JP3987290B2 - Composite material container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container made of a composite material mainly composed of pulverized paper or pulp which is a raw material of paper, which is friendly to the natural environment and useful for resource saving.
[0002]
[Prior art]
Containers filled with liquid or powdery substances such as shampoos and kitchen detergents are generally used in many cases using resins such as polypropylene. In an attempt to recycle resources, such containers are used as they are and only the contents are refilled. In recent years, there are many products for that purpose in the market.
[0003]
By the way, the resin containers are not always reused and may be discarded. In such a case, the processing is not easy, and it is useful from the viewpoint of resource saving. I can't say that.
[0004]
On the other hand, used paper such as newspapers and corrugated cardboard is easy to process and relatively inexpensive, so it has been used for recycling for a long time. Recently, paper has also been used in this type of container. However, the demand is increasing more and more, especially for paper containers filled with liquid substances, various measures have been taken to improve liquid leakage and the strength of the containers, but the inherent weaknesses of paper are resolved. It has not yet reached.
[0005]
[Problems to be solved by the invention]
An object of the present invention has been made in view of the above-described conventional problems, and can be reused, saved resources, and disposed of used containers. However, we are proposing a new environmentally friendly container that can be disposed of relatively easily.
[0006]
[Means for Solving the Problems]
The present invention provides a container having an opening for filling the contents, the container, the container body is kneaded with 3000 mu m or less paper formed on the size of the ground product or pulp which a resin of paper material Made of composite material
The composite material contains more than 50 mass % of paper pulverized material or paper raw material pulp, and contains at least one selected from polyolefin resins, acid-modified polyethylene and acid-modified polypropylene using a metallocene catalyst. A composite material container characterized by containing in a range of 5 to 35 mass% with respect to a pulverized paper or pulp.
[0007]
In the container having the above-described configuration, it is preferable that the container body has an inner layer made of resin on the inner side, and this inner layer is a bag whose volume can be increased or decreased depending on the filling degree of the contents. It can consist of a shape body.
[0008]
Moreover, it is preferable that a container main body shall be equipped with the outer layer which consists of resin in the outer side.
[0009]
Further, the present invention provides a container having an opening for filling the contents, the container, the container body, 3000 mu pulverized paper equal to or less than a size m or resin pulp as a paper material a layer of kneading formed by composite materials with, Ri Do a laminate formed by laminating a resin coating layer,
The laminate, including the coating layer, contains more than 50 mass % of pulp as a crushed paper or paper raw material as a whole container ,
The composite material contains at least one selected from a polyolefin resin using a metallocene catalyst, acid-modified polyethylene and acid-modified polypropylene in a range of 5 to 35 mass % with respect to a pulverized paper or pulp . This is a composite material container.
[0010]
The composite material is mainly composed of pulverized paper or pulp as a raw material of paper, specifically, pulverized paper or pulp as the raw material exceeds 50 mass% (excluding 50 mass%) to it, more preferably, to less 80 mass% exceeded 50 mass%.
[0011]
The composite material preferably contains a large number of bubbles, and the bubbles are preferably foamed with a foaming agent such as polyester.
[0012]
For resins to be kneaded with pulverized paper and pulp, heat such as polyethylene, polypropylene, polystyrene, polyester (including PET and PBT), nylon, polyacrylonitrile, ethylene vinyl alcohol resin, acid-modified polyethylene, acid-modified polypropylene, elastomer, etc. A plastic resin can be applied, but the present invention is not limited to this.
[0013]
The size of the pulverized paper or the pulp used as the raw material of the paper is 3000 μm or less, preferably 1500 μm or less, more preferably 500 μm or less in order to realize more advantageous forming.
[0014]
In addition, in the composite material in which pulverized paper and pulp are kneaded with resin, it is selected from polyolefin resin, acid-modified polyethylene and acid-modified polypropylene using metallocene catalyst for the purpose of improving impact strength. It is preferable to contain at least one selected from the group consisting of 5 to 35 mass % of the pulverized paper or pulp .
[0015]
Specifically, polyethylene, polypropylene, polystyrene, polyester (including PET and PBT), nylon, polyacrylonitrile, ethylene vinyl alcohol resin, acid-modified polyethylene, acid-modified polypropylene, and elastomer can be applied to the outer layer and inner layer. . When a container is manufactured by applying an extrusion molding method, a resin having a melt index of 20 g / 10 min or less, which is an index of moldability, is particularly advantageously adapted. Here, the melt index is defined as the number of grams in a thermoplastic resin extruded through a 0.0825 in (2.0955 mm) orifice at a temperature of 190 ° C. with a load of 1260 g in a case of polyethylene resin, etc. For other resins, conditions are defined for each resin.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIG. 1 shows a container made of a composite material according to the present invention, wherein 1 is a container body made of a composite material obtained by mixing a pulverized paper or pulp as a raw material (hereinafter simply referred to as paper etc.) together with a resin. Reference numeral 2 denotes an opening formed integrally with the container body 1, and a screw on which a screw-type cap can be attached can be provided on the outer peripheral surface of the opening 2. An undercut is provided when a cap-type cap is mounted instead of the cap of the type.
