Easily torn film and manufacturing method thereof

Abstract

The invention discloses an easy-to-tear film which comprises a film and separation strips, the film is provided with an easy-to-tear line to divide the film into a plurality of sections, and the separation strips are arranged on the two sides of the easy-to-tear line respectively; the separation strip is made of PP materials, and cut-off parts extend out of the two sides of the separation strip and are located at the line segment connecting positions of the easy-to-tear lines. The invention further provides a manufacturing method of the easy-to-tear film, the connecting easy-to-tear line and the disconnecting easy-to-tear line are manufactured on the film at intervals, the dividing strip is arranged at the reserved position, the connecting easy-to-tear line and the disconnecting easy-to-tear line are made to be harder than the film after being fixed in a bonding or welding mode but keep the reelability, and finally the easy-to-tear function of the film is achieved by cutting the connecting position of the easy-to-tear line when the dividing strip is turned over. The device has the advantages of simple structure, compact matching, reasonable design and the like; therefore, the device is a product with excellent technical and economical performance.

Description

TECHNICAL FIELD The present application relates to a kind of easy tear film and its manufacturing method. BACKGROUND At present, the common film product on market is usually provided in the form of roll material, and is cut and separated by the serrated rack arranged on the storage box body. However, this traditional cutting method has obvious defects. Since the film itself is a flexible and ductile polymer film material, when cutting by the rack, the film will be significantly stretched and deformed at the stress point. This results in that the cutting process is not ideal "cutting", but more like "tearing", and the finally formed cut is often uneven and extremely uneven. Irregular cut not only affects the appearance, but also causes the mutual adhesion between adjacent film layers, which brings inconvenience for next use, and also weakens the sealing effect of the cut, affecting the use experience. To solve the problem of flat cutting and separation of the film, we propose a kind of easy tear film and its manufacturing method structure. SUMMARY To solve at least one of the above problems, the present application proposes a new structure scheme, and the easy tear film and its manufacturing method adopt the following technical scheme: An easy tear film, comprising a film and a separation strip, the film is provided with a tear line to divide the film into several segments, and the separation strip is arranged on both sides of the tear line. The separation strip is made of PP material, and the two sides of the separation strip extend a cutting-off part, which is located at the connection of the line segments of the tear line.

[0001] Preferably, the tear line includes a connecting tear line and a disconnecting tear line, and the separation strip is arranged between the connecting tear line and the disconnecting tear line.

[0002] Preferably, the length of the cutting-off part is consistent with the length of the connection of the line segments.

[0003] Preferably, the cross section of the cutting-off part is conical.

[0004] A method for manufacturing the easy tear film as described in any one of the above, comprising the following steps: a. A connecting tear line is made on the film by laser scribing or mechanical scribing to divide the film into several segments; b. A disconnecting tear line is made at a space away from the connecting tear line, so that the separation strip is arranged between the connecting tear line and the disconnecting tear line; c. The cutting-off part of the separation strip is aligned with the connection of the line segments of the tear line, so that the separation strip can cut the connection of the line segments when it is folded; d. The separation strip is fixed on the film by adhesion or fusion, so as to form a whole with the film; the thickness of the separation strip is 0.5 mm, and the width is 1 mm, so that the separation strip is harder than the film and does not affect the folding.

[0005] The beneficial effects of this invention compared to the prior art are as follows: This solution effectively solves the problems of cut extension and unevenness caused by the softness of the film in traditional rack cutting by pre-setting easy-tear lines on the film and setting rigid PP material separators on both sides of the lines. The cut-off part on the separator can accurately and easily cut the connecting part of the easy-tear lines, realizing quick and neat separation between segments. This not only ensures a flat and beautiful cut, but also provides a flexible and reliable tearing and separation method by distinguishing between connecting and disconnecting easy-tear lines, greatly improving the convenience of use and product experience. It has the advantages of simple structure, compact fit, and reasonable design; therefore, it is a product with superior performance in both technology and economy. [Attached Image Description] Figure 1 A schematic diagram of the tearable film in a preferred embodiment of the present invention; Figure 2 This is a partial schematic diagram of the tearable film in a preferred embodiment of the present invention.

Detailed Implementation Methods

[0006] In this invention, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0007] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and its beneficial effects clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the invention.

[0008] The preferred embodiments provided by the present invention are as follows: Figure 1 and Figure 2 As shown, an easy-tear film includes a film 1 and a separator strip 2. The film 1 is provided with an easy-tear line 3 to divide the film 1 into several segments, and the separator strip 2 is respectively provided on both sides of the easy-tear line 3. The separator strip 2 is made of PP material, and cut-off portions 21 extend from both sides of the separator strip 2. The cut-off portions 21 are located at the line segment connection of the easy-tear line 3. The easy-tear line 3 includes a connecting easy-tear line 31 and a disconnecting easy-tear line 32, and the separator strip 2 is located between the connecting easy-tear line 31 and the disconnecting easy-tear line 32.

