JPS59501582A - A plastic material film sheet having a preselected weakened area, a method for manufacturing the same, and a package made therefrom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Plastic material film sheet with preselected weakened areas and its manufacture METHODS AND PACKAGES MADE THEREFROM The present invention generally describes packaging containers and packages made therefrom. New and useful improvements in the manufacture of packaging for food, chemical and medical products. Rapidly rupturable seals that are particularly suitable for making packages for supplies, etc., and that can be ruptured The present invention relates to a plastic material film sheet having a plastic material film sheet.

The present invention is particularly suitable for packages in which two or more chambers are separated by a rupturable seal. At least one of the two substances is mixed through the seal inside the package. It will be done. This general type of package is described in my U.S. Pat. No. 3.608, No. 709.

To form part of the seal as a pre-selected weakened area, select an area that is weaker than other areas. It has heretofore been necessary to bond two films together with an adhesive. this Such a film is not only difficult to produce, but also requires close contact surrounding the weakened area. The strength of the joint was also not fully predicted.

According to the invention, heat 2 with resist in local areas It is proposed to provide a single sheet of plasticizer itself, which resists the above-mentioned series. Divide the whole middle part into two separate layers of the same material and separate the two. The layers do not come together at bond 1- at a later date due to the presence of the resist material. exchange In other words, a thermoplastic sheet made from two layers (the same part off) is The body is self-bonded and for all practical purposes is a single layer material. Ru.

Accordingly, in one embodiment, the present invention provides for the complete construction of a package having a rupturable seal. It provides a thermoplastic material film sheet especially suitable for making the sheet. is a predetermined seal forming area and the above-mentioned sheet that almost coincides in position with the seal forming area. and an internal resist material within the seal forming area, the resist material being an internal resist material within the seal forming area. Reduce the effective thickness of the sheet and define a preselected weakened area with two surface areas. and only one surface part of the sheet can be torn; , the entire thickness is torn, and no part of the thickness is torn. Features of the invention The point is that the film sheet described in item 1 is composed of at least two sheets of the same thermoplastic material. consisting only of a film, with both films excluding the above-mentioned predetermined seal forming area. It is self-adhered by heat so that it becomes an integral, unitary structure.

°1i table Showa 5a-501582 (3) In U.S. Pat. No. 3,608,709, sheets of thermoplastic material are laminated sheets. the two layers are composed entirely of a single-thickness material except for areas of resist material. For example, they were not bonded together by melting or welding. US Patent No. On the gold side of No. 3.608.709, the two layers of the laminated sheet must be joined with adhesive. I had to. Adhesives (adhesives) tend to peel off, so On one side or both sides of the resist material, the laminated sheets are continuously separated. Unfortunately, I couldn't open it.

The invention is of particular importance in the context of food packaging, where two types of food packaging are concerned. The items are housed in a single bagge adjacent compartments separated by rupturable seals; When the seal is broken, food moves from one chamber to its adjacent chamber and actually enters the register. It will pass over the top material. Therefore, a preferred feature of the present invention is that the resist material The idea is to make oneself from food-grade materials.

The resist material itself may be food or (or be sufficiently compatible as a food additive) Ru. ! :, it may be one that is recognized.

The sheet material of the present invention includes a first film, and a pre-selected film of the first film. Allow the resist to fully adhere to the area, then apply a thinner second film to the first film. the second film over all areas except those with resist material. It can be produced by bonding the first film IC to a single body. Part ■ and second stage The films are self-adhered together to form a single film; The thickness of the film corresponds to the sum of the thicknesses of both films above, and The system has a weakened area that is used to create a seal for the package.

The resist material is appropriately attached to the first film by printing or the like.

The second film is preformed and is thermally bonded to the first film. Alternatively, it may be cast at an appropriate position on the first film and It may be directly adhered to the first film when engaging with the first sheet. tree The cast second film has the following characteristics compared to the preformed second film. There are definite advantages to both. That is, in the usual production of plastic material films, The tube is extruded and then blown and stretched to a very large diameter. . Some of this elongation is due to the orientation temperature (oriela + ion temperature) ature), therefore the plastic material has directionality and the same material It is much stronger than a cast film of the same thickness. Also , once the second film is prefabricated, it must be stretched from roll to roll all the way through. Since it is pulled under force, a relatively large stress is applied to the pre-created first The strength of the second film is therefore the strength required for the package. It becomes much larger than that. This x 5K, cast film is made in advance. It has significant advantages over other films.

