KR20090017016A - Opening detectable vinyl bag - Google Patents

Abstract

A vinyl bag is provided to allow whether the vinyl bag is opened or not to be confirmed easily, thereby improving the safety of the content received in the vinyl bag. A vinyl bag comprises a main body member(100) having the space receiving the object and an input hole(130); a lid part(200); an adhesive coating layer(150) which is coated on the lower surface of the input hole; a banding paper(160) fixed temporarily to protect the adhesive coating layer; and a letter printing part(210), wherein the input hole screens the input hole by the folding and thermal welding of the upper part of the main body part.

Description

OPENING DETECTABLE VINYL BAG}

The present invention relates to a plastic bag, and more particularly, to an improved plastic bag so that it is easy to check whether the article is stored and stored after being sealed.

In general, the plastic bag is manufactured by sealing the rim so that two layers of vinyl and an air layer are formed therebetween, so that the article can be stored and carried in the air layer.

Such plastic bags usually have an entrance at the top, and also have a handle around the entrance, and are used to store or transport various objects and items including food and beverage in the interior space.

Plastic bags or plastic bags used for such purposes are Korean plastics room No. 0324371 (2003.08.12) "Plastic bags with arc welding", Korean plastics room No. 0344351 (2004.02.27) "Plastic bags", Korea Registered Room No. 0427752 (September 25, 2006) is disclosed in various forms, such as "ziplock plastic bags" that can seal the contained contents, including "vinyl bags."

On the other hand, due to the recent increase in the frequency of terrorist incidents, the regulation of imported goods in the aircraft is becoming strict.

For example, sharp objects such as nail clippers, multipurpose knives, knitting needles and eyebrow trimming knives, including scissors, razors and knives, but liquids, gels and aerosols, such as shampoo, rinse, tube kochujang and sprays, depending on the country. Ryu cannot be carried on board; Liquids, gels, and aerosols in containers such as lip gloss and skin can be brought into the cabin when placed in a transparent zipper lock plastic bag (about 20 × 20 cm). However, one container can not exceed 100ml, a total of 1L, one zip lock vinyl per person allowed is an example.

However, all of the conventional plastic bags have been opened, the problem is that the carry-on items stored in the plastic bag can be easily taken out and used in the cabin, despite the strict regulations of carry-on goods, this phenomenon has become famous. .

In addition, even in the case of a zipper lock plastic bag that has a sealing function, since the structure can be opened freely according to the user's choice after the initial sealing, the product can be sealed and stored separately. There was no difference from the existing plastic bags.

In addition, the visitor's visit to a laboratory that requires confidential security controls visitors to bring in portable photographing devices and portable storage devices.In order to improve confidence in the safe transportation status when delivering important documents and important items, There is a need for a plastic bag that can be identified.

The present invention was created in view of the limitations of the prior art as described above, and particularly, when the aircraft is boarded, visited the institute, and when the courier transports important items, the articles are put in a plastic bag and sealed. By making it easy to check, it is possible to provide not only the safety of the cabin but also the attention of the passengers, the convenience of visitors to the institute, and the provision of a checkable plastic bag that can improve the reliability of the transportation status of important items. Let it be the main problem.

The present invention is a means for solving the above problems, a vinyl having a main body portion having a space for accommodating the article and the inlet opening, and a lid portion which is folded and heat-sealed a part of the upper end of the body portion to cover the inlet For bags; An adhesive coating layer formed on the lower surface of the inlet of the main body; A release band temporarily fixed to protect the adhesive coating layer; Formed on the inner surface of the cover portion provides a plastic bag comprising a character printing portion coated to include a specific character or sentence shape transferred to the adhesive coating layer when sealed.

In this case, a separate printing stripe for sealing the inlet is interposed between the main body portion and the cover portion, and the letter printing portion is also formed on the inner surface of the printing stripe.

In addition, the upper portion of the main body portion is characterized in that the handle portion is further formed by punching.

In addition, the edge of the main body portion and the cover portion is characterized in that the heat stamping portion is further formed by a heat stamping method to a certain width to increase the sealability.

In addition, the inner surface of the cover portion is characterized in that it is maintained in a surface-modified state by corona discharge before the letter printing portion is printed.

In addition, the letter printing portion and the release agent layer gravure printing on the inner surface of the cover portion in a specific character, letter, sentence; It is also characterized in that it consists of a color coating layer coated with adhesive to implement the color while protecting the upper portion of the release agent layer.

