A local corona film and a packaging bag
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- AMCO TECH R&D CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-08-07
AI Technical Summary
[0002]背封袋作为包装袋中的一种，凭借其美观性、实用性和经济性，广泛应用在食品行业、医疗器械行业、日化和工业各类产品的包装中；背封袋通常采用两层或超过两层不同材料组成的多层复合材质，在制备用于生产背封袋的过程中导致了生产工艺较为复杂，并且，不同材料所制备的复合多层薄膜，在进行包装袋封装的工艺中，存在封口上的技术问题，常常会导致包装袋封装不够牢固，容易开袋
[0014]本实用新型提供的局部电晕薄膜及包装袋，至少具有如下有益效果：既保证了电晕区印刷性能和油墨附着力，同时通过结构上对电晕加工区域的重新设计，实现了热封面与印刷面搭封，从而提升了传统多层复合包装薄膜在具体加工成袋的热封可靠性，本申请所提供的局部电晕薄膜结构简单，同时后续加工成袋过程更加可靠。
Smart Images
Figure CN224603609U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging materials technology, and in particular to a localized corona film and packaging bag. Background Technology
[0002] Back-seal bags, as a type of packaging bag, are widely used in the packaging of various products in the food, medical device, daily chemical, and industrial industries due to their aesthetic appeal, practicality, and economy. Back-seal bags are usually made of multi-layer composite materials composed of two or more layers of different materials, which makes the production process relatively complex. Furthermore, the sealing technology of the multi-layer composite film made of different materials often presents technical problems in the sealing process, resulting in the packaging bag not being securely sealed and being easy to open. Utility Model Content
[0003] This utility model aims to solve at least one of the technical problems existing in the prior art.
[0004] First, this application provides a local corona film. Specifically, the local corona film is a multilayer composite structure, wherein the outermost layer is a first processing layer, the edge portion of the first processing layer is provided with a first non-corona region, the middle portion of the first processing layer is provided with a second non-corona region, and the first processing layer is provided with a corona region between the first non-corona region and the second non-corona region. The first non-corona region and the second non-corona region are bonded together by thermal processing.
[0005] As a further improvement to the above technical solution, the local corona film is further provided with a second region, which is located between the corona region and the first non-corona region, and the second region is used as a reserved bending area.
[0006] As a further improvement to the above technical solution, the local corona film is also provided with a third region, which is located between the corona region and the second non-corona region, and the third region is used as a reserved bending area.
[0007] As a further improvement to the above technical solution, the edge portion of the local corona film is further provided with a first region, which is located outside the first non-corona region and is used as a pre-cutting area.
[0008] As a further improvement to the above technical solution, the dyne value in the corona region is ≥42, and the dyne values in the first non-corona region and the second non-corona region are ≤33.
[0009] Preferably, the boundary line between the first region and the first non-corona region is the first slitting line, and the local corona film is slid along the center line of the second non-corona region and the first slitting line, with a slitting width of 420 mm.
[0010] Preferably, the width of the local corona film is 865 mm, the width of the corona region (101) is 373 mm-387 mm, the width of the first non-corona region (202) is 16 mm-24 mm, the width of the second region (203) is 5 mm, the width of the third region (204) is 5 mm, and the width of the second non-corona region (205) is 33 mm-47 mm.
[0011] Secondly, this application also provides a packaging bag comprising the aforementioned localized corona film.
[0012] As a further improvement to the above technical solution, the first non-corona region and the second non-corona region are overlapped to form a first processing area. The first processing area also includes a second processing area in which the first non-corona region and the second non-corona region are combined through thermal processing.
[0013] Preferably, the packaging bag is 260mm long and 200mm wide; the width of the first processing area (102) is 16mm-24mm; and the width of the second processing area is 9mm.
[0014] The partial corona film and packaging bag provided by this utility model have at least the following beneficial effects: they ensure the printing performance and ink adhesion of the corona area, and at the same time, through the structural redesign of the corona processing area, the heat seal and the printing surface are overlapped, thereby improving the heat sealing reliability of traditional multi-layer composite packaging films in the specific processing of bags. The partial corona film provided by this application has a simple structure, and the subsequent bag processing is more reliable.
[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0017] Figure 1 This is a schematic diagram of a localized corona film in a specific embodiment;
[0018] Figure 2 This is a schematic diagram of a packaging bag in a specific embodiment;
[0019] In the attached diagram: 201 First region; 202 First non-corona region; 203 Second region; 204 Third region; 205 Second non-corona region;
[0020] 101 Corona Zone; 102 First Processing Zone; 103 Second Processing Zone. Detailed Implementation
[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0024] The following is combined with Figures 1 to 2 The embodiments of this utility model are described below.
[0025] First, this utility model provides a local corona film. Specifically, the local corona film is a multilayer composite structure, wherein the processing layer is a first processing layer, the edge portion of the first processing layer is provided with a first non-corona region 202, the middle portion of the first processing layer is provided with a second non-corona region 205, the first processing layer is provided with a corona region 101 between the first non-corona region 202 and the second non-corona region 205, and the first non-corona region 202 and the second non-corona region 205 are bonded together by thermal processing.
[0026] Specifically, most of the film materials used to make product packaging are currently composite multilayer materials. However, in the current technology, most composite multilayer film materials require corona treatment during the preparation process. In the subsequent process of overlapping and heat-sealing the film materials to make packaging bags, the heat seal is not firm due to the different material properties of the overlapping areas after bending.
