WO2020147520A1 - 一种双层容器 - Google Patents

一种双层容器 Download PDF

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Publication number
WO2020147520A1
WO2020147520A1 PCT/CN2019/127574 CN2019127574W WO2020147520A1 WO 2020147520 A1 WO2020147520 A1 WO 2020147520A1 CN 2019127574 W CN2019127574 W CN 2019127574W WO 2020147520 A1 WO2020147520 A1 WO 2020147520A1
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WO
WIPO (PCT)
Prior art keywords
outer layer
layer body
inner container
cup
container
Prior art date
Application number
PCT/CN2019/127574
Other languages
English (en)
French (fr)
Inventor
丁椒平
丁宇凡
Original Assignee
湖北克拉弗特实业有限公司
丁椒平
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 湖北克拉弗特实业有限公司, 丁椒平 filed Critical 湖北克拉弗特实业有限公司
Priority to JP2021539962A priority Critical patent/JP7402237B2/ja
Priority to EP19910844.0A priority patent/EP3925898A4/en
Publication of WO2020147520A1 publication Critical patent/WO2020147520A1/zh

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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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3865—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation drinking cups or like containers
    • B65D81/3874—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation drinking cups or like containers formed of different materials, e.g. laminated or foam filling between walls
    • 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
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/22—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines with double walls; with walls incorporating air-chambers; with walls made of laminated material
    • 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
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/28—Other details of walls
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3865—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation drinking cups or like containers
    • B65D81/3869—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation drinking cups or like containers formed with double walls, i.e. hollow
    • 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
    • B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D2565/38—Packaging materials of special type or form
    • B65D2565/381—Details of packaging materials of special type or form
    • B65D2565/385—Details of packaging materials of special type or form especially suited for or with means facilitating recycling
    • 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
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/26—Opening arrangements or devices incorporated in, or attached to, containers
    • B65D3/261—Opening arrangements or devices incorporated in, or attached to, containers the opening arrangement being located in the container side wall
    • B65D3/264—Opening arrangements or devices incorporated in, or attached to, containers the opening arrangement being located in the container side wall forming a longitudinal line of weakness
    • B65D3/265—Opening arrangements or devices incorporated in, or attached to, containers the opening arrangement being located in the container side wall forming a longitudinal line of weakness and having an attached or applied tearing or reinforcing element

Definitions

  • the invention belongs to the technical field of daily necessities, and relates to a container, particularly a double-layer container.
  • Disposable containers are items that need to be thrown away for one-time use, such as paper cups, paper bowls, plastic cups, and plastic bowls.
  • a paper cup which uses cardboard to form a single-layer cup body through winding and bonding processes, because the cup body made of pure cardboard is easy to soften when exposed to water and cause leakage.
  • the water or beverage in the cup is It cannot be maintained for a long time, and the softened cup body is not easy to pick up. Therefore, disposable paper cups are usually sprayed with a thin waterproof PE film on the side of the paper cup in contact with water and a layer of edible wax is coated on the PE film .
  • a double-layer container that is, the above-mentioned single-layer paper cup is used as the inner cup, and an outer cup is added outside the inner cup. There is an anti-scalding gap between the outer cup and the inner cup. When you hold the outer cup, your hand will not directly touch the inner cup to prevent scalding.
  • This double-layered paper cup has also been used in a large number of applications, and because it is made of paper materials, it is very convenient for recycling.
  • plastic inner cups made of biodegradable plastics have appeared, and the plastic inner cup is sleeved with a plastic inner cup.
  • a paper outer cup with gaps to form a double-layer container of plastic and cardboard Such as the disposable paper-plastic insulated cup (patent number 200920148189.3) and the heat-insulating structure of paper cup (201010566808.8) disclosed in the Chinese patent.
  • the bottom of the outer cup is folded into two layers for reinforcement, so that the lower part of the outer cup cannot form an effective reinforcement structure, so it needs to be strengthened by glue bonding.
  • This double-layer container made of plastic and paper has a major drawback that it is not very environmentally friendly. Although it is a degradable plastic, the degradation time of the degradable plastic takes 2-3 years, and the amount of disposable cups used It is also huge, and random disposal will also cause a great burden on the environment. Therefore, it is necessary to recycle this double-layer container. However, due to consideration of anti-scalding and ease of use of this double-layer container, the connection between the outer cup and the inner cup is very firm, and the connection between the plastic inner cup and the paper outer cup needs to be fixed by glue. Big difficulty: First, because this paper cup is made of different materials, the inner cup and the outer cup must be separated during recycling.
  • the outer cup and the inner cup are firmly bonded by glue, and the outer cup has no place to force the outer cup.
  • the cup is not easily separated from the inner cup; second, the glue adhering to the plastic inner cup is an impurity, but the glue on the plastic inner cup is difficult to remove, and the purification of recycled plastic becomes very difficult.
  • the overall strength of this clamping structure is not high.
  • only the bottom of the outer cup has a two-layer structure for radial reinforcement, and the inner cup is not radially reinforced, and the outer cup When the cup is clamped to the inner cup, there is only one-way clamp connection in the up and down direction.
  • the overall structure strength is not high, and it will be hot when holding hot water and taking it.
  • the present invention proposes a double-layer container.
  • the technical problem to be solved by the present invention is how to make the double-layer container both high in overall strength and fast recovery.
  • a double-layer container comprising an inner container with a bottom made of plastic and an outer layer body made of paper in a cylindrical shape, and the outer layer body is sleeved in the inner container
  • a locking structure is provided between the outer layer body and the inner container to clamp the outer layer body on the outer circumferential surface of the inner container, and the locking structure includes forming on the outer circumferential surface of the inner container and facing the inner container.
  • An annular groove recessed in the radial direction of the container and an annular protrusion formed on the inner circumference of the outer layer in a winding manner, or the locking structure includes an annular protrusion formed on the outer circumference of the inner container and an annular protrusion formed in a winding manner
  • This double-layer container uses a glue-free locking structure to lock the outer layer on the inner container, so that the outer layer is firmly connected to the inner container and is not easy to separate.
  • the outer layer body can be easily broken and torn off by the tearing piece set on the outer layer body, so that the outer layer body can be easily separated from the inner container, and then a plastic inner container without glue impurities is obtained, which realizes rapid recycling .
  • an annular protrusion is formed on the outer layer body, so that the outer layer body is strengthened in the radial direction similar to an arch bridge, especially after the ring is formed, the radial strengthening reaches the maximum, so that the cup is not easily deformed.
