A pull-tab bottle cap and a processing method thereof

Abstract

The application discloses a pull ring type bottle cap and a processing method thereof, and belongs to the technical field of bottle cap processing. The pull ring type bottle cap comprises a bottle cap body and a pull ring connected to one side of the bottle cap body. A sealing gasket is arranged on the inner side of the bottle cap body. An ink layer, which can be torn and connected with the sealing gasket, is further printed on the inner side of the bottle cap body. The ink layer is a circle composed of an outer arc surface ink layer, an inner arc surface ink layer and an arc-shaped gap. The bottle cap body is pulled open through the pull ring, and the sealing gasket ensures the sealing property of the bottle cap body and a bottle mouth. The ink layer is located between the bottle cap body and the sealing gasket, can reduce the adhesion between the sealing gasket and the bottle cap body, can increase the power application range of a high-frequency heating device, and makes the sealing gasket better adhere to the bottle cap body. The application realizes the sealing of the bottle mouth through the pull ring type bottle cap, can quickly open the bottle mouth, simultaneously improves the adhesion qualified rate of the sealing gasket in the bottle cap, and further saves materials and reduces costs.

Description

Technical Field

[0001] This invention relates to a pull-ring bottle cap and its processing method, belonging to the field of bottle cap processing technology. Background Technology

[0002] In existing technology, the processing method for bottle caps involves creating a patterned aluminum sheet through external priming, internal coating, external printing, external varnishing, and internal printing. The sheet is then cut into the planar shape of the bottle cap using a wave cutter, stamped to form the initial shape, and finally sealed with a heat-sealing gasket and pull ring to create a bottle cap with a pull ring. However, this processing method has the following drawbacks:

[0003] 1. When the TPE material (or PE material, silicone material, etc.) inside the bottle cap is heated by a high-frequency heating device and compressed by a stamping device to form a sealing gasket, the high-frequency heating power of the high-frequency heating device needs to be adjusted in real time. If the adjustment is not correct, the sealing gasket may not adhere tightly enough and fall off, or it may adhere too much and make the bottle cap difficult to open. The entire production process is repetitive, troublesome, time-consuming, and labor-intensive. 2. The pass rate is not high. The adhesion of the sealing gasket directly affects the production efficiency and ease of opening the bottle cap. In existing processing methods, the sealing gasket is always prone to excessive adhesion. 1. Too high or too low a pressure setting may result in the sealing gasket falling off when the bottle is opened, while too high a pressure setting may prevent the sealing gasket from being pulled open and make it impossible to see the QR code information on the inside. 2. The bottle cap may be difficult to open, which may cause the pull ring to break, affecting the user experience. 3. When the adhesion of the sealing gasket is just right, it can make a crisp "pop" sound when opening a carbonated beverage or beer bottle. In this case, the TPE material (or PE material, silicone material, etc.) needs to meet the standards for various data when forming the sealing gasket under heating and compression, such as: high frequency heating power and the adhesion degree of the sealing gasket.

[0004] Therefore, it is necessary to provide a new method for processing bottle caps to overcome the shortcomings of the existing technology. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and to provide a pull-ring bottle cap and its processing method.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0007] A pull-ring bottle cap includes a bottle cap body and a pull ring connected to one side of the bottle cap body. A sealing gasket is installed on the inner side of the bottle cap body. The bottle cap body is characterized by having a sealing gasket installed on the inner side, and an ink layer printed on the inner side of the bottle cap body that is tear-off and connectable to the sealing gasket. The ink layer is a circle composed of an outer arc-shaped ink layer, an inner arc-shaped ink layer, and an arc-shaped notch. The outer arc-shaped ink layer is an arc surface formed by a first arc-shaped edge and a second arc-shaped edge concentrically located, and two connecting segments connecting the first arc-shaped edge and the second arc-shaped edge. The first arc-shaped edge and the second arc-shaped edge are arranged alternately in the same direction, and the radius of the first arc-shaped edge is greater than the radius of the second arc-shaped edge.

[0008] The inner arc surface ink layer is an arc surface formed by the second arc edge and the third arc edge. The third arc edge is away from the pull ring, and the two ends of the third arc edge are respectively connected to the two connecting segments. The third arc edge and the two connecting segments are on the same arc line.

[0009] The arc-shaped notch is an arc surface formed by the third arc-shaped side, the two connecting segments, and the fourth arc-shaped side. The fourth arc-shaped side and the first arc-shaped side can form a circle. The central angle θ of the fourth arc-shaped side is less than 180 degrees and greater than 45 degrees.

[0010] The beneficial effects of this invention are as follows: the bottle cap body is opened by pulling the ring, and the sealing gasket ensures the seal between the bottle cap body and the bottle mouth; the ink layer is located between the bottle cap body and the sealing gasket, and the ink can reduce the adhesion between the sealing gasket and the bottle cap body. The ink layer is a circle composed of an outer arc surface ink layer, an inner arc surface ink layer, and an arc-shaped notch, wherein the arc-shaped notch is not covered by ink. High adhesion between the sealing gasket and the arc-shaped notch can be achieved under both low and high heating power of the high-frequency heating equipment. The outer arc surface ink layer and the inner arc surface ink layer covered by ink have low adhesion to the sealing gasket under high-power heating and stamping of the high-frequency heating equipment. Therefore, in the process of installing the sealing gasket on the ink layer inside the bottle cap body, it can adapt to multiple heating power ranges of the high-frequency heating equipment. That is, under high-power heating and stamping, the adhesion between the sealing gasket 2 and the bottle cap body 1 will not be too high; the entire pull-ring bottle cap can achieve quick opening of the bottle mouth, ensuring overall efficiency, quality, and consumer experience. The central angle θ of the fourth arc edge is less than 180 degrees and greater than 45 degrees. Within this range, the arc notch also changes accordingly. At the same time, the arc notch is located at the end away from the pull ring. This ensures that the sealing gasket maintains a tight connection at the arc notch at the rear end of the pull ring when it is pulled open.

