JPS62235154A - Manufacture of rollstock of plastic film sack for packaging - Google Patents

Abstract

PURPOSE:To obtain a rollstock of film sacks for packaging by performing multi-face printing so that images in a plurality of types appear on a inflation film tube at intervals corresponding to the sack height, and providing transverse seal and perforation. CONSTITUTION:Resin which has fused with rotation of a screw 4, is extruded upward from a ring die 5 and pulled by a nip roll 6. Air is blown in from an air supply pipe 7, and each inflation film tube 1 thus formed undergoes printing of images by a printing roll 8, whereon images A, B... in different figures are allocated at intervals according to the sack height, together with printing of a regi. mark M in the seal cut position. A sensor 12 senses the mark M, and a seal cutter 10 situated downstream provides seal and perforation, and thus rollstock is made by a winder 10. Thus a rollstock of plastic film sacks for packaging is obtained, whereon images in different figures appear repeatedly.

Description

[Detailed Description of the Invention] Technical Field> The present invention is characterized in that a blown film tube is rolled up with horizontal thermal seals and perforated cuts at regular intervals, and when separated from the perforated cuts, it becomes a bag. This invention relates to a method for manufacturing a rolled layered body of a plastic film bag for packaging, in which several to more than ten types of images printed on the bag repeatedly appear as the rolled layered body is pulled out.

<Background of the Invention> There are many advertising media such as television, radio, newspapers, insert advertisements, magazines, weekly magazines, and pamphlets, but in recent years, the amount of advertising handled by these media has reached its limit.

Therefore, there is a demand for the development of new media, and the development of advanced technology industries such as personal computer communication, advanced information communication, satellite communication broadcasting, and Capten systems is also eagerly awaited in the field of advertising.

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= - Vertical 1 + No 4 - Shi 1 B We focused on a rolled layered body of plastic film bags for packaging that is continuously produced by an inflation method.

That is, as the screw rotates, normally colorless and translucent resin is extruded through an upward ring die, pulled upwards, air is blown into it, and formed into a long blown film tube, and then guided downwards for printing. After that, a horizontal seal and a perforation-like cut are made, and the paper is graded into a diameter of 100 to 200 ma+, and it is torn off from the perforation-like cut.

This rolled layer is used, for example, to individually package products that are likely to drip when left in the food section of a department store or at the cash register of a supermarket, and because consumers bring home several or several bags, each bag is advertised. If the product is printed with local information and rolled up, it can be delivered to the food section of a department store or a supermarket, ensuring that it is delivered to the local residents who use the store, making for extremely powerful advertising.

However, examples of plastic film bags made of blown film tubes with advertisements or images printed on them include the handbags you receive at trade shows to hold pamphlets, and the images printed on such bags may include your company name or product. This was related to the promotion of the store, such as the name of the bag, and no specific company would print various images on individual bags and hand them out.

Plastic film bags for packaging are used to individually wrap products that are at risk of dripping and then put them into larger bags, so there is no need for printing and there are no examples of them being printed. When I tore it out from my eyes, a wide variety of images appeared one after another, and there was nothing that could be used to spread awareness of advertisements, etc.

This cannot be interpreted as a problem simply due to a lack of production.According to the general idea, each store consumes one to several rolls every day, and the printing From the perspective of the equipment, it is thought that this is due to the fact that only a single image can be printed.

In other words, multi-type printing, that is, multi-sided printing, is performed in the longitudinal direction of the roll surface, and endless multi-sided printing in the circumferential direction is not performed, which is impossible with current printing equipment. They do not think of printing many different types and using them as a means of advertising.

In addition, in general, food store managers, regardless of whether or not the products are displayed in their stores, are responsible for promoting the products of manufacturers (other companies). It is thought that there is reluctance due to concerns that consumers will stop visiting, as well as various other considerations.

Preconditions for this application> The inventor of the present invention has conducted various studies on the above-mentioned circumstances.

In order to make the roll of plastic film bags for packaging an effective means of advertising, several to more than ten types of images (A-J in the figure represent images) are repeatedly displayed, as shown in Figure 2. r printed on the bag.
An application was filed for utility model registration for packaging plastic applications.

<Object of the Invention> The present invention does not provide the above-mentioned plastic film bag for packaging, but rather provides a method for manufacturing a rolled layered body of a plastic film bag for packaging.