  • the formation of the annular groove on the side wall of the inner container also strengthens the inner container in the radial direction.
  • the annular protrusion supports the annular groove of the inner container in the radial direction. Function, the overall strength in the radial direction after connection is further improved. Therefore, through this structure, the overall strength of the outer layer body connected to the inner container can be enhanced.
  • the winding thickness of the annular protrusion or the winding depth of the annular groove can be controlled during production, so that the insulation distance between the inner container and the outer layer body can be adjusted.
  • the annular protrusion is formed by winding, and the cross-sectional width of the annular protrusion is greater than the depth of the annular groove, so that there is a gap between the outer wall of the inner container and the inner wall of the outer layer body .
  • the outer layer at the locking structure also has the ability to prevent scalding, because the outer peripheral part of the cup near the bottom is also the part that is often held, and the enlarged width design can strengthen the anti-deformation ability of the annular curling, and increase The structural strength also increases the heated clamping area.
  • the winding structure of the annular protrusion can form any cross-sectional width, and thus can also adjust the heat insulation gap between the inner cup and the outer cup.
  • the groove cross-sectional shape of the annular groove is arc, square or round, and the convex cross-sectional shape of the annular protrusion is round or ellipse. This shape facilitates good clamping during thermal expansion.
  • the cup mouth of the inner container has an annular rib turned out to the outer wall of the inner container, the outer layer body has no bottom, and the annular rib and bottom of the inner container are both located on the outer layer.
  • the tearing piece is located at the edge of the cup opening of the outer layer body and extends out of the cup opening, and the tearing piece is bent to the outer wall of the outer layer body.
  • the cup mouth of the outer body can be positioned tightly with the upper part of the inner container because the inner diameter of the cup mouth of the outer body is fixed, and the cup body of the inner container is tapered. The closer to the mouth of the inner container, the tighter fit The greater the intensity.
  • the outer layer body can be positioned at both the upper and lower parts.
  • the tear-off sheet can also be fully utilized to make the tear-off sheet tear-damage the outer layer body while enhancing the glue-free fixed connection between the outer layer body and the inner container and increase the strength of the double-layer container. That is, the bottom of the outer layer body is locked to the inner container through the locking structure.
  • the tear piece is set at the cup mouth of the outer layer body and the tear piece is attached to the outer layer body. The outer wall is bent and the part of the tear piece close to the mouth of the cup abuts against the annular rib of the inner container.
  • the tear piece can be bent and deformed outwards.
  • the elastic force acts on the outer layer body, so that the bottom of the outer layer body is pre-tightened by the locking structure of the groove to avoid the movement, because the thin plastic inner container and the paper outer layer body will have greater heat Expansion and contraction will cause the locking structure to loosen, and the pre-tightening force generated by the tearing piece can eliminate these effects, so that the entire outer layer body can be firmly clamped on the inner container without glue, increasing the use strength.
  • the part where the tear piece connects to the cup opening of the outer layer body is the starting part, and the cup body of the outer layer body is provided with a tear line opened from the starting part, and the tear line is formed by The indentations that make the thickness of the cup thinner are formed in intervals.
  • the tear line can extend in any direction on the cup body, and the outer layer body is more easily damaged by the cooperation of the tear line and the tear piece.
  • the ring-shaped rib is formed by winding the cup mouth of the outer layer body outward, and the tear sheet is bent outward and tightly attached to the outer wall of the outer layer body. This structure makes the tear piece easy to tear off.
  • the end of the tear line at the starting part is an indentation, and the indentation extends to the mouth of the outer layer body cup. Since the tear piece is compressed in the annular rib, the inertial force generated during the tearing and this indentation can make it easier to tear off the outer layer along the tear line. As the best effect, the tear line can be along the Set the direction of inertial force, such as vertical downward.
  • the annular rib is formed by folding the mouth of the outer layer body outward into a flat shape, or the annular rib is folded outward by the cup mouth of the outer layer body twice into an L shape
  • the tear-off piece and the cup mouth of the outer layer body are an integral structure, and the arc-shaped part formed when the tear-off piece is bent outwards abuts on the annular rib.
  • the one-piece structure means that the tear-off piece that is connected to the cup mouth is directly cut out during cutting. Such a tear-off piece can maintain better elastic deformation when bending outwards, and the arc-shaped part has the best abutment The elasticity.
  • the end of the tear line at the starting part is an indentation, and the indentation is at a distance from the cup mouth of the outer layer.
  • the setting of the tear line of this structure increases the strength of the cup mouth, so that the tear sheet can have the best elastic effect.
  • This double-layer container can be further improved.
  • the outer layer body is directly made of plastic, and the plastic is made into a plastic board with the same thickness as A4 paper, and then this plastic board is used as an outer paper cup.
  • the same method is used to make double-layer cups, so that they can be recycled during recycling instead of separating paper and plastic.
  • the case can still be:
  • a double-layer container comprising an inner container with a bottom made of plastic and an outer layer body made of plastic.
  • the outer layer body is sleeved outside the inner container, and is characterized in that the outer layer body and the inner container
  • the locking structure includes an annular groove formed on the outer peripheral surface of the inner container and recessed in the radial direction of the inner container and a winding
  • the locking structure includes an annular protrusion formed on the outer circumference of the inner container and an annular protrusion formed on the inner circumference of the outer layer and wound in the radial direction of the outer layer. Into the annular groove, the annular protrusion is embedded in the annular groove.
  • the double-layer container has the following advantages:
  • the overall strength is high.
  • the inner container and the outer layer are strengthened in the radial direction by the annular groove and the annular protrusion, and the annular protrusion is embedded in the annular groove.
  • the support further strengthens the overall strength.
  • the outer layer can be further locked on the inner container by the locking structure, and when holding cold drinks or not in use, the connection is strengthened by the tearing piece.
  • the outer layer body can be easily broken and torn off by the tearing piece set on the outer layer body, so that the outer layer body can be easily separated from the inner container, thereby obtaining a plastic without glue impurities Inner container.
  • the annular groove is formed on the inner container made of plastic material, and the outer part of the paper material is formed into a paper annular protrusion.
  • the plastic and paper The thermal expansion coefficient of the paper is different, the thermal expansion of paper is almost no need to consider, and the thin plastic annular groove will produce a small amount of thermal expansion.