[0009] The length of the cut-off portion 21 is the same as the length of the connection point of the line segments, precisely cutting off the connecting part and achieving separation between the film segments. The cross-section of the cut-off portion 21 is conical, facilitating the back-and-forth movement of the separator strip 2 to cut the tear-off line 3. The existing film 1 is usually cut using the toothed strips of the food storage container. However, film 1 is a flexible material, and during use, it often stretches at the cut, resulting in an uneven cut. This is because film 1 is too soft. Therefore, we propose a solution: an easy-tear line 3 is set on film 1, and a separator strip 2 is set near the easy-tear line 3. The separator strip 2 is made of a rigid material, which can easily cut the easy-tear line 3 to achieve a smooth cut on film 1. The easy-tear line 3 is divided into a connecting easy-tear line 31 and a disconnecting easy-tear line 32. The connecting easy-tear line 31 is mainly used to connect the different sections of film 1, while the disconnecting easy-tear line 32 is used to separate the separator strip 2 from film 1. The connecting easy-tear line 31 can be torn directly by two adjacent separator strips 2, or the connecting easy-tear line 31 can be cut back and forth using the cutting part 21. However, since the disconnecting easy-tear line 32 only has a separator strip 2 on one side, the disconnecting easy-tear line 32 can only be separated by cutting back and forth using the cutting part 21.

[0010] A method for manufacturing an easy-tear film, characterized by the following steps: a) creating connecting easy-tear lines on the film using laser scribing or mechanical scribing to divide the film into several segments; the easy-tear lines consist of a series of continuous micron-level dotted lines with a depth of 60% of the total film thickness, dividing the continuous film into multiple independent packaging segments. b) creating disconnecting easy-tear lines separated from the connecting easy-tear lines, so that a separator strip is placed in the reserved space between the connecting and disconnecting easy-tear lines; c) preparing a separator strip made of PET (polyethylene terephthalate) material. The separator strip has a rectangular cross-section, a thickness of 0.5 mm, and a width of 1 mm. This size design ensures that the separator strip has sufficient rigidity (harder than the film), while its small size does not affect the overall flexibility and roll-up storage of the film. The cut-off portion of the separator strip is aligned with the joint of the tear-off line so that the separator strip can cut the joint when folded; d. The separator strip is fixed to the film by adhesive or welding to form a whole with the film; the separator strip is 0.5mm thick and 1mm wide, so that the separator strip is harder than the film and does not affect folding. In this embodiment, hot melt adhesive is used as the adhesive, and the separator strip is firmly bonded to the film surface by heating and pressing. The adhesive area covers the entire bottom surface of the separator strip, making it a whole structure with the film.

[0011] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0012] Based on the above description of the structure and principle, those skilled in the art should understand that the present invention is not limited to the specific embodiments described above. Improvements and substitutions made using techniques known in the art based on the present invention all fall within the protection scope of the present invention and should be defined by the claims.

Claims

1. A tearable film characterized by: It comprises a film and a separation strip, the film is provided with a tear line to divide the film into several sections, and the separation strip is arranged on both sides of the tear line respectively; The separation strip is made of PP material, and a cutting-off part is extended from both sides of the separation strip, and the cutting-off part is located at the connection of the line segments of the tear line.

2. A tearable film according to claim 1, wherein: The tear line comprises a connecting tear line and a disconnecting tear line, and the separation strip is arranged between the connecting tear line and the disconnecting tear line.

3. A tearable film as defined in claim 1, wherein: The length of the cutting-off part is consistent with the length of the connection of the line segments.

4. A tearable film as defined in claim 1, wherein: The cross section of the cutting-off part is conical.

5. A method of manufacturing the easy-to-tear film according to any one of claims 1 to 4, characterized by, The method comprises the following steps: a. A connecting tear line is made on the film by laser scribing or mechanical scribing to divide the film into several sections; b. A disconnecting tear line is made at a space apart from the connecting tear line to reserve a position for the separation strip between the connecting tear line and the disconnecting tear line; c. The cutting-off part of the separation strip is aligned with the connection of the line segments of the tear line to enable the separation strip to cut the connection of the line segments when it is folded; d. The separation strip is fixed on the film by adhesion or fusion to form an integral whole with the film; the thickness of the separation strip is 0.5 mm, and the width is 1 mm, so that the separation strip is harder than the film and does not affect the folding.

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