JP4289995B2 - Tubular film - Google Patents

Description

  In the present invention, for example, a cylindrical cap seal is separated by a separation perforation extending in the circumferential direction like a long tubular film continuously connected through a separation perforation. The present invention relates to a tubular film.

  For example, when a cylindrical cap seal is attached to the mouth of a container, a long cylindrical film in a state of being folded into a sheet shape, in which the cap seal is continuously connected, is opened to a predetermined length while being opened in a predetermined state. A method is generally employed in which individual cap seals are formed by sequentially cutting the caps, and then the opened individual cap seals are fitted into the mouths of the containers.

  By the way, as shown in FIG. 3, as the cap seal for sealing the mouth of the container, the knob 50 is protruded from the upper end, and when the container is opened, the knob 50 is picked and broken. There are two rear breaker vertical perforations 52 connected to the knob 50 so that the cap seal 5A protruding from the knob 50 can be formed into a long cylinder. Since the rotary cutter cannot be used when separating from the film-like film, as shown in FIG. 4, such a cylindrical cap seal 5 </ b> A is inserted through a separation perforation 51 at a portion other than the knob portion 50. A continuous tubular film 5 that is continuously connected is manufactured, and is sent out while separating the cap seal 5A from the tubular film 5 by a cap seal delivery device as shown in FIG. It has become way.

  As shown in the figure, the cap seal delivery device includes a mandrel M that opens in a predetermined state by inserting a cylindrical film 5 fed from a raw roll R, and a cylinder that is inserted into the mandrel M. The cylindrical film 5 is sandwiched between the mandrel M on the downstream side of the feeding roller R1 and the mandrel M on the downstream side of the feeding roller R1. The cylindrical film 5 is sequentially broken at the separation perforation 51 due to the difference in rotational speed with the separation perforation 51, so that the cap seal 5A is separated from the cylindrical film 5 and sent from the mandrel M, and a mandrel is provided. The cap seal 5A sent out from M is sequentially applied to the mouth of the container P which is sequentially conveyed at a predetermined conveyance pitch by the belt conveyor BC. It is adapted to be inserted.

JP 2002-331497 A

  By the way, the separation perforation 51 and the post-breaking vertical perforation 52 formed on the tubular film 5 as described above have a connection ratio (ratio of the length not cut to the total length of the perforation) of 50. Further, the feeding roller R1 and the breaking feeding roller R2 that break the cylindrical film 5 with the separation perforation 51 are opened in a cylindrical shape by the mandrel M, which is set to a constant value determined within a range of ˜25%. Since the cylindrical film 5 is in contact with the cylindrical film 5 only at two locations facing each other in the circumferential direction, the portion where the feeding roller R1 and the breaking and feeding roller R2 are in contact with each other is easily broken. There is a problem that the tubular film 5 is less likely to be broken as the distance from the R1 and the break-off feeding roller R2 increases.

  In order to improve the breakability of the tubular film 5 away from the delivery roller R1 and the breakage delivery roller R2, it is conceivable to reduce the connection rate of the separation perforations 51, but the connection rate of the separation perforations 51. Is reduced by the separation perforation 51 before the separation perforation 51 reaches between the delivery roller R1 and the breaking delivery roller R2 due to the delivery resistance of the tubular film 5 when passing through the mandrel M. There arises a new problem that the tubular film 5 is broken.

  Therefore, an object of the present invention is to provide a cylindrical film that is not easily broken during conveyance and can be reliably broken at the time of breakage.

In order to solve the above problems, the invention according to claim 1 is directed to a mandrel, a plurality of delivery members disposed in a circumferential direction of the mandrel, and a position corresponding to the delivery member on the downstream side of the delivery member. A cylindrical film formed with a perforation for separation extending in the circumferential direction, which is sent out while being cut off by a film sending device provided with a plurality of breaking members arranged, the mandrel for opening in a predetermined state in fitting interpolated state, by the delivery member及beauty said rupture member multiple multiple, the serves as the sandwiched between the mandrel, the operation speed difference between the delivery member and the rupture member by being adapted to be separated so as to be torn apart by the separating perforations, the separating perforations member contact portion where the delivery member and said rupture member contacts Ties of 50% to 25%, lead rate of the portion excluding the member contact portion is to provide a tubular film, characterized in that it is set to 20% or less.

