Spiral wound paper tube and packaging container

Abstract

The application discloses a spiral paper tube and a packaging container, wherein the spiral paper tube comprises at least one spiral paper layer, and the inner side of the spiral paper tube is spirally provided with a PE-aluminum foil composite layer; the PE-aluminum foil composite layer comprises a PE layer, an aluminum foil layer and a base paper layer which are sequentially and tightly connected; the PE surface of the PE-aluminum foil composite layer faces the inner cavity of the paper tube; one side of the PE-aluminum foil composite layer is inwardly folded; the PE layer at the folded edge is crimped by the other side of the PE-aluminum foil composite layer; the PE layers of the two sides are integrally formed by hot melting and crimping, thereby forming a crimping part of the folded edge; the spiral paper layer comprises a structure for giving way corresponding to the crimping part of the folded edge; and the spiral paper layer and the PE-aluminum foil composite layer are radially pressed to form a smooth paper tube. The technical scheme is favorable for manufacturers to select paper tubes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spiral paper tube, in particular to a spiral paper tube and a packaging container. BACKGROUND

[0002] In order to meet the requirements of air tightness and oxygen tightness in paper food packaging, the inner wall of the packaging material is often pasted with plastic such as PE. However, in order to achieve oxygen tightness, a relatively thick plastic material is often pasted. Reducing the thickness and application of such material requires the use of a composite film, which complicates the process and forms a spiral protrusion on the outer surface of the can body during the extrusion process in the manufacturing process, affecting the selection of manufacturers. SUMMARY

[0003] The main purpose of the present application is to provide a spiral paper tube, which aims to make the side wall of the spiral paper tube smooth and uniform.

[0004] The spiral paper tube provided by the present application comprises at least one spiral paper layer, the inner side of the spiral paper tube is provided with a PE-aluminum foil composite layer in a spiral manner, the PE-aluminum foil composite layer comprises a PE layer, an aluminum foil layer and a base paper layer connected in sequence, wherein the PE surface of the PE-aluminum foil composite layer faces the inner cavity of the paper tube, one edge of the PE-aluminum foil composite layer is inwardly folded, the PE layer at the folded edge is crimped by the other edge of the PE-aluminum foil composite layer, and the PE layers of the two are integrally pressed by heat melting to form a crimped edge portion; the spiral paper layer comprises a clearance structure arranged in a spiral corresponding to the crimped edge portion; the spiral paper layer and the PE-aluminum foil composite layer are radially pressed to form a smooth paper tube.

[0005] Optionally, the thickness of the PE layer is 0.02 to 0.15 mm, the thickness of the aluminum foil layer is 0.004 to 0.05 mm, the width of the crimped edge portion is 3 to 15 mm, and the thickness of the base paper layer is 0.04 to 0.15 mm.

[0006] Optionally, the clearance structure is a recess formed by the first spiral paper layer, the recess is arranged in parallel with the edge of the first spiral paper layer, the width of the recess is adapted to the width of the crimped edge portion, and the width of the first spiral paper layer is the same as the distance between the crimped edge portion and the adjacent crimped edge portion; the first spiral paper layer has a first section and a second section, the two sections are connected by an upper layer of paper, and the recess is arranged on the side of the first section and the second section towards the crimped edge portion.

[0007] Optionally, the letting-in structure is an elastic part formed in the second spiral paper layer, the elastic part extending parallel to the edge of the spiral paper layer, the spiral paper layer comprising an outer layer and a first segment and a second segment attached to the outer layer, the elastic part being arranged between the first segment and the second segment, the width of the elastic part being adapted to the width of the crimped edge, and the width of the spiral paper layer being the same as the distance between the crimped edge and the adjacent crimped edge.

[0008] Optionally, the letting-in structure is a missing part formed on one side of the third spiral paper layer, one side of the third spiral paper layer being arranged along the side edge of the crimped edge in the spiral direction, the third spiral wrap layer one side and the other side of the next turn being located on the two sides of the crimped edge respectively, and at least one side being close to the crimped edge.

[0009] Optionally, the third spiral paper layer and the single-layer PE-aluminum foil composite layer together form a basic spiral paper layer, the height of the basic spiral paper layer being less than or equal to the height of the crimped edge after extrusion, and the thickness of the third spiral paper layer being 0.7 to 1.0 times the thickness of the crimped edge.

[0010] Optionally, the third spiral paper layer and the single-layer PE-aluminum foil composite layer together form a basic spiral paper layer, the height of the basic spiral paper layer being greater than the height of the crimped edge after extrusion, and the thickness of the third spiral paper layer being 1.03 to 1.8 times the thickness of the crimped edge.

[0011] The application further provides a packaging container comprising a spiral paper tube or a spiral paper tube formed by cutting a spiral paper tube along an axial direction, one end of the spiral paper tube being sealingly connected to a top cover or a bottom cover to form a container comprising a side wall formed by the spiral paper tube, one end of the container being open and the other end being sealingly connected to the bottom cover or the top cover.

[0012] The application further provides a packaging container comprising a spiral paper tube or a spiral paper tube formed by cutting a spiral paper tube along an axial direction, both ends of the spiral paper tube being sealingly connected to a top cover and a bottom cover respectively to form a closed space, the space being provided with materials to be preserved.

