: The heat-shrinkable cylindrical label is equipped with a cylindrical film 2 at least having circumferential heat-shrinkabilities and the parting auxiliary line 3 having a notch part 6 intermittently formed in the longitudinal direction of this cylindrical film 2. In this heat-shrinkable cylindrical label, for the notch part 6 of the parting auxiliary line 3, the circumferential length is reduced in the thickness direction of the cylindrical film 2, and the notch part 6 is formed by penetrating through the cylindrical film 2 from one face to the other face, and an aperture area in the other face is formed smaller in comparison with the aperture area in one face of the film 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heat-shrinkable cylindrical label on which an auxiliary parting line is formed and a method for processing a heat-shrinkable film.

Conventionally, heat-shrinkable cylindrical labels (also called cylindrical shrinks, shrink films, etc.) are attached to various containers such as beverage containers, food containers, and cosmetic containers.
Usually, in such heat-shrinkable cylindrical labels, perforations are formed as dividing auxiliary lines in order to remove the cylindrical labels from the container.

Conventionally, this type of perforation is one in which linear through-hole portions and non-through-portions extending in the vertical direction are alternately arranged, as described in JP-A-2001-290425, or needle-hole-like through-hole portions. And non-penetrating portions are alternately arranged.
The heat-shrinkable cylindrical label in which such perforations are formed is externally fitted to the container and then contracted in the circumferential direction by heating and is attached to the container. And after using this container with a cylindrical label, a nail etc. is put in the upper edge (or lower edge) of a cylindrical label, and it picks up the upper end part (or lower edge) of a cylindrical label, and follows a perforation. A cutting line is formed. Therefore, the cylindrical label can be divided in the vertical direction and removed from the container.

However, the heat-shrinkable cylindrical label in which the perforation is formed has a problem that the cylindrical label itself is broken from the perforation by an impact.
Specifically, since the heat-shrinkable cylindrical label is greatly heat-shrinked in the circumferential direction at the time of mounting, a tensile force is applied in the circumferential direction. For this reason, when the heat-shrinkable cylindrical label is attached to the container, the perforation having a linear through-hole portion extending in the longitudinal direction becomes an elliptical shape when the through-hole portion is stretched and expanded in the circumferential direction. Open. Moreover, the perforation which has a needle-hole-shaped through-hole part is opened in elliptical shape, when the through-hole part is pulled and expanded in the circumferential direction. When the perforated through-hole part expands in this way, when an impact is applied to the container with a cylindrical label (for example, drop of the container), a crack occurs from the edge of the expanded through-hole part, and the cylindrical label breaks. There is a case. In particular, polyethylene terephthalate containers widely used as beverage containers and the like have been thinned in recent years, so that they are easily deformed by impact, and the heat-shrinkable cylindrical label attached to this type of container is perforated. It tends to break easily from the through-hole portion.
Further, since the perforated through-hole portion is enlarged, the perforated through-hole portion is conspicuous, and there is a problem that the appearance of the cylindrical label is impaired.

JP 2001-290425 A

  Then, this invention makes it a subject to provide the heat-shrinkable cylindrical label which is excellent in impact resistance and can be easily cut | disconnected using a parting auxiliary line. Furthermore, this invention makes it a subject to provide the processing method which processes a parting auxiliary line into a heat-shrinkable film.

  In view of the above problems, the present invention provides a tubular film having heat shrinkability in at least the circumferential direction, and a dividing auxiliary line having a cut portion formed intermittently in the longitudinal direction of the tubular film. The cutting auxiliary line has a circumferential length that is reduced in the thickness direction of the tubular film, and the cut portion is formed to penetrate from one surface of the tubular film to the other surface. And a heat-shrinkable cylindrical label in which the opening area on the other surface is smaller than the opening area on one surface of the film.

In such a heat-shrinkable cylindrical label, the circumferential length of the cut portion of the dividing auxiliary line is smaller in the thickness direction of the tubular film, and the other surface is compared with the opening area on one surface of the film. Since the opening area is small, the through area of the cut portion is small. Since the opening area on the other side of the film is small in this way, even if a tensile force is applied in the circumferential direction during heat shrinkage of the heat-shrinkable cylindrical label, the tensile force on the other side of the film is reduced. Therefore, it is possible to reliably prevent the cut portion from expanding into an elliptical shape.
Therefore, even if an impact is applied to the container equipped with the heat-shrinkable cylindrical label, the cylindrical label is difficult to break. Moreover, since a notch part does not expand at the time of mounting | wearing, the heat-shrinkable cylindrical label which exhibits a beautiful mounting | wearing external appearance can be provided.
Moreover, since the opening part in the one surface of a film is large at a notch part, if a part of cylindrical label is picked and pulled at the time of parting, a tear line will be formed along a notch part. Therefore, the attached cylindrical label can be easily cut and removed by using the auxiliary cutting line having the cut portion.

  Further, the present invention comprises a tubular film having heat shrinkability at least in the circumferential direction, and a dividing auxiliary line having a cut portion formed intermittently in the longitudinal direction of the cylindrical film, the dividing assistance The heat-shrinkable cylindrical label in which the cut portion of the wire has a circumferential length that is smaller in the thickness direction of the tubular film, and the cut portion is formed in a concave shape that does not penetrate the tubular film. I will provide a.