  Here, the “member contact portion” does not mean a portion where the sending member or the breaking member strictly contacts, but means the vicinity where the sending member or the breaking member contacts. Therefore, in this “member contact portion”, there may be a part of the area where the feeding member or the breaking member does not contact, and conversely, the area where the sending member or the breaking member contacts may be partially excluded. Good.

  Further, the “connection rate” here is calculated by the arithmetic expression shown in Equation 1, but “Lt” is a “perforation part” or “part excluding the contact part” among the perforations for separation. This is the length of the specific portion, and “Lc” is also the total length of the cuts included in the specific portion of the separation perforation.

As described above, in the tubular film according to the first aspect of the present invention, the separation perforation has a connection rate of 50% to 25% of the member contact portion where the feeding member and the breaking member are in contact, excluding the member contact portion. Since the connection rate of the parts is set to 20% or less , compared to the conventional tubular film in which the connection rate of the separation perforation is set to be the same over the entire length, the part where the feeding member and the breaking member do not contact Is easier to break, and the separation perforation breaks before the separation perforation reaches between the delivery member and the breaking member, as compared to the case where the separation perforation is reduced overall. The inconvenience that it is done does not occur easily.

  Hereinafter, embodiments will be described with reference to the drawings. As shown in FIG. 1, the cylindrical film 1 is formed by continuously connecting a cylindrical cap seal 1 </ b> A that seals a mouth portion of a bottle container or the like via a perforation 11 for separation. As shown in Fig. 2, the cap seal 1A is supplied in a folded state and is opened into a cylindrical shape by a cap seal delivery device as shown in Fig. 5, and then each cap seal 1A is sequentially separated. Yes.

  The cap seal 1A is formed of a heat-shrinkable film stretched in the lateral direction made of polyester resin, polystyrene resin, polypropylene resin or the like, and as shown in FIG. 1, a knob portion protruding from the upper end portion. 10a, a cut portion 10b in which the same region as the pick portion 10a is cut from the lower end, a post-breaking horizontal perforation 12 formed in the middle portion in the length direction and extending in the circumferential direction; There are two rear perforating vertical perforations 13 from the perforation 12 to the knob 10a. A bottle container or the like whose mouth is sealed by the cap seal 1A breaks the vertical perforation 13 for rear break and the horizontal perforation 12 for rear break by pulling and pulling the knob 10a of the attached cap seal 1A. By doing so, the upper half of the cap seal 1A can be peeled off and opened.

  As shown in FIG. 1, the tubular film 1 is opened in a tubular shape by a mandrel (not shown) of the cap seal delivery device, and both sides centered on the knob 10a are arranged on the cap seal delivery device. The separation perforations 11 formed on the tubular film 1 are displayed in a shaded manner as shown in FIG. 2. The coupling rate of the roller non-contact portion β set outside the roller contact portion α is smaller than the coupling rate of the roller contact portion α including the contact area of the feeding roller R1 and the breaking delivery roller R2. Yes. As described above, the “connection rate” of the perforation means the ratio of the length that is not cut to the entire length of the perforation, and is calculated by the arithmetic expression shown in Equation 1.

