WO2001064527A1 - Corps moule en pate - Google Patents

Corps moule en pate Download PDF

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Publication number
WO2001064527A1
WO2001064527A1 PCT/JP2001/001465 JP0101465W WO0164527A1 WO 2001064527 A1 WO2001064527 A1 WO 2001064527A1 JP 0101465 W JP0101465 W JP 0101465W WO 0164527 A1 WO0164527 A1 WO 0164527A1
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WO
WIPO (PCT)
Prior art keywords
neck
mouth
cap
molded body
pulp
Prior art date
Application number
PCT/JP2001/001465
Other languages
English (en)
Japanese (ja)
Inventor
Kenichi Otani
Yoshiaki Kumamoto
Original Assignee
Kao Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kao Corporation filed Critical Kao Corporation
Priority to EP01906353A priority Critical patent/EP1260447B1/fr
Priority to US10/204,859 priority patent/US7077933B2/en
Priority to DE60129006T priority patent/DE60129006T2/de
Priority to AU2001234194A priority patent/AU2001234194A1/en
Publication of WO2001064527A1 publication Critical patent/WO2001064527A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/023—Neck construction
    • B65D1/0246—Closure retaining means, e.g. beads, screw-threads

Definitions

  • the present invention relates to a pulp molded article having a screw portion and having a good sealing property with a cap. More specifically, the present invention relates to a pulp molded article having a screw portion to which a shape of a molding surface of a mold is faithfully transferred. In addition, the present invention
  • the present invention relates to a method for producing a molded body.
  • Conventional technology
  • Japanese Patent Application Laid-Open No. 8-320600 discloses a pulp molded product having a convex portion such as a screw portion on the surface of the molded product.
  • the projections are attached, for example, separately in a later step by bonding or the like, or are formed in a drying step of the molded body.
  • an object of the present invention is to provide a pulp molded article having a screw portion and having good sealing performance with a cap.
  • Another object of the present invention is to provide a pulp molded article having a thread portion, which has high durability against repeated opening and closing operations of the cap.
  • a further object of the present invention is to provide a pulp molded article in which the shape of a concave portion on a molding surface of a mold is faithfully transferred and a threaded portion having sufficient strength is formed.
  • a screw portion is formed on the outer surface of the mouth and neck, and the neck and the cap are measured when the cap having the screw portion is screwed into the mouth and neck. The object has been achieved by providing a pulp molded article having an overrun torque of 1 N ⁇ m or more.
  • the present invention also provides a method for producing the pulp molded article, wherein a thread is formed at a site corresponding to the thread on a papermaking surface of the mold for papermaking.
  • a method for producing a pulp molded article in which a pulp molded article in which the screw portion is formed on the outer surface of the mouth and neck by papermaking using the papermaking mold. is there.
  • FIG. 1 is a perspective view showing one embodiment of the pulp molded article of the present invention.
  • FIG. 2 is an enlarged sectional view of the mouth and neck of the pulp molded article shown in FIG.
  • FIG. 3 (a) is a partially cutaway perspective view showing another embodiment of the pulp molded article of the present invention.
  • FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.
  • FIG. 5 is a cross-sectional view of the thread in the width direction.
  • Fig. 6 (a) shows the pulp slurry injection process
  • Fig. 6 (b) shows the supply of pressurized fluid
  • Figure 6 (c) is the step of opening the papermaking mold.
  • Fig. 7 (a) shows the core insertion step
  • Fig. 7 (b) shows the heating drying step
  • Fig. 7 (c) shows the heating mold opening step.
  • FIG. 1 shows a perspective view of the pulp molded article 1
  • FIG. 2 shows an enlarged sectional view of the mouth and neck.
  • FIG. 3 shows a partially cutaway perspective view of a pulp molded article 1 ′ having a form different from that of FIG.
  • the molded body 1, 1 ′ has a mouth and neck portion 2, 2 ′ opened at the top thereof, and further has a body portion 3, 3 ′ and a bottom portion 4, 4 ′, and has a cylindrical shape.
  • the diameter of the cervix 2, 2 ' is smaller than the diameter of the torso 3, 3'.
  • the molded bodies 1, 1 ′ have the body portions 3, 3 ′ formed at right angles to the bottom portions 4, 4 ′. That is, the taper angles of the trunks 3 and 3 'are 0 degrees.
  • the molded bodies 1 and 1 ' have an overall height of 50 mm or more, preferably 10 O mm or more. Note that, depending on the use of the molded bodies 1 and 1 ′, the body portions 3 and 3 ′ may not be formed at right angles to the bottom portions 4 and 4 ′. In addition, there are no seams or thick portions in the molded bodies 1 and 1 ′. As a result, the strength of the compacts 1 and 1 'is increased, and the compact has a good appearance impression. In the molded body 1 shown in FIG.
  • the mouth and neck 2 has a first mouth and neck 2a located at the tip side of the neck 2 and a larger diameter than the first mouth and neck 2a. And a second mouth and neck 2b located between the first mouth and neck 2a and the trunk 3.
  • the first mouth and neck 2a and the second mouth and neck 2b are connected via a first step 7a.
  • the second mouth and neck 2b is connected to the torso 3 via the second step 7b.
  • the cervix 2 has a stepped shape.
  • the mouth and neck 2 ′ has a cylindrical straight shape.
  • the c has a flange portion 8 in which the open end peripheral edge is formed by sown about one revolution outward flange shown in FIG. 1
