JPH01267138A - Method and apparatus for attaching opening thread to packing film in tape form - Google Patents

Abstract

PURPOSE:To improve operability, by attaching a single or twisted thread made up of a plurality of crimped or uncrimped thermoplastic fibers on one side of thermoplastic resin film in a predetermined width and flat form by an ultrasonic or high frequency sealing method. CONSTITUTION:The opening thread 30 formed by an ultrasonic sealer 10 to 180 deniers in total is continuously attached to one side of film strapping 2b (inside of the film after packing) at an attaching speed of 40m/min., an ultrasonic frequency of 27,000 hertz and a pressure of 2kg/cm<2> in this embodiment and the opening thread 30 after attachment thereto is flattened into a tape- shaped opening thread 4. Behind the ultrasonic sealer, a sensor 20 (photosensor using optical fiber) is provided for detecting the breakage of the tape-shaped opening thread. The film strapping 2b with the tape-shaped opening thread 4 is placed in an online packing operation through a guide roll and normally fed into an automatic wrapping machine for use in the packing of cigarettes, a carton containing chocolates, etc.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a heat insulator inside a package mainly applied to overwrap packaging (hereinafter referred to as a film package) to make it easier to open the package. The present invention relates to a method and an apparatus for adhering a thread made of plastic varnish to a synthetic resin packaging film in the form of a flat tape using an ultrasonic sealing device or a high-frequency sealing device during or before packaging a product.

[Prior Art and Problems to be Solved] Luxury goods such as cigarettes or confectionery such as chocolates in cartons are generally packaged individually or in groups using transparent synthetic resin films (hereinafter referred to as This is done with the aim of not only protecting the contents but also adding cosmetic properties to the product, thereby stimulating demand. For the convenience of opening these film packages and taking out the products inside, a cut tape is generally attached to the film so that the film can be easily opened.

However, these cut tapes (also called tear tapes) are: - Made of polyester, moisture-proof cellophane film, etc., coated or laminated with Botmelt adhesive or pressure-sensitive adhesive on one side of this film, and - Slitter. Currently, the raw material film is converted into a tape form through the above-mentioned processing steps, in which it is cut into a predetermined narrow width, and then supplied as a product. For this reason, the price of force tape has increased, and there has been a demand for an inexpensive alternative product that is easy to attach to packaging films.

The outline of the present invention is that instead of using the cut tape described above, a crimped or non-crimped yarn made of thermoplastic fiber is used as a material, and the crimped yarn or non-crimped yarn is applied to the surface of the packaging film using an ultrasonic sealing device or a high-frequency sealing device. In this method, the packaging film is a shrink film, the unsealing thread is composed of a crimped thread, and a horamelt adhesive is used as a means for bonding the two together. Regarding, the inventors:
Previously, a proposal was made as shown in Japanese Patent Application Laid-Open No. 62-28354. However, as a result of imitation research and development, the method of adhering the unsealing thread to the shrink film using a Hola 1-melt adhesive, etc., as shown in the prior art, has been found to be a process of applying an adhesive or a coating process. It has been found that this is a bottleneck in increasing the operating speed because a separate device must be added and the adhesive must be cooled once after being applied. In addition, there are problems such as the above-mentioned adhesive staining the Sakura machine, separation of the opening thread from the film due to the melting of the adhesive during the heating process during heat sealing, and staining of the packaged items. Therefore, it was not a satisfactory method in terms of operability.

"Means for Solving the Problems" Here, the present invention provides a method for bonding an opening thread for opening a film package to one side of a thermoplastic resin film, and a method for bonding a crimped or non-crimped thermoplastic fiber thread. A single yarn or a plied yarn made by converging multiple yarns is used as the material for the unsealing yarn, and this material is coated on one side of a thermoplastic resin film with super-g
This problem is solved by using a wave sealing method or a high frequency sealing method to adhere the adhesives in a flat manner with a constant width.

