JP5215715B2 - Container - Google Patents

Description

  The present invention relates to a storage body.

  For example, a seedling container such as a seedling container or a CD case formed of a biodegradable material made of a mixture of paper fiber, starch-based binder and water using the technique described in Patent Document 1 of the prior application of the applicant There is a technique for manufacturing the material by extrusion molding or injection molding.

Japanese Patent No. 3261368

  By the way, since the said storage container is excellent in environmental property, the utilization field is expanding in recent years, and the further improvement of durability and water resistance (waterproofness) is calculated | required.

  In view of the present situation as described above, the present invention, as a result of various experiments, by integrating a sheet material made of the same material containing paper fibers into the container formed of the biodegradable material by insert molding, It has been completed by finding out that the durability and water resistance of the storage body can be improved easily and at low cost, and it has excellent durability and water resistance and can be manufactured at low cost. Provide the body.

  The gist of the present invention will be described with reference to the accompanying drawings.

A storage body made of a biodegradable material composed of a mixture of paper fiber, starch-based binder and water, and the storage body 1 has a durability or water resistance within a predetermined range on the inner surface side. The sheet material 2 made of paper or the sheet material 2 made of the biodegradable material is integrated by insert molding, and the storage body 1 is superposed on the base 3 and the base 3. A storage body comprising a cover portion 4 and a hinge portion 5 connected to each other, wherein the sheet material 2 is integrated so as to cover the hinge portion 5 and the vicinity thereof. It is concerned.

Further, in the container of claim 1, wherein said base portion 3 and the lid portion 4 constituting the container 1 is integrally molded so as to have a fold 6 between the base 3 and lid 4 The fold 6 is set in the hinge part 5 and is related to a storage body.

Moreover, in the storage body according to any one of claims 1 and 2 , the storage body 1 is formed by adding 100 parts to 50 parts by weight of the paper fiber and 10 parts by weight of the starch-based binder. Storage characterized by being formed of a kneaded material obtained by adding 0.2 to 2.0 parts of a non-alkali metal long-chain fatty acid salt to 100 parts of a mixture obtained by adding 50 to 200 parts of water It relates to the body.

Moreover, the storage body according to any one of claims 1 to 3 , wherein the starch-based binder is obtained by replacing 10 to 50% (by weight) of the starch binder with polyvinyl alcohol. It relates to the storage body.

Further, in the storage body according to any one of claims 1 to 4 , the storage body 1 and the sheet material 2 are integrated while being heated and being partially mixed with each other while being pressurized. The present invention relates to a storage body characterized in that

  Since this invention was comprised as mentioned above, it becomes the storage body excellent in durability and water resistance (waterproofness), and excellent in the practicality which can be manufactured at low cost.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

The inner surface of the connecting portion to be movable with the base portion 3 of the container 1 and the lid portion 4 (hinge 5 and its vicinity), paper sheet material 2 or paper fibers and starch-based binder and a mixture of water By integrating the sheet material 2 made of biodegradable material by insert molding, the durability and water resistance (waterproofness) of the container 1 can be improved while being manufactured (integrated molding) as in the past. It becomes possible.

  In particular, the storage body 1 includes paper fibers, and the sheet material 2 integrated into the storage body 1 is also made of paper or includes paper fibers. Therefore, both are the same kind of material including paper fibers. It is well integrated by insert molding, and therefore has excellent bonding strength (adhesiveness) compared to the case where different types of materials are integrated. Therefore, the durability and water resistance are greatly improved. The advantage of being environmentally friendly remains the same.

  Therefore, it becomes possible to impart durability and water resistance that are extremely simple and cost-effective to movable parts and water-resistant parts of the storage body, and is formed of a biodegradable material with excellent environmental properties. It becomes possible to promote further utilization of the storage body.

  Specific embodiments of the present invention will be described with reference to the drawings.

  The present embodiment is a storage body formed of a biodegradable material composed of a mixture of paper fiber, starch-based binder and water, and the storage body 1 has a predetermined range on the inner surface side of the storage body 1. The paper sheet material 2 or the biodegradable material sheet material 2 imparting durability or water resistance is integrated by insert molding.