The invention therefore provides, in another embodiment, a sheet material as specified above. The whole process of making this process is (1) Attach resist material to selected areas on the surface of the first film of the thermoplastic sheet (11) forming a second film of thermoplastic resin that is thinner than the first film; , pouring the resist material into at least the area of the resist material on the surface of the first film; The step material covers and surrounds the step material, thereby joining both films together. This includes

A plastic material film sheet produced according to the present invention is folded to a predetermined length. Cutting in the middle can produce bags with seals at either the ends or the middle region. child The seal is aligned with and within the weakened area and must be opened to open. When a force is applied, a film with a weakened area is torn open along the weakened area. Ru. Thus, the sheet material of the invention can be used outside of multi-compartment pouches of the type already described ( (, Shang 6 It can also be used to make single-chamber pouches for things like booze and seasonings.

In addition, the plastic material film sheet may be made from other materials or plastic materials. Adhered by thermal gluing or by suitable adhesive to other sheets that may be constructed You may.

Furthermore, plastic material film sheets are especially suitable for making medical waste bags. However, a known chevron seal configuration may also be used.

In addition to those, film sheets can also be used to seal wide-mouthed bottles, etc., in which case The entire weakened area is circular and the film sheet is placed so that the mouth of the container and the weakened area are aligned. When the film sheet is firmly attached to the mouth of the container, the lid becomes a seal. All but a thin thin part that is part of the can be torn off.

Another example of the use of film sheets is as removable stickers for boxes, etc. In such cases, it can also be used as a label.

Within the film sheet 1 (the resist material placed in Measures must be taken to prevent the film sheets in the area from gluing together. do not have.

Brief description of the drawing In view of the above objectives and other objectives that will become apparent later, the features of the present invention are as follows: Reference is made to the detailed description, the appended claims, and some of the figures in the accompanying drawings. will be more clearly understood.

FIG. 1 shows the film sheet of the present invention using two previously prepared films. FIG. 2 is a schematic diagram showing a method for producing a

Figure 2 is a schematic diagram similar to Figure 1, with the extrudate poured into place. This shows how a film sheet' is produced using a relatively thin film.

FIG. 3 is a partially enlarged cross-sectional view taken along line 3-3 of FIG. Show the face.

Figure 4 shows how a film sheet is folded horizontally to form a tube, and this tube is cut at the same intervals. It is a schematic diagram showing a method of making a plurality of bags by cutting.

5 is a plan view of a bag made from the tubing of FIG. 4; FIG.

FIG. 6 is a partially enlarged cross-sectional view taken along line 6--6 of FIG. 1, showing the entire sealed area of the bag; .

FIG. 7 is a partially enlarged cross-sectional view similar to FIG. 6, showing a broken seal.

Figure 8 is a partially enlarged sectional view similar to Figure 6, showing that the film sheet is This is shown attached to another sheet of a different material.

Figure 9 1c. For manufacturing a medical bag using a chevron-shaped seal as a seal. 1 is a partial plan view schematically showing the entire film sheet used; FIG.

Figure 10 shows a film used as a removable lid for containers such as wide-mouthed bottles. FIG. 2 is a partially cut schematic plan view showing the sheet.

FIG. 11 shows the use of a sticker made from a film sheet and taking the form of a label, for example. FIG. 3 is a partial sectional view showing a box etc. in which each end of the flap is connected.

When referring to the drawings in Detail 1, first refer to all of Figure 3. Illustrated is a film sheet of plastic material made in accordance with the present invention; There is a preselected weakened area in the target.

The number 10 is the entire sheet of plastic material, which has an internal resist layer. It has a weakened region 11 defined by 12. The material of the resist layer 12 is It may also be used as a food additive, as described below.

Film sheet 10 can be produced in several ways, including the methods shown in FIGS. 1 and 2. It can be produced by the method.

With particular reference to Figure 1, a prefabricated thermoplastic film sheet The resist material 12 printed by a suitable printing device 14 is placed on the plate 13. exist. Also, a second pre-fabricated thermoplastic film sheet 15, sheet 1 The same material as 3, or a material that is different but directly compatible with the material of sheet 13. a film sheet on the side where the printed resist material 12 is present; It is attached to the surface of 13. This adhesion (・Ma, both film sheets are properly heated 1 6, 17 and the gap between the two rollers 18 in sequence. like this The film sheets 13.15 are then integrally glued 1C and the resist material 12 is It is buried in it as shown.

As is clear, the film sheet 10 has a weakened region # where the resist material 12 is located. It is integrated except for.

