TWM614019U - Ink bag - Google Patents

Abstract

The disclosure provides an ink bag consisted of multi-layers made by coextrusion process. The multi-layers ink bag, from inside to outside, sequentially comprises a resistant welding layer, a gas-proof layer, a light-proof layer and a puncturing proof layer. The resistant welding layer comprises at least one polypropylene (PP) layer, which is disposed at the most inside layer and in contact with the ink. The ink bag of the disclosure is capable of resolving the blocking of ink-jet head caused by the materials in the ink precipitating from the ink bag in the conventional art.

Description

Ink bag

This creation relates to an ink bag, in particular to a multilayer film ink bag prepared by coextrusion.

With the increasing use of inkjet printing technology in various industries, such as publishing, textile, technology, and biomedical industries, how to more effectively preserve and maintain ink quality has also become an important issue. In the early days, inkjet printers used hard-shell containers to fill ink. In recent years, flexible ink bags have also appeared. With the increasing improvement of ink technology, the quality requirements of ink and the types of ink content are more complex and diverse. For example, some are volatile, some are corrosive, and some require strict blocking of light, air, and water contact.

Figure 1 shows a schematic diagram of the ink bag layer structure in the prior art. In Figure 1, the ink bag from the inner layer to the outer layer is a polyethylene (PE) layer 2, a nylon layer 4, an adhesive layer 5, an aluminum film 6, an adhesive layer 5, and polyethylene terephthalate as a printing layer. Polyethylene terephthalate (PET) layer 8. The polyethylene layer 2 can be used as a solvent volatilization resistance and barrier solvent contact with the outside, the nylon layer 4 can be used as a puncture-proof layer, the aluminum film 6 can be used as a barrier to light and air, and the polyethylene terephthalate layer 8 can be used as a printing layer . However, in this multi-layered ink bag, for example, the polyethylene layer 2 in contact with the ink will precipitate into the ink, causing the nozzle to be easily clogged and seriously affecting the service life of the nozzle. In addition, this kind of thin aluminum In the ink bag of the film, due to the ink flow in the bag, it is easy to cause the aluminum film to produce creases and small cracks, so that external light can easily irradiate the ink solvent in the ink bag through the cracks, causing the ink solvent to change.

Therefore, there is a need for a new and improved ink bag to overcome the above-mentioned shortcomings of the conventional ink bag.

In view of this, this creation provides a multilayer film ink bag prepared by co-extrusion. The multi-layer film of the ink bag includes a chemical resistant welding layer, a gas barrier layer, a light blocking layer, and an anti-puncture layer, from the inner layer to the outer layer, and the chemical resistant welding layer includes at least one polypropylene layer , Located in the innermost layer to be in contact with the ink solvent. The ink bag of this creation is composed of a multi-layer film in a co-extrusion method, which can be prepared at one time. Compared with the conventional structure, the layer has better adhesion between layers and is less easy to peel off, and each layer can be plasticized. Composed of materials, the ink bag can also be lighter and thinner. In this creation, the innermost layer of the ink bag in contact with the ink is a polypropylene (PP) chemical-resistant welding layer, which has better chemical-resistance and thermal welding capabilities, which can effectively block The precipitates from other layers of the ink bag enter the ink, thereby avoiding and eliminating the problem of nozzle blockage caused by the above-mentioned precipitates. In addition, the inner layer is a polypropylene layer with better heat-sealability, which has better heat-seal strength, and can also provide better bonding strength, and it is not easy to cause the ink bag to break.

Preferably, the ink bag further includes an adhesive layer located between the chemical resistant welding layer and the gas barrier layer, the gas barrier layer and the light barrier layer, and the light barrier layer and the puncture prevention layer.

Preferably, the chemically resistant welding layer of the ink bag includes a first polypropylene layer and a second polypropylene layer, and the first polypropylene layer is located in the innermost layer and is in contact with the ink, and the second polypropylene layer Located between the first polypropylene layer and the adhesive layer.

Preferably, the second polypropylene layer of the ink bag comprises a colored polypropylene material.

Preferably, the gas barrier layer of the ink bag contains ethylene vinyl alcohol copolymer (EVOH).

Preferably, the light-blocking layer of the ink bag includes at least one polyethylene (PE) layer.

Preferably, the light blocking layer of the ink bag includes a first polyethylene layer and a second polyethylene layer, and the first polyethylene layer and the second polyethylene layer include black or white materials.

Preferably, the puncture prevention layer of the ink bag includes a nylon layer.

Preferably, the multilayer film of the ink bag has a thickness ranging from 50 to 240 microns (μm).

In the ink bag prepared by the co-extrusion method of this creation, the innermost layer in contact with the ink is made of a polypropylene layer with better chemical resistance. Since it can solve the problem of nozzle blockage caused by precipitates, it can also be used Extend the service life of the nozzle.

2: Polyethylene layer

4: Nylon layer

5: Adhesive layer

6: Aluminum film

8: Polyethylene terephthalate layer

10: Multilayer film

12: Chemical resistant welding layer

121: The first polypropylene layer

122: second polypropylene layer

14: Adhesive layer

16: gas barrier

18: light blocking layer

181: The first polyethylene layer

182: The second polyethylene layer

20: Anti-puncture layer

Figure 1 shows a schematic diagram of the ink bag layer structure in the prior art.

Fig. 2 shows a schematic diagram of the ink bag layer structure of the multilayer film prepared by the co-extrusion method of the creative embodiment.

In order to understand the technical features and practical effects of this creation in detail, and implement it in accordance with the content of the specification, the preferred embodiment shown in the figure is further described in detail as follows. It can be understood that unless otherwise defined, layers and layers may include other layers.