[0013] The application further provides a packaging container comprising a spiral paper tube or a spiral paper tube formed by cutting a spiral paper tube along an axial direction, both ends of the spiral paper tube being sealingly connected to a top cover and a bottom cover respectively to form a closed space, the space being provided with materials to be preserved. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only show some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0015] Figure 1 Structure schematic view of a spiral paper tube manufacturing process embodiment of the present application;

[0016] Figure 2 Structure schematic view of another spiral paper tube manufacturing process embodiment of the present application;

[0017] Figure 3 Structure schematic view of a spiral paper tube embodiment of the present application;

[0018] Figure 4 Structure schematic view of Figure 3 Structure schematic view of a cross section of an embodiment at M-M;

[0019] Figure 5 Structure schematic view of Figure 4 Enlarged view of a part at A;

[0020] Figure 6 Structure schematic view of Figure 3 Structure schematic view of a cross section of another embodiment at M-M;

[0021] Figure 7 Structure schematic view of Figure 6 Enlarged view of a part at B.

[0022] Explanation of the reference signs:

[0023]

[0024] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0026] It should be noted that all direction indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the direction indications also change accordingly.

[0027] In addition, the description involving "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" throughout the text includes three schemes, for example, A and / or B includes A technical scheme, B technical scheme, and A and B simultaneously meet the technical scheme; in addition, the technical schemes of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical schemes appears contradictory or unachievable, it should be considered that the combination of technical schemes does not exist, and is not within the protection scope required by the present application.

[0028] The present application discloses a spiral paper tube 100, as shown by Figures 1 to 6 The spiral paper tube 100 is formed by multiple layers of wrapping paper, and at least one layer of adhesive layer between adjacent layers of paper. Generally, multiple layers of paper are spirally wound on the roller 110 at the same entering angle, one side of the paper is adjacent to the other side of the next turn, and is continuously wound on the roller 110 or the lower material, so as to realize a spiral paper layer 111. Generally, the splicing edge of the spiral paper layer 111 is staggered with the splicing edge of the adjacent layer, so that the adhesive and the wrapping paper are tightly connected through extrusion, so that the paper roll is more solid and stable. The extrusion can be achieved by arranging the roller 110 in the paper tube, and extruding by pressing the belt outside the spiral paper tube 100, while rotating the roller 110 to continuously spiral into the new wrapping paper, forming a continuous spiral paper tube 100 production. In order to further improve the adhesive bonding strength between the layers of the paper tube and the shaped and pressed paper tube, the rotating roller 110 is also heated by the heater 113, so as to transfer heat to the paper tube and improve the temperature of the paper tube, further strengthening the adhesive layer and the overall structural strength of the paper tube.

[0029] Spiral paper tube 100 can be designed with specific diameter and length to achieve different applications in daily life, such as reducing diameter and increasing length to form a thin straw or similar fluid pipe; when the wall thickness of spiral paper tube 100 is 0.6 to 2.5 mm; spiral paper tube 100 adopts a diameter of 50 to 150 mm and a suitable length to form a cylindrical wall of a packaging can, and the two ends are connected by sealing with the cover and the bottom to form a packaging material for food and the like; when a larger diameter is adopted, a packaging material for specific objects can be formed for packing industrial raw materials and the like. The paper tube involved in the present application is used for food and the like with sealing requirements on the inner wall, such as oxygen permeability or water vapor permeability limitation, and can meet the corresponding sealing standards according to the requirements of relevant standards. When the standard adopted contains pressure bearing requirements, the corresponding pressure bearing standards can be met by adjusting the type and thickness of the paper, the type of adhesive and the coating method.

[0030] Some embodiments of the present application disclose a spiral paper tube 100, such as Figures 1 to 6As shown, the spiral paper layer 111 is provided with a PE-aluminum foil composite layer 201 on the inner side of the paper tube, wherein the PE side of the PE-aluminum foil composite layer 201 faces the inner cavity of the paper tube. According to the national standard, the PE material can meet the food standard requirements. The PE side is formed by the PE layer, which faces the inner cavity of the paper tube. One side of the PE-aluminum foil composite layer 201 is folded inward, and the PE layer at the folded edge is crimped by the other side of the PE-aluminum foil composite layer 201. The PE layers of the two are integrally connected by hot melting, forming a crimping portion 203. The PE-aluminum foil composite layer 201 is in the form of a film. During the rolling process of the spiral paper tube 100, it is obliquely rolled and attached to the surface of the roller 110. The outer side of the PE-aluminum foil composite layer 201 is folded inward, that is, the folded edge on one side is folded inward toward the inner tube and is pressed on the PE-aluminum foil composite film. When the roller 110 continues to rotate, the PE layer at the folded edge is crimped by the other side of the next PE-aluminum foil composite layer 201. The crimping portion is formed by the hot melting of the PE layers of the two. The crimping portion is formed by the PE layer of the PE-aluminum foil composite film. The PE layer of the next PE-aluminum foil composite layer 201 is downward, so that the two PE layers can be contacted and sealed by hot melting. The width of the folded edge is much larger than the thickness of the PE-aluminum foil film, which ensures sufficient hot melting width and air-tight and water-tight performance. After hot melting, the aluminum foil layer also forms a local folded edge, and a layer of aluminum foil is pressed on the structure. The gap between the folded edge of the aluminum foil and the aluminum foil layer of the crimped PE-aluminum foil composite layer 201 is very small, and the width of the folded edge is much larger than the gap. After hot melting, the gap becomes thinner and more compact through the extrusion of the roller 110 and the pressure belt. The aluminum foil layer is beneficial to the formation of oxygen sealing effect. The above closed aluminum foil layer avoids the influence of the external environment on the internal food in the microwave or electromagnetic environment. Due to the folded edge and the crimping of the other side, a crimping portion is formed at the folded edge. The thickness of the crimping portion is about three times the thickness of the PE-aluminum foil layer, which highlights the current PE-aluminum foil composite layer 201 and forms a spiral extending protruding crimping portion. The spiral paper layer 111 is provided with a spiral arrangement of a folded edge crimping portion 203. The spiral paper layer 111 and the PE-aluminum foil composite layer 201 are radially pressed to form a smooth paper tube.The let structure is arranged close to the folding and pressing part 203, the center positions correspond to each other, and the widths also correspond to each other, and the correspondence here means that as long as the smooth paper tube can be obtained after radial pressing. The smooth paper tube here refers to the spiral protrusions on the outer surface after radial extrusion, that is, the technical effect of the present application is achieved. In the prior art, some food packaging cans with appearance requirements have a layer of label paper on the outside of the can. If the PE-aluminum foil composite layer 201 is used for folding and hot melting, obvious spiral protrusions will be formed on the outside of the can, giving a rough and inferior impression and reducing the expectations of consumers for the product. In order to improve the appearance of the product, those skilled in the art do not tend to use this form with spiral protrusions on the outside, and often use methods such as grinding the outside to achieve a smooth outside of the can body.