Means for Achieving the Purpose> As shown in FIG. 1, the method for manufacturing a rolled layered body of a plastic film bag for packaging according to the present invention is such that the circumferential length is several times to more than ten times the length of the bag to be manufactured. Printing is carried out on a blown film tube using a printing roll, which has a plate formed by distributing many types of images in the circumferential direction of the roll at a pitch equal to the length of the bag, on a large-diameter plain roll, and from several to more than ten types of images are printed on the blown film tube. Multi-sided printing is performed so that the image appears repeatedly, and horizontal seals are inserted at bag length intervals to divide each image of the printed blown film tube using a heat seal cutter, and perforation-like notches are inserted near the horizontal seals. Illusion + Dove Wine Gu

<Example> FIG. 1 shows an example of the method for manufacturing a rolled layered body of a plastic film bag for packaging according to the present invention.

The raw resin is melted and supplied to the ring die 5 by rotating the screw 4, and the resin is extruded upward from the ring die 5 and pulled upward by the nip roll 6.
Air is blown into the air supply pipe 7 connected to the side of the ring die 5, forming a long blown film tube.
'1 is formed L, the blown film tube 1 is guided downward from the nip roll 6, and multi-sided printing is performed by the printing roll 8. The printing roll 8 is a large diameter roll, and there is no such large roll in the past. The bag must be specially made, and therefore the printing machine must also be specially made. Various images (for example,
A printing roll 8 on which a printing plate is formed is manufactured by allocating printing rolls (images A-J shown in FIG. 1). In other words, the size of the plate roll is determined so that the circumference of the roll matches the number of images to be printed on each bag multiplied by the bag length, and the number of images is determined from several types to more than a dozen as desired. To prioritize the bag length and the number of images, for example, if the bag length is 20 cm and the image is a child type of A-J, prepare a plate roll with a roll diameter of 63.48 crs. Then, the plate is made so that the layer having a circumferential length of 20Oc is divided into ten equal parts and the images of the child types of AJ are laid out. When reusing a roll, since the circumference of the roll is fixed, the number of types of images is determined while considering the length of the bag, and the images are divided into equal parts around the circumference. After the images of the child types of A-J are printed in this way, they are dried in a dryer, and then the horizontal seals 2 and perforation-like cuts 3 shown in FIG. 11, 100-20
It is wound to a diameter of 0 mm.

A registration mark M is printed along with the image at the scheduled sticker cut position using the printing roll 8, and each time the registration mark M is detected by the registration mark sensor 12 installed at a position upstream of the sticker cut position, a registration mark M is printed at the downstream position. If the horizontal seal is inserted and cut, even if the blown film tube 1 stretches or slips between the seal cutter of the printing machine and the seal cutter, the seal cut position will not shift relative to the image, resulting in defective products. There is no danger.

The image may be expressed in various ways as characters, figures, symbols, colors, or combinations thereof, and is not limited to being printed as an advertisement for a company, product, or service. to those who
It also includes the case where various messages between consumers, local information, and mini-comic information are attached via a food store.

<Effects of the Invention> As explained above, the method for manufacturing a plastic film bag for packaging according to the present invention is as follows.

Printing is performed on the blown film tube using a printing roll with various images distributed in the circumferential direction to form a plate. The structure is such that horizontal seals (thermal seals) and perforations are placed at intervals to separate each image, and then the image is rolled up to the required size, so the initial purpose was to heat the blown film tube at regular intervals. The rolls are layered with horizontal seals and perforated cuts, and when you pull out the rolled layers that form the bag when separated from the perforated cuts, you will see several to more than a dozen different images printed on the six bags. It is possible to produce a rolled layered body of a plastic film bag for packaging that can be replaced.

[Brief explanation of drawings]

FIG. 1 is a schematic conceptual diagram of an embodiment of the method for manufacturing a rolled layered body of a plastic film bag for packaging according to the present invention. FIG. 2 shows a packaging film manufactured by the method of the present invention:
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In IT series 1-14, 1...inflated film tube, 2...Φ horizontal seal, 3...perforation cut, 8...printing roll, 10...sticker cutter, 11...wine goo , 12... Registration mark sensor, A-J-- Image, M eye, Registration mark,

Claims (2)

[Claims] (1) A plate is created by distributing various images in the roll circumferential direction at a pitch of the bag length on a large diameter plain roll whose circumference length is several to ten times as large as the length of the bag to be manufactured. The formed printing roll is used to print on the blown film tube, and after making horizontal seals (heat seals) and perforation-like cuts at bag length intervals to separate each image, the tube is rolled up to the required size. A method for producing a rolled layered body of a plastic film bag for packaging, characterized by: (2) A registration mark is printed along with the image using the printing roll, and each time this registration mark is detected by a registration mark sensor installed at a position upstream of the sticker cut position, a horizontal sticker is inserted at the downstream position and 2. A method for producing a rolled layered body of a plastic film bag for packaging according to claim 1, which comprises cutting.