Shrink film wrapped outside bottle body and bottle body film sleeving method

Abstract

The shrink film comprises a film body, the film body wraps a left film area and a right film area which are symmetrically arranged in the left-right direction, the left film area and the right film area each comprise a pattern area located in the middle, and a laser notch area is arranged on one side of each pattern area. The laser cutting area corresponds to the hollowed-out position of the handle of the bottle body, the bottle further comprises a first gluing area, and the first gluing area is located at the junction of the pattern area and the laser cutting area. According to the method, the bottom of the bottle body and the laser drilling position are adhered to the film body, the film body can be prevented from sliding when the film shrinks; and the condition that a laser cut area warps when laser hole digging is carried out is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bottle body sleeve film, in particular to a bottle body outer shrink film and a bottle body sleeve film method. BACKGROUND

[0002] At present, in the wide application of the packaging industry, the bottle body outer shrink film has become a very common packaging method, which is adopted by many enterprises. In the specific sleeve film packaging, especially for the sleeve film of special-shaped bottles, some technical problems are often encountered. For example, the irregular shape of the bottle body may cause the shrink film to be unable to fit uniformly, resulting in wrinkles, bubbles, sliding or lifting, etc., thereby affecting the appearance and protection effect of the product. In addition, the traditional sleeve film method may be relatively complex in operation, low in efficiency and increase the production cost. Therefore, the present application aims to provide a bottle body outer shrink film and a bottle body sleeve film method which can solve the above problems, so as to improve the packaging quality and production efficiency. SUMMARY

[0003] The technical problem solved by the present application is to provide a bottle body outer shrink film which can improve the shrink effect.

[0004] The technical solution adopted by the present application to solve the technical problem is: a bottle body outer shrink film, comprising a film body, the film body comprises a left film area and a right film area arranged symmetrically left and right, the left film area and the right film area both comprise a pattern area located in the middle, one side of the pattern area is provided with a laser cutting area, the laser cutting area corresponds to the position of the hollow part of the bottle handle, further comprising a first glue coating area, the first glue coating area is located at the junction of the pattern area and the laser cutting area.

[0005] Further, it further comprises a second glue coating area, the second glue coating area is located at the lower part of the film body.

[0006] Further, the film body is a composite shrink film, the composite shrink film comprises a PVC layer, and the two sides of the PVC layer are PETG layers.

[0007] The present application further discloses a bottle body sleeve film method, the steps are: S100: printing ink on the outer surface of the film body to form a pattern; S200: coating glue on the glue coating area of the inner surface of the film body; S300: sleeving the film body on the bottle body, and making the film body adhere to the bottle body at the glue area; S400: sequentially feeding the bottle body sleeved with the film body into a first shrinkage furnace, a second shrinkage furnace and a third shrinkage furnace for film body shrinkage; S500: laser cutting the laser cutting area on the film body.

[0008] Further, in step S200, the glue is coated on the inner surface of the film body by using the gravure coating method, and the coating amount is 3g / m 2 .

[0009] Further, in step S200, the glue is coated on the inner surface of the film body, specifically, the glue is coated on the junction of the pattern area and the laser cutting area. And / or the glue is coated on the lower part of the film body.

[0010] Further, in step S100, the ink is printed on the outer surface of the film body by using the gravure process to form a pattern.

[0011] Further, in step S400, the temperature of the first shrinkage furnace is 67-69 degrees, the temperature of the second shrinkage furnace is 77-79 degrees, and the temperature of the third shrinkage furnace is 79-81 degrees.

[0012] Further, the first nozzle for spraying hot gas on the bottom of the bottle body is fixedly connected in the first shrinkage furnace, the second nozzle for spraying hot gas on the lower part of the bottle body is fixedly connected in the second shrinkage furnace, and the third nozzle for spraying hot gas on the upper part of the bottle body is fixedly connected in the third shrinkage furnace.

