JP3235086U - Ink bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink bag capable of solving a nozzle obstruction due to a precipitate and prolonging the life of a nozzle because the innermost layer in contact with ink adopts a polypropylene layer having excellent chemical resistance. do. An ink bag composed of a multilayer film 10 produced by coextrusion processing, wherein the multilayer film has a chemical resistant welding layer 12, a gas barrier layer 16, a light shielding layer 18, and a light shielding layer in this order from an inner layer to an outer layer. The puncture layer 20, the chemical resistant welded layer contains at least one polypropylene (PP) layers 121, 122, the polypropylene layer is located in the innermost layer and comes into contact with the ink. [Selection diagram] Fig. 2

Description

The present invention relates to an ink bag, and more particularly to an ink bag having a multilayer film produced by coextrusion processing.

As the use of inkjet printing technology increases in various industries such as publishing, textiles, science and technology, and biomedicine, how to more effectively preserve and maintain ink quality has also become an important issue. Conventionally, inkjet printers have adopted a method of filling a hard shell container with ink. In recent years, flexible ink bags have begun to be adopted. As the progress of ink technology increases, the demand for ink quality increases, the types of ink contents increase and become complicated, and for example, volatile, corrosive, light, air, and water are strictly blocked. There is something you need.

FIG. 1 is a diagram showing a structure of an ink bag layer according to a prior art. In FIG. 1, the ink bag has a polyethylene (polyethylene, PE) layer 2, a nylon layer 4, an adhesive layer 5, an aluminum thin film 6, an adhesive layer 5, and a polyethylene terephthalate as a printing layer, in this order from the inner layer to the outer layer. PET) Layer 8. The polyethylene layer 2 prevents the solvent from volatilizing and prevents the solvent from coming into contact with the outside. The nylon layer 4 is a puncture resistant layer. The aluminum thin film 6 allows light and air to be used as a barrier. The polyethylene terephthalate layer 8 is a printing layer. However, in an ink bag having such a multilayer film, for example, in the polyethylene layer 2 that comes into contact with the ink, when a certain substance precipitates and enters the ink, the nozzle is easily closed and the life of the nozzle is shortened. There is a risk. On the other hand, in an ink bag that uses an aluminum thin film, ink flows in the bag, so that the aluminum thin film is likely to be folded back and minute cracks are generated. As a result, light rays from the outside may irradiate the solvent of the ink in the ink bag via the cracks, and the solvent of the ink may be altered.

The main object of the present invention is to adopt a polypropylene layer having excellent chemical resistance as the innermost layer that comes into contact with ink, so that it is possible to solve the nozzle obstruction due to the precipitate and prolong the life of the nozzle. It is to provide an ink bag that can be used.

According to the ink bag according to the present invention, the multilayer film produced by coextrusion is a chemical resistant welding layer, a gas barrier layer, a light shielding layer, and a puncture resistant layer in this order from the inner layer to the outer layer.
The chemical resistant welded layer comprises at least one polypropylene (PP) layer, which is located at the innermost layer and is characterized in contact with ink.

According to the ink bag according to the present invention, the adhesive layer further includes an adhesive layer, and the adhesive layer is between the chemical resistant welding layer and the gas barrier layer, between the gas barrier layer and the light shielding layer, and between the light shielding layer and the puncture resistant layer. It is characterized by being located in.

According to the ink bag according to the present invention, the chemical resistant weld layer includes a first polypropylene layer and a second polypropylene layer, and the first polypropylene layer is located in the innermost layer and comes into contact with ink. The second polypropylene layer is characterized in that it is located between the first polypropylene layer and the adhesive layer.

According to the ink bag according to the present invention, the second polypropylene layer is characterized by containing a colored polypropylene material.

According to the ink bag according to the present invention, the gas barrier layer is characterized by containing an ethylene vinyl alcohol copolymer (EVOH).

According to the ink bag according to the present invention, the light-shielding layer is characterized by containing at least one polyethylene (PE) layer.

According to the ink bag according to the present invention, the light-shielding layer includes a first polyethylene layer and a second polyethylene layer, and the first polyethylene layer and the second polyethylene layer are made of a black or white material. It is characterized by including.

According to the ink bag according to the present invention, the puncture-resistant layer is characterized by containing a nylon layer.

According to the ink bag according to the present invention, the thickness of the multilayer film is characterized by being between 50 and 240 microns (μm).

According to the ink bag according to the present invention, in the ink bag produced by coextrusion processing, the innermost layer in contact with the ink adopts a polypropylene layer having excellent chemical resistance, so that the nozzle is not blocked by the precipitate. This has the effect of extending the life of the nozzle.

It is a figure which shows the structure of the layer of the ink bag which concerns on the prior art. It is a figure which shows the structure of the layer of the ink bag which has a multilayer film produced by the coextrusion process which concerns on embodiment of this invention.

In order to understand in detail the technical features and actual effects of the present invention and to carry out according to the contents of the specification, suitable embodiments as shown in the drawings will be further described in detail. It can be understood that other layers can be included between layers, unless otherwise limited.

