CN111850352A - Metal layer, paper pot and manufacturing method thereof - Google Patents
Metal layer, paper pot and manufacturing method thereof Download PDFInfo
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- CN111850352A CN111850352A CN202010674073.4A CN202010674073A CN111850352A CN 111850352 A CN111850352 A CN 111850352A CN 202010674073 A CN202010674073 A CN 202010674073A CN 111850352 A CN111850352 A CN 111850352A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
- A47J36/04—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay the materials being non-metallic
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- Food Science & Technology (AREA)
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- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
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Abstract
The invention provides a metal layer, which is suitable for a paper pot and comprises Al: 80% -89%, Fe: 0.4 to 0.7 percent. The invention also provides a paper pot made of the metal layer and a manufacturing method thereof. The metal layer provided by the invention has good flexibility, ductility, strength, forming performance and heat conducting performance, and the paper pot made of the metal layer is simple and rapid to use, convenient to carry and good in flexibility and heat conducting performance.
Description
Technical Field
The invention relates to the technical field of food packaging and material processing, in particular to a metal layer, a paper pot containing the metal layer and a manufacturing method of the paper pot.
Background
With the development of society, the living standard of people is continuously improved, the pace of life is continuously accelerated, and the requirements of people on instant cooking food are more and more popularized in order to meet the requirements of activities such as going out, outing, picnic and the like and also meet the requirements of rapid pace of life. The disposable paper container capable of cooking food can be transported at any time and any place, but the cooking containers are all pre-processed and formed, have certain volume, occupy certain space in the carrying and transporting process, and cause inconvenience in carrying and transporting. In addition, although the paper of the current paper container is provided with the metal layer, the metal layer has poor forming performance due to insufficient ductility, flexibility and strength, and the paper pot made by punching the metal layer is prone to leakage due to damage of the paper in the using process. If the food in the paper container is heated, the heating and cooking speed is slow and the heating effect is not ideal due to the poor heat-conducting property of the metal layer. Therefore, there is a need for a cooking vessel that can be used in a composite layer of a paper pot and has a metal layer with good formability and heat conductivity, and is simple and fast to use, convenient to carry, and good in flexibility, strength and heat conductivity.
Disclosure of Invention
The invention aims to provide a paper pot which is used in a paper pot composite layer and has a metal layer with good forming and heat conducting properties and good heat conducting properties, and a manufacturing method thereof. The technical scheme is as follows.
In one aspect of the present invention, a metal layer suitable for use in a paper pot includes, by mass, Al: 80% -89%, Fe: 0.4 to 0.7 percent.
Further, the metal layer further comprises, in mass percent: c: 9.5% -17.5%, O: 0.7% -2.8%, Cu: 0.2% -0.3%, Si: 0.04 to 0.06 percent.
Further, the metal layer comprises, in mass percent, Al: 82.5% -89%, C: 9.6% -13.5%, O: 1.9% -2.75%, Fe: 0.4 to 0.52 percent.
Further, the metal layer comprises, in mass percent, Al: 80% -87%, C: 11.9% -17.5%, O: 0.7% -1.35%, Fe: 0.5% -0.7%, Cu: 0.2% -0.3, Si: 0.04-0.06 percent.
Further, the thickness of the metal layer is 0.0001-0.001 mm.
In another aspect of the invention, a paper pot is provided, comprising a bottom; a sidewall connected to the bottom; the bottom and/or the side wall comprises a resin layer, a paper layer and a metal layer as described in any of the above; the two side surfaces of the metal layer are respectively connected with the resin layer and the paper layer;
The side wall comprises a folded portion and a side portion; the folded portion is connected with the side portion; adjoining the adjacent both side portions by folding of the folded portion; the bottom, side and folded portion in the unfolded state may be in the same plane.
Furthermore, a folding structure is arranged on the folding part, wherein the folding part comprises a first inward folding surface, a first outward folding surface, a second inward folding surface and a second outward folding surface; the first inward-folded surface is connected with the second inward-folded surface, and the first outward-folded surface or the second outward-folded surface is connected with the outer side of the side part; or the first outer folding surface is connected with the second outer folding surface, and the first inner folding surface or the second inner folding surface is connected with the inner side of the side part.
Further, the fold and the side portions form an angle a, an angle B, an angle C, an angle a, an angle B, an angle d; wherein said angle A is 30 °, said angle B is 75 °, said angle C is 105 °; or, the angle a is 45 °, the angle B is 45 °, and the angle C is 90 °; the angle a of the two upper sidelines of the folding part is less than or equal to the angles b and d of the upper sidelines of the folding part and the upper sidelines of the side part; the angle a is an obtuse angle.
In another aspect of the present invention, there is also provided a paper pot including: a bottom wall; and a side wall connected to the bottom wall; the side wall comprises a side part, a transition part and a folding part, and the upper edge of the side part, the upper edge of the transition part and the upper edge of the folding part are bent in the same direction to form a fixing part.
Further, the fold comprises a first fold and a second fold connected to each other;
the first folding structure comprises a folding wing connected between the transition part and the side part, and a first crease arranged at the connection part of the transition part and the folding wing;
the second folding structure comprises a second fold disposed between the folding wing and the side portion;
the inner surface of the folding wing is connected with the inner surface of the transition part, and the outer surface of the folding wing is connected with the outer surface of the side part; or the inner surface of the folding wing is connected with the inner surface of the side part, and the outer surface of the folding wing is connected with the outer surface of the transition part.