[0011] Overall, the ink layer expands the applicable range of heating power for high-frequency heating equipment, eliminating the need for manual adjustment of heating power for each batch in real time, reducing manpower consumption, and improving the sealing pass rate between the bottle cap body and the sealing gasket.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the coverage rate of the ink pattern on the outer arc surface ink layer is 100%, the coverage rate of the ink pattern on the inner arc surface ink layer is 10%-80%, and the coverage rate of the ink pattern on the arc-shaped notch is zero.

[0014] The beneficial effects of adopting the above-mentioned further solution are as follows: the outer arc surface ink layer is fully covered with printed ink, which facilitates separation from the bottle mouth during the pull-tab opening stage. It also facilitates the separation of the sealing gasket from the inner side of the bottle cap body. The dot-matrix ink layer on the inner arc surface ensures that the adhesion between the sealing gasket and the inner arc surface ink layer is higher than that of the outer ring. At the same time, it improves the adhesion between the sealing gasket and the inner side of the bottle cap body. After the bottle cap is opened, the sealing gasket separates from the bottle cap body first from the outer arc surface ink layer, and then separates along the inner arc surface ink layer under the action of pulling force. This process ensures the sealing effect of the sealing gasket and the ease of opening the cap.

[0015] Furthermore, the inner arc surface ink layer has a grid structure formed by multiple vertically arranged halftone dots and multiple horizontally arranged halftone dots with equal spacing. Multiple halftone dots are arranged sequentially on each halftone dot line, and each halftone dot is covered with ink.

[0016] The beneficial effects of adopting the above-mentioned further solution are: the ink layer on the inner arc surface is a dot-matrix ink pattern, and the grid structure formed by multiple vertically arranged dot lines and multiple horizontally arranged dot lines with equal spacing can maintain the uniformity of the adhesion of the sealing gasket within the range of the ink layer on the inner arc surface, ensuring that the adhesion of the sealing gasket in the bottle cap is kept within a suitable range.

[0017] Furthermore, the shape of the dots can be any one of square, circle, and triangle, and 10 to 175 dots are arranged on each dot line.

[0018] The beneficial effects of adopting the above-mentioned further solution are: the dot pattern of the ink layer on the inner arc surface, with 10-175 dots arranged on each dot line, can effectively improve the adhesion effect, ensure the applicable range of the high-frequency heating power of the high-frequency heating equipment, and control it within a large range. The shape of the dots can be any one of square, circle, and triangle, which can maintain the adhesion effect of the ink area and non-ink area of ​​the dots to the sealing gasket and keep the adhesion effect uniform.

[0019] Furthermore, the outer side of the bottle cap body is provided with tear lines for separating the pull ring from the sealing gasket. There are two tear lines, which are symmetrically arranged on the outer side of the bottle cap body along the pull ring, and the two tear lines extend around both sides of the pull ring to the end of the bottle cap body away from the pull ring.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the tear line makes it easy for the bottle cap body to tear along the tear line when the pull ring is pulled, thus making it easier for the bottle cap to fall off the bottle mouth.

[0021] Furthermore, the outer surface of the bottle cap body is printed with a pattern, and the inner ink layer is also printed with a QR code.

[0022] The beneficial effects of adopting the above-mentioned further solutions are: the patterns printed on the outer side are provided by the merchants, the patterns enhance the appeal of the products, and the QR codes increase the interactivity between merchants, products, and users.

[0023] On the other hand, the present invention provides a method for processing a pull-tab bottle cap, which forms a pull-tab bottle cap as claimed in any one of claims 1-6, comprising the steps of:

[0024] Step 1: Apply base coat

[0025] Take an aluminum sheet, uniformly coat it with polypropylene glycol on one surface of the aluminum sheet to form a first polypropylene glycol film, and then bake it to obtain an outer base aluminum sheet;

[0026] Step 2: Internal application

[0027] Take the outer base aluminum sheet obtained in step 1, and uniformly coat it with polypropylene glycol on the other surface of the outer base aluminum sheet opposite to the first polypropylene glycol film to form a second polypropylene glycol film. Then bake it to obtain an inner coated aluminum sheet.

[0028] Step 3: External Printing

[0029] The ink pattern required for external printing is printed onto a film, and then printed onto the first polypropylene glycol film of the inner-coated aluminum sheet obtained in step 2, to obtain an aluminum sheet with an externally printed ink pattern.

[0030] Step 4: Apply varnish

[0031] Take the aluminum sheet with the externally printed ink pattern obtained in step 3, uniformly coat it with polypropylene glycol to form a third polypropylene glycol film, and then bake the third polypropylene glycol film to obtain an aluminum sheet with external varnish.

[0032] Step 5: Internal Printing

[0033] First, the ink layer pattern is printed onto another film. Then, the film is printed onto the second polypropylene glycol film of the outer varnish aluminum sheet obtained in step 4. The film is then baked to obtain an aluminum sheet with an inner ink layer pattern.

[0034] Step 6: Making the bottle cap

[0035] Take the aluminum sheet with the ink layer pattern obtained in step 5, process it into a bottle cap body semi-finished product, then stamp TPE material on the ink layer inside the bottle cap body semi-finished product to form a sealing gasket, and then process a pull ring on the arc-shaped notch side of the bottle cap body semi-finished product away from the ink layer to obtain a pull ring bottle cap finished product.

[0036] The principle of this invention is:

[0037] In steps 1 and 2 of the present invention, the first polypropylene glycol film and the second polypropylene glycol film formed are both hydrophobic and oleophilic, which is beneficial for ink printing on them and maintaining the stability and gloss of the pattern.

[0038] In step 3 of this invention, the pattern is printed using a film. The film's stable performance, ink affinity, and high clarity can improve the fineness, vibrancy, and clarity of the pattern, ensuring a firm and uniform coating thickness.

[0039] In step 4 of the present invention, covering with a third polypropylene glycol film can further protect the pattern on the outer side of the bottle cap body from contact with air, maintain the long-term stability and vibrancy of the pattern, and prevent it from becoming blurred by oxidation.

