WO2000040801A1

WO2000040801A1 - Formed body

Info

Publication number: WO2000040801A1
Application number: PCT/JP1999/002367
Authority: WO
Inventors: Kenichi Otani; Yoshiaki Kumamoto; Koichi Sagara; Shinji Kodama; Minoru Goto; Susumu Fujinami; Tokuo Tsuura; Shinji Otakura; Takehiko Tojo; Yukiya Sato; Masataka Ishikawa; Shingo Odajima; Masanori Takita
Original assignee: Kao Corporation
Priority date: 1998-12-28
Filing date: 1999-05-06
Publication date: 2000-07-13
Also published as: EP1156157A1; EP1156157A4

Abstract

A formed body (10) formed mainly of pulp, comprising a bottom part (13) and a shell part (12), wherein an angle υ formed between the ground-contact surface (B) of the bottom part (13) and the side wall outer surface of the shell part (12) is 85° or larger, and the height of the shell part (12) is 50 mm or higher.

Description

Specification

Molded body

Technical field

TECHNICAL FIELD The present invention relates to a molded product using pulp as a main raw material.

Background art

Plastics are generally used as raw materials for hollow containers such as containers having a lid and bottles because they have excellent moldability and are also advantageous in terms of productivity. However, since plastic hollow containers have various problems in terms of disposal, pulp hollow containers can be considered as an alternative. Hollow containers made of pulp are economically superior because they are easy to dispose of and can be manufactured from waste paper.

As a conventional technique related to a hollow container made of pulp, for example, a technique described in Japanese Patent Application Laid-Open No. Hei 5-27998 is known. The container described in this publication has a side wall rising angle of 45 ° or more and a depth of 15 mm or more. However, since this container is manufactured by pressing a pulp component collected on a papermaking net with a pressing mold and further heating and pressing with a metal mold, the rising angle of the side wall is substantially vertical or not. It is practically impossible to go any further and deeper.

Further, as another technique relating to a pulp mold container, for example, a technique in which a ring convex rib is provided on an outer peripheral surface of a bottle body is known. However, such a bottle forms a pulp layer individually on each surface of a pair of split dies, and then pierces the split dies and attaches the two pulp layers together. Since it is formed by bonding, a seam is formed at the bonded portion, the bottle strength is reduced, and the appearance of the bottle is not good.

Therefore, an object of the present invention is to provide a molded product mainly made of pulp having a large side wall rising angle and a deep bottom.

Another object of the present invention is to provide a molded article mainly made of pulp having a predetermined shape of a concave or convex portion in an opening or a body without a decrease in bottle strength and a good appearance impression. And Disclosure of the invention

The present invention has a bottom and a trunk, the angle 角 between the grounding surface of the bottom and the outer surface of the side wall of the trunk is more than 85 °, and the height of the trunk is at least 5 O mm The above object has been achieved by providing a molded article formed mainly of a knurl (hereinafter, the i-th invention is referred to as the present invention).

Further, the present invention has a bottom portion, a body portion, and an opening portion, wherein the body portion is formed with a concave portion or a convex portion, or extends inward at a peripheral portion of the opening portion. When the protrusion is formed, and the concave part and the convex part are linearly continuous, they are continuous only in the horizontal direction or the oblique direction of the molded body. The above object has been achieved by providing a non-existent molded article formed mainly of pulp (hereinafter, the second invention refers to this invention). BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view showing one embodiment of the molded article of the present invention.

FIG. 2 is a longitudinal sectional view of the molded body shown in FIG.

FIG. 3 is a cross-sectional view of the body of the molded body shown in FIG.

4 (a), 4 (b), 4 (c) and 4 (d) show the results shown in FIG. FIG. 3 is a process chart sequentially showing a paper making process in a process of manufacturing the molded article of the embodiment.

FIG. 5 is a longitudinal sectional view (corresponding to FIG. 2) showing an embodiment of the molded article of the second invention.

FIG. 6 is a longitudinal sectional view (corresponding to FIG. 2) showing another embodiment of the molded article of the second invention.

FIG. 7 is a perspective view showing a first embodiment of the molded article of the first invention. FIG. 8 is a side view of the compact shown in FIG.

FIGS. 9 (a) and 9 (b) are cross-sectional views showing two preferred forms of the first hinge part and the second hinge part, respectively.

FIG. 10 is a schematic diagram showing a state in which the pulse slurry is injected into a mold preferably used for manufacturing the molded body shown in FIG.

FIG. 11 is a perspective view showing a third embodiment of the molded article of the first invention. FIG. I2 is a side view of the compact shown in FIG. L1.

FIG. 13 is a schematic diagram for explaining a method of forming a hinge portion in one embodiment of a method of manufacturing the molded body shown in FIG. I1.

FIG. 14 is a perspective view showing a fourth embodiment of the molded article of the first invention. FIG. 15 is a perspective view showing a fifth embodiment of the molded article of the first invention. FIG. 16 is a cross-sectional view taken along the line AA of FIG. 5 showing a fixing state of the measuring container by the locking and fixing protrusions.

FIG. 17 is a perspective view showing a sixth embodiment of the molded article of the first invention. FIG. 18 is an enlarged view of a main part of the hanging hand attaching portion.

FIG. 19 is a perspective view showing a seventh embodiment of the molded article of the first invention. FIG. 20 is an exploded perspective view of a mold preferably used for manufacturing the molded article of the seventh embodiment.

Fig. 21 is a longitudinal section of the mold shown in Fig. 20 cut along the mating surface and viewed. FIG.

FIGS. 22 (a) and 22 (b) are process diagrams showing a part of the paper making process in the process of manufacturing the molded article of the embodiment shown in FIG. 19.

FIG. 23 is a vertical cross-sectional view of an eighth embodiment of the molded product of the fifth invention.

FIG. 24 (a), FIG. 24 (b), FIG. 24 (c) and FIG. 24 (d) are views sequentially showing steps of laminating a plastic film on the inner surface of the molded body. FIG. 25 is a partially cutaway perspective view showing a main part in a state where a shrink film is coated on an outer surface of a molded body.

FIG. 26 (a) and FIG. 26 (b) are views showing a step of covering the outer surface of the molded body with a shrink film. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the molded article of the first invention will be described based on preferred embodiments with reference to the drawings.

1 and 2 show a perspective view and a longitudinal sectional view of a molded body 10 of the first embodiment of the first invention. The molded body 10 is a hollow container particularly suitable for accommodating contents such as a powdery body and a granular body, and has an opening 11 at an upper part thereof, and further has a body part 12 and a bottom part 13. are doing.

The body portion 12 and the bottom portion 13 are connected to each other via a curved surface portion 1 1 ′, thereby increasing the impact strength of the molded body i 0. The curvature of the curved surface portion 1 2 ′ should be 0.5 mm or more, especially 5 mm or more, especially 7 mm or more, as described later in the points of improvement of impact strength, improvement of drying efficiency and improvement of surface finish of molded body. The eighth embodiment is preferable in that the adhesion to a plastic film is improved. The cross section of the molded body 10 has a rectangular shape with four rounded corners. This also increases the impact strength of the molded body 10. The curvatures at the four corners are due to the same reason It is preferably at least 0.5 mm, especially at least 5 mm, especially at least 7 mm. In addition, each of the four sides of the rectangle has a gently curved shape that slightly expands outward. The body portion 12 is formed with a concave portion 14 that is continuous over the entire periphery thereof, thereby improving the gripping property of the molded body 10. The concave portion 14 will be described later in detail.

The outer surfaces of the front and rear walls constituting the body 12 are shaped so as to form a straight line in the height direction of the molded body 10 when the molded body 10 is viewed from the side direction (however, Except the concave part 14). Similarly, the outer surfaces on the left and right sides of the body 12 also have a shape that forms a straight line over the height of the molded body 10 when the molded body 10 is viewed from the front. Yes (similarly, except for concave part 14) o

The bottom part 13 is composed of a central concave part 15 and a continuous heel part 16 surrounding the central concave part 15. The outer surface of the heel portion 16 is a ground contact portion of the molded body 10. Since the bottom portion 13 has such a configuration, the mounting stability (so-called sitting) of the molded body 10 is improved.

The outer surface and the inner surface of the molded body 10 are smooth. Thereby, for example, when a plastic layer or a coating layer is formed on the outer surface, the Z surface or the inner surface as described later, the adhesiveness is improved, and printing on the outer surface can be performed easily and neatly. Furthermore, the impression of the external appearance is further improved. In the present specification, “smooth” means the center line average roughness (Ra, JISB660U is 50 mu im or less, and the maximum height ( Rmax, JISB 0601) is 500 m or less.

In the molded body 10, as shown in FIG. 2, the angle between the grounding surface B of the bottom part 13 and the outer surface of the side wall of the body part i2, more than 85 ° in any of the front and rear walls and the left and right walls, Preferably, it is at least 89 ° (in FIG. 2, the angle Θ is approximately 90 °). . ) Also, the height h (see FIG. 2) of the body 11 is 50 mm or more, preferably 10 O mm or more. Angle Θ may be greater than 90 °. In the container described in the above-mentioned Japanese Patent Application Laid-Open No. 5-279978, it is practically impossible to increase the rising angle of the side wall and make the bottom deeper. Although there were various restrictions on the design, according to the present invention, there is no such disadvantage. The outer surface of the side wall of the body to be measured for the angle は refers to the outer surface of the molded body 10 in the height direction of the molded body 10 when viewed from the front or side. Means a straight line. Therefore, when measuring the angle 上記, the outer surface of the concave portion 14 formed in the body 12 is not a measurement target.

In particular, unlike the conventional pulp mold hollow molded body, the molded body 10 of the present embodiment has a body portion 12 and a seam and a thick portion formed by bonding from the body portion 12 to the bottom portion 13. I haven't. As a result, the strength of the molded body is increased and the container has a good appearance impression.

The molded body 10 is formed using pulp as a main raw material. Of course, it may be formed from 100% of pulp. The case of using other materials in addition to the pulp, 1 the amount of other materials 7 0 wt ^0/6, in particular 5-5 0% by weight and to Rukoto preferred. Examples of other materials include inorganic substances such as talc and power fibers, inorganic fibers such as glass fibers and power fibers, powders or fibers of synthetic resins such as polio fins, non-wood or vegetable fibers, and polysaccharides. Can be

In the molded body 10 formed from the above-described raw materials, the density (that is, the density of the meat portion of the molded body 1 °) is set to 0.4 to 2.0 g / cm ³ , whereby the molded body 10 is formed. It satisfies the mechanical properties such as tensile strength, compressive strength, drop strength, and frontage strength, and can be formed into a molded article having appropriate rigidity as a hollow container. By setting the density of the molded product 10 to more preferably 0.6 to 0.5 g / cm ³ , the usability can be improved. In addition, by setting the moisture permeability of the molded article 10 to 100 g / (m ² * 24 hr) or less, preferably 50 g / (m ² Moisture, making it difficult to absorb the water and maintaining the appropriate rigidity of the hollow container, effectively preventing the quality of the contents from being impaired by the absorption of water, that is, the storage stability of the contents Can be improved.