Examples of the packaging film used in the present invention include known monoaxially or biaxially stretched thermoplastic resin films such as polyethylene, polypropylene, polyester, polyvinyl chloride, polyvinylidene chloride, and moisture-proof cellophane.

These films are often used to wrap the product in an overwrapping style after adhering the opening thread, but in that case, after wrapping the product, the seam of the film is For heat sealing, it is desirable that at least one side of the film has heat sealability.

As the material for the unsealing thread used in the present invention, thermoplastic synthetic fibers such as polyethylene, polypropylene, polyester, nylon, or polyvinyl alcohol, or sheath-core type thermoplastic conjugate fibers are used, and the thread itself contains at least a single fiber. It is a single yarn or twisted yarn of staples and/or filaments made of crimped or non-crimped yarns made by converging 20 to 150 of the thermoplastic fibers having a fiber thickness of 2 to 10 deniers. The crimped yarn is a so-called crimped yarn in which the 11ft bundle of 20 to 150 yarns is twisted left and right many times at high speed. For non-crimped yarn, refer to 2 above.
The IIN bundle of 0 to 150 bundles is not crimped. Both crimped and non-crimped yarns are used in the present invention after twisting a plurality of m string bundles (30 to 500 times/m). On the other hand, crimped yarn is obtained by twisting the bundle of fibers converged as described above many times to the left and right to perform a so-called crimping process. Refers to unprocessed thread.

In the present invention, by twisting or crimping the convergent yarn as described above, the apparent thickness is made thicker than that of a mere convergent yarn. Alternatively, by applying high-frequency sealing, the points of contact between the mtlfi constituting the yarn and the points of contact between the fiber and the film are held flat while being in a discontinuous dot-like adhesive state. Note that the flat state of the unsealing thread can be changed by adjusting the pressing force of the welding horn or the welding roller in the ultrasonic sealing device or the high-frequency sealing device.

In the present invention, as described above, various synthetic resin films can be used as the packaging film, and threads made of various thermoplastic m fibers can be used as the unsealing thread. Considering the compatibility, the following combinations are preferred.

For example, it is preferable to use the same type of synthetic resin constituting the packaging film and the thermoplastic m-fiber resin constituting the thread, and the following combination of film and thread is preferable.

Film Composite fiber consisting of polyvinyl chloride sheath and polyester core Polyvinylidene chloride Same as above Moisture-proof cellophane Same as above 1 Composite fiber consisting of polyethylene sheath and polypolyethylene propylene core Ultrasonic sealing method used in the present invention or The high-frequency sealing method can basically use a commonly known ultrasonic sealing device or high-frequency sealing device, but in the present invention, at least a welding horn or a welding force adjustment mechanism and a sliding mechanism are provided. is necessary.

The reason why the present invention particularly employs the ultrasonic sealing method or the high frequency sealing method is that the thread made of thermoplastic fibers is bonded to the packaging film and made into a tape by welding the thread to the film using ultrasonic waves or high frequency waves. However, by adjusting the pressing force of ultrasonic or high frequency waves and increasing or decreasing the frequency, the width of the tape-shaped unsealing thread after bonding can be freely adjusted by adjusting the thickness of the thread.

The width of the tape-shaped unsealing thread adhered in a flat shape according to the present invention can be adjusted to a desired width by adjusting the thickness of the thread and the pressure and frequency of the ultrasonic or high-frequency sealing device as described above. However, it is practically possible to have an IJIR of 0.1 to 5 IJIR, and it can have the same width, shape, and appearance as conventional tear tape.

For example, a narrow width can be obtained with a crimped thread of 50 denier and a width of 0.51M, while a wide width can be obtained by increasing the pressure of the sealing device with a total thread thickness of 360 denier. Up to 5#ll11 can be obtained.

In addition, conventional tear tapes are usually colored, but in the present invention, the desired coloring agent is kneaded or dyed into the threads of the material, without printing.
It can be glued as a tape-like opening thread of various colors, and when twisting multiple convergent threads together, if you twist threads of different colors together, you can create various combinations such as red and white, blue and green, etc. The tape-like opening thread can have a pattern of mixed colors.