In FIG. 2, a film sheet IOU is made in a somewhat different manner. centre A film sheet 13 is prepared, and a resist material 12 is coated with the film sheet 13 in the manner shown in FIG. It is attached using the contact mechanism 14. Then, the second film sheet 20 cast or cast extrusion at a temperature sufficient to bond integrally to the sheet 13. The film is then extruded from the film extrusion molding machine 21. As mentioned above, the second film Film 20 is much weaker than film 15 when it is in the form of a cast extrudate. , seal rupture can be controlled with much lower force.

Film sheet 13.15.20'i The plastic material from which it is made must be in contact with itself. It must be a readily self-adhesive, known thermoplastic material that can be adhered to. More details 10 Specifically, those sheets adhere to themselves at the relatively high temperatures specified below. It must be something that has a certain gender. In other words, this high temperature means that the thermoplastic material is As a result, especially in the case of the embodiment of FIG. 2, the cast film 2 0 self-adhesive to the film 12 and, as per its actual purpose, form a single unit as shown in FIG. This is the temperature at which a layered sheet is formed. The preferred thermoplastic is polyester. Polyethylene (Polyethylene) and ionomer resins (ionome resins) rresins), polysalt f-hibinyl (Polyvinylehloride) ). Polyethylene has a pouring temperature, that is, a casting temperature of 320 ~338C, while ionomer resins are Blend resins with temperatures between 304 and 316C can also be used. Meltoy in general A resin with a relatively low index is preferable because the film is more likely to tear. The poured film is at a high temperature, and the heated film 15 is of course The temperature is so high that the poured film itself becomes thermally adhesive. Not only the resist material 12 but also both films in the area of the resist material. The surfaces are also heated to sterilizing temperatures, thereby rendering them sterile.

Therefore, as will be described later, at the opening of the package, the code number MFj59-50158 2 (5) When the film 15 or film 20 is broken, the exposed outer surface will be destroyed. It is in a fungal state.

Hydroxypropyl methane in the American Pharmacopoeia [JSP3CPS] is a food additive. hydroxypropyl methyl cellulose It has been found that in case e) exceptional results are obtained. This material (is r　P Biddle Tsuiya Co., New York, under the trademark Harmacot 603 J. (Biddle Sawyer Corporation) is sold out. . The main characteristics of Pharmacot 603 J are , S, Food and Drug Administration) It is certified as a food additive and meets all specifications of the United States Pharmacopoeia. It means following the rules. Furthermore, it includes food from Kosher. Certificate of Authentication (a) for food application certificate of Certication) may be given.

r　Pharmacot　603　J has the property of being suspended in water or alcohol. have the ability. In this way, it is possible to create a liquid with high viscosity, and this liquid is It is diluted by adding more water on the printing machine, and the printer can use special Its viscosity can be adjusted according to the needs of the application. r Pharmacot 603 J ('j: both in water and in alcohol, also on a whole food basis) It is suspended in the product of b and is itself recognized as a food additive. Therefore, a resist is produced that is completely edible and does not contaminate all food products.

Other materials considered suitable for use as resists and for use with food is methyl cellulose hydroxypropyl methyl cellulose phthalate (me mouth) +yl cellulose hydroxypropyl methylce 1ulose phlbalaLe) + hydroxypropyl cellulose (hydroxypropyl ce order ulose) + ethyl cellulose (micro quality) cellulose (microcrystalli...el lulos) e).

sugar, pharmaceutical grade shellac lac) + pharmaceutical grade wax (pharmaceutical grade waxes) rcarboxymethylcellulose (carboxymelh yl cel lulose) + zein.

cross-linked polyvinylpyrrolidone yl pyrrolidone) + polyvinyl acetino phthalate (p olyvinyl acetyl phthalate) Cetate phthalate (cellulose acetetephthalate + e ), acrylic polymers, and the above It is a product related to.

A typical loan consists of tails (C, thickness of sheet film 10, B1, 2, 5, U) At this time, the thicker film 1:l-j:100p The thickness of the thinner film is on the order of 25,α.

The preferred thickness range for the thinner film is 5 to 50μ (or 7μ depending on the purpose). ~10μ), and the ratio of the thickness of both films is usually in the range of 2:1 to 5=1. Typically, the ratio is 4:1.

When making a typical bag using film sheet 10, the width of film sheet 8100 is This is the exact width required to make the bag or a multiple thereof. The width of the resist material 12 is the width of the bag. Almost equal to the planned width.

As shown in FIG. 4, the film sheet 10 is reversely folded and its edges are are heated and closed together at 22. Closed areas can be folded flat good. Finally, a tubular body 23 is obtained.