[0031] Some embodiments of the present application disclose a spiral paper tube 100, wherein the let structure is arranged close to the folding and pressing part 203, the thickness of the PE layer is 0.02-0.15 mm, the thickness of the aluminum foil layer is 0.004-0.05 mm, the width of the folding and pressing part 203 is 3-15 mm, and the let structure is an elastic part formed by the spiral paper layer where the folding and pressing part 203 is arranged. Figures 1 to 7 As shown in the figure, the folding and pressing part 203 is an elastic part formed by the let structure of the spiral paper layer, and the two are arranged correspondingly. After the spiral paper tube 100 is extruded by the roller 110 and the pressure belt, the elastic part is extruded in volume, and the deformed volume is squeezed into the gap formed, and the folding and pressing part 203 protrudes into the elastic part, so that the two form a close connection structure, which enhances the compression resistance of the spiral paper tube 100 in the vertical direction. In some embodiments, according to Figures 1 to 7 As shown in the figure, the let structure is a missing part 211 of the spiral paper layer, and the folding and pressing part 203 corresponds to the outer spiral paper layer, forming a solid spiral paper layer and a missing part 211 close to it. The missing part 211 corresponds to the folding and pressing part 203 and is arranged along the spiral angle.

[0032] Some embodiments of the present application disclose a spiral paper tube 100, according to Figures 1 to 7As shown, the positioning structure includes a recess formed in the first spiral paper layer 204, which extends parallel to the edge of the first spiral paper layer 204, the thickness of the first spiral paper layer 204 is greater than the height of the folded edge protrusion, the width of the recess is matched with the width of the folded edge crimping part 203, and the width of the first spiral paper layer 204 is the same as the distance between the folded edge crimping part 203 and the adjacent folded edge crimping part 203. The positioning structure is formed on the outer side of the PE-aluminum foil composite layer 201, and the first spiral paper layer 204 has a first section 206 and a second section 207 connected by the upper layer paper. Between the first section 206 and the second section 207, there is a recess on the side facing the folded edge crimping part 203, which extends spirally along the folded edge crimping part 203, that is, the recess extends parallel to the edge of the spiral paper layer, and the thickness of the spiral paper layer is greater than the height of the folded edge crimping part 203, and the width of the recess is matched with the width of the folded edge crimping part 203, so that the folded edge crimping part 203 can protrude into the recess. In the case of extrusion of the roller 110 and the compression belt, the first section 206 and the second section 207 and the single-layer PE-aluminum foil composite layer 201 become the basic spiral paper layer height, and after the folded edge crimping part 203 is matched with the recess, the height after extrusion is less than the basic spiral paper layer height. The width of the first spiral paper layer 204 is the same as the distance between the folded edge crimping part 203 and the adjacent folded edge crimping part 203, so that in the rotating paper feeding process, the first spiral paper layer 204 can feed together with the PE-aluminum foil composite layer 201, and the edge of another rotating first spiral paper layer 204 adjacent thereto is in close contact, so that in the case of matching the recess with the folded edge crimping part 203, the first spiral paper layer 204 does not appear crimping or gap therebetween. That is, after extrusion of the roller 110 and the compression belt, there is no surface protrusion or surface depression; or after further bonding of the spiral paper outside, after extrusion of the roller 110 and the compression belt, there is no surface protrusion or surface depression.

