JP4451778B2 - Packaging bag for curable composition - Google Patents

Description

  The present invention relates to a packaging bag for a curable composition that facilitates handling, transportation, and quality assurance of a multi-component mixed curable composition, and that also takes into account a reduction in volume during disposal.

  There are active energy ray curable resist ink materials that are cured by radiation beams that supply active energy, such as heat, infrared rays, visible rays, ultraviolet rays, or electron beams. In addition, there is a two-component mixed curable composition that is cured by mixing a main agent and a curing agent. Other examples of the curable composition include an adhesive, a paint, and a printing ink. These curable compositions are hermetically sealed to prevent leakage of the contents, gas barrier properties that prevent the passage of gas such as the ingress of oxygen or water vapor or the release of solvents and volatile components, and light-shielding properties that prevent the contents from being altered. In consideration of the above, it is handled in a state of being put in a steel container or a plastic container.

  The main component and the curing agent of the two-component mixed curable composition are put in separate containers. When using these, transfer the entire contents of one of the containers to the other container and mix them, or mix the contents from each container in a quantity weighed to a predetermined ratio. Need to be taken out and mixed. For this reason, the work becomes complicated, which is a factor of greatly reducing work efficiency.

  Steel containers and plastic containers are heavy in weight and bulky. In recent years, due to environmental considerations, there is a demand for reducing the weight and volume of empty containers after use.

A packaging bag for a curable composition according to the present invention includes a sheet member having at least one barrier layer, two or more storage chambers formed by overlapping and heat-sealing the sheet members, and an adjacent storage. A partition for partitioning the chamber. The storage chamber stores a resist ink containing a radical polymerizable component together with air, and a nozzle portion for taking out the resist ink to the outer peripheral portion that overlaps with each other in a state where the storage chambers are folded with each other and the storage chambers overlap each other. Each has the same side as the end. The sheet member has a sealant layer formed of a heat-sealable synthetic resin, a barrier layer having at least one metal thin film layer, and the sealant layer and the barrier layer in close contact with each other with adhesive strength that can be peeled by hand. Easy peeling that is prepared to peel off the barrier layer from the sealant layer and check whether fragments of the metal thin film layer are mixed in the resist ink when bending marks or cracks are found in the metal thin film layer Means.

The peeling means includes a polyethylene layer and a peeling layer. The polyethylene layer is laminated between the sealant layer and the barrier layer. The peeling layer can be easily peeled from the polyethylene layer between at least one of the sealant layer and the polyethylene layer and between the polyethylene layer and the barrier layer.

The sheet member preferably has a thickness of 30 μm or more and 300 μm or less.

At least one of the retract and chamber form at least one of the sides in a tapered shape which narrows toward the tip of the nozzle portion.

  Further, when two storage chambers are provided, a two-component mixed type resist ink composed of a main agent and a curing agent is stored as the resist ink.

  The air stored in the storage chamber together with the resist ink may be 5% or more and 30% or less by volume with respect to the resist ink.

  The packaging bag for a curable composition according to the present invention stores two or more kinds of contents in a state of being separated from each other, and discharges the contents in one place. In this curable composition packaging bag, the contents can be taken out and mixed in a series of operations. The sheet member forming the exterior of the curable composition packaging bag has at least one barrier layer in consideration of airtightness, light shielding properties, and gas barrier properties. Thereby, the quality of the curable composition during storage and transportation is kept constant, and leakage of the contents during transportation is prevented. Since it is made of a sheet member, its weight is light and its volume as waste is small.

A curable composition packaging bag (hereinafter referred to as “packaging bag”) 1 according to a first embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the packaging bag 1 has a shape in which the sheet members S are overlapped and the outer peripheral portion 2 excluding the inlet 6 is sealed by heat sealing. Moreover, the packaging bag 1 has the division part 3 heat-sealed along the vertical direction in the part in the width direction of the packaging bag 1 in FIG. The partition part 3 partitions the inside of the packaging bag 1 into two storage chambers A ₁ and A ₂ . In addition, in the figure, the part heat-sealed in the state before inject | pouring the content is shown by hatching.