Such a heat-shrinkable cylindrical label has a circumferential length of the cut portion of the auxiliary cutting line that is reduced in the thickness direction of the cylindrical film, and is formed in a concave shape that does not penetrate the cylindrical film. There is no opening on one side. Therefore, when the heat-shrinkable cylindrical label is heat-shrinked, there is no possibility that the cut portion will expand even if a tensile force is applied in the circumferential direction.
Therefore, even if an impact is applied to the container to which the heat-shrinkable cylindrical label is attached, the cylindrical label is not easily broken and has a beautiful mounting appearance because it is a non-penetrating cut portion.
Moreover, the attached cylindrical label can be easily separated and removed by using a dividing auxiliary line having a cut portion.

  Further, according to the second means of the present invention, the rotary blade having a plurality of blade portions projecting at a predetermined interval around the periphery, and the tip of each blade portion of the rotary blade abuts sequentially when the rotary blade rotates. The blade portion is substantially triangular with a pointed tip and has a predetermined thickness in the rotation direction of the rotary blade, and is between the blade portion of the rotary blade and the receiving roll. By supplying the film and rotating the rotary blade, sequentially entering the blade portion of the rotary blade in the direction orthogonal to the main stretching direction of the heat-shrinkable film, and sequentially pressing each blade portion of the rotary blade against the film Provided is a method for processing a heat-shrinkable film, wherein a notch is formed at a predetermined interval in the heat-shrinkable film.

The processing method of the heat-shrinkable film is configured such that the blade portion of the rotary blade comes into contact with the surface of the receiving roll, so that the blade portion does not enter the film greatly. Therefore, the blade can be quickly separated from the film, and as a result, it is possible to prevent the occurrence of pointed marks caused by the tip of the rotating blade portion, and to reliably form a cut portion that matches the outer shape of the blade portion.
Further, since the blade portion has a substantially triangular shape with a pointed tip and has a predetermined thickness in the rotation direction of the rotary blade, the length in the main stretching direction of the heat-shrinkable film is small in the thickness direction of the film. The resulting notch can be formed in a heat shrinkable film.

The heat-shrinkable cylindrical label of the present invention is difficult to break even when an impact is applied to a container equipped with the heat-shrinkable cylindrical label. Therefore, a heat-shrinkable cylindrical label excellent in impact resistance can be provided. In addition, the heat-shrinkable cylindrical label of the present invention has a good appearance when attached to a container, and can be separated and removed using the auxiliary auxiliary line after being attached.
Furthermore, the processing method of this invention can form reliably the notch part suitable for the outer shape of the blade part which penetrates into a heat-shrinkable film in a heat-shrinkable film. Therefore, it is possible to form a cut portion with very little design error in the heat-shrinkable film.

Hereinafter, the present invention will be specifically described with reference to the drawings.
1 and 2, reference numeral 1 denotes a cylindrical film 2 formed by forming a base material into a cylindrical shape, a dividing auxiliary line 3 formed in the longitudinal direction of the cylindrical film 2, and the cylindrical film. The heat-shrinkable cylindrical label provided with the cut | interruption 5 for the division | segmentation starting points formed by cut | disconnecting a part of 2. FIG.

The tubular film 2 may be a conventionally known tubular body that thermally contracts greatly at least in the circumferential direction at a predetermined temperature (for example, 80 to 100 ° C.).
Specifically, the cylindrical film 2 is formed, for example, by forming a heat-shrinkable base material into a cylindrical shape, overlapping the end portions on both sides, and bonding the overlapping portions with a solvent or an adhesive. 21 is formed.
Although the width | variety of the said center seal | sticker 21 is not specifically limited, Usually, about 2-7 mm is illustrated.

  The material constituting the tubular film 2 is not particularly limited as long as it has heat shrinkability in at least the width direction (circumferential direction when formed into a tubular shape, hereinafter the same), for example, 1 type selected from polyester resins such as polyethylene terephthalate, olefin resins such as polypropylene, styrene resins such as polystyrene and styrene-butadiene copolymers, cyclic olefin resins, and thermoplastic resins such as vinyl chloride resins, Or well-known films, such as a synthetic resin film which consists of 2 or more types of mixtures, etc. can be used. A laminated film in which two or more kinds of resins having heat shrinkability are laminated can also be used. Furthermore, the well-known laminated | multilayer film by which heat insulation layers, such as a foamed resin sheet, and another functional layer were laminated | stacked on the film which has heat shrinkability can also be used.

  The heat-shrinkable substrate can be obtained by forming a film by a known production method and performing a stretching treatment. The stretching treatment is usually performed by main stretching at a temperature of about 70 to 110 ° C. at a width of 2.0 to 8.0 times, preferably about 3.0 to 7.0 times. Further, in the longitudinal direction (longitudinal direction when formed into a cylindrical shape, the same applies hereinafter), the stretching process may be performed at a low magnification of, for example, 1.5 times or less. The obtained base material becomes a uniaxially stretched film or a biaxially stretched film slightly stretched in a direction orthogonal to the main stretch direction. Although the thickness of a base material is not specifically limited, The thing of about 30-80 micrometers is used normally.