  • the sealability between the mouth and neck 2 and the top surface of the cap described later is enhanced by the part 8.
  • a resin film 9 is laminated on the inner surface of the molded body 1 to impart water resistance to the molded body 1. Due to the lamination of the resin film and the above-described flange portion 8, the molded body 1 is particularly suitable for containing a liquid.
  • the amount of the material is preferably 1 to 70% by weight, particularly preferably 5 to 50% by weight.
  • Other materials include inorganic substances such as talc and force-origin, inorganic fibers such as glass fiber and carbon fiber, synthetic resin powder such as polyolefin, synthetic fiber, non-wood or vegetable fiber, polysaccharide, etc. Is mentioned.
  • the second mouth and neck portion 2b of the molded body 1 shown in FIG. 1 has a screw portion formed of a spiral screw thread 5 on its outer surface.
  • a screw portion made of a spiral screw thread 5 ' is also formed on the outer surface of the mouth-neck portion 2' of the molded body 1 shown in FIG.
  • a cap (not shown) having a thread portion formed of a thread complementary to the thread 5, 5 'is screwed into the mouth and neck 2, 2'.
  • the cap For example, easy opening and closing of the cap is important In some cases, or when the cap is frequently opened and closed, it is preferable to use a round screw or a triangular screw.If you want to tighten the cap with a large torque, you do not want to loosen the cap. If you want to increase the pull-out strength of the cap, trapezoidal screws are preferred. As shown in Fig. 5, the shape of the threads in the compacts 1 and 1 'is a trapezoidal screw with a trapezoidal cross section. In the molded articles 1 and 1 ′, the overrun torque force S between the mouth and neck 2 and 2 ′ and the cap measured with the cap screwed on the mouth and neck 2 and 2 ′.
  • the sealing performance between the mouth and neck 2, 2 'and the cap is improved, and the cap is less likely to be loosened due to vibration during transportation or the like, and is housed in the molded body 1, 1'. Leakage of the leaked contents is effectively prevented.
  • the flange 8 is formed at the opening end as described above, so that the sealing performance with the cap is further improved. If the overrun torque is 1 N.m or more, the larger the value, the better the sealing performance between the mouth and neck 2, 2 'and the cap is improved.
  • the overrun torque value is 5 N ⁇ m
  • the upper limit of overrun torque achievable with current technology is about 1 ON ⁇ m.
  • a detailed measuring method of the overrun torque will be described in an embodiment described later.
  • the width of the thread 5, 5 'in the width direction is S (mm)
  • the width in plan view is W (mm).
  • the thread 5, 5 'must satisfy the relationship of the following Expression (1) and Expression (2) or Expression (3). Is preferred.
  • the threads 5, 5 'with a shape corresponding to the concave shape of the mold are faithfully formed to prevent the threads 5, 5' from breaking, making the surfaces of the threads 5, 5 'even smoother, and From the viewpoint of further increasing the density of the peaks 5, 5 ', the above equation (1) is preferably represented by the following equation (1)'. 1 ⁇ S / W ⁇ 1.3 (1) 'In the present embodiment, the width of the thread (that is, the length of the base of the trapezoid) W should be 0.5 to 1 Omm, particularly 2 to 6 mm. Is preferable from the viewpoint of generating a sufficient tightening force and the degree of freedom of the size and shape of the molded body 1.
  • the thickness t (mm) of the molded bodies 1 and 1 ′ (that is, the thickness of the mouth and neck 2 and 2 ′) is determined appropriately according to the use of the molded bodies 1 and 1 ′.
  • the range is preferably from 0.2 to 10 mm, particularly preferably from 0.4 to 2 mm. Within this range, the sealing performance between the mouth and neck 2, 2 'and the cap is further improved, and the durability when the cap is opened and closed frequently is further improved.
  • Rise angle of basal plane B of mouth and neck 2, 2 'at thread 5' (Refer to Fig. 5) When the temperature exceeds 90 °, the follow-up due to the expansion of the core described below becomes insufficient, and the pressing of the molded body by the core becomes insufficient.
  • the corner 5a (see FIG. 5) of the portion where the screw threads 5, 5 'rise from the basal plane B of the mouth and neck 2, 2' facilitates the transfer of the concave shape of the heating mold described later. It is preferable that the corner portion 5a has a curvature R of 0.1 mm or more, particularly 0.3 to 5 mm. Note that the curvatures of the two corners 5a, 5a of the screw threads 5, 5 'shown in FIG. 5 may be the same or different. For example, if the cross-sectional shape of the threads 5, 5 'in the width direction is not a trapezoidal shape with equal legs as shown in Fig.
  • the curvature of 5a is often different. However, in either case, it is preferable that the curvatures of the two corners 5a, 5a are both in the above-described range.
  • the height H of the threads 5, 5 'from the base surface 2a is appropriate considering the ease of forming the threads 5, 5' and the tightening force between the threads 5, 5 'and the cap. Value is determined. Generally, the height H of the threads 5, 5 'is 0.3 mm or more, especially 0.3 to: L 0 mm, especially 0.5 to 4 mm, so that sufficient tightening force is generated. It is preferable because it can be easily opened and closed.
  • a pulp molded article having a thread portion having the shape and dimensions as described above has been difficult to produce by a conventional method, but can be easily produced by using a preferred method described later.