Further, a third crease is arranged between the bottom wall and the side part, and a fourth crease is arranged between the bottom wall and the transition part;
the third crease is linear; the fourth crease is connected with the third crease and is in a convex arc shape; the transition part is an arc-shaped wall matched with the fourth fold.
The invention also provides a manufacturing method of the paper pot, which comprises the following steps,
providing the metal layer, the resin layer and the paper layer;
Sequentially compounding the resin layer, the metal layer and the paper layer to form a composite layer;
cutting the composite layer;
stamping the cut composite layer to form a paper pot;
the metal layer is the metal layer.
Further, the sequentially compounding the resin layer, the metal layer and the paper layer to form a compound layer includes:
and sequentially pressing or bonding the resin layer, the metal layer and the paper layer to form a composite layer.
According to the metal layer provided by the invention, the appropriate content of Al, C, O, Fe, Cu, Si and other elements is added, so that the number and the crystal grain size of intermetallic compounds in the metal layer can be optimized, and the tensile strength of the metal layer at different angles can be improved, so that the ductility, the flexibility and the strength of the metal layer are greatly improved, the stamping forming performance of the metal layer can be greatly improved, and the metal layer can be prevented from being easily cracked in the stamping forming process. In addition, metal elements such as Al, Fe, Cu and the like with proper content are added into the metal layer, so that the heat-conducting property of the metal layer can be improved. The invention provides a paper pot which is composed of a bottom stamped by a composite layer compounded by a metal layer, a resin layer and a paper layer and a side wall connected with the bottom, wherein the side wall comprises side parts and a folding part connected between the side parts, when in use, the adjacent two side parts can be connected into the paper pot composed of the bottom and the side wall by folding the folding part, the use is very convenient and fast, and simultaneously, when not in use, the bottom, the side parts and the folding part can be positioned on the same plane by unfolding the folding part, so that the paper pot can be carried in batch and is very convenient to carry. In addition, the metal layer of the composite layer for manufacturing the paper pot has good strength, toughness and formability, so that the paper pot provided by the invention has higher use strength, and the paper pot formed by stamping is not easy to crack and leak. Meanwhile, the metal layer in the composite layer of the paper pot provided by the invention has good heat conductivity, so that the heat conductivity is good when food in the paper pot is heated, and the purposes of energy conservation and high efficiency can be achieved.
Drawings
FIG. 1 is a front view of a semi-expanded paper pot according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a folded and formed paper pan according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a fully-unfolded paper pot according to an embodiment of the present invention;
FIG. 4 is a side view of a paper pot in a semi-expanded state according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of another paper pot according to an embodiment of the present invention;
fig. 6 is a schematic structural view of another paper pot according to the embodiment of the present invention after being folded.
Detailed Description
The metal layer provided by the embodiment of the invention comprises the following components in percentage by mass: 80% -89%, Fe: 0.4 to 0.7 percent. The metal layer, the resin layer and the paper layer form a composite layer together, and the composite layer is used for manufacturing a paper pot, the paper pot is used for being matched with an induction cooker, or the paper pot is used for being matched with equipment which can generate electromagnetic waves to generate heat by a heating principle of magnetic field induced current (also called eddy current). When a composite layer including the metal layer, the resin layer, and the paper layer is formed by press forming a paper pot, a high wrinkle pressure is generally applied to suppress generation of flange wrinkles. When a high wrinkle pressure is applied, a high frictional force is generated on both sides of the die and the material of the paper pot, and the press forming load is increased. Therefore, in order to enable deeper forming in the press forming of the paper pot, it is necessary to improve the ductility, flexibility and strength of the paper pot material so as to be adaptable to the press forming of the paper pot. The metal layer provided by the embodiment of the invention plays a key role in ductility, flexibility and strength of the paper pot in the composite layer of the paper pot. By setting the composition of the metal layer within the range of the present invention, the number of intermetallic compounds and the crystal grain size in the metal layer can be optimized, and the formability of the paper for a pot can be greatly improved.
Fe is a metal having a high heat conductivity, and can generate heat by a heating principle of a magnetic field induced current (also referred to as eddy current), and when the content of Fe is less than 0.4%, the content of Fe that can generate heat in the metal layer by the heating principle of the magnetic field induced current is too small, resulting in a low heat generation effect, but when the content of Fe exceeds 0.7%, an intermetallic compound having a circle equivalent diameter of 1.0 to 5.0 μm, which becomes a recrystallization nucleation point, can be increased by Fe, so that a huge intermetallic compound is easily formed when the metal layer is manufactured, and thus cracks are easily generated in the forming process of the metal layer, thereby reducing the formability of the metal layer. Therefore, as an embodiment of the present invention, the content of Fe in the metal layer is set to 0.4% to 0.7% by mass, thereby having an effect of improving the heat generation by electromagnetic wave induction of the metal layer.
In another embodiment of the present invention, the metal layer further includes Cu: 0.2% -0.3%, Si: 0.04 to 0.06 percent.
In the embodiment of the invention, Si in the metal layer: the content of (b) is set to 0.04-0.06% by mass. Si: the metal layer is an element with higher hardness, the strength of the metal layer can be improved by adding a certain amount of Si into the metal layer, but if the content of Si in the metal layer is lower than 0.04 percent, the effect of Si on improving the strength of the metal layer is limited; if Si in the metal layer: when the content of (b) exceeds 0.06%, Si reduces intermetallic compounds having a circle equivalent diameter of 1.0 to 5.0 μm which become nucleation points for recrystallization, so that the final crystal particle diameter becomes large, and uneven forming is likely to occur at the time of paper pot forming, resulting in a reduction in paper pot formability. In view of the above considerations, in the embodiment of the present invention, the ratio of Si in the metal layer: the content of (b) is set to 0.04-0.06% by mass.
