CN114379924B

CN114379924B - Compression roller, laminated material and packaging container

Info

Publication number: CN114379924B
Application number: CN202111493272.6A
Authority: CN
Inventors: 吕晓军; 刘华文
Original assignee: Lamican Packaging Kunshan Co ltd
Current assignee: Lamican Packaging Kunshan Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2023-06-02
Anticipated expiration: 2041-12-08
Also published as: CN114379924A

Abstract

The application discloses compression roller, laminate and packaging container, above-mentioned compression roller is used for making laminate, includes: a body; the elastic material layer is arranged on the periphery of the body along the circumferential direction of the body; wherein, be provided with at least one recess on the elastic material layer, and in the extending direction of recess, the end to end both ends of recess are non-intercommunication. Through such design mode, the non-communicating design in end to end both ends of recess can reduce the probability that produces the deformation when forming the indent on laminate, and moreover, the design of arc recess can prolong the passageway of ventilating for the exhaust is thorough, and then reduces the defective rate.

Description

Compression roller, laminated material and packaging container

Technical Field

The present application relates to the technical field of laminates, and in particular to a press roll, a laminate and a packaging container.

Background

When the laminated material with the barrier layer is folded, air is easy to accumulate at the folded opening, and air is compressed under the action of the compression roller, so that the polymer film material of the laminated material is easy to break holes, the sealing performance is influenced, and the quality guarantee period of the food package is further influenced.

The technical solution used at present is that the pressing roller for manufacturing the laminated material is provided with continuous and parallel grooves, and the grooves are shaped into parallel straight lines crossing the pre-sealing position, so that the grooves on the pressing roller are easy to deform when the pressing groove is formed on the laminated material due to the fact that the periphery of the pressing roller is generally made of elastic materials, and the probability of deformation of the laminated material and the pressing groove is increased. Therefore, a new press roll is needed to solve the above problems.

Disclosure of Invention

The technical problem to be solved mainly by the present application is to provide a press roll, a laminate and a packaging container, which can reduce the probability of deformation when forming a press groove on the laminate.

In order to solve the technical problems, one technical scheme adopted by the application is as follows: there is provided a press roll for making a laminate, comprising: a body; the elastic material layer is arranged on the periphery of the body along the circumferential direction of the body; wherein, be provided with at least one recess on the elastic material layer, and in the extending direction of recess, the end to end both ends of recess are non-intercommunication.

Wherein, in the axial direction of the body, the at least one groove forms a plurality of annular structures which are arranged at intervals, and at least part of the annular structures are formed by at least two grooves which are arranged at intervals.

Wherein, in the axial direction, the annular structure extends around the periphery of the press roller and is perpendicular to the axis of the press roller; wherein the width of the annular structure is 15mm-40mm.

Wherein the ratio of the projected surface area of the groove on the annular structure to the surface area of the annular structure is 5% -70%.

And the adjacent two grooves respectively positioned on the adjacent two annular structures are arranged in a staggered manner in the axial direction.

The body comprises a first end part positioned in the axial direction, and a plurality of grooves of the continuous annular structure are arranged in a step dislocation manner in the direction away from the first end part.

Wherein, in the axial direction, each groove comprises a first side wall and a second side wall which are oppositely arranged, and the first side wall is close to the center of the body relative to the second side wall; wherein, the interval between two adjacent first side walls is 2.2mm.

Wherein, in the axial direction, a first distance between two adjacent grooves at an intermediate position is larger than a second distance between two adjacent grooves at the rest positions.

Wherein, the shape of each groove is the same; alternatively, the plurality of grooves include a first symmetry axis therebetween, and a first distance between two adjacent grooves on both sides of the first symmetry axis is greater than a second distance between two adjacent grooves at the remaining positions.

The side wall of the groove is arc-shaped, and the chord height of each arc is 0.4mm; alternatively, the side wall of the groove is linear.

Wherein the diameter of the body is 150mm-350mm; and/or the thickness of the elastic material layer is 10mm-30mm, and the hardness of the elastic material layer is 60HA-90HA.

Wherein the number of the grooves is 5-10, and/or the width of the grooves is 0.5-2 mm, and/or the depth of the grooves is 1-4 mm.

In order to solve the technical problems, another technical scheme adopted by the application is as follows: there is provided a laminate comprising: a core layer provided with an open-cell structure, wherein the open-cell structure is provided with a plurality of press grooves formed by the press rolls according to any of the above-mentioned embodiments, and in an extending direction of the press grooves, the head and tail ends of the press grooves are not communicated.