[0040] In step 5 of this invention, the inner printed ink layer pattern is a circle composed of an outer arc-shaped ink layer, an inner arc-shaped ink layer, and an arc-shaped notch. The arc-shaped notch is located at the rear end of the bottle cap pull-open end, which can maintain the adhesion of the sealing gasket under the original high-frequency heating power, thereby maintaining the original sealing performance during the sealing of the bottle mouth. During the bottle cap pull-opening process, the sealing gasket of the front outer arc-shaped ink layer and the inner arc-shaped ink layer has low adhesion, making it easy to pull open. The sealing gasket of the rear end has strong adhesion, making it less likely to fall off, and maintaining the sealing stability of the bottle mouth. The outer arc-shaped ink layer is fully covered with ink, and the inner arc-shaped ink layer is covered with dot-matrix pattern ink. Different ink ratios and the density of the number of dots on the dot pattern in the inner arc-shaped ink layer can achieve different degrees of adhesion of the sealing gasket, thereby producing a bottle cap that is more suitable for pulling open.

[0041] In step 6 of the present invention, a sealing gasket formed by stamping TPE material is placed in the ink layer pattern on the inner side of the bottle cap to cover the entire pattern. The adhesion between the ink layer pattern and the sealing gasket can be changed, thereby ensuring that the two are loose in the front and tight in the back, so as to facilitate opening the bottle cap.

[0042] In summary, the bottle cap is opened by pulling the ring from one end of the bottle opening. The tightness of the adhesion between the sealing gasket and the bottle cap affects the ease of opening the cap and the seal between the cap and the bottle opening. The adhesion between the sealing gasket and the bottle cap is related to two factors. First, the heating power of the high-frequency heating device. If it is too high, it will result in a high seal, making it difficult to open the bottle cap. If it is too low, it will result in a poor seal. Second, the adhesion coefficient between the sealing gasket and the bottle cap contact surface. A high adhesion coefficient will result in an excessively high seal, making it difficult to open the bottle cap. A low adhesion coefficient will result in a weak adhesion between the sealing gasket and the inner side of the bottle cap body, making the bottle cap easy to fall off. Therefore, it is necessary to ensure that the heating power of the high-frequency heating device and the adhesion coefficient between the sealing gasket and the bottle cap contact surface are within a suitable range, which can be improved by using the pattern of the ink layer.

[0043] This invention alters the adhesion between the gasket and the seal by creating a dotted pattern in the ink layer on the inner surface of the bottle cap. The more ink is applied, the lower the adhesion of the seal. The ink pattern ensures that the seal adheres less to the patterned area near the pull end of the bottle cap, while the curved notch further away from the pull end has high adhesion due to the lack of ink coverage. This design facilitates opening the bottle cap, and because the curved notch of the seal remains attached to the bottle cap, the seal between the bottle cap and the bottle opening is not affected.

[0044] The outer arc surface ink layer is fully covered with ink, while the inner arc surface ink layer is covered with a dot-matrix pattern ink layer. This design improves the adaptability of the sealing gasket under high-power heating. During stamping, it increases the yield rate of qualified sealing gaskets adhering to the bottle cap, thereby saving materials and reducing costs. At the same time, the dot-matrix pattern ink layer on the inner arc surface can be adjusted according to the required percentage of ink area and inner circle area, thus facilitating targeted sealing of bottle openings under different conditions (such as season, temperature, and region). The full ink coverage on the outer arc surface and the dot-matrix pattern ink layer on the inner arc surface also facilitates the gradual lifting of the sealing gasket from the opening end along the inner arc surface ink layer during the opening process, revealing the internal QR code, thus improving the user's interaction with the product during the bottle opening process.

[0045] The beneficial effects of the bottle cap processing method of the present invention are:

[0046] 1. Using the method of the present invention, a bottle cap with stable sealing performance, easy opening, and high yield can be prepared.

[0047] 2. The processing method of the present invention is simple, easy to operate, low in cost, and has a broad market prospect, making it suitable for large-scale promotion and application.

[0048] Based on the above technical solution, the present invention can be further improved as follows.

[0049] Furthermore, in step 1, the areal density of the first polypropylene glycol film is 3 g / m³. 2 -5g / m 2 The baking temperature is 175℃, and the baking time is 10-12 minutes; in step 2, the areal density of the second polypropylene glycol film is 6 g / m³. 2 -7g / m 2 The baking temperature is 200℃ and the baking time is 10-12 minutes.

[0050] The further beneficial effects of using the above parameters are: the aluminum sheet can be coated with an outer layer to facilitate the next step of ink printing; and the inner side of the aluminum sheet can be coated with a propylene glycol film to ensure that the subsequent two layers of pattern printing can maintain the brightness and gloss of the pattern.

[0051] Among them, polypropylene glycol is specified as P-XF151701.

[0052] Furthermore, in step 3, the printing method is single-color multiple printing; in step 4, the areal density of the third polypropylene glycol film is 5 g / m³. 2 -6g / m 2 The baking temperature is 190℃ and the baking time is 10-12 minutes.

[0053] The further beneficial effects of the above are: film printing has the characteristics of stable performance, ink affinity, and high clarity. When printing patterns, printing in blocks according to different colors can ensure that the colors between patterns are more vivid and that adjacent colors will not mix; the pattern is printed on the first polypropylene glycol film, and the third polypropylene glycol film covers the first polypropylene glycol film with the pattern printed on it, and the pattern is further protected by the third polypropylene glycol film. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the pull-ring bottle cap structure of the present invention;

[0055] Figure 2 This is a schematic diagram of the front structure of the pull-ring bottle cap of the present invention;

[0056] Figure 3 This is a sectional view of the side structure of the pull-ring bottle cap of the present invention;

[0057] Figure 4 This is a schematic diagram of the tear line structure in Embodiment 5 of the present invention;

[0058] Figure 5 This is a schematic diagram of the ink layer partitioning in Embodiment 1 of the present invention;

[0059] Figure 6This is a schematic diagram of the ink layer structure in Embodiment 1 of the present invention;

[0060] Figure 7 This is a schematic diagram of Embodiment 8 of the present invention;

[0061] Figure 8 This is a schematic diagram of Embodiment 9 of the present invention;

[0062] Figure 9 This is a schematic diagram of Embodiment 10 of the present invention;

[0063] Figure 10 This is a schematic diagram of Comparative Example 1 of the present invention;

[0064] Figure 11 This is a schematic diagram of Comparative Example 2 of the present invention;

[0065] Figure 12 This is a schematic diagram of Comparative Example 3 of the present invention;

[0066] Figure 13 This is a schematic diagram of Comparative Example 4 of the present invention.