[0033] Some embodiments of the present application disclose a spiral paper tube 100, according to Figures 1 to 7As shown in the figure, the accommodation structure includes an elastic part formed in the second spiral paper layer, which extends parallel to the edge of the spiral paper layer, the spiral paper layer includes an outer layer paper and a first section 206 and a second section 207 attached thereto, and the elastic part is arranged between the first section 206 and the second section 207, the thickness of the second spiral paper layer is greater than or equal to the height of the crimped edge portion 203, the width of the elastic part is adapted to the width of the crimped edge portion 203, and the width of the spiral paper layer is the same as the distance between the crimped edge portion 203 and the adjacent crimped edge portion 203. The accommodation structure is formed on the outside of the PE-aluminum foil composite layer 201, and the second spiral paper layer has a first section 206 and a second section 207 connected by the upper layer paper, and an elastic part is arranged on the side of the first section 206 and the second section 207 towards the crimped edge portion 203, which will deform and shrink in volume when subjected to pressure, and the elastic part extends spirally along the crimped edge portion 203, that is, the elastic part extends parallel to the edge of the spiral paper layer, wherein the thickness of the second spiral paper layer is greater than the height of the crimped edge portion 203, and the width of the elastic part is adapted to the width of the crimped edge portion 203, so that the crimped edge portion 203 can protrude into the elastic part, and in the case of extrusion of the roller 110 and the pressure belt, the first section 206, the second section 207, the single-layer PE-aluminum foil composite layer 201 and the long layer paper together form the basic spiral paper layer height, and after extrusion, the height of the crimped edge portion 203 and the elastic part is less than or equal to the basic spiral paper layer height. In some cases, the elastic part in the above embodiment is greater than the crimped edge portion 203, and when the extrusion force of the roller 110 and the pressure belt is large, the spiral paper on it will deform, reducing the yield. The width of the second spiral paper layer is the same as the distance between the crimped edge portion 203 and the adjacent crimped edge portion 203, so that in the process of rotating the paper, the second spiral paper layer can rotate together with the PE-aluminum foil composite layer 201, and tightly abut against the edge of another second spiral paper layer adjacent thereto, so that the second spiral paper layer does not appear to be crimped or have a gap therebetween under the condition that the elastic part cooperates with the crimped edge portion 203. That is, after extrusion by the roller 110 and the pressure belt, there is no surface protrusion or surface depression; or after further bonding of the second spiral paper on the outside, there is no surface protrusion or surface depression after extrusion by the roller 110 and the pressure belt.

[0034] Some embodiments of the present application disclose a spiral paper tube 100, according to third spiral wrap layerThe third spiral paper layer is provided with a missing part 211 on one side of the third spiral paper layer, and the one side of the third spiral paper layer is arranged along the side of the fold pressing part 203 in the spiral direction, and the other side of the next turn is located on the two sides of the fold pressing part 203, and at least one side is close to the fold pressing part 203. The missing part 211 is located corresponding to the fold pressing part 203 and extends spirally, and in the case that the roller 110 and the pressing belt are extruded, the third spiral paper layer and the single-layer PE-aluminum foil composite layer 201 form a basic spiral paper layer height together, and the height is the same as or slightly lower than the height of the fold pressing part 203 after extrusion, that is, the thickness of the third spiral paper layer is 0.7-1.0 times the thickness of the fold pressing part 203, and the height of the third spiral paper layer is equal to the height of the fold pressing part 203, and the height of the third spiral paper layer is equal to the height of the fold pressing part 203. third spiral wrap layer The connecting surface after heat melting rapidly enters the extrusion of the roller 110 and the pressing belt, third spiral wrap layer The spiral paper layer on the outer side is attached to the surface, and is bonded to the spiral paper layer. After the fold pressing part 203 passes through heat melting, the temperature decreases and the liquid changes into a molten state, the spiral paper layer on the outer side is extruded and deformed, one side of the spiral paper layer on the outer side is attached to the inner wall of the spiral paper layer on the outer side, and some molten PE material is deformed and attached to the inner wall of the spiral paper layer on the outer side. third spiral wrap layer In the connecting gap of the fold pressing part 203, during rapid rotation and extrusion, the fold pressing part 203 and the third spiral paper layer are tightly connected, and the PE-aluminum foil folded edge and the spiral paper layer on the outer side are connected in a shape-adapted form, which improves the connection strength of the PE-aluminum foil layer, and forms smooth wall surfaces inside and outside the spiral paper cylinder 100.

[0035] In another embodiment of the present application, a spiral paper cylinder 100 is disclosed, wherein the accommodation structure includes a missing part 211 formed on one side of the third spiral paper layer, and the one side of the third spiral paper layer is arranged along the side of the fold pressing part 203 in the spiral direction, third spiral wrap layerThe other side of the next turn is located on both sides of the crimping part 203, and at least one side is close to the crimping part 203. In this way, the missing part 211 is in position correspondence with the crimping part 203 and extends spirally. When the roller 110 and the pressing belt are pressed, the third spiral paper layer and the single-layer PE-aluminum foil composite layer 201 together form a basic spiral paper layer height, and the height is greater than the height of the crimping part 203 after extrusion, that is, the thickness of the third spiral paper layer is 1.03 to 1.8 times the thickness of the crimping part 203. In this way, the pressure formed along the surface of the roller 110 by the PE layer after heating and melting realizes the crimping of the next turn PE-aluminum foil composite layer 201 to the hot melting surface. After the spiral paper layer on it is wound outside the third spiral paper layer, it is then pressed by the roller 110 and the pressing belt. In some cases, due to the very large extrusion force, the entire spiral paper cylinder 100 is deformed at the contact between the roller 110 and the pressing belt. To avoid the effect of the rotating pressure inward force on the hot melting surface, thereby tearing and causing poor quality, when the thickness of the third spiral paper layer is 1.03 to 1.8 times the thickness of the crimping part 203, the third spiral paper layer bears greater pressure, reduces the hot melting layer that is not completely cooled, and improves the quality yield and consistency. The missing part 211 on one side of the third spiral paper layer cooperates with the crimping part 203 of the PE-aluminum foil composite layer 201, and the connection shape between the folded edge of the PE-aluminum foil and the spiral paper layer on the outside is adapted, which on the one hand improves the elasticity of the entire spiral paper layer, and on the other hand forms a smooth wall surface inside and outside the spiral paper cylinder 100.