Cu is a very hard metal, and the addition of Cu can significantly improve the strength of the metal layer. Of course, if the content of Cu is more than 0.3%, the health of the paper pot made of the metal layer may be affected since Cu is a heavy metal to cause a sanitary problem. However, if the Cu content is less than 0.2%, the improvement of the strength of the metal layer is limited. Therefore, in the embodiment of the invention, the addition amount of Cu is controlled within the range of 0.2-0.3%, so that the metal layer is healthy and sanitary, and the strength of the metal layer can be fully improved.
In the embodiment of the invention, the Al content in the metal layer is controlled to be 80-89% by mass, the C content is controlled to be 9.5-17.5% by mass, and the O content is controlled to be 0.7-2.8% by mass, so that the strength, flexibility and ductility of the paper pot can be improved, the stamping performance of the paper pot can be improved, and the paper pot is prevented from leaking when the paper pot is used for containing liquid food and heating and cooking food. Of course, if the content of Al, C, O, etc. in the metal layer is too low, the ductility, strength and toughness of the metal layer may be reduced, but if the content of Al, C, O, etc. in the metal layer is out of the range described in the embodiments of the present invention, the metal layer may be easily solidified, cracks may be easily generated during the press forming process, and the paper pot may be easily leaked during the use process.
As a specific implementation form of the embodiment of the present invention, the components in the metal layer may take any value in the content range of various elements, and the metal layer can have good ductility, flexibility and strength. Of course, as a preferred embodiment of the present invention, the contents of the components in the metal layer are set to Al: 80% -87%, C: 11.9% -17.5%, O: 0.7% -1.35%, Fe: 0.5% -0.7%, Cu: 0.2% -0.3, Si: 0.04-0.06, the ductility, flexibility and strength of the metal layer can achieve better effect.
The metal layer surface of the example of the present invention was observed by an optical microscope, or analyzed by using image analysis software in which a microscopic image of the metal layer surface was input to a computer, and the number of intermetallic compounds was measured, and then the circle-equivalent diameter of each intermetallic compound was determined, and it was found that the average crystal grain diameter of the metal layer of the example of the present invention was 20 μm or less, and the circle-equivalent diameter was 1.0 to 5.0 μm: the intermetallic compound can reach 1.0 multiplied by 104/mm2The above. These intermetallic compounds are often formed of Al — Fe system or Al — Fe — Si system, and these intermetallic compounds become nucleation sites during recrystallization, and can make the crystal grain size minute, thereby improving the ductility, toughness and strength of the metal layer, and easily deforming more uniformly during paper pot stamping, and thus greatly improving the formability. Also, the metal layers of the present examples were experimentally determined to have tensile strengths at 0 °, 45 °, 90 °, with an average tensile strength of up to 100N/mm 2The above. This indicates that the metal layer of the present invention has high toughness and strength, and thus the metal layer is not likely to cause cracks or the like during press forming. The circle-equivalent diameter in the present specification is defined as a diameter obtained by converting the area of the intermetallic compound into a perfect circle.
Since the metal layer of the embodiment of the present invention is formed by laminating the resin layer and the paper layer to form a composite layer and then punching the composite layer to manufacture the paper pot, as a specific embodiment of the present invention, the thickness of the metal layer is set to 0.0001 to 0.001mm, since the metal layer is easily subjected to pin holes, cracks in pressing, and the like when the composite layer is punched, when the manufacturing thickness is less than 0.0001mm, and the production efficiency is easily lowered. If the thickness exceeds 0.001mm, the heat conductivity of the paper pot can be improved, and the heat conversion efficiency of the paper pot can be improved, but the thickness of the whole paper pot becomes too thick, the production cost is increased, and the economic benefit is reduced, so the thickness of the metal layer is set to 0.0001-0.001 mm.
According to the metal layer provided by the embodiment of the invention, because the metal elements such as Al, Fe and Cu with good heat conductivity are added, the heat conductivity of the metal layer is greatly improved, when the mass percentage content of Al is set to be 80-87%, the mass percentage content of Fe is set to be 0.5-0.7% and the mass percentage content of Cu is set to be 0.2-0.3%, the heat conductivity of the metal layer can be improved to the maximum extent, and the performances such as ductility, toughness and strength of the metal layer cannot be influenced.
The metal layers provided by the present invention are further illustrated by the following examples 1-19, but the present invention is not limited to these examples.
Preparing a material containing Al: 80% -89%, Fe: 0.4% -0.7%, C: 9.5% -17.5%, O: 0.7% -2.8%, Cu: 0.2% -0.3%, Si: 0.04 to 0.06 percent of alloy blocks, and the like, and finally rolling the alloy blocks into metal layers, wherein the thicknesses of the metal layers of the examples are shown in Table 2, and the compositions of the metal layers of the examples are shown in Table 1. The thermal conversion efficiency and ductility of each example metal layer are shown in table 2. Wherein the ductility of the metal layer of each example is 1mm3Ductile area (mm) of metal layer2) And (6) judging.
TABLE 1 compositions (wt%) of the metal layers of examples 1-19
TABLE 2 thermal conversion and ductility of the metal layers of examples 1-19
As can be seen from table 2, in the metal layers provided in embodiments 1 to 19 of the present invention, by adding the elements of Al, C, O, Fe, Cu, Si, etc. in the above contents, the ductility, flexibility, and strength of the metal layers in the embodiments are greatly improved, so that the stamping forming performance of the metal layers can be greatly improved, and cracks are prevented from easily occurring in the metal layers during the stamping forming process. In addition, because the metal layer is added with Al and Fe metal elements with proper content and good thermal conductivity, the thermal conductivity of the metal layer of each embodiment is also obviously improved, the thermal conversion efficiency can be as high as 90 percent, and the metal layer can be well applied to a paper pot, and meanwhile, the paper pot can be prevented from leaking, and the heating efficiency of the paper pot is improved.