In addition, the release agent layer is characterized in that the acrylic resin: 30 to 50% by weight, wax: 20 to 25% by weight, and the residual solvent is formed by mixing.

On the other hand, the release agent layer in the range of 4 to 5% by weight relative to 100% of the total weight, ethylene vinyl acetate-based resin, crystalline polyethylene-based resin, modified polyolefin-based resin alternatively to further add one or more adhesive resin It has its features.

In addition, using the paraffin wax as the wax, it is also characterized in that the addition of microwax in the range of 1 to 3% by weight relative to the total weight of the added wax.

In addition, the color coating layer comprises a residual solvent such that 50 to 75% by weight of the first adhesive resin, 10 to 20% by weight of the second adhesive resin, 5 to 20% by weight of the pigment and 100% of the total weight. It also has its features.

Further, 50 to 75% by weight of vinyl resin is used as the first adhesive resin, and 10 to 20% by weight of polyurethane resin is used as the second adhesive resin. MEK (methyl ethyl ketone) and toluene are used as the solvent. In addition, the use of ethyl acetate (EA: Ethyl Acetate) in 4: 4: 2 ratio is also characterized by.

In addition, 50 to 75% by weight of polyamide is used as the first adhesive resin, and 10 to 20% by weight of nitrocellulose is used as the second adhesive resin, and toluene and isopropyl alcohol (IPA) are used as the solvent. : Isopropyl alcohol) and ethyl acetate (EA: Ethyl Acetate) are also used in a 5: 3: 2 ratio.

On the other hand, as another solution means, in the plastic bag, the cover portion that can cover the space for storing the article, the character printing portion coated to include a specific letter or sentence formed on the inner surface of the cover portion, and the character The present invention provides a plastic bag comprising an adhesive coating layer coated on the upper portion of a printing unit and a release band temporarily fixed to protect the adhesive coating layer.

The present invention makes it possible to easily carry a portable article safely by allowing the user to easily check whether the article is opened after its sealing in a place where it is necessary to check whether the article is opened and reopened in a sealed state as well as in the cabin. Provides an effect that can call attention.

Hereinafter, a preferred embodiment according to the present invention will be described in more detail.

Figure 1 is a partially cutaway perspective view of a plastic bag showing an embodiment according to the present invention, Figure 2 is an enlarged cross-sectional view showing the "A" part of Figure 1, Figure 3 is an enlarged cross-sectional view showing a "B" part of Figure 1, Figure 4 Is a partially exploded perspective view of a plastic bag showing another embodiment according to the present invention, Figure 5 is a partial perspective view showing an example of the use of the plastic bag according to the present invention.

As shown in Figure 1, the plastic bag according to an embodiment of the present invention comprises a main body 100 and a cover 200.

The main body part 100 and the cover part 200 may be stored in the form of a shape in which the edge is sealed while cutting by heat in a state in which two layers of vinyl are stacked, as in a conventional plastic bag, to accommodate an article by having a space therein. It becomes the structure that there is.

In addition, the lower end of the body portion 100 is configured so that the lower side can be widened based on the extension line 110 is configured to increase the content.

In addition, the cover part 200 is formed by folding a portion of the upper end of the main body portion 100 and being superimposed on the main body portion 100 and thermally fused thereon, and also by a punching method on the upper side of the main body portion 100. The unit 120 is formed.

In addition, the main body 100 of the portion covered with the cover 200 is formed with an inlet 130 is provided with a structure similar to that of a conventional plastic bag so that an object or article can be easily put into the plastic bag.

Furthermore, in the present invention, in order to further increase the sealing property of the cover part 200 including the main body part 100, it is more preferable to form the heat stamping part 140 within a predetermined width, for example, within 15 mm.

The heat stamping unit 140 is formed in the form of pressing by using a stamp that maintains a constant temperature, the overlapping portion in the process is integrated by fusion by heat.

In particular, a portion of the inner surface of the cover portion 200 is provided with a letter printing unit 210, the letter printing 210 is actually reopened after sealing, such as "OPEN" or "open", "OPENVOID" It is desirable to include phrases, sentence patterns, letters, etc. that can be recognized.

More specifically, the letter printing unit 210, as shown in Figure 2, the release agent layer 212 is formed on the surface of the cover portion 200 in the form of a gravure printing method in the form of letters, letters, sentence, etc., the release agent The color coating layer 214, which completely covers the layer 212 and implements color, is formed in a coated structure.