[0067] The attached diagram lists the components represented by each number as follows:

[0068] 1. Bottle cap body; 11. Tear line; 12. Ink layer; 121. Outer arc surface ink layer; 121a. First arc edge; 121b. Second arc edge; 121c. Third arc edge; 121d. Connecting section; 121f. Fourth arc edge; 122. Inner arc surface ink layer; 123. Arc notch; 2. Sealing gasket; 3. Pull ring. Detailed Implementation

[0069] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0070] Example 1, as Figure 1-6 As shown, an embodiment of a pull-ring bottle cap disclosed in this invention includes:

[0071] The bottle cap body 1 and the pull ring 3 connected to one side of the bottle cap body 1 are provided. A sealing gasket 2 is installed on the inner side of the bottle cap body 1. An ink layer 12 that can be torn and connected to the sealing gasket 2 is also printed on the inner side of the bottle cap body 1. The ink layer 12 is a circle composed of an outer arc surface ink layer 121, an inner arc surface ink layer 122 and an arc-shaped notch 123. The outer arc surface ink layer 121 is an arc surface formed by a first arc edge 121a and a second arc edge 121b with the same center and two connecting segments 121d for connecting the first arc edge 121a and the second arc edge 121b. The first arc edge 121a and the second arc edge 121b are arranged alternately in the same direction, and the radius of the first arc edge 121a is larger than the radius of the second arc edge 121b.

[0072] The inner arc surface ink layer 122 is an arc surface surrounded by the second arc edge 121b and the third arc edge 121c. The third arc edge 121c is far away from the pull ring 3, and the two ends of the third arc edge 121c are respectively connected to the two connecting segments 121d. The third arc edge 121c and the two connecting segments 121d are on the same arc line.

[0073] The arc-shaped notch 123 is an arc surface formed by the third arc-shaped side 121c, the two connecting segments 121d, and the fourth arc-shaped side 121f. The fourth arc-shaped side 121f and the first arc-shaped side 121a can be combined to form a circle. The central angle θ of the fourth arc-shaped side 121f is less than 180 degrees and greater than 45 degrees.

[0074] Specifically, the inner side of the bottle cap body 1 is printed with an ink layer 12, and the sealing gasket 2 is bonded to the inner side of the bottle cap body 1 through the ink layer 12. The outer side of the bottle cap body 1 is provided with a pull ring 3 for opening the bottle mouth. The ink layer pattern ink layer 12 consists of an outer arc surface ink layer 121, an inner arc surface ink layer 122, and an arc-shaped notch 123. The outer arc surface ink layer 121 and the inner arc surface ink layer 122 are printed with ink, and the arc-shaped notch 123 is an ink-free area. The central angle θ of the fourth arc side 121f is less than 180 degrees and greater than 45 degrees.

[0075] It should be understood that the bottle cap body 1 is used to seal and snap onto the mouth of a beer or beverage bottle. The sealing gasket 2 is used to improve the seal at the bottle mouth, and the pull ring 3 is used to pull open the bottle cap from the side of the bottle cap body 1, thereby opening the bottle mouth. The adhesion of the sealing gasket 2 to the bottle cap body 1 directly affects its overall seal at the bottle mouth. In this field, the sealing gasket 2 is formed by high-frequency heating using a high-frequency heating device and compression molding using a stamping device. Therefore, when the output power of the high-frequency heating device is too high, the sealing gasket 2 will adhere more tightly, making it difficult to open the bottle mouth; when the output power of the high-frequency heating device is too low, the sealing gasket 2 will not adhere tightly, resulting in a less sealed bottle mouth. If the seal is not tight, the bottle cap may easily fall off. Therefore, when the ink layer 12 is located between the bottle cap body 1 and the sealing gasket 2, the ink can reduce the adhesion between the sealing gasket 2 and the bottle cap body 1. Thus, during the process of installing the sealing gasket 2 on the inner side of the bottle cap body 1, it can adapt to multiple heating power ranges of the high-frequency heating equipment. That is, under high-power heating and stamping, the adhesion between the sealing gasket 2 and the bottle cap body 1 will not be too high or too low. The entire pull-ring bottle cap can achieve quick opening of the bottle mouth while ensuring overall sealing. The central angle θ of the fourth arc edge 121f in the range of 45°-180° can keep the front-end pulling force of the bottle cap not high during the opening stage.

[0076] The ink layer 122 on the inner arc surface and the ink layer 121 on the outer arc surface can reduce the adhesion between the sealing gasket 2 and the bottle cap body 1, while the uninked arc-shaped notch 123 retains its original easy-to-adhere characteristics. In this way, under the stamping of the high-frequency heating equipment, both low-power and high-power stamping can achieve high adhesion between the sealing gasket 2 and the arc-shaped notch 123, and low adhesion between the sealing gasket 2 and the inner arc surface ink layer 122 and the outer arc surface ink layer 121. Therefore, the power range of the high-frequency heating equipment is greatly expanded, and within its power range, the adhesion between the sealing gasket 2 and the inner side of the bottle cap body 1 can maintain a high yield. Overall, the ink layer 12 increases the applicable range of the high-frequency heating power of the high-frequency heating equipment, eliminating the need for manual real-time batch-specific adjustments.

[0077] Preferably, the ink layer 12 is located at the center of the inner side of the bottle cap body 1.

[0078] Preferably, the area of ​​the ink layer 12 is smaller than the area of ​​the sealing gasket 2 and is located within the coverage area of ​​the sealing gasket 2.

[0079] Preferably, the ink layer 12 is a circle composed of an outer arc surface ink layer 121, an inner arc surface ink layer 122, and an arc-shaped notch 123. The outer arc surface ink layer 121 has an annular notch shape, and the inner arc surface ink layer 122 has a circular notch shape. The two connecting segments 121d coincide with the extension line of the third arc edge 121c.