The heat shrinkage rate of the substrate is not particularly limited as long as it can be adhered to the container by heat shrinkage. Usually, the heat shrinkage rate in the width direction (immersion in 90 ° C. warm water for 10 seconds) is about 40%. The above is preferably exemplified by about 50% or more. Further, the base material may be slightly heat-shrinked in the vertical direction, and the heat shrinkage rate (immersion in 90 ° C. warm water for 10 seconds) in the vertical direction is about −3 to 15%. .
However, heat shrinkage rate (%) = [{(original length in width direction (or longitudinal direction)) − (length after immersion in width direction (or longitudinal direction))} / (width direction (or longitudinal direction) ) Original length)] × 100.

  In addition, although well-known design printings, such as a brand name, a trademark, and a design design, are printed on the base material by a single color or multicolor printing by gravure printing etc., the design printing is not illustrated.

  Next, as shown in FIGS. 1 and 2, the dividing auxiliary line 3 formed on the tubular film 2 includes two dividing auxiliary lines 3 and 3 formed adjacent to each other. The auxiliary cutting lines 3 and 3 are formed on both sides of the center seal 21, respectively. That is, two split auxiliary lines 3 and 3 are formed adjacent to one side of the center seal 21, and two adjacent split auxiliary lines 3 and 3 are similarly formed on the other side of the center seal 21. Is formed. Hereinafter, the two auxiliary auxiliary lines 3 formed on one side of the center seal 21 are referred to as a first auxiliary line 31 and a second auxiliary line 32, and two auxiliary auxiliary lines 3, formed on the other side. 3 is referred to as a third auxiliary line 33 and a fourth auxiliary line 34.

The first to fourth auxiliary lines 31 to 34 have a configuration in which cut portions 6 and non-cut portions 7 are alternately arranged in the longitudinal direction of the tubular film 2. In other words, the first to fourth auxiliary lines 31 to 34 have the cut portions 6 that are formed intermittently at predetermined intervals in the longitudinal direction of the tubular film 2.
Each cut portion 6 is formed by a linear opening obtained by cutting the tubular film 2 in the thickness direction. For example, as shown in FIG. 3 (b), the cut portion 6 of the dividing auxiliary line 3 is opened at the inner surface 2 b of the tubular film 2 so that the circumferential length of the opening opened on the outer surface 2 a of the tubular film 2 is opened. It is formed shorter than the circumferential length of the opening. According to this dividing auxiliary line 3, since the opening area of the outer surface 2a of the cylindrical film 2 becomes small, it is preferable also in appearance.
The cut portions 6 having different opening peripheral lengths on the outer surface 2a and the inner surface 2b include those formed so that the opening area gradually increases in the thickness direction of the tubular film 2 as shown in the figure. For example, the cut portion 6 is formed in a tapered shape in which both end portions in the circumferential direction become gradually smaller in the thickness direction of the tubular film 2, and the longitudinal end portions (upper and lower end portions) of the cut portion 6 are Those formed linearly in the thickness direction of the tubular film are included.

For example, from the point of impact resistance of the tubular label 1, each cut portion 6 has an opening portion in the inner surface 2 b of the tubular film 2 extending in the circumferential direction of the tubular film 2 as shown in FIG. 3. It is formed in a linear shape. In this case, with reference to the inner surface 2b of the tubular film 2, each cut portion 6 has a circumferential length (hereinafter referred to as a circumferential length) longer than a vertical length (hereinafter referred to as a vertical length). Is also formed long. In particular, each cut portion 6 is preferably formed in a linear shape extending in parallel with the main stretching direction (circumferential direction) of the base material constituting the tubular film 2.
As shown in FIG. 3A, the circumferential length 6X and the longitudinal length 6Y of each notch 6 in the inner surface 2b of the tubular film 2 are such that the circumferential length 6X: the longitudinal length 6Y is 1: 5. It is preferably formed at about 5: 1, and more preferably formed at about 1: 2 to 5: 1. Specifically, the circumferential length 6X of the cut portion 6 is, for example, about 0.02 to 1.0 mm, and the vertical length 6Y of the cut portion 6 is, for example, about 0.1 to 0.5 mm. Illustrated. In addition, the formation interval of the upper and lower cut portions 6 (vertical length 7Y of the non-cut portion 7) is inferior in impact resistance if the interval is too narrow, and the separation property of the cylindrical label 1 is deteriorated if it is too wide. It is preferable to be formed to have a thickness of about 0.2 to 3.0 mm.

In addition, each said notch | incision part 6 is formed so that the peripheral length in the inner surface 2b of the cylindrical film 2 is longer than the peripheral length of the opening opened in the outer surface 2a of the cylindrical film 2, On the contrary, even if each notch part 6 is formed so that the circumferential length of the opening opened in the outer surface 2a of the tubular film 2 is longer than the circumferential length of the opening opened in the inner surface 2b of the tubular film 2 Good.
However, it is preferable that the opening of the outer surface 2a of the tubular film 2 (tubular label 1) is formed short because the cut portion 6 is less noticeable in appearance.

The cut portions 6 of the first and second auxiliary lines 31 and 32 are formed at the same height in the vertical direction. The same applies to the cut portions 6 of the third and fourth auxiliary lines 33 and 34.
In addition, the formation position of the notch part 6 of the 1st and 2nd auxiliary lines 31 and 32 is not restricted above, For example, as shown in FIG. The cut portions 6 of the first auxiliary lines 31 and the cut portions 6 of the second auxiliary lines 32 can be formed alternately so that the cut portions 6 of the second auxiliary lines 32 are positioned (third and third). The fourth auxiliary lines 33 and 34 can be similarly changed).