Nozzle portions N ₁ and N ₂ are formed below the storage chambers A ₁ and A ₂ . The storage chambers A ₁ and A ₂ are formed in a tapered shape that narrows from both sides toward the tips of the nozzle portions N ₁ and N ₂ . Note that the tapered shape is sufficient if at least one side of at least one of the storage chambers A ₁ and A ₂ is tapered toward the nozzle portion.

When the nozzle portions N ₁ and N ₂ are bent around the partition portion 3 serving as a boundary portion between the storage chambers A ₁ and A ₂ and the bent portion D provided in the range including the vicinity thereof, the nozzle portions N ₁ and N ₂ Has been placed. That is, the nozzle portions N ₁ and N ₂ are disposed at substantially the same distance E from the bent portion D, respectively. Further, the nozzle portions N ₁ and N ₂ are disposed on the same side as the end portion of the partition portion 3.

The tips of the nozzle portions N ₁ and N ₂ are closed while the contents are stored in the storage chambers A ₁ and A ₂ by heat sealing. When taking out the contents, the tips of the nozzle portions N ₁ and N ₂ are opened by cutting along the dashed line C in the figure. Nozzle portions N ₁ and N ₂ are straightly formed within a certain range from the tip so that the nozzle diameter is the same regardless of where the tip is cut from the dot-dash line C.

The inlet 6 provided in the outer peripheral part 2 on the side opposite to the nozzle parts N ₁ and N ₂ is opened until the contents are put into the storage chambers A ₁ and A ₂ . After the contents have been injected into the storage chambers A ₁ and A ₂ , the inlet 6 is sealed by heat sealing in the area outside the dotted line in the figure.

The packaging bag 1 formed as described above is suitable as a container for storing a curable composition as a content. Specifically, a two-component mixed resist ink composed of a main agent and a curing agent is stored as contents. Put main agent in one of the housing chamber A _1, add the curing agent in the other housing chamber A _2.

  Next, a method for taking out the contents stored in the packaging bag 1 will be described by taking as an example the case of storing a two-component mixed resist ink that is a curable composition.

When the main agent and the curing agent are taken out and used, folding is performed so that the storage chambers A ₁ and A ₂ are overlapped with each other by folding along the partition portion 3 between the storage chamber A ₁ and the storage chamber A _2. Perform the overlapping process. Then, with the nozzle section _N 1, _{N 2} of each of the storage chambers _A 1, _{A 2} are overlapped, carried out unsealing process cutting along the tip of the nozzle portion _N 1, _{N 2} to the dashed line C shown in FIG. 1 To do.

By the way, the nozzle section N _1, N ₂ each other, are opened in a state in which were received in one place. In addition, after performing an opening process, you may implement a folding process. Finally, as crush the storage chamber A _1, the packaging bag 1 with A ₂ is folded, to implement the storage chamber A _1, the discharge step of the main agent was placed in A ₂ squeeze curing agent. By performing the discharging process, the main agent and the curing agent are discharged from the packaging bag 1 substantially simultaneously.

Since the squeezed main agent and curing agent are brought to one place by the nozzle portions N ₁ and N ₂ and discharged, the operation of transferring the contents to the mixing container is simple. Since the main agent and the curing agent are squeezed simultaneously, the resist ink can be kneaded immediately.

  A curable composition packaging bag 1 according to a second embodiment of the present invention will be described with reference to FIG. In addition, about the structure which has the same function as the packaging bag 1 for curable compositions of 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the packaging bag 1 shown in FIG. 2, the corner | angular part 7 formed in the outer peripheral part 2 is formed in a circle | round | yen so that the sheet | seat member S may not be damaged even if it contacts with another packaging bag. Therefore, it is possible to prevent the corner portion 7 of the packaging bag 1 from damaging the sheet member S of another packaging bag 1 during transportation or packing operation.