[0080] Preferably, the center of the third arc-shaped side 121c in the arc-shaped notch 123 is located exactly in the middle of the fourth arc-shaped side 121f.

[0081] Preferably, the sealing gasket 2 can be made of materials such as TPE, PE, and silicone.

[0082] Based on Example 1, Example 2: as follows Figure 6 As shown, the coverage of the ink pattern on the outer arc surface ink layer 121 is 100%, the coverage of the ink pattern on the inner arc surface ink layer 122 is 10%-80%, and the coverage of the ink pattern on the arc-shaped notch 123 is zero.

[0083] It should be understood that the outer arc surface ink layer 121 is completely printed with ink, which facilitates the easy separation of the sealing gasket 2 part containing the outer arc surface ink layer 121 from the bottle mouth during the pull ring 3 pulling stage. The coverage rate of the ink pattern on the inner arc surface ink layer 122 is 10%-80%, which ensures that the adhesion between the sealing gasket 2 and the inner arc surface ink layer 122 is higher than that between the outer arc surface ink layer 121, thereby improving the adhesion between the sealing gasket 1 and the inner center of the bottle cap body 2.

[0084] Preferably, the ratio of the ink coverage area to the non-covered area of ​​the inner arc surface ink layer 122 is adjustable in the range of 10%-80%. Different ratios can be used according to different seasons, climates or temperatures of the beverage bottle to ensure that the pull-ring bottle cap can effectively seal the bottle mouth. In high-temperature seasons, the ratio is reduced to improve the adhesion between the sealing gasket 1 and the inner side of the bottle cap body 2, and vice versa in low-temperature seasons.

[0085] Based on Example 2, Example 3: as follows Figure 6 As shown, the inner arc surface ink layer 122 has a grid structure formed by multiple vertically arranged halftone dots and multiple horizontally arranged halftone dots with equal spacing. Multiple halftone dots are arranged sequentially on each halftone dot line, and each halftone dot is covered with ink.

[0086] It should be understood that the inner arc surface ink layer 122 is a dot-matrix ink pattern. The grid structure formed by multiple vertically arranged dot lines with equal spacing and multiple horizontally arranged dot lines with equal spacing can maintain the uniformity of the adhesion effect of the sealing gasket 2 within the inner arc surface ink layer 122.

[0087] Based on Example 3, Example 4: as follows Figure 6 As shown, the shape of the dots can be any of squares, circles, and triangles, with 10 to 175 dots arranged on each dot line.

[0088] It should be understood that the dot pattern of the ink layer 122 on the inner arc surface, with 10 to 175 dots arranged on each dot line, can effectively improve the adhesion effect and ensure that the applicable range of the heating power of the high-frequency heating equipment is within a large range; the shape of the dots is any one of square, circle and triangle, which can keep the adhesion effect of the ink area and non-ink area of ​​the dots on the sealing gasket 2 uniform.

[0089] Preferably, the inner arc surface ink layer 122 is formed by the intersection of equally spaced vertically arranged halftone dots and equally spaced horizontally arranged halftone dots within the range of 10*10 to 175*175.

[0090] Preferably, the shape of the dots can also be other shapes.

[0091] Based on Example 1, Example 5: as follows Figure 4 As shown, the outer side of the bottle cap body 1 is also provided with tear lines 11 for separating the pull ring 3 from the sealing gasket 2. There are two tear lines 11, which are symmetrically arranged on the outer side of the bottle cap body 1 along the pull ring 3, and the two tear lines 11 extend around both sides of the pull ring 3 to the end of the bottle cap body 1 away from the pull ring 3.

[0092] It should be understood that the tear line 11 is a etched line on the outer side of the bottle cap body 1. The thickness of the bottle cap body 1 where the tear line 11 is located is less than the thickness of the rest of the bottle cap body 1. When the pull ring 3 is pulled, the bottle cap body 1 can be quickly torn along the tear line 11, thus facilitating the bottle cap to fall off the bottle mouth.

[0093] Based on Example 1, Example 6: as follows Figure 1-2 As shown, the outer side of the bottle cap body 1 is printed with a pattern, and the inner ink layer 12 is also printed with a QR code.

[0094] It should be understood that printing patterns on the outer side of the bottle cap body 1 can enhance the product's appeal, and printing QR codes makes it convenient for users to scan with their mobile phones, which can increase the interaction between merchants, products, and users.

[0095] Preferably, the QR code is formed by laser printing.

[0096] Preferably, the outer side of the bottle cap body 1 is printed with patterns that are product information or promotional patterns provided by the merchant.

[0097] Example 7, as Figure 7 As shown:

[0098] The processing method for the above-mentioned pull-tab bottle cap includes the following steps:

[0099] Step 1: Apply base coat

[0100] Take an aluminum sheet and uniformly coat one of its surfaces with polypropylene glycol to form a first polypropylene glycol film. The thickness of the first polypropylene glycol film is 3 g / m². 2 Then bake it dry to obtain an outer base aluminum sheet that can be printed with patterns;

[0101] Step 2: Internal application

[0102] Take the aluminum sheet obtained in step 1, and uniformly coat it with polypropylene glycol on the other surface opposite to the first polypropylene glycol film to form a second polypropylene glycol film with a thickness of 6 g / m. 2 Then, it is baked at 200℃ to obtain an inner-coated aluminum sheet that can be printed with patterns;

[0103] Step 3: External Printing

[0104] Select the pattern to be used on the outer base and print it onto the film. On the first polypropylene glycol film, print the ink pattern through the mold made of the film. When printing the ink, use single color multiple printing. For patterns with multiple colors, print one color first, and then print the other colors in sequence to finally obtain the outer printed aluminum sheet.