In addition, when the tape-shaped opening thread contains gold wire or silver wire, by layering a thin thread colored gold or silver on top of the thick thread and adhering it to the film, it is possible to obtain the desired width of gold wire or silver wire. It can be made into a tape-like opening system with wires or silver wires.

Furthermore, the method and apparatus of the present invention are characterized in that when the thread is bonded to the film by ultrasonic sealing or high-frequency sealing apparatus,
By sliding the welding bone or the welding roller and its receiving roller of the sealing device from side to side, it is possible to bond the film surface in a wavy, equicurvilinear shape, and it is also possible to obtain a curved opening tape.

[Examples] A method and an apparatus for adhering yarn to a packaging film in the form of a tape will be explained in detail with reference to Examples.

The opening thread used in the present invention is schematically illustrated in FIG. 1, and the opening thread 30 is made by twisting fiber bundles 31a and 31b. For example, polypropylene is used as a raw material, and 30 fiber bundles 31a are spun through a spinning nozzle.
, 31b is melt-spun into a single fiber having a thickness of 3 denier.

The fiber bundles 31a and 31b shown in FIG. 2A are twisted 3000 times on each side to perform a so-called crimping process. These two bundles are twisted an additional 100 times, and when they are combined, 60 single J[ are combined, and the twisted yarn is 3
0 is obtained. In this case, the total thickness of the threads is 180 denier. Incidentally, it is of course possible to converge single fibers that have been crimped at the same time as they are spun from the nozzle. Further, the material 11 may be in the form of continuous long fibers, or may be made into staple fibers by cutting spun fibers into appropriate lengths.

FIG. 2B schematically shows fiber bundles 31a and 31b using heat-adhesive composite fibers with a sheath-core type structure as single fibers. For example, the sheath is made of polyethylene and the core is made of polypropylene or polyester. , the sheath is made of polyvinyl chloride and the other core is made of polyester or the like. However, when threads made of these fibers are welded using ultrasonic waves or high frequency waves, the resins in the low melting point sheath weld together and become flat, while the resin in the high melting point core forms a flat thread. As a result, a strong tape-like opening thread can be obtained.

FIG. 3 shows that a tear-open thread made of thermoplastic VA material of the present invention is flatly adhered to a packaging film to form a tape, and an article (commodity) is wrapped in the film with the tape-like tear thread. This figure shows the processing steps for producing a film package; in other words, it shows a case in which a device for adhering the opening thread of the present invention to a film in the form of a tape is incorporated into an automatic overwrapper.

In FIG. 3, as an example, a strip-shaped polypropylene film 2b (which has been given heat-sealing properties in advance) with a thickness of 20 μIrL is pulled out from the film winding 2a, and on the other hand, the film is welded to the surface of the film. opening thread 3
0 is fed out from the bobbin 34 at a circumferential speed with the film, and both are guided to the ultrasonic sealing device @10, which constitutes the main part of the present invention, and are combined. Incidentally, the unsealing thread 30 is introduced into the sealing device while being maintained in a very loose tension state via the tension controller 35 shown in the drawing at the front stage of the sealing device. In addition, in order to let out the unsealing yarn at the peripheral speed of the film, it is preferable to install a forced pay-out roll that is interlocked with the film drive unit in front of the tension controller 35.

The details of the ultrasonic sealing device 10 and the bonding mode thereof will be described later, but the device 10 is used to attach the unsealing thread 30 having a total thickness of 180 deniers to the strip film 2.
It is continuously adhered so as to be located on one side of b (on the inside of the film after wrapping the film). An example of the bonding conditions is that the bonding speed is 40 TrL/min, the ultrasonic frequency is 27000 Hz, and the pressure is 2 K9/ci, and the thread 30 after bonding is flattened to form a tape-like opening thread 4.
becomes. A sensor (optical sensor using optical fiber) S is installed after the ultrasonic sealing device to detect the tape-shaped unsealing thread and detect thread breakage.