  • the effective number of turns of the screw portion is preferably 0.75 or more. If the effective number of turns is less than 0.75 turns, the cap pull-out strength of the screwed cap will be low, and the tightening force of the cap will be too weak to obtain sufficient sealing performance. There is. Also, screw the cap onto the mouth and neck 2, 2 ' The difference between the tightening torque at the time of opening and the opening torque at the time of removing the screwed cap is measured under the same conditions (the same conditions for the shape and dimensions of the container and the cap). It is smaller than the case with the cervix and plastic cap.
  • a screw stopper rib 6 is formed to prevent a predetermined amount or more of screw engagement with a screw thread forming a screw portion.
  • a screw stopper rib 6 ′ is also formed near the connection between the neck portion 2 ′ and the trunk portion 3 ′ in the mouth-neck portion 2 ′ of the molded body 1 ′ shown in FIG.
  • the screw stopper ribs 6 and 6 ' may be of a type in which the cap is stopped by abutting on the end face of the thread of the cap, or a type in which the thread of the cap passes over the cap and stops. It's a good thing.
  • the number of threads is four, so four thread stop perforated ribs 6, 6' are formed every 90 degrees in the cross section of the mouth and neck 2, 2 '. I have. This state will be described with reference to FIG. 4 taking the molded body 1 ′ as an example. As shown in FIG.
  • the screw stopper rib 6 ′ has a first cross-section parallel to the normal to the outer surface of the mouth-neck 2 ′ in the cross-section of the mouth-neck 2 ′.
  • Surface 6a, and a second surface 6b that smoothly connects the first surface 6a and the outer surface of the cervix 2 'in the screwing direction C of the cap. .
  • the center line average roughness Ra (JISB 0601) of the neck 2, 2 'including the thread 5, 5' is preferably 50 ⁇ or less, more preferably 25 // m or less. More preferably, if it is 10 / m or less, the sealing performance between the mouth and neck 2, 2 'and the cap is further improved.
  • a method of performing a predetermined polishing process can be cited. In particular, when the manufacturing method described later is used, such a polishing process is performed. Without this, the mouth and neck 2, 2 'can be made highly smooth.
  • the value is about 0.1 im.
  • the maximum height Ry (JISB 0601) of the cervix 2, 2 'including the threads 5, 5' is less than 500 / im; New
  • the surface strength of the mouth and neck 2, 2 'including the threads 5, 5' (hardness of surface peeling (difficulty of peeling), difficulty in fluffing during use, and decrease in strength of mouth and neck)
  • the measured value of the Wax pick method (JISP 8129) as a measure of difficulty is preferably 5 A or more, more preferably 1 OA or more, and still more preferably 16 A or more.
  • the durability of the cap for repeated opening and closing operations is increased, and the fluff of the pulp fiber, peeling of the paper, falling off of the paper dust, etc. are prevented, and the aesthetic appearance of the molded bodies 1 and 1 'is prevented.
  • the method include a method of externally or internally adding a synthetic resin or a natural resin to the mouth and neck 2,2 'including the threads 5,5'. Methods for externally adding these resins include laminating the resin film on the neck 2, 2 'including the threads 5, 5', coating the resin liquid, and impregnating the resin liquid.
  • Examples of the internal addition method include a method in which a resin is added in advance to a pulp slurry as a raw material of the molded articles 1 and 1 ′.
  • Examples of the resin finolem include a polyrefin film and a polyester film, and it is particularly preferable to use a polyester shrink film.
  • Examples of the resin liquid used for the coating or impregnation or the resin added to the pulse slurry in advance include acryl-based resins, styrene-based resins, polyester-based resins, and polyolefin-based resins. Resins, synthetic rubber resins, beer acetate resins, polyvinyl alcohol resins, wax resins, polyacrylamide resins, polyamide epichlorohydrin resins.
  • the cap is screwed into the mouth and neck 2, 2 ′, and the threads of the threaded portions of the mouth and neck 2, 2 ′ and the cap are respectively engaged.
  • the cap has a pull-out strength of preferably 5 N or more, more preferably 10 N or more, measured under the condition that the amount is 0.5 mm and the number of turns is one.
  • the sealing performance between the mouth and neck 2, 2 'and the cap is further improved, and the leakage of the contents contained in the molded articles 1, 1' is prevented. Even more effectively, even when the molded body 1, 1 'is lifted by grasping only the cap, the cap does not come off and the contents are prevented from leaking. As in the case of the above-mentioned overrun torque, it is preferable that the larger the value of the pull-out strength is, the better the sealing property between the mouth and neck 2, 2 'and the cap is improved. 1 'manufacturing method and molded body 1, 1' Although it depends on the composition and the like, it is practically sufficient if the upper limit of the drawing strength is about 700 N.
  • Threads 5, 5, neck 2, 2 'comprising its density is 0.. 4 to 2. 0 g Bruno cm 3, especially 0.6 to 1. And the S g Z cm 3 are erased, the durability It is preferable from the viewpoints of properties and sealing properties.
  • the density is calculated by cutting a section of an arbitrary size from the mouth and neck 2, 2 ', measuring the weight of the section, and measuring the size (area) and the volume obtained from the measurement of the thickness of the section. Is done.
  • the mouth and neck 2, 2 'including the threads 5, 5' should have a lateral compressive strength of 20 N or more, especially 3 ON or more, to prevent buckling of the mouth and neck 2, 2 '. I prefer.