  Specifically, it is desirable to set the connection rate of the roller contact portion α in the separation perforation 11 to 50 to 25% and the connection rate of the roller non-contact portion β to 20% or less. This is because, when the coupling ratio of the roller non-contact portion β exceeds 20%, it becomes difficult to tear off the roller non-contact portion β by the feed roller R1 and the breaking feed roller R2. Further, when the coupling ratio of the roller contact portion α exceeds 50%, it becomes difficult to tear the roller contact portion α by the feeding roller R1 and the breaking feeding roller R2, and even if it can be torn off, the breakage will occur. This is because the part becomes jagged and the appearance becomes worse. When the ratio is less than 25%, the separation perforation 11 is formed between the feeding roller R1 and the breaking feeding roller R2 when the connection ratio of the roller non-contact portion β is reduced. This is because the separation perforation 11 is torn before reaching the interval. In consideration of the tearability described above, the appearance of the fracture portion, and the like, in the case of a film having a thickness of 30 to 50 μm, the uncut length (uncut length) in the separation perforation 11 is 1.0 mm or less. In particular, it is preferable to set to 0.3 to 0.7 mm.

  Examples of the cylindrical film of the present invention will be described below. As shown in FIG. 2, the film width L in the folded state is 145 mm, the width Lr of the feeding roller R1 and the breaking and feeding roller R2 is 26 mm, the half width Ln of the knob 10a is 5 mm, and the roller in the separation perforation 11 For a cylindrical film having a length of the contact portion α of 46 mm, a left side (the knob 10a side) roller non-contact portion β of 51 mm, and a right roller non-contact portion β of 48 mm, The tearing performance of the cap seal from the cylindrical film when the thickness and the connection ratio of the roller contact portion α and the roller non-contact portion β in the separation perforation 11 are changed are applied to the mouth portion of the cap seal bottle container. The maximum mounting speed was evaluated, and the results are shown in Table 1.

  In addition, regarding a conventional cylindrical film in which the pure perforation portion having a length of 145 mm, excluding the complete cuts 11a and 11b in the separation perforation 11, has a uniform connection rate over the entire length thereof, Evaluating the tearing performance of the cap seal from the tubular film 1 when changing the material and thickness, and the connection rate of the perforation 11 for separation, as the maximum mounting speed of the cap seal to the mouth of the bottle container, The results are shown in Table 2.

  In the state in which these tubular films are folded, as shown in FIG. 2, a 5 mm complete cut 11a is formed at the left folded end (the left end of the left roller non-contact portion β), as described above. In addition, there is a 2 mm perfect cut 11b at the right turn-up end (the right end of the right roller non-contact portion β). It is assumed that the cuts 11a and 11b are not included in the separation perforation 11. Therefore, the “cut length” and “non-cut length” of the roller non-contact portion β in Table 1 and the “cut length” and “non-cut length” in Table 2 are the original values excluding such complete cuts 11a and 11b. The lengths of cuts and non-cuts constituting the perforation part are shown.

  First, as can be seen from Tables 1 and 2, for the cylindrical films of Examples 1 to 3 and Comparative Examples 1 to 4 formed of a polyethylene terephthalate film having a thickness of 40 μm, the roller contact at the perforation 11 for separation is performed. The tubular film of Examples 1 to 3, in which the connection rate of the part α is 50 to 25% and the connection rate of the roller non-contact part β is set to 20% or less, the connection rate of the separation perforation 11 is the full length. Compared with the cylindrical films of Comparative Examples 1 to 4 that are set substantially uniformly, the maximum mounting speed of the cap seal is high.

  Moreover, as can be seen from Table 1 and Table 2, it is formed by the cylindrical film of Example 4 and Comparative Example 5 formed by an oriented polypropylene film having a thickness of 50 μm or an oriented polystyrene film having a thickness of 60 μm. Also for the cylindrical films of Example 5 and Comparative Example 6, the connection rate of the roller contact portion α in the separation perforation 11 is set to 50 to 25%, and the connection rate of the roller non-contact portion β is set to 20% or less. In comparison with the tubular films of Comparative Examples 5 and 6 in which the tubular films of Examples 4 and 5 have the connection rate of the separation perforations 11 set substantially uniformly over the entire length, Is high.