The strip-shaped film 2b to which the tape-shaped opening thread 4 is attached is
After passing through the guide roll, there is usually a cigarette,
It enters the overwrap 1a20, which is an automatic packaging machine used for cartons of chocolate and the like. That is, the notch cutter 70a and cutter 70a which form the cut end use the blade 70b to form a mouth-shaped countersink 5a and a notch 5b corresponding to the cut around the tape-shaped opening thread 4, and in this way, the cut end is formed. The film is transferred to the film feed roll 7181.
It is sent to the cutter device via 71b. The cutter device consists of a rotary blade 728 and a rotary blade 72b, and after cutting the film into the length necessary for packaging the product in a direction perpendicular to the flow of the film, the cutter device further cuts the film into the length required for packaging the product through the process described later. The product 3 is operated so as to be wrapped in the packaging film 2b. That is, as shown by reference numerals 60 and 61 in the figure, after wrapping the product 3 in the film 2 and attaching it to the body while inverting it 180 degrees, the top and bottom are further folded and heat-sealed. This is to obtain a film package 1 having the following features. Note that as the film, it is possible to use a film that can be heat-sealed at a relatively low temperature of about 110 to 150°C.

The film package 1 constructed as described above is shown in an enlarged scale in FIG. As is clear from the figure, the product 3 is packaged with the packaging film 2 with the top, bottom, and sides of the body heat-sealed, and a tape-like opening string 4 is provided with a hook 5a to make opening the package easier. Since the packaging film 2 is adhered to the inner surface of the packaging film 2, the packaging film 2 is configured so that it can be easily opened by pinching this part with your fingers.

Next, the ultrasonic sealing device used in the present invention (the part indicated by the reference numeral 10 in FIG. 3) and the method of bonding threads to form a tear tape using the same device will be explained.

FIG. 5A is a side view showing the entire ultrasonic sealing device 10 of the present invention, and FIG. 5B is a front view of the right device viewed from the right side.

The overall configuration of the device is as follows: In the figure, the film 2b runs horizontally.
The welding horn part 10a is attached to the upper part of the film 2b, and the roller part 10b is the receiver located below the film 2b.The upper welding bone part is connected to the oscillator 41 fixed to the machine frame 40 and the roller part 10b. It consists of a welding horn 42 attached to the lower surface of an oscillator 41, and the machine frame 40 is attached so that it can be pressurized downward by, for example, an air cylinder 43. Further, the entire upper device including the air cylinder 43 is attached via a support frame 44 so as to be able to slide in the lateral direction (perpendicular to the running direction of the strip film 2b). That is, the support frame 44 is suspended loosely on the fixed guide rod 45, and the support frame 44 is suspended from the fixed guide rod 45.
．． When the operating handle 46a (indicated by a chain line in the figure), which is attached to the machine frame 44 so as to be screwed together with the threaded rod 46 provided between the machine frames 45 and 45, is rotated, the machine The entire frame 44 can be moved to the right or left via a screw rod 46.

Next, the receiving roller part located at the lower part of the welding horn part 10a will be specifically explained based on FIGS. 6A and 6B.

A receiving roller 47 is provided on the lower surface of the welding horn 42 so as to face the horn, and this receiving roller 47 is attached to a fixed shaft 51 by a screw 52 so as to be movable in the longitudinal direction of the shaft. On the other hand, on the circumferential surface of the receiving roller 47, a pair of clamp members 50a,
A thread guider 50 consisting of 50b is incorporated.