  Furthermore, although the first and second auxiliary lines 31 and 32 are formed adjacent to each other, if the auxiliary lines 31 and 32 are formed too far, the cylindrical label 1 cannot be satisfactorily divided. As shown in FIG. 3A, the formation interval Z between the first auxiliary line 31 and the second auxiliary line 32 (one end of the cut portion 6 of the first auxiliary line 31 and the cut portion 6 of the second auxiliary line 32). Is preferably about 0.5 to 1.0 mm, for example. The same applies to the interval between the third auxiliary line 33 and the fourth auxiliary line 34.

Next, the cut 5 for the separation starting point is formed to extend in the circumferential direction in the region of one surface of the tubular film 2, and for example, as shown in FIG. It is formed parallel to the circumferential direction of the tubular film 2.
The cut 5 for the separation starting point has a form in which, for example, the cut lines 51 extending in the circumferential direction and the non-cut portions 52 are alternately formed (the cut lines 51 are formed intermittently). One end of the cut 5 is located in the vicinity of the cut portion 6 of the dividing auxiliary line 3 (second auxiliary line 32) formed on one side of the center seal 21, and the other end of the cut 3 is the center seal 21. It is located in the vicinity of the notch part 6 of the dividing auxiliary line 3 (3rd auxiliary line 33) formed in the other side.
The distance between the one end of the cut line 5 and the cut portion 6 of the dividing auxiliary line 3 (second auxiliary line 32) is preferably about 0.5 to 3.0 mm, for example. The same applies to the distance between the other end of the cut 5 and the cut portion 6 of the dividing auxiliary line 3 (third auxiliary line 33).
It should be noted that one end and / or the other end of the cut line 5 is cut by the cutting auxiliary line 3 because the cutability of the cylindrical label 1 is good and the cut line 51 of the cut line 5 is not too long. It is preferable to be formed in the vicinity of the insertion portion 6. However, instead of this, one end and / or the other end of the cut 5 may be formed so as to intersect with the cut portion 6 of the dividing auxiliary line 3.

The cut line 51 of the cut line 5 is formed by a linear opening penetrating from the outer surface 2a of the tubular film 2 to the inner surface 2b.
The vertical position for forming the cut line 5 is not particularly limited. However, it is preferable that the cut 5 is formed near the upper edge or the lower edge of the tubular film 2 because the cut 5 is used as a separation starting point of the cylindrical label 1. For example, the cut 5 is formed at a position away from the upper or lower edge of the tubular film 2 by about 3 to 6 mm in the vertical direction.
In particular, the cut 5 is preferably formed at a position corresponding to the recess (or panel surface) of the container to be mounted. When the heat-shrinkable cylindrical label 1 formed with such cuts 5 is mounted on a container, the cuts 5 are positioned corresponding to the recessed portions of the container. Therefore, the inner surface side of the cut 5 becomes a space, and the intermittent cut line 51 can be easily opened by pushing from the outer surface of the cylindrical label 1, and a part of the tubular film 2 can be picked through the cut 5.
In the illustrated example, one cut 5 is formed only near the upper edge of the tubular film 2, but instead, only one is formed near the lower edge of the tubular film 2. The cut 5 may be formed, or the cut 5 may be formed near the upper edge and the lower edge of the tubular film 2.
The circumferential lengths of the cut line 51 and the non-cut part 52 of the cut line 5 are not particularly limited, but if the cut line 51 is too short or the non-cut part 52 is too long, the tubular film through the cut line 5 It becomes difficult to open one surface of 2. Considering this point, it is preferable that the peripheral length 51X of the cut line 51 of the cut line 5 is about 2 to 15 mm, and the peripheral length 52X of the non-notched portion 52 is about 2 mm or less.

The cut line 5 (that is, the cut line 51) can be formed intermittently in the circumferential direction by a technique such as pressing a blade such as a Thomson blade against the film, or fusing the film using a laser beam or the like. In particular, if a part of the film is melted using a laser beam or the like, as shown in FIG. 4B, the film portion at the peripheral edge of the cut line 51, particularly at both ends 51 a in the circumferential direction of the cut line 51. Can be formed thick.
Thus, by forming the both ends 51a of the cut line 51 which comprises the cut line 5 thickly, the intensity | strength of the both ends 51a of the cut line 51 increases, and a crack arises from the edge part of the cut line 51. Can be prevented. In particular, when the cut line 51 is formed by film cutting using a laser beam or the like, the film portion at both ends 51a of the cut line 51 becomes thick and hardens, so that more cracks occur. It is difficult and preferable.