Referring to fig. 1, a paper pot made of a composite material formed by combining the metal layer, the resin layer and the paper layer according to an embodiment of the present invention includes a bottom 1; a side wall connected to the bottom 1; the bottom part 1 and/or the side wall comprises a resin layer, a paper layer and the metal layer; and two side surfaces of the metal layer are respectively connected with the resin layer and the paper layer.
In an embodiment of the present invention, the bottom 1 is a quadrangle, the four side portions 2 are connected by four folding portions 3, and the folding portions 3 are folded to make the two adjacent side portions 2 adjacent to each other, so that the bottom 1, the side portions 2 and the folding portions 3 form an open square paper pot. Of course, as other embodiments of the present invention, the bottom 1 may be another polygon such as triangle, pentagon, etc., and the bottom 1 is connected with a corresponding number of the side portions 2 and the folding portions 3 to form a paper pot with an open polygonal inner space.
The paper pot provided by the embodiment of the invention is adapted to the quadrangular bottom 1, the four folding parts 3 are provided with the folding structures 4, wherein the connection part of the folding part 3 and the side part 2 is provided with a first folding structure 41 and a second folding structure 43, and a third folding structure 42 is further arranged between the first folding structure 41 and the second folding structure 43.
The first and third folding structures 41, 42 form a first fold-in surface 44 and a first fold-out surface 45, and the second and third folding structures 43, 42 form a second fold-in surface 46 and a second fold-out surface 47.
In one embodiment of the present invention, when each folded portion 3 is folded, the first folded-in surface 44 may be connected to the second folded-in surface 46, the first folded-out surface 45 may be connected to the outside of the side portion 2, or the second folded-out surface 47 may be connected to the outside of the side portion 2, so that an inner space with an opening may be formed between the bottom portion 1, the side portion 2, and the folded portion 3.
As another embodiment of the present invention, when each folded portion 3 is folded, the first outer fold surface 45 may be connected to the second outer fold surface 47, the first inner fold surface 44 may be connected to the inside of the side portion 2, or the second inner fold surface 46 may be connected to the inside of the side portion 2, thereby forming an inner space with an opening between the bottom portion 1, the side portion 2, and the folded portion 3.
As another embodiment of the present invention, when a part of the folded portion 3 is folded, the first folded-in surface 44 may be connected to the second folded-in surface 46, the first folded-out surface 45 may be connected to the outside of the side portion 2, or the second folded-out surface 47 may be connected to the outside of the side portion 2. When the other folded portion 3 is folded, the first folded-out surface 45 is connected to the second folded-out surface 47, the first folded-in surface 44 is connected to the inside of the side portion 2, or the second folded-in surface 46 is connected to the inside of the side portion 2, thereby forming an inner space with an opening between the bottom portion 1, the side portion 2, and the folded portion 3.
In order to make it possible to adjust the size of the opening of the internal space formed between the bottom 1, the side 2 and the fold 3, the angle a of the first 41 and third 42 folds and of the second 43 and third 42 folds is set between 25 ° and 45 °; the angle of the third fold 42 with respect to the two angles B of the upper edge line of the fold 3 is set between 45 ° and 75 °; the angle C of the first folding structure 41 to said bottom 1 and the second folding structure 43 to the bottom 1 is set at an angle of 85-110. By adjusting the size of the angles a, B and C, the size of the opening of the inner space formed between the bottom 1, the side 2 and the folded portion 3 can be changed.
In a most preferred embodiment of the present invention, the angle a is set to 30 °, the angle B is set to 75 °, and the angle C is set to 105 °. The pot wall of the folded paper pot is slightly inclined outwards, so that the capacity of the paper pot can be increased, and the inner and outer upper edges of the paper pot can be kept flush.
Of course, as another preferred embodiment of the present invention, the angle a is set to 45 °, the angle B is set to 45 °, and the angle C is set to 90 °. The pot wall of the folded paper pot is vertical, so that the lifting strength of the paper pot can be improved, and the distortion of the paper pot when the paper pot is held is reduced.
In addition, as an embodiment of the present invention, the angle a of the upper edge of the folded portion 3 is an obtuse angle, and the size of the angle a is set to be smaller than or equal to the angles b and d of the upper edge of the folded portion 3 and the upper edge of the side portion 2. This allows the upper edge of the folded paper pot to remain flush, even with the outer upper edge higher than the inner upper edge, so that the soup in the paper pot does not overflow along the inner wall of the paper pot. In order to achieve better strength and anti-overflow effect, in the embodiment of the present invention, the length of the third folding structure 42 is greater than or equal to the length of the first folding structure 41 and the second folding structure 43. Therefore, the folded shape of the paper pot can be better restrained, the occurrence of liquid leakage is reduced, and the lifting strength is enhanced.
