An easy-to-tear protective film and a production process thereof

Abstract

The application discloses an easy-to-tear protective film, which comprises a protective film body and tearable films arranged on the protective film body, wherein the tearable films are arranged in a plurality of groups, each group of the tearable films comprises a fixed section fixedly connected with the protective film body and a free section facilitating the lifting of the tearable films, and a plurality of point-break incisions are arranged on the protective film body, and the fixed section is arranged adjacent to the point-break incisions. The easy-to-tear protective film has a reasonable structure, and the processing position of the easy-to-tear incisions does not need to be calculated according to the packaged product, and the easy-to-tear protective film has high universality.

Description

Technical Field

[0001] This invention relates to the field of thin film technology, and in particular to an easy-tear protective film and its manufacturing process. Background Technology

[0002] The origins of easy-tear film packaging lie in reducing harm to children and addressing the problem of difficult-to-open plastic packaging, advocating for child-friendly and harmless product packaging. Later, easy-tear film was not only used for children's packaging but also extended to medical products, food packaging, pet packaging, and more. Compared to traditional plastic packaging, easy-tear film has a significant advantage in opening performance.

[0003] Currently, most easy-tear films on the market have a serrated tear-off edge cut into one side of the film after processing. This tear-off edge makes the film easy to tear.

[0004] Regarding the current easy-tear films, the inventors discovered that existing easy-tear films are all specific to a particular purpose and lack universality. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects in the prior art and provide an easy-tear protective film and its manufacturing process, which eliminates the need to calculate the processing position of the easy-tear opening for the packaged product and has strong versatility.

[0006] To achieve the above technical effects, the technical solution of the present invention is as follows: an easy-tear protective film, comprising a protective film body and a tear-off film disposed on the protective film body, wherein a plurality of tear-off films are disposed, and the tear-off film includes a fixed section fixedly connected to the protective film body and a free section for facilitating the tear-off film to be pulled up; the protective film body is provided with a plurality of point-cut slits, and the fixed section is disposed adjacent to the point-cut slits.

[0007] A preferred technical solution is that the diameter of the fixed segment is greater than the width of the free segment.

[0008] A preferred technical solution is that the point-cut is arranged in a ring shape, and the outer and / or inner rings of the point-cut are provided with a plurality of the tear-off films.

[0009] A preferred technical solution is that the point-cut is arranged in an arc shape or a straight line, and the tear film corresponds one-to-one with the point-cut.

[0010] A process for manufacturing easy-tear protective film includes the following steps:

[0011] S1. Input the protective film body, wherein the feeding direction of the protective film body is the first direction;

[0012] S2. The tear-off position of the protective film body or the tear-off film adhesive dispensing setting of the tear-off film body, wherein the position of the tear-off position is adapted to the fixed section;

[0013] S3. The tear film body is provided with a tear-off film at the point of breakage, and the tear-off film is still connected to the tear film body;

[0014] S4. Input the film-tearing body until the tear film and the tearing position coincide in the height direction. The feeding direction of the film-tearing body is the second direction, which is perpendicular to the first direction.

[0015] S5. Press down the tear film body and the protective film body to adhere. At the same time, the fixed section comes into contact with the adhesive on the tear position. The fixed section and the tear position are bonded and fixed by the squeezing rollers. Lift up the tear film body and the tear film separates from the tear film body. The tear film is connected to the surface of the protective film body through the fixed section.

[0016] S6. The protective film body continues to be fed and performs point-cutting operations, with the point-cutting cuts set adjacent to the fixed section.

[0017] A preferred technical solution is that the tear film body reciprocates in the second direction, and the tear film on the tear film body is disposed adjacent to each other.

[0018] The preferred technical solution is that the extrusion rollers stay at the tearing position for 5-10 seconds.

[0019] The preferred technical solution is that the fixed section is circular or elliptical, the glue dispensing position is located near the edge of the fixed section on the feeding side, and the running direction of the extrusion rollers is consistent with the first direction;

[0020] The glue forms a hemispherical shape after application and an elliptical shape after extrusion, which matches the elliptical fixing section; or the glue forms an ellipsoidal shape after application and a circular shape after extrusion, which matches the circular fixing section.

[0021] The preferred technical solution is as follows: In step S1, two protective film bodies, one upper and one lower, are simultaneously input; in step S2, adhesive is applied to the tear-off point of the lower protective film body; in step S3, the tear-off body has two layers, one upper and one lower, located between the upper and lower protective film bodies, and adhesive is applied to the fixed section of the tear-off film of the upper tear-off body; in step S5, the upper protective film body is pressed against the upper tear-off body, and the lower protective film body is pressed against the lower tear-off body, so that the tear-off film of the upper tear-off body is adhered to the upper protective film body, and the tear-off film of the lower tear-off body is adhered to the lower protective film body.