[0036] According to the above various embodiments, the PE-aluminum foil composite layer 201 including the crimping part 203 is tightly attached to the three types of spiral paper layers containing the accommodation structure, forming a spiral paper layer inner sleeve, and at least one spiral paper layer is further attached to the outside of the inner sleeve through the adhesive layer. In some embodiments, the number of layers is 2 to 6 layers, including 3, 4, and 5 spiral paper layers. For the first and second paper layers, the upper layer can be further attached and adhered to the upper layer, which in some cases reduces the impact of local unevenness and improves the strength of the spiral paper cylinder 100. For the third spiral paper layer, the missing part 211 on one side of the third spiral paper layer is in position correspondence with the crimping part 203 of the PE-aluminum foil composite layer 201, and the connection shape between the folded edge of the PE-aluminum foil and the spiral paper layer on the outside is adapted, which on the one hand improves the elasticity of the entire spiral paper layer, and on the other hand forms a smooth wall surface inside and outside the spiral paper cylinder 100. Figures 1 to 7 The molten PE material can be attached and shaped to increase the connection strength and improve stability and reliability.

[0037] Some embodiments of the present application disclose a packaging container, which adopts the spiral paper tube 100 proposed in each of the above embodiments, and is sealed at one end of the paper tube with a top cover or a bottom cover to form a container comprising a side wall formed by the spiral paper tube 100, an open end, and a sealed end connected with the bottom cover or the top cover. In some embodiments, according to actual needs, the spiral paper tube 100 is cut into a short spiral paper tube 100 along the axis, and the short spiral paper tube 100 is sealed at one end with a top cover or a bottom cover to form a container comprising a side wall formed by the spiral paper tube 100, an open end, and a sealed end connected with the bottom cover or the top cover. The above container is sold to manufacturers, such as chicken essence manufacturers, as a commodity, and the manufacturers use it as a packaging material. The container is sealed at one end with a top cover or a bottom cover, and the other end is open. The manufacturers add materials, such as chicken essence, into the container through the discharge port on the production line. Subsequently, the open end is sealed with a corresponding bottom cover or top cover. Generally, in order to facilitate the manufacturers, the manufacturers are left to install the end cover. For example, when the structure of the top cover is complex and difficult to process, the top cover is connected with the spiral paper tube 100, and is delivered to the manufacturers as a commodity, and the manufacturers install the bottom cover.

[0038] Some embodiments of the present application disclose a container, which adopts the spiral paper tube 100 proposed in each of the above embodiments, or in some embodiments, according to actual needs, the spiral paper tube 100 is cut into a short spiral paper tube 100 along the axis. The two sections of the spiral paper tube 100 are sealed with a top cover and a bottom cover, respectively, to form a closed space, and the space is provided with materials to be preserved. The PE layer is formed by the above material, and the surface of the PE layer faces the inner cavity of the paper tube. One edge of the PE-aluminum foil composite layer 201 is inwardly folded, the PE layer at the folded edge is crimped by the other edge of the PE-aluminum foil composite layer 201, and the PE layers of the two edges are integrally pressed by heat melting to form a crimped edge 203. The PE-aluminum foil composite layer 201 is a film, such as Figures 1 to 7As shown, it is folded inward from the oblique direction and attached to the surface of the roller 110 during the process of winding into the spiral paper tube 100, and the outer edge of the folded edge is folded inward, that is, the folded edge on one side is folded inward to the direction of the inner tube, and is pressed on the PE-aluminum foil composite film; when the roller 110 continues to rotate, the PE layer at the folded edge is pressed by the other side of the next PE-aluminum foil composite layer 201, and high-temperature air is heated at the pressing position and before the pressing position, and the PE layers of the two are integrally fused by heating, forming a pressing portion. The pressing portion skillfully uses the PE layer of the PE-aluminum foil composite film itself, and the folded edge of the PE-aluminum foil composite film makes the PE layer located on the outer side of the film body, and the PE layer of the next PE-aluminum foil composite layer 201 faces downward, so that the two PE layers can be contacted, and the sealing performance of the whole PE composite film layer can be formed by heating and fusing. Thus, the inner wall PE layer meeting the food requirements and the PE-aluminum foil composite layer 201 meeting the oxygen sealing and water vapor sealing requirements are formed, and the protrusion of the folded edge pressing portion 203 does not affect the appearance shape of the product by setting the accommodation structure, becoming a smooth outer wall surface of the tube, meeting the user's high-quality packaging requirements, and improving the user's quality expectation for the material to be stored.