The number of the pressing grooves intersecting with the periphery of the open-pore structure is larger than or equal to the preset number; the indent penetrates the plane of the laminate; and/or the press groove only covers the open pore structure.

Wherein, the utility model also comprises a plurality of folds; in the length direction of the laminate, the folds comprise longitudinal folds perpendicular to the length direction of the laminate, and the indent is visually parallel to the longitudinal folds.

In order to solve the technical problem, another technical scheme adopted by the application is as follows: there is provided a packaging container formed by folding a laminate according to any of the embodiments mentioned above.

The beneficial effects of this application are: unlike the prior art, the present application provides a press roll for making a laminate comprising: a body; the elastic material layer is arranged on the periphery of the body along the circumferential direction of the body; wherein, be provided with at least one recess on the elastic material layer, and in the extending direction of recess, the end to end both ends of recess are non-intercommunication. Through such design mode, the non-communicating design in end to end both ends of recess can reduce the probability that produces the deformation when forming the indent on laminate, and moreover, the design of arc recess can prolong the passageway of ventilating for the exhaust is thorough, and then reduces the defective rate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a schematic view of a press roll according to an embodiment of the present application;

FIG. 2 is an expanded schematic view of the press roll of FIG. 1;

FIG. 3 is an enlarged view of a portion of one embodiment of the recess of FIG. 2;

FIG. 4 is an enlarged view of a portion of another embodiment of the recess of FIG. 2;

FIG. 5 is an enlarged view of a portion of a further embodiment of the recess of FIG. 2;

FIG. 6 is a schematic diagram showing sinusoidal slot amplitude with limited width;

FIG. 7 is an exemplary schematic of a non-sinusoidal curve;

FIG. 8 is a schematic diagram of a spiral curve;

FIG. 9 is a schematic structural view of an embodiment of the laminate of the present application;

FIG. 10 is a schematic view of an embodiment of the open cell structure of FIG. 9;

FIG. 11 is a schematic view of another embodiment of the open cell structure of FIG. 9;

fig. 12 is a schematic view of a further embodiment of the open cell structure of fig. 9.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, are within the scope of the present application based on the embodiments herein.

Referring to fig. 1-3, fig. 1 is a schematic structural diagram of an embodiment of a press roll of the present application, fig. 2 is an expanded schematic diagram of the press roll of fig. 1, and fig. 3 is a partial enlarged view of an embodiment of a groove of fig. 2. The press roll is used to make a laminate comprising a body 10 and a layer 12 of elastomeric material. Specifically, in the present embodiment, the elastic material layer 12 is disposed on the periphery (not labeled) of the body 10 along the circumferential direction of the body 10. In addition, in the present embodiment, with continued reference to fig. 2 and 3, at least one groove 120 is disposed on the elastic material layer 12, and the area of the groove 120 may be 5% -20% of the surface area of the elastic material layer 12, for example, 5%, 10%, 15%, 20%, etc., and of course, the area of the groove 120 may also be other proportion of the surface area of the elastic material layer 12, which is not limited herein. Further, in the extending direction a of the groove 120, the front and rear ends of the groove 120 are not communicated. That is, as shown in fig. 3, there is a break 130 between the end-to-end ends of the groove 120, and the break 130 is in a non-conductive state. In the present embodiment, for discontinuous grooves having a break or gap, the two ends of the grooves 120 may be very close, that is, the distance between the two ends of the grooves 120 in the extending direction a may be a fraction of the diameter of the press roll, and preferably, the length of the break 130 is 1mm-10mm, for example, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., which is not limited herein.

For better understanding, the above-described groove 120 may be equivalent to one continuous groove, a portion of which is filled to form a bridge (discontinuity 130), two or more such grooves 120 may be adjacent to each other, parallel or arranged at an angle, and the bridge may be staggered in its radial position so that two adjacent grooves have no bridge within a radial distance (e.g., within 15 degrees or 60 degrees of each other). For spiral grooves, the length of the discontinuities 130 may be long, but in this case, it is useful to break an original continuous spiral line with periodic bridges (discontinuities 130), and the design of the grooves 120 with non-communication between the ends thereof not only reduces the probability of deformation of the grooves 120, but also reduces the probability of deformation when forming a pressing groove in the laminate, thereby reducing the probability of defective products, due to the softer material of the elastomeric layer 12 and easy deformation. It should be noted that fig. 1-3 are not drawn to scale.