[0013] Further, before step S100, step S000 is further included, specifically, a test film body is formed by uniformly drawing grid lines on the surface of the film body, the ink is printed on the surface of the test film body, the glue is coated on the inner surface of the test film body, the test film body is sleeved on the bottle body, the film body is adhered to the bottle body at the glue area, the bottle body with the sleeved test film body is sequentially sent into the first shrinkage furnace, the second shrinkage furnace and the third shrinkage furnace for film body shrinkage, the deformation of the grid lines on the test film body is observed, and the pattern formed by printing the ink is pre-deformed according to the deformation.

[0014] The beneficial effects of the present application are: 1. In the method, the film body is adhered to the bottle body at the bottom of the bottle body and the laser drilling position, so that the film body sliding during film shrinkage is prevented, and the laser cutting area is prevented from being raised during laser drilling.

[0015] 2. In the method, the coating method and the coating amount are selected to reduce the amount of glue while ensuring the adhesion of the film body to the bottle body.

[0016] 3. In the method, the ink pattern is printed on the film body by using the gravure process, and the shrinkage rate is better when the film body is shrunk. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the film body structure of the embodiment of the present application.

[0018] The markings in the figure are: film body 1, pattern area 2, laser cutting area 3, first glue coating area 4, and second glue coating area 5. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0020] like Figure 1 As shown, an embodiment of the present application discloses a bottle outer shrink film, including a film body 1, wherein the film body 1 includes a left film area and a right film area that are symmetrically arranged on the left and right sides, and the left film area and the right film area both include a pattern area 2 located in the middle, and a laser cutting area 3 is provided on one side of the pattern area 2, and the laser cutting area 3 corresponds to the position of the hollowed-out part of the bottle handle, and also includes a first glue coating area 4, which is located at the junction of the pattern area 2 and the laser cutting area 3.

[0021] It should be explained that the complete membrane does not include Figure 1 The contour lines in Figure 1 The outlines in the figure are for the purpose of clearly explaining the functions of each area.

[0022] Specifically, the film body 1 is provided with a specially designed structure to ensure that the film body 1 fits perfectly on the bottle body. The film body 1 is designed to be bilaterally symmetrical with a left film area and a right film area. This design is not only beautiful, but also more convenient in actual operation and can adapt to bottles of different shapes. In the middle of each film area, a pattern area 2 is provided for displaying product information or brand logos. A laser cut area 3 is cleverly provided on one side of the pattern area 2. This design perfectly corresponds to the hollowed-out area of ​​the bottle handle, allowing the film body 1 to tightly wrap the bottle body after shrinking without leaving any gaps or wrinkles.

[0023] The film 1 also features a first adhesive coating area 4, located at the junction of the patterned area 2 and the laser-cut area 3. This layout ensures that the film 1 adheres securely to the bottle during bonding, particularly in key areas such as the handle. The design of the adhesive coating area also takes into account the shrinkage properties of the film 1, ensuring that during the heat-shrinking process, the film 1 adheres smoothly to the bottle surface without slipping or warping.

[0024] In addition, the film body 1 in this embodiment adopts a composite shrink film material, which is composed of a PVC layer and PETG layers on both sides. This composite structure not only gives the film body 1 good shrinkage performance, but also ensures its stability and durability during the shrinkage process.

[0025] In this embodiment, a second glue coating area 5 is further included, and the second glue coating area 5 is located at the lower part of the film body 1.

[0026] It should be explained that the lower part here refers to the part corresponding to the lower part of the bottle body.

[0027] Specifically, when the bottle body is a special-shaped bottle, the lower part of the film body 1 is adhered and combined with the bottle body to prevent the film body 1 from sliding up at the bottom during shrinkage at high temperature. Such a design further enhances the bonding force between the film body 1 and the bottle body, especially when handling special-shaped bottles, effectively avoiding displacement of the film body 1 during the shrinkage process, and ensuring perfect packaging effect.

[0028] In this embodiment, the second glue coating area of the left film area and the second glue coating area of the right film area are arranged separately.