[0105] Step 4: Apply varnish

[0106] Take the externally printed aluminum sheet obtained in step 3, and uniformly coat it with polypropylene glycol on the ink pattern to form a third polypropylene glycol film with a thickness of 5 g / m. 2 Then bake for 10 minutes to obtain an aluminum sheet with an outer varnish;

[0107] Step 5: Internal Printing

[0108] First, the pattern of ink layer 12 is printed onto another film. Then, this film is printed onto the third polypropylene glycol film of the outer varnish aluminum sheet obtained in step 4. After baking for 10 minutes, an aluminum sheet with the pattern of ink layer 12 printed on the inside is obtained. The central angle θ of the fourth arc edge 121f is 83.7°. The ink layer 121 on the outer arc surface is fully covered, and the ink layer 122 on the inner arc surface is covered with a dotted pattern. A grid structure is formed by 60 vertically arranged halftone dots and 60 horizontally arranged halftone dots with equal spacing. Multiple halftone dots are arranged sequentially on each halftone dot line, and each halftone dot is covered with an ink pattern. The area of ​​ink and the density ratio of the total area of ​​the ink layer 122 on the inner arc surface are 50%. A QR code is laser-printed on the ink layer 12.

[0109] Step 6: Making the bottle cap

[0110] Take the aluminum sheet with the ink layer 12 pattern obtained in step 5 and process it into a bottle cap body 1 semi-finished product. Then, heat the TPE material on the ink layer 12 inside the bottle cap body 1 semi-finished product using a high-frequency heating device to make the TPE material become a sealing gasket 2 and fit tightly against the inside of the bottle cap. The arc-shaped notch 123 of the ink layer 12 pattern is located at the end of the pull ring 3 interface. Finally, open the pull ring hole on the semi-finished cap, inject HDTPE material into the pull ring hole, and form it by a pull ring machine to finally obtain the pull ring cap finished product.

[0111] The bottle cap obtained in Example 7 was installed to seal the bottle mouth. For the sealed bottle cap, a pull-open test was conducted, in which the high-frequency heating power range was 20%, 50%, and 80% of the heating power.

[0112] Data is shown in Table 1: (Unit: N)

[0113] Table 1

[0114]

[0115]

[0116] As shown in Table 1, the central angle θ of the fourth arc-shaped edge 121f in the arc-shaped notch 123 of the ink layer 12 pattern is 83.7°, and the dot arrangement is 60 lines * 60 lines. The density ratio of the ink area in the inner arc surface ink layer 122 to the total area of ​​the inner arc surface ink layer 122 is less than 50%. In multiple heating power ranges of high-frequency heating power, the pass rate can be maintained at a high level. At the same time, the front cap has a small opening force, making it easy and convenient to open. The rear sealing gasket 2 has a large pulling force, which effectively ensures the high adhesion of the sealing gasket 2 and prevents it from falling off.

[0117] Example 8, as Figure 8 As shown

[0118] The structure of the pull-ring bottle cap in this embodiment is the same as that in Embodiment 1.

[0119] The processing method of the pull-ring bottle cap in this embodiment includes the following steps:

[0120] Steps 1-4: Same as in Example 1.

[0121] Step 5: Internal Printing

[0122] First, the pattern of ink layer 12 is printed onto another film. Then, this film is printed onto the third polypropylene glycol film of the outer varnish aluminum sheet obtained in step 4. After baking for 10 minutes, an aluminum sheet with ink layer 12 printed on the inside is obtained. The central angle θ of the fourth arc edge 121f in the arc notch 123 of the ink layer 12 pattern is 83.7°. The ink layer 121 on the outer arc surface is fully covered, and the ink layer 122 on the inner arc surface is covered with a dot pattern. A grid structure is formed by 60 vertically arranged halftone dots and 60 horizontally arranged halftone dots with equal spacing. Multiple halftone dots are arranged sequentially on each halftone dot line, and each halftone dot is covered with an ink pattern. The area of ​​ink and the density ratio of the total area of ​​the ink layer 122 on the inner arc surface are 80%. A QR code is laser printed on the ink layer 12.

[0123] Step 6, make the bottle cap: same as in Example 1.

[0124] The bottle cap obtained in Example 8 was installed to seal the bottle mouth. For the sealed bottle cap, a pull-open test was conducted, in which the high-frequency heating power range was 20%, 50%, and 80% of the heating power.

[0125] The bottle caps obtained in the above embodiments were used for sealing the bottle mouth. A pull-open test was then conducted on the sealed bottle caps, and the data is shown in Table 2 (unit: N).

[0126] Table 2

[0127]

[0128] As shown in Table 2, the central angle θ of the fourth arc-shaped edge 121f in the arc-shaped notch 123 of the ink layer 12 pattern is 83.7°, and the dot arrangement is 60 lines. When the density ratio of the ink area in the inner arc surface ink layer 122 to the total area of ​​the inner arc surface ink layer 122 is 80%, the pass rate remains at a high level in multiple ranges of high-frequency heating power. That is, under the above conditions, the adaptability of the stamped sealing gasket is large, and the opening force of the front cap is greater than that of Example 1, making it relatively easy to open. The pulling force of the rear sealing gasket 2 is also greater than that of Example 1, maintaining the high adhesion and sealing performance of the sealing gasket. However, compared with the inner arc surface ink layer 122 where the ink area density ratio is 50%, the high-frequency heating power needs to be relatively increased.

[0129] Example 9, as Figure 9 As shown

[0130] The structure of the pull-ring bottle cap in this embodiment is the same as that in Embodiment 1.

[0131] The processing method of the pull-ring bottle cap in this embodiment includes the following steps:

[0132] Steps 1-4: Same as in Example 1.

[0133] Step 5: Internal Printing

[0134] First, the pattern of ink layer 12 is printed onto another film. Then, this film is printed onto the third polypropylene glycol film of the outer varnish aluminum sheet obtained in step 4. After baking for 10 minutes, an aluminum sheet with the pattern of ink layer 12 printed on the inside is obtained. The central angle θ of the fourth arc edge 121f is 120°. The ink layer 121 on the outer arc surface is fully covered, and the ink layer 122 on the inner arc surface is covered with a dot pattern. A grid structure is formed by 60 vertically arranged dot lines and 60 horizontally arranged dot lines with equal spacing. Multiple dots are arranged sequentially on each dot line, and each dot is covered with an ink pattern. The area of ​​the ink layer accounts for 50% of the total area of ​​the ink layer 122 on the inner arc surface. A QR code is laser-printed on the ink layer 12.