  • the annular protrusion embedded in the annular groove the upper and lower groove walls of the annular groove have a slight thermal expansion
  • the annular protrusion is clamped and locked, which enhances the connection strength and reliability of the double-layer container.
  • Another locking structure that is, a thin annular protrusion formed on the plastic inner container will also generate a small amount of thermal expansion.
  • the annular protrusion is tightly locked in a ring with little thermal expansion based on the annular protrusion being embedded in the annular groove. On the upper and lower walls of the groove.
  • Figures 1-4 are schematic diagrams of different tearing structures of the double-layer container.
  • Fig. 5 is a schematic diagram of the vertical cross-sectional structure of the double-layer container.
  • Fig. 6 is an enlarged view of part A in Fig. 5 and an enlarged schematic view of the structure after thermal expansion.
  • Fig. 7 is an enlarged schematic view of the locking situation where the annular protrusion is larger than the annular groove and the enlarged structure after thermal expansion.
  • FIG 8 and 9 are diagrams showing the positional relationship between the tear line and the tear piece.
  • 10 and 11 are structural schematic diagrams of different annular ribs in the fourth embodiment.
  • Fig. 12 is a schematic diagram of a vertical cross-sectional structure of the double-layer container of the second embodiment.
  • Figure 13 is a vertical cross-sectional structure diagram of the double-layer container of the third embodiment.
  • Inner container 11. Annular rib; 12. Upper and lower groove walls; 2. Outer body; 4. Tear piece; 5. Tear line; 6. Annular groove; 7. Annular protrusion; 8. gap.
  • the double-layer container is a cup-shaped container, in the shape of a truncated cone, including an inner container 1 made of plastic with a bottom and an outer layer body 2 made of paper, and an outer layer body 2 Sleeve outside the inner container 1, the cup mouth of the inner container 1 has an annular rib 11 turned out to the outer wall of the inner container 1, the outer layer body 2 has no bottom and the annular rib 11 and the bottom of the inner container 1 are both located on the outer layer body 2. Outside, between the outer layer body 2 and the inner container 1, there is a locking structure for clamping the outer layer body 2 on the outer peripheral surface of the inner container 1, and a tearing piece is provided on the outer layer body 2 to tear and destroy the outer layer body 2. 4.
  • a tearing line 5 is provided on the cup body below the tearing piece 4 to facilitate the destruction of the outer layer body 2.
  • Adopting a glue-free locking structure can lock the outer layer body 2 on the inner container 1, so that the outer layer body 2 is firmly connected to the inner container 1, and it is not easy to separate. When the double-layer container is used up, it can be recycled. Then through the tear-off piece 4 provided on the outer layer body 2, the outer layer body 2 can be easily broken and torn off, so that the outer layer body 2 can be easily separated from the inner container 1, thereby obtaining the plastic content without glue impurities Device 1, realizes fast recovery.
  • the tearing piece 4 can have a variety of different structures. As shown in FIG. 2, two sets of tearing pieces 4 and tearing lines 5 are provided on the outer layer body 2 of the double-layer container to facilitate the destruction of the outer layer body 2. As shown in FIG. 3, the tearing piece 4 is set on the outer layer body 2 and the tearing line 5 is arranged horizontally and annularly. As shown in FIG. 4, a part of itself is used as the tearing piece 4, that is, the cup body passes through a right angle, etc. The portion formed by the tear line 5 in the shape that is easy to be pinched after being pressed by the fingers serves as the tear piece 4.
  • the locking structure is located at the lower or middle lower part of the double-layer container, and includes an annular groove 6 and an annular protrusion 7.
  • the annular groove 6 is recessed along the radial direction of the inner container 1 to form the outer periphery of the inner container 1.
  • the annular protrusion 7 is formed by winding on the inner peripheral surface of the outer layer body 2.
  • the bottom of the body 2 is wound to the inner peripheral surface. Depending on the process, it can be wound into a circle or an ellipse.
  • the annular protrusion 7 is embedded in the annular groove 6 and the width of the annular protrusion 7 is greater than that of the annular
  • the depth of the groove 6 is such that there is a gap 8 between the outer wall of the inner container 1 and the inner wall of the outer layer body 2.
  • the annular protrusion 7 formed by winding can be adjusted. When an enlarged gap 8 is needed, the outer diameter of the annular protrusion 7 can be increased. In actual production, the gap adjustment becomes easier for the unreasonable use environment.
  • the thin plastic wall deforms due to the full cup of hot drink, forming the right side of Figure 6 In the best state, the complete groove is completely wrapped and attached and clamped on the annular protrusion 7. After many sampling tests and observations, the upper and lower walls are sure to form a clamping lock, which reduces the generation of movement. There are many reasons why it cannot be completely wrapped, and there may be a combined effect on temperature, plastic material, etc.
  • the left side of Figure 7 shows that the width of the annular protrusion 7 is greater than the groove width of the annular groove 6. In this way, the annular protrusion 7 is only partially embedded in the annular groove 6. This structure is not very stable.
  • the container 1 is easily detached from the outer layer 2.
  • the thermal expansion coefficients of plastic and paper are different. The thermal expansion of paper is hardly considered, and the thin plastic annular groove 6 will produce a small amount Thermal expansion causes the thin plastic wall to deform to form the best state as shown on the right side of Figure 7.
  • the annular protrusion 7 is completely embedded in the annular groove 6. After many sampling tests and observations, the upper and lower walls are sure to have more contact surfaces with The annular protrusion 7 contacts and forms a clamping, which reduces the detachment of the outer layer body 2 from the inner container 1.
  • the tear-off piece 4 can be fully utilized so that the tear-off piece 4 has tearing damage to the outer layer body 2 and at the same time can strengthen the outer layer body 2 and the inner container 1 without glue fixed connection, adding this double layer The strength of the container.
  • the tearing piece 4 is located at the edge of the cup opening of the outer layer body 2 and extends out of the cup opening, the annular rib 11 is formed by winding the cup opening of the outer layer body 2 outwards, and the tearing piece 4 is bent outwards And it is closely attached to the outer side wall of the outer layer body 2 so that the part of the tearing sheet 4 close to the cup mouth is against the annular rib 11 of the inner container 1.
  • This structure creates a tight fit between the cup opening of the outer layer body 2 and the annular rib 11, so that the outer layer body 2 is fixed at the upper and lower parts.
  • the part of the cup opening of the outer layer body 2 connected with the tearing piece 4 is the starting part.
  • the cup body of the outer layer body 2 is provided with a tearing line 5 opened from the starting part.