In general, as shown in fig. 1 and 2, the majority of the area of the elastomeric layer 12 is smooth, but has dense grooved areas (i.e., at least one groove 120), and in addition, the grooves 120 may be discontinuous, non-linear, or have oscillating waves or other variations that are simply straight. Furthermore, in the present embodiment, it may be due to the interruption of the grooves 120, or it may be due to the groove 120 being a spiral which may have an interruption, and the groove 120 or at least one of the grooves 120 may not form a closed loop, that is, the groove 120 may wind the pressing roller in the spiral pinion, rotate more than one turn, but may not form a closed loop.

Preferably, in the present embodiment, the length of the groove 120 is the width of the elastic material layer 12 when stretched minus the length of the discontinuity 130, and may specifically be 240mm-249mm, for example, 240mm, 242mm, 244mm, 246mm, 248mm, 249mm, etc., which is not limited herein. Specifically, in the present embodiment, with continued reference to fig. 1 and 2, in the axial direction b of the body 10, at least one groove 120 forms a plurality of annular structures 14 disposed at intervals, and in the present embodiment, a distance between two adjacent annular structures 14 may be 260mm or the like, which is not limited herein. Furthermore, in the present embodiment, at least part of the annular structure 14 is formed by at least two grooves 120 arranged at intervals, and the distance between two adjacent grooves 120 is 1mm-3mm, for example, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, etc., which are not limited herein.

In addition, as shown in fig. 2, A, B, C are three different schemes of the grooves 120, in practical application, the annular structures 14 formed by the three different schemes A, B, C may be sequentially arranged on the press roller at intervals, the annular structures 14 formed by the scheme a may be arranged on the press roller at intervals, the annular structures 14 formed by the scheme B may be arranged on the press roller at intervals, the annular structures 14 formed by the scheme C may be arranged on the press roller at intervals, or the annular structures 14 formed by the scheme A, B, C may be arranged on the press roller at intervals, and the combination scheme of the plurality of annular structures 14 on the press roller is not limited. Of course, in other embodiments, the annular structure 14 may be a combination of continuous grooves and discontinuous grooves, or a combination of wide grooves and narrow grooves, which is not limited herein. Of course, the number of annular structures 14 on the nip roll is not limited in this application.

Specifically, in this embodiment, the grooves 120 on the press roll need not cover the entire press roll, but need only be located in areas that may contact the laminate sections and the preformed openings, namely the above-described annular structures 14, with the annular structures 14 extending around the periphery of the press roll and perpendicular to the axis of the press roll. Further, in this embodiment, the opening of the laminate is about 20mm wide, so the width of the ring structure 14 is 15mm-40mm, which may be, for example, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, etc., without limitation. In addition, the grooves 120 are located substantially entirely in one or more of the annular structures 14, wherein the width of one of the annular structures 14 may be less than 50mm, for example, the width of one of the annular structures 14 may range from 15mm to 40mm, 15mm to 30mm, etc., and the annular structures 14 may be aligned with the area of the laminate where the openings appear for pressing. In one or more of such ring structures 14, the projected area of the grooves 120 on the ring structure 14 (e.g., projected surface area as seen from a top view) may occupy 5% to 70% of the surface area of the ring structure 14, e.g., may occupy a proportion in the range of 5% -60%,10% -50%,15% -60%,20% -55%, etc., and is not limited herein. Specifically, each of the different grooves 120 in the ring structure 14 may have at least one discrete region (i.e., the discontinuities 130), for example, the number of discrete regions within one ring structure 14 having a width of 20 mm-40mm may be any number, such as 1, 2, 3, 4, 5, etc., and specifically, the total number of discrete regions may be between 1-30 or any subset of the ranges therein, as not limited herein. Preferably, the ratio of the projected surface area of the groove 120 on the annular structure 14 to the surface area of the annular structure 14 may be 5% -70%, which is not limited herein. Of course, in other embodiments, the ratio may be 5% -60%,10% -50%,15% -60%,20% -55%, etc., without limitation. In one embodiment, to obtain the benefit of increasing the stability of the roller segments with "bridges," the bridges may be positioned in a different staggered pattern to distribute the stabilizing effect around the press roller. With continued reference to fig. 1-3, in the axial direction b, two adjacent grooves 120 respectively located on two adjacent ring structures 14 are offset from each other. It goes without saying that such a design may also provide for two adjacent discontinuities 130 to be offset from each other, so that after the formation of the open-porous structure in the laminate, it is ensured that there is an intermittent design in at least one of the press channels formed in the open-porous structure, so that the probability of deformation of the press channel is reduced to a large extent.