The molded body 10 preferably has a surface tension of 10 dyn / cm or less, and preferably has a water repellency (JISP 8137) of R10. A molded article having such surface tension and water repellency can be obtained by molding as a papermaking raw material in which additives such as a water-resistant agent and a water-repellent agent are mixed in a pulp slurry.

It is preferable that the molded body 10 has a tensile strength of 5 MPa or more, particularly 10 MPa or more, because breakage due to impact or the like can be suppressed. The tensile strength here is measured in accordance with JISP 8113 by cutting out a measuring piece of length 14 Ommx width i 5 mm from an arbitrary part of the molded body 10, and a distance t 0 Omm between chucks in a tensile tester. Means the breaking strength when pulled at a tensile speed of 20 mm / min. However, in the case where a measurement piece of the above size cannot be obtained, or in the case of a molded article, measurement is performed by appropriately changing the size of the measurement piece. In addition, if the specific compression strength of the molded body 10 is 100 Nm ² / g or more, particularly 110 Nm ² / g or more, the molded body 10 is hardly crushed even if the molded bodies 10 are stacked. preferable. The specific compressive strength mentioned here is measured by a method according to JISP 8126.

Further, it is preferable that the molded body i0 has such a strength that it does not crack even if it is dropped 10 times, when its drop strength is measured by a method according to JISZ0217. In addition, as a measurement of the frontage strength of the molded body 10, when the opening 11 of the molded body 10 is pressed from the side surface and deformed by 3 mm, the pressing is performed. Preferably, the force is at least 10 N.

Further, in the molded body 10, when the thickness of a part of the corner in the longitudinal section and / or the transverse section is larger than the thickness of the other part, the molded body is compared with the case where both thicknesses are the same. It is preferable because the compressive strength (buckling strength) of the entirety improves. For example, in the vertical sectional view of the molded body i0 shown in FIG. 2, the thickness T2 of a part of the corner, that is, the curved surface portion 12 'and the thickness T1 of the body portion 11 (that is, T2 > T1) is preferred. In this case, if T 2 / T 1 is 5 to 2, the compressive strength of the entire molded body i 0 is further improved. Further, it is preferable that the thickness of T1 itself is 0.1 mm or more from the viewpoint of exhibiting the minimum compressive strength required for the molded body 10. It is necessary for the molded body 10 to have a predetermined compressive strength from the viewpoint of transportation of the molded body 10 and stacking of the molded body 10 in a warehouse or a store. Similarly, in the cross-sectional view of the body of the molded body 10 shown in FIG. 3, it is preferable that the thickness T 2 of the corner part is larger than the thickness T 1 of the other part.

In addition to the above relationship between TI and T2, the density <0 2 of the corners in the vertical and / or cross-section of the molded body 10 is smaller than the density 1 of the other parts. When it is small (that is, when 1> A2), the effect of simultaneously satisfying the trade-off phenomena of improving the compressive strength of the molded body 10 and reducing the amount of material to be used can be obtained. In this case, 0.1 L XL o S; this effect is even more pronounced. In the compact i 0 satisfying these relationships, the compressive strength is 19 ON or more. The compressive strength is the maximum strength when the compact 10 is compressed at a speed of 20 mm / min from the height direction. T 1 and T 2, and X) In order to establish the above-mentioned relationship between L and p 2, for example, in a preferable manufacturing method of a molded body t 0 described below, pressurization at the time of pressing by the core 6 The pressure and flow rate of the fluid, the material and shape of the core 6, the shape of the molded body, and the like may be made appropriate.

—As an example, the compressive strength of the molded body 10 manufactured so that T1 and T2 for the cross section of the body (see Fig. 3), and 1 and 2 have the values shown in Table 1 below, are shown in the same table. It can be seen that as the value of Τ 2 / Τ 1 is larger and the value of Ρ 2 / ρ 1 is smaller, the compressive strength is improved. In addition, Example 2 with higher compressive strength is lighter in weight. Τ 1, Τ 2, 丄 and? The value of is the average of the values measured at the four places in the height direction of the torso. table 1

Next, a preferred method for producing the molded article of the present embodiment will be described with reference to FIG. The molded body 10 of the above embodiment is manufactured by a pulp molding method, and is particularly preferably manufactured by depositing pulp on the inner surface of a cavity having a cavity therein. FIGS. 4 (a) to 4 (d) sequentially show the paper making process of the process for producing the molded article 10 by such a method. Specifically, FIG. 4 (a) shows the paper making process, and FIG. (C) is the pressurization and dewatering process, and (cl) is the process of opening the mold and removing the pulp laminate.

First, as shown in FIG. 4 (a), a pair of split molds 3 and 4 are abutted to form a pulp in a mold in which a cavity 1 having a shape corresponding to the outer shape of the molded body 10 to be molded is formed. Inject the slurry. Each split mold 3 and 4 has A plurality of communication holes 2 communicating from the outer surface to the cavity 1 are provided. The inner surfaces of the split dies 3 and 4 are covered with nets (not shown) each having a mesh of a predetermined size.

Next, the inside of the cavity 1 is depressurized by sucking from the outside of the split dies 3 and 4, the moisture in the pulp slurry is sucked, and the pulp fibers are deposited on the inner surface of the cavity 1. As a result, a pulp laminate 5 in which pulp fibers are deposited is formed on the inner surface of the cavity 1.

When the pulp laminate 5 having a predetermined thickness is formed, the injection of the pulp slurry is stopped, and the inside of the cavity 1 is completely sucked and dehydrated. Subsequently, as shown in FIG. 4 (b), the inside of the cavity 1 is suctioned and decompressed, and at the same time, the elastic, stretchable and hollow core 6 is inserted into the cavity 1. The core 6 is used to give the inner shape of the cavity i by inflating it like a balloon in the cavity i and pressing the pulp laminate 5 against the inner surface of the cavity 1. Therefore, the core 6 is made of urethane, fluorine-based rubber, silicone-based rubber, or elastomer having excellent tensile strength, rebound resilience and elasticity. The core 6 may be a hollow bag.

Next, as shown in FIG. 4 (c), a pressurized fluid is supplied into the core 6 to expand the core 6, and the expanded core 6 presses the pulp laminate 5 against the inner surface of the cavity 1. . Then, the pulp laminate 5 is pressed against the inner surface of the cavity i by the expanded core 6, and the inner surface shape of the cavity 1 is transferred to the pulp laminate 5 and dehydration further proceeds. As described above, since the pulp laminate 5 is pressed from the inside of the cavity 1 to the inner surface of the cavity i, even if the shape of the inner surface of the cavity i is complicated, the shape of the inner surface of the cavity 1 can be accurately formed. It will be transferred to the pulp laminate 5. Furthermore, unlike the conventional manufacturing method, there is no need to use a bonding process. In the obtained molded body, there are no joints and thick portions due to bonding. As a result, the strength of the obtained molded body is increased, and the appearance impression is improved. As the pressurized fluid used to expand the core 6, for example, compressed air (heated air), oil (heated oil), and other various liquids are used. Further, the pressure for supplying the pressurized fluid is preferably set to 0.01 to 5 &, particularly preferably to 0.1 to 3 MPa.

When the shape of the inner surface of the cavity 1 has been sufficiently transferred to the pulp laminate 5 and the pulp laminate 5 has been dewatered to a predetermined moisture content, the pressurized fluid in the core 6 as shown in Fig. 4 (d). Pull out. Then, the core 6 automatically shrinks and returns to its original size. Next, the contracted core 6 is taken out of the cavity 1, the mold is further opened, and the wet pulp laminate 5 having a predetermined moisture content is taken out.

The pulp laminate 5 taken out is then subjected to a heating / drying step. In the heating-drying process, the same operation as in the papermaking process shown in Fig. 4 is performed except that papermaking and dewatering are not performed. That is, first, a mold in which a cavity having a shape corresponding to the outer shape of the molded body 10 to be molded is heated to a predetermined temperature by abutting a pair of split molds, and the mold is wetted in the mold. The pulp laminate in the state is loaded.

Next, a core similar to the core 6 used in the papermaking step was inserted into the pulp laminate, and a pressurized fluid was supplied into the core to expand the core. The pulp laminate is pressed against the inner surface of the cavity by a core. The material of the core and the supply pressure of the pressurized fluid can be the same as those in the papermaking process. In this state, the pulp laminate is heated and dried. When the pulp laminate is sufficiently dried, the pressurized fluid in the core is drained, and the core is shrunk and taken out. Further, the mold is opened, and the molded article 10 is taken out. In the molded body 10 manufactured in this manner, the angle す between the ground surface of the bottom portion 13 and the outer surface of the side wall of the body portion 12 is more than 85 °, and the height of the body portion 12 is 5 0 mm or more. Moreover, the outer surface and the inner surface of the molded body 10 are both smooth, and there is no seam due to bonding.

Next, the second invention will be described with reference to FIGS. In addition, to the points which are not particularly described with respect to the second invention, the description which has been described in detail with respect to the first invention described above is appropriately applied.

The molded article 10 of the first invention shown in FIG. 5 has substantially the same configuration as the molded article of the first invention shown in FIGS. I to 3, and the body 12 has an entire circumference similar to the first invention. , A continuous concave portion 14 is formed. In the molded body 10 shown in FIG. 6, a convex portion 14 ′ is formed over the entire circumference of the body portion 12 instead of the concave portion. Further, in each of the molded bodies 10 shown in FIGS. 5 and 6, an inwardly extending extension 17 is formed continuously along the entire periphery at the peripheral edge of the opening i1. Have been. The extension 17 has a function of increasing the strength of the opening 11. Further, the upper surface is used as a glue margin for the paper seal when the opening 11 is closed with paper seal or the like. The concave portion 14, the convex portion i 4 ′, and the extending portion 17 in the molded article 10 correspond to a portion called an undercut portion in the field of plastic injection molding, and the concave portion referred to in the present invention. The protruding portion and the extending portion include all portions corresponding to such a portion called an undercut portion. Therefore, the concave and convex portions formed linearly and continuously in the vertical direction of the molded body 10 do not correspond to the undergutter portion, and therefore, the concave and convex portions in the present invention. Excluded from In other words, when the concave portions and the convex portions are linearly continuous, they are continuous only in the horizontal direction or the oblique direction of the molded body 10. When the conventional pulp molding method is used, the container having the concave portion 〖4, the convex portion 14 ′, and the extension portion 17 can be joined without causing a seam by bonding. It could not be manufactured. On the other hand, the molded article of the present invention has a concave portion,

Despite having a convex part 14 'and an extended part 17, there is no seam due to shellfish divination, preventing a decrease in strength and improving the impression of appearance. .