Please cooperate with the preferred embodiment shown in the drawings. This creation provides an ink bag composed of a multi-layer film prepared by a co-extrusion method. As shown in Figure 2, it is a schematic diagram showing the 10-layer structure of the multi-layer film of the ink bag prepared by co-extrusion. The multi-layer film 10 of the ink bag, from the inner layer to the outer layer, may include a chemical resistant welding layer 12 in sequence. , The gas barrier layer 16, the light barrier layer 18, and the puncture prevention layer 20, and an adhesive layer 14 may be formed between the above-mentioned layers. For example, the adhesive layer 14 may be formed on the refractory welding layer 12 and the gas barrier layer 16 , Between the gas barrier layer 16 and the light barrier layer 18, and between the light barrier layer 18 and the puncture prevention layer 20. In one embodiment, the adhesive layer 14 may be made of a material with better chemical resistance. That is to say, the above-mentioned chemical resistant welding layer 12, gas barrier layer 16, light barrier layer 18, puncture prevention layer 20 and adhesion layer 14 may be co-extruded and molded together.

As shown in FIG. 2, in the multi-layer film 10 of the ink bag of this creative embodiment, the chemical resistant welding layer 12 of the innermost layer can be made of polypropylene material with better chemical resistance, such as the first polypropylene layer. 121 and the second polypropylene layer 122. In this creation, the inner layer refers to the side in contact with the ink contained in the ink bag, and the outer layer can be the side away from the ink, such as the side in contact with the outside air. Since this creation uses a polypropylene layer with better chemical resistance as the inner layer, which is in contact with the ink, it can effectively block the precipitation of other layers in the multilayer film from entering the ink, so it can improve and eliminate the ejection head caused by the precipitation. The problem of blocking. In an embodiment, it is also possible to use only one polypropylene layer as the chemical resistant welding layer 12. In addition, the second polypropylene layer 122 may also be made of colored polypropylene.

In the multi-layer film 10 of the ink bag according to this creative embodiment, the gas barrier layer 16 may be ethylene vinyl alcohol copolymer (EVOH) as a barrier for external air to enter the ink bag. However, the light blocking layer 18 may include at least one polyethylene (PE) layer to block external light from entering the ink bag. In FIG. 2, two polyethylene layers are used, the first polyethylene layer 181 and the second polyethylene layer 182, which can be black or white. The gas barrier layer 16 and the light barrier layer 18 can effectively block gas and light from entering the ink bag, so the quality of the ink solvent can be better maintained.

The outermost layer of the ink bag multilayer film 10 of this creative embodiment may be a puncture prevention layer 20, preferably a nylon layer with high strength, to increase the strength of the ink bag. This creation uses coextrusion to co-extrude the above-mentioned multi-layer structure together to form, and the polypropylene layer with better chemical resistance is set to be located in the innermost layer in contact with the ink, which can solve the problem of precipitation into the ink. Cause the problem of nozzle blockage, which can prolong the service life of the nozzle. In the co-extrusion method, material layers with similar properties or layers with high bonding strength between layers do not need to use an additional adhesive layer, so the adhesive layer in the ink bag multilayer film in this creative embodiment can be omitted .

In an implementation, the ink bag of the present invention can be used to contain solvent-based or UV inks, and the multi-layer film structure of the ink bag can have a thickness ranging from 50 to 240 microns (μm), preferably also Approximately 95 microns (μm). It can be understood that the thickness of the ink bag is only a good example, and is not intended to limit this creation. Those in the field can make appropriate changes and adjustments in response to needs.

The above descriptions are only preferred embodiments of this creation, and are not intended to limit the scope of rights claimed in this creation. All other equivalent changes or modifications completed without departing from the spirit disclosed in this creation should be included in this creation Within the scope of patent application.

10: Multilayer film

12: Chemical resistant welding layer

121: The first polypropylene layer

122: second polypropylene layer

14: Adhesive layer

16: gas barrier

18: light blocking layer

181: The first polyethylene layer

182: The second polyethylene layer

20: Anti-puncture layer

Claims (9)

An ink bag is composed of a multi-layer film prepared by co-extrusion. The multi-layer film, from the inner layer to the outer layer, sequentially includes a chemical resistant welding layer, a gas barrier layer, a light barrier layer, and a Puncture prevention layer; wherein, the chemical resistant welding layer includes at least one polypropylene (PP) layer, and the polypropylene layer is located in the innermost layer to be in contact with the ink. For example, the ink bag of claim 1, further comprising an adhesive layer located between the chemical resistant welding layer and the gas barrier layer, the gas barrier layer and the light barrier layer, and the light barrier layer and the puncture prevention layer. The ink bag of claim 2, wherein the chemically resistant welding layer includes a first polypropylene layer and a second polypropylene layer, and the first polypropylene layer is located in the innermost layer and is in contact with the ink, and the The second polypropylene layer is located between the first polypropylene layer and the adhesive layer. For example, the ink bag of claim 3, wherein the second polypropylene layer comprises a colored polypropylene material. The ink bag of claim 2, wherein the gas barrier layer contains ethylene vinyl alcohol copolymer (EVOH). According to the ink bag of claim 2, wherein the light-blocking layer includes at least one polyethylene (PE) layer. The ink bag of claim 6, wherein the light-blocking layer includes a first polyethylene layer and a second polyethylene layer, and the first polyethylene layer and the second polyethylene layer include black or white Material. Such as the ink bag of claim 2, wherein the anti-puncture layer includes a nylon layer. Such as the ink bag of claim 2, wherein the multilayer film has a thickness ranging from 50 to 240 microns (μm).

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