  • the vertical compressive strength of the cervical region 2, 2 ' is preferably 10 ON or more, particularly preferably 30 ON or more, and the upper limit of about 70 ON is sufficient for practical use. It is.
  • These compressive strengths are measured at a compression speed of 20 mm / min using a Tensilon tensile tester.
  • the drop strength of the mouth and neck 2, 2 '(JISZ 1703) is preferably such that cracking and deformation do not occur in a single drop from a height of 1.2 m. . When measuring the drop strength, the compacts 1, 1 'are dropped so that the mouth and neck 2, 2' hit the drop surface.
  • the mouth and neck 2, 2 'including the threads 5, 5' have a moisture permeability (JISZ 0 208) force S lOO g (m 2 ⁇ 24 hr) or less, especially 50 (m 2 ⁇ 24 hr) or less is preferable in terms of preserving the contents (for example, a point that prevents caking that hardens due to the absorption of water by the detergent).
  • the compacts 1 and 1 ′ of the present embodiment have a vertical compressive strength of 100 N or less. Above, especially 300 N or more is preferable from the viewpoint of preventing buckling of the compacts 1 and 1 '. If the upper limit of the vertical compressive strength is about 70 ON, it is practically sufficient.
  • the method of measuring the vertical compressive strength is as described above.
  • the drop strength (JISZ1703) of the compacts 1 and 1 ' can be divided by one drop from a height of 1. ⁇ Preferably, no deformation occurs.
  • the molded bodies 1 and 1 ' are filled with the contents (basically filled with water, and in the case of commercial products, filled with the specified amount). Seal 2 and 2 'with a cap.
  • a papermaking mold having a threaded portion at a site on the papermaking surface of the papermaking mold corresponding to the threaded portion of the molded article 1 ′ is used.
  • a molded product 1 'having a screw portion formed on the outer surface of the mouth and neck portion 2' is formed by papermaking using a mold. Specifically, as shown in FIG. 6 (a), first, as shown in FIG. 6 (a), two halves 11 and 11 are formed.
  • a papermaking mold 10 in which is formed is prepared.
  • a thread 16 hereinafter referred to as a corresponding thread
  • the corresponding thread 16 preferably satisfies the relationships (4) and (5) described below.
  • the cavity 12 in the papermaking mold 10 communicates with the outside of the papermaking mold 10 via a slurry injection port 15 opened to the outside.
  • Kya The inner surface of the bitty 12 is covered with a papermaking net (not shown) having a mesh of a predetermined size.
  • Each of the split dies 11 and 11 has a plurality of communication paths 13 communicating from the inside thereof (that is, the inner surface of the cavity 12) to the outside.
  • Each communication path 13 is connected to suction means (not shown) such as a suction pump.
  • a filling nozzle 17 is inserted into the slurry inlet 15, and a predetermined amount of pulp slurry is injected into the cavity 12 through the filling nozzle 17.
  • the pulp slurry concentration at this time is generally 0.1 to 5% by weight.
  • the pulp slurry may or may not be heated.
  • the temperature of the pulp slurry can be in the range of 0 to 90 ° C, more preferably 10 to 70 ° C, and still more preferably 40 to 40 ° C. It can be. It is preferable that the pulp slurry is heated to a high temperature because the dewatering efficiency increases.
  • the inside of the cavity 12 is sucked under reduced pressure through the communication passage 13 toward the outside of the papermaking mold 10 to suck the moisture in the pulp slurry and the cavity 12
  • the pulp fibers are deposited on the papermaking net that covers the inside of the pulp.
  • a water-containing pulp molded article 1 'formed by depositing pulp fibers is formed on the papermaking net.
  • a predetermined amount of water (dilution water) is pressurized and injected into the cavity 12 at the initial stage, at the beginning or at the end of the formation of the molded body 1 ′, and the concentration of the pulp slurry in the cavity 12 is increased.
  • the initial stage of formation refers to a state in which the pulp supplied into the cavity 12 is 30% or less, particularly 20% or less of the whole pulp required for molding.
  • the final stage of formation refers to a state in which the pulp supplied into the cavity 12 accounts for 70% or more, particularly 80% or more, of the entire pulp required for molding. It is preferable that the supply amount of the dilution water is such that the concentration of the pulp slurry is diluted to 80% or less, particularly to 20 to 60%.
  • the filling nozzle 17 is used as a supply means for pulp slurry and a pressurized fluid described later.
  • the filling nozzle 17 is a driving plate 17a, a nozzle 17b penetrating the driving plate vertically, a three-way valve 17c attached to the upper end of the nozzle 17b, and a three-way valve 17 A slurry supply pipe 17d and a pressurized fluid supply pipe 17e connected to c are provided.
  • the nozzle 17b is selectively connected to the slurry supply pipe 17d and the pressurized fluid supply pipe 17e.
  • the nozzle 17b is connected to the slurry supply pipe 17d.
  • the driving plate 17a is inserted into the slurry inlet 15 so that the slurry inlet 15 is closed.
  • the formed compact 1 ′ is subjected to a dehydration step.
  • the papermaking mold 10 is sucked from the inside to the outside through the communication passage 13.
  • the three-way valve 17c is switched to connect the nozzle 17b to the pressurized fluid supply pipe 17d, and pressurize.
  • a predetermined pressurized fluid is supplied into the cavity 12 from a fluid supply source (not shown).
  • the slide Li one inlet 1 5 are hammering plate 1 7 a closed wire carrier Sensitivity 1 in 2 at £ here which is airtight, the airtight state, Canon Activity 1 in 2 Does not mean a completely airtight state, but means that the inside of the cavity 12 is airtight to such an extent that the pressure inside the cavity 12 becomes higher than the pressure described later by blowing the pressurized fluid.