That is, the upper side of each clamp member has a semicircular curved surface 50c corresponding to the circumferential surface of the receiving roller 47, 5.
0c are formed to face each other, and the thread guider is mounted so that the receiving roller 47 is sandwiched between these curved surfaces. Further, the clamp members 50a, 65
Blind holes 50d and 50 are provided on each proximal end side of 0b.
d to face each other, and one common coil spring 55 is inserted into this hole. Furthermore, a set screw 54 is attached to the center of each of the clamp members 50a and 50b for setting these pair of members together, and when installing, as shown in FIG. 6C, one clamp member is 50a has a through hole 50e having a diameter large enough for the screw to loosely fit therein, and the other clamp member 50b has a screw hole 5 into which the set screw 54 is screwed.
0f are formed respectively, and the set screw 5 is inserted so as to pass through the through hole 50e and the screw hole 50f.
Screw on 4. In this case, when the screw 54 is strongly tightened, both the clamp members approach each other against the elasticity of the coil spring 55, and are firmly gripped by the socket 547 through the curved surfaces of the members. On the other hand,
When the set screw 54 is loosened, both clamp members 50a,
50b move away from each other due to the elasticity of the spring 55, thereby making it easy to change the position of the clamp member relative to the receiving roller 47 or to remove it.

A thread guide roller 36 for guiding the thread 30 guided from the thread bobbin 34 shown in FIG. A guide groove 53 for guiding the yarn 30 to the receiving roller surface is carved, and a cover plate 56 having a long hole 57 is moved in the left-right direction in FIG. 6A to cover this guide groove from above. Shikuq
It is attached in a semi-fixed state via a thumbscrew 58 so that it appears as shown in FIG.

The thread 30 that has been let out via the guide roller 36 passes through the guide groove 53 carved on the surface of the clamp member 50a and reaches the upper surface of the socket 547, where it passes through the welding horn 42. The film 2b is welded to the film 2b by the ultrasonic energy and pressing force, and becomes a tape-shaped opening thread 4 while being deformed into a flat shape. By the way, 11h cover plate 5
Reference numeral 6 denotes a stopper member that prevents the thread from coming off the guide groove, and when threading the thread, it is sufficient to loosen the medium screw 58 and shift the cover plate 5G laterally.

By the way, when threads are welded using ultrasonic sealing,
As a result, the surface of the receiving roller 47 wears out little by little, and especially if welding is repeated at the same location, the roller surface may be damaged, making it impossible to carry out the desired welding work. In the present invention, consideration is given to this point,
The thread guider 50, which is the clamping member, can be moved in the axial direction of the openings on the circumferential surface of the receiving roller to prevent welding from occurring frequently at the same location. It is. As already mentioned, the welding horn 42 can also be moved in the same direction as the system guider is moved. Incidentally, when moving the thread guider 50 in the axial direction, first loosen the set screw 54. In such a case, as described above, the elasticity of the spring 55 acts to cause the clamps 50a and 50b forming the guider to move toward each other in the direction of opening. By grasping the Wf'A side of the clamp by hand, the spring 55 contracts, and the upper sides of both clamps open in a V-shape (see FIG. 6C). In this way, the thread guider can be easily moved.

The bonding conditions for bonding uncrimped or crimped yarn made of thermoplastic fibers in the form of a tape to a strip film using the ultrasonic sealing device of the present invention include the thickness of the yarn, the temperature of the material of the yarn, Although it varies depending on the type of plastic fiber or adhesion speed,
The amplitude of the ultrasonic wave is 20 to 50 μm, and the number of amplitudes is 15,000.
~30000 Hz/sec, pressure 1.5~3 Kg/
By applying ctA, the thread can be melted, flattened, and welded to the film surface in the form of a tape.

The speed of the film and the speed of feeding the yarn must be the same, and when feeding the yarn, a forced feed roll derived from the drive of the film is used to make the speed of the yarn and the speed of the film the same as the peripheral speed. preferable.

In addition, if too much tension is applied to the thread, it will break during gluing, so the tension is controlled using a tension controller.
It is necessary to feed the yarn to the receiving roller 47 while applying a certain amount of tension so that there is no slack.