Based on the above-mentioned idea, if the cost is also reduced, in the embodiment of the present invention, the angle a of the two upper edges of the folded portion 3 can be set to be larger than the angles b and d of the upper edges of the folded portion 3 and the upper edges of the side portion 2, and the outer end of the third folding structure 42 is higher than the water line of the paper pot after being folded. Therefore, the water level line is taken as a reference, unnecessary material loss is reduced, and the purposes of reducing or preventing liquid leakage and reducing cost are achieved. Also, in order to further reduce the cost without reducing the cooking effect, in the embodiment of the present invention, the metal layer of the sidewall may be disposed at the water line of the sidewall, and if the sidewall is heated by electromagnetic induction, the original effect may be achieved, and the loss of the metal layer is reduced. It will be appreciated that without the metal layer, the innermost resin layer would still need to be fully covered in order to meet the specifications for leak resistance and food containers. However, in an extreme case, a resin layer may be provided following the metal layer.
Meanwhile, the reinforcing ribs are arranged on the inner side wall of the side part 2, so that the overall strength of the paper pot can be enhanced, and the paper pot can be prevented from being excessively deformed. As a specific embodiment of the invention, the reinforcing ribs are parallel to the bottom part 1 and are arranged on the inner side walls of the side parts 2 at equal distances from the bottom part 1, so that the strength of the paper pot can be enhanced, and when the paper pot contains food, the reinforcing ribs can also serve as the highest water level line and can also serve as a liquid level reminding function.
Because the paper pot can not be filled with soup, the upper edge of the folded paper pot can be ensured to be higher than the highest water level line through the set angle a according to the action of the highest water level line played by the reinforcing ribs.
As another embodiment of the present invention, the folding structure 4 of the folding part 3 may also adopt other suitable folding structures to match with the bottom part 1 of other polygonal shapes such as triangle, pentagon, etc., and when the folding part 3 is folded, the bottom part 1, the corresponding number of side parts 2 and the corresponding number of folding parts 3 are connected together to form a paper pot with an open polygonal inner space.
Referring to fig. 3, when the folded portion 3 is unfolded, the bottom portion 1, the side portion 2, and the folded portion 3 in the unfolded state are on the same plane. Can be in large batches stack together like this, conveniently carry and transport, simultaneously, by the folding paper pot that forms of plane state, can be in batches, swift compound when producing its composite bed that includes metal level, resin layer and ply, and the composite bed that is in the plane state makes things convenient for the production machine to carry out batch cutting. When the paper pot is needed, the folding part 3 is folded according to the folding method, and the inner space with the opening, which is composed of the bottom part 1, the side part 2 and the folding part 3, can be formed. Not only is convenient to carry and transport, but also is convenient and quick to use.
In one embodiment of the present invention, the bottom 1, or the side wall formed by the side portion 2 and the folded portion 3, or the bottom 1 and the side wall are formed by a resin layer, a metal layer and a paper layer, and both side surfaces of the metal layer are connected to the resin layer and the paper layer, respectively. Because the paper layer forming the bottom 1 and the side wall is provided with the metal layer, the strength of the paper pot is enhanced, the leakage is prevented, the paper pot can be directly heated by open fire or placed on an electromagnetic oven or in a microwave oven for electromagnetic heating, the instant cooking is realized, and the use is very convenient. And in order to ensure the edible safety, a food-grade resin layer is also arranged on the metal layer. In another embodiment of the present invention, the metal layer is connected with the resin layer and the paper layer through the adhesive film.
Referring to fig. 4, as an embodiment of the present invention, a coupling portion 9 for coupling the folded portion 3 with the side portion 2 is provided between the folded portion 3 and the side portion 2. The connection portion 9 may be disposed on the first folded-out surface 45, the second folded-out surface 47 or/and the outer side surface of the side portion 2, and when the first folded-in surface 44 is connected to the second folded-in surface 46, the first folded-out surface 45 is connected to the outer side of the side portion 2 through the connection portion 9, or the second folded-out surface 47 is connected to the outer side of the side portion 2 through the connection portion 9, thereby forming a paper pot with an opening, which is composed of the bottom portion 1, the side portion 2 and the folded portion 3.
As another connection mode of the present invention, the connection portion 9 may be provided on the first folded-in surface 44, the second folded-in surface 46 or/and the inner surface of the side portion 2, and when the first folded-out surface 45 is connected to the second folded-out surface 47, the first folded-in surface 44 is connected to the inner side of the side portion 2 through the connection portion 9, or the second folded-in surface 46 is connected to the inner side of the side portion 2 through the connection portion 9, thereby forming a paper pot with an opening composed of the bottom portion 1, the side portion 2 and the folded portion 3.
As still another connection mode of the present invention, the first folded-in surface 44 of a part of the folded portion 3 may be connected to the second folded-in surface 46, the first folded-out surface 45 may be connected to the outside of the side portion 2, or the second folded-out surface 47 may be connected to the outside of the side portion 2; and the first outer folding surface 45 and the second outer folding surface 47 of the other part folding part 3 are connected, the first inner folding surface 44 and the inner side of the side part 2 are connected, or the second inner folding surface 46 and the inner side of the side part 2 are connected, and correspondingly, a part of the combination part 9 is arranged on the first outer folding surface 45, the second outer folding surface 47 or/and the outer side of the side part 2, and the other part of the combination part 9 is arranged on the first inner folding surface 44, the second inner folding surface 46 or/and the inner side of the side part 2. Thus forming a paper pot with an opening consisting of a bottom part 1, side parts 2 and a folded part 3.
In an embodiment of the present invention, the joint 9 is a clip strip disposed on the first folded-in surface 44, the second folded-in surface 46, the first folded-out surface 45 or/and the second folded-out surface 47, and a clip groove disposed on the inner surface or/and the outer surface of the side portion 2, but it is also possible that the clip groove is disposed on the first folded-in surface 44, the second folded-in surface 46, the first folded-out surface 45 or/and the second folded-out surface 47, and the clip strip is disposed on the inner surface or/and the outer surface of the side portion 2. When in connection, the clamping strip is clamped on the clamping groove, so that the folded folding part 3 is clamped with the side part 2.