Next, the processing method which forms the said notch part 6 in a heat-shrinkable film is demonstrated.
For example, the following mechanical processing method is used to form the cut portions 6 having different peripheral lengths of the openings on the outer surface 2a and the inner surface 2b of the tubular film 2 in the heat-shrinkable film.
Specifically, as shown in FIG. 6, a rotating blade 100 having a plurality of blade portions 101 projecting around the periphery at predetermined intervals, and each blade portion 101 of the rotating blade 100 when the rotating blade 100 rotates. A processing apparatus including a receiving roll 200 disposed so as to face each other so that the front ends sequentially contact each other is used.
In this example, the heat-shrinkable film used for the cylindrical label 1 (that is, the cylindrical label 1 shown in FIG. 1) in which two dividing auxiliary lines 3 are formed adjacent to each other on both sides of the center seal 21. The case where a base material is manufactured is shown. However, the number and position of the rotary blades 100 are appropriately set and changed according to the number of forming auxiliary lines 3 and the forming position.

  The rotary blade 100 has a blade portion 101 protruding around a disc-shaped main body portion 102, and can be rotated by a driving device (not shown). As shown in FIG. 7, the blade portion 101 of the rotary blade 100 is formed in a substantially triangular shape with a tip formed in a pointed shape, and has a predetermined thickness (for example, 0.1 in the rotation direction). ~ 0.5mm). Each blade portion 101 protrudes radially on the outer periphery of the main body portion 102 with its triangular surface 101 a parallel to the rotation axis of the rotary blade 101. The angle of the tip of the blade portion 101 (vertical angle of the triangular surface 101a) is not particularly limited, but is preferably about 45 to 75 degrees.

The receiving roll 200 is composed of a roller that can be rotated by a driving device (not shown), and feeds the film 300 by turning the film 300 on the surface. The surface of the receiving roll 200 is configured so that the blade portion 101 of the rotary blade 100 can enter. For example, the receiving roll 200 is a soft material (for example, a synthetic resin such as rubber or a thermoplastic elastomer, a cloth, or the like) in which the blade portion 101 of the rotary blade 100 enters around a hard core material 201 (steel pipe or the like). The surface layer 202 made of is coated.
As shown in FIG. 6B, the rotary blade 100 and the receiving roll 200 are configured to rotate in synchronization with the film feeding direction. Further, the rotary blade 100 and the receiving roll 200 are arranged in parallel so that the blade portion 101 of the rotary blade 100 slightly enters the surface layer 202 of the receiving roll 200. Therefore, when the rotary blade 100 is rotated, each blade portion 101 enters the surface of the receiving roll 200 slightly.

  In addition, the space | interval of each blade part 101 of the rotary blade 100 respond | corresponds to the formation space | interval (vertical length 7Y of the non-cut part 7), and the thickness of the blade part 101 is the cutting part 6's thickness. Corresponding to the longitudinal length 6Y, the amount of insertion of the blade portion 101 into the film 300 corresponds to the circumferential length 6X of the cutting portion 6. However, the corresponding dimensions do not completely coincide with each other due to the elasticity and elongation of the film.

Using the rotary blade 100 and the receiving roll 200, the dividing auxiliary line 3 is formed on the heat-shrinkable film.
The film 300 is a base material constituting the cylindrical label 1 and has a long shape before being formed into a cylindrical shape.
The film 300 is pulled out and turned around the surface of the receiving roll 200, and the film 300 is supplied between the rotary blade 100 and the receiving roll 200 by the rotation of the receiving roll 200. The heat-shrinkable film is supplied with the main stretching direction being substantially parallel to the rotation axis of the rotary blade 100. As shown in FIG. 8, the blade portion 101 sequentially enters the supplied film 300 in a direction orthogonal to the main stretching direction of the film 300, and the blade portion 101 of the rotating rotary blade 100 is sequentially pushed. By the pressing of the blade portion 101, the tip of the blade portion 101 slightly penetrates the film 300. The triangular blade portion 101 slightly penetrates the film 300, so that the opening portion 6 on one surface of the film 300 is large and the opening area on the other surface is small. Cut portions 6 having a small length in the thickness direction of the tubular film are formed at predetermined intervals in the longitudinal direction (longitudinal direction) of the film 300 (see FIG. 6A).
The heat-shrinkable cylindrical label 1 is obtained by cutting the processed film 300 in the width direction, stacking both ends and center-sealing, and forming the cut 5 for the separation starting point.

According to the film processing method, the cut portion 6 that matches the outer shape of the blade 101 that has entered can be reliably formed in the film 300.
That is, conventionally, the perforation processing of this type of film is performed by feeding the film 300 while rotating the rotary blade 400 with the needle 401 projecting around, as shown in FIG. It is performed by the method of entering and exiting. The roller 500 for feeding the film 300 is formed with a space portion 501 in which the needle 401 entering the film 300 can freely enter and exit. As a result, the tip of the needle 401 penetrates the film 300 and enters the space 501, and then retreats as the rotary blade 400 rotates.
Since the tip of the needle 401 draws an arc-shaped trajectory by the rotation of the rotary blade 400, when the needle 401 penetrates greatly into the film 300, it takes a long time to contact the film 300 when the needle 401 enters and exits. Become. As a result, the film 300 is originally supposed to be formed with a circular hole adapted to the shape of the body of the needle 401. As shown in FIG. As a result, the tip 601 has a cusp-like mark 601 at the upper and lower ends of the hole 600.
When the pointed mark 601 is generated in the hole portion 600, when the heat-shrinkable cylindrical label 1 is thermally contracted, a contraction stress is applied to the portion, and the hole portion 600 easily expands, which may cause breakage due to impact. .