The adhesion speed can be varied, but it is 5 to 100 m.
/ minute.

The embodiment shown in FIGS. 7 and 8 is based on the ultrasonic sealing device 1 described above.
This figure shows a case where a high frequency sealing device is used instead of 0, and the same members as in FIG. 5 are given the same reference numerals, and different members will be explained below.

The figure shows the welding horn 4 in the ultrasonic sealing device shown in Figure 5.
2 and the receiving roller 47. In both the high frequency sealing device and the ultrasonic sealing device, the device centering on the welding bone 42 and the receiving roller 47 may be arranged upside down.

The roller indicated by the reference numeral 65 in FIG. 7 is a welding roller that forms one negative electrode, and forms the other positive electrode under the welding roller by sandwiching the thread 30 and the strip film 2b to be welded. A receiving roller 66 is attached.

It should be noted that each of the welding roller 65 and receiving roller 66 l1d67.68 is attached via an insulator 69, and a large number of fins 66a are formed protruding from the outer peripheral surface of the receiving roller 66. . Incidentally, numerals 63 and 64 are brushes or copper plates for conducting electricity.

The mechanisms of the ultrasonic sealing device and the high-frequency sealing device used in the present invention and the method thereof for adhering a tearing thread made of thermoplastic fibers to a packaging film in the form of a tape have been described above.

Here, the mechanism by which the unsealing thread made of thermoplastic fibers of the present invention is made into a flat tape shape by an ultrasonic sealing device or a high frequency sealing device will be schematically explained with reference to the drawings.

As shown in Figure 9, when the unsealing thread is adhered to the film in a flat shape using ultrasonic sealing, etc., the structure is such that the contact point A between the fibers that make up the thread and the contact point A between the fibers and the film are discontinuous. It remains flat and glued in dots. As shown in FIG. 10A, this flattening is achieved by increasing the pressure of the welding horn or the welding roller so that the yarn 30 before bonding is
It can be adhered to the film 2 in the flat state shown in FIG. 08, that is, in the form of a tape.

In addition, in the present invention, it is desirable to adopt a method of adhering a tape-shaped opening string to the film surface with a constant width. To this end, it is conceivable to provide the following adjustment mechanism in the ultrasonic sealing device, for example.

■The film running speed is linked to the ultrasonic frequency or amplitude conversion, and the ultrasonic power is controlled in response to changes in the film running speed, uniformly welding and flattening the thread, and creating a uniform width. It is made into a tape-like opening thread.

■The running speed of the film is linked to the pressing force of the welding horn of the ultrasonic sealing device, and the pressing force is controlled in response to changes in the running speed of the film, uniformly welding and flattening the thread, and maintaining a constant width. A tape-shaped opening thread is used.

■Maintaining a constant clearance between the end face of the welding horn of the ultrasonic sealing device and the film surface, and controlling the vertical width of the rock frame with an air cylinder that moves the welding horn up and down to uniformly weld and flatten the threads. It is made into a tape-like opening thread of a certain width.

As a result, it is possible to reduce losses due to fluctuations in the width of the tape-shaped opening thread when starting from a stop to starting or from starting to a stop.

[Effects of the Invention] When the unsealing thread of the present invention is adhered in the form of a tape to the overwrap packaging film, the following effects can be achieved.

B) Like conventional cut tape (tear tape), printing, adhesive coating, narrow width I! Since the 7i cutting process is not required and the thermoplastic mH thread is directly adhered to the packaging film in the form of a tape, a packaging film similar to the packaging film with conventional tear tape adhered can be obtained through a simple process. This can result in significant cost reductions.

By selecting a combination of the resin composition of the thermoplastic resin film for packaging (q) and the thread consisting of thermoplastic fibers (t), the adhesion between the film and the opening thread is excellent. When a thread of plastic composite fiber is used, a tape-shaped opening thread with good strength can be obtained.

When using the device for adhering the opening thread of the present invention to a packaging film in the form of a tape, the following effects are achieved.

