JP5349374B2 - Tape for bundling food bags - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive tape being a tape for bundling a bag mouth of a food bag to be used when a plastic bag storing a food is bundled by leaving a space above the food, and is easily opened and can be reused. <P>SOLUTION: In the tape for bundling the bag mouth of the food bag, the pressure-sensitive adhesive tape with a width of 11-21 mm has a non-pressure-sensitive adhesive part with a width of 0.5-1.5 mm from one end edge in the width direction and a non-pressure-sensitive adhesive part with a width of 6.5-8.5 mm from the other end edge in the respective longitudinal direction, and has a pressure-sensitive adhesive part between two non-pressure-sensitive adhesive parts, and the pressure-sensitive adhesive force of the pressure-sensitive adhesive of the pressure-sensitive adhesive part measured by a T-type peeling method based on JIS Z 0237 is a peeling adhesive strength of 3.75-5.10 N/8 mm width after 5 seconds from making the pressure-sensitive adhesive parts adhere to each other, and of 4.00-6.00 N/8 mm width after 5 days from making the pressure-sensitive adhesive parts adhere to each other, is used. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention includes breads such as bread and confectionery bread, crab noodles such as salmon udon and crab soba noodles, fish paste products such as tsumelet and fried fish, and various types of vegetables and other plastic bags, leaving a space on the food. The present invention relates to a bag mouth bundling tape used for bundling and a method for manufacturing the same.

  When a soft food such as bread is stored in a plastic bag for sale, the food tends to be deformed if the food is concentrated and stored. In order to prevent the deformation of the food and store it without leaving a space, careful attention is required, so that the work efficiency is lowered. Therefore, in general, a bag whose inner volume is larger than the volume of the contents (food) is used, and the bag is stored leaving a wide space. By leaving a wide space, food can be stored with high efficiency while preventing deformation of the contents.

  However, a food package having a large internal space relative to the volume of food is fluffy and difficult to handle during transportation and store display. Therefore, in practice, the plastic bag is bundled in the portion constituting the internal space of the plastic bag, that is, by adding a throttle, the volume of the internal space is reduced, and the plastic bag is then distributed. The member used for bundling or squeezing must be easily removed when opened by the consumer. What is used as such a member has changed with the times, such as rubber bands, vinyl ties, and quick locks.

  As shown in FIG. 5, the quick lock punches a small piece 1 having a side of 1.5 to 2.5 cm from a plastic sheet having a thickness of 0.2 to 0.3 mm, and forms a throttle hole 2 in the center. In addition, a slit 3 that extends outward from the aperture 2 is provided. The small piece 1 has a leg portion 4 whose width decreases toward the slit 3. This facilitates mounting and dismounting from the food bag. Patent Document 1 discloses a bundling clip that is a quick lock and has improved ease of attachment and removal. This binding clip is provided with a U-shaped cutout from one side of the clip, leaving both legs so that the legs can be engaged with each other.

  Such clips are easy to remove, but they are disliked and often re-used after the consumer has removed some of the contents because of the fine manual work. Absent. And if the contents of the bag are not consumed at a time, the bag mouth cannot be left open until the next consumption, so the customer uses a different tying tool. . Furthermore, the biggest problem with this type of clip is that if this clip is left unattended, there is a risk that the infant will enter the mouth. Ingestion by infants can lead to fatal accidents. Therefore, in some countries, there is a situation in which binding of the package by this kind of clip is prohibited.

  An adhesive tape is also widely used as a binding member for food packaging plastic bags. However, the adhesive tape has a problem that it is difficult to remove and a problem that it cannot be reused.

  For example, Patent Document 2 has an adhesive layer on one side of a support that has improved the ease of peeling of an adhesive tape, and a non-adhesive portion having a shape in which the edge in the width direction of the adhesive tape is a part of the outer edge. An adhesive tape that is continuously formed in the longitudinal direction and has an area ratio of 1 to 40% of a non-adhesive portion is disclosed. Patent Document 3 discloses an adhesive tape in which a non-adhesive portion extending in the longitudinal direction is provided inside the width direction of the adhesive tape. This means that when the pressure-sensitive adhesive tape is peeled off, it is possible to easily find the site where peeling is started due to the presence of the non-sticking portion.