The tubular body 23 is provided with laterally extending seals 24 at intervals as shown in FIG. kicked and then cut off. As a result, a bag designated as a whole by the number 25 is produced. Once manufactured, the appropriate product is placed in the bag, and then the opposite end of the bag 25 is placed in another bag. It is closed by a seal 26. This closed position is determined by the resist material 12. It coincides with and completely lies within the weakened region 11.

A typical cross-section of the bag is shown in FIG. 6, and the heat seal 26 is clearly visible. Two walls of the bag 27.

28, and the walls 27, 28 have free ends 14 30.31 and the free end allows the bag to be opened easily. 7th As shown in the figure, when the free ends 30, 31' (5) are pulled apart, the wall 27 in the area defined by the weakened part 11, and the area defined by the weakened part 11 is , with the thinner portion of the first film sheet cut away and adhered to the wall 28. Become.

Of course, the bag 25 shown in the figure may contain multiple film sheets such as the film sheet 10. This is just one example of how numbers can be used.

FIG. 8 shows the film sheet 10 used to make the bag 35. The bag 35 contains the film sheet 11) and other films designated as a whole by the number 36. It is made by bonding to the material. Of course, the sheet material 36 is paper in shape. Paper film laminates, metal film laminates, blanks, etc. are possible. Illustrated implementation In the example, the other sheet 36 is a laminate including an inner layer 37 and an outer layer 38. , the inner layer of which is shown in FIG. It is joined to the area. The seal 40 may be either an adhesive seal or a thermal insulation seal. But that's fine.

In Figure 9, the conventional type of bag, indicated as a whole by the number 41, is a bag for medical waste. It is mainly used for storing and transporting waste. The bag 41 has a number, ↓2 indicates the whole A chevron shaped seal is provided as shown. According to this invention, bag 4 1 in the form of a film sheet 10 and the other layers (. It may also be in the form of a sheet such as the sheet 36.

The weakened region 11 of the film sheet 10 is illustrated as a chevron shape and its area A suitable bond 43 is located in the center of the area.

Figure 10 shows a film sheet that can be used as a container lid or other type of cover. 10 is shown. The illustrated wide-mouth bottle 44 is a well-known one, with a sealing opening 4 5. The lid, indicated by the number 46, is suitably glued to the mouth 45 by means of a seal 47. . The seal 47 may be adhesively bonded or melt bonded, and may include an annularly illustrated resist. The position coincides with the point 12. The lid 46 has a suitable toughness 48, which can be used If so, gradually tear off all of the lid material that corresponds to the joint 47 using the same method as shown in Figure 7. becomes easier.

In FIG. 11, numeral 50 indicates the entire box 50 of the conventional type. the box 5o has walls 51, 52 and 53, which wall 52 has an inner closing flap 54; The walls 51 and 53 have outer closing flaps 55 and 56, respectively. number as a whole The closure member indicated by the numeral 57 corresponds to the resist material 12 at 586. This closing member 5 is properly glued to the flaps 55 and 56 at can be easily removed.

Additionally, if the box 50 accommodates other containers or packages, the closure member 57 may be may act as a storage seal or as a suitable label. It may be a spider.

At this time, the C-sheet film 10 can be bonded by adhesive bonding or by thermal bonding, i.e. by melting. It can be attached to other materials by fusion bonding. Of course, the two layers are all bonded together for the final product. Sheet film 1 (lj: not a laminated material but an integral single-thickness film) In addition, the resist side material] 2 is such that the film sheet 10 is It has such properties and thickness that it completely prevents self-adhesion in the weakened region 11. .

Moreover, the same film 10 and the seal applied thereto are related to the inventor's earlier application 1C. In a multi-compartment container of the type disclosed in U.S. Pat. No. 3,608,709, Can be used.

The resist on each side is a food-compatible product and is not food- or food-added. The resist and exposed film surface are sterile, so food is prepared according to the present invention and placed in a packaging container, and then the packaging container is filled with a film. when opened to communicate the compartments or to dispense the product by rupture of the chamber; The food flows over the resist material without any risk of contamination. .

The sheet material of the present invention can be used for packaging in a wide variety of fields. Molding process gear Sterilization is achieved by the melt bonding process itself, making it possible to The packaging is particularly suitable for use in the medical and pharmaceutical fields, e.g. for ice packs. Used for packaging surgical instruments, hypodermic needles, drugs, barium meals, etc. Can be done. In the field of cosmetics, two ingredients must be mixed for use. Particularly suitable for containers for products such as depilatory agents, hair colorants, etc.