  • the tearing line 5 is made to thin the thickness of the cup body
  • the indentations are arranged at intervals, and the tearing line 5 and the tearing sheet 4 cooperate to make the outer layer body 2 more likely to be destroyed.
  • the end of the tear line 5 at the starting part is an indentation, and the indentation extends to the cup of the outer layer body 2, and the other end of the tear line 5 is along the vertical down. In this way, when the tear sheet 4 is pulled out, the inertia force matches the indentation, and the outer layer body 2 can be easily torn off along the tear line 5.
  • the second embodiment is basically the same as the first embodiment, but the difference lies in the locking structure. As shown in FIG. 12, it includes an annular protrusion 7 formed on the outer circumference of the inner container 1 and an upper and lower groove wall 12 formed on the inner circumference of the outer layer body 2.
  • the annular groove 6, the annular protrusion 7 is embedded in the annular groove 6.
  • the annular protrusion 7 on the inner container 1 is formed by bulging from the inside to the outside, and the annular groove 6 is formed by bending the bottom of the outer layer body 2.
  • the specific process is to first fold the fan-shaped cardboard of the outer layer body 2 along the folding line 13 at the bottom of the outer layer body 2 and attach it to the inner side wall of the outer layer body 2, and then follow the folding line on the folded part 14 Fold two outwardly convex groove walls 12 in the radial direction, and then glue the fan-shaped cardboard to form a cone-shaped outer layer body, forming a ring-shaped protrusion 7 on the inner plastic container 1 in diameter It is strengthened upward.
  • the annular groove 6 formed in the outer layer body 2 is formed by two raised upper and lower groove walls 12. The radial strength of the outer layer body 2 is improved, and the inner container 1 will also generate a small amount of thermal expansion.
  • the third embodiment is basically the same as the second embodiment.
  • the difference lies in the upper and lower groove walls 12 of the annular groove 6, as shown in FIG. 13 and FIG. 9.
  • the specific process is to first place the fan-shaped cardboard of the outer layer body 2 on the outer layer body 2.
  • the bottom is folded along the folding line 13 and attached to the inner side wall of the outer layer body 2, and then an outwardly convex upper groove wall is folded radially along the folding line 14 on the folded part, and then the fan-shaped cardboard is bonded to form Cone-shaped outer layer body, and the double-layer paperboard is wound into the lower groove wall at the folding line 13, that is, the lower groove wall is formed by double-layer paperboard winding.
  • This structure can further strengthen the radial structure of the outer layer body strength.
  • the fourth embodiment is basically the same as the first embodiment.
  • the difference is that the tearing piece 4 is bent and deformed outward to generate elastic force and act on the outer layer body 2, so that the bottom of the outer layer body 2 is pre-tightened by the locking structure of the annular groove 6 Force exists without movement.
  • the tear sheet 4 and the outer layer body 2 are an integral structure, such a tear sheet 4 It can maintain good elastic deformation when bending outwards.
  • the annular rib 11 is formed by folding the cup opening of the outer layer body 2 outward into a flat shape, or as shown in FIG.
  • the annular rib 11 is turned outward from the cup opening of the outer layer body 2. It is folded twice into an L shape, and the arc-shaped part formed when the tearing sheet 4 is bent outwards abuts against the annular rib 11.
  • the end of the tear line 5 of this structure at the starting part is an indentation. The indentation is at a distance from the cup mouth of the outer layer body 2 to increase the strength of the cup mouth, so that the tear piece 4 can have the best elastic effect. .
  • a double-layered cup includes an inner container 1 made of plastic with a bottom and an outer layer body 2 made of plastic.
  • the outer layer body 2 is sleeved outside the inner container 1, and the outer layer body 2 and the content
  • a locking structure for clamping the outer layer body 2 to the outer peripheral surface of the inner container 1 is provided between the containers 1.
  • the plastic used in the outer layer body 2 is a thin plastic plate with a thickness of 0.5mm-2mm. The thin plastic plate is wound and folded to form the outer layer body 2.
  • the locking structure is the same as that of the first embodiment.
  • the locking structure is located in the lower or middle lower part of the double-layer container, and includes an annular groove 6 and an annular protrusion 7.
  • the annular groove 6 is recessed along the radial direction of the inner container 1 to be formed on the outer circumferential surface of the inner container 1, and has upper and lower grooves.
  • the wall 12 is directly formed when the inner container 1 is press-molded. Its cross-sectional shape is arc-shaped.
  • the annular protrusion 7 is formed on the inner peripheral surface of the outer layer body 2, which rolls from the bottom of the outer layer body 2 to the inner peripheral surface. According to different processes, it can be wound into a circle or an ellipse.
  • the annular protrusion 7 is embedded in the annular groove 6 and the width of the annular protrusion 7 is greater than the depth of the annular groove 6, so that the inner container There is a gap 8 between the outer wall of 1 and the inner wall of the outer layer body 2.
  • the locking structure is the same as the embodiment 2.
  • the locking structure includes an annular protrusion 7 formed on the outer peripheral surface of the inner container 1 and an annular groove 6 formed on the inner peripheral surface of the outer layer body 2 with upper and lower groove walls 12 ,
  • the annular protrusion 7 is embedded in the annular groove 6.
  • the annular protrusion 7 on the inner container 1 is formed by bulging from the inside to the outside, and the annular groove 6 is formed by bending the bottom of the outer layer body 2.