[0039] Some embodiments of the present application disclose an electromagnetic shielding container, which adopts the spiral paper tube 100 proposed in each of the above embodiments, or in some embodiments, according to actual needs, adopts the spiral paper tube 100 cut from the spiral paper tube 100 proposed in each of the above embodiments, that is, the short spiral paper tube 100 formed after the spiral paper tube 100 proposed in each of the above embodiments is cut along the axis. Wherein the two sections of the spiral paper tube 100 are respectively sealed to the top cover and the bottom cover. The top cover is formed in a sheet shape by a metal material, and in some embodiments, an aluminum foil, an aluminum alloy, tinplate, etc. are adopted to meet the crimping performance, so as to form a combined sheet or a single sheet capable of being sealed and connected with the spiral paper tube 100. The bottom cover is formed in a sheet shape by a metal material, and in some embodiments, an aluminum foil, an aluminum alloy, tinplate, etc. are adopted to meet the crimping performance, so as to form a combined sheet or a single sheet capable of being sealed and connected with the spiral paper tube 100. The two sections of the spiral paper tube 100 are respectively sealed to the top cover and the bottom cover formed by a metal material. At the same time, due to the inward folding of one side of the PE-aluminum foil composite layer 201, the PE layer at the folding edge is crimped by the other side of the PE-aluminum foil composite layer 201, and the PE layers of the two are integrally pressed by heat melting, and the aluminum foil layer also forms a local folding structure, and a layer of aluminum foil is further pressed on the folding edge, and the folding edge of the aluminum foil is a continuous metal film, and the gap between the folding edge of the aluminum foil and the aluminum foil layer in the crimped PE-aluminum foil composite layer 201 is very small, and the width of the folding edge is much larger than the gap, and especially after heat melting, the gap becomes thinner and more compact through the extrusion of the roller 110 and the pressing belt, so as to form a closed aluminum foil layer inside the spiral paper layer PE layer. The two sections of the spiral paper tube 100 are respectively sealed to the top cover and the bottom cover formed by a metal material, so as to form a closed space in the container, so that the to-be-preserved objects are isolated from the microwave and electromagnetic environment, so as to protect the sensitive objects, wherein the sensitive objects include substances that are deformed by microwave heating and substances that are easily damaged by electromagnetic waves. For some to-be-preserved objects that are affected by microwaves, a unique microwave isolation effect is achieved, so that substances that are deformed by microwave heating, such as microwave corn and saccharin, are obtained. For some to-be-preserved objects that are affected by electromagnetic waves, a unique electromagnetic wave isolation effect is achieved, so that substances that are easily damaged by electromagnetic waves, such as developing solution and unexposed film, are obtained.

[0040] The present application mainly proposes a spiral paper tube 100, which is mainly applied to packaging objects, so that the spiral paper tube 100 can record the information of the packaged objects or the information of the packaging structure through the chip 300. In this way, the third party can avoid tampering with the relevant information by replacing the outer packaging. The information of the objects and the information of the packaging structure are true and reliable.

[0041] The specific structure of the spiral paper tube 100 will be mainly described below.

[0042] Reference ​In the embodiment of the present application, the spiral paper tube 100 comprises a first spiral paper layer 11a, and a chip 300 with an antenna is fixedly arranged on the first spiral paper layer 11a, the antenna is used for receiving signals in a first state and transmitting signals in a second state, the thickness of the chip 300 is more than 1.5 times of the thickness of the antenna; the chip 300 and the antenna are arranged on the outer side of the first spiral paper layer 11a; and / or the chip 300 and the antenna are arranged on the inner side of the first spiral paper layer 11a.

[0043] Specifically, in the embodiment, the spiral paper tube 100 comprises at least one first spiral paper layer 11a, and the first spiral paper layer 11a is spirally formed into a cylindrical structure. The chip 300 is arranged on the outer side wall or the inner side wall of the cylindrical structure. Of course, in some embodiments, the chip 300 can be arranged on both the inner side wall and the outer side wall of the cylindrical structure. The chip 300 has an antenna, and information exchange with the outside can be realized through the antenna. In a first state of the antenna, signals can be received, and in a second state of the antenna, signals can be transmitted. Therefore, the information on the chip 300 can be written or read by an external device. The written information can be various, such as physical information of the packaged material, sealing information of the packaging structure, etc., which can be related to the shelf life of the material. As for the chip 300, it can be an RFID card, i.e., a wireless radio frequency identification card.

[0044] In the embodiment, by arranging the chip 300 with the antenna on the spiral paper tube 100, the chip 300 can interact with the outside through the antenna, that is, the information in the chip 300 can be read by an external device, and the external device can also write information into the chip 300. Therefore, when the spiral paper tube 100 is used for packaging, the information of the material packaged by the spiral paper tube 100 can be truly and accurately recorded, so as to avoid tampering with the material information in the spiral paper tube 100 by replacing the outer packaging of a third party, etc. Therefore, it is beneficial for the user to better judge the quality, shelf life, etc. of the material through related information.

[0045] In some embodiments, in order to improve the strength and reliability of the spiral paper tube 100, at least one second spiral paper layer 11b is further arranged on the inner side of the first spiral paper layer 11a, the second spiral paper layer 11b has a second splicing gap, and the second splicing gap is staggered with the first splicing gap of the first spiral paper layer 11a. In the embodiment, by staggering the splicing gaps of the first spiral paper layer 11a and the second spiral paper layer 11b, the weak links of each spiral paper layer are staggered, and the structure of the other layer is used to compensate for the strength of the splicing gap, so as to improve the overall strength of the spiral paper tube 100.

