An easy-to-tear double-ended pull wire

Abstract

The present invention discloses an easy-to-tear double-ended pull cord, comprising a winding core and an unsealing pull cord wound around the outer periphery of the winding core. The unsealing pull cord is wound around the winding core to form a reciprocating winding structure or a single-disc winding structure. The unsealing pull cord is provided with a pre-indentation extending along the length of the unsealing pull cord. The unsealing pull cord is torn along the pre-indentation to form two pull cords. As a result, during the winding and unwinding process, since the same unsealing pull cord does not cause tension inconsistency when passing through the equipment, when contacting the package to be combined, the unsealing pull cord is separated from one line into two lines to perform re-pulling on both sides of the same package, thereby achieving the purpose of unsealing both sides of the same package, effectively ensuring the flatness of the re-pulling line of the package, and reducing packaging costs.

Description

Technical Field

[0001] The invention belongs to the technical field of packaging, and in particular relates to an easy-to-tear double-ended drawstring. Background Art

[0002] Drawstrings are widely used in industries such as food, tobacco, and pharmaceuticals, facilitating the opening of packaging while also enhancing aesthetics and identification. Drawstrings typically utilize reciprocating or single-reel reels, typically placed at the end of the packaging where the product is designed to be opened. In recent years, the market's shift towards diversification has led to increased demand for packaging that can be opened from both sides, offering greater convenience than single-side openings.

[0003] If the existing one-line reciprocating winding and one-line single-disc winding are to be used to unseal both sides of the same package, two rolls of pulling wire need to be composited on the same packaging layer. When the pulling wire composites the packaging layer, due to the influence of various aspects such as the equipment's unwinding tension, wheel passing, unwinding distance, rewinding tension, rewinding wire distance, and rewinding length, the two pulling wires on the same package are out of sync, causing the pulling wire and the packaging to wrinkle and deform, affecting the appearance and even causing the packaging layer to be scrapped; another method is to re-pull the wire twice on the same package, which will increase production costs and it is difficult to ensure the flatness of the re-pull wire of the packaging. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an easy-tear double-ended pull string capable of realizing double-sided unsealing of the same package.

[0005] In order to achieve the above-mentioned purpose, the present invention provides an easy-to-tear double-ended pull wire, which includes a winding core and a tearing pull wire wound on the outer circumference of the winding core. The winding layer structure formed by winding the tearing pull wire on the winding core is a reciprocating winding structure or a single-disc winding structure. The tearing pull wire is provided with a pre-indentation extending along the length direction of the tearing pull wire. The tearing pull wire is torn along the pre-indentation to form two pull wires.

[0006] As a preferred embodiment of the present invention, the tearing string includes a base material layer, an adhesive layer and an anti-sticking layer. The adhesive layer is coated on the surface of the base material layer, and the anti-sticking layer is coated on the surface of the adhesive layer away from the base material layer.

[0007] As a preferred embodiment of the present invention, the substrate layer is paper or plastic film, and its thickness is 33 μm.

[0008] As a preferred embodiment of the present invention, the adhesive layer is a pressure-sensitive adhesive with a thickness of 1 μm to 30 μm.

[0009] As a preferred embodiment of the present invention, the coating amount of the anti-sticking layer is 0.1 g / m 2 ~3g / m2 .

[0010] As a preferred solution of the present invention, the pre-indentation is provided on the surface of the substrate layer away from the adhesive layer, and the depth of the pre-indentation is 60% to 90% of the thickness of the substrate layer.

[0011] As a preferred solution of the present invention, the pre-indentation is formed by knife or laser cutting.

[0012] As a preferred embodiment of the present invention, the two tear lines formed after the tear line is torn along the pre-indentation have the same width.

[0013] As a preferred embodiment of the present invention, the width of the unsealing pull line is 0.8 cm to 40 cm.

[0014] As a preferred embodiment of the present invention, the winding core is a paper core or a plastic core.

[0015] The easy-to-tear double-ended tear string provided by the present invention has the following beneficial effects compared with the prior art: by arranging a pre-indentation on the unsealing tear string, the unsealing tear string is torn into two along the pre-indentation to form a one-line double-ended unsealing tear string; during the winding and unwinding process, since the same unsealing tear string passes through the equipment, there will be no tension inconsistency; therefore, when contacting the package to be compounded, the unsealing tear string is separated from one line into two lines to carry out re-pulling on both sides of the same package, thereby achieving the purpose of unsealing on both sides of the same package, effectively ensuring the flatness of the re-pulling line of the package, and reducing the packaging cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the structural schematic diagrams of an easy-to-tear double-ended pull wire provided by the present invention;

[0017] Figure 2 This is the second structural diagram of an easy-to-tear double-ended pull wire provided by the present invention;

[0018] Figure 3 It is a cross-sectional view of the unpacking pull line.