In the embodiment of the second invention, the concave portion 14 and / or the convex portion 14 ′ may be formed so that, for example, a three-dimensional character, figure or symbol is formed on the body portion 12. . Further, the extending portion 17 of the molded body 10 may be formed intermittently at the periphery of the opening 1 i.

Next, the second to eighth embodiments of the first invention will be described with reference to FIGS. 7 to 26.

Three

explain. In the second to eighth embodiments, only the points different from the first embodiment will be described, and for the points not particularly described, the detailed description of the first embodiment will be applied as appropriate. 7 to 26, the same members as those in FIGS. L to 4 are denoted by the same reference numerals. Unless otherwise specified, the first to eighth embodiments of the first invention are similarly applied to the embodiments of the second invention.

As shown in FIGS. 7 and 8, the molded body 10 of the second embodiment has a lid that opens and closes an upper end opening 1 該 of the molded body. Alternatively, the weighing container is continuously formed by integral molding via the thin and high-density first hinge portion and / or second hinge portion.

The lid 18 is integrally formed with the molded body i 0, and is provided near the opening 11 via a first hinge portion 31 so as to be able to open and close the opening 11 of the molded body 10. And are integrally connected. The lid 18 is composed of a flat upper surface 32 and a peripheral wall 33 rising from the peripheral edge of the upper surface 32. The molded body 10 is fitted at the lower end 33a of the peripheral wall 33. It is designed to be detachably fitted to the joint. The lid 18 and the molded body 10 are connected between the lower end 33 a of the peripheral wall 33 of the lid 18 and the horizontal contact portion 25 of the molded body 10. The measuring container 19 is also integrally formed with the molded body 10 like the lid 18, and is integrally connected to the molded body 10 via the second hinge portion 41. The weighing container 19 is a spoon-shaped container including a bottomed square cylindrical storage portion 42 and a handle 43 integrally provided with the storage portion 42. It is connected to the vicinity of the opening 11 of the molded body 10 via a connecting portion 44 having 1. As shown in FIG. 8, the weighing container 19 is rotated about the second hinge portion 41 as a rotation axis so that the weighing container 19 can be stored in the molded body 10 without protruding above the opening 11. Is provided. With such a configuration, the opening i 1 can be closed without any trouble by a paper seal or the like.

The lid 18 and the measuring container 19 are each integrally formed with the molded body 10, and are connected to the molded body 10 via the first hinge part 31 and the second hinge part 41, respectively. ing. The first hinge portion 31 is formed as a thin and high-density portion at a connection portion between the lid 18 and the molded body 10. The second hinge portion 41 is formed as a measuring container 19 and the molded body 10. Is formed as a thin and high-density portion at the connection portion with the above.

More specifically, a long groove having a predetermined cross-sectional shape is provided in each of a connecting portion connecting the lid 18 and the molded body 10 and a connecting portion connecting the measuring container i 9 and the molded body 10. Are provided in a straight line, and the portions provided with the long grooves are the first hinge portion 31 and the second hinge portion 41. The lid i 8 is rotated about the first hinge portion 31 as a rotation axis so as to draw an arc-shaped trajectory so that the opening L 1 of the molded body 10 can be opened and closed. The weighing container 19 is similarly rotated about the second hinge portion 41 as a rotation axis, and can be stored in the molded body 10.

The first hinge part 31 and the second hinge part 41 are formed thinner than the other parts, respectively, of the molded body 10, the lid 18 and the weighing container 19, and the hinge parts 31 and 41 respectively. The thickness T 1 (see Fig. 9) at the thinnest part of From the viewpoint of obtaining excellent bending properties and durability, the thickness is 0.05 mm or more, and 5% to 10% with respect to the thickness of the molded body 10, the lid 18 and the other parts of the measuring container 19. It is preferably 0%, especially 15% to 80%. The molded body 10, the lid body 18 and the measuring container part i9 have the same thickness and the same density for all parts except the first and second hinge parts; Department

The range of the preferred thickness T 1 of 31 and 41 and the range of the preferred density of both hinge portions 31 and 41 described later are values measured based on the thickness and density of the body 12 of the molded body 10. Is shown.

The first and second hinge portions 31 and 41 are formed at a higher density than the other parts of the molded body i 0, the lid 18 and the measuring container 19. The densities of the first and second hinge portions 31 and 41 are determined from the viewpoint of obtaining excellent bending property and durability, respectively, from the molded body 〖0, the lid body 18 and the other parts of the measuring container 19. The density is 1.05 to 20 times, preferably 2 to 20 times, particularly preferably 2 to 5 times. From the same viewpoint, the preferred density of the hinge portions 31 and 41 is 0.4 to 2. Og / cm ³ . The density of the hinge part is the maximum density of the hinge part, and is a value calculated by measuring the thickness and weight per fixed area.

In addition, from the viewpoint of obtaining excellent bendability and durability, each of the first and second hinge portions 31 and 41 has a tensile strength of 5 MPa or more and a specific compressive strength of 100 Nm ^2. / g or more. In addition, from the same viewpoint, the width of both hinges 3 and 41 (the width in the direction connecting the molded body 10 and the lid 18 or the measuring container 19) is 0.1 mm or more, particularly i mm or more. It is preferable that there is. Here, the width of the hinge portion refers to the minimum width of the groove located outside at the time of bending.

FIG. 9 shows two preferred forms of the hinge portions 31 and 41. The hinge part in Fig. 9 (a) is located above the connecting part between the molded body 10 and the lid 18 or the measuring container 19. A groove is provided on each of the lower surfaces, and the hinge portion in FIG. 9B is formed by providing a groove only on the lower surface of the connecting portion. The upper side in FIG. 9 is the inside (valley side) at the time of bending. In the hinge part of Fig. 9 (a), the width of the deepest part of the lower groove in the figure is W1, and in the hinge part of Fig. 9 (b), the width of the deepest part of the groove W3 Force ^ The width of the hinge part It is. Further, it is preferable that the corners in the groove indicated by “C or R” in FIG. 9 have chamfered corners or an R shape. Further, preferable dimensions of each part in the hinge part shown in FIG. 9 are as follows. The width W2 of the surface portion of the inside groove at the time of bending at the hinge portion in FIG. 9A is preferably 1 mm or more. Further, the width W3 of the innermost portion of the hinge portion in FIG. 9B is preferably not less than 0.2 mm, and is preferably not more than the width W4 of the surface portion of the groove. The width W 4 is preferably 1 mm or more.o

In the present embodiment, it is preferable that not only the molded body 0 but also the lid 18 and the measuring container 19 are formed using pulp as a main raw material.

In the molded body 10 of the present embodiment, as described above, the lid i8 is connected to the molded body 10 via the thin and high-density first hinge portion 31. Even if the opening and closing are repeated, there is no inconvenience such as the hinge portion 31 being cut. For this reason, the molded article 10 is preferably used as a container in which the contents need to be repeatedly taken out little by little.

Similarly, the measuring container 19 is connected to the molded body i0 via the thin and high-density second hinge portion 41, so that the measuring container 19 is connected to the molded body 10 during transportation. The part is not cut. Further, since the measuring container 19 is provided so as to be accommodated in the molded body 10 by bending, there is no problem of the measuring container 19 dropping off during transportation. When the measuring container 19 is used, the connecting portion 44 may be cut with scissors, a force cutter or the like, and the measuring container 19 may be separated from the molded body 1 () ■.

I 6 In the molded body 10 of the present embodiment, since the molded body 10 and the lid 18 (the measuring container 19) are integrally molded, the production process can be simplified and the production cost can be reduced. Can be. Since not only the molded body 10 but also the lid body 18 (measuring container 19) is formed mainly of pulp, disposal is easy, and furthermore, waste paper can be manufactured as a raw material. It is also economically good.

The molded body 10 of the present embodiment can be manufactured by using the mold shown in FIG. 10 and by a method substantially similar to the method shown in FIG. Specifically, the lid 18 and the measuring container 19 are integrally formed with the molded body 10 by a papermaking method, and the first hinge portion 3 L and the second hinge portion 41 are formed from the valve laminate after papermaking and dewatering. A part of the connection between the molded body 10 and the lid 18 or the measuring container 19 in the mold intermediate is formed by pressurizing and compressing. Here, the mold intermediate refers to a laminate of pulp fibers having a given shape through a papermaking-dewatering step, and also includes a molded article after a pressing and drying step.

The manufacturing method of the molded body of this embodiment is different from the manufacturing method of the molded body shown in FIG. 4 in that the mold intermediate after the heating / drying step is taken out of the mold and placed on another member. Or forming the first hinge portion 31 and the second hinge portion 41 in the mold intermediate in a state where the mold intermediate after the heating / drying step is left attached to the inner surface of one split mold. The first hinge part 31 and the second hinge part 4i are formed by compressing the part under pressure. The compression is performed by forming the first hinge part 31 and the second hinge part 41 in the mold intermediate body into a cross-sectional shape corresponding to the shape of the first hinge part 31 and the second hinge part 41, respectively. It is preferable to perform the pressing by a long projection. Papermaking. After the dewatering step and heating. If part of the mold intermediate before the drying step is compressed under pressure, the first hinge part 31 and the no or second hinge part are thinner and denser than the other parts. 4 1 can be formed easily and efficiently You.

According to the above manufacturing method, the molded body 10 of the above embodiment can be efficiently and economically manufactured.