[0135] Step 6, Making the bottle cap: Same as in Example 1

[0136] The bottle cap obtained in Example 8 was installed to seal the bottle mouth. For the sealed bottle cap, a pull-open test was conducted, in which the high-frequency heating power range was 20%, 50%, and 80% of the heating power.

[0137] The bottle caps obtained in the above embodiments were used for sealing the bottle mouth. A pull-open test was then conducted on the sealed bottle caps, and the data are shown in Table 3 (unit: N).

[0138] Table 3

[0139]

[0140] As shown in Table 3, the arc-shaped notch 123 in the ink layer 12 corresponds to a center angle of 120° for the outer arc surface ink layer 121, and the dot arrangement is 60 lines. When the ink area of ​​the inner arc surface ink layer 122 accounts for 50% of the total area of ​​the inner arc surface ink layer 122, the pass rate remains at a high level in multiple heating power ranges of high-frequency heating. That is, under the above conditions, the stamping sealing gasket has a wide range of applicability. At the same time, the opening force of the front cap is roughly the same as that of Example 1, and it is still relatively easy to open. Due to the larger arc-shaped notch 123, the rear end sealing gasket 2 has a larger pulling force than that of Example 1, maintaining the high adhesion and sealing performance of the sealing gasket. However, compared with the inner arc surface ink layer 122 in Example 2 where the ink area density accounts for 80%, the high-frequency heating power needs to be relatively reduced.

[0141] Comparative Example 1, such as Figure 10 As shown:

[0142] The difference between Comparative Example 1 and Example 1 is that the pattern on the ink layer 12 is a circular pattern of the same size; all other aspects are the same. Specifically, Comparative Example 1 includes the following steps:

[0143] Steps 1-4: Same as in Example 1.

[0144] Step 5: Internal Printing

[0145] Take a new film and draw a circular pattern, where the circular pattern is fully covered with ink.

[0146] Step 6: Same as Example 1.

[0147] The obtained bottle caps were then installed to seal the bottle opening. A pull-open test was conducted on the sealed bottle caps, with the high-frequency heating power ranges set at 20%, 50%, and 80% full power. The data are shown in Table 4 (unit: N). Table 4

[0148]

[0149] As shown in Tables 4 and 1, when the pattern of the ink layer 12 is circular and fully covered by ink, the high-frequency heating power of the rear sealing gasket 2 has a small applicable range, and multiple power adjustments are required to achieve the standard pass rate. At the same time, the front cap pull force is small, the pull force of the rear sealing gasket 2 is also small, the adhesion is not strong, and the inner gasket is easy to fall off, affecting the quality of use.

[0150] Comparative Example 2, such as Figure 11 As shown:

[0151] The difference between Comparative Example 2 and Example 1 is that step 5, in which the ink layer pattern is drawn, is omitted; all other steps are the same. Specifically, Comparative Example 2 includes the following steps:

[0152] Steps 1-4: Same as in Example 1.

[0153] Step 5, Inner Printing

[0154] Take the aluminum sheet with outer varnish obtained in step 4, do not draw the ink layer pattern, cancel the design of ink layer 12, and only print the QR code on the inside to obtain the semi-finished bottle cap.

[0155] Step 6: Same as Example 1.

[0156] The obtained bottle caps were then installed to seal the bottle mouth. A pull-open test was then conducted on the sealed bottle caps. The high-frequency heating power range was set to 20%, 50%, and 80% of the heating power, and the data are shown in Table 5 (unit: N).

[0157] Table 5

[0158]

[0159] As shown in Tables 5 and 1, without the use of ink layer patterns, the high-frequency heating power of the later sealing gasket 2 has a small applicable range, and multiple power adjustments are required to achieve the standard pass rate. At the same time, the front bottle cap pull force is large, and the rear sealing gasket 2 pull force is also large. The adhesion is too tight, making it difficult to open the bottle cap and easily causing the pull ring 3 to break.

[0160] Comparative Example 3, such as Figure 12 As shown:

[0161] The difference between Comparative Example 3 and Example 1 is that step 5 is different; the rest are the same. Specifically, Comparative Example 3 includes the following steps:

[0162] Steps 1-4: Same as in Example 1.

[0163] Step 5: Internal Printing

[0164] The outer arc surface ink layer 121 and the inner arc surface ink layer 122 are both dot-shaped patterns, and the rest are the same as in Example 1.

[0165] Step 6: Same as Example 1.

[0166] The obtained bottle caps were then installed to seal the bottle opening. A pull-open test was conducted on the sealed bottle caps, with the high-frequency heating power ranges set at 20%, 50%, and 80% of the heating power. The data are shown in Table 6 (unit: N). Table 6

[0167]

[0168] As shown in Tables 6 and 1, both the outer arc surface ink layer 121 and the inner arc surface ink layer 122 are dot-matrix patterns, with an ink coverage area ratio of 50%. At this time, the ink layer 12 has a certain degree of adhesion. Meanwhile, the outer arc surface ink layer 121 has stronger adhesion than that in Example 1, and the front cap pull force is greater than that in Example 1. The pull force of the rear sealing gasket 2 is not much different, but the high-frequency heating power applicable range for the sealing gasket 2 is small, and the overall pass rate is significantly lower than that in Example 1.

[0169] Comparative Example 4, such as Figure 13 As shown:

[0170] The difference between Comparative Example 4 and Example 1 is that step 5 is different; the rest are the same. Specifically, Comparative Example 4 includes the following steps:

[0171] Steps 1-4: Same as in Example 1.

[0172] Step 5: Internal Printing

[0173] The outer arc surface ink layer 121 is fully covered with ink, the inner arc surface ink layer 122 is not printed with ink, and the rest are the same as in Example 1.

[0174] Step 6: Same as Example 1.