JP 2002-193225 A JP 2003-049134 A Japanese Patent Laid-Open No. 11-061058

  Patent Documents 2 and 3 only disclose an adhesive tape provided with a non-adhesive portion, and do not disclose any use or re-adhesiveness. In a packaging body in which food that is easily deformed is stored in a plastic bag, it is a tape for binding the plastic bag in a portion constituting the internal space on the food, and is used for easy opening and rebinding. An adhesive tape that can be used is not disclosed. The present invention relates to a food bag bag binding tape used when a plastic bag containing food is bundled while leaving a space on the food, the adhesive tape being easy to open and reusable The purpose is to provide.

  That is, the present invention is an adhesive tape having a width of 11 to 21 mm, a non-adhesive portion having a width of 0.5 to 1.5 mm from one edge in the width direction, and 6.5 to 8. A non-adhesive part having a width of 5 mm is provided in the longitudinal direction, and an adhesive part is provided between the two non-adhesive parts. The adhesive strength of the adhesive of the adhesive part is a T-type peeling method in accordance with JIS Z 0237. Measured, 5 seconds after adhering the adhesive parts to 3.75 to 5.10 N / 8 mm width, 5 days after adhering the adhesive parts to 4.00 to 6.00 N / 8 mm width The present invention relates to a bag mouth bundling tape for a food bag characterized by having a peel adhesion strength. This adhesive tape is used when the lower part of the bag mouth of a plastic bag containing food is bound by attaching the tape to the palm.

  In addition, the present invention provides an adhesive application portion having a constant width on one surface of the plastic base material fabric in a vertical stripe shape with a constant interval, and is an adhesive non-application portion, from the adhesive application portion edge. The raw fabric is cut at a position 0.5 to 1.5 mm away and the width of the cut tape is 11 to 21 mm, and the cut tape is wound around a paper tube. The present invention also relates to a method for producing a bag mouth binding tape for a food bag according to the present invention.

  The pressure-sensitive adhesive tape of the present invention has a wide non-adhesive portion at one end edge in the width direction. When the adhesive parts of the adhesive tape are adhered to each other, it is difficult to directly peel the adhesive part. However, since the tape of the present invention has a wide non-adhesive part at one end edge thereof, a finger or a nail is inserted into this non-adhesive part, and the two non-adhesive parts pasted together are pulled in opposite directions. Thus, the adhesive part can be peeled off. Since the adhesive part of the adhesive tape of the present invention uses a re-adhesive adhesive, the customer can use the adhesive tape of the present invention as many times as necessary without using other binding members. It can be used to repeat the re-bundling of the bag mouth and the peeling of the tape.

  According to the present invention, there is provided an adhesive tape suitable for bundling plastic bags constituting a space on a food of a food package, which can be easily opened and rebound. By providing such an adhesive tape, there is no need to use a clip that is a plastic piece that can be accidentally swallowed by an infant.

FIG. 1 is a plan view of one embodiment of the bag mouth binding tape of the present invention. FIG. 2 is an explanatory view showing an example of a method for producing the bag mouth binding tape of the present invention. FIG. 3 is an explanatory view showing a method for measuring the adhesive strength of the adhesive tape. FIG. 4 is a plan view showing an example of a food package using the bag mouth binding tape of the present invention. FIG. 5 is a plan view showing an example of a quick lock.

  The bag mouth binding tape of the present invention is used by being set in a fully automatic high-speed binding machine. Therefore, it is necessary to endure even when a large tension is suddenly applied. For these reasons, a biaxially stretched polyester film, for example, a biaxially stretched polyethylene naphthalate film or a polyethylene terephthalate film is preferably used as the tape substrate. The thickness of the film is preferably 30 to 38 μm. The tape width is the same as that of a normal adhesive tape and is 11 to 21 mm, preferably 15 to 20 mm, more preferably 16 to 19 mm.