In addition, the molded article 10 is formed by using a metal mold having a net having a mesh stretched on the surface of a metal mold substrate or a porous metal mold or the like, and forming an inner surface of the metal mold. Pulp is deposited to form a pulp layer, and a mold intermediate obtained by dewatering the pulp by a known method is transferred to a pair of female molds or male molds, and the male mold corresponding to the female mold or male mold is transferred. It can be manufactured by pressing and drying with a mold or a female mold. In this case, the formation portion of the first hinge portion 31 and the second hinge portion 41 in the mold intermediate after pressing and drying is pressurized and compressed to form the first hinge portion: 31 and / or the second hinge portion. The hinge portion 41 may be formed, or a projection for forming a hinge portion may be provided in a part of the mold for pressing and drying, and the first pressing may be performed simultaneously with the pressing and drying by the pressing force of the projection. The hinge part 31 and / or the second hinge part 41 may be formed. When forming both hinge portions 31 and 41 at the time of pressing and drying, a movable pressing portion is provided in a part of the mold, and the pressing portion is pressed by the pressing portion at an appropriate time in the pressing and drying. Alternatively, both hinge portions 31 and 41 may be formed. Even with such a manufacturing method, the molded body 10 of the above embodiment can be efficiently manufactured.

In the molded body 10 of the above embodiment, both the lid 18 and the measuring container 19 are provided with the thin and high-density hinge portions 31, 41 near the opening 11 of the molded body 10. Instead, only one of the lid 18 and the measuring container 19 is connected to the molded body 10 via a thin and high-density hinge portion. The measuring container No. 9 need not be provided. The measuring container 19 is not particularly limited as long as the object of measuring can be achieved, and various shapes and capacities can be provided.

As shown in FIGS. 11 and 1, the molded body of the third embodiment has A lid for opening and closing the upper end opening of the molded body, the lid being manufactured separately from the molded body, and via a connecting portion having a hinge provided on the lid; To the molded body.

In detail, the lid 18 is manufactured as a separate body from the molded body 10, and is fixed to the container body 2 via a connecting portion 3 having a hinge portion 3 1 provided on the lid 18. ing. The structure of the lid 18 is the same as that in the second embodiment.

The connecting portion 31 ′ is integrally connected to the lower end 33a of the peripheral wall portion 33, and is formed integrally when the lid 18 is formed. The connecting portion 31 ′ has a substantially rectangular shape, and has a hinge portion 3i at the center. The lid 18 in the present embodiment is formed mainly of pulp, and the hinge portion 31 is formed as a thin and high-density portion in the connecting portion 31 '. More specifically, a long groove having an arc-shaped inner surface is linearly provided at the center of the connecting portion 31 ', and the portion provided with the long groove serves as a hinge portion 3] _ . The portion of the connecting portion 31 'that is closer to the tip end than the hinge portion 31 is an adhesive portion 31a that is bonded to the body 12 of the molded body 10. As shown in FIG. 11, the connecting portion 3 1 ′ is bonded to the body 12 in the present embodiment by bringing the bonding portion 31 a into contact with the body 12 and covering the bonding portion 31 a. This is achieved by bonding a sealing member 31b for bonding. Then, the lid 18 is rotated about the hinge portion 31 as a rotation axis so as to draw an arc-shaped trajectory, and is fixed so that the opening 11 of the molded body 10 can be closed freely. Have been.

The preferred form of the hinge portion 3 is the same as the form shown in FIG. 9 in the second embodiment. Other details of the hinge part 31 are the same as those of the first hinge part in the second embodiment.

As described above, the molded body 10 of the present embodiment has the lid 18 and the molded body 10. Is manufactured as a separate body, and the cover 18 is fixed to the molded body i0, so that it can be manufactured without using a large-sized mold, and can be manufactured economically with good productivity.

In the molded article of the present embodiment, the connecting portion 31 'is integrally formed with the lid 18 by a papermaking method, and the hinge portion 3i is connected to the connecting portion in the papermaking and dewatered mold intermediate. A part of the formation part of 3 1 ′ is formed by pressing and compressing. Here, the mold intermediate has the same meaning as in the second embodiment. In addition, the formation part of the connection part 31 ′ refers to a part that finally becomes the connection part 31 ′.

The molded body 10 can be manufactured by the same method as in FIG. 4 in the first embodiment. Also, the lid 18 can be manufactured through substantially the same steps as those for manufacturing the container body 2.

That is, the steps from the papermaking / dewatering step to the heating / drying step are performed in the same manner as the steps in the production of the molded body 10. However, a mold composed of a pair of split dies forming a cavity having a shape corresponding to the outer shape of the lid 18 to be molded is used.

Remove the mold intermediate after the heating and drying process from the mold and place it on another member, or leave the mold intermediate after the heating and drying process attached to the inner surface of one split mold In this step, a part of the forming portion of the connecting portion 31 'in the mold intermediate is pressurized and compressed. Thereby, the hinge part 31 is formed. As shown in FIG. 13, the pressurization and compression are performed by forming a part of the formation part 46 of the connection part 3 in the mold intermediate body 45 with a projection 47 having a cross-sectional shape corresponding to the shape of the hinge part 31. It is preferable to perform pressing. The lid 18 thus manufactured is formed via the connecting portion 3 so that it can be removably fitted to the fitting portion of the molded body 10 using the hinge portion 31 as a rotation axis. Body 固定 Fixed to 0. Regarding the formation of the hinge part, in addition to the above, For the points not particularly described, the detailed description regarding the formation of the hinge portion in the second embodiment is appropriately applied.

In the present embodiment, for example, the shape and the number of the connection portions 31 'are not limited as long as the cover 18 and the molded body 10 can be connected. For example, a pair of connecting portions 3 1 ′ may be provided on the molded body 10 so as to be separated from each other. The method of fixing the connecting portion 3 to the molded body 10 is not particularly limited as long as the connecting portion 31 ′ can be fixed to the molded body 10; for example, the bonding portion 31a of the connecting portion 31 ′ is fixed. The molded body 10 may be directly bonded to the outer surface of the molded body i0 with an adhesive. Alternatively, the molded body 10 may be provided with a fitting hole, and a part of the connecting portion 31 'may be fitted into the fitting hole. It may be inserted and fixed. Further, the formed body 10 and the lid body 18 can be connected by a tape made of paper or the like without forming the connecting portion 31 '. The connecting portion 31 'is fixed at any position of the molded body 10 as long as the lid 18 can be fixed so that the opening 11 of the molded body 10 can be closed and opened. May be.

Further, the lid 18 is not limited to one formed mainly of pulp, but may be an injection molded article of synthetic resin or the like.

In the molded article of the fourth embodiment, as shown in FIG. 14, the upper end opening of the molded article is covered with a paper seal, and a weighing container is detachably attached to the paper seal.

According to the molded body of the present embodiment, the measuring container can be easily taken out and used without soiling the hands, and can be used without assembling.

As shown in Fig. L4, a sealing paper 63 is attached to the upper end opening 11 of the molded body 10 so as to cover the upper end opening 11 and to which the measuring container 19 is detachably attached. You.

According to the present embodiment, both the paper seal 63 and the measuring container 19 are pallets. These are made of molds, and can be easily integrally formed by a manufacturing method described in, for example, Japanese Patent Application Laid-Open No. 5-27999. That is, a pulp component is made from a pulp raw material liquid on a papermaking net formed into a shape in which the sealing paper 63 and the measuring container 19 are integrated, and the upper surface thereof is pressed by an elastic material. By pressing and dewatering the moisture in the raw material that has been removed, a papermaking container intermediate is obtained, and the container intermediate is heated and pressed to form a three-dimensional measuring container 19 on a paper seal 63. Can be easily obtained as an integral molded product made of pulp mold with the recesses attached. Two

Two

In addition, after integrally forming the joining edge portion 66 of the paper seal 63 and the measuring container 19, a cutout line is printed along the joining edge portion 66, or a partial cut-out or perforation is performed. A thin portion is formed. By forming these, the weighing container 19 can be easily separated and removed from the paper seal 63 by manual operation. Perforations or the like may be formed during molding.

The sealed paper 63 in which the measuring container 19 is formed is formed by, for example, storing a powdered detergent inside the molded body 10 and then covering the upper end opening 11 of the molded body 10. The peripheral portion is attached to the upper end of the molded body 10 via an adhesive, and the powdered detergent in the molded body 10 is enclosed. Furthermore, a lid 18 made of pulp mold, which is hinged to the upper end of the molded body 10 and is provided so as to be openable and closable, is closed.

To use the molded body i 0 of the present embodiment, the lid 18 is opened, the sealing paper 63 is removed, the molded body 10 is opened, and the measuring container 19 is removed from the sealing paper 63 and Then, a predetermined amount of the powdered detergent inside is measured and taken out using the measuring container 19, and then the powdered detergent is put into a washing machine or the like.

According to the present embodiment, the measuring container 19 is detachably attached to the paper seal 63. The weighing container 19 is not buried in the powdered detergent because it is attached, so it is difficult to remove the weighing container 19 because the location of the weighing container 19 cannot be determined. Is not dirty.

Further, since all of the molded body 10, the sealing paper 63, the measuring container 19, and the lid 18 are formed by the pulp mold, disposal is easy.

In the present embodiment, for example, the paper seal, the measuring container, and the lid need not necessarily be made of pulp mold, and may be made of other materials such as plastic. Further, the means for detachably attaching the weighing container to the paper seal may be a means for detachably attaching the weighing container to the paper seal via an adhesive.

As shown in FIG. 15, the molded body according to the fifth embodiment is provided with a measuring container mounting portion formed by molding.

According to the molded article of the present embodiment, the measuring container can be fixed to a predetermined portion of the molded article, and can be easily taken out and used.

As shown in FIG. 15, on the upper inner side surface of the molded body 10, the housing portion 71 is engaged with a locking fixing projection 70 that is formed integrally with the molded body 10 and protrudes, A three-dimensional measuring container I9 made of plastic or the like is detachably fixed.

The locking projection 70 for fixing the measuring container 19 to the upper inner surface of the molded body 10 is a rib having a semicircular cross section as shown in FIG. A pair of upper and lower portions are provided so as to extend in parallel with the positions along the side edges of the storage portion 71 when the weighing container 19 is arranged so that the both side edges of the storage portion 71 can be sandwiched therebetween. Between the pair of locking and fixing projections 70, the housing portion 71 of the measuring container # 9 is closed from the side while closing the opening portion with the opening thereof on the inner side of the molded body 10. Once you enter, the accommodation section 7 1 Are locked by the upper and lower locking fixing projections 70, respectively, and the measuring container 19 is fixed to the upper inner surface of the molded body 10. In addition, the measuring container 19 can be easily removed and used by sliding and pulling out the measuring container 19 in the direction opposite to the direction in which the slide is inserted. These locking and fixing projections 70 are formed integrally with the molded body 10 when the molded body 10 is manufactured.