[0029] Specifically, the second glue coating area of the left film area and the right film area is arranged separately, which can effectively avoid the problem of adhesion caused by too much glue during the shrinkage process of the film body, and at the same time ensure the firm combination between the film body and the bottle body. This way of interval gluing not only saves the amount of glue, but also improves the packaging efficiency and quality.

[0030] In this embodiment, the film body 1 is a composite shrink film, which includes a PVC layer, and the two sides of the PVC layer are PETG layers.

[0031] Specifically, the PVC layer serves as the main bearing layer of the film body 1, providing good mechanical strength and toughness, while the PETG layer endows the film body 1 with excellent shrinkage performance and optical transparency. Such a combination enables the film body 1 to quickly and uniformly adhere to the surface of the bottle body when heated and shrunk, which can improve the overall appearance of the product.

[0032] In this embodiment, the first glue coating area is arranged on the inner side and the outer side of a section of the profile close to the pattern area of the laser cutting area.

[0033] Specifically, the above arrangement can further enhance the adhesion strength of the film body in the laser cutting area, preventing the cutting edge from lifting or the film body from falling off during laser cutting. In addition, this glue layout also helps the film body to better adhere to the surface of the bottle body during shrinkage, especially at complex shaped parts such as bottle handles, which can significantly improve the flatness and aesthetics of the packaging.

[0034] The application also discloses a bottle body film wrapping method, characterized in that the steps are as follows: S100: printing ink is printed on the outer surface of the film body 1 to form a pattern; S200: glue is applied to the glue coating area on the inner surface of the film body 1; S300: the film body 1 is wrapped on the bottle body, and the film body 1 is adhered to the bottle body at the glue area; S400: The bottle body sleeved with the film body 1 is sequentially sent into the first shrinkage furnace, the second shrinkage furnace and the third shrinkage furnace for film body 1 shrinkage; S500: Laser cutting is performed on the laser cut area 3 on the film body 1.

[0035] Specifically, when the above method is used for film sleeving, first, the operator will carefully print ink patterns on the outer surface of the film body 1. These patterns may be product information, brand logos or other attractive design elements. Then, a layer of glue is uniformly applied to the inner surface of the film body 1, especially in the pre-set glue application area. Subsequently, the film body 1 with the applied glue is carefully sleeved on the bottle body, and it is ensured that the film body 1 is tightly adhered to the bottle body at the glue area. Next, the bottle body sleeved with the film body 1 is sequentially sent into the first shrinkage furnace, the second shrinkage furnace and the third shrinkage furnace for film body 1 shrinkage. In different shrinkage furnaces, the temperature is accurately controlled within a certain range to ensure that the film body 1 can uniformly and quickly shrink. Finally, when the film body 1 is completely shrunk and tightly adhered to the bottle body, the operator will perform laser cutting on the laser cut area 3 on the film body 1. This step is to ensure that the film body 1 perfectly fits the hollow part of the bottle body handle without any gap or wrinkle. After cutting, the final bottle packaging is completed.

[0036] In this embodiment, in step S200, the gravure coating method is used to apply glue to the inner surface of the film body 1, and the coating amount is 3g / m 2 .

[0037] Specifically, the glue applied here is latex type glue, and when the coating amount is 3g / m 2 , the peel strength is 400 / N, which ensures the firm adhesion of the film body 1 to the bottle body while ensuring the uniformity and economy of the glue application process.

[0038] In this embodiment, in step S200, glue is applied to the glue application area on the inner surface of the film body 1, specifically: glue is applied at the junction of the pattern area 2 and the laser cut area 3; and / or glue is applied to the lower part of the film body 1.

[0039] Specifically, applying glue at the junction of the pattern area 2 and the laser cut area 3 can ensure the firm adhesion of the film body 1 to the key parts of the bottle body such as the handle, preventing the film body 1 from falling off or shifting during shrinkage or transportation. At the same time, applying glue to the lower part of the film body 1, especially when dealing with special-shaped bottles, can effectively prevent the film body 1 from sliding up during shrinkage, further enhancing the bonding force between the film body 1 and the bottle body.