  As shown in FIG. 1, the bag mouth binding tape of the present invention, that is, the adhesive tape 5, has a width of 0.5 to 1.5 mm, preferably 0.7 to 1.mm, from one end edge 6 in the width direction. A thin non-adhesive part 9 having a width of 2 mm and a thick non-adhesive part 10 having a width of 6.5 to 8.5 mm, preferably 7.0 to 8.0 mm from the other end edge 7 are provided in the longitudinal direction. An adhesive portion 8 is provided at the center between the two non-adhesive portions 9 and 10.

  The narrow non-adhesive portion 9 and the wide non-adhesive portion 10 contribute to preventing the adhesive from leaching out to the side surface of the wound adhesive tape. In a normal pressure-sensitive adhesive tape, since the pressure-sensitive adhesive leaches out from the edge of the tape, the side surface of the wound pressure-sensitive adhesive tape is always sticky. Therefore, in the distribution, it is necessary to avoid the phenomenon that the wound adhesive tapes stick to each other by always wrapping individually or sandwiching the interleaf paper between the wound adhesive tapes when stacked. Since the tape of the present invention has a non-adhesive part, that is, an adhesive non-applied part, there is no adhesion between the wound adhesive tapes, and there is no need to sandwich individual packages or slip sheets, which is very advantageous in terms of distribution. Even if the adhesive is present in part of the narrow non-adhesive portion 9 and the wide non-adhesive portion 10 due to the leaching of the adhesive, such a tape is included in the bag mouth binding tape of the present invention. Is done.

  Moreover, the thick non-adhesive part 10 also plays the role which makes peeling of an adhesive part easy. If the width is less than 6.5 mm, the finger cannot be inserted deeply when it is actually put in and peeled off, and it is difficult to remove it. If the width exceeds 8.5 mm, the width of the adhesive portion 8 is too small, and the predetermined adhesive It becomes difficult to obtain power.

  Here, a preferred method for producing the tape of the present invention will be described. As shown in FIG. 2, first, a plastic base material is prepared, and on one surface, adhesive portions having a predetermined width are formed in vertical stripes at predetermined intervals in the length direction of the raw material. Apply an adhesive. Thus, the adhesive part 8 which is an adhesive application part, and the part which the narrow non-adhesion part 9 and the wide non-adhesion part 10 which are adhesive non-application parts connected are formed. Next, the adhesive non-application part, which is 0.5 to 1.5 mm away from the adhesive application part edge (the part indicated by the arrow and the broken line in FIG. 2) is cut. Thereby, between the narrow non-adhesion part 9 of one adhesive tape and the wide non-adhesion part 10 of the tape adjacent to it is cut | disconnected. The adhesive tape having a predetermined width obtained in this way is wound around a paper tube.

  As another method for forming the non-adhesive portion, first, a tape having an adhesive applied to the whole of one surface thereof is manufactured, and the edge portions on both sides of the tape are mechanically folded inside. The method of returning is mentioned. The folded part becomes a non-adhesive part. In addition, as a method for forming the non-adhesive part, an adhesive composition containing a chemical that cures by ultraviolet rays is applied to the entire surface of one side of the plastic substrate, and then the ultraviolet ray is applied only to the part that should be the non-adhesive part. There is also a method in which the drug is cured and the adhesiveness is lost by irradiation. Further, there is a method in which a pressure-sensitive adhesive is applied to the entire surface of one side of the plastic substrate, and then a material that loses the adhesive force, such as ink, silica powder, or talc, is applied to a portion to be a non-adhesive portion. Any of these methods can be used in the production of the pressure-sensitive adhesive tape of the present invention.