Further, the body 10 includes a first end 100 located in the axial direction b, and a plurality of grooves 120 of a plurality of consecutive ring structures 14 are arranged in a step-like offset manner in a direction away from the first end 100. In a direction perpendicular to the axial direction b, a non-conductive discontinuity 130 remains in each groove 120 at every other predetermined distance. Of course, the preset distance may be 49.1mm or the like, which is not limited herein. In this embodiment, the two adjacent discontinuities 130 may be arranged in a step-like offset manner, and the gradient between the two discontinuities 130 may be 6.14mm or other values, which is not limited in this application.

In this embodiment, the bridge-free area is synchronized with the spout area such that the location with the bridge does not treat the laminate in the spout area. Synchronization may be achieved by approaching the gap between successive nozzle areas by the perimeter of the press roll, plus a control system to ensure proper synchronization of the placement of the laminate on the press roll to avoid engagement of the discontinuities 130 with the nozzle areas. In this way, after the open-porous structure has been formed in the laminate, it is ensured that there is a discontinuous design on at least one of the press channels formed in the open-porous structure, so that the probability of deformation of the press channel can be reduced to a great extent.

Specifically, in the present embodiment, with continued reference to fig. 1 and 3, in the axial direction b, each groove 120 includes a first side wall 1200 and a second side wall 1201 disposed opposite to each other, and the first side wall 1200 is close to a central position (not shown) of the body 10 relative to the second side wall 1201; further, in the present embodiment, the interval d between two adjacent first side walls 1200 ₁ Is 1mm-2.2mm, e.g., 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 2.2mm, etc., and is not limited herein.

Furthermore, in the present embodiment, with continued reference to fig. 3, in the axial direction b, a first distance d is provided between two adjacent grooves 120 at an intermediate position ₂ Greater than a second distance d between two adjacent grooves 120 at the remaining positions ₃ 。

Further, referring to fig. 3, each of the grooves 120 has the same shape, a plurality of grooves 120 are spaced apart, and a first distance d is provided between two adjacent grooves 120 at the middle position ₂ Is 2mm-3mm, for example, 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, etc., and is not limited herein. A second distance d between two adjacent grooves 120 at the remaining positions ₃ Is 1mm-2.2mm, e.g., 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 2.2mm, etc., and is not limited herein.

In one example, referring to fig. 4, fig. 4 is an enlarged view of a portion of another embodiment of the recess of fig. 2. As shown in fig. 4, the plurality of grooves 120b include a first symmetry axis 16 therebetween, and a first distance d is provided between two adjacent grooves 120b located on both sides of the first symmetry axis 16 ₂ Greater than a second distance d between two adjacent grooves 120b at the remaining positions ₃ . Specifically, in the present embodiment, the plurality of grooves 120b may be mirror symmetrical about the first symmetry axis 16. Alternatively, in the present embodiment, a first distance d between two adjacent grooves 120b on either side of the first axis of symmetry 16 ₂ Is 2mm-3mm, for example, 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, etc., and is not limited herein. In the present embodiment, two adjacent grooves at the remaining positions120b at a second distance d ₃ Is 1mm-2.2mm, e.g., 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 2.2mm, etc., and is not limited herein.

In addition, in the present embodiment, please continue to refer to fig. 4, a third distance d ₄ A fourth distance d is the minimum lateral distance between two adjacent lines ₅ Is the maximum lateral distance between two adjacent lines. If the direction of the line is at an angle to the machine direction axis, a lateral distance perpendicular to the direction angle may be used (e.g., when the line is smoothed to eliminate fluctuations in local curvature). As shown along the first axis of symmetry 16, when the gap between the two sets of lines is relatively large, a large distance may occur between the two sets of lines, namely a fifth distance d ₆ . When the feature slot widths are defined, these distances may be related to the feature slot widths. For example, the feature groove width may be taken as d ₃ . Preferably, in the present embodiment, the fourth distance d ₅ From a third distance d ₄ The ratio therebetween ranges from 1.2 to 4 or from 1.2 to 3 or from 1.5 to 3.5, and the specific ratio may be 1.2, 1.5, 2.0, 2.5, etc., without limitation.