(1) By increasing the pressure of the welding horn or welding roller of the ultrasonic sealing device or high-frequency sealing device, the thread made of thermoplastic llff is flatly attached to the packaging film.
j1°, and can be made into a convex thread with a desired width.

(2) In the ultrasonic sealing device or the high frequency sealing device, the device portion including the welding horn or the welding roller is equipped with at least a calendar movable side for adjusting the positions of the respective members. In addition to being able to adhere the thread to the film in a straight line, if it is constantly slid by a motor etc., it can be adhered in a curved shape with a constant width and flat, making it possible to bond the thread to the film in a tape-like opening thread.
I can do that.

c3+ The receiving roller in the ultrasonic sealing device of the present invention is:
Since the action area of the roller can be regulated positionally through the thread guider, which is movable in the axial direction, wear caused by welding of thread on the surface of the receiving roller is prevented from occurring on the entire circumference of the receiving roller. Distributed L'? Ill. As a result, it has the advantage of being durable for use between friends.

In addition, the thread guider is composed of a pair of clamp members, and can be moved on the receiving roller surface with a single touch by a set screw and a spring built into the members.
It can be easily removed and inspected in relation to the receiving roller.

(/I) The device of the present invention can be incorporated into packaging, bag making, film half-folding winding, or similar processing.
Depending on the manufacturing speed, the unsealing thread can be glued in the form of a tape.

The opening thread of the present invention has the following advantages.

(a) Unlike conventional cut tape, threads made of thermoplastic fibers are directly welded to the film to create a tape shape.
This eliminates the need for film printing, adhesive coating, and cutting into narrow widths, which are required to make conventional tapes, making it much cheaper. In addition, unlike conventional cummy tape, no adhesive is used to adhere to the film, so there is no need to worry about problems such as blocking, film shrinkage, or curling.

(b) When a tape-shaped opening thread needs to have a narrow width, the total denier can be reduced, and when a wide tape is needed, a thread with a larger total denier can be used, and the welding horn can be modified. By increasing the pressure to II, it is possible to freely obtain a tape-like opening thread with a width similar to that of conventional cut tapes.

(C) A tape-shaped unsealing thread with good adhesion and strength can be obtained by using a thread made of a sheath-core type heat-adhesive composite fiber as a single fiber made of two or more components of thermoplastic resin. .

(d) Conventional colored cut tapes were colored using a printing method, but the coloring of the unsealed yarn of the present invention is done by kneading a coloring agent into the material resin at the time of manufacturing the yarn, or Since the yarn is colored by dyeing, etc., if this colored yarn is used, a tape-shaped opening yarn with a pattern can be obtained by twisting yarns of a single color or different colors. Furthermore, by coloring thin threads with gold or silver, and superimposing them on thick colorless threads and gluing them together, it is possible to freely obtain tape-shaped opening threads containing gold or silver wires.

[Brief explanation of the drawing]