  Specifically, 50 to 90 parts of paper fiber and 10 to 50 parts of a starch-based binder obtained by replacing 10 to 50% (weight) with polyvinyl alcohol by injection molding, 50 to 50 parts of water. A kneaded product obtained by adding 0.2 to 2.0 parts of a non-alkali metal long-chain fatty acid salt to 100 parts of a mixture obtained by adding 200 parts is filled in a mold and dried by heating to form a container 1. At this time, the kneaded material is filled in a state where the sheet material 2 is loaded in a mold (by so-called known insert molding), and the sheet material 2 is integrated at the same time as the container 1 is molded. In other words, the starch-based binder of the container 1 is inserted between the pulp fibers of the sheet material 2 by applying pressure with a mold to dry and integrate them in a partially mixed state. Is.

  Each part will be specifically described.

  As shown in FIGS. 1 and 2, the storage body 1 is formed by connecting a base portion 3 and a lid portion 4 superposed on the base portion 3 via a bendable hinge portion 5. The sheet material 2 is integrated so as to cover the continuous end portions of the portion 5 and the base portion 3 and the lid portion 4.

  The base 3 is provided on the base plate 7 having a rectangular shape in plan view, the rising wall 8 provided on the rear side of the base plate 7, and the left and right sides adjacent to the rear side. It consists of rising walls 9 and 10 whose height gradually decreases toward the side.

  The lid portion 4 is a fixed-side rising wall 12, 13, 14 provided on the left and right side portions and the front side portion adjacent to the rear side portion of the lid side flat plate body 11 having a rectangular shape in plan view. It consists of and.

  The storage body 1 is integrally formed so as to have a linear fold 6 between the upper end portion of the rising wall 8 provided on the rear side portion of the base side flat plate body 7 and the rear side portion of the lid side flat plate body 11. This fold 6 is set in the hinge portion 5. In addition, when the lid 1 is rotated through the hinge 5 and overlapped with the base 3, the storage body 1 has the rising walls 13 and 14 on the left and right sides of the lid-side flat plate 11 so that the base flat 7 The left and right side rising walls 9 and 10 are overlapped on the outside, and the rising wall 12 on the front side of the lid-side plate 11 is locked with the locking step 15 formed on the front end of the base-side plate 7. Is configured to do.

  The sheet material 2 has a substantially rectangular shape in plan view, and is provided to the full length of the rear side portions of the base side flat plate body 7 and the lid side flat plate body 11 (set to substantially the same length as the rear side portion). The width of the sheet material 2 is set so as to cover not only the hinge portion 5 but also the continuous end portions of the base portion 3 and the lid portion 4 to some extent. For example, the width of the sheet material 2 is set to a width that covers about 10 to 20% of the longitudinal length of the base side flat body 7 and the lid side flat body 11 at the continuous end of the base 3 and the lid 4. Moreover, it is good also as a structure provided in the inner surface whole surface of the storage body 1. FIG.

  The sheet material 2 may be made of any material as long as it is made of paper or made of a mixture of paper fiber, starch-based binder, and water. That is, non-coated paper such as flat paper and cardboard may be used, or coated paper with water resistance and water absorption may be used, or a paper made of the same kneaded material as the container 1 may be used. May be. In this embodiment, flat paper is used.

  Therefore, in this embodiment, the sheet material 2 is integrated with the hinge portion 5 (movable portion) of the storage body 1 as described above, so that the movable portion that is easily fatigued is reinforced, and the sheet material 2 is integrated. The durability against repetitive bending is significantly improved as compared with the case where it is not.

  In the present embodiment, the storage body 1 as described above is employed. However, for example, a storage body 1 having a configuration as shown in FIG. 3 may be employed. Specifically, it is composed of a bottle body 20 for storing a liquid, and the sheet material 2 made of bag-like water-resistant paper (waterproof paper) is integrated along the inner surface of the bottle body 20. You may do it.