  The pressure-sensitive adhesive tape of the present invention is used for the purpose of gluing in order to maintain the squeezed state of the place where the plastic bag is squeezed. The process of squeezing the plastic bag and gluing the adhesive tape to the part is performed at high speed. Therefore, it cannot be held for a long time after sticking the adhesive tape. Assuming that 60 bags are processed in 1 minute, the time for contacting and pressing the adhesives of the adhesive tape is 1 second or less. Therefore, the adhesive part of the pressure-sensitive adhesive tape of the present invention has an adhesive strength expressed by a peel adhesive strength (method: T-type peel method in accordance with JIS Z 0237) immediately after the sticking (measurement is 5 seconds after the sticking). An adhesive having a width of 3.75 to 5.10 N / 8 mm, preferably 3.95 to 5.00 N / 8 mm, more preferably 4.10 to 4.90 N / 8 mm is used. When the peel adhesion strength is less than 3.75 N / 8 mm width, a sufficient bundling state may not be maintained due to the resilience of the plastic bag after the palm bag is bonded so as to bind the plastic bag. On the other hand, when the width exceeds 5.10 N / 8 mm, it is difficult to peel off the adhesive tape.

  The pressure-sensitive adhesive has a pressure-sensitive adhesive strength represented by a peel adhesive strength (method: T-type peel method in accordance with JIS Z 0237) when the customer opens (measurement is 5 days after the pressure-sensitive adhesive) is 4.00. It is also necessary to have a width of 6.00 N / 8 mm, preferably 4.20 to 5.80 N / 8 mm, more preferably 4.50 to 5.50 N / 8 mm. When it is outside this range, it is somewhat difficult to peel off the adhesive tape. Furthermore, the pressure-sensitive adhesive preferably has a pressure-sensitive adhesive strength expressed by a peel adhesion strength (method: T-type peel method conforming to JIS Z 0237) after 3 days, preferably 3.85 to 5.50 N / 8 mm width, More preferably, the width is 4.00 to 5.30 N / 8 mm.

  In the present invention, the adhesive strength is based on JIS Z 0237 at 23 ° C. (room temperature) and a relative humidity of 50%, and the width of the adhesive portion is 8 mm (or converted to 8 mm). It was expressed by peel adhesion strength measured by the T-type peel method. The method is as follows. First, the pressure-sensitive adhesive tape (the width of the pressure-sensitive adhesive portion is 8 mm) is unwound to a certain length and cut, and then folded back at half the length to adhere the pressure-sensitive adhesive portions to each other. At this time, both ends in the length direction of the adhesive tape are not adhered. Thereafter, a 2 kgf rubber roll is reciprocated once on the adhered tape to be pressure-bonded. Immediately after the pressure bonding, as shown in FIG. 3, both ends of the adhered tape in the length direction are each fixed to Tensilon (universal tensile testing machine). The center in the length direction (folded part) is held by Tensilon so that the adhered part of the adhesive tape is vertical. At the speed of 300 mm / min, the left and right sides are pulled and peeled at the same speed in the direction of the arrow in FIG.

(Example 1) Test using a commercially available pressure-sensitive adhesive (1) Measurement of peel adhesive strength A commercially available adhesive was made of a biaxially stretched polyethylene terephthalate film (thickness: 30 μm; width: 8 mm; length: 20 cm). On one side, it was applied at a thickness of 20 μm to obtain an adhesive tape. Under the conditions of 23 ° C. (room temperature) and 50% relative humidity, the adhesive portions were folded back so that the adhesive-coated surface was inside at a half of the film length. At this time, both ends in the length direction of the adhesive tape were not adhered. Thereafter, a 2 kgf rubber roll was reciprocated once on the adhered tape to cause pressure bonding to obtain a test piece. Immediately after the pressure bonding, as shown in FIG. 3, both ends of the pressure-sensitive adhesive tape that were not adhered were fixed to the tensilon, and the folded portion was held by the tensilon, thereby making the test piece T-shaped. Five seconds after the end of the crimping, the film was pulled and peeled in the direction of the arrow in FIG. 3 at a speed of 300 mm / min (at this time, the folded portion was raised), and the force required at that time was measured. Further, after the same pressure bonding, the film was allowed to stand for 3 days (72 hours) or 5 days (120 hours) under conditions of 23 ° C. (room temperature) and relative humidity of 50%, and the peel adhesion strength was measured by the same method. . The results are shown in Table 1.