[0022] The advantages and beneficial effects of the present invention are as follows: The easy-tear protective film and its production process of the present invention are reasonably designed. By setting multiple tear-off films and point-cut slits on the protective film body, there is no need to design the position of the easy-tear slits for the product, which is highly versatile. The tear-off film is first adhered to the protective film body, and then the point-cut slit operation is carried out, which avoids the point-cut slits of the protective film body being pulled open when the tear-off film is separated from the tear-off film body, thus avoiding the waste of the protective film body. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the easy-tear protective film of the present invention;

[0024] Figure 2 This is a schematic diagram of step S1 in Example 1;

[0025] Figure 3 This is a schematic diagram of step S2 in Example 1;

[0026] Figure 4 This is a schematic diagram of step S3 in Example 1;

[0027] Figure 5 This is a schematic diagram of step S4 in Example 1;

[0028] Figure 6 This is a schematic diagram of step S6 in Example 1;

[0029] Figure 7 This is a schematic diagram of the structure of the tear film in Example 1, showing the film being torn off multiple times.

[0030] Figure 8 This is a structural schematic diagram of Example 2;

[0031] Figure 9 This is a schematic diagram of step S3 in Example 3;

[0032] Figure 10 This is a schematic diagram of step S5 in Example 3;

[0033] In the diagram: 1. Protective film body; 11. Point cut; 2. Tear film; 21. Fixed section; 22. Free section; 3. Tear film body; 4. Upper protective film body; 5. Lower protective film body; 6. Upper tear film body; 7. Lower tear film body; 8. Tear position; 9. Extrusion rollers; 10. Glue. Detailed Implementation

[0034] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0035] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "horizontal," "vertical," "top," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] Example 1

[0037] like Figure 1-7 As shown, the easy-tear protective film of Embodiment 1 includes a protective film body 1 and a tear-off film 2 disposed on the protective film body 1. The tear-off film 2 is provided in a plurality of parts, and the tear-off film 2 includes a fixed section 21 fixedly connected to the protective film body 1 and a free section 22 for easy pulling up the tear-off film 2. The protective film body 1 is provided with a plurality of point-cut slits 11, and the fixed section 21 is disposed adjacent to the point-cut slits 11.

[0038] With this design, the protective film body 1 is provided with multiple tear-off films 2 and point-cut slits 11 that cooperate with the tear-off films 2. Therefore, there is no need to calculate and set easy-tear openings for the product, which improves the versatility of the protective film body 1.

[0039] Specifically, the diameter of the fixed segment 21 is greater than the width of the free segment 22.

[0040] This design increases the contact area between the fixed section 21 and the protective film body 1, thereby improving the firmness of the connection between the tear-off film 2 and the protective film body 1.

[0041] Specifically, the point-cut 11 is arranged in a ring shape, and the outer and / or inner rings of the point-cut 11 are provided with a plurality of the tear-off films 2.

[0042] With this design, the point of breakage can be torn open from multiple directions.

[0043] A process for manufacturing easy-tear protective film includes the following steps:

[0044] S1. Input protective film body 1, wherein the feeding direction of the protective film body 1 is the first direction;

[0045] S2, the tear-off position 8 of the protective film body 1 or the tear-off film 2 of the tear-off film body 3 is dotted with adhesive, and the position of the tear-off position 8 is adapted to the fixed section 21;

[0046] S3. The tear film body 3 is provided with a tear film 2 at point 3, and the tear film 2 is still connected to the tear film body 3.

[0047] S4. Input the film-tearing body 3 until the tearing film 2 and the tearing position 8 coincide in the height direction. The feeding direction of the film-tearing body 3 is the second direction, which is perpendicular to the first direction.

[0048] S5. Press down the tear film body 3 and the protective film body 1 to adhere. At the same time, the fixed section 21 comes into contact with the glue on the tear position 8. The fixed section 21 and the tear position 8 are bonded and fixed by the squeezing roller 9. The tear film body 3 is lifted up, and the tear film 2 is separated from the tear film body 3. The tear film 2 is connected to the surface of the protective film body 1 through the fixed section 21.

[0049] S6. The protective film body 1 continues to be fed and performs point breaking operation. The point breaking cut 11 is set adjacent to the fixed section 21.

[0050] The extrusion roller 9 stays at the tearing position 8 for 5-10 seconds.

[0051] The tear film body 3 reciprocates in the second direction, and the tear film 2 on the tear film body 3 is disposed adjacent to each other.

[0052] This design improves the utilization rate of the tear film body 3 and avoids waste. The perforation rate of the tear film body 3 is greater than that of the protective film body 1, which facilitates the separation of the tear film 2 from the tear film body 3.

[0053] Example 2

[0054] like Figure 8 As shown, Example 2 is based on Example 1, with the following differences:

[0055] The point-cut 11 is arranged in an arc shape or a straight line, and the tear-off film 2 corresponds one-to-one with the point-cut 11.

[0056] Example 3

[0057] like Figure 9-10 As shown, Example 3 is based on Example 1, with the following differences:

[0058] The fixed section 21 is circular or elliptical, and the glue dispensing position is located near the edge of the feed side of the fixed section 21. The running direction of the extrusion rollers 9 is consistent with the first direction.