Fig. 1 is a plan view schematically showing a thread made of thermoplastic fiber which is the raw material for the unsealing thread of the present invention, Fig. 2A is an enlarged sectional view of the thread, and Fig. 2B is a thread made of thermoplastic composite fiber. 3 is a perspective view showing an example of an apparatus for manufacturing an overwrapping film package, and FIG. 4 is an enlarged view of the overwrapping film package manufactured in FIG. 3. FIG. 5A is a side view showing an example of a device for bonding film and threads using the ultrasonic sealing method, FIG. 5B is a right front view of the device, and FIG. 6A is a receiver of the ultrasonic sealing device. A side view of the roller support part, FIG. 6B is a front view of the same as above,
FIG. 6C is a sectional view of a part of the thread guider, FIG. 7 is a front view showing the high frequency welding device, and FIG. 8 is a side view of the same, with a part cut away. Figure 9 is a cross-sectional view showing the state where the unsealing thread is flattened;
M10Δ is an enlarged longitudinal cross-sectional view showing how the film and thread overlap, and FIG. 108 is an enlarged longitudinal cross-sectional view showing the tape-like state after being flattened by pressure. 1... Film packaging body, 2... Film, 3...
Item to be packaged, 4...17i! Sealing tape, 5a... Tightening, 5b... Notch, 10... Ultrasonic sealing device, 2
0... Thread breakage detection sensor, 30... Thread, 31813
1b... Convergence thread, 32... Sheath, 33... Core, 34
...Thread bobbin, 35...Tension controller,
36... Thread guide roller, 40... Machine frame, 41...
- Oscillator, 42... Welding horn, 43... Air cylinder, 44... Support frame, 45.48... Guide rod, 4
6... Screw, 46a... Operation handle, 47... Receiving roller, 50... Thread guider,
50a, sob...clamp member, 50C...curved surface, 50d...dead hole, 50e...through hole, 50
f...screw hole, 51...shaft, 52...screw, 53...guide groove, 54...set screw, 55...
Spring, 56... Cover plate, 57... Hole, 58... Thumb screw, 60... Body pasting folding heat sealing process, 61... Top and bottom folding heat sealing process, 6
3... Current-carrying brush, 64... Copper plate, 65... Welding roller, 66... Receiving roller, 66a... Fin, 6
7.68...Shaft, 69...Insulator, 70a...Notch cutter, 70b...Same receiver is blade, 71a, 7
1b...Film feeding roll, 72a...Film cutter, 72b...The receiver is a blade. Fig. 1 Fig. 2A Fig. 2B Illustration Fig. 4 Fig. 5A Fig. 5B Fig. 6A Fig. 6B Fig. 6C Fig. 50a Fig. 7 Fig. 8 Fig. 9 Procedures 1n Official Book June 2, 1988

Claims (1)

[Scope of Claims] 1. A method for bonding an opening thread for opening a film package to one side of a thermoplastic resin film, in which a single unit in which a plurality of crimped or non-crimped threads of thermoplastic fibers are converged. A method for adhering an opening thread to a packaging film in the form of a tape, characterized by adhering a thread or twisted thread to one side of a thermoplastic resin film in the form of a flat tape using an ultrasonic sealing method or a high frequency sealing method. . 2. In an ultrasonic sealing device or high-frequency sealing device that adheres a tape-like opening thread for opening a film package to one side of a thermoplastic resin film, a welding horn or a welding roller and its receiving roller are used as a base. The opening thread is attached to the packaging film so as to be movable relative to the film in the width direction of the film, and the pressure force of the welding horn or the welding roller against the film surface can be adjusted via a cylinder. A device that adheres tape-like adhesives. 3. In an ultrasonic sealing device in which an opening thread for opening a film package is bonded in the form of a tape to one side of a thermoplastic resin film, an ultrasonic sealing device capable of sliding on the circumferential surface of a receiving roller in the device in the axial direction of the roller. 3. The apparatus for bonding an opening thread to a packaging film in the form of a tape according to claim 2, further comprising a thread guider having the structure shown in FIG. 4 A thread guider is constituted by a pair of clamp members facing each other, and the proximal ends of the two members are always held in a tendency to separate by a spring, while a set screw is loosely fitted into one of the two members. 4. The opening thread according to claim 3, wherein a hole is provided, and a hole into which the set screw is screwed is formed on the other side, and the clamp member is set so that the clamp member can be expanded by the set screw. A device that adheres tape to film. 5. Claim 1 which is a staple and/or filament single yarn or plied twisted yarn consisting of a crimped or non-crimped yarn in which 20 to 150 thermoplastic fibers each having a single fiber thickness of 2 to 10 deniers are converged. A tearing thread used in the method described above for adhering the tearing thread to a packaging film in the form of a tape. 6. The opening yarn according to claim 5, wherein the resin component constituting the single fiber is a thermoplastic fiber having one component or a thermoplastic conjugate fiber comprising a plurality of resin components.