[0017]
Although the container shown in FIG. 1 is a single layer and its cross-sectional structure is somewhat different from that of a conventional container, the container body 1 is mainly composed of paper or the like, that is, contains over 50% of paper or the like. The amount of resin used is extremely small. For this reason, it is possible to save resources, and the resin used here functions as a reinforcing material for paper and the like, and has higher strength than a single paper container, and is liquid or powdery. As a container filled with things, it can withstand practically enough.
[0018]
2 to 4 show other configuration examples of the container according to the present invention.
FIG. 2 shows a structure provided with an inner layer 3 made of a resin that is in close contact with the inside of the container body 1 and accommodates contents inside the container body 1.
[0019]
A container having such a structure is useful particularly when the contents are liquid and there is a concern about penetration into the container body 1. In this case, it is necessary to allow a slight increase in the amount of resin used in comparison with the structure of FIG. 1, but the inner layer 3 is thin as long as the container body 1 has a desired strength. Therefore, the amount of use can be significantly reduced compared to conventional resin containers.
[0020]
FIG. 3 shows an example in which an outer layer 4 made of a resin is provided to hide the entire area outside the container body 1. A container having such a structure is suitable for filling a powdery content, and is particularly useful when there is a concern about intrusion of moisture or the like from the outside. In this case as well, it is necessary to allow a slight increase in the amount of resin used as compared with the structure of FIG. 1, but the thickness of the outer layer 4 is sufficient as long as the container body 1 has a desired strength. Can be made thinner, and the amount of use can be significantly reduced compared to conventional resin containers.
[0021]
FIG. 4 is a combination of the inner layer 3 and the outer layer 4 shown in FIGS. 2 and 3, and in such a three-layer container, not only can the quality of the contents be maintained for a long period of time, but also paper or the like. Since there is no moisture absorption, the shape retention of the container itself can be remarkably improved.
[0022]
In the example having the resin inner and outer layers 3 and 4 as shown in FIGS. 2 to 4, by using the same resin as that used for the container body 1, it is possible to carry out any measures during molding. Although it is possible to improve the adhesion between those layers, even when using resins of different properties between them or even when using the same resin, An adhesive layer can be provided between the layers.
[0023]
FIG. 5 shows another configuration example of the container according to the present invention.
In this example, a container body 1 made of a composite material is provided with a large number of bubbles 5 that can be formed of a foaming agent such as polyester. By providing such bubbles, the bubbles 5 The strength of the container body 1 itself can be increased by the bridge effect. In addition, the weight can be reduced, and the amount of resin used for the container body 1 can be reduced without reducing the strength of the container.
[0024]
FIG. 6 shows a modified example of the container having the structure shown in FIG. 2, and the container is such that the inner layer 3 is peeled off from the inner wall according to the degree of filling of the contents, and the volume is increased or decreased. This is a so-called delamination type container (hereinafter simply referred to as a delamination container) to which a bag-like body that can be used is applied. In such a delamination container having the inner layer 3, the inner layer 3 is deformed as the contents are reduced, and the ratio of the contents filled in the container to the air can be reduced, so that the quality is stable. Contents that are useful when the pump is pumped and the contents are dispensed with the pump instead of the cap that seals the opening 2. Almost all of them can be poured out without leaving anything. In addition, when the inner layer 3 is a single layer in order to guide the sure deformation of the inner layer 3 in the delamination container, between the container body 1 and the inner layer 3 and when the inner layer 3 has a laminated structure, between the layers It is preferable to provide at least one adhesive layer in the form of a vertical strip extending along the axial direction of the container.
[0025]
The delamination container needs to supply and discharge outside air between the inner layer 2 and the container main body 1 in order to guide a smooth increase / decrease in the volume of the inner layer 2. For this reason, as shown in FIG. It is necessary to provide an opening K for supplying and discharging outside air.
[0026]
Such an opening K is shown in FIG. 6 as an example provided in the outer peripheral surface of the opening 2, but it can also be provided in the bottom or body of the container. In particular, the inner layer 2, the container body 1, If there is a concern about the intrusion of water or the like during this period, a large number of continuous bubbles that lead to the front and back surfaces of the container body 1 are formed, and the outside air is removed in the manner shown by the arrows in FIG. Supply and discharge can be performed.
[0027]
The container according to the present invention can be produced by blow molding (hollow blow molding method, biaxial stretch blow molding method, etc.) of a molded body formed by extrusion molding or a parison previously molded by injection molding, It can be manufactured by appropriately applying a thermoforming method such as pressure forming or vacuum forming, and the container of the present invention includes a blow bottle, a thermoform, an injection, a tube, a biaxial stretch blow container, and an injection blow container. Shall be included. FIG. 8 schematically shows the appearance of a container that can be molded by a thermoform or an injection method, and FIG. 9 schematically shows the appearance of a tube container.