As another embodiment of the present invention, the joining portion 9 may be a double-sided tape, and the folded portion 3 and the side portion 2 may be adhered together by the double-sided tape. Of course, the joint 9 may be a clip member such as a pin, and directly clip the folded portion 3 and the side portion together.
The above-mentioned joint 9 is only an example of the present invention, and the embodiment of the present invention is not limited thereto. It will be appreciated by those skilled in the art that the combination 9, which can connect the side portion 2 and the folded portion 3 together, is included in the present embodiment.
In order to facilitate taking the paper pot, two opposite side parts 2 in the side parts 2 are provided with handle parts, and the handle parts are connected to the edges of the side parts 2 in a foldable manner and can be flexibly folded. And, be provided with protruding structure on the handle portion, frictional force when can increase and take plays anti-skidding effect.
In addition, still be provided with the tableware on the handle portion and place the mouth for place tableware such as chopsticks or ladle, the user of being convenient for uses chopsticks or ladle to stir food at the in-process of culinary art to and be convenient for provide the place of placing for chopsticks or ladle when drawing the paper pot, and the tableware is placed the mouth and is the structure that expands from top to bottom, and chopsticks or ladle are placed and be difficult to drop on the mouth is placed to the tableware like this.
In another embodiment of the invention, a metal layer is partially laid on the side 2 of the paper pot; or, a metal layer is arranged at the part of the side part 2 connected with the pan bottom; be provided with the waterline on the lateral wall, the metal level is laid to waterline department from the part of being connected with the bottom of a boiler, and lateral part 2 is higher than the part of waterline and does not set up the metal level, can save the cost, avoids the upper portion heating of lateral wall moreover and leads to inconvenient paper pot of extracting.
In another embodiment of the present invention, the paper pot further comprises a pot cover; the pot cover is covered on the opening of the paper pot; the heat loss and the water loss caused by steam loss in the cooking process can be reduced, and the cooking taste is kept; the pot cover is provided with an orifice for water injection of the food machine, so that the situation that a user is injured by hot water due to water splashing caused by water sprayed to the pot wall or food in the water injection process is prevented.
The manufacturing method of the paper pot provided by the embodiment of the invention comprises the following steps:
the metal layer, the food-grade resin layer and the paper layer are provided in the embodiment of the invention.
And compounding the resin layer, the metal layer and the paper layer together to form a composite layer according to the sequence of the food-grade resin layer, the metal layer and the paper layer from inside to outside.
As one embodiment of the present invention, the resin layer, the metal layer and the paper layer may be laminated together in the order of the food-grade resin layer, the metal layer and the paper layer from the inside to the outside to form a composite layer.
In another embodiment of the present invention, the resin layer, the metal layer, and the paper layer may be bonded in this order from inside to outside to form a composite layer.
Then, the area of the required composite layer is calculated according to the preset size of the paper pot. And then cutting one composite layer according to the area size of the required composite layer.
Finally, the cut composite layers are placed on a die to be punched, and the bottom portion 1, the side portion 2 and the folded portion 3 can be punched on the composite layers, wherein the folded portion 3 is punched in advance to form the first folded structure 41, the third folded structure 42 and the second folded structure 43. When the folding paper is not used, the bottom 1, the side 2 and the folding part 3 are positioned on the same plane to form a piece of paper, so that the folding paper does not occupy space and is convenient for batch packaging and transportation. When the food heating device is used, the food heating device can be folded into a paper pot which can be used for packaging food or containing liquid food and heating the food by simply folding the paper pot. The use is very convenient and fast. And because the composite layer of the paper pot has the metal layer, the paper pot does not leak, and the strength can completely meet the use requirement. Meanwhile, due to the good heat-conducting property of the metal layer, the paper pot can improve the cooking efficiency when being heated and cooked. Greatly facilitating the use.
As shown in fig. 5 and 6, the embodiment of the present invention provides a paper pot, which comprises a bottom wall 1; and a side wall 2 connected to the bottom wall 1; the side wall 2 may include a side portion 21, a transition portion 22 and a folded portion 23, and an upper edge of the side portion 21, an upper edge of the transition portion 22 and an upper edge of the folded portion 23 are bent in the same direction to form the fixing portion 3.
The paper pot provided by the embodiment of the invention can be approximately in a square structure as a whole, the bottom wall 1 of the paper pot can be square, the number of the side parts 21 of the side wall 2 can be four, the side parts are opposite to each other in pairs, the transition part 22 can be positioned between the two adjacent side parts 21, so that the area of the top end of the side wall 2 can be larger than that of the bottom end of the side wall, the paper pot is convenient to use, meanwhile, the transition part 22 can be in a plane shape, the cross section of the paper pot can be octagonal, the volume of the paper pot is increased, and more food can be contained. In addition, when folding, fold portion 23, can form fixed part 3 through bending the upper edge of lateral part 21, transition portion 22 and folded portion 23 syntropy again after folding for the stable in structure of paper pot, it is convenient to fold.
The paper pot provided by the embodiment of the invention comprises a bottom wall and a side wall connected with the bottom wall; the side wall comprises a side part, a transition part and a folding part, and the upper edge of the side part, the upper edge of the transition part and the upper edge of the folding part are bent in the same direction to form a fixing part, so that when the paper pot needs to contain food, the folding part can be folded, and then the upper edges of the side part, the transition part and the folding part are bent in the same direction to form the fixing part, so that the folding of the paper pot can be completed; when needs carry, can be with the reverse bending of the upper edge of lateral part, transition portion and folding portion for the fixed part is disassembled, then opens folding portion, can realize taking apart the paper pot, thereby has reduced the volume of paper pot, convenient to carry.