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Abstract

一种双层容器，包括由塑料制成的有底部的内容器和由纸质制成呈筒状的外层体，该外层体套接在内容器外，该外层体和内容器之间设有将外层体卡接在内容器外周面上的锁定结构，并且在该外层体上设有能将外层体撕扯破坏的撕扯片。该双层容器通过环形凹槽和环形凸起分别对内容器和外层体在径向上进行了加强，提高了整体强度，通过设置在外层体上的撕扯片实现了快速回收。

Description

一种双层容器 技术领域
本发明属于生活用品技术领域，涉及一种容器，特别是双层容器。
背景技术
一次性容器是一次性使用即需要扔掉的物品，如纸杯、纸碗、塑料杯、塑料碗等。如纸杯，其采用纸板通过卷绕粘接等工艺形成一个单层的杯体，由于纯纸板制成的杯体遇水后很容易变软进而导致外漏，装在杯内的水或者饮料就不能长久保持，并且变软的杯体也不容易拿起，因此一次性纸杯通常在纸杯与水接触的一面喷淋出一层薄薄的防水PE膜以及在PE膜上涂覆一层食用蜡。
为了解决防烫的问题，设计了一种双层容器，即以上述的单层纸杯作为内杯，在内杯的外再增加一个外杯，外杯和内杯之间具有防烫间隙，这样手握住外杯时不会直接接触到内杯达到防烫的目的。这种双层结构的纸杯也已经在大量的应用，且因为都是纸质材料制成，回收利用时都很方便。
近些年，市场上对双层容器的使用耐久性又有进一步要求，因此出现了采用可降解的塑料来制成的塑料内杯，并在塑料内杯外采用套接一个与塑料内杯具有间隙的纸质外杯，从而形成塑料和纸板组合的双层容器。如中国专利公开的一次性纸塑保温杯(专利号为200920148189.3)和纸杯之隔热结构(201010566808.8)。并且这种结构的双层容器，其外杯的底部是折叠成两层的结构进行加强，导致外杯下部不能形成有效的强化结构，因此需要通过胶水粘接形成强化，若不使用胶水粘接，在杯身的径向上容易变形，在拿起外杯时，外杯受压变形后会接触到内杯，而且内杯没有强化结构，内杯在受热时也容易变形，导致整体强度也不高，在盛装热水并拿取时容易烫手。
这种塑料和纸质形成的双层容器有一个很大缺陷就是对环境不是很友好，虽然是可降解塑料，但是可降解塑料的降解时间需要2-3年时间，并且一次性杯子的使用量也是巨大的，随意丢弃也会对环境造成很大的负担。所以对这种双层容器的回收利用是很有必要的。但是这种双层容器因为考虑防烫和使用方便性，外杯和内杯连接都是很牢固的，塑料内杯与纸质外杯的连接需要胶水进行固定，这样就会在回收是产生较大的困难：一是这种纸杯由于是不同的材质，在回收时必须是将内杯和外杯分开，但是外杯与内杯通过胶水粘接很牢固，并外杯无处受力使外杯不容易从内杯上分离开来；二是粘附在塑料内杯的胶水是杂质，但是胶水在塑料内杯上是难以去除，回收塑料的提纯变得非常困难。
塑料内杯和纸质外杯除了两者直接采用胶水粘接外，还有人公开内杯和外杯采用卡接结构的固定方式，将卡接结构应用到塑料内杯和纸质外杯进行连接，如美国专利公开的一种双层容器(公开号是US2015/0048086A1)，其锁定结构是采用外杯内侧壁形成台阶，内杯的底部放置在台阶上，外杯杯口边缘插入到内杯卷口内，可见，这种卡接结构的结构强度不高，特别是内杯很容易从外杯中脱出来，因此也需要胶水粘接才能使内杯不容易从外杯中脱离。并且这种卡接结构的整体强度也不高，如上述所提到的，只有在外杯底部有折叠成两层的结构进行径向上的加强，而且内杯并没与径向的加强，而且外杯跟内杯卡接时只有上下方向的单方向卡接，整体结构强度不高，也会在盛装热水并拿取时容易烫手。
因此，一种有足够的整体强度好又便于回收利用的双层容器被市场所期待。
发明内容
本发明针对现有的技术存在上述问题，提出了一种双层容器，本发明所要解决的技术问题是如何使双层容器既整体强度高又能快速回收。
本发明通过下列技术方案来实现：一种双层容器，包括由塑料制成 的有底部的内容器和由纸质制成呈筒状的外层体，所述外层体套接在内容器外，其特征在于，所述外层体和内容器之间设有将外层体卡接在内容器外周面上的锁定结构，所述的锁定结构包括形成在内容器外周面上并向内容器径向方向凹入的环形凹槽和以卷绕方式形成在外层体内周面的环形凸起，或者所述的锁定结构包括形成在内容器外周面上的环形凸起和以卷绕方式形成在外层体内周面并向外层体径向方向凹入的环形凹槽，所述的环形凸起嵌入在环形凹槽内，并且在所述的外层体上设有能将外层体撕扯破坏的撕扯片。
本双层容器采用无胶水的锁定结构将外层体锁定在内容器上，这样外层体就牢固的连接在内容器上，不容易分离，在用完本双层容器后进行回收时，然后通过设置在外层体上的撕扯片，就能将外层体轻易的破坏撕扯掉，使外层体能够很容易得从内容器上分开，进而得到无胶水杂质的塑料内容器，实现了快速回收。并且外层体上形成了环形凸起，使得外层体在径向方向上形成如同拱桥类似的加强，特别是形成环形后，径向上的加强达到最大，使得杯子不容易变形，在此基础上，内容器在侧壁上形成环形凹槽也使得内容器在径向上得到了加强，并且环形凸起嵌入到环形凹槽内后，环形凸起对内容器的环形凹槽在径向上起到了支撑作用，使得连接后在径向上的整体强度进一步提高了。因此，通过这种结构能增强外层体连接在内容器的整体强度。同时制作时能够对环形凸起的卷绕厚度或者环形凹槽的卷绕深度进行控制，从而可以调节内容器与外层体的隔热间距。
在上述的双层容器中，所述的环形凸起由卷绕形成，环形凸起的横截面宽度大于所述环形凹槽的深度，使得内容器的外壁与外层体的内壁之间具有间隙。通过这种结构使得在锁定结构处的外层体也有防烫的能力，因为杯子靠近底部的外周部分也是经常握持的部分，而且加大的宽度设计能够加强环形卷边的抗变形能力，增加结构强度，而且也增加了受热夹持的面积。环形凸起的卷绕结构能够形成任意的横截面宽度，而从也能调节内杯与外杯之间的隔热间隙。