[0175] The obtained bottle caps were then installed to seal the bottle opening. A pull-open test was conducted on the sealed bottle caps, with the high-frequency heating power ranges set at 20%, 50%, and 80% of the heating power. The data are shown in Table 7 (unit: N). Table 7

[0176]

[0177] As shown in Tables 7 and 1, the outer arc surface ink layer 121 is the same as in Example 1, while the inner arc surface ink layer 122 is not printed with ink. At this time, the overall adhesion of the ink layer 12 is relatively strong. Meanwhile, the inner arc surface ink layer 122 on the inner side has stronger adhesion than in Example 1. The opening force of the front cap is greater than that in Example 1, and the pulling force of the rear sealing gasket 2 is also greater. However, the applicable range of high-frequency heating power for the sealing gasket is small, and the overall high-frequency heating power needs to be relatively small. It is necessary to manually adjust the batch in real time, and the overall pass rate is significantly lower than that in Example 1.

[0178] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pull-ring bottle cap, comprising a cap body (1) and a pull ring (3) connected to one side of the cap body (1), characterized in that, A sealing gasket (2) is installed on the inner side of the bottle cap body (1). An ink layer (12) that can be torn and connected to the sealing gasket (2) is also printed on the inner side of the bottle cap body (1). The ink layer (12) is a circle composed of an outer arc surface ink layer (121), an inner arc surface ink layer (122), and an arc-shaped notch (123). The outer arc surface ink layer (121) is an arc surface formed by a first arc edge (121a) and a second arc edge (121b) with the same center and two connecting segments (121d) for connecting the first arc edge (121a) and the second arc edge (121b). The first arc edge (121a) and the second arc edge (121b) are arranged in the same direction and spaced apart. The radius of the first arc edge (121a) is greater than the radius of the second arc edge (121b). The inner arc surface ink layer (122) is an arc surface formed by the second arc edge (121b) and the third arc edge (121c). The third arc edge (121c) is away from the pull ring (3), and the two ends of the third arc edge (121c) are respectively connected to the two connecting segments (121d). The third arc edge (121c) and the two connecting segments (121d) are on the same arc line. The arc-shaped notch (123) is an arc surface formed by the third arc-shaped side (121c), the two connecting segments (121d), and the fourth arc-shaped side (121f). The fourth arc-shaped side (121f) and the first arc-shaped side (121a) can be combined to form a circle. The central angle θ of the fourth arc-shaped side (121f) is less than 180 degrees and greater than 45 degrees.

2. The pull-ring bottle cap according to claim 1, characterized in that, The coverage of the ink pattern on the outer arc surface ink layer (121) is 100%, the coverage of the ink pattern on the inner arc surface ink layer (122) is 10%-80%, and the coverage of the ink pattern on the arc-shaped notch (123) is zero.

3. The pull-ring bottle cap according to claim 2, characterized in that, The inner arc surface ink layer (122) has a grid structure formed by multiple vertically arranged halftone dots and multiple horizontally arranged halftone dots with equal spacing. Multiple halftone dots are arranged sequentially on each halftone dot line, and each halftone dot is covered with ink.

4. The pull-ring bottle cap according to claim 3, characterized in that, The shape of the dots can be any one of square, circle and triangle, and 10 to 175 dots are arranged on each dot line.

5. The pull-ring bottle cap according to claim 1, characterized in that, The outer side of the bottle cap body (1) is also provided with tear lines (11) for separating the pull ring (3) from the sealing gasket (2). There are two tear lines (11), which are symmetrically arranged on the outer side of the bottle cap body (1) along the pull ring (3), and the two tear lines (11) extend around both sides of the pull ring (3) to one end of the bottle cap body (1) away from the pull ring (3).

6. The pull-ring bottle cap according to claim 1, characterized in that, The outer side of the bottle cap body (1) is printed with a pattern, and the inner side of the ink layer (12) is also printed with a QR code.

7. A method for processing a pull-ring bottle cap as described in any one of claims 1 to 6, characterized in that, Includes the following steps: Step 1: Apply base coat Take an aluminum sheet, and uniformly coat one surface of the aluminum sheet with polypropylene glycol to form a first polypropylene glycol film. Then bake it to obtain an outer base aluminum sheet. Step 2: Internal application Take the outer base aluminum sheet obtained in step 1, and uniformly coat it with polypropylene glycol on the other surface of the outer base aluminum sheet opposite to the first polypropylene glycol film to form a second polypropylene glycol film. Then bake it to obtain an inner coated aluminum sheet. Step 3: External Printing The ink pattern required for external printing is printed onto a film, and then printed onto the first polypropylene glycol film of the inner-coated aluminum sheet obtained in step 2, to obtain an aluminum sheet with an externally printed ink pattern. Step 4: Apply varnish Take the aluminum sheet with the externally printed ink pattern obtained in step 3, uniformly coat it with polypropylene glycol to form a third polypropylene glycol film, and then bake the third polypropylene glycol film to obtain an aluminum sheet with external varnish. Step 5: Internal Printing First, print the ink layer (12) pattern onto another film, then print the film onto the second polypropylene glycol film of the outer varnish aluminum sheet obtained in step 4, and bake it to obtain an aluminum sheet with the ink layer (12) pattern printed inside. Step 6: Making the bottle cap Take the aluminum sheet with the ink layer (12) pattern obtained in step 5, process it into a bottle cap body (1) semi-finished product, then stamp TPE material on the ink layer (12) inside the bottle cap body (1) semi-finished product to form a sealing gasket (2), and then process a pull ring (3) on the side of the arc-shaped notch (123) away from the ink layer (12) of the bottle cap body (1) semi-finished product to obtain the pull ring bottle cap finished product.

8. The processing method of the pull-ring bottle cap according to claim 7, characterized in that, In step 1, the areal density of the first polypropylene glycol film is 3 g / m³. 2 -5g / m 2 The baking temperature is 175℃, and the baking time is 10-12 minutes; in step 2, the areal density of the second polypropylene glycol film is 6 g / m³. 2 -7g / m 2 The baking temperature is 200℃ and the baking time is 10-12 minutes.

9. The method for processing a bottle cap according to claim 7, characterized in that, In step 3, the printing method is single-color multiple printing; in step 4, the areal density of the third polypropylene glycol film is 5 g / m³. 2 -6g / m 2 The baking temperature is 190℃ and the baking time is 10-12 minutes.

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