At present, the shape of the groove is a parallel straight line crossing the pre-sealing position, the length of the air guide groove is short, air guide is not smooth, and a packaging laminated material with flaws can be produced, so that the production efficiency is reduced. To solve the above-described problem, in one embodiment, as shown in fig. 3 and 4, the side walls (not shown) of the groove 120 and the side walls (not shown) of the groove 120b are provided in an arc shape, i.e., the shape of the groove 120 is sinusoidal. Alternatively, in the present embodiment, the chord height L of each arc is 0.4mm-8mm, for example, 0.4mm, 0.6mm, 0.8mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 5mm, 6mm, 7mm, 8mm, etc., without limitation herein. In addition, in this embodiment, the radius of each arc may be the same or different, which is not limited herein. Referring to fig. 4 and 6 together, fig. 6 is a schematic diagram showing the amplitude of a sinusoidal slot with a limited width. As shown in FIG. 6, L ₁ Is the outer curve height of the outside of the groove, L ₂ Is of high inner and outer chords, L ₁ And L ₂ All for measuring the maximum distance from the midpoint of the inside of the slot to the boundary defined by the outer edge. For constant groove width, use L ₂ To represent the chord height of the arc, i.e. the outer chord height plus half the groove width. The ratio between the chord height L and the second distance d3 (or the period length of the periodic pattern in the curve) ranges from 0.5 to 6 or from 0.8 to 5, and the like, which is not limited herein. Of course, in other embodiments, the shape of the groove 120 may be configured as a sinusoidal curve of periodic and/or amplitude variation, where the chord height of the arc is amplitude dependent; alternatively, the shape of the groove 120 may be set to be a non-sinusoidal curve, as shown in fig. 7, fig. 7 is an exemplary schematic diagram of the non-sinusoidal curve, and the non-sinusoidal curve may be a sawtooth curve, a triangle curve, a non-periodic curve, or the like, where the variation amplitude of the oscillation function (such as a sawtooth wave, a triangle wave, or the like) is studied; alternatively still, the shape of the grooves 120 may be configured as a spiral curve, as shown in fig. 8, with fig. 8 being a schematic illustration of a spiral curve, wherein one or two lines spiral around a portion of the elastomeric layer, thereby forming multiple lines, e.g., 7, 8, etc., in the spout area, and these lines may have a sinusoidal or other curve applied to the overall spiral or spiral shape, without limitation. A spiral groove employing a spiral curve may rotate one or more turns around the roll, and the spiral groove of this nature may have two or more parallel spiral grooves, but these spiral grooves do not form a closed loop, and the spiral groove may be interrupted by one or more bridges, interrupting the original groove, which is longer than the circumference of the roll.

Because the two adjacent grooves 120 (120 b) are arranged in a staggered manner, the grooves 120 (120 b) are arranged in a stepped staggered manner, and the two grooves 120 (120 b) are provided with the discontinuities 130 (130 b), so that after the open-pore structure is formed on the laminated material, the discontinuous design on at least one pressing groove formed on the open-pore structure can be ensured, and the deformation probability of the pressing groove can be reduced to a great extent. Moreover, the design of the arc-shaped groove can prolong the ventilation channel, so that the exhaust is thorough, and the probability of generating defective products is reduced.

In another example, referring to fig. 5, fig. 5 is an enlarged view of a portion of another embodiment of the groove of fig. 2. Specifically, the side walls (not shown) of the groove 120c are arranged in a straight line shape. Because the two adjacent grooves 120c are arranged in a staggered manner, the grooves 120c are arranged in a stepped staggered manner, and the gaps 130c are arranged between the two grooves 120c, so that after the open-pore structure is formed on the laminated material, the intermittent design on at least one pressing groove formed on the open-pore structure can be ensured, and the deformation probability of the pressing groove can be reduced to a great extent. Further, in the present embodiment, the plurality of grooves 120c includes a first symmetry axis 16 therebetween, and a first distance d between two adjacent grooves 120c located on both sides of the first symmetry axis 16 ₂ Greater than a second distance d between two adjacent grooves 120c at the remaining positions ₃ . Specifically, in the present embodiment, the plurality of grooves 120c are symmetrical about the first symmetry axis 16. Alternatively, in the present embodiment, a first distance d between two adjacent grooves 120c on either side of the first axis of symmetry 16 ₂ Is 2mm-3mm, for example, 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, etc., and is not limited herein. In the present embodiment, the second distance d between the adjacent two grooves 120c at the remaining positions ₃ Is 1mm-2.2mm, e.g., 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 2.2mm, etc., and is not limited herein.