As pointed out above, the above packaging may be It can be used for food materials such as liquids, and in the industrial field, for example, when used It can be used to mix ingredients, especially in the packaging of adhesives such as epoxy resins.

Engraving (no changes to the contents) Procedural amendment (formality) July 5th, 1982 Gakudono Shiga, Commissioner of the Patent Office Incident display Showa year application no. Relationship with Kotoki Patent applicant (1110) Address: Room 209, Tomigami Building, 3-2-3 Marunouchi, Chiyoda-ku, Tokyo international investigation report

Claims (1)

[Claims] 1. A seal that can be broken? A thermoplastic material particularly suitable for making packages with A film sheet (10), the sheet having a predetermined seal forming area and the sheet. an internal resist provided within the sheet at a position substantially coinciding with the area where the sheet is formed; material (12), and the resist material covers the sheet in the seal forming area. Reduce the effective thickness and define the entire preselected weakened area with two surface areas, one of which Only the surface part can be torn; elsewhere the sheet is Even if the entire thickness may be torn, a part of the thickness may not be torn. - In the leg material film sheet, the film sheet (10) is made of the same thermoplastic material. Made only from at least two sheets of plastic material (13, 15) and their The sheets have a single structure in areas other than the predetermined seal forming area, so that they are self-contained. A thermoplastic material film sheet characterized by being thermally bonded. 2. The resist material (12) is used to form a melt seal in the predetermined sheet forming area. During formation 17i: the sheet (lO) self-adheres in the weakened area (11). The sheet according to claim 1, characterized in that the sheet has properties that prevent the sheet from causing damage. 3. One of the films (15) is significantly thinner than the other (13), and the thinner one The film (15) has the seal forming area and the produced seal. effective strength? The sheet according to claim 1 or 2, which defines all the features. 4 The thickness of the thicker side (13) of the film is on the order of 100μ, Claim characterized in that the thickness of the thinner part (15) of the lumen is of the order of 25μ. Sheet in box 3. 5. The thinner film (15) is cast directly onto the thicker film (13). The thicker film (13) is a cast film that is heat-bonded to itself. The sheet according to claim 3 or 4, characterized in that it is a lume. 6. The resist material (12) and the resist material facing each side of the resist material. The surface of the film (10) is heat sterilized. Sheet for any term in the range. 7. The weakened region (11) completely surrounds the predetermined seal forming region. The preceding claim is characterized in that it extends and forms a weakened area entirely around the seal forming area. sheet for any term in the requested range. 8. The resist material (12) is selected from food or food additives. A sheet of any of the preceding claims. 9. The above resist (121j, Hydroxypropyl methylcellulose USP 3. The sheet of any of the preceding claims characterized in that it is a CPS. to. 10. said sheet (10) is folded on itself and said seal forming area A portion of the sheet remote from is adhered to the seal-forming area and a breakable seal (26 )’t any of the preceding claims characterized in that it forms together with section sheet. 11. The other edges of the sheet are glued together to create a sealed loan. The sheet according to claim 10, characterized in that: 12. A single material particularly suitable for making packages with breakable seals. a thermoplastic material film sheet, the sheet having a predetermined seal forming area and the sheet; The inner resist material present in the sheet is aligned so as to approximately correspond to the area where the roll is formed. and the resist material reduces the total effective thickness of the sheet in the seal forming area. At the same time, all preselected weakened areas are defined, and the weakened areas are in the predetermined seal shape. The seal forming area completely surrounds and extends around the entire periphery of the seal forming area. When the sheet is folded and the seal forming area is 01582 (2) a single material forming a single seal, completely within said weakened area; In the thermoplastic material film sheet, other than the area of the resist material (12) The sheet (10) is characterized in that it has a single structure. 13. Item 1 of any of the preceding claims (claimed thermoplastic material film an enclosed package made from a sheet with a seal that allows the package to be broken; in an enclosed package having at least one chamber adhered by The self-limiting resist material (12) of the lume sheet (10) is arranged so that the breakable seal ( 26) so as to reduce the effective thickness of the sheet (10) in the area of an enclosed package characterized in that it is disposed substantially transversely to the seal (26)'; Ji. 14, (i) Register in selected areas on the first film (13) of thermoplastic sheet material. fully depositing the strike material (12); (11) A second film made of thermoplastic resin (thinner than the first film (13)) 20) at least in the region of the resist material (12). cast onto the surface of the resist film, completely covering the resist material and surrounding it with both resist materials. a sheet according to claim 1, comprising the step of gluing the film together ( 10) Formation method. Engraving (no changes to the content)