  • the blown pressurized fluid passes through the molded body 1 ′ and is discharged outside through the communication passage 13.
  • the pressurized fluid for example, steam or superheated steam (both are collectively referred to as steam) can be used, and it is particularly preferable to use superheated steam.
  • the temperature of the water contained in the molded article 1 ′ instantaneously rises due to the condensation heat transfer by the steam, and the viscosity and surface tension of the water can be reduced.
  • the moisture held in the molded body 1 ′ It is blown off very quickly and very efficiently. As a result, it is possible to improve the dewatering efficiency. Since this dehydration method does not mainly involve heat exchange, it is a very energy-efficient method. In addition, since dehydration is completed instantly, the dehydration time can be reduced. Since dehydration does not use a core made of an elastic material used in a heating and drying step described later, machine time for inserting the core into the cavity is not required, and the machine time can be reduced.
  • the blowing pressure is lower than the pressure for press dewatering, there is also an advantage that the surface of the obtained molded body 1 'is hard to have a trace of a papermaking net, and a molded body having a good appearance can be obtained.
  • the steam is preferably blown in such a way that the pressure in the cavity 12 is at least 98 kPa, in particular at least 1996 kPa, in particular at least 294 kPa. .
  • the pressure in the cavity 12 due to the blowing is preferably higher if the pressure is equal to or higher than the above value.However, the degree of water removal gradually becomes saturated as the blowing pressure increases, so that it is economically viable.
  • the upper limit of the pressure is about 980 kPa.
  • the pressure in the cavity 12 refers to the difference between the inlet pressure and the exit pressure of steam into the cavity 12.
  • the steam is blown when the slurry remains in the cavity 12 or at the end of the formation of the molded body 1 ', the aforementioned dilution water supplied into the cavity 12 is filled in the cavity 12. It is preferable to carry out the process from the point where it remains in the water (this causes the water in the cavity 12 to be forcibly discharged to the outside of the mold and shortens the drainage time.
  • Dehydration is completed in a very short time, preferably from 2 seconds to 20 seconds, particularly from 3 seconds to 15 seconds, for example, so that the water content before dehydration is 75 to 80 weight.
  • the molded body is dewatered to about 40 to 70% by weight / about 0.
  • the superheated steam When superheated steam is used as the steam, the superheated steam has a mold inner pressure equal to or higher than the above-mentioned value and the steam is generated. Not condensed until just before it is blown into the mold It only needs to be overheated.
  • the steam may be sufficiently heated, but the dewatering effect is not significantly changed.
  • compressed air As the pressurized fluid used for dewatering the molded body 1 ′, compressed air may be used in addition to the above-mentioned steams. By blowing compressed air, moisture is instantaneously removed from the wet molded body 1 ′ by a physical mechanism that does not mainly perform heating and drying by heat exchange.
  • the compressed air is blown in such a way that the pressure in the cavity 12 is at least 1996 kPa, in particular at least 294 kPa.
  • the upper limit of the pressure is about 1471 kPa for the same reason as for steam.
  • the compressed air blowing time is preferably from 10 to 60 seconds, especially from 15 to 40 seconds.
  • the pressure (original pressure) of the compressed air is not particularly limited as long as the pressure inside the mold is equal to or higher than the above value. For the points that are not described in detail for the compressed air, the detailed description for the steams is applied as appropriate.
  • Vapors and compressed air may be used either one of these Urn Chi, but preferred properly the correct preferable to use a combination of both in terms of dewatering efficiency c particular, continue compressed air to blow the vapors It is preferable to blow it.
  • the reason is that if the blowing time of steam is long, there is a case where a large difference occurs in the distribution of the water content in the upward and downward directions of the molded article 1 ′. To prevent this, first blow steam. This is because it is effective to blow compressed air after sufficiently raising the temperature of the slurry and the water contained in the molded body.
  • the pressure of steam is more than 98 kPa, especially more than 196 kPa, especially more than 294 kPa, and the blowing time is 2 seconds to 20 seconds, particularly 3 seconds to 15 seconds, is preferred, while the pressure of the compressed air is more than 196 kPa, especially more than 294 kPa, and the blowing time is 2 It is preferably from 25 to 25 seconds, especially from 5 to 20 seconds. Continuous blowing of steam and compressed air is preferable from the viewpoint of power dehydration efficiency.
  • FIGS. 7 (a) to 7 (c) sequentially show the heating and drying process, where FIG. 7 (a) shows the core insertion process, FIG. 7 (b) shows the heating and drying process, and FIG.
  • c) is the step of opening the heating mold.
  • a heating mold 20 for separately forming a cavity 22 having a shape corresponding to the outer shape of the molded body 1 'to be formed by combining a pair of split molds 21 and 21 is prepared separately.
  • the heating mold is heated to a predetermined temperature.
  • the heating mold has the same cavity shape as the papermaking mold.