Specifically, in the present embodiment, the diameter of the body 10 is 150mm to 350mm, for example, 150mm, 200mm, 250mm, 300mm, 350mm, etc., which is not limited herein. Alternatively, the body 10 has a diameter of 150mm-250mm, e.g., 150mm, 200mm, 250mm, etc.; alternatively, the body 10 may have a diameter of 180mm-300mm, e.g., 180mm, 200mm, 220mm, 240mm, 260mm, 280mm, 300mm, etc., and the present application is not limited thereto. Preferably, the body 10 has a diameter of 250mm.

In this embodiment, the thickness of the elastic material layer 12 is 9mm to 30mm, for example, 9mm, 10mm, 15mm, 20mm, 25mm, 30mm, etc., and the present application is not limited thereto. Alternatively, the thickness of the elastomeric layer 12 is 15mm-25mm, e.g., 15mm, 20mm, 25mm, etc.; alternatively, the thickness of the elastic material layer 12 is 9mm-21mm, for example, 9mm, 15mm, 20mm, 21mm, etc., and the present application is not limited thereto. Preferably, the thickness of the elastomeric layer 12 is 20mm.

In the present embodiment, the material of the elastic material layer 12 may be rubber, or may be other elastic materials, which is not limited herein. In this embodiment, the grooves 120 may be formed in the elastomeric layer 12 by laser cutting, molding, casting, mechanical grinding (e.g., using a rotating cutting wheel), automated or manual machining, or the like. Specifically, in the present embodiment, the hardness of the elastic material layer 12 is 60HA-90HA, for example, 60HA, 65HA, 70HA, 75HA, 80HA, 83HA, 85HA, 90HA, etc., which is not limited herein. Alternatively, the hardness of the elastomeric layer 12 is 75HA-85HA, e.g., 75HA, 80HA, 83HA, 85HA, etc., or the hardness of the elastomeric layer 12 is 64HA-88HA, e.g., 64HA, 65HA, 70HA, 75HA, 80HA, 83HA, 85HA, 88HA, etc.; alternatively, the elastomeric layer 12 may have a hardness of 70HA-84HA, e.g., 70HA, 75HA, 80HA, 83HA, 84HA, etc., which is not limited herein. The present application is not limited herein. Preferably, the elastomeric layer 12 HAs a hardness of 83HA. In this embodiment, HA represents the shore hardness, which is a reading of a value measured by a shore durometer, its unit is "degree", its description method is divided into A, D, which respectively represent different hardness ranges, the range of the shore a durometer is 0-100HA, the range of the shore D durometer is 0-100HD, and the hardness of the final elastic material layer 12 is based on the reading, which is not limited herein. Of course, in other embodiments, the press roller provided herein may be a roller without elasticity, which is not limited herein.

In addition, in the present embodiment, with continued reference to fig. 1-3, the number of grooves 120 in one ring structure 14 is 5-10, e.g., 5, 6, 7, 8, 9, 10, etc., which is not limited herein. Alternatively, the number of grooves 120 in one annular structure 14 is 7-9, e.g., 7, 8, 9, etc., and the present application is not limited thereto. Preferably, the number of grooves 120 in one ring structure 14 is 8. In the present embodiment, the width D of each groove 120 ₁ From 0.5mm to 2mm, for example, 0.5mm,1mm, 1.5mm, 2mm, etc., and are not limited herein. Optionally, the width D of each groove 120 ₁ For example, 0.8mm to 1.2mm, for example, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, etc., the present application is not limited thereto. Preferably, the width D of each groove 120 ₁ Is 1mm. Further, in the present embodiment, the depth D of each groove 120 ₂ Is 1mm to 4mm, for example, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, etc., and is not limited herein. Optionally, the depth D of each groove 120 ₂ 1.5mm to 2.5mm, for example, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.4mm, 2.5mm, etc., and are not limited herein. Preferably, the depth D of each groove 120 ₂ Is 2mm.