Moreover, the outer peripheral part 2 is excised according to the taper shape of the nozzle parts N ₁ and N ₂ . By forming in this way, it is possible to prevent the outer peripheral portion 2 from being greatly undulated even when the contents are inserted, and to reduce the cutting amount of the sheet member S. Moreover, since both the outer sides of the nozzle portions N ₁ and N ₂ are cut into different shapes, when the packaging bag 1 is set in the two-pack filling device that fills the packaging bag 1 with the main agent and the curing agent, packaging is performed. The bag 1 can be set in the correct direction. Therefore, it is possible to prevent the main agent and the curing agent to be injected into the storage chambers A ₁ and A _{2 from} being erroneously injected in the opposite direction.

The partition part 3 provided between the inlet 6 and the taper part of the storage chambers A ₁ and A ₂ is more than the partition part 3 provided between the taper part and the tips of the nozzle parts N ₁ and N _2. It is thin. One of the edges of the partition part 3 is aligned in a straight line from the tip side of the nozzle parts N ₁ and N ₂ to the injection port 6 side.

  Since the partition part 3 is a part where the sheet member S is overlapped and heat-sealed, the partition part 3 is higher in strength than the part where the sheet member S is overlapped. Therefore, when performing a folding process, the bending part D is easy to be formed in the side in which the edge of the division part 3 is aligning linearly. That is, the bent portion D is formed at a predetermined position.

The widths W ₁ and W ₂ of the storage chambers A ₁ and A ₂ are determined according to the weight mixing ratio of the main component and the curing agent of the two-component mixed curable composition that is the contents. However, since the volumes of the storage chambers A ₁ and A ₂ change depending on the swelling, the widths W ₁ and W ₂ are not necessarily proportional to the mixing ratio.

  The packaging bag 1 for curable compositions of the 3rd Embodiment which concerns on this invention is demonstrated with reference to FIG. In addition, the structure which has the same function as the packaging bag 1 for curable compositions of 1st or 2nd embodiment attaches | subjects the same code | symbol, and abbreviate | omits the description.

The packaging bag 1 shown in FIG. 3 includes two compartments 3 and three storage chambers A ₁ , A ₂ , A ₃ partitioned by these compartments 3. The nozzle portions N ₁ , N ₂ , N ₃ of the storage chambers A ₁ , A ₂ , A ₃ are arranged side by side on the same side on the same side as one end portion of the partition portion 3.

The nozzle portions N ₁ , N ₂ , N ₃ are arranged such that the adjacent nozzle portions N ₁ and N ₂ , N ₂ and N ₃ are arranged at the same distances L ₁ and L ₂ from the bent portion D with the bent portion D as the center. Yes. Therefore, when the folding process is performed on the storage chambers A ₁ , A ₂ , A ₃ , the nozzle portions N ₁ , N ₂ , N ₃ are brought to one place by overlapping each other.

Therefore, the contents are obtained by performing the folding process, the opening process, and the discharging process by injecting in advance the multi-liquid mixed curable composition to be mixed in the storage chambers A ₁ , A ₂ , A ₃ at a fixed ratio. A multi-component mixed curable composition having an ideal mixing ratio can be obtained simply by squeezing the product. As an example of the contents separated and packaged as a multi-component mixed curable composition in the packaging bag 1, there is a combination of a main agent, a curing agent, and a diluent.

As mentioned above, the packaging bag 1 of 1st- 3rd embodiment is some examples which represent a packaging bag provided with a packaging means, a division means, and a discharge means. The packaging means has at least one barrier layer. The barrier layer has at least one of sealing property, light shielding property, and airtightness. The partition means partitions the interior of the packaging means into a plurality of storage chambers. The discharge means brings out the contents stored in each of the storage chambers to one place and takes them out.