  • the molded body 1 ′ in a water-containing state, which has been dehydrated to a predetermined water content, is loaded into the heated mold cavity of the heating die by using a predetermined soldering means. No nets are placed on the inside of cavity 22.
  • Each of the split dies 21 and 21 has a plurality of communication passages 23 communicating from the inside thereof (that is, the inner surface of the cavity 22) to the outside.
  • Each communication path 23 is connected to suction means (not shown) such as a suction pump.
  • suction means such as a suction pump.
  • a screw thread (hereinafter referred to as a corresponding screw thread) 26 that satisfies the following formulas (4) and (5) corresponds to the screw thread 5 'of the molded body 1'. It is formed in the part which does.
  • the corresponding thread 26 satisfies the following formulas (4) and (5), assuming that the circumferential length in the width direction is s (mm) and the width in plan view is w (mm). .
  • the heating die 20 having the corresponding thread 26 that satisfies such a relationship By using the heating die 20 having the corresponding thread 26 that satisfies such a relationship, the thread 5 ′ having a shape corresponding to the shape of the corresponding thread 26 is faithfully formed, and the thread 5 ′ is formed. Is prevented, the surface of the thread 5 ′ becomes smooth, and the density of the thread 5 ′ is increased.
  • the angle ⁇ ′ of the corresponding thread 2 6 corresponding to the rising angle 0 of the thread 5 ′ is more than 0 degree corresponding to the rising angle ⁇ 9 Preferably it is less than 0 degrees.
  • the corresponding thread 26 corresponding to the corner 5 a of the thread 5 ′ i.e., the inner surface of the mold corresponding to the base surface B of the mouth-neck portion 2 ′ of the molded body
  • the curvature R 'of the corner portion of the falling portion is 0.1 mm or more, particularly 0.3 to 5 mm.
  • expansion / contraction means that the core 24 expands and contracts and its volume changes, and that the core 24 itself does not expand and contract but supplies fluid to the interior or removes fluid from the interior. This includes both cases where the volume changes.
  • the former include a core made of an elastic material such as natural rubber, urethane, fluorine-based rubber, silicone-based rubber, or elastomer, and examples of the latter include a core made of an elastic material.
  • Plastic materials such as polyethylene and polypropylene, and films of these plastic materials
  • a bag-shaped (balloon-shaped) core made of a stretchable elastic material is used as the core 24.
  • a predetermined fluid is supplied into the core 24 to expand the core 24, and the molded body 1 containing water is expanded by the expanded core 24.
  • ′ Is pressed toward the inner surface of the heating mold 20, that is, the inner surface of the cavity 22.
  • the drying of the molded body 1 ′ proceeds, and the inner surface shape of the cavity 22 is transferred to the molded body 1 ′.
  • the corresponding screw thread 26 formed in the heating mold 20 satisfies the relationship of the above-described equations (4) and (5), the pulp deposited in the corresponding screw thread 26 is formed. Even if the width of the pile of fibers is extended to the circumferential length s of the corresponding thread 26 in the width direction and the pile is given a convex shape, the pile is sufficiently pressed without breaking. Thus, the shape of the corresponding thread 26 is faithfully transferred, and the density in the corresponding thread 26 is sufficiently increased.
  • the fluid used to expand the core 24 includes, for example, air (pressurized air), hot air (heated pressurized air), superheated steam, oil (heated oil), and various other liquids. Is used. In particular, it is preferable to use air, hot air, or superheated steam from the viewpoint of operability and the like.
  • the pressure at which the fluid is supplied is preferably from 0.01 to 5 MPa, particularly preferably from 0.0 to! 3 MPa.
  • the thread 5 ′ has a smooth surface, a higher density and a higher strength.
  • pulp slurry is supplied into the cavity of the papermaking mold in which a cavity having a predetermined shape is formed by combining a pair of molds and combining the molds. Then, after forming a water-containing molded body on the inner surface (molding surface) of the cavity, a scalable hollow core is inserted into the molded body, and then a predetermined fluid is injected into the core.
  • the core is supplied to expand the core, and the expanded core is pressed against the inner surface (molding surface) of the cavity by the expanded core to dewater.
  • the structure of the papermaking mold in this manufacturing method is the same as that shown in Fig. 6 (a), and the corresponding screw thread is located on the inner surface of the cavity of the papermaking mold corresponding to the thread of the molded body. Is formed.
  • the core for pressing and dewatering the molded body the same one as shown in FIG. 7 (a) can be used.
  • the fluid used to expand the core and the supply pressure thereof can be the same as in the above-described manufacturing method.
  • the fluid in the core is drained and reduced.
  • the reduced core is removed from the molded body, and the papermaking mold is opened.
  • the molded body in a water-containing state having a predetermined moisture content is taken out by a predetermined soldering means. Threads are formed at the mouth and neck of the obtained molded body.
  • the removed compact is then subjected to a heating and drying process.
  • the heating and drying process is almost the same as the above-described pressure dehydration process using a core, except that papermaking and dewatering are not performed and the heating mold is used in a state heated to a predetermined temperature. Is performed.