Referring to fig. 9-10, fig. 9 is a schematic structural view of an embodiment of the laminate of the present application, and fig. 10 is a schematic structural view of an embodiment of the open cell structure of fig. 9. The laminate comprises a core layer 20, the core layer 20 being provided with an open cell structure 200, in particular the shape of the open cell structure 200 may be circular, elliptical or irregular elliptical, without limitation. The open cell structure 200 has a continuous polymer film on the inside and outside and may also contain aluminum foil for blocking the entry of external bacteria and the like. Wherein, as shown in fig. 10, the open-cell structure 200 is provided with a plurality of press grooves 202 formed by the press rolls according to any of the above-mentioned embodiments, and in the extending direction 22 of the press grooves 202, the head and tail ends of at least one of the press grooves 202 are not communicated. That is, as shown in fig. 10, at least one of the pressing grooves 202 has a break (white portion in the drawing) between its front and rear ends, and the break is in a non-conductive state. The design that the two ends of the at least one pressing groove 202 are not communicated can reduce the deformation probability of the pressing groove 202, thereby reducing the probability of defective products. This ensures that after the open cell structure 200 is formed in the laminate, there is a discontinuous design on at least one of the press channels 202 formed in the open cell structure 200, which greatly reduces the probability of deformation of the press channels 202.

Specifically, in the present embodiment, referring to fig. 9 to 10, the number of the pressing grooves 202 intersecting with the periphery 200a of the open-pore structure 200 is greater than or equal to a predetermined number, which may be 3 or the like, which is not limited herein. The indent 202 runs through the plane of the laminate (not shown); of course, the pressing groove 202 may cover only the open-pore structure 200, which is not limited herein. As shown in fig. 10, the indent 202 is formed by the annular structure 14 formed by scheme a of fig. 2. The shape, size, etc. of the pressing groove 202 are similar to those of the groove 120 in fig. 3, and will not be described herein. The non-parallel arcuate compression slots provided herein are more easily pierced by the straw when in use by a user, and the discontinuous groove design can reduce the probability of deformation of the compression slot 202 to a large extent.

In addition, in this embodiment, referring to fig. 11-12, fig. 11 is a schematic structural view of another embodiment of the open-cell structure in fig. 9, and fig. 12 is a schematic structural view of another embodiment of the open-cell structure in fig. 9. As shown in fig. 11, the indent 202B is formed by the annular structure 14 formed by scheme B of fig. 2. The shape, size, etc. of the pressing groove 202b are similar to those of the groove 120b in fig. 4, and will not be described herein. The non-parallel arcuate compression grooves provided by the present application are more easily pierced by a straw when in use by a user. As shown in fig. 12, the indent 202C is formed by the annular structure 14 formed by the pattern C of fig. 2. The shape, size, etc. of the pressing groove 202c are similar to those of the groove 120c in fig. 5, and will not be described again. Discontinuous indent designs can greatly reduce the probability of indent 202 deformation.

In particular, in this embodiment, with continued reference to fig. 9-10, to facilitate folding into a packaging container capable of holding a liquid beverage, the laminate further includes a plurality of folds 24, the folds 24 including longitudinal folds 24a perpendicular to the length of the laminate in the length direction (not shown) of the laminate, and the score 202 being visually parallel to the longitudinal folds 24a.

Furthermore, in this embodiment, the laminate has at least two layers of polymeric material and has at least one core layer 20 within the inner layers of polymeric material. The polymer material can be one or more of linear polyethylene, low density polyethylene, high density polyethylene and metallocene polyethylene. One side of the laminate may also be provided with a layer of aluminium foil for blocking the entry of external bacteria and the like. The thickness of the aluminum foil is 20 to 60. Mu.m, for example, 20. Mu.m, 30. Mu.m, 40. Mu.m, 50. Mu.m, 60. Mu.m, etc., and is not limited thereto. Preferably, in the present embodiment, the thickness of the aluminum foil is 30-40 μm, for example, 30 μm, 35 μm, 40 μm, etc., which is not limited herein.

In this embodiment, the core layer 20 may be a single layer paper or a multi-layer paper, and the number of layers of the multi-layer paper is greater than or equal to 2, which is not limited herein. At least one side (not shown) of the core layer 20 has a coating, in particular a surface of the coating containing mineral pigment, for providing a printed layer. The laminate may also include other materials, which are not described in detail herein.