According to the molded body 10 of the present embodiment, since the pair of locking and fixing projections 70 is provided on the upper inner surface as a mounting portion of the three-dimensional measuring container 19, the measuring container 19 is fixed thereto. By doing so, the measuring container can be easily taken out without being buried in the granular material by vibration or the like. In addition, since the locking and fixing projections 70 are provided on the upper inner surface of the molded body 10, the measuring container 19 is arranged above the powder and granular material to be stored, so that hands are not stained. It becomes possible to take out a spoon.

In the present embodiment, for example, the measuring container mounting portion can be provided not only on the upper inner surface of the molded body, but also on the outer surface, the lower portion, or the paper seal. In addition, the measuring container mounting portion does not necessarily need to be a rib-shaped locking and fixing projection, and may be formed by various projections and protrusions as long as it can be integrally molded by a pulp mold manufacturing method. Can also be configured. As shown in FIG. 17, the molded body of the sixth embodiment is provided with a hook attaching portion on the body, and a hanging hand is attached to the molded body via the hanging arm attaching portion.

According to this embodiment, it is possible to obtain a molded article with a hanging handle, which is easy to dispose and reuse, and inexpensive to manufacture. In particular, if the pulp is formed mainly by using the molded body and the handle, the disposal and reuse can be further facilitated.

The body 11 of the molded body 10 is composed of front and rear walls 12a, 12a and left and right walls 12b, 12b, and a pair of left and right walls i2b, 12b facing each other. of Hanging hand mounting portions 74 and 74 are provided. The hanging attachment portion 74 is formed mainly of pulp similarly to the molded body 10, and is provided integrally or separately on the left and right walls 12b, 12b. If the hanging hand mounting part 74 is provided separately, the hanging hand mounting part 74 is joined to the left and right walls 12b, 12b by a bonding means such as an adhesive or caulking. I have. As described above, since the molded body 10 is formed mainly of pulp, there is no need to separate and discard, and the disposal is easy.

FIG. 18 is an enlarged view of a main part of the hanging hand mounting part 74. The hanging hand mounting part 74 has a substantially mushroom type 2 shape in a side view, and has a cylindrical base. 7

Five

4A and a substantially hemispherical umbrella 74B connected to one end of the base 74A.

On the other hand, the hook 76 attached to the hook attachment portion 74 has a U-shape. As shown in FIG. 17, a pair of opposed mounting holes 78 are provided at positions near both ends thereof. ing. The mounting hole 78 includes a round hole 78 A and a pair of long holes 78 B provided on a line passing through the center of the round hole 78 A so as to face each other. The diameter of the round hole 78 A is substantially the same as or slightly larger than the diameter of the umbrella portion 74 B of the hanging hand attachment portion 74. In addition, the width of the elongated hole 78B is substantially the same as or slightly larger than the diameter of the base 74A of the hanging attachment portion 74. Then, when attaching the hanging hand 76, first, the umbrella part 74 B of the hanging hand attaching part 74 of the molded body 10 is passed through the round hole 78 A of the mounting hole 78 of the hanging hand 76. . Next, the hanging member 76 is pulled up, and the base 74 A of the hanging member mounting portion 74 is passed through the elongated hole 78 B of the mounting hole 78 of the hanging member 76, thereby completing the mounting. As for the material of the hanging handle 76, it is possible to use a plastic material as before, and it is preferably formed mainly of pulp similarly to the molded article 10 because it is not necessary to separate and discard it. Use something. In the production of the molded article of the present embodiment, the hook attaching portion 74 may be formed integrally with the molded article 10 simultaneously with the production of the molded article 10, or It may be formed separately from 10.

In the present embodiment, for example, instead of forming the hanging hand attaching portion 74 from pulp, the hanging hand attaching portion 74 may be constituted by a metal cellar.

The molded body 10 of the seventh embodiment shown in FIG. 9 is a cylindrical bottle, and the opening 1 i has a body 12 and a body 12 in a region from the upper end surface 86 to a predetermined depth d. A thick portion 87 that is thicker than the thickness of the bottom portion i3 is formed. The thick portion 87 is formed continuously over the entire circumference of the opening 11. The thick portion 87 may be discontinuous depending on the use of the molded body i0.

The thick part 87 may be formed from the upper end face 86 of the opening 11 to the whole area in the depth direction, but as shown in FIG. 19 as long as sufficient mechanical strength is secured. Thus, it may be formed in a region from the upper end surface 87 of the opening 11 to a predetermined depth d. The depth d is generally 0.5 to 50 mm, preferably 5.0 to 30 mm, although it depends on the use and shape of the molded body. As shown in FIG. 19, the thick part 87 protrudes inward of the molded body 10. The extent of this overhang is determined by the amount of overhang X (see FIG. 19) from the inner wall of the portion where the thick portion 87 is not formed in the opening 11 (see FIG. 19), 0.5 to 5.0 mm, Preferably, if it is 1.0 to 3.0 mm, the mechanical strength of the opening 1i can be sufficiently secured. In addition, the area of the upper end surface 86 of the opening 11 is increased, and the margin for sealing the upper end surface 86 with a paper seal or the like can be increased. The adhesive strength of the steel can be increased.

Further, the depth d of the thick portion 87 and the overhang amount X are defined as follows: if the value of d / x is 0.1 to 100, preferably 1 to 30, the mechanical strength of the opening 11 is reduced. sufficient Can be secured. Further, as shown in Fig. 19, in the portion deeper than the depth from the upper end face 86 of the opening 11, the amount X of the overhang is gradually reduced, and the inner wall of the opening 11 is inclined. You may.

The upper end surface 86 of the opening 11 is preferably smooth from the viewpoint of improving the sealing property when sealing with paper sealing or the like. The degree of smoothness of the upper end surface 86 is sufficient if the center line average roughness (R a) is about 50 zm or less and the maximum height (R max) is about 500 m or less. Is secured. In order to smooth the upper end surface 86, for example, a post-process such as polishing the upper end surface 86 by a predetermined means after the production of the molded body 10 is used 2. Preferably, the papermaking metal described below is used.

7

By producing a molded body using a mold, a sufficiently smooth upper end surface 86 can be obtained without performing the above-mentioned post-treatment.

Next, a preferred method for producing the molded article of the present embodiment will be described with reference to FIGS.

In the molded body 10 of the present embodiment, a plurality of communication paths communicating from the outside to the inside are formed, and by abutting each other, a cavity having a shape corresponding to the outer shape of the molded body to be molded is formed inside. And a set of split molds

A papermaking mold having a retaining portion forming mold in which a space capable of retaining slurry is formed between the cavity and the inner surface of the cavity by being introduced into the cavity from the outside. Thus, it is preferably produced.

FIG. 20 is an exploded perspective view of a mold used for manufacturing the molded body of the present embodiment. This mold is different from the split molds 3 and 4 shown in FIG. 4 except that the cavity shape is different. By inserting a pair of split dies 3 and 4 having the same structure into the cavity from outside, a space in which slurry can stay is formed between the cavity inner surface and the cavity. Retaining portion forming mold 9 7 Have. FIG. 20 does not show the inner surface of one split mold 4, but has the same configuration as the inner surface of the other split mold 3.

As shown in FIGS. 20 and 21, the split mold 3 is composed of a papermaking section 91 A and a manifold section 91 B, and the papermaking section 91 A is a manifold section 91 B. The split mold 3 is configured by being inserted into the inside. By this fitting, a manifold 91 C is formed between the paper making section 91 A and the manifold section 91 B. The inner surface of the paper making section 91A may be covered with a net having a mesh of a predetermined size. A plurality of communication holes 94, 94,... Are regularly formed in the inner surface toward the outer surface of the papermaking section 91A. The communication hole 94 communicates with the manifold 91C. Further, a plurality of suction holes 91 D are formed on the left and right side surfaces of the manifold section 91 B, whereby the split mold 3 is provided with a paper making section from the outer surface of the manifold section 9 IB. A communication path leading to the inner surface of 9 1 A will be formed. As shown in FIG. 20, when the two halves 3 and 4 are abutted, a cavity 1 having a shape corresponding to the outer shape of the molded body to be molded is formed in the inside. A portion of the cavity 1 corresponding to the opening 1 mm of the molded body (hereinafter, this portion is referred to as an opening-corresponding cavity) forms an opening that opens to the outside, and this portion will be described later. The retaining wall 97 Β of the slurry 97 for forming the retaining portion 97 is inserted. Although not shown, a screw groove having a shape corresponding to the screw portion is formed on the inner surface of the opening corresponding cavity portion. As shown in FIGS. 20 and 21, the retaining portion forming mold 97 includes a rectangular top plate 97 Α and a cylindrical slurry suspended from a substantially central portion of the lower surface of the top plate 97 A. The wall is composed of 9 7 B. The inside of the slurry retaining wall 97 B is a cylindrical cavity penetrating the retaining portion forming mold 97 in the vertical direction. This cavity becomes the slurry inflow channel 97 C in the mold. Then, the slurry-retaining wall 97 B in the retaining-section forming mold 97 forms the cavity corresponding to the opening. When the lower surface of the top plate 97A and the upper end surfaces of the split dies 3 and 4 come into contact with each other, a mold is formed.

The outer diameter of the slurry retaining wall 97B is smaller than the diameter of the cavity corresponding to the opening. As a result, when the slurry retaining wall 97B is inserted into the cavity corresponding to the opening, the slurry remains between the outer surface of the slurry retaining wall 97B and the inner surface of the cavity corresponding to the opening. A possible annular space 98 is formed.

FIGS. 22 (a) and 22 (b) show a part of the papermaking process of the process of manufacturing the molded body 10 using such a mold. Specifically, FIG. The paper making process, (b) is a process of opening the mold and taking out the pulp laminate. In FIG. 22, the mold is partially omitted for simplicity.

First, as shown in Fig. 22 (a), the injection pump (not shown) is started, the pulp slurry is sucked up from the pulp slurry storage tank (not shown), and the slurry inflow passage 97C The pulp slurry is injected under pressure into the mold. Next, the inside of the cavity 1 is depressurized by sucking from the outside of the split dies 3 and 4 to suck moisture in the pulp slurry and to deposit pulp fibers on the inner surface of the cavity 1. At this time, the slurry wraps around and fills the annular space 98 formed by the outer surface of the slurry retaining wall 97B and the inner surface of the cavity corresponding to the opening. More pulp fibers accumulate than in other parts of. Further, since the pulp slurry is injected into the cavity 1 under pressure, the pressure of the pulp slurry in the cavity 1 is the same at any position, and the pulp slurry sufficiently spreads to the annular space 98. . As a result, a pulp laminate 5 is formed on the inner surface of the cavity 1 in which the thickness of the portion corresponding to the vicinity of the upper end surface of the opening of the obtained molded body is larger than the other portions. This thickness The thickness of the large portion of corresponds to the thickness of the annular space 98 described above. Next, steps similar to the core insertion step and the pressurization / dewatering step shown in FIGS. 4 (b) and (c) are performed. In particular, due to the pressurization and dehydration steps, as shown in FIG. 9, in the obtained molded body 10, the strength of the thick portion 87 near the upper end surface 86 of the opening 11 is sufficiently increased. .