At this time, the release agent layer 212 is composed of acrylic binder resin: 30 to 50% by weight, wax: 20 to 25% by weight, the residual solvent. In addition, the release agent layer may be added to the adhesive resin in the range of 4 to 5% by weight relative to the total weight of 100%, such adhesive resin in ethylene vinyl acetate resin, crystalline polyethylene resin, modified polyolefin resin, etc. It can be selected and added in one or more mixtures.

Here, the reason for limiting the composition of the composition is that in the case of acrylic resin is added for adhesion, if it exceeds 50% by weight, the adhesive property is strong and the release property is lowered, when added to 30% by weight or less, the adhesive property is lowered Since a problem arises in the fixability of 212, it is preferable to limit to the said range.

In addition, the wax is a material added to improve the releasability, a general paraffin wax can be used, if the total amount of the wax is added to 20% by weight or less, the formation is sharply dropped, if it exceeds 25% by weight too much release property Since it becomes high and a problem arises, it is preferable to limit to the said range. In addition, the release properties can be controlled by adding microwax to the wax, wherein the addition range of the microwax is added by mixing in the range of 1 to 3% by weight relative to the weight of the total wax to be added, wherein the microwax is hardened at room temperature. When it loses, it has a little crystallinity, is more viscous than ordinary paraffin wax, and has adhesiveness.

In addition, in order to improve releasability instead of the wax, silicone oil, tar, and the like may be used in the form of a solution or emulsion, and the amount of addition is preferably the same category as the wax, and these waxes, silicone oils, tars, etc. may be improved. In addition to the releasability, the materials added to improve the gloss, anti-foaming, lubricity and the like.

The solvent is used to dissolve acrylic resin, wax, and the like, which are solvents, and is a component which is subsequently volatilized, and a mixed liquid of an aliphatic hydrocarbon and an aromatic hydrocarbon is mainly used. At this time, MEK (methyl ethyl ketone) or the like is used as the aliphatic hydrocarbon, and toluene or the like is preferably used as the aromatic hydrocarbon.

Meanwhile, the adhesive resin may be ethylene vinyl acetate resin, crystalline polyethylene resin, modified polyolefin resin, or the like, and the adhesive resin is disclosed in Korean Patent Application Laid-Open No. 2002-48672, Since Patent Publication No. 1992-19897 and Korean Patent Publication No. 1994-4166, the detailed description is omitted here. However, the adhesive resin used in the present invention is not limited to the above-mentioned resin type.

On the other hand, the color coating layer 214 includes a residual solvent such that 50 to 75% by weight of the first adhesive resin, 10 to 20% by weight of the second adhesive resin, 5 to 20% by weight of the pigment and 100% of the total weight. It is configured and described in detail as follows.

In a preferred embodiment, when polyethylene terephthalate (PET) is used as a material for the plastic bag, the composition of the color coating layer 214 is 50 to 75% by weight of vinyl resin and 10 to 20% by weight of polyurethane resin. , Pigment 5-20% by weight, the residual solvent (total weight 100%) can be used, wherein the solvent is MEK (methyl ethyl ketone), toluene, ethyl acetate (EA: Ethyl Acetate) 4: 4: 2 Use as a ratio.

In another embodiment, when using polyethylene (PE: Polyethylen) as the vinyl bag material, the composition of the color coating layer 214 is 50 to 75% by weight of polyamide, 10 to 20% by weight of nitrocellulose. It is preferable to use, including 5 to 20% by weight of the pigment, the residual solvent, wherein the solvent is toluene, isopropyl alcohol (IPA: Isopropyl alcohol), ethyl acetate (EA: Ethyl Acetate) in a 5: 3: 2 ratio Used as. After the color coating layer 214 is formed, the solvent is volatilized in the drying process.

Due to the difference in the composition as described above, the release agent layer 212 and the color coating layer 214, there is a difference in the adhesive strength that is adhered to the surface of the lid portion 200 of the plastic bag, thereby causing a release agent layer ( 212 is easily released, while the color coating layer 214 is not relatively easy to release compared to the release agent layer 212, so that only the release agent layer 212 at the part that is opened when the lid 200 is sealed and then reopened is covered. Since it is easily released from the part 200 will be able to easily determine whether the opening.

Here, before the release agent layer 212 is applied to the surface of the cover portion 200, the surface of the cover portion 200 is modified by plasma treatment through corona discharge under atmospheric pressure to improve the adhesion of the surface of the cover portion 200. More preferred.