That is, the sheet member S is an example of packaging means. The partition unit 3 is an example of a partition unit. The nozzle portions N ₁ , N ₂ , and (and N ₃ ) that overlap each other in a state where the packaging bag 1 is folded are an example of the discharge means.

A laminated sheet material which is interposed between the metallic thin film layer such as A Rumi foil or aluminum deposited layer synthetic resin sheet layer as the sheet member S. If cracks of the metal thin film layer is found before use, whether debris caused by the cracks is mixed in a storage chamber A _1, A 2 _(and A ₃₎ fine foreign matter in the contents to be housed in It is desirable that it can be confirmed. In such a case, a sheet material having a structure in which the sealant layer and the barrier layer are in close contact with each other by easy peeling means is used as the sheet member S. The sealant layer is formed of a heat-sealable synthetic resin. The barrier layer has at least one metal thin film layer. The easy peeling means adheres the sealant layer and the barrier layer with an adhesive strength that allows the sealant layer and the barrier layer to be peeled by hand.

  The following can be listed as synthetic resins that can be heat sealed. Polyolefin (ex. Polyethylene, polypropylene, polybutene, polypentene, etc.); Polyester (ex. Polyethylene terephthalate, polybutylene terephthalate etc.); High molecular weight thermoplastic resin (ex. Polyamide). These synthetic resins may constitute a sealant layer by a single layer or a plurality of layers laminated by freely combining different types. Note that these synthetic resins can be made to have low, medium, high density, or crystallinity at the time of resin synthesis.

  As an easy peeling means, there is a method of combining so that the adhesive force between the synthetic resin layers to be laminated becomes small. In addition, as an easy peeling means, a method of partially applying an adhesive on the laminated surface, an adhesive used for laminating, or a method of blending a peeling agent such as silicone in the synthetic resin layer to be laminated, is itself bonded. A method using an adhesive with a small force, a method of reducing the amount of adhesive applied, and the like may be used.

  In consideration of the above contents, the following structure can be given as an example of the laminated structure of the sheet material employed as the sheet member S of the packaging bag 1. The sealant layer and the barrier layer are laminated via an extruded polyethylene layer. And the synthetic resin layer (henceforth a peeling layer) which can be easily peeled with respect to a polyethylene layer is provided in the interface of an extruded polyethylene layer and at least any one of a sealant layer and a barrier layer.

  As the peeling layer, polyolefins other than polyethylene, polyamides such as nylon, polyesters such as polyethylene terephthalate and polybutylene terephthalate, and films made of them can be suitably used. These films are easy to handle as laminated members that are easily peeled when stretched. In particular, biaxially stretched polyethylene terephthalate is easy to make a laminated member that can be easily peeled, has excellent strength, and is inexpensive. In addition, it is desirable that this peeling layer is not subjected to an adhesion improving treatment such as a corona treatment on the interface side with the extruded polyethylene layer.

  On the other hand, the barrier layer includes at least one metal thin film layer. By providing a barrier layer including a metal thin film layer, gas barrier properties and light shielding properties are added or improved. Accordingly, it is possible to prevent the curable composition from undergoing a polymerization reaction due to ultraviolet rays or the like, the solvent to be volatilized, and the contents from being gelled, denatured or discolored due to this.

  As the metal thin film layer, a foil or vapor deposition layer of aluminum, stainless steel, iron, copper, nickel, lead or the like can be used. Aluminum foil or an aluminum vapor deposition layer is preferable as the metal thin film layer because it is inexpensive and has excellent light shielding performance.

  A protective layer is provided as an outer layer of the barrier layer so that a metal thin film layer such as an aluminum foil is not exposed to the outermost part. As the protective layer, polyolefin, polyester, polyamide or the like can be used. These are formed into a film or a sheet, and when stretched, the strength is improved. Polyester has an excellent effect of preventing damage to a metal thin film layer such as an aluminum foil during transportation. In particular, when a polyester layer is provided on the contact surface side with the aluminum foil, this effect is great.