  • a heating mold in which a cavity having a shape corresponding to the outer shape of the molded body to be molded is formed by combining a set of split dies, and the heating mold is provided in a predetermined shape. Heat to temperature. Then, in the heated cavity of the heating mold, the water-containing molded body dehydrated to a predetermined water content is loaded by predetermined soldering means. Next, another core having a different shape and / or material from the core used in the pressure dehydration step is inserted into the molded body, and a fluid is supplied into the core to expand the core. The formed body is pressed toward the inner surface of the cavity by the core. The material of the core and the supply pressure of the fluid can be the same as in the pressure dehydration step.
  • the molded body is heated and dried under this condition. After that, the same operation as in the above-described manufacturing method is performed.
  • the present invention is not limited to the above embodiment.
  • a pulp molded article that satisfies the relationship of the above formulas (1) and (2) or (3) can be manufactured by a method other than the above-described manufacturing method.
  • the pulp fiber is completely filled in the corresponding screw thread satisfying the relationship of the above formulas (4) and (5) by the pressing by the core, and the screw thread is formed.
  • a heating die having a corresponding screw thread that satisfies the above-mentioned formula (5) but is deeper than the corresponding screw thread is used, and the degree of pressing of the pulp fiber is appropriately adjusted to adjust the corresponding screw thread.
  • a pulp molded body was manufactured by the method shown in FIGS. 6 (a) to 6 (c) and FIGS. 7 (a) to 7 (c).
  • a paper strength agent, aluminum sulfate, a sizing agent, a retention agent, etc. are added to reduce the overall concentration to 1%. % By weight.
  • C showing the shape and dimensions of the thread in Table 1 in the neck of the resulting molded article
  • Example 2 a polyester shrink film was laminated on the mouth and neck of the molded body.
  • Example 3 an acrylic resin emulsion was coated on the mouth and neck of the molded body.
  • Example 4 50 parts by weight of an emulsion resin of an acrylic resin and an emulsion resin of a melamine resin were added to the mouth and neck of the molded body. / 0 Z 50% by weight of the blend blended was impregnated.
  • pulp slurry containing 30% by weight of a polyethylene synthetic resin fiber was used. Except for these, a pulp molded article was manufactured in the same manner as in Example 1. Table 1 shows the shapes and dimensions of the threads at the mouth and neck 2 of the obtained molded body.
  • a paper tube (Shofudo Co., Ltd., outer diameter ⁇ 70 mm, number of thread turns 1.25, number of threads 6.23 mm, width of thread 3.5 mm) was used.
  • the measurement was carried out using a tonole gauge (T0HNICHI, MECHANICAL TORQUE METER 2-TM75).
  • the cap used was a Kao Corporation wide-height cap.
  • the torque over the cap was measured by manually tightening the cap.
  • the surface roughness was measured using a surface roughness measuring instrument [Selfcom 120A, Tokyo Seimitsu Co., Ltd.].
  • the surface strength was measured according to JISP 8129. After the wax is fused to the surface of the mouth and neck and allowed to cool, the wax is peeled off from the surface of the mouth and neck, and a wax number (2A to 20A) that does not damage the surface of the mouth and neck is assigned a surface strength. That is what you do. The higher the wax number, the higher the surface strength. However, the surface strength could not be evaluated for a molded article coated with a thermoplastic resin or a molded article impregnated with a large amount of the thermoplastic resin. ⁇ Durometer hardness of mouth and neck>
  • the durometer hardness is a measure of the difficulty of crushing the measurement target site, and here is a measure of the difficulty in reducing the strength of the mouth and neck.
  • Durometer hardness was measured in accordance with JIS K 7215.
  • a rubber hardness tester (GS-809, Shoro A type, manufactured by Teclock Corporation) was used as a testing machine.
  • the hardness calculation formula is as in the following formula (A).
  • h represents the depth of the depression (mm).
  • the molded product is filled with Kao Corporation's powder bleach Wide Height (trade name), and the cap is reduced to approximately 1.47 N'm (15 kgfcm) using a torque gauge. Until sealed. Next, the formed body was turned upside down and shaken up and down 10 times, and the cap was removed by erecting again. The presence or absence of powder on the outer surface of the mouth and neck of the molded product and the threaded portion of the inner surface of the cap was visually determined.
  • a plastic molded body having the same shape and dimensions as in Example 1 was molded.
  • the pulp molded article of Example 1 and this plastic molded article were each screwed with a plastic cap (a Kao Corporation wide height cap) and a torque gauge was used. And tightened with a tightening torque of 2.0 N ⁇ m (20 kgf ⁇ cm).
  • the opening torque was measured.
  • the opening torque of the pulp molded article of Example 1 was 1.96 to 2.45 N-m, and the torque loss was 0.49 to 0.98 N-m (16 to 3 0%).
  • the opening torque of the plastic molded body is 0.98 ⁇ : L.47N'm, and the torque loss is 1.47 ⁇ : 1.966N'm (50 ⁇ 66%).
  • the sealing property with a cap becomes favorable. Further, according to the pulp molded article of the present invention, the durability against repeated opening and closing operations of the cap increases.
  • the shape of the concave portion on the molding surface of the mold is faithfully transferred, and the strength of the screw portion is sufficiently increased.