  As described above, the connection rate of the roller non-contact portion β excluding the roller contact portion α is greater than the connection rate of the roller contact portion α at which the separation perforation 11 is in contact with the delivery roller R1 and the breaking delivery roller R2. The smaller tubular films of Examples 1 to 6 are in contact with the feeding roller R1 and the breaking feeding roller R2 than the conventional tubular film in which the connection rate of the separation perforations is set uniformly over the entire length. The portion not to be broken is easily broken, and before the separation perforation 11 reaches between the delivery roller R1 and the breakage delivery roller R2, as compared with the case where the connection rate of the separation perforation is reduced as a whole, Inconveniences such as breakage at the separation perforation 11 hardly occur, and good tearing performance can be ensured.

  In the above-described embodiment, the width of the roller contact portion α is set to be larger than the width Lr of the feed roller R1 and the breaking feed roller R2, but the present invention is not limited to this, and the roller contact portion α is not limited to this. It is also possible to set the width to be the same as the width Lr of the feed roller R1 or the breaking feed roller R2, or to set it slightly smaller than the width Lr of the feed roller R1 or the break feed roller R2.

  Further, in the above-described embodiment, the original perforation composed of a large number of cuts and non-cuts is formed in both the roller contact part α and the roller non-contact part β in the separation perforation 11, but this is not limitative. The roller non-contact portion β can be formed by a complete cut so that the connection ratio of the roller non-contact portion β is 0%.

  In the above-described embodiment, the tubular film in which the complete cuts 11a and 11b are formed at both ends of the separation perforation 11 in a state of being folded into a sheet has been described. However, the present invention is not limited to this. Rather, the present invention can be applied to a cylindrical film in which a complete cut is not present, such as a cylindrical film in which a perforation for separation consisting of an original perforation is formed over the entire circumference. Needless to say, it can be done.

  In the above-described embodiment, the tubular film 1 in which the plurality of cap seals 1A having the knob portion 10a are continuously connected has been described. However, the present invention is not limited to this, and the knob portion and the horizontal sewing machine for rear breakage are not limited thereto. Various cylinders of a type that can be torn off by a perforation for separation, such as a label-forming base material in which a simple cylindrical tubular label or the like without a vertical perforation for post-breaking is connected via a perforation for separation The present invention can be applied to a film.

  In the above-described embodiment, the tubular film that is broken by the difference in rotational speed between the feeding roller R1 and the breaking feeding roller R2 has been described. However, the present invention is not limited to this. Instead, a delivery belt and a break delivery belt that are respectively stretched between a pair of pulleys are employed, or a break arm that is retracted in the delivery direction of the tubular film while the tubular film is pressed against the mandrel is employed. It goes without saying that the present invention can also be applied to a tubular film that is broken by a film delivery apparatus.

It is a perspective view which shows one Embodiment of the cylindrical film concerning this invention. It is a top view which shows the state which folded the cylindrical film same as the above into a sheet form. It is a perspective view which shows a general cap seal. It is a top view which shows the state which folded the cylindrical film which the cap seal same as the above connected. It is a schematic block diagram which shows the cap seal delivery apparatus which tears off a cap seal from the cylindrical film same as the above, and sends out.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylindrical film 1A Cap seal 10a Knob part 10b Cut part 11 Separation perforation 11a, 11b Cut 12 Lateral break perforation 13 Rear break vertical perforation α Roller contact part β Roller non-contact part R1 Feeding roller Element)
R2 Breaking delivery roller (breaking member)

Claims (1)

By a film delivery apparatus comprising a mandrel, a plurality of delivery members arranged in the circumferential direction of the mandrel, and a plurality of breaking members arranged at positions corresponding to the delivery members on the downstream side of the delivery member It is a tubular film in which a perforation for separation extending in the circumferential direction is sent out while being separated,
In fitting interpolated state to the mandrel in order to open to a predetermined state, by the delivery member及beauty said rupture member multiple multiple, serves as the sandwiched between said mandrel,
The operating speed difference between the breaking member and the delivery member is adapted to be separated so as to be torn apart by the separating perforation,
In the separation perforation, the connection rate of the member contact portion where the delivery member and the breaking member contact is set to 50% to 25% , and the connection rate of the portion excluding the member contact portion is set to 20% or less . A cylindrical film characterized by

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