(2) Test for bundling property and hand peeling property As shown in FIG. 2, while keeping a rolled biaxially stretched polyethylene terephthalate film having a width of 1000 mm and a thickness of 35 μm, an interval of 8 mm was maintained in the form of vertical stripes. The adhesive was applied with a width of 8 mm and a thickness of 20 μm. After the adhesive was dried, the film was wound again. Next, cutting was performed at the position indicated by the arrow in FIG. 2, that is, at a position 1 mm away from the edge of the adhesive application part (adhesive part) 8, and wound around a paper tube as an adhesive tape 5 having a width of 16 mm. 60 wound adhesive tapes 5 having a 7 mm wide non-adhesive portion 10, an 8 mm wide adhesive portion 8, and a 1 mm wide narrow non-adhesive portion 9 were obtained.

  Using an automatic bag making and filling machine, five butter rolls 11 were accommodated in a plastic pillow bag 12 43 cm long and 20 cm wide and sealed. The butter roll 11 gathered at the bottom of the bag, and apparently more than half of the inner volume of the bag was space. About 1/3 from the top in the length direction of the space was bound while unwinding the wound adhesive tape 5 of the present invention using an automatic binding machine. The state after binding is shown in FIG.

Table 1 shows the results of observation of the bound portion the next day. Peeling of the binding portion due to the elastic force of the pillow bag material, specifically, the portion where the adhesive tapes are adhesively bonded to each other, was observed in the tapes using adhesives F and H with low adhesive strength. Further, Table 1 also shows the hand peelability when a finger is inserted into the thick non-adhesive portion 10 of the adhesive tape 5 and the tape 5 is removed after 5 days . In addition, the horizontal sealing part 13 of the pillow bag 12 could also be opened by hand. The two butter rolls 11 were taken out, and then the pillow bag was squeezed by hand in the vicinity of the butter rolls 11 to be shrunk and bound again using the same adhesive tape 5. In the pressure-sensitive adhesive tape using the pressure-sensitive adhesive that satisfies the requirements of the present invention, the adhesion and peeling could be smoothly repeated up to 5 times.

DESCRIPTION OF SYMBOLS 1 Small piece 2 Diaphragm hole 3 Slit 4 Leg 5 Adhesive tape 6 One edge 7 The other edge 8 Adhesive part 9 Narrow non-adhesive part 10 Thick non-adhesive part 11 Butter roll 12 Pillow bag 13 Horizontal sealing part

Claims (6)

An adhesive tape having a width of 11 to 21 mm, a non-adhesive portion having a width of 0.5 to 1.5 mm from one end in the width direction, and a non-adhesive having a width of 6.5 to 8.5 mm from the other end Each part in the longitudinal direction, and there is an adhesive part between two non-adhesive parts. The adhesive strength of the adhesive of the adhesive part is measured by a T-type peeling method in accordance with JIS Z 0237, 5 seconds after adhering the parts to each other with a 3.75 to 5.10 N / 8 mm width, and 5 days after adhering the adhesive parts to each other with a 4.00 to 6.00 N / 8 mm width peel adhesion strength. A tape for binding the mouth of a food bag. 2. The bag mouth bundling tape for food bags according to claim 1, wherein the non-adhesive part is formed by not applying an adhesive. The peel adhesion strength after 3 days when the adhesive parts are adhered to each other is 3.85 to 5.50 N / 8 mm width as measured by a T-type peel method in accordance with JIS Z 0237. A tape for binding bag mouths of food bags according to claim 1 or claim 2. The tape for bundling a food bag according to any one of claims 1 to 3, wherein the base film of the adhesive tape is a biaxially stretched polyester film having a thickness of 30 to 38 µm. The tape mouth bundling tape for a food bag according to any one of claims 1 to 4, wherein the tape has a width of 15 to 20 mm. On one surface of the original plastic substrate, adhesive application portions having a constant width are provided in vertical stripes at regular intervals, and are non-adhesive parts that are 0.5 to 1. The raw material is cut at a position that is 5 mm away and the width of the cut tape is 11 to 21 mm, and the cut tape is wound around a paper tube, respectively. Item 6. A method for producing a tape for binding a bag mouth of a food bag according to any one of Items 5 to 6.

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