[0040] Specifically, when implementing this scheme, offset comparison experiments of shrinkage films with and without glue application are conducted, and the experimental results are as follows: Defect rate: From the above data, the following conclusions can be drawn: 1. Gluing at the lower part of the film body 1, i.e. at the bottom of the bottle, has a good improvement effect on the white exposure of the bottle bottom.

[0041] 2. Gluing at the handle has a significant improvement effect on the wrinkles of the shoulder and the hanging threads of the shoulder.

[0042] 3. After gluing in the gluing area, the shrinkage film offset problem is greatly improved.

[0043] In summary, in this method, by adhering to the film body 1 at the bottom of the bottle and the laser drilling position, the sliding of the film body 1 during shrinkage can be prevented, and the lifting of the laser cutting area 3 during laser drilling can be prevented.

[0044] In this embodiment, in step S100, a gravure printing process is used to print ink on the outer surface of the film body 1 to form a pattern.

[0045] Specifically, the following experiments were conducted: the ink was printed on the white bottom blue grid shrink film and the white bottom shrink film using gravure printing, and the ink was printed on the white bottom shrink film using flexographic printing. After printing, the thickness of the three materials was: It should be explained that when printing, only one layer of ink is printed on the white bottom blue grid shrink film, and a complete ink pattern needs to be printed on the white bottom shrink film using gravure or flexographic printing, i.e. multiple layers of ink need to be printed.

[0046] The following are the shrinkage rates at different temperatures: From the above data, it can be seen that the effect of printing on the white bottom shrink film using gravure printing is better than that of printing on the white bottom shrink film using flexographic printing.

[0047] In this embodiment, in step S400, the temperature of the first shrinkage furnace is 67-69 degrees, the temperature of the second shrinkage furnace is 77-79 degrees, and the temperature of the third shrinkage furnace is 79-81 degrees.

[0048] Specifically, by precisely controlling the temperature of the shrinkage furnace at different shrinkage stages, it can be ensured that the film body 1 can be gradually and uniformly shrunk, thereby avoiding deformation or rupture of the film body 1 due to sudden temperature changes.

[0049] Specifically, the first shrinkage furnace is fixedly connected with a first nozzle for spraying hot gas on the bottom of the bottle, the second shrinkage furnace is fixedly connected with a second nozzle for spraying hot gas on the lower part of the bottle, and the third shrinkage furnace is fixedly connected with a third nozzle for spraying hot gas on the upper part of the bottle.

[0050] That is, the first shrinkage furnace shrinks the bottom of the bottle body, the second shrinkage furnace shrinks the lower part of the bottle body, and the third shrinkage furnace shrinks the upper part of the bottle body. Tests show that if the nozzle is not fixed, the nozzle will shake during the shrinking process, causing uneven temperature inside the furnace and unstable relative distance between the nozzle and the bottle body during shrinking. Therefore, when the nozzle is fixed, the problem of wrinkles in the film body 1 during shrinking can be well solved.

[0051] In this embodiment, before step S100, step S000 is further included, specifically: forming a test film body 1 by uniformly drawing grid lines on the surface of the film body 1, printing ink on the surface of the test film body 1, coating glue on the glue area of the inner surface of the test film body 1, sleeving the test film body 1 on the bottle body, making the film body 1 adhere to the bottle body at the glue area, and then feeding the bottle body with the sleeved test film body 1 into the first shrinkage furnace, the second shrinkage furnace and the third shrinkage furnace in sequence to shrink the film body 1, observing the deformation of the grid lines on the test film body 1, and pre-deforming the pattern formed by the printed ink according to the deformation.

[0052] It should be explained that this step is the operation of printing on the shrink film with white background and blue grid by intaglio and then high-temperature shrinking.

[0053] Specifically, this pre-deformation design step greatly improves the precision and aesthetics of packaging, ensuring the competitiveness of the final product in the market. By carefully observing the deformation of the grid lines on the test film body 1, the operator can accurately master the change rule of the film body 1 during shrinking, and thus make corresponding adjustments in advance when designing the ink pattern. In this way, when the actual film body 1 is shrunk, the pattern can perfectly fit on the bottle body, avoiding distortion or misplacement of the pattern, and improving the overall visual effect of the product.