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

La présente invention concerne un corps moulé (1) en pâte dans lequel une partie vis (5) est formée sur la surface extérieure d'une partie mâchoire (2) et dans lequel un couple de dépassement entre la partie mâchoire (2) et un bouchon mesuré dans un état où le bouchon comportant une partie vis est filetée avec la partie mâchoire (2) représente 1 N.m ou plus.
PCT/JP2001/001465 2000-03-01 2001-02-27 Corps moule en pate WO2001064527A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP01906353A EP1260447B1 (fr) 2000-03-01 2001-02-27 Corps moule en pate
US10/204,859 US7077933B2 (en) 2000-03-01 2001-02-27 Pulp molded body
DE60129006T DE60129006T2 (de) 2000-03-01 2001-02-27 Faserformteil
AU2001234194A AU2001234194A1 (en) 2000-03-01 2001-02-27 Pulp molded body

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-56537 2000-03-01
JP2000056537 2000-03-01

Publications (1)

Publication Number Publication Date
WO2001064527A1 true WO2001064527A1 (fr) 2001-09-07

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EP (1) EP1260447B1 (fr)
AU (1) AU2001234194A1 (fr)
DE (1) DE60129006T2 (fr)
WO (1) WO2001064527A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7503999B2 (en) 2002-11-13 2009-03-17 Kao Corporation Member for producing castings
US7815774B2 (en) 2002-03-13 2010-10-19 Kao Corporation Elements made by paper-making technique for the production of molded articles and production method thereof
US9145224B2 (en) 2009-06-11 2015-09-29 Ellery West Paper container having a reinforced neck

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202017004154U1 (de) * 2017-08-08 2018-11-12 Schwan-Stabilo Cosmetics Gmbh & Co. Kg Kosmetisches Gerät
EP4053030A1 (fr) 2021-03-02 2022-09-07 Aisapack Holding SA Corps tubulaire pour former un emballage et emballage comprenant un tel corps tubulaire
JP2024516590A (ja) 2021-04-26 2024-04-16 アイサパック ホールディング エスエー 包装体および製造プロセス
CA3240431A1 (fr) 2022-03-17 2023-09-21 Gilles Demaurex Emballage recyclable et procede de fabrication
DE102023101649A1 (de) 2023-01-24 2024-07-25 Krones Aktiengesellschaft Verfahren zum Ausformen eines Gewindes in einem Halsbereich eines Fasern umfassenden Behälters, Vorrichtung zum Durchführen des Verfahrens und einteiliger, Fasern umfassender Behälter

Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS558139A (en) * 1978-07-03 1980-01-21 Nippon Columbia Co Ltd Paper-making mesh for speaker cone
JPS6219947U (fr) * 1985-07-18 1987-02-06
JPH05139433A (ja) * 1991-06-07 1993-06-08 Hokkai Can Co Ltd ポリエチレンテレフタレート樹脂製壜体及びその製造方法
JPH08302600A (ja) * 1995-05-11 1996-11-19 Imamura Shoten:Kk シートボトル

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Publication number Priority date Publication date Assignee Title
GB242995A (en) * 1924-11-14 1926-07-22 Baumgaertner Dr Katz & Co G M An improved method of manufacturing closable hollow articles from fibrous pulp
GB452959A (en) * 1935-11-16 1936-09-02 Roy Dresser Heymann Method of and apparatus for moulding pulp articles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS558139A (en) * 1978-07-03 1980-01-21 Nippon Columbia Co Ltd Paper-making mesh for speaker cone
JPS6219947U (fr) * 1985-07-18 1987-02-06
JPH05139433A (ja) * 1991-06-07 1993-06-08 Hokkai Can Co Ltd ポリエチレンテレフタレート樹脂製壜体及びその製造方法
JPH08302600A (ja) * 1995-05-11 1996-11-19 Imamura Shoten:Kk シートボトル

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1260447A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7815774B2 (en) 2002-03-13 2010-10-19 Kao Corporation Elements made by paper-making technique for the production of molded articles and production method thereof
US7503999B2 (en) 2002-11-13 2009-03-17 Kao Corporation Member for producing castings
US9145224B2 (en) 2009-06-11 2015-09-29 Ellery West Paper container having a reinforced neck

Also Published As

Publication number Publication date
DE60129006T2 (de) 2007-10-04
EP1260447A1 (fr) 2002-11-27
AU2001234194A1 (en) 2001-09-12
DE60129006D1 (de) 2007-08-02
EP1260447B1 (fr) 2007-06-20
EP1260447A4 (fr) 2004-08-25

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