In an alternative embodiment, see fig. 5 and 6, the side portions 21 and the transition portions 22 may be connected by folding of the fold portions 23. That is, when the paper pot is folded, the folding part 23 is folded to realize the connection between the side part 21 and the transition part 22, so as to form the side wall of the paper pot, thereby facilitating the operation.
In an alternative embodiment, referring to fig. 5, the bottom wall 1, the side portions 21, the transition portion 22 and the fold 23 in the unfolded state are in the same plane. That is to say, when needing to carry, can be with the upper edge reverse bending of lateral part 21, transition portion 22 and folded portion 23 for fixed part 3 is disassembled, then opens folded portion 23 again, can make the paper pot form a piece of paper, thereby furthest has reduced the whole occupation space of paper pot, and is more convenient to carry.
Specifically, in an alternative embodiment, referring to fig. 5, the fold 23 may include a first fold 231 and a second fold 232 connected to each other; the first folding structure 231 may be connected with the transition portion 22 and the second folding structure 232 may be connected with the side portion 21.
In the above embodiment, the first folding structure 231 and the second folding structure 232 may have various structural forms as long as the side portion 21 and the transition portion 22 can be connected to each other after being folded, and in this embodiment, the first folding structure 231 may include a folding wing 231b connected between the transition portion 22 and the side portion 21, and a first folding fold 231a disposed at the connection position of the transition portion 22 and the folding wing 231 b;
And the second folding structure 232 may include a second fold provided between the folding wing 231 and the side portion 21.
According to the above embodiment, referring to fig. 5 and 6, the side portion 21 and the transition portion 22 may be folded by the first fold line 231a and the second fold line such that the inner surface of the folding wing 231b may be connected with the inner surface of the transition portion 22 and the outer surface of the folding wing 231b may be connected with the outer surface of the side portion 21; of course, the inner surface of the folding wing 231b can be connected with the inner surface of the side portion 21, and the outer surface of the folding wing 231b can be connected with the outer surface of the transition portion 22, so that the connection between the side portion 21 and the transition portion 23 can be realized.
It should be noted that, referring to fig. 6, in order to facilitate the fixing of the paper pot after the folding is completed, in the first folding structure 231 of the two folding portions 23 located at the two sides of the transition portion 23, the inner surfaces of the folding wings 231b may be connected with the inner surface of the transition portion 22, and the outer surfaces of the folding wings 231b are connected with the outer surface of the side portion 21, so that after the folding of each folding portion 23 is completed, the upper edge of the side portion 21, the upper edge of the transition portion 22, and the upper edge of the folding portion 23 are bent in the same direction to form a firmer fixing portion 3, thereby making the structure of the paper pot more stable.
In order to further improve the convenience of the paper pot, referring to fig. 6, in an alternative embodiment, the fixing portion 3 may extend along the upper edge of the side wall 2 to form a handle portion, and the fixing portion 3 may extend and curl outward, so that the fixing portion 3 forms the handle portion of the paper pot, and when the paper pot is used, a user can take the paper pot through the handle portion to avoid being burned, thereby further improving the convenience of the paper pot and improving the user experience.
In an alternative embodiment, see fig. 5 and 6, a raised area 11 may be provided in the middle of the inner surface of the bottom wall 1; the contour of the raised area 11 can be adapted to the contour of the bottom wall 1. No matter the heating source is electromagnetic heating, open fire heating or other heating modes, the middle temperature of the container for containing food is always the highest, in the embodiment, in order to avoid the situation that food in the pot is burnt due to overhigh middle temperature of the bottom wall 1 of the paper pot, the middle part of the inner surface of the bottom wall 1 is provided with the protruding area 11, so that the distance between the inner surface of the middle part of the bottom wall 1 and the heating source is increased through the protruding area 11, the distance between the food positioned in the middle part of the paper pot and the heating source is increased, the overhigh middle temperature of the bottom wall is further avoided, and the situation that the food is burnt is avoided.
In an alternative embodiment, see fig. 5 and 6, a third fold 4 may be provided between the bottom wall 1 and the side portion 21, and a fourth fold 5 may be provided between the bottom wall 1 and the transition portion 22; the third fold 4 may be linear; the fourth folding mark 5 is connected with the third folding mark 4 and is in a convex arc shape; the transition 22 is an arc-shaped wall adapted to the fourth fold 5.
In the above embodiment, by providing the third fold 4 and the fourth fold 5 between the bottom wall 1 and the side portion 21 and between the bottom wall 1 and the transition portion 22, the side portion 21 and the transition portion 22 can be folded conveniently by the third fold 4 and the fourth fold 5 even in the state where the bottom wall 1, the side portion 21, the transition portion 22 and the folded portion 23 are all unfolded, so that the folding of the paper pot is more convenient and faster. Specifically, third crease 4 can be the straight line form, and fourth crease 5 is connected and is the arc of evagination with third crease 4 to make two adjacent lateral parts 21 can pass through transition portion 22 rounding off, and then make paper pot lateral wall 2 not have the edges and corners, further improved its convenient to use nature.