Meanwhile, an adhesive coating layer 150 is formed at a portion below the inlet 130 of the main body part 100, that is, the cover part 200 is overlapped, as shown in FIG. 3, and the adhesive coating layer 150 is formed. There is a release band 160 is attached to temporarily protect it.

Thus, when the release strip 160 is removed and the inside surface of the cover part 200, preferably, the letter printing part 210 is adhered to the contact coating layer 150 of the main body part 100, 130) When the sealing is completed and the lid 200 is lifted to reopen it, the color coating layer 214 of the lid 200 is released by the release agent layer 212, and the release agent layer 212 is released. Only the pigment of the part other than) is left. That is, even if the letter printing part 210 of the cover part 200 is re-adhesive again on the adhesive coating layer 150 of the main body part 100, the release agent on the surface of the cover part 200 in which the pigment is separated by the release agent. Letters or patterns formed by the layer 212 will appear.

More specifically, only a specific part is separated from the surface of the cover part 200, and letters or patterns on the part appear in the form of, for example, "open" or "OPEN" so that it can be immediately confirmed whether the opening. give.

On the other hand, as illustrated in FIG. 4, the print strip 300 is separately made and interposed between the main body part 100 and the cover part 200 when the cover part 200 is formed, and heat-sealed together. Can be configured.

At this time, the main body portion 100 has the adhesive coating layer 150 and the release strip 160 in the same form as described above, the above-described letter printing portion 210 on the inner surface of the print strip 300 is the same. It is formed in the form.

The present invention having such a configuration is used as follows.

First, when passing through the checkpoint before boarding an aircraft or the like, the inlet 130 of the plastic bag of the present invention is opened in order to store prohibited items, for example, liquid items, and these items are charged.

When the article is loaded, the user applies force while holding a part of the release strip 160 to lift the release strip 160 from the adhesive coating layer 150.

That is, since the release agent is uniformly coated on the surface of the release bandage 160, the release bandage 160 is not completely adhered to the adhesive coating layer 150 and is temporarily attached so that only a part thereof is slightly attached. Separation can be easily removed, whereby the adhesive coating layer 150 is completely exposed on the surface of the main body portion 100.

In this state, the letter printing portion 210 which is directly printed on the surface of the cover portion 200 or formed on the inner surface of the printing strip 300 provided separately is rubbed against the adhesive coating layer 150. While the adhesion is made to completely cover the inlet 130 of the body portion 100 is sealed.

In this case, the color coating layer 214 and the release agent layer 212, which are printed or coated on the inner surface of the cover part 200 or the print band 300, maintain the adhesive state with the adhesive coating layer 150. .

Lifting the cover portion 200 or the print strip 300 bonded to the user or any person to reopen the sealed plastic bag in this way, for example, as shown in Figure 5, the relatively weak adhesive layer 212 ) Is separated from the surface of the cover portion 200 or the print strip 300 first, so that the mold is transferred to the adhesive coating layer 150 in a plate-like form, and the transferred portion is released. In the cover 200 or the print strip 300, phrases such as " OPEN " or " opening "

On the other hand, in another embodiment according to the present invention, in the plastic bag consisting of a body portion having a space for storing an article, an inlet and a cover portion that can cover the inlet, the inner surface of the cover portion or the outer surface of the body portion Characterized by printing to include a specific letter or a sentence formed in a certain place of the printing portion, characterized in that it comprises an adhesive coating layer formed on top of the letter printing portion, and the release stripe is temporarily fixed to protect the adhesive coating layer A plastic bag can be provided. Here, the letter printing unit is composed of a release agent layer on which letters, etc., are printed, and a color coating layer which completely covers the letters.

That is, since each of the components, such as the letter printing portion, the adhesive coating layer, the release band has the same structure and composition as the other embodiments described above, detailed description thereof will be omitted. Therefore, the structure, composition and composition range of the detailed components for each component, please refer to the description of the other embodiments described above.

The adhesive applied to the upper layer is formed by peeling off the release strip and rubbing against the corresponding main body surface or the cover surface in the configuration of the letter printing portion, the adhesive coating layer, and the release stripe formed on one surface of the cover portion or the main body portion of the plastic bag. It is sealed by an application layer. Then, when the plastic bag is reopened, phrases such as “OPEN”, “VOID”, or “opening” appear clearly due to the difference in adhesion between the color coating layer and the release agent layer. That is, during sealing, the sealing state can be maintained by the adhesive force, and when the resealing is performed after the primary sealing, the above-described phenomenon occurs and the resealing can be easily visually confirmed.