In this regard, according to the processing method of the present invention, the blade portion 101 of the rotary blade 100 is configured to come into contact with the surface of the receiving roll 200, so that the blade portion 101 does not enter the film 300 greatly. Therefore, the blades are separated from the film 300 quickly, and as a result, the occurrence of cusp marks caused by the tip of the rotating blade part 101 can be prevented.
In particular, since the cut portion 6 in which the length in the longitudinal direction of the tubular film 2 is constant depending on the thickness of the blade portion 101 can be reliably formed, the processing method for producing the heat-shrinkable tubular label 1 of the present invention. Can be suitably used.

The heat-shrinkable cylindrical label 1 having the above-described configuration is externally fitted to the container 8 and greatly contracted in the circumferential direction when heated to a predetermined temperature (for example, 80 to 100 ° C.). Thereby, a labeled container as shown to Fig.10 (a) is manufactured.
The heat-shrinkable cylindrical label 1 can be heat-shrinkable and attached to various containers 8 in which desired storage items such as beverage containers, food containers, and cosmetic containers are stored.
The material of the container 8 is not particularly limited, and the heat shrinkage of the present invention can be applied to various materials such as synthetic resin containers such as polyethylene terephthalate (for example, PET bottles), foamed resin containers, glass containers, metal containers, and the like. The heat-resistant tubular label 1 can be attached by heat shrinkage.
Also, the shape of the container 8 is not particularly limited, and the container 8 (for example, a bottle shape as shown in the figure) in which an inclined shoulder portion 82 that gradually decreases is formed above the cylindrical portion 81 such as a cylindrical shape or a prismatic shape. Etc.), a cylindrical container having no shoulder, a cylindrical container having a prismatic shape, and a container having various shapes such as a bowl-shaped container and a conical container having a conical shape.

The heat-shrinkable cylindrical label 1 is attached to the container 8 by being greatly heat-shrinked in the circumferential direction when heated.
In the heat-shrinkable cylindrical label 1 of the present invention, since the circumferential length of the cut portion 6 of the auxiliary dividing line 3 is reduced in the thickness direction of the tubular film, a large tensile force is exerted in the circumferential direction during heat shrinkage. Even if added, it is possible to prevent the cut portion 6 of the dividing auxiliary line 3 from expanding into an elliptical shape or the like. In particular, the notch 6 has a large opening on the inner surface 2b of the tubular film 2 (the outer surface 2a in the modified example described in [0023] above) and is formed on the outer surface 2a (the inner surface 2b in the modified example). The opening is small. Therefore, compared with the case where it forms with the same opening area in the thickness direction of the cylindrical film 2, the expansion of the notch | incision part 6 can be prevented more reliably at the time of heat contraction.
Therefore, even if an impact is applied to the labeled container to which the heat-shrinkable cylindrical label 1 is attached, the cylindrical label 1 is difficult to break. Moreover, since the notch part 6 of the parting auxiliary | assistant line 3 does not expand at the time of mounting | wearing, the container with a label which exhibits a beautiful external appearance can be provided.

  Further, the heat-shrinkable cylindrical label 1 has a cut starting point 5 for cutting start extending in the circumferential direction on one surface of the cylindrical film 2. One surface of 2 can be opened, and a part of cylindrical film 2 can be picked from this opening edge. Thus, since the surface part of the cylindrical film 2 can be opened, a part of the cylindrical film 2 can be easily picked regardless of the mounting position of the cylindrical label 1 with respect to the container.

And if a part of cylindrical film 2 is picked and pulled, it will begin to cut from the both ends of the cut 5, and the cutting line 9 will be formed. Since both ends of the cut line 5 are located in the vicinity of the dividing auxiliary line 3, the cut line 9 to be formed is the dividing auxiliary line 3 (second auxiliary line 32 and third auxiliary line formed on both sides of the center seal 21. To line 33). And as shown in FIG.10 (b), the center seal | sticker 21 can be cut off as a strip | belt-shaped fragment | piece by forming the cutting line 9 along this parting auxiliary line 3. As shown in FIG.
By the way, since the cut portion 6 of the dividing auxiliary line 3 is formed in a linear shape extending in the circumferential direction, the cutting line 9 becomes the cut portion 6 of the second auxiliary line 32 or the third auxiliary line in the middle of dividing. There is a risk of changing the direction from the end of the cut portion 6 of the line 33 in the circumferential direction.
In this regard, since at least two parting auxiliary lines 3 on both sides of the center seal 21 are formed adjacent to each other, for example, the cutoff line 9 is circumferentially extended from the end of the cut part 6 of the second auxiliary line 32. Even if the direction is changed, the cut line 9 reaches the first auxiliary line 31 formed adjacent to the first auxiliary line 31 and returns to the vertical direction again. Therefore, the cut line 9 is reliably formed in the vertical direction along the dividing auxiliary line 3, whereby the cylindrical label 1 can be reliably cut in the vertical direction.

  Moreover, since the cut 5 for the dividing starting point is formed across the center seal 21 which is thick by overlapping both side ends of the base material, the center seal 21 is cut at the cut 5, The thick-walled center seal 21 can be cut out as a strip-shaped segment. Therefore, the cylindrical label 1 can be reliably divided in the vertical direction and removed from the container 8 without being interrupted in the middle of the division.