The packaging container provided by the present application is formed by folding the laminate according to any of the above embodiments, and the above packaging container can be applied to storing food such as liquid beverage. The laminate used to make the packaging container comprises an open cell structure with non-parallel curved depressions that are easier for the user to pierce by the straw when in use, with a better user experience.

In summary, unlike the prior art, the press roll provided herein is used to make a laminate, comprising: a body; the elastic material layer is arranged on the periphery of the body along the circumferential direction of the body; wherein, be provided with at least one recess on the elastic material layer, and in the extending direction of recess, the end to end both ends of recess are non-intercommunication. Through such design mode, the non-communicating design in end to end both ends of recess can reduce the probability that produces the deformation when forming the indent on laminate, and moreover, the design of arc recess can prolong the passageway of ventilating for the exhaust is thorough, and then reduces the defective rate.

The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the present application or other related technical fields are included in the scope of the patent application.

Claims

1. A press roll for making a laminate, comprising:

a body; wherein the diameter of the body is 150mm-350mm;

the elastic material layer is arranged on the periphery of the body along the circumferential direction of the body; wherein, at least one groove is arranged on the elastic material layer, and in the extending direction of the groove, the head end and the tail end of the groove are not communicated; a break is arranged between the head end and the tail end of the groove, and the length of the break is 1mm-10mm;

wherein, in the axial direction of the body, the at least one groove forms a plurality of annular structures which are arranged at intervals, and at least part of the annular structures are formed by at least two grooves which are arranged at intervals; in the same annular structure, a first distance corresponds to the space between two adjacent grooves at the middle position in the axial direction, and a second distance corresponds to the space between two adjacent grooves at the rest positions; the side wall of the groove is arc-shaped, the chord height of each arc-shaped is 0.4mm-8mm, and the ratio range between the chord height and the second distance is 0.5-6.

2. A press roll as claimed in claim 1, characterized in that,

in the axial direction, the annular structure extends around the periphery of the press roller and is perpendicular to the axis of the press roller; wherein the width of the annular structure is 15mm-40mm.

3. A press roll as claimed in claim 2, characterized in that,

the ratio of the projected surface area of the grooves on the annular structure to the surface area of the annular structure is 5% -70%.

4. A press roll as claimed in claim 1, characterized in that,

in the axial direction, adjacent discontinuities on two adjacent grooves on each annular structure are arranged in a staggered manner.

5. A press roll as claimed in claim 4, characterized in that,

the body comprises a first end part positioned in the axial direction, and adjacent discontinuities on a plurality of grooves on the continuous plurality of annular structures are arranged in a step dislocation manner in the direction away from the first end part.

6. A press roll as claimed in claim 5, characterized in that,

in the axial direction, each groove comprises a first side wall and a second side wall which are oppositely arranged, and the first side wall is close to the center of the body relative to the second side wall; wherein the interval between two adjacent first side walls is 1mm-2.2mm.

7. A press roll as claimed in claim 6, characterized in that,

the first distance is greater than the second distance.

8. A press roll as claimed in claim 7, characterized in that,

the shape of each groove is the same;

alternatively, the plurality of grooves on the same annular structure comprise a first symmetry axis, and a first distance between two adjacent grooves on two sides of the first symmetry axis is larger than a second distance between two adjacent grooves on the other positions.

9. A press roll as claimed in claim 1, characterized in that,

the thickness of the elastic material layer is 10mm-30mm, and the hardness of the elastic material layer is 60HA-90HA.

10. The press roll according to claim 1, characterized in that the number of grooves is 5-10, and/or the width of the grooves is 0.5-2 mm, and/or the depth of the grooves is 1-4 mm.

11. A laminate, comprising:

a core layer provided with an open-cell structure, wherein the open-cell structure is provided with a plurality of press grooves formed by the press roll according to any one of claims 1 to 10, and in the extending direction of the press grooves, the head and tail ends of the press grooves are not communicated.

12. The laminate of claim 11, wherein the number of said press slots intersecting the periphery of said open cell structure is greater than or equal to a predetermined number;

the indent penetrates the plane of the laminate; and/or the press groove only covers the open pore structure.

13. The laminate of claim 11, further comprising a plurality of folds;

in the length direction of the laminate, the folds comprise longitudinal folds perpendicular to the length direction of the laminate, and the indent is visually parallel to the longitudinal folds.

14. A packaging container, characterized in that it is formed by folding a laminate according to any one of claims 11-13.