[0054] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A bottle wrapped with shrink film, characterized in that: The invention comprises a membrane body (1), wherein the membrane body (1) comprises a left membrane area and a right membrane area which are arranged symmetrically on the left and right sides, wherein the left membrane area and the right membrane area both comprise a pattern area (2) located in the middle, a laser incision area (3) is provided on one side of the pattern area (2), wherein the laser incision area (3) corresponds to the position of the hollowed-out portion of the bottle handle, and further comprises a first glue coating area (4), wherein the first glue coating area (4) is located at the junction of the pattern area (2) and the laser incision area (3).

2. The bottle outer covering shrink film according to claim 1, characterized in that: It also includes a second glue coating area (5), which is located at the lower part of the membrane body (1).

3. The bottle outer covering shrink film according to claim 2, characterized in that: The left film area and the right film area are respectively provided with the second glue coating area, and the second glue coating area of ​​the left film area and the second glue coating area of ​​the right film area are spaced apart from each other.

4. The bottle outer covering shrink film according to claim 1, characterized in that: The film body (1) is a composite shrink film, and the composite shrink film comprises a PVC layer, and both sides of the PVC layer are PETG layers.

5. The bottle outer covering shrink film according to claim 1, characterized in that: The first glue coating area is provided on both the inner side and the outer side of a section of the outline of the laser cutting area close to the pattern area.

6. A bottle film coating method, characterized in that: The steps are: S100: Printing ink on the outer surface of the film (1) to form a pattern; S200: applying glue to the glue-coated area on the inner surface of the membrane body (1); S300: The film body (1) is placed on the bottle body, and the film body (1) is adhered to the bottle body at the glue area; S400: sending the bottle body covered with the film body (1) into the first shrinking furnace, the second shrinking furnace and the third shrinking furnace in sequence to shrink the film body (1); S500: Laser cutting the laser cut area (3) on the membrane (1).

7. The bottle film coating method according to claim 6, characterized in that: In step S200, glue is applied to the inner surface of the film (1) using a gravure coating method, with a coating amount of 3 g / m 2 .

8. The bottle film coating method according to claim 6, characterized in that: In step S200, glue is applied to the glue-coated area on the inner surface of the film body (1), specifically: glue is applied at the junction of the pattern area (2) and the laser cut area (3); And / or apply glue to the lower part of the membrane body (1).

9. The bottle film coating method according to claim 6, characterized in that: In step S100, a pattern is formed by printing ink on the outer surface of the film body (1) using a gravure printing process.

10. The bottle film coating method according to claim 6, characterized in that: In step S400, the temperature of the first shrinking furnace is 67-69 degrees Celsius, the temperature of the second shrinking furnace is 77-79 degrees Celsius, and the temperature of the third shrinking furnace is 79-81 degrees Celsius.

11. The bottle film coating method according to claim 6, characterized in that: The first shrinking furnace is fixedly connected to a first nozzle for spraying hot air to the bottom of the bottle body, the second shrinking furnace is fixedly connected to a second nozzle for spraying hot air to the lower part of the bottle body, and the third shrinking furnace is fixedly connected to a third nozzle for spraying hot air to the upper part of the bottle body.

12. The bottle film coating method according to claim 6, characterized in that: Before step S100, step S000 is also included, specifically: evenly drawing grid lines on the surface of the film body (1) to form a test film body (1), printing ink on the surface of the test film body (1), applying glue to the glue-coated area on the inner surface of the test film body (1), putting the test film body (1) on the bottle body, making the film body (1) adhere to the bottle body in the glue area, sending the bottle body with the test film body (1) into the first shrinking furnace, the second shrinking furnace and the third shrinking furnace in turn to shrink the film body (1), observing the deformation of the grid lines on the test film body (1), and performing pre-deformation design on the pattern formed by the printed ink according to the deformation.

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