The ink bag according to the present invention is composed of a multilayer film produced by coextrusion processing. FIG. 2 is a diagram showing the structure of the layers of the multilayer film 10 of the ink bag produced by coextrusion processing. The multilayer film 10 of such an ink bag is, in order from the inner layer to the outer layer, a chemical resistant welding layer 12, a gas barrier layer 16, a light shielding layer 18, and a puncture resistant layer 20. An adhesive layer 14 is formed between these layers. The adhesive layer 14 is formed, for example, between the chemical resistant welding layer 12 and the gas barrier layer 16, between the gas barrier layer 16 and the light-shielding layer 18, and between the light-shielding layer 18 and the puncture-resistant layer 20. In one embodiment, the adhesive layer 14 is made of a material having excellent chemical resistance. That is, the chemical resistant welding layer 12, the gas barrier layer 16, the light shielding layer 18, the puncture resistant layer 20, and the adhesive layer 14 may be molded together by coextrusion processing.

As shown in FIG. 2, in the multilayer film 10 of the ink bag according to the embodiment of the present invention, the chemical resistant welding layer 12 located at the innermost layer may be made of a polypropylene material having excellent chemical resistance. For example, the first polypropylene layer 121 and the second polypropylene layer 122. In the present invention, the inner layer refers to a surface in contact with the ink filled in the ink bag, and the outer layer is a surface far away from the ink, for example, a surface in contact with external air. In the present invention, the polypropylene layer having excellent chemical resistance is used as the inner layer and comes into contact with the ink, so that it can be an effective barrier for the precipitates from the layers in the multilayer film to enter the ink. The problem of blockage can be improved or eliminated. Of course, only one polypropylene layer may be used as the chemical resistant welding layer 12. On the other hand, the second polypropylene layer 122 may adopt a colored polypropylene material.

In the multilayer film 10 of the ink bag according to the embodiment of the present invention, the gas barrier layer 16 may adopt an ethylene vinyl alcohol copolymer (EVOH) as a barrier for the intrusion of external air into the ink bag. The light-shielding layer 18 may include at least one polyethylene (PE) layer to block light from the outside light into the ink bag. In FIG. 2, two polyethylene layers (that is, a first polyethylene layer 181 and a second polyethylene layer 182) may be adopted, and a black or white material may be adopted. Since the gas barrier layer 16 and the light-shielding layer 18 can prevent gas and light rays from entering the ink bag, deterioration of the ink solvent can be prevented.

The multilayer film 10 of the ink bag according to the embodiment of the present invention may have a puncture-resistant layer 20 as the outermost layer, and is preferably a nylon layer having high strength. This makes it possible to increase the strength of the ink bag. In the present invention, the above-mentioned structure having a plurality of layers is formed together by coextrusion processing, and the polypropylene layer having excellent chemical resistance is used as the innermost layer in contact with the ink to form a precipitate. It is possible to prevent the nozzle from being blocked due to the intrusion of the ink into the ink, and it is possible to extend the life of the nozzle. By adopting coextrusion processing, it is not necessary to use an additional adhesive layer for layers having similar material properties or having high adhesive strength between layers, so that the present invention is carried out. The adhesive layer may be omitted from the multilayer film of the ink bag according to the form.

The ink bag according to another embodiment of the present invention contains a solvent type or UV ink, and the thickness of the structure of the multilayer film is between 50 and 240 microns (μm), and is about 95 microns (μm). However, of course, the thickness of the ink bag is not limited to this. Those skilled in the art may appropriately change or adjust according to their needs.

2 Polyethylene layer 4 Nylon layer 5 Adhesive layer 6 Aluminum thin film 8 Polyethylene terephthalate layer 10 Multilayer film 12 Chemical resistant welding layer 121 First polypropylene layer 122 Second polypropylene layer 14 Adhesive layer 16 Gas barrier layer 18 Light-shielding layer 181 First polyethylene Layer 182 Second polyethylene layer 20 Puncture resistant layer

Claims (9)

The multilayer film produced by coextrusion is a chemical resistant welding layer, a gas barrier layer, a light shielding layer, and a puncture resistant layer in this order from the inner layer to the outer layer.
The chemical resistant welded layer includes at least one polypropylene (PP) layer, and the polypropylene layer is located in the innermost layer and is in contact with ink. Further, the adhesive layer includes an adhesive layer, and the adhesive layer is located between the chemical resistant weld layer and the gas barrier layer, between the gas barrier layer and the light-shielding layer, and between the light-shielding layer and the puncture-resistant layer. The ink bag according to claim 1, wherein the ink bag is made. The chemical resistant weld layer includes a first polypropylene layer and a second polypropylene layer, the first polypropylene layer is located in the innermost layer and is in contact with ink, and the second polypropylene layer is The ink bag according to claim 2, wherein the ink bag is located between the first polypropylene layer and the adhesive layer. The ink bag according to claim 3, wherein the second polypropylene layer contains a colored polypropylene material. The ink bag according to claim 2, wherein the gas barrier layer contains an ethylene vinyl alcohol copolymer (EVOH). The ink bag according to claim 2, wherein the light-shielding layer includes at least one polyethylene (PE) layer. The light-shielding layer includes a first polyethylene layer and a second polyethylene layer, and the first polyethylene layer and the second polyethylene layer are characterized by containing a black or white material. , The ink bag according to claim 6. The ink bag according to claim 2, wherein the puncture-resistant layer includes a nylon layer. The ink bag according to claim 2, wherein the thickness of the multilayer film is between 50 and 240 microns (μm).

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