  At this time, it is preferable to provide the sheet material 2 on substantially the entire inner surface of the storage body 1, but it is sufficient that the sheet material 2 is provided at least at a portion where the liquid contacts. In this case, the container 1 made of the biodegradable material does not have water resistance at all. However, the water resistance is improved compared to the case where the sheet material 2 is not provided, and water leakage is hardly caused. It has been confirmed that the liquid container 1 is excellent. Further, the sheet material 2 is not limited to water-resistant paper (waterproof paper), and any material may be adopted as long as it is the same type of material that has excellent adhesion to the container 1 as described above. Even when water-resistant paper (waterproof paper) is used, the sheet material 2 is formed because the surface subjected to waterproofing is the liquid side and the surface not subjected to the waterproofing is the inner surface side of the container 1. The adhesion between the container 1 and the container 1 is very good. Therefore, the biodegradable material is responsible for strength, and the water-resistant paper (waterproof paper) is responsible for water resistance (waterproof).

  Hereinafter, the present embodiment will be further described in detail.

  Paper fibers are produced in the state of paper pulp materials obtained from wood, cotton, flax, hemp, cocoons, etc., or used newspapers, magazines, cardboard and other paper, paperboard, cut waste paper, and papermaking processes. Waste paper, such as broken paper, broken paper, dropped paper, used waste paper, etc., can be used, and those finely pulverized can be easily dispersed even when blended as a molding material, and the surface of the molded body It has excellent smoothness and is effective.

  The starch-based binding material (or starch binding material) as a binding material has a molecular structure that is very similar to paper fibers, so that the paper fibers can be firmly bonded and bonded, and the meat of the molded body Even when the thickness is small, it exhibits high strength and high rigidity and is less likely to warp.

  In addition, the molecular structure of polyvinyl alcohol is different from that of paper fiber and starch, but it has the same level of hydrophilic groups as starch, so it has the function of being compatible with starch and binding paper fiber. Furthermore, since it is a long-chain polymer and does not have a branched structure like starch, it has high toughness, and when mixed with starch and used as a binder, toughness can be imparted to the molded product. Therefore, when a starch-based binder obtained by substituting 10 to 50% of starch with polyvinyl alcohol and composited with polyvinyl alcohol is used, a molded article exhibiting excellent toughness and free of cracks can be obtained.

  Since the paper fiber and starch-based binder, which are the main components of the material, are water-soluble, biodegradable and non-chargeable as described above, the molded body is also biodegradable and non-chargeable.

  Non-alkali metal long chain fatty acid salts include calcium stearate, magnesium stearate, zinc stearate, aluminum stearate, strontium stearate, zinc laurate, aluminum laurate, strontium laurate, or a mixture of them. Can easily be mixed with paper fibers and starch homogeneously, exhibits excellent lubricity in the powder state, and can improve workability by lubrication and mold release due to the lubrication effect at the interface From the effective.

  By adding this non-alkali metal long-chain fatty acid salt, the metal salt of this long-chain fatty acid acts as an internal release agent, so that in the step of kneading the material, the material sticks to the wall surface of the kneader. Can be prevented and workability can be improved. This non-alkali metal long-chain fatty acid salt has a surface-active function by a non-polar part based on a fatty acid chain part and a polar part based on a non-alkali metal part, and is insoluble in water and has water repellency, In addition, it is considered that it is caused by having slipperiness in both the molten state and the powder state.

  Moreover, the thing which mix | blended 50-90 parts of paper fibers and 10-50 parts of starch type binders (or starch binder) which substituted 10-50% (weight) of the starch binder with polyvinyl alcohol is used. However, when the amount of the paper fiber is 50 parts or less and the amount of the binder such as starch-based binder is 50 parts or more, the reinforcing effect of the paper fiber is weakened, and a molded product with high mechanical strength cannot be obtained. Absent. On the other hand, when the paper fiber is 90 parts or more and the blending amount of the binder is 10 parts or less, it becomes difficult to sufficiently bond the paper fibers, so that the surface state of the molded body becomes rough and at the same time the mechanical strength of the molded body decreases. It is not preferable.