[0027] In this invention, by applying local corona discharge, a structure for heat sealing is provided while ensuring that the film body can easily adhere to the printing material. This allows the film provided by this invention to produce more reliable packaging bags during production.
[0028] In practical use, cut to the required length, and then cut out the desired length as follows: Figure 1The portion of the film shown is divided along the center line of the second non-corona region 205, thereby dividing it into two film blocks that can independently form packaging bags. Then, each film block is folded along the center line of the corona region 101, so that the first non-corona region 202 can overlap with half the width of the second non-corona region 205. At this point, heat sealing can be completed by heat processing.
[0029] The local corona film also has a second region 203, which is located between the corona region 101 and the first non-corona region 202. The second region 203 is used to reserve bending to ensure processing redundancy and accuracy.
[0030] The local corona film also includes a third region 204, which is located between the corona region 101 and the second non-corona region 205. The third region 204 serves as a bend allowance to ensure processing redundancy.
[0031] The edge of the partially corona-treated film also has a first region 201, which is located outside the first non-corona-treated region 202. The first region 201 is used as a pre-cutting allowance. The first region 201 serves as a region that can be cut off in the later stages of processing to adjust the specific size of the film when it is made into a bag.
[0032] The dyne value of the corona region 202 is ≥42, and the dyne values of the first non-corona region 202 and the second non-corona region 205 are ≤33. The corona region is processed to an appropriate degree until the dyne value of the corona region is not lower than 42, thereby making the corona region easier to process. A specific range of dyne values is obtained. Higher dyne values can effectively improve the ink adhesion of the corona region 101, thus enabling the localized corona film provided by this invention to be effectively printed and dyed, with stable color that does not fade.
[0033] The boundary line between the first region and the first non-corona region is the first slitting line. The local corona film is slit along the center line of the second non-corona region and the first slitting line, with a slitting width of 420 mm. In this utility model, for the preparation of a commonly used size packaging bag, it is demonstrated that the first region at the edge is separated during the processing to ensure the overall processing quality.
[0034] The width of the localized corona film is 865 mm, the width of the corona region 101 is 370 mm, the width of the first non-corona region 202 is 20 mm, the width of the second region 203 is 5 mm, the width of the third region 204 is 5 mm, and the width of the second non-corona region 205 is 40 mm. An accurate and detailed demonstration of a commonly used film size is provided.
[0035] The first non-corona-electrode region and the second non-corona-electrode region are overlapped to form the first processing area 102. The first processing area also includes a second processing area 103, which is formed by heat treatment to bond the first non-corona-electrode region and the second non-corona-electrode region together. The specific form of the film provided in this application during the packaging bag manufacturing process is demonstrated: the partially corona-electrode film, after being cut, is folded along its center line. At this time, the second region 203 and the third region 204 overlap to form the first processing area 102. The first processing area 102 is then heat-sealed, causing the overlapped first processing area 102 to form a tight bond, becoming the second processing area 103, which facilitates subsequent sealing and ultimately produces a packaging bag.
[0036] The packaging bag is 260mm long and 200mm wide; the width of the first processing area 102 is 16mm-24mm; the width of the second processing area is 9mm.
Claims
1. A localized corona film, characterized in that, The localized corona film is a multi-layer composite structure, wherein the outermost layer is a first processing layer, the edge portion of the first processing layer is provided with a first non-corona region, the middle portion of the first processing layer is provided with a second non-corona region, and the first processing layer is provided with a corona region between the first non-corona region and the second non-corona region. The first non-corona region and the second non-corona region are bonded together by thermal processing.
2. The localized corona film according to claim 1, characterized in that, The local corona film also has a second region, which is located between the corona region and the first non-corona region, and the second region is used as a bend allowance.
3. The localized corona film according to claim 2, characterized in that, The local corona film also has a third region, which is located between the corona region and the second non-corona region, and the third region is used as a bend allowance.
4. The localized corona film according to claim 1, characterized in that, The edge portion of the local corona film is further provided with a first region, which is located outside the first non-corona region and is used as a pre-cutting area.
5. The localized corona film according to claim 1, characterized in that, The dyne value in the corona region is ≥42, and the dyne values in the first non-corona region and the second non-corona region are ≤33.
6. A localized corona film according to claim 4, characterized in that, The boundary line between the first region and the first non-corona region is the first slitting line. The local corona film is slid along the center line of the second non-corona region and the first slitting line, and the width of the slitting is 420mm.
7. The localized corona film according to claim 3, characterized in that, The width of the local corona film is 865mm, the width of the corona region is 373mm-387mm, the width of the first non-corona region is 16mm-24mm, the width of the second region is 5mm, the width of the third region is 5mm, and the width of the second non-corona region is 33mm-47mm.
8. A packaging bag, characterized in that, Includes the localized corona film as described in any one of claims 1-7.
9. A packaging bag according to claim 8, characterized in that, The first non-corona region and the second non-corona region are overlapped to form a first processing area. The first processing area also includes a second processing area in which the first non-corona region and the second non-corona region are combined through thermal processing.
10. A packaging bag according to claim 9, characterized in that, The packaging bag is 260mm long and 200mm wide; the width of the first processing area is 16mm-24mm; and the width of the second processing area is 9mm.