[0046] In some embodiments, in order to improve the reliability of the antenna and chip 300, a high polymer coating layer is coated on the antenna and chip 300, which is attached to the inner side or outer side of the first spiral paper layer 11a by adhesive. By coating the high polymer layer on the antenna and chip 300, the antenna and chip 300 are protected from the influence of dust, insects and other external environments on the operation of the antenna and chip 300.

[0047] In some embodiments, in order to improve the production efficiency of the spiral paper tube 100, the number of the chip 300 is multiple, and multiple chip 300 are arranged at a preset distance along the length direction of the spiral paper tube 100. In the production process of the spiral paper tube 100, a long spiral paper tube 100 is first produced, and multiple chips 300 are uniformly arranged in the long spiral paper tube 100. In the subsequent processing process, according to the actual situation, the long spiral paper tube 100 is cut into multiple sections, and it is ensured that there is at least one chip 300 in each section of the spiral paper tube 100.

[0048] In some embodiments, in order to improve the sealing and shielding properties of the spiral paper tube 100, the inner side wall of the spiral paper tube 100 is further provided with a spiral aluminum foil layer, which extends along the direction of the spiral paper tube 100 to form a shielding cylindrical structure; a bottom paper layer 202 is arranged between the outer side wall of the spiral aluminum foil layer and the inner side wall of the first spiral paper layer 11a, the spiral aluminum foil layer is attached to one side of the bottom paper layer 202, and the other side of the bottom paper layer 202 is bonded to the first spiral paper layer. That is, an aluminum foil layer is arranged on the inner side wall of the spiral paper tube 100, so that the inner side wall of the spiral paper tube 100 is covered by the aluminum foil layer. In this way, the inner cavity of the spiral paper tube 100 has a shielding function.

[0049] In some embodiments, in order to improve the sealing performance of the spiral paper tube 100, the inner side of the spiral aluminum foil is provided with a PE layer, the PE layer includes a plurality of PE films; the side edges of the PE films are folded inward to form flanges, the flanges have PE surfaces facing the inside of the tube, and the PE surfaces are crimped on the adjacent PE films to form a complete PE layer, and the PE layer and the spiral aluminum foil together form a PE-aluminum foil composite layer 201. The PE layer is arranged on the inner side wall of the aluminum foil layer to seal the aluminum foil layer well. In some embodiments, the antenna and the chip 300 are outside the spiral paper tube 100, and the spiral paper tube 100 further includes a label paper layer, which is bonded to the outer side of the spiral paper tube 100. It is worth noting that in some embodiments, the width of the folded edge is 0.5 to 35 mm, preferably 10 mm, and by heating the PE layer at the folded edge or the PE layer of the aluminum foil layer in contact with it, the PE layers of the two are integrated by hot melting and crimping to form a sealed PE layer surface and an aluminum foil layer surface. The PE-aluminum foil composite layer includes a PE layer, an aluminum foil layer, and a base paper layer that are sequentially and closely connected.

[0050] In some embodiments, in order to make the side wall of the spiral paper tube 100 smooth and symmetrical, the outer side of the chip 300 is further provided with a third spiral paper layer 11c, and a recess structure is arranged on the third spiral paper layer 11c corresponding to the chip 300, and the chip 300 is installed in the recess structure. By arranging the recess structure, the antenna and the chip 300 are buried in the recess structure, so that the inner side wall and the outer side wall of the spiral paper tube 100 after extrusion molding are very flat. In this way, the external pressure is not targeted to extrude the protruding parts, which can cause damage to the chip 300, and is beneficial to the stable existence of the chip 300 in the side wall of the spiral paper tube 100, and is beneficial to improve the reliability of the chip 300 working.

[0051] The application also provides a packaging material capable of reading and writing information, which includes a bottom cover and a spiral paper tube 100, and the specific structure of the spiral paper tube 100 is referred to the above embodiments. Since the computer case adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. One end of the spiral paper tube 100 is sealingly connected with the bottom cover, and the other end is open for pouring materials. The chip 300 in the spiral paper tube 100 is used for writing material information and / or quality assurance information. The chip 300 writes information in the spiral paper tube 100 and the current material added to the spiral paper tube 100, and the material information in the chip 300 is determined according to the current processing technology, so that the material and the chip 300 are consistent. The material information is determined according to the user's customization.

[0052] The application further provides a package capable of reading and writing information, which comprises a bottom cover and a spiral paper tube 100, the specific structure of which is referred to the above-mentioned embodiments, and the computer case adopts all the technical solutions of the above-mentioned embodiments, thus having all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. The package further comprises a top cover, which is sealingly connected with the two ends of the spiral paper tube 100, and the chip 300 of the spiral paper tube 100 is used for writing the sealingly connected information corresponding to the material quality assurance information.

[0053] The application further provides a package manufacturing equipment, which comprises a package capable of reading and writing information, the specific structure of which is referred to the above-mentioned embodiments, and the package adopts all the technical solutions of the above-mentioned embodiments, thus having all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. The spiral paper tube 100 is sealingly connected with a bottom cover at one end and is open at the other end for pouring material, and the chip 300 in the spiral paper tube 100 is used for writing the material information and / or quality assurance information. The package manufacturing equipment further comprises a mounting bracket for fixing the package, a reading head for reading the preset information stored in the chip 300 of the package, and a writing head for writing the material information into the chip 300 of the package.