  On the peeling layer provided in at least one of the sealant layer and the barrier layer, the extruded polyethylene layer is adhered so as to be peelable from the peeling layer by extrusion lamination of polyethylene. Further, the strength of the sheet member S can be improved.

  The sealant layer and the barrier layer are produced by laminating by a known method in advance using dry laminate or extrusion laminate alone or appropriately in combination. A peeling layer is laminated on at least one of the sealant layer and the barrier layer. The extrusion lamination of polyethylene can be easily performed on the peeling layer by an extrusion lamination method or a dry lamination method.

  The sheet | seat member S of the packaging bag 1 has laminated | stacked the sealant layer made from the synthetic resin layer in which an inner surface can be heat-sealed, and the barrier layer containing a metal thin film layer so that peeling is possible. Therefore, if bending marks or cracks are found in the metal thin film layer before use, the metal thin film layer debris can be removed from the crack by immediately peeling off the barrier layer including the metal thin film layer during transportation or handling. It can be easily confirmed whether or not it is mixed in.

  In order to verify the performance of the packaging bag 1, a steel can or a plastic container was used as an outer container, and a plurality of packaging bags 1 filled with a curable composition were randomly packed and transported. As a result, it was confirmed that the packaging bag 1 can obtain sufficient safety and strength without the sheet members S being peeled from each other or the sheet member S being not perforated.

  The thicker the total thickness of the sheet material used as the sheet member S of the packaging bag 1, the better the gas barrier property, light shielding property, and wear resistance. However, when the thickness is larger than 300 μm, the sheet member S becomes hard, so that handling becomes difficult. On the other hand, when the thickness is less than 30 μm, wear resistance, penetration resistance, and the like are lowered, so that holes are easily opened during transportation. That is, it is known that when the sheet member S is thinner than 30 μm or thicker than 300 μm, it is not suitable as a packaging bag 1 for storing a curable composition such as resist ink. Accordingly, the thickness of the sheet member is preferably 30 μm or more and 300 μm or less.

  The thicker the metal thin film layer, the better the gas barrier property, light shielding property, and strength as a packaging bag. However, the upper limit of the thickness of the metal thin film layer is naturally limited by the total thickness of the sheet material and the flexibility as the sheet member S. On the other hand, when the thickness of the metal thin film layer is less than 5 μm, the metal thin film layer itself tends to have a hole (pinhole) during transportation.

  In addition, the strength as the packaging bag 1 can be improved by appropriately selecting the combination and thickness of each layer of the sheet member S.

  One of the curable compositions stored in the packaging bag as the contents, for example, the main agent, may contain a radically polymerizable component. A radical reaction that occurs in a material containing a radically polymerizable component due to heat, ultraviolet rays, or the like is suppressed by oxygen radicals contained in air. That is, the material containing the radically polymerizable component can be prevented from being polymerized by preventing the curable resin and the monomer component in the material from being polymerized by being exposed to air.

Therefore, if the content containing the radical polymerizable component is filled into the storage chamber A ₁ (or A ₂ ) of the packaging bag 1 together with air, the polymerization of the radical polymerizable component is suppressed by oxygen inhibition. As a result, the radically polymerizable composition (main agent) does not gel during storage, and the packaging bag 1 can ensure the temporal stability of the radically polymerizable composition.

As the amount of air, an effect is seen at 1% or more with respect to the capacity of the radical polymerizable composition to be filled. However, if it exceeds 50%, the volume of the packaging bag 1 itself increases, which is not preferable because it is not suitable for packaging. Moreover, it is difficult to manage the air amount of several percent. When the radically polymerizable composition is poured into the storage chamber A ₁ (or A ₂ ) from the inlet 6 of the packaging bag 1 and then the outer peripheral portion 2 is heat-sealed, the air amount is in the range of 5% to 30%. .