In an alternative embodiment, the bottom wall 1 and/or the side wall 2 may comprise a resin layer, a metal layer and a paper layer connected in sequence; alternatively, the side wall 2 comprises a resin layer and a paper layer. In this embodiment, the metal layer can be set up to the internal surface of paper pot again to make this paper pot can carry out electromagnetic heating and boil the food, can also prevent seepage, can also improve the ductility of this paper pot. Moreover, a resin layer can be arranged above the metal layer, and the resin layer is an edible resin layer so as to improve the use safety of the paper pot.
The embodiment of the invention provides cooking equipment which comprises the paper pot.
The embodiment of the invention provides cooking equipment, which comprises a paper pot, a cooking device and a cooking device, wherein the paper pot comprises a bottom wall and a side wall connected with the bottom wall; the side wall comprises a side part, a transition part and a folding part, and the upper edge of the side part, the upper edge of the transition part and the upper edge of the folding part are bent in the same direction to form a fixing part, so that when the paper pot needs to contain food, the folding part can be folded, and then the upper edges of the side part, the transition part and the folding part are bent in the same direction to form the fixing part, so that the folding of the paper pot can be completed; when needs carry, can be with the reverse bending of the upper edge of lateral part, transition portion and folding portion for the fixed part is disassembled, then opens folding portion, can realize taking apart the paper pot, thereby has reduced the volume of paper pot, convenient to carry.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (13)
1. The utility model provides a metal level, is applicable to in the paper pot which characterized in that: the alloy comprises the following components in percentage by mass: 80% -89%, Fe: 0.4 to 0.7 percent.
2. The metal layer of claim 1, further comprising, in mass percent: c: 9.5% -17.5%, O: 0.7% -2.8%, Cu: 0.2% -0.3%, Si: 0.04 to 0.06 percent.
3. The metal layer of claim 1, wherein: the metal layer comprises Al: 82.5% -89%, C: 9.6% -13.5%, O: 1.9% -2.75%, Fe: 0.4 to 0.52 percent.
4. The metal layer of claim 1, wherein: the metal layer comprises Al: 80% -87%, C: 11.9% -17.5%, O: 0.7% -1.35%, Fe: 0.5% -0.7%, Cu: 0.2% -0.3, Si: 0.04-0.06 percent.
5. The metal layer of any of claims 1-4, wherein the metal layer has a thickness of 0.0001-0.001 mm.
6. A paper pot is characterized by comprising a bottom; a sidewall connected to the bottom; the bottom and/or the side walls comprise a resin layer, a paper layer and a metal layer according to any of claims 1-5; the two side surfaces of the metal layer are respectively connected with the resin layer and the paper layer;
The side wall comprises a folded portion and a side portion; the folded portion is connected with the side portion; adjoining the adjacent both side portions by folding of the folded portion; the bottom, side and folded portion in the unfolded state may be in the same plane.
7. The paper pot of claim 6, wherein the folding part is provided with a folding structure, wherein the folding part comprises a first inward folding surface, a first outward folding surface, a second inward folding surface and a second outward folding surface; the first inward-folded surface is connected with the second inward-folded surface, and the first outward-folded surface or the second outward-folded surface is connected with the outer side of the side part; or the first outer folding surface is connected with the second outer folding surface, and the first inner folding surface or the second inner folding surface is connected with the inner side of the side part.
8. A paper pan according to claim 7, characterized in that the folds and the side portions form angles A, B, C, a, B, d; wherein said angle A is 30 °, said angle B is 75 °, said angle C is 105 °; or, the angle a is 45 °, the angle B is 45 °, and the angle C is 90 °; the angle a of the two upper sidelines of the folding part is less than or equal to the angles b and d of the upper sidelines of the folding part and the upper sidelines of the side part; the angle a is an obtuse angle.
9. A paper pot, comprising: a bottom wall; and a side wall connected to the bottom wall; the side wall comprises a side part, a transition part and a folding part, and the upper edge of the side part, the upper edge of the transition part and the upper edge of the folding part are bent in the same direction to form a fixing part.
10. The paper pan of claim 9, wherein the fold comprises a first fold structure and a second fold structure connected to each other;
the first folding structure comprises a folding wing connected between the transition part and the side part, and a first crease arranged at the connection part of the transition part and the folding wing;
the second folding structure comprises a second fold disposed between the folding wing and the side portion;
the inner surface of the folding wing is connected with the inner surface of the transition part, and the outer surface of the folding wing is connected with the outer surface of the side part; or the inner surface of the folding wing is connected with the inner surface of the side part, and the outer surface of the folding wing is connected with the outer surface of the transition part.
11. A paper pan as claimed in claim 9, wherein a third fold is provided between the bottom wall and the side portion, and a fourth fold is provided between the bottom wall and the transition portion;
The third crease is linear; the fourth crease is connected with the third crease and is in a convex arc shape; the transition part is an arc-shaped wall matched with the fourth fold.
12. A method for manufacturing a paper pot according to any one of claims 6 to 11, comprising,
providing the metal layer, the resin layer and the paper layer;
sequentially compounding the resin layer, the metal layer and the paper layer to form a composite layer;
cutting the composite layer;
stamping the cut composite layer to form a paper pot;
wherein the metal layer is the metal layer of any one of claims 1 to 5.
13. The method of claim 12, wherein the sequentially laminating the resin layer, the metal layer and the paper layer to form a laminated layer comprises:
and sequentially pressing or bonding the resin layer, the metal layer and the paper layer to form a composite layer.
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| CN202010674073.4A CN111850352A (en) | 2020-07-14 | 2020-07-14 | Metal layer, paper pot and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010674073.4A CN111850352A (en) | 2020-07-14 | 2020-07-14 | Metal layer, paper pot and manufacturing method thereof |
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| CN111850352A true CN111850352A (en) | 2020-10-30 |
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