在上述的双层容器中，所述的环形凹槽的凹槽截面形状为弧形、方形或者圆形，所述的环形凸起的凸起截面形状为圆形或者椭圆形。这种形状便于热膨胀时很好的夹持。
在上述的双层容器中，所述内容器的杯口具有向内容器外壁翻出的环形挡边，所述的外层体无底部且所述内容器的环形挡边和底部均位于外层体外，所述撕扯片位于外层体的杯口边缘并延伸出杯口，所述的撕扯片向外层体的外壁弯折。外层体杯口可以通过紧配合的方式与内容器上部进行定位，因为外层体杯口的内径是固定的，而内容器的杯身是锥形，越靠近内容器的杯口，紧配合的强度越大。通过这种固定方式可以使外层体在上部和下部都能够定位。
在实现快速回收的基础上，还可以将撕扯片进行了充分的利用使撕扯片具有撕扯破坏外层体同时能增强外层体和内容器无胶水固定连接，增加本双层容器的强度。即外层体底部通过锁定结构将外层体底部锁接在内容器上，在外层体下部限位的基础上，将撕扯片设置在外层体的杯口处并将撕扯片向外层体的外壁弯折并且撕扯片靠近杯口的部分抵靠在内容器的环形挡边上，根据环形挡边的不同结构，比如平板挡边或者L形挡边，可以使撕扯片向外弯曲变形而产生弹性力并作用在外层体上，使外层体的底部通过凹槽卡接的锁定结构有预紧力存在而避免发生窜动，因为薄的塑料内容器和纸质外层体会存在较大热胀冷缩从而导致锁定结构会松动，而撕扯片产生这些预紧力能够消除这些影响，从而使整个外层体能够在无胶水的情况下牢固的卡接在内容器上，增加使用强度。
在上述的双层容器中，所述的撕扯片连接外层体杯口部分为起始部，在所述外层体的杯身上设置从起始部开设的撕扯线，所述的撕扯线由使杯身厚度变薄的压痕间隔排列形成。撕扯线可以在杯身上向任何方向延伸，通过撕扯线和撕扯片配合，使得外层体更容易得破坏掉。
在上述的双层容器中，所述的环形挡边由外层体的杯口向外卷绕而成，所述的撕扯片向外弯折并紧贴在外层体外侧壁上。这种结构使得撕扯片容易扯下。
在上述的双层容器中，所述撕扯线位于起始部处的一端为一段压痕，且该压痕延伸至外层体杯口。由于撕扯片在压紧在环形挡边内，在进行撕扯时产生的惯性力配合这段压痕可以较为容易的外层体沿着撕扯线撕下，作为最佳的效果，撕扯线可以沿着惯性力方向设置，比如竖直向下。
在上述的双层容器中，所述环形挡边由外层体的杯口向外翻折成平面状而成，或者环形挡边由外层体的杯口向外翻折两次成L状而成，所述的撕扯片与外层体杯口是一体式结构，且撕扯片向外弯折时形成的弧形部分抵靠的在环形挡边上。一体式结构是指在进行裁剪时直接裁剪出与杯口连为一体的撕扯片，这样的撕扯片在向外弯折时能保持较好的弹性变形，而弧形部分的抵靠有最佳的弹性力。
在上述的双层容器中，所述撕扯线位于起始部处的一端为一段压痕，该段压痕距离外层体杯口一段距离。这种结构的撕扯线设置使得杯口的强度提高，使得撕扯片能有最佳的弹性效果。
这种双层容器还可以进一步的改进，将外层体直接有塑料制成，将塑料制成如同A4纸张一样的厚度的塑料板，然后将这种塑料板当做外纸杯来使用，采用如上述相同的方法制成双层杯子，这样，在回收时就可以回收，不用在进行纸塑分离。本案还是可以是：
一种双层容器，包括由塑料制成的有底部的内容器和由塑料成的外层体，所述外层体套接在内容器外，其特征在于，所述外层体和内容器之间设有将外层体卡接在内容器外周面上的锁定结构，所述的锁定结构包括形成在内容器外周面上并向内容器径向方向凹入的环形凹槽和以卷绕方式形成在外层体内周面的环形凸起，或者所述的锁定结构包括形成在内容器外周面上的环形凸起和形成在外层体内周面并向外层体径向方向以卷绕方式凹入的环形凹槽，所述的环形凸起嵌入在环形凹槽内。
与现有技术相比，本双层容器具有以下优点：
1、整体强度高，通过环形凹槽和环形凸起分别对内容器和外层体在径向上进行了强度的强化并且在环形凸起嵌入到环形凹槽 内是环形凸起对环形凹槽产生支撑进一步强化了整体强度。
2、盛装热饮时能够通过锁定结构将外层体进一步锁定在内容器上，而盛装冷饮或者不使用时则由撕扯片加强了连接。
3、能够方便快速回收，通过设置在外层体上的撕扯片，就能将外层体轻易的破坏撕扯掉，使外层体能够很容易得从内容器上分开，进而得到无胶水杂质的塑料内容器。
4、环形凹槽形成在塑料材质制成的内容器上，而纸质材料的外本成形成了纸质的环形凸起，在使用本双层容器盛装高温度的饮品时，塑料和纸质的热膨胀系数不同，纸质的热膨胀几乎不用考虑，而薄的塑料材质的环形凹槽会产生少量热膨胀，在环形凸起嵌入在环形凹槽内的基础上环形凹槽的上下槽壁的微量热膨胀进一步会将环形凸起夹持锁定住，增强了双层容器的连接强度和使用可靠性。而另一种锁定结构，即形成在塑料内容器上薄的环形凸起也会产生少量热膨胀，在环形凸起嵌入在环形凹槽内的基础上环形凸起涨紧锁定在热膨胀很小的环形凹槽的上下槽壁上。
附图说明
图1-4是本双层容器的不同撕扯结构的示意图。
图5是本双层容器的竖向的截面结构示意图。
图6是图5中A部分放大图以及受热膨胀后的放大结构示意图。
图7是环形凸起大于环形凹槽的锁定情况以及受热膨胀后的放大结构示意图。
图8和图9是撕扯线与撕扯片的位置关系图。
图10和11是实施例四中不同环形挡边的结构示意图。
图12是实施例二的双层容器的竖向的截面结构示意图。
图13是实施例三的双层容器的竖向的截面结构示意图。
图14和图15是实施例五的双层杯的结构示意图。
图中，1、内容器；11、环形挡边；12、上下槽壁；2、外层体；4、撕扯片；5、撕扯线；6、环形凹槽；7、环形凸起；8、间隙。
具体实施方式
以下是本发明的具体实施例，并结合附图对本发明的技术方案作进一步的描述，但本发明并不限于这些实施例。
实施例一：