Next, the modification of this invention is shown. Hereinafter, configurations and effects different from those of the above-described embodiment will be mainly described, and descriptions of similar configurations and effects may be omitted, and terms and drawing numbers may be used.
In the said embodiment, the notch part 6 of the division | segmentation auxiliary | assistant line 3 is different from the opening area in the inner surface 2b and the outer surface 2a of the cylindrical film 2, and is from the linear opening penetrated in the thickness direction of the cylindrical film 2. However, for example, the cut portion 6 of the dividing auxiliary line 3 may be in a non-penetrating manner that does not penetrate from the outer surface 2 a to the inner surface 2 b of the tubular film 2. For example, as shown in FIG. 11, the cut portion 6 may be configured by a linear recess (including a so-called half cut) formed from the inner surface 2 b side of the tubular film.
Contrary to the above, the non-penetrating cut portion 6 may be formed by a linear recess (so-called half cut) formed from the outer surface 2 a side of the tubular film 2.
However, the circumferential length of the non-penetrating notch 6 indicates the longest opening of the notch 6.
In the cut portion 6 illustrated in FIG. 11, the opening in the inner surface 2 b of the tubular film is formed long in the longitudinal direction of the tubular film 2, but may be long in the circumferential direction of the tubular film 2. .

In the case where the cut portion 6 of the dividing auxiliary line 3 is non-penetrating, there is no possibility that the cut portion 6 expands during heat shrinkage, which is a more preferable aspect in terms of impact resistance and mounting appearance.
On the other hand, when the cut portion 6 of the dividing auxiliary line 3 is non-penetrating, it is considered inferior to the penetrating one in terms of the dividing property of the cylindrical label 1. But even if it is the non-penetrating cut part 6, since the part in which it was formed becomes easy to cut compared with the part in which it is not formed, only the parting auxiliary line which has this cut line 6 The cylindrical label 1 can be divided along 3.

The non-penetrating cut portion 6 can be formed, for example, by changing the receiving roll 200 shown in the processing method as follows.
That is, instead of the receiving roll 200 having the soft surface layer 202, the receiving roll 200 having the hard surface layer 202 is used. The hard surface layer 202 prevents the blade portion 101 from entering the surface layer 202 even when the blade portion 101 of the rotary blade 100 abuts. The receiving roll 200 having such a surface layer 202 can be configured by covering the core material 201 with a steel material or using the core material 201 (steel pipe or the like) as it is.
The receiving roll 200, the rotary blade 100, and the receiving roll 200 are disposed in parallel with each other at a position where the blade portion 101 of the rotary blade 100 contacts the surface layer 202 of the receiving roll 200. Therefore, when the rotary blade 100 rotates, each blade portion 101 sequentially contacts the surface of the receiving roll 200.
When the non-penetrating cut portion 6 is formed by the rotary blade 100, the amount of the blade portion 101 inserted into the film 300 (that is, the depth of the cut portion 6) is 0.05 mm. In this case, for example, about 0.05 to 0.1 mm can be mentioned, and the circumferential length of the opening of the cut portion 6 is, for example, about 0.05 mm, and the longitudinal length of the opening is, for example, about 0.2 mm. Can be mentioned.

Then, by supplying the film 300 between the rotary blade 100 and the receiving roll 200, the blade portion 101 of the rotating rotary blade 100 is sequentially pushed into the film 300 as shown in FIG. Since the tip of the blade part 101 is disposed so as to contact the surface layer 202 of the receiving roll 200, the blade part 101 does not penetrate the film 300. Accordingly, the non-penetrating cut portion 6 that is long in the longitudinal direction of the film 300 can be formed in the film 300.
In addition, although the processing method of this modification can form the non-penetrating cut portion 6 by the above configuration, since the blade portion 101 of the rotary blade 100 is pressed against the film 300, all the cut portions to be formed are formed. 6 is not necessarily formed in a non-penetrating shape. For example, some of the cut portions 6 among the formed cut portions 6 may be formed in a penetrating shape.

  In the processing method for forming the penetrating and non-penetrating incisions 6, the blade 101 of the rotary blade 100 has a pointed tip and a triangular shape with a predetermined thickness. You can also use things other than the ones you did.

In the above embodiment, the dividing auxiliary line 3 is preferably formed on both sides of the center seal 21, but as shown in FIG. 13 (a), either one side of the center seal 21 is provided. It may be formed only on.
Moreover, since the thick-walled center seal 21 can be cut into a strip shape as a segment, it is preferable to form the dividing auxiliary line 3 along the vicinity of the center seal. For example, as shown in FIG. As described above, it is also possible to form the dividing auxiliary line 3 in a region where the center seal 21 is not formed.
Moreover, in the said embodiment, although the division | segmentation auxiliary | assistant line 3 is formed adjacent to two adjacent, for example, as shown to Fig.14 (a), the one division | segmentation auxiliary | assistant line 3 is formed. It may be what you have. It is also possible to form three or more auxiliary cutting lines 3 adjacent to each other.