1 is a partially cutaway perspective view of a plastic bag showing an embodiment according to the present invention,

FIG. 2 is an enlarged sectional view showing part “A” of FIG. 1;

Figure 3 is an enlarged cross-sectional view showing the "B" portion of FIG.

Figure 4 is an exploded perspective view of part of the plastic bag showing another embodiment according to the present invention,

5 is a partial perspective view showing an example of use of the plastic bag according to the present invention.

♧ description of the symbols for the main parts of the drawing ♧

100 .... Main unit 110 .... Enhanced

120 .... Handle 130 .... Inlet

140 ... heat stamping 150 ...

160 .... release strip 200 .... cover

210 .... Text Printing 212 .... Release Layer

214 .... chromatic layer 300 .... printing stripe

Claims (13)

A plastic bag having a main body having a space for storing an article and an inlet, and a lid portion of the upper portion of the body portion folded and heat-sealed to cover the inlet; An adhesive coating layer formed on the lower surface of the inlet of the main body; A release band temporarily fixed to protect the adhesive coating layer; Opening checkable plastic bag, characterized in that it comprises a letter printing portion formed on the inner side of the cover portion and coated to include a specific letter or sentence shape transferred to the adhesive coating layer during sealing. The method according to claim 1; Between the main body and the cover portion is a separate printing strip for sealing the inlet is interposed, the letter printing portion is a vinyl bag, characterized in that formed on the inner surface of the printing strip. The method according to claim 1; Opening checkable plastic bag, characterized in that the handle portion is further formed by punching the upper portion of the body portion. The method according to claim 1; Opening checkable plastic bag, characterized in that the heat stamping portion is further formed on the edge of the main body portion and the cover portion by a heat stamp method to a certain width to increase the sealing. The method according to claim 1; Opening checkable plastic bag, characterized in that the inner surface of the cover portion is maintained in a surface modified state by the corona discharge before the letter printing portion is printed. The method according to claim 1; The release printing layer is a gravure printing on the inner surface of the cover portion in a specific letter, letter, sentence shape; Openable checkable plastic bag, characterized in that consisting of a color coating layer coated with adhesive to implement the color while protecting the upper part of the release agent layer. The method according to claim 1; The release agent layer is an acrylic resin: 30 to 50% by weight, wax: 20 to 25% by weight, the open-checkable vinyl bag, characterized in that formed by mixing the remaining solvent. The method of claim 7; The release agent layer is 4 to 5% by weight relative to the total weight 100%, ethylene vinyl acetate-based resin, crystalline polyethylene-based resin, modified polyolefin-based resin alternatively characterized in that at least one adhesive resin is further added. A plastic bag that can be opened. The method of claim 7; Paraffin wax is used as the wax, and the opening-checkable vinyl bag, characterized in that the addition of the microwax in the range of 1 to 3% by weight relative to the weight of the total wax is added. The method according to claim 6; The color coating layer comprises a residual solvent such that 50 to 75% by weight of the first adhesive resin, 10 to 20% by weight of the second adhesive resin, 5 to 20% by weight and 100% of the total weight of the pigment. The plastic bag which I can confirm opening. The method of claim 10; 50 to 75% by weight of the vinyl resin as the first adhesive resin, 10 to 20% by weight of the polyurethane resin as the second adhesive resin, MEK (methyl ethyl ketone), toluene, ethyl as the solvent Openable plastic bag, characterized in that the acetate (EA: Ethyl Acetate) in 4: 4: 2 ratio. The method of claim 10; Polyamide 50 to 75% by weight as the first adhesive resin, 10 to 20% by weight of nitrocellulose as the second adhesive resin, toluene, isopropyl alcohol (IPA: Isopropyl) as the solvent alcohol), ethyl acetate (EA: Ethyl Acetate) is a vinyl bag that can be opened, characterized in that the ratio of 5: 3: 2. A plastic bag comprising a main body having a space for storing an article, a main body having an inlet, and a cover that can cover the inlet, wherein the plastic bag is coated to include a specific letter or a sentence formed at a predetermined position on an inner surface of the cover or an outer surface of the main body. Opened printable plastic bag, characterized in that it comprises a printed letter, the adhesive coating layer formed on the upper portion of the letter printing portion, and a release band temporarily fixed to protect the adhesive coating layer.

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