[0054] In some embodiments, the application further provides a shielding containing tank, which comprises a spiral paper tube 100 or a short spiral paper tube 100 cut from the spiral paper tube 100, has a metal cover connected with the spiral paper tube 100, and the distance between the metal cover and the aluminum foil ring is less than 0.1 mm after being grooved, extruded and finally formed, thus forming the shielding containing tank.

[0055] The above-mentioned is only the preferred embodiments of the application, which does not limit the patent scope of the application, and any equivalent structural transformation made according to the application specification and the attached drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the application.

Claims

1. A spiral wound paper roll comprising at least one spiral wound paper layer, characterised in that: The inner side of the spiral paper roll is provided with a PE-aluminum foil composite layer in a spiral manner, the PE-aluminum foil composite layer comprises a PE layer, an aluminum foil layer and a base paper layer which are sequentially and closely connected, the PE-aluminum foil composite layer is in a film shape, the PE surface of the PE-aluminum foil composite layer faces the inner cavity of the paper roll, one side of the PE-aluminum foil composite layer is inwardly folded, the PE layer at the folded side is crimped by the other side of the PE-aluminum foil composite layer, and the PE layers of the two sides are integrally formed by hot melting and crimping, thereby forming a crimping part of the folded side; the spiral paper layer comprises a clearance structure which is provided in a spiral manner corresponding to the crimping part of the folded side; the spiral paper layer and the PE-aluminum foil composite layer are radially pressed to form a smooth paper roll.

2. The spiral wound paper roll of claim 1, wherein: The thickness of the PE layer is 0.02-0.15 mm, the thickness of the aluminum foil layer is 0.004-0.05 mm, the width of the crimping part of the folded side is 3-15 mm, and the thickness of the base paper layer is 0.04-0.15 mm.

3. The spiral wound paper roll of claim 1, wherein: The clearance structure is a recess formed by a first spiral paper layer, the recess is provided in parallel with the edge of the first spiral paper layer, the width of the recess is adapted to the width of the crimping part of the folded side, and the width of the first spiral paper layer is the same as the distance between the crimping part of the folded side and an adjacent crimping part of the folded side; the first spiral paper layer has a first section and a second section, the two sections are connected by an upper layer of paper, and the recess is located on the side of the first section and the second section which faces the crimping part of the folded side.

4. The spiral wound paper roll of claim 1, wherein: The clearance structure is an elastic part formed in a second spiral paper layer, the elastic part is provided in parallel with the edge of the spiral paper layer, the spiral paper layer comprises an outer layer of paper and a first section and a second section which are attached to the outer layer of paper, the elastic part is arranged between the first section and the second section, the width of the elastic part is adapted to the width of the crimping part of the folded side, and the width of the spiral paper layer is the same as the distance between the crimping part of the folded side and an adjacent crimping part of the folded side.

5. The spiral wound paper roll of claim 1, wherein: The clearance structure is a missing part formed on one side of a third spiral paper layer, one side of the third spiral paper layer is provided in a spiral direction along the side edge of the crimping part of the folded side, one side of the third spiral paper layer is located on one side of the crimping part of the folded side, and at least one side is close to the crimping part of the folded side.

6. The spiral wound paper roll of claim 5, wherein: The third spiral paper layer and the single-layer PE-aluminum foil composite layer jointly form a basic spiral paper layer, and the height of the basic spiral paper layer is less than or equal to the height of the crimping part of the folded side after extrusion, and the thickness of the third spiral paper layer is 0.7-1.0 times the thickness of the crimping part of the folded side.

7. The spiral wound paper roll of claim 5, wherein: The third spiral paper layer and the single-layer PE-aluminum foil composite layer jointly form a basic spiral paper layer, and the height of the basic spiral paper layer is greater than the height of the crimping part of the folded side after extrusion, and the thickness of the third spiral paper layer is 1.03-1.8 times the thickness of the crimping part of the folded side.

8. A packaging container comprising a spiral wound paper tube according to any one of claims 1-7, or a spiral wound paper tube formed by cutting a spiral wound paper tube according to any one of claims 1-7 in a direction perpendicular to the axial direction, characterized in that: One end of the spiral paper roll is sealingly connected with a top cover or a bottom cover to form a container which comprises a side wall formed by the spiral paper roll, one end of the container is open, and the other end is sealingly connected with the bottom cover or the top cover.

9. A packaging container using the spiral wound paper tube according to any one of claims 1 to 7, or a spiral wound paper tube cut in a direction perpendicular to the axial direction from the spiral wound paper tube according to any one of claims 1 to 7, characterized by: Both ends of the spiral paper roll are sealingly connected with a top cover and a bottom cover respectively to form a closed space, and the space is provided with materials to be preserved.

10. A packaging container using the spiral wound paper tube according to any one of claims 1 to 7, or a spiral wound paper tube cut in a direction perpendicular to the axial direction from the spiral wound paper tube according to any one of claims 1 to 7, characterized by: The two ends of the spiral paper roll are respectively sealed with a metal top cover and a metal bottom cover, forming a closed space for the preservation of the object to be preserved in a microwave and electromagnetic isolation environment.

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