如图1所示，本双层容器是一种杯状容器，呈圆台状，包括由由塑料制成的有底部的内容器1和由纸质制成的外层体2，外层体2套接在内容器1外，内容器1的杯口具有向内容器1外壁翻出的环形挡边11，外层体2无底部且内容器1的环形挡边11和底部均位于外层体2外，外层体2和内容器1之间设有将外层体2卡接在内容器1外周面上的锁定结构，在外层体2上设有将外层体2撕扯破坏的撕扯片4，在撕扯片4的下方的杯身上设有撕扯线5方便破坏外层体2。采用无胶水的锁定结构能将外层体2锁定在内容器1上，这样外层体2就牢固的连接在内容器1上，不容易分离，在用完本双层容器后进行回收时，然后通过设置在外层体2上的撕扯片4，就能将外层体2轻易的破坏撕扯掉，使外层体2能够很容易得从内容器1上分开，进而得到无胶水杂质的塑料内容器1，实现了快速回收。
撕扯片4可以是有多种变化结构，如图2所示，双层容器的外层体2上设置两组撕扯片4和撕扯线5，便于方便破坏外层体2。再如图3所示，将撕扯片4设置在外层体2的本身上并横向环形设置撕扯线5，还有如图4所示，将本身的一部分作为撕扯片4，即由杯身上通过直角等形状的撕扯线5形成的易于手指压入后捏住的部分作为撕扯片4。
如图5所示，锁定结构位于双层容器的下部或者中下部，包括环形凹槽6和环形凸起7，环形凹槽6沿着内容器1的径向凹入从而形成在内容器1外周面上，具有上下槽壁12，是在内容器1压制成型时直接形成的，其截面的形状为弧形，环形凸起7由卷绕形成在外层体2内周面 上，是由外层体2的底部向内周面卷绕而成，根据工艺不同的，可以卷绕成圆形或者椭圆形，环形凸起7嵌入在环形凹槽6内并且环形凸起7的宽度大于所述环形凹槽6的深度，使得内容器1的外壁与外层体2的内壁之间具有间隙8。为保证锁定结构处有足够的间隙8，内容器1的靠近底部的部分向内收缩，使该间隙8增大。通过卷绕形成的环形凸起7可以进行调节，当需要扩大的间隙8时可以将环形凸起7的外径增加，在实际生产中针对不通的使用环境使间隙调节变得更加容易。
如图6所示，锁定结构在初始套接装配时由于配合尺寸的误差，环形凸起7并不能完全的卡接在环形凹槽6内，图6左侧是环形凹槽6的槽宽大于环形凸起7的宽度，这样，环形凸起7和环形凹槽6的配合是间隙配合，这种间隙配合会使外壳产生窜动的情况，但是在内部盛装高温度的饮品时，塑料和纸质的热膨胀系数不同，纸质的热膨胀几乎不用考虑，而薄的塑料材质的环形凹槽6会产生少量热膨胀，再加上满杯热饮的使塑料薄壁变形而形成如图6的右侧的最佳状态，完全凹槽完全包裹贴合并夹紧在环形凸起7上，经过多次抽样试验和观测，上下壁确定能形成夹持锁定，减少了窜动的产生。不能完全包裹原因很多，可能温度、塑料材质等方面有联合影响。
如图7所示，图7左侧是环形凸起7的宽度大于环形凹槽6的槽宽，这样，环形凸起7只有部分嵌入在环形凹槽6中，这种结构不是十分稳定，内容器1容易从外层体2中脱出，在内部盛装高温度的饮品时，塑料和纸质的热膨胀系数不同，纸质的热膨胀几乎不用考虑，而薄的塑料材质的环形凹槽6会产生少量热膨胀，使塑料薄壁变形而形成如图7的右侧的最佳状态，环形凸起7完全嵌入到环形凹槽6内，经过多次抽样试验和观测，上下壁确定能更多接触面与环形凸起7接触并形成夹持，减少了外层体2从内容器1脱离的情况。
对不使用和盛放冷饮的情况，可以将撕扯片4进行充分的利用使撕扯片4具有撕扯破坏外层体2同时能增强外层体2和内容器1无胶水固定连接，增加本双层容器的强度。如图5所示，撕扯片4位于外层体2 的杯口边缘并延伸出杯口，环形挡边11由外层体2的杯口向外卷绕而成，撕扯片4向外弯折并紧贴在外层体2外侧壁上，使撕扯片4靠近杯口的部分抵靠在内容器1的环形挡边11上。这种结构使得外层体2的杯口与环形挡边11之间产生了紧配合，使得外层体2在上部和下部都有固定。
如图1所示，撕扯片4连接外层体2杯口部分为起始部，在外层体2的杯身上设置从起始部开设的撕扯线5，撕扯线5由使杯身厚度变薄的压痕间隔排列形成，通过撕扯线5和撕扯片4配合，使得外层体2更容易得破坏掉。如图8所示的外层体2展开图，撕扯线5位于起始部处的一端为一段压痕，且该压痕延伸至外层体2杯口，撕扯线5另一端沿着竖直向下。这样在拉出撕扯片4时由惯性力配合这段压痕可以较为容易的外层体2沿着撕扯线5撕下。
实施例二：
实施例二基本与实施例一相同，不同点在于锁定结构，如图12所示，包括形成在内容器1外周面上的环形凸起7和形成在外层体2内周面具有上下槽壁12的环形凹槽6，环形凸起7嵌入在环形凹槽6内。内容器1上的环形凸起7由内侧向外侧凸起形成，环形凹槽6由外层体2底部弯折形成。结合如图8所示，其具体过程是先将外层体2的扇形纸板在外层体2底部沿翻折线13翻折并与外层体2内侧壁贴合，再在翻折部分上沿折线14向径向折叠出两个向外凸起的凹槽壁12，之后再将扇形纸板粘接形成锥状的外层体，形成在塑料内容器1上环形凸起7对内容器1在径向上形成加强，在外层体2形成环形凹槽6是两个凸起的上下槽壁12形成，外层体2在径向强度得到提高，并且内容器1也会产生少量热膨胀，在环形凸起7嵌入在环形凹槽6内的基础上环形凸起7涨紧锁定在热膨胀很小的环形凹槽6的上下槽壁12上，使得外层体2和内容器1的在径向上的整体强度得到加强。
实施例三
实施例三基本与实施例二相同，不同点在于该环形凹槽6的上下槽壁12，结合图13和图9所示，其具体过程是先将外层体2的扇形纸板在外层体2底部沿翻折线13翻折并与外层体2内侧壁贴合，再在翻折部分上沿折线14向径向折叠出一个向外凸起的上槽壁，之后再将扇形纸板粘接形成锥状的外层体，并在翻折线13处将双层的纸板卷绕成下槽壁，即下槽壁为双层纸板卷绕形成，这种结构能进一步加强外层体的径向结构强度。
实施例四：