  In addition, 50 to 200 parts of water is added and kneaded to 100 parts of the mixture of the paper fiber and the binder. When the amount of water added is 50 parts or less, kneading is performed smoothly. It is difficult to break and a load is applied to the kneading, and it is difficult to form a homogeneous kneaded product due to heat generation of the molding material, and it becomes difficult to maintain the shape when the kneaded molding material is made into a pellet or tablet, which is preferable Absent. On the other hand, when 200 parts or more of water is added and kneaded, it becomes an extremely low-viscosity and muddy kneaded material, which is not preferable for use in molding.

  Further, 0.2 to 2.0 parts of non-alkali metal long-chain fatty acid salt is added to 100 parts of the mixture of paper fiber, binder and water. Addition of 2 parts or less is not preferable because the lubricity effect is small, and in the material kneading process, it easily adheres to the wall surface of the kneader, resulting in poor workability, and cracks are easily generated. On the other hand, when 2.0 parts or more of the non-alkali metal long-chain fatty acid salt is added, the friction resistance with the wall of the kneading machine is reduced in the material kneading step, so that it is difficult to knead uniformly in a short time. Therefore, it is not preferable.

  Since the present embodiment is configured as described above, the paper sheet material 2 is integrated with the inner surface of the movable connecting portion (the hinge portion 5 and the vicinity thereof) between the base portion 3 and the lid portion 4 by insert molding. Thus, it is possible to improve the durability and water resistance (waterproofness) of the storage body 1 while manufacturing (integral molding) as in the past.

  In particular, the storage body 1 includes paper fibers, and the sheet material 2 integrated into the storage body 1 is also made of paper or includes paper fibers. Therefore, both are the same kind of material including paper fibers. It is well integrated by insert molding, and therefore has excellent bonding strength (adhesiveness) compared to the case where different types of materials are integrated. Therefore, the durability and water resistance are greatly improved. The advantage of being environmentally friendly remains the same. In addition, in the present embodiment, the starch-based binder of the storage body 1 is put between the pulp fibers of the sheet material 2 by heating while applying pressure by a mold, so that the parts are mixed with each other. Because it is dried and integrated, the bonding strength is further strengthened.

  Therefore, it is possible to impart durability and water resistance to the movable part of the storage body very simply and at a low cost, and further promote the use of the storage body made of biodegradable materials with excellent environmental properties. Can be achieved.

  In addition, although a present Example is the structure which provided the sheet material 2 of 1 sheet, and it has confirmed that this has sufficient durability and water resistance, it is good also as a structure which laminates | stacks the sheet material 2 of multiple sheets. .

  Therefore, the present embodiment is an extremely practical storage body that is excellent in durability and water resistance (waterproofness) and can be manufactured at low cost.

It is a schematic explanatory perspective view of a present Example. It is a partial expanded schematic explanatory sectional view of the present embodiment. It is a schematic explanatory side view in which a part of another example is cut out.

DESCRIPTION OF SYMBOLS 1 Storage body 2 Sheet material 3 Base part 4 Lid part 5 Hinge part 6 Crease

Claims (5)

A storage body made of a biodegradable material composed of a mixture of paper fiber, starch-based binder and water, and a predetermined range on the inner surface side of the storage body has durability or water resistance. The paper sheet material to be applied or the sheet material made of the biodegradable material is integrated by insert molding, and the storage body has a hinge portion with a base portion and a lid portion superposed on the base portion. And the sheet material is integrated so as to cover the hinge portion and the vicinity thereof . 2. The storage body according to claim 1 , wherein the base portion and the lid portion constituting the storage body are integrally formed so as to have a crease between the base portion and the lid portion, and the fold line is formed in the hinge portion. A container characterized by being set. The storage body according to any one of claims 1 and 2 , wherein the storage body includes 100 parts of the water 50 to 90 parts of the paper fiber and 50 to 90 parts of the starch binder. A container formed of a kneaded material obtained by adding 0.2 to 2.0 parts of a non-alkali metal long-chain fatty acid salt to 100 parts of a mixture obtained by adding 200 parts. The storage body according to any one of claims 1 to 3 , wherein the starch-based binder is obtained by replacing 10-50% (weight) of the starch binder with polyvinyl alcohol. . The storage body according to any one of claims 1 to 4 , wherein the storage body and the sheet material are heated and integrated while being partly mixed with each other while being pressurized. A storage body characterized by.

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