[0019] Markings in the figure: 1, winding core; 2, unpacking pull line; 3, pre-indentation; 21, base material layer; 22, adhesive layer; 23, anti-sticking layer. DETAILED DESCRIPTION

[0020] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. used in the present invention to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. These terms are used only to facilitate the description of the present invention and to simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] like Figure 1 and Figure 2 As shown, an easy-to-tear double-ended pull cord according to a preferred embodiment of the present invention comprises a winding core 1 and a tearing pull cord 2 wound around the outer periphery of the winding core 1. The winding layer structure formed by the tearing pull cord 2 wound on the winding core 1 is a reciprocating winding structure (see Figure 1 ) or single reel winding structure (see Figure 2 ), the tearing string 2 is provided with a pre-indentation 3 extending along the length direction of the tearing string 2, and the tearing string 2 is torn along the pre-indentation 3 to form two strings.

[0023] Therefore, according to an embodiment of the present invention, an easy-to-tear double-ended pull wire is provided on the unsealing pull wire 2, which is torn into two along the pre-indentation 3 to form a one-line double-ended unsealing pull wire 2. During the winding and unwinding process, since the same unsealing pull wire 2 passes through the equipment, there will be no tension inconsistency. Therefore, when contacting the package to be compounded, the unsealing pull wire 2 is separated from one line into two lines to carry out re-pulling on both sides of the same package, thereby achieving the purpose of unsealing on both sides of the same package, effectively ensuring the flatness of the re-pulling line of the package, and reducing the packaging cost.

[0024] For example, Figure 3 As shown, the tearing string 2 includes a base material layer 21, an adhesive layer 22, and a release layer 23. The adhesive layer 22 is coated on the surface of the base material layer 21, and the release layer 23 is coated on the surface of the adhesive layer 22 away from the base material layer 21. In this embodiment, the base material layer 21 is paper or plastic film with a thickness of 33 μm; the adhesive layer 22 is a pressure-sensitive adhesive with a thickness of 1 μm to 30 μm. The adhesive layer 22 can bond the base material layer 21 and the release layer 23 together; the coating amount of the release layer 23 is 0.1 g / m 2 ~3g / m 2 , which can effectively prevent the unsealing pull lines 2 from sticking together during winding.

[0025] Exemplarily, the pre-indentation 3 is provided on the surface of the substrate layer 21 away from the adhesive layer 22 , and the depth of the pre-indentation 3 is 60% to 90% of the thickness of the substrate layer 21 to facilitate tearing.

[0026] Exemplarily, the pre-indentation 3 is formed by cutting with a knife or laser, and the process is simple.

[0027] Exemplarily, the widths of the two tear lines formed after the tear line 2 is torn along the pre-indentation 3 are the same. In this embodiment, the width of the tear line 2 is 0.8 cm to 40 cm.

[0028] Exemplarily, the winding core 1 is a paper core or a plastic core.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An easy-to-tear double-ended cable, characterized by: It includes a winding core and an unsealing pull line wound on the outer circumference of the winding core, the winding layer structure formed by the unsealing pull line being wound on the winding core is a reciprocating winding structure or a single-disc winding structure, the unsealing pull line is provided with a pre-indentation extending along the length direction of the unsealing pull line, and the unsealing pull line forms two pull lines after being torn along the pre-indentation; the unsealing pull line includes a base material layer, an adhesive layer and an anti-sticking layer, the adhesive layer is coated on the surface of the base material layer, and the anti-sticking layer is coated on the surface of the adhesive layer away from the base material layer; the pre-indentation is arranged on the surface of the base material layer away from the adhesive layer, and the depth of the pre-indentation is 60% to 90% of the thickness of the base material layer.

2. The easily tearable double-ended cable according to claim 1, characterized in that: The substrate layer is paper or plastic film, and has a thickness of 33 μm.

3. The easily tearable double-ended cable according to claim 1, characterized in that: The adhesive layer is a pressure-sensitive adhesive with a thickness of 1 μm to 30 μm.

4. The easily tearable double-ended cable according to claim 2, characterized in that: The coating amount of the anti-sticking layer is 0.1 g / m 2 ~3g / m 2 .

5. The easily tearable double-ended cable according to claim 1, characterized in that: The pre-indentation is formed by knife or laser cutting.

6. The easily tearable double-ended cable according to claim 1, characterized in that: The widths of the two tear lines formed after the tear line is torn along the pre-indentation are the same.

7. The easily tearable double-ended cable according to claim 1, characterized in that: The width of the unsealing pull line is 0.8 cm to 40 cm.

8. The easily tearable double-ended cable according to claim 1, characterized in that: The winding core is a paper core or a plastic core.

Images