实施例四基本与实施例一相同，不同点在撕扯片4向外弯曲变形而产生弹性力并作用在外层体2上，使外层体2的底部通过环形凹槽6的锁定结构有预紧力存在而不会发生窜动。如图9所示，按图9裁剪出外层体2的展开图状态，然后通过卷绕并粘接形成外层体2时，撕扯片4与外层体2为一体式结构，这样的撕扯片4在向外弯折时能保持较好的弹性变形。如图10所示，环形挡边11由外层体2的杯口向外翻折成平面状而成，或者如图11所示，环形挡边11由外层体2的杯口向外翻折两次成L状而成，在撕扯片4向外弯折时形成的弧形部分抵靠的在环形挡边11上。这种结构的撕扯线5位于起始部处的一端为一段压痕，该段压痕距离外层体2杯口一段距离使得杯口的强度提高，让撕扯片4能有最佳的弹性效果。
实施例五：
如图14，一种双层杯，包括由塑料制成的有底部的内容器1和由塑料成的外层体2，外层体2套接在内容器1外，外层体2和内容器1之间设有将外层体2卡接在内容器1外周面上的锁定结构。外层体2所使用的塑料是一种薄片塑料板，厚度是0.5mm-2mm之间，这种薄片塑料板卷绕折叠制成外层体2，锁定结构与实施例1的锁定结构相同，锁定结构位于双层容器的下部或者中下部，包括环形凹槽6和环形凸起7，环 形凹槽6沿着内容器1的径向凹入从而形成在内容器1外周面上，具有上下槽壁12，是在内容器1压制成型时直接形成的，其截面的形状为弧形，环形凸起7形成在外层体2内周面上，其由外层体2的底部向内周面卷绕而成，根据工艺不同的，可以卷绕成圆形或者椭圆形，环形凸起7嵌入在环形凹槽6内并且环形凸起7的宽度大于所述环形凹槽6的深度，使得内容器1的外壁与外层体2的内壁之间具有间隙8。或者锁定结构与实施例2相同，如图15所示，锁定结构包括形成在内容器1外周面上的环形凸起7和形成在外层体2内周面具有上下槽壁12的环形凹槽6，环形凸起7嵌入在环形凹槽6内。内容器1上的环形凸起7由内侧向外侧凸起形成，环形凹槽6由外层体2底部弯折形成。
本文中所描述的具体实施例仅仅是对本发明作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的范围或者超越所附权利要求书所定义的范围。

Claims (10)

  1. 一种双层容器，包括由塑料制成的有底部的内容器(1)和由纸质制成呈筒状的外层体(2)，所述外层体(2)套接在内容器(1)外，其特征在于，所述外层体(2)和内容器(1)之间设有将外层体(2)卡接在内容器(1)外周面上的锁定结构，所述的锁定结构包括形成在内容器(1)外周面上并向内容器径向方向凹入的环形凹槽(6)和以卷绕方式形成在外层体(2)内周面的环形凸起(7)，或者所述的锁定结构包括形成在内容器(1)外周面上的环形凸起(7)和形成在外层体(2)内周面并向外层体径向方向以卷绕方式凹入的环形凹槽(6)，所述的环形凸起(7)嵌入在环形凹槽(6)内，并且在所述的外层体(2)上设有能将外层体(2)撕扯破坏的撕扯片(4)。
  2. 根据权利要求1所述的双层容器，其特征在于，所述的环形凸起(7)由卷绕形成，环形凸起(7)的横截面宽度大于所述环形凹槽(6)的深度，使得内容器(1)的外壁与外层体(2)的内壁之间具有间隙(8)。
  3. 根据权利要求1或2所述的双层容器，其特征在于，所述的环形凹槽(6)的凹槽截面形状为弧形、方形或者圆形，所述的环形凸起(7)的凸起截面形状为圆形或者椭圆形。
  4. 根据权利要求1或2所述的双层容器，其特征在于，所述内容器(1)的杯口具有向内容器(1)外壁翻出的环形挡边(11)，所述的外层体(2)无底部且所述内容器(1)的环形挡边(11)和底部均露出外层体(2)外，所述撕扯片(4)位于外层体(2)的杯口边缘并延伸出杯口，所述的撕扯片(4)向外层体(2)的外壁弯折。
  5. 根据权利要求4所述的双层容器，其特征在于，所述的撕扯片(4)连接外层体(2)杯口部分为起始部，在所述外层体(2)的杯身上设置从起始部开设的撕扯线(5)，所述的撕扯线(5)由使杯身厚度变薄的压痕间隔排列形成。
  6. 根据权利要求4所述的双层容器，其特征在于，所述的环形挡边(11)由外层体(2)的杯口向外卷绕而成，所述的撕扯片(4)向外弯折并紧贴在外层体(2)外侧壁上。
  7. 根据权利要求5所述的双层容器，其特征在于，所述撕扯线(5)位于起始部处的一端为一段压痕，且该压痕延伸至外层体(2)杯口。
  8. 根据权利要求4所述的双层容器，其特征在于，所述环形挡边(11)由外层体(2)的杯口向外翻折成平面状而成，或者环形挡边(11)由外层体(2)的杯口向外翻折两次成L状而成，所述的撕扯片(4)与外层体(2)杯口是一体式结构，且撕扯片(4)向外弯折时形成的弧形部分抵靠的在环形挡边(11)上。
  9. 根据权利要求5所述的双层容器，其特征在于，所述撕扯线(5)位于起始部处的一端为一段压痕，该段压痕距离外层体(2)杯口一段距离。
  10. 一种双层容器，包括由塑料制成的有底部的内容器(1)和由塑料成呈筒状的外层体(2)，所述外层体(2)套接在内容器(1)外，其特征在于，所述外层体(2)和内容器(1)之间设有将外层体(2)卡接在内容器(1)外周面上的锁定结构，所述的锁定结构包括形成在内容器(1)外周面上并向内容器径向方向凹入的环形凹槽(6)和以卷绕方式形成在外层体(2)内周面的环形凸起(7)，或者所述的锁定结构包括形成在内容器(1)外周面上的环形凸起(7)和形成在外层体(2)内周面并向外层体径向方向以卷绕方式凹入的环形凹槽(6)，所述的环形凸起(7)嵌入在环形凹槽(6)内。
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US20200231363A1 (en) 2020-07-23
EP3925898A4 (en) 2022-11-23
TW202028066A (zh) 2020-08-01
TWI714428B (zh) 2020-12-21
US11203481B2 (en) 2021-12-21

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