[0028]
In order to form a bottle type container having three layers as shown in FIG. 4 above, first, a concentric triple hollow cylinder (parison) having a desired thickness and length is formed by extrusion molding. Then, the hollow cylindrical body is mounted in a mold so as to form an opening and a container bottom, and blow-molded.
[0029]
In particular, when the container according to the present invention is manufactured by extrusion molding, even when the same resin is used, the stretching behavior differs between the inner and outer layers of the resin alone and the layer of the composite material. Therefore, the composite material layer can contain nylon or the like as a modifier.
[0030]
When it is difficult to extrude each layer (inner and outer layers and the layer of composite material corresponding to the container body) at the same time in the extrusion molding, the inner layer and the outer layer are sprayed with the coating liquid on the container body 1 or the container body. It can also be formed by dipping 1 itself into a coating solution.
[0031]
In FIG. 4, a three-layer structure is shown as an example. However, the present invention is not limited to these, and although not shown, for example, a composite material layer and a resin-made layer are used. It is also possible to configure a container composed of a laminate in which a plurality of layers (coating layers) are laminated. The container composed of such a laminate is, for example, an ultra-multilayer as disclosed in US Pat. No. 5,094,793. It can manufacture by applying a molded object manufacturing technique. A container made of a laminate manufactured by applying such a technique can make the material's distraction behavior uniform during extrusion, so that the material can be extruded relatively easily and the strength of the container can be further increased. be able to.
[0032]
In particular, in a laminate type container in which a covering layer such as the inner layer 3 and the outer layer 4 is formed of a resin, the entire container including the covering layer becomes a crushed paper or a raw material of paper in order to reduce the amount of resin used It is important to contain the pulp in excess of 50 mass%.
[0033]
As described above, in the present invention, a bottle-type container is shown as an example. It is not something.
[0034]
【The invention's effect】
According to the present invention, the amount of resin used is extremely small, which is advantageous for resource saving. Since the container is mainly made of paper, disposal is relatively easy, and at the time of incineration processing It is extremely friendly to the natural environment.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram of a configuration of a container (single layer) made of a composite material according to the present invention.
FIG. 2 is a view showing another configuration example (two layers) of the composite material container according to the present invention.
FIG. 3 is a view showing another configuration example (two layers) of the composite material container according to the present invention.
FIG. 4 is a view showing another configuration example (three layers) of the composite material container according to the present invention.
FIG. 5 is a view showing another configuration example of a composite material container according to the present invention.
FIG. 6 is a view showing another configuration example of a composite material container according to the present invention.
FIG. 7 is a diagram illustrating the supply / discharge state of outside air in the composite material container according to the present invention.
FIG. 8 is a view showing the appearance of a container obtained by applying a thermoform or injection method to a composite material container according to the present invention.
FIG. 9 is a view showing a container made of a composite material according to the present invention as a tube container.
[Explanation of symbols]
1 container body 2 opening 3 inner layer 4 outer layer 5 bubble K opening

Claims (8)

A container having an opening for filling the contents, the container, the container body, the pulp to be 3000 mu m or less paper formed on the size of the ground product or paper material of a composite material obtained by kneading with a resin Become
The composite material contains more than 50 mass % of paper pulverized material or paper raw material pulp, and contains at least one selected from polyolefin resins, acid-modified polyethylene and acid-modified polypropylene using a metallocene catalyst. A composite material container characterized by containing 5 to 35 mass% of the pulverized paper or pulp.   The container body is a composite material container according to claim 1, wherein the container body includes an inner layer made of a resin.   The composite material container according to claim 2, wherein the inner layer is made of a bag-like body whose volume can be increased or decreased depending on the degree of filling of the contents.   The container body is a composite material container according to any one of claims 1 to 3, wherein the container body includes an outer layer made of a resin on an outer side thereof. A container having an opening for filling the contents, the container, the container body is made of pulp as a 3000 mu m or less paper formed on the size of the ground product or paper material and kneaded with a resin composite a layer of material, Ri Do a laminate formed by laminating a resin coating layer,
The laminate, including the coating layer, contains more than 50 mass % of pulp as a crushed paper or paper raw material as a whole container ,
The composite material contains at least one selected from a polyolefin resin using a metallocene catalyst, acid-modified polyethylene and acid-modified polypropylene in a range of 5 to 35 mass % with respect to a pulverized paper or pulp . A composite material container.   The composite material container according to any one of claims 1 to 5, wherein the composite material contains a large number of bubbles.   The container made of a composite material according to claim 6, wherein the bubbles are foamed with a foaming agent.   Resin has a melt index 20g / 10min The composite material container according to any one of claims 1 to 7, which is a thermoplastic resin to be described below.

Images