When the shape of the inner surface of the cavity ί is sufficiently transferred to the pulp laminate 5 and the pulp laminate 5 can be dehydrated to a predetermined moisture content, pressurization in the core 6 is performed as shown in FIG. 22 (b). Drain the fluid and remove core 6 from cavity 1. Further open the mold and wet pulp lamination having a predetermined moisture content of 3% o

Remove body 5. Thereafter, the pulp laminate 5 is subjected to a heating / drying step to obtain a molded body L0, similarly to the production step of the molded body of the first embodiment.

The molded body 〖0 manufactured in this manner is thicker than the thickness of the body 〖2 and the bottom L3 in the region from the upper end surface 86 to the predetermined depth in the opening 11 as described above. Thick portions 87 are formed. In addition, the upper end surface 86 is smooth, and sufficient adhesive strength can be obtained even if the upper end surface 86 is sealed with a paper seal or the like without special post-treatment.

The thick portion 86 of the molded body 10 of the present embodiment may protrude inward and outward. The thick portion protruding outward is used, for example, as a projection for fitting with a cap used as needed.

In the molded body 10 of the eighth embodiment shown in FIG. 23, a thin plastic layer is formed on the outer surface 104 and the inner surface 105. By forming such a plastic layer, the strength of the molded body 10 can be further increased, and at the same time, leakage of the contents can be effectively prevented. Since the outer surface 104 and the inner surface 105 of the molded body 10 are smooth, when forming the plastic layer, the outer surface 104 and the inner surface 105 and each plastic are formed. Good adhesion to the layer is achieved. The thickness of each plastic layer is 1 is appropriately selected according to the wall thickness and the type of contents, etc., but is generally 5 to 300 m, particularly 10 to 200, particularly 20 to 100 um, and may be the same. Or it may be different. As a material constituting each plastic layer, various thermoplastic synthetic resins such as polyethylene and polypropylene, emulsion latex such as acrylic emulsion, and hydrocarbon wax are used.

In particular, when laminating a plastic film, a material made of an appropriate material is selected according to the purpose of lamination, for example, the purpose of imparting water resistance and gas barrier property. For example, films made of polyolefins such as polypropylene and polyethylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polystyrene, polycarbonate and the like can be used. Also, a multilayer film in which a plurality of films made of these materials are combined can be used.

For example, when a plastic layer is formed on the inner surface of the molded body 10, in the method of manufacturing a molded body shown in FIG. 4 described above, the core 6 may be replaced by polyethylene or polyethylene. A bag-shaped core made of a plastic film such as polypropylene, a film obtained by vapor-depositing aluminum or silica on the plastic film, a film obtained by laminating aluminum foil on the plastic film, or the like is used. After the pulp laminate 5 is pressed by the core, the core is laminated on the inner surface of the pulp laminate 5 without taking out the core, whereby a plastic layer is formed on the inner surface of the molded body 10.

Alternatively, a plastic layer may be formed on the inner surface of the molded body 10 even if a core made of a bottomed cold norison (preform) preheated to a predetermined temperature is used instead of the elastic core. Can be. That is, after the parison is inserted into the pallet laminate 5, a pressurized fluid is supplied into the parison to By expanding the lisson and forming a plastic film tightly on the inner surface of the knurl laminate, a plastic layer is formed on the inner surface of the molded body 10. As another method of laminating a plastic film on the inner surface of the molded body 10, a vacuum molding method or a pressure molding method can be used. Preferably, the method shown in FIG. 24 is used. In this method, as shown in FIG. 24 (a), a first vacuum chamber 130 and a second vacuum chamber 140 are used. The first vacuum chamber 130 has an opening 131 opened at the top thereof. A through hole i32 is formed in the side wall near the bottom, and the through hole 132 is connected to a vacuum suction means (not shown). The inner shape of the cross section of the opening 13 1 is slightly larger than the outer shape of the cross section of the opening 11 of the molded body i0. On the other hand, the second vacuum chamber 140 has an opening 141 opened at its lower part. The opening portion 141 of the second vacuum chamber 140 has a shape capable of closing the opening portion 131 of the first vacuum chamber 130. The internal shape of the cross section of the opening # 41 is larger than the internal shape of the cross section of the opening 13 1 of the first vacuum chamber 130. A plurality of through-holes 142, 142,... Are formed in the upper top surface of the second vacuum chamber 140, and these through-holes 144 are formed by vacuum suction (not shown). Connected to the means. Further, a heating means 144 such as an electric heater is provided on the inner wall of the upper top surface.

In order to laminate the plastic film on the inner surface of the hollow container 1 using both the vacuum chambers 130 and 140, first, as shown in FIG. 24 (a), the plastic film is placed in the first vacuum chamber 130. The molded body 10 is placed such that the opening 11 faces upward. The depth of the first vacuum chamber 130 is substantially the same as the height of the molded body 10, and as a result, the upper end surface of the opening of the molded body 10 in the mounted state and the L-th vacuum The upper end surface of the opening of the chamber 130 is located on substantially the same plane. Under this condition, the opening 131 is closed by the unstretched resin film 150 using a stretchable plastic film 150. The plastic film 150 is larger than the cross-sectional shape of the first vacuum chamber 130, so that the plastic film 150 closes the opening 13 1 and closes the opening 13. The top surface of 1 is completely covered. Subsequently, the second vacuum chamber 140 is placed on the first vacuum chamber 130 such that the opening 141 faces the plastic film 150. Since the first vacuum chamber 130 and the second vacuum chamber 140 have the same cross-sectional outer shape 3, the plastic film 15

Three

0 is to be sandwiched between the periphery of the opening 13 1 of the first vacuum chamber 130 and the periphery of the opening 14 1 of the second vacuum chamber 140. . As a result, the inside of the first vacuum chamber 140 and the inside of the second vacuum chamber 140 are both airtight. In order to sufficiently maintain the airtight state in each vacuum chamber, both vacuum chambers may be fixed by a fixing means such as a fixing bracket.

Next, the inside of the second vacuum chamber 140 is evacuated by vacuum suction means (not shown) connected to the through hole 142. Thus, the pressure in the second vacuum chamber 140 is reduced, and the plastic film 150 is sucked into the second vacuum chamber 140 and gradually stretched. When the vacuum suction in the second vacuum chamber 140 is further continued, the plastic film 150 is further stretched, and as shown in FIG. 24 (b), the plastic film 150 is formed on the inner wall of the second vacuum chamber 140. In close contact. This stretching is preliminary, and the stretching ratio can be appropriately determined according to the shape of the molded body 10 on which the plastic film 150 is laminated. In general, the ratio of the surface area of the pre-stretched plastic film 150 to the surface area of the plastic film 150 after being laminated on the molded body 10 (former / latter) is 3 to 0.7, especially 2 to 0.7. 0.9 and When the plastic film 150 is preliminarily stretched in such a manner, lamination is performed in a state where the molded body i 0 and the plastic film 150 are more closely adhered to each other. In addition, lamination on the molded body 10 having a complicated shape is further facilitated. The pressure (degree of vacuum) in the second vacuum chamber 140 is such that the plastic film 150 can be pre-stretched and brought into close contact with the inner wall of the second vacuum chamber 140. Although it depends on the thickness and the material of 50, it is preferably 40 kPa or less, particularly 130 to 1 Pa as a general range. The plastic film 150 is pre-stretched and the second vacuum chamber 1

Under a state in which it is in close contact with the inner wall of the plastic film 40, the plastic film 1

Heat 50 to a predetermined temperature. By softening the plastic film 150 by this heating, the adhesiveness between the two when the plastic film 150 is laminated on the molded body 10 is further improved. In addition, lamination on a molded article i0 having a complicated shape is further facilitated. The heating temperature of the plastic film I 50 is, for example, when the glass transition temperature (T g) is polyethylene or polypyrene having a glass transition temperature of 23 ° C. or less as a constituent material, the melting point is + 30 ° C. (Melting point—70) ° C., particularly in the range of (Melting point + 5) to (Melting point—30) ° C., for example, when the constituent material is polyethylene terephthalate or polystyrene having a Tg of not lower than room temperature. (T g +5) to (T g +150) t; especially, within the range of (T g +10) to (T g +100) ° C. It is preferable because 50 is laminated in a state of being more closely adhered to the molded body 10 without breaking. When the plastic film 150 is composed of two or more materials, the glass transition point means the glass transition point of a material having the lowest glass transition point among the above materials.

Vacuum suction causes plastic film 150 to become second vacuum chamber 1 The first vacuum chamber 130 is vacuum-suctioned by a vacuum suction means (not shown) connected to the through-holes 13 in a state in which the first vacuum chamber 130 is in close contact with the inner wall of the 40. In this case, since a gap is formed between the inner wall of the opening 13 1 of the first vacuum chamber 130 and the outer wall of the opening 11 of the molded body 10, molding is performed with respect to gas flow. The inside and outside of the body 10 are in communication with each other. Therefore, by the above vacuum suction, the inside of the first vacuum chamber 130, that is, the inside and the outside of the molded body 10 are brought into a vacuum state similarly to the inside of the second vacuum chamber 140. In this case, the plastic film 150 is already in close contact with the inner wall of the second vacuum chamber 140, so that the plastic film 150 may be turned into the second by the vacuum suction in the first vacuum chamber 130. It will not be pulled back into the vacuum chamber 130 of 1. The pressure (degree of vacuum) in the first vacuum chamber 130 is not particularly limited, but is preferably 40 kPa or less, particularly i300 to 1 Pa as a general range.