Furthermore, in the said embodiment, although the cut 5 consists of what the cut line 51 was formed in intermittent shape, as shown to Fig.14 (a), the cut 5 is formed of the single cut line 51. FIG. May be. However, in the case of this modification, since the peripheral length of the cut line 51 is relatively long, foreign matter may enter the inside of the cylindrical label 1 from the cut 5 when the labeled container is transported or stored, or the cut There is a possibility that the cylindrical label 1 may be carelessly broken from 5. Considering this point, it is preferable that the cut line 5 has the cut line 51 formed in an intermittent manner as in the above embodiment.
Further, the cut 5 is not limited to the configuration formed in parallel to the circumferential direction, and may be formed obliquely (inclined) with respect to the circumferential direction, for example, as shown in FIG. Further, the cut 5 is not limited to a straight line shape in front view, and may be formed in, for example, a circular arc shape or a wave shape in front view. Moreover, the heat-shrinkable cylindrical label 1 in which the cut 5 is not formed may be used.

Furthermore, although the said processing method illustrated the case where the notch part 6 extended linearly in the circumferential direction of the cylindrical film 2 was illustrated, the processing method of the heat-shrinkable film of this invention is not restricted to this, For example, The above processing method can also be applied to the case where the cut portion 6 extending linearly in the longitudinal direction of the tubular film 2 is formed.
In addition, in each said figure, although the notch part 6, the notch line 51, etc. are drawn linearly, in reality, a curve, a deformation | transformation, etc. occur due to the processing distortion etc. of a film.

The front view which shows one Embodiment of the heat-shrinkable cylindrical label of this invention. FIG. (A) is an enlarged front view of the circled part A of FIG. 1, (b) is CC sectional view taken on the line of FIG. 3 (a). (A) is an enlarged front view of the circled B part of FIG. 1, (b) is the DD sectional view taken on the line of FIG. 4 (a). The principal part enlarged front view which shows the modification of the formation position of a 1st auxiliary line and a 2nd auxiliary line. (A) is a partial omission front view of the processing apparatus (mainly a rotary blade and a receiving roll) of this invention of a dividing auxiliary line, (b) is the side view. (A) is a partially omitted perspective view showing a blade portion formed on a rotary blade, (b) is a side view with the same portion omitted, and (c) is a sectional view taken along line EE of (b). (A) is a partially omitted cross-sectional view showing the process of forming a dividing auxiliary line on the film by the processing method of the present invention, and (b) is a cross-sectional view taken along the line FF of (a). The perforation formation method by the conventional processing apparatus is shown, (a) is a partially omitted sectional view showing the process of forming the perforation on the film using the processing apparatus, and (b) is the same as (a). GG sectional drawing, (c) is an enlarged front view which shows the formed hole part. (A) is a front view which shows the labeled container which mounted | wore with the said heat-shrinkable cylindrical label, (b) is a front view which shows the state at the time of parting the cylindrical label of the container. (A) is a principal part enlarged front view which shows the modification of the notch part of a parting auxiliary line, (b) is the HH sectional view of the same (a), (c) is a non-penetrating cut. The schematic perspective view which shows an insertion part. (A) is a partially omitted cross-sectional view showing a process of forming a dividing auxiliary line on a film by a processing method according to a modification of the present invention, and (b) is a cross-sectional view taken along the line II of FIG. (A), (b) is a front view which shows the heat-shrinkable cylindrical label which concerns on a modification. (A), (b) is a front view which shows the heat-shrinkable cylindrical label which concerns on a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Heat-shrinkable cylindrical label, 2 ... Cylindrical film, 21 ... Center seal, 3 ... Dividing auxiliary line, 31-34 ... 1st-4th auxiliary line, 5 ... Cut for dividing start point, 51 ... Cut Cutting line, 6 ... cutting part of the cutting auxiliary line, 7 ... non-cutting part of the cutting auxiliary line, 8 ... container, 100 ... rotating blade, 101 ... blade part of the rotating blade, 200 ... receiving roll, 202 ... receiving Roll surface layer, 300 ... film

Claims (3)

A cylindrical film having heat shrinkability at least in the circumferential direction, and a dividing auxiliary line having a cut portion formed intermittently in the vertical direction of the cylindrical film,
The cut portion of the dividing auxiliary line has a circumferential length that is reduced in the thickness direction of the tubular film, and the cut portion is formed to penetrate from one surface of the tubular film to the other surface. A heat-shrinkable cylindrical label characterized in that the opening area on the other surface is smaller than the opening area on one surface of the film. A cylindrical film having heat shrinkability at least in the circumferential direction, and a dividing auxiliary line having a cut portion formed intermittently in the vertical direction of the cylindrical film,
The cut portion of the dividing auxiliary line has a circumferential length that is reduced in the thickness direction of the tubular film, and the cut portion is formed in a concave shape that does not penetrate the tubular film. A heat-shrinkable cylindrical label. A rotary blade having a plurality of blade portions projecting at predetermined intervals around the periphery, and a receiving roll provided so that the tips of the blade portions of the rotary blade sequentially come into contact when the rotary blade rotates. The blade portion has a substantially triangular shape with a pointed tip, and has a predetermined thickness in the rotation direction of the rotary blade,
Supplying a heat-shrinkable film between the blade portion of the rotary blade and the receiving roll and rotating the rotary blade, the blade portion of the rotary blade is sequentially entered in a direction perpendicular to the main stretching direction of the heat-shrinkable film, and the film A method of processing a heat-shrinkable film, comprising forming a cut portion at a predetermined interval in the heat-shrinkable film by pressing each blade part against the heat-shrinkable film.

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