As described above, the curable composition packaging bag 1 according to the present invention can take out a plurality of liquids at a predetermined ratio by one squeezing operation. Further, the subsequent mixing can be performed very smoothly by a series of operations. Moreover, the packaging bag 1 of this invention is excellent in light-shielding property and gas-barrier property, can ensure the temporal stability of a curable composition, and can ensure the safety | security and quality at the time of transport. Further, when the packaging bag 1 is discarded after use, the packaging bag 1 can be folded small, so that it is not bulky and considers the environment. Since the packaging bag 1 is formed by overlapping and heat-sealing the sheet member S, the contents can be easily discharged by flattening. That is, since the amount remaining in the storage chambers A ₁ , A ₂ , A ₃ is small, it is most suitable as a packaging bag 1 of a curable composition such as resist ink, adhesive, paint, and printing ink. In particular, when a multi-component mixed curable composition is stored in accordance with the mixing ratio, the contents can be provided without causing an error in the mixing ratio.

  The packaging bag which concerns on this invention can be used as a container which isolate | separates and stores each content mixed when two or more types of liquid materials and fluid powder are used.

It is a top view which shows the packaging bag for curable compositions of 1st Embodiment which concerns on this invention. It is a top view which shows the packaging bag for curable compositions of 2nd Embodiment which concerns on this invention. The third embodiment the curable composition packaging bag of the present invention Ru plan view showing.

Claims (6)

A sheet member (S) having at least one barrier layer;
Two or more storage chambers (A ₁ , A ₂ , A ₃ ) formed by overlapping and heat-sealing the sheet member (S);
A partition (3) that partitions the adjacent storage chambers (A ₁ , A ₂ , A ₃ ),
The storage chambers (A ₁ , A ₂ , A ₃ ) store a resist ink containing a radical polymerizable component together with air and bend the boundary portion (3) as a boundary to store the storage chambers (A ₁ , A ₂ , A ₃ ) A nozzle part (N ₁ , N ₂ , N ₃ ) for taking out the resist ink is placed on the same side as one end of the partition part (3) in the outer peripheral part (2) that overlaps with each other in a stacked state. Each has
The sheet member (S) includes a sealant layer formed of a heat-sealable synthetic resin, a barrier layer having at least one metal thin film layer, and the sealant layer and the barrier layer having a peelable adhesive strength by hand. And when the metal thin film layer is found to have bending marks or cracks, the barrier layer is peeled off from the sealant layer to check whether fragments of the metal thin film layer are mixed in the resist ink. A packaging bag for a curable composition (1), comprising: an easy peeling means prepared . In the packaging bag (1) for curable compositions according to claim 1,
The easy peeling means is
A polyethylene layer laminated between the sealant layer and the barrier layer;
A peeling layer that can be easily peeled off from the polyethylene layer is included in at least one of the space between the sealant layer and the polyethylene layer and between the polyethylene layer and the barrier layer. In the packaging bag (1) for curable compositions according to claim 1 or 2,
The sheet member (S) has a thickness of 30 μm or more and 300 μm or less.
It is characterized by that. In the packaging bag (1) for curable compositions according to claim 1 or 2,
At least one of the storage chambers (A ₁ , A ₂ , A ₃ ) is formed in a tapered shape in which at least one side is narrowed toward the tip of the nozzle part (N ₁ , N ₂ , N ₃ ). It is characterized by. In the packaging bag (1) for curable compositions according to claim 1 or 2 ,
_Two storage chambers (A ₁ , A ₂ ) are provided,
As the resist ink, a two-component mixed resist ink composed of a main agent and a curing agent is accommodated. In the packaging bag (1) for curable compositions according to claim 1 or 2 ,
The air is characterized by the this is 30% or less than 5% by volume ratio to the resist ink.

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