Next, the vacuum suction in the second vacuum chamber L40 is stopped, and the vacuum in the second vacuum chamber 140 is broken, and the inside of the second vacuum chamber 140 is pressurized to a predetermined pressure. . This operation can be performed instantaneously by switching the three-way valve or the like. At this time, the inside of the first vacuum chamber 130 is under vacuum suction. As a result, as shown in FIG. 24 (c), the plastic film 150 which has been in close contact with the inner wall of the second vacuum chamber 140 is instantaneously in the first vacuum chamber 130, ie In the embodiment, the plastic film 150 is adhered and laminated on the inner surface of the molded body 10 by being pressed and stretched toward the inside of the molded body 10. That is, the plastic film 150 is stretched in the direction opposite to the pre-stretching direction. Plastic films 1

Since 50 is heated to a predetermined temperature by the heating means 144 just before the vacuum in the second vacuum chamber L40 is broken, the plastic film i50 is drawn and the molded body 10 is drawn. The adhesion is extremely smooth, and the stretching The accompanying tear is effectively prevented. A predetermined pressurized fluid, or simply air is used for pressurizing the second vacuum chamber 140. The pressure at that time is from 100 to 300 Pa, particularly from 200 Pa, from the viewpoint of laminating the plastic film 150 on the molded body 10 with good adhesion without breaking the plastic film 150. It is preferably ~ 100 Pa.

When the plastic film 150 is laminated on the molded body i0 while the molded body i0 is heated to a predetermined temperature, the plastic film 150 is not broken even further. Can be further laminated on the molded body 10 with better adhesion. The reason for this is that the stretchability of the plastic film 150 during lamination is kept good. To heat the molded body 10, for example, a predetermined heating means may be provided on the inner surface of the side wall of the i-th vacuum chamber 130. The heating temperature of the molded body 10 is preferably 40 to 150 ° C. from the viewpoint of preventing re-shrinkage of the plastic film 150 and production efficiency.

When the plastic film 150 is laminated, the vacuum suction in the first vacuum chamber 130 is stopped, and the inside of the first vacuum chamber 130 is returned to the atmospheric pressure. Next, the second vacuum chamber 140 is removed, and the molded body i 0 on which the plastic film 150 is laminated is taken out of the second vacuum chamber 140. At this point, the unlaminated plastic film 150 remains around the opening of the molded body 10 and is trimmed. As a result, as shown in FIG. 24 (cl), the inner surface of the molded body 10 and the upper end surface of the opening are tightly covered with the plastic film 150 and laminated.

The stretching ratio of the plastic film 150 is determined by the ratio of the surface area of the plastic film 150 laminated on the molded body 10 to the opening area of the opening 13 of the first vacuum chamber i 30 (the former). / The latter) In the production method described above, even when lamination is performed under the conditions of a high stretching ratio of 4 to 10 times, the plastic film 150 is formed without breaking the plastic film i 50. It can be laminated with good adhesion.

According to the above manufacturing method, there is an advantage that the film can be laminated regardless of whether or not the molded body 10 has air permeability. In addition, since there is no need to perform vacuum suction through the molded body 10, the time required for vacuum suction and evacuation can be significantly reduced as compared with the conventional vacuum forming method and the like, and productivity can be significantly improved. Three. Furthermore, the compact 1

7

Since 0 is not deformed, there is no need to use a reinforcing mold in combination with a conventional vacuum forming method or the like, and manufacturing costs can be reduced.

When the above-described lamination method is used, it is preferable to use a plastic film having stretchability. In this case, the thickness of the plastic film after lamination should be 5 to 200 m, especially about 20 to 100 m, and the desired properties such as water resistance and gas barrier property should be obtained. It is preferable because it can be applied to The thickness before lamination depends on the thickness after lamination and the elongation ratio, etc., but it should be about 50 to 100 mz, especially about 100 to 500 m at the time of manufacturing. It is preferable from the viewpoint of the handling property—the heating efficiency of the plastic film.

In the lamination of the plastic film 150 shown in FIG. 24, the molded body 10 is inverted (ie, the opening 11 of the molded body 10 is downward) in the first vacuum chamber 13. The plastic film 150 can be laminated on the outer surface of the molded body 10. Also, the shape of the opening 13 1 of the first vacuum chamber 〖30 is made extremely larger than the outer shape of the opening 11 of the molded body 10, so that the opening 1 1 of the first vacuum chamber 130 is formed. A large gap is formed between 3 1 and the opening 1 1 of the molded body 10 By doing so, the inner surface and the outer surface (excluding the bottom surface) of the molded body 10 can be simultaneously laminated with one plastic film 150. Further, in this case, by interposing another film between the bottom surface of the molded body 10 and the bottom surface of the inner wall of the first vacuum chamber 130, the inner surface and the outer surface including the bottom surface of the molded body 10 are simultaneously formed. It can be laminated with two films.

In the case of a molded product in which a plastic film is laminated on the inner surface and / or the outer surface, the shrinkage of the plastic film after leaving the molded product at 60 ° C. for 30 minutes is 30% or less, particularly It is preferably i 0% or less. If the shrinkage is more than 30%, the plastic 3 film partially separates

8

In addition, the molded article 10 may be broken from a portion where the plastic film is separated, and the long-term storage stability is reduced. The shrinkage ratio is obtained by measuring the distance between any two points on the surface of the molded body on which the plastic film is laminated before and after storage under the above conditions, and (1-distance before storage / distance after storage) X 1 Calculate from 0 0 In order to reduce the shrinkage to 30% or less, for example, the molded body on which the plastic film is laminated may be gradually cooled after being heated to a temperature higher than the glass transition point of the plastic film. When the plastic film is made of a laminate of two or more kinds of plastic materials, the plastic film may be heated to a temperature higher than the glass transition point of the plastic material having the lower glass transition point.

As another mode of forming the plastic layer on the outer surface and / or inner surface of the molded body, there is a mode in which the outer surface and / or the inner surface of the molded body is powder-coated to form a plastic layer.

If a solvent-based or water-based paint is used to form the plastic layer, a micro-bore may be formed in the plastic layer when the solvent evaporates, which may result in insufficient gas barrier properties (water or oxygen barrier properties). is there. Further, the molded article may be deformed by a solvent or the like. In contrast, powder coating The plastic layer formed by the mounting does not have such a disadvantage, and a molded article having a sufficient gas barrier property can be obtained.

As the powder used for the powder coating, powders such as an olefin resin, a polyester resin, an epoxy resin, and an acrylic resin are used. The powder may be formed from 100% of the resin, and may be colored by adding various pigments as necessary. In addition, conventionally known additives used in the coating composition can be used without any particular limitation. Examples of the additive include a leveling agent such as an acrylate polymer and a silicone resin, and a pinhole inhibitor such as benzoin. Each of these additives is preferably used in an amount of about 0.1 to 5 parts by weight based on 100 parts by weight of the resin. The total thickness of the plastic layer (the sum of the two when the plastic layer is formed on the inner and outer surfaces of the molded body) is appropriately selected according to the use, thickness, type of contents, etc. of the molded body. Generally, it is preferably from 100 to 400 m from the viewpoints of 50 to 60 O nu, particularly moisture permeability, productivity and cost.

A coating gun is used for powder coating, and the coating gun has a nozzle provided at the tip thereof with a corona electrode capable of forcibly charging the powder simultaneously with discharging the powder coating. The powder coating charged at the same time as the discharge is applied to the outer surface and / or inner surface of the molded body to be coated by electrostatic force. In order to ensure this coating, it is preferable that the applied voltage applied to the powder coating is set to -10 to -80 kV, particularly to -40 to -70 kV.

After applying the powder paint, a baking process is performed, and the applied powder paint is melted and cured to form a plastic layer. A baking furnace capable of heating to a predetermined temperature is used for baking. Conditions for baking are as follows: temperature: 70 to 23 O ;, from the viewpoint of productivity, smoothness of the coating film surface, and prevention of burning of pulp. Particularly, it is 140 to 200 ° C., and the time is 1 to 20 minutes, particularly 5 to 20 minutes. As still another mode of forming a plastic layer on the outer surface and / or inner surface of the molded body, a mode in which a resin solution or a resin emulsion is applied to the outer surface and / or inner surface of the molded body to form a plastic layer. is there. In this case, the thickness of the plastic layer is preferably 5 to 300 μm, particularly preferably 20 to 150 m, and the ratio of the thickness of the plastic layer to the thickness of the molded product (the former / the latter) Is preferably 1/2 to 1/100, particularly preferably L / 5 to 1/50.

If the thickness of the plastic layer is less than 5, the storage stability of the contents may not be sufficient because sufficient waterproof and moisture-proof effects cannot be obtained.If the thickness is more than 300 m, it takes time to dry the plastic layer. Occasionally, problems such as the coating liquid dripping and uneven thickness of the plastic layer may occur. The thickness of the blast-stick layer is measured by observing a cross section of the molded product under a microscope. The molded article of the present embodiment is different from a conventional method in which a coating liquid is applied to a pulp molded article to form a plastic layer, and the area of the pulp fiber constituting the molded article and the plastic layer are formed. It is clearly distinguished from the resin area. That is, in the conventional molded body, since the aqueous solution of the polymer compound penetrates into the undried state of the molded body, the boundary between the pulp fiber region and the polymer compound region is not clear. In the molded article of the above, the boundary is clear because the resin penetration is small. As a result, waterproof and moisture-proof properties can be imparted with a smaller amount of resin than before, and the pulp fiber disintegration during reuse is improved.

If the ratio of the thickness of the plastic layer to the thickness of the molded body is more than 1/2, the disintegration during reuse is inferior, and if it is less than 1/1100, sufficient waterproof and moisture-proof properties can be obtained. Can not. The thickness of the molded body is appropriately adjusted within the range where the above ratio is 1/2 to 1/100, and preferably 100 to 3 depending on the use and the like. 000 wm, more preferably 500 to 2000 m.

Resins contained in the coating liquid for forming the plastic layer include acryl-based, styrene-acryl-based, ethylene monoacetate-based, styrene-butadiene rubber-based, polyvinyl alcohol-based, vinylidene chloride-based, wax-based, fluorine-based, and silicone. Series resins, their copolymers, and combinations thereof.

In order to control the penetration of the coating solution into the molded body, the porosity of the molded body is preferably 30 to 70%, particularly preferably 40 to 60%. The porosity is calculated from the following equation (1). In the following formula (1), the density of the molded body is calculated from the weight and thickness of a part of the molded body, and the density of the material constituting the molded body is the content ratio of pulp fiber and other components. And density. Porosity ( _0/0) = ₍₁ Density of compact) Κ 100 (1)

^W) , Density of Material Constituting Molded Article If the porosity of the molded article is too low, the permeability of the coating liquid is too low, and conversely, the adhesion to the plastic layer may be low. Therefore, in consideration of the permeability of the coating solution, the Cobb water absorption degree of the molded body (JISP 8 i 4 0) a ^{5~6 0 0 gZ (m 2 ·} 2 minutes), in particular 1 0~2 00 g / (m ² · 2 minutes).