[0059] The glue 10 is hemispherical after application and elliptical after extrusion, which is compatible with the elliptical fixing section 21. Alternatively, the glue 10 is ellipsoidal after application and circular after extrusion, which is compatible with the circular fixing section 21.

[0060] In step S1, the upper protective film body 4 and the lower protective film body 5 are input simultaneously; in step S2, adhesive is applied to the tear-off point 8 of the lower protective film body 5; in step S3, the tear-off body has two layers, with the upper tear-off body 6 and the lower tear-off body 7 located between the upper protective film body 4 and the lower protective film body 5. Adhesive is applied to the fixed section of the tear-off film of the upper tear-off body 6, and adhesive is applied to the tear-off point of the lower protective film body 5; in step S5, the upper protective film body 4 is pressed onto the upper tear-off body 6, and the lower protective film body 5 is pressed onto the lower tear-off body 7, so that the tear-off film of the upper tear-off body 6 is adhered to the upper protective film body 4, and the tear-off film of the lower tear-off body 7 is adhered to the lower protective film body 5.

[0061] This design enables the simultaneous production of both protective film bodies 4, thereby improving production efficiency.

[0062] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A manufacturing process for producing easy-tear protective films, characterized in that, Includes the following steps: S1. Input protective film body (1), wherein the feeding direction of the protective film body (1) is the first direction; S2, the tear-off position (8) of the protective film body (1) or the tear-off film (2) of the tear-off body (3) is glued, and the position of the tear-off position (8) is adapted to the fixed section (21); S3. The tear film body (3) is provided with a tear film (2) at a point, and the tear film (2) is still connected to the tear film body (3); S4. Input the film-tearing body (3) until the tear film (2) and the tearing position (8) coincide in the height direction. The feeding direction of the film-tearing body (3) is the second direction, which is perpendicular to the first direction. S5. Press down the tear film body (3) and the protective film body (1) to adhere. At the same time, the fixed section (21) contacts the glue (10) on the tear position (8). By squeezing the roller (9), the fixed section (21) and the tear position (8) are bonded and fixed. The tear film body (3) is lifted up, and the tear film (2) is separated from the tear film body (3). The tear film (2) is connected to the surface of the protective film body (1) through the fixed section (21). S6. The protective film body (1) continues to be fed and performs point breaking operation. The point breaking cut (11) is set adjacent to the fixed section (21). The easy-tear protective film includes a protective film body (1) and a tear-off film (2) disposed on the protective film body (1). The tear-off film (2) is provided in a plurality of parts. The tear-off film (2) includes a fixed section (21) fixedly connected to the protective film body (1) and a free section (22) for easy pulling up the tear-off film (2). The protective film body (1) is provided with a plurality of point-cut slits (11). The fixed section (21) is disposed adjacent to the point-cut slits (11).

2. The easy-tear protective film manufacturing process according to claim 1, characterized in that, The diameter of the fixed segment (21) is greater than the width of the free segment (22).

3. The easy-tear protective film production process according to claim 1, characterized in that, The point break cut (11) is arranged in a ring shape, and the outer and / or inner rings of the point break cut (11) are provided with a plurality of the tear film (2).

4. The easy-tear protective film production process according to claim 1, characterized in that, The point break cut (11) is arranged in an arc shape or a straight line, and the tear film (2) corresponds one-to-one with the point break cut (11).

5. The easy-tear protective film production process according to claim 1, characterized in that, The tear film body (3) reciprocates in the second direction, and the tear film (2) on the tear film body (3) is disposed adjacent to each other.

6. The easy-tear protective film manufacturing process according to claim 1, characterized in that, The extrusion rollers (9) remain at the tearing position (8) for 5-10 seconds.

7. The easy-tear protective film manufacturing process according to claim 1, characterized in that, The fixed section (21) is circular or elliptical, and the glue dispensing position is located near the edge of the feed side of the fixed section (21). The running direction of the extrusion rollers (9) is consistent with the first direction. The glue (10) is hemispherical after application and elliptical after extrusion, which is compatible with the elliptical fixing section (21). Alternatively, the glue (10) is ellipsoidal after application and circular after extrusion, which is compatible with the circular fixing section (21).

8. The easy-tear protective film manufacturing process according to claim 1, characterized in that, In step S1, the upper protective film body (4) and the lower protective film body (5) are input simultaneously; in step S2, adhesive is applied to the tearing position (8) of the lower protective film body (5); in step S3, the tearing film body is provided with upper and lower layers, the upper tearing film body (6) and the lower tearing film body (7) are located between the upper protective film body (4) and the lower protective film body (5), adhesive is applied to the fixed section of the tearing film of the upper tearing film body (6), and adhesive is applied to the tearing position of the lower protective film body (5); in step S5, the upper protective film body (4) is pressed onto the upper tearing film body (6), and the lower protective film body (5) is pressed onto the lower tearing film body (7), so that the tearing film of the upper tearing film body (6) is bonded to the upper protective film body (4), and the tearing film of the lower tearing film body (7) is bonded to the lower protective film body (5).

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