The coating liquid is spray-dried by a predetermined spraying means after pre-drying the wet pulp laminate 5 obtained in FIG. 4 (d) to a predetermined moisture content, for example, about 0.1 to 25% by weight. Applied. In this case, by setting the porosity of the molded body within the above-mentioned range, the state is such that the coating liquid hardly penetrates into the molded body. Therefore, most of the coating liquid remains on the surface of the molded product, and sufficient water and moisture resistance can be exhibited by applying a smaller amount of coating liquid than before. Wear. In addition, it is possible to prevent a decrease in the disintegration of pulp fibers during reuse. It is preferable to use a resin having a particle size of about 0.01 to 10 m as the emulsion as the coating liquid, from the viewpoint of controlling the permeation of the emulsion into the molded body.

As another mode of forming the plastic layer on the outer surface of the molded body i0, for example, there is a method of covering the outer surface of the molded body i0 with shrink film. The predetermined characters, figures, symbols, and the like may or may not be printed on the shrink film. Shrink film is used for molding 10

Four

All outer surfaces are covered. This prevents moisture and oxygen from entering from the outside to the inside, thereby preventing a reduction in the paper strength of the molded body 10 and preventing the contents from generating mold. Furthermore, the quality of the contents is prevented from deteriorating due to the intrusion of moisture or oxygen. In addition, the strength of the molded article] 0 can be further increased, and leakage of the contents can be effectively prevented.

The covering mode of the shrink film may be determined according to the type of the content.

Instead of all the outer surfaces of 0, the embodiment shown in FIG. 25 can be used. The embodiment shown in FIG. 25 is a particularly effective embodiment for accommodating contents that generate gas due to moisture absorption or the like. The shrink film 15 1 is not the entire outer surface of the molded body 10 but the contents.ている Covers the outer surface of the molded body 10 to a height that is equal to or higher than the upper end surface of 52 and lower than the upper end of the container. (The space between the upper end of the It is called "dos base"). When the content reacts due to moisture absorption and the like, and gas is generated, and the gas accumulates on the head space, the outer surface of the molded body 10 corresponding to the head space becomes a shrink film 15. If it is coated with 1, there is no escape for the gas, and the molded body 10 expands and deforms. As a result, the sitting (stability) of the molded body 10 becomes poor, or in the worst case, it bursts. On the other hand, by using the coating mode shown in Fig. 25, the generated gas is Thus, the above-described inconvenience does not occur because the material escapes to the outside of the molded body 10 through the wall surface of the molded body i0 corresponding to the above.

Further, there is also an advantage that the amount of the shrink film can be reduced by adopting the covering mode shown in FIG. However, in this case, it may be considered that moisture or oxygen may enter through the wall surface of the molded body 10 corresponding to the head base. However, in that case, moisture and oxygen come into contact with the contents indirectly through the head space. In addition, the indirect contact speed of moisture and oxygen is considerably lower in terms of mass transfer than the speed of direct contact of moisture and oxygen to the contents through the wall surface of the molded body 10. Therefore, if the molded body 10 is covered up to the height at which the contents are stored, that is, if direct contact through the wall surface of the molded body 10 is avoided, the molded body 10 corresponding to the head base is formed. There is no major inconvenience for ingress of moisture or oxygen through the 0 wall.

The shrink film 151 is made of a film such as an olefin resin or a polyester resin. For example, polyethylene terephthalate (PET) or orientes is a material having good low-temperature shrinkage and high rigidity. Polystyrene (OPS) or the like is used. In addition, polypropylene (PP), polyethylene (PE), etc. are used as materials that are thin and have good extensibility for use in shrinking (overlapping) the entire product. The above-mentioned material for the shrink film comprises a single-layer or multilayer uniaxial or biaxially stretched film. Considering shrink finish, dimensional stability, and strength, heat shrinkage (JISZ1799) is 40% or more, natural shrinkage (40%, 7 days) is 2% or less, and tensile strength in the shrinking direction It is preferable to select a material having a tensile strength of 20 × 10 ⁵ Pa or more and an elongation of 50% or more. The thickness of the shrink film 15 1 depends on the use of the molded article 10 covered with the shrink film 15 1, the thickness of the molded article 10, and the contents. It is appropriately selected according to the type of the compound, but is generally from 10 to 150 u ^ especially from 30 to 70 m.

According to the molded body 1 0 outer surface is covered with Sri Nkufuirumu, oxygen transparently resistance ^{5 0 0 cm 3 / (m} 2 · hr · atm) or less, in particular ^{1 0 0 cm 3 / (m} 2 - hr - atm) or less, and the inside of the molded body is prevented from becoming overoxidized, and the quality deterioration and deterioration of the contents are prevented. Oxygen permeability is measured by the method of JISK 712.

The molded body whose outer surface is covered with the shrink film is formed by surrounding the molded body having a moisture content of 5 to 35% by weight with the shrink film, and then irradiating the shrink film with a microphone opening to shrink the shrink film. Then, it is preferably produced by tightly coating the molded body and drying the molded body.

First, as shown in FIG. 26 (a), the entire outer surface of the molded body 10 is surrounded by a shrink film 151. As the molded body 10, it is preferable to use the one having a predetermined moisture content manufactured in FIG. 4 (ci) described above. The shrink film has a shape in which a sheet-like film is formed into a tube, one end of the tube is sealed in an arc shape (generally called an R seal), and then cut. In this state, the gap between the outer surface of the body and the bottom of the molded body 10 and the shrink film is not so large, but the gap between the outer surface of the mouth and the shrink film is relatively large.o

As shown in FIG. 26 (b), a canopy portion 1553 having a hanging wall is provided around the periphery thereof, and the entire canopy portion 153 including the hanging wall can generate heat by irradiation with a micro web. The opening of the molded body 10 is covered with the shrink film surrounding the opening by the cover 154 provided in the above. In this case, the gap between the inner surface of the hanging wall and the shrink film is preferably as small as possible. The microwave is irradiated in this state. By this irradiation, the compact

The water contained in 10 is heated to generate heat, and the generated heat shrinks the shrink film to tightly coat molded article 10. At the same time, moisture is removed from the molded body 10 and final drying of the molded body is performed. That is, in the present production method, two steps of shrinkage of the shrink film 151 and final drying of the molded body 10 can be performed in one step of irradiation with a micro web.

When the microwave is irradiated, particularly at the opening of the molded body 10, the irradiation also generates heat in the canopy part 15 3 of the over cover 154 together with the molded body 10, and the heat causes shrinkage. The film shrinks. When the gap between the shrink film and the outer surface of the opening becomes smaller due to this shrinkage, heat generated from the opening itself is added to the shrink film, so that shrinkage of the shrink film is further promoted. As a result, it is possible to extremely easily shrink the opening which is not easy to shrink due to a difference in diameter from other portions in the molded body 10. Moreover, the appearance of the shrink film after shrinking is improved. As described above, shrinkage of the shrink film using the over-cover is effective when the diameter of the formed body is not the same from the opening to the bottom, and particularly, the diameter of the opening is smaller than that of the body. When the diameter is small, it is effective when the diameter of the opening is 50% or less of the diameter of the trunk. As described above, the canopy part 153 of the over cover 154 is capable of generating heat by microwave irradiation. Considering that the canopy i53 can be easily processed into a shape close to the outer shape of the molded body, has good heat generation efficiency, and has good shrink film covering and operability. Then, it is preferable to be composed of wood, paper, sponge, non-woven fabric or the like containing water. Further, the shape of the canopy part 1553 is such that it can surround the shrink film located on the outer surface of the opening of the molded body 10. There is no particular limitation as long as it is in the form.

The wavelength of the irradiated microwave is generally from 300 MHz to 300 GHz, and a wavelength which maximizes the heat generation efficiency is appropriately selected. The molded body 10 covered with the shrink film in this manner is thereafter filled with the contents. Further, depending on the type of the content, as another method, the pre-dried molded body 10 may be filled with the content and then covered with a shrink film.

The present invention is not limited to the above embodiment, and various modifications are possible. In addition, the processes, devices, members, and the like in each of the above embodiments can be appropriately replaced with each other. Further, as described above, the second to eighth embodiments have been described as the embodiments of the first invention. However, these embodiments are also applied as the embodiments of the second invention. Further, in the mold used in the present invention, two papermaking split dies may be used as one set, or three or more papermaking split dies may be used according to the shape of the molded object to be molded. They may be used as a set. The same applies to the heating type. Industrial applicability

ADVANTAGE OF THE INVENTION According to this invention, the rising angle of a side wall is large, and the molded object which mainly has pulp and has a deep bottom is obtained. Further, according to the present invention, it is possible to obtain a molded article mainly composed of pulp, which does not decrease in strength, has a good external impression, and has a concave or convex portion having a predetermined shape in an opening or a body. Such compacts have low manufacturing costs and can be reused or incinerated after use, which leads to reduction of waste.

Claims

The scope of the claims

1. It has a bottom and a trunk, the angle の between the grounding surface of the bottom and the outer surface of the side wall of the trunk is more than 85 °, and the height of the trunk is 5 O mm or more; A molded product mainly composed of panolep.

2. The molded article according to claim 1, wherein no joint exists.

3. It has a bottom, a torso, and an opening, and the body has a concave or a convex, or an inwardly extending part is formed around the opening. And the concave portion and the convex portion are continuous only in the horizontal direction or the oblique direction of the molded body at the opening which is linearly continuous, and there is no seam in the body portion. A molded body formed mainly of pulp.

4. The molded article according to claim 3, wherein the molded body has a thickness of 0.1 mm or more, has a corner, and the thickness of the corner is larger than the thickness of the other part. .

5. The molded body has a lid that opens and closes an upper end opening of the molded body, and the lid and / or the measuring container is a thin and high-density first hinge portion and a Z or second hinge. 4. The molded body according to claim 3, wherein the molded body is connected to the molded body by integral molding via a portion.

6. The molded body has a lid that opens and closes an upper end opening of the molded body, and the lid is manufactured separately from the molded body, and a hinge provided on the lid. The molded body according to claim 3, wherein the molded body is fixed to the molded body via a connecting portion having a portion.

7. The molded article according to claim 3, wherein an upper end opening of the molded article is covered with a paper seal, and a weighing container is detachably attached to the paper seal.

8. The measuring container according to claim 1, wherein the mounting portion of the measuring container is integrally formed. The molded article according to item 3.

9. The molded article according to claim 3, wherein a hook is attached to the trunk, and a hook is attached to the molded article via the hook attachment.

10. The molded article according to claim 3, wherein a plastic layer is formed on an outer surface and / or an inner surface.