Cotton packaging roll film and preparation method thereof

Abstract

A cotton packaging roll film comprising a roll film base material formed by a plurality of packaging sections that are connected end to end; the packaging section comprises an adhesive area and a non-adhesive area connected with the adhesive area; the adhesive area of a previous packaging section is connected to one end of the non-adhesive area of a later packaging section, wherein the said end of the non-adhesive area is a Z-shaped folded end; a detachable bonding structure is arranged between the two end surfaces of the recession of the folded end close to the middle portion of the adhesive area; a tearing line used for separation during packaging is arranged at the junction of the adhesive area of a previous packaging section and the non-adhesive area of a later packaging section.

Claims

1. A cotton packaging roll film, comprising: a roll film base material formed by a plurality of packaging sections (1) that are connected end to end, wherein the packaging section (1) comprises an adhesive area (11) and a non-adhesive area (12) connected with the adhesive area (11), wherein the adhesive area (11) of a previous packaging section (1) is connected to one end of the non-adhesive area (12) of a later packaging section (1), wherein the said end of the non-adhesive area (12) is a Z-shaped folded end (111), wherein a detachable bonding structure (2) is arranged between the two end surfaces of the recession of the folded end (111) close to the middle portion of the adhesive area (11), wherein the detachable bonding structure (2) comprises a first adhesive layer (21), a detachable layer (22) and a second adhesive layer (23), wherein the first adhesive layer and the second adhesive layer are respectively located on the two end surfaces of the recession of the folded end (111) close to the middle portion of the adhesive area (11), wherein the detachable layer is located between the first adhesive layer and the second adhesive layer, wherein a tearing line (3) used for separation during packaging is arranged at the junction of the adhesive area (11) of a previous packaging section (1) and the non-adhesive area (12) of a later packaging section (1).

2. The cotton packaging roll film of claim 1, wherein on the two end surfaces of the recession of the folded end (111) close to the middle portion of the adhesive area (11), the second adhesive layer (23) is located on the end surface close to the middle portion of the adhesive area (11).

3. The cotton packaging roll film of claim 1, wherein a plurality of detachable bonding structures (2) are arranged between the two end surfaces of the recession of the folded end (111) close to the middle portion of the adhesive area (11), and the plurality of detachable bonding structures (2) are distributed in the length direction or width direction of the roll film base material.

4. The cotton packaging roll film of claim 1, wherein the tearing line (3) is located at the end portion of the non-adhesive area (12) of a later packaging section (1) close to the adhesive area (11) of a previous packaging section (1), wherein after the tearing line (3) is torn apart during packaging, the portion of the non-adhesive area (12) of a later packaging section (1) that is located between the end portion and the tearing line (3) is connected with the adhesive area (11) of a previous packaging section (1).

5. The cotton packaging roll film of claim 1, wherein the tearing line (3) is located at the junction of the non-adhesive area (12) of a later packaging section (1) and the adhesive area (11) of a previous packaging section (1).

6. The cotton packaging roll film of claim 1, wherein the tearing line (3) is a broken line with easy-to-tear holes or a holt-melt joint.

7. The cotton packaging roll film of claim 1, wherein the tearing line (3) is obliquely arranged, and the included angle formed between the tearing line (3) and the width direction of the roll film base material is 1-5 degrees, wherein the portions of the roll film base material located on the two sides of the tearing line (3) have a thickness greater than that of the other portions of the roll film base material.

8. A method for preparing the cotton packaging roll film of claim 1, comprising the steps of: S1: preparing a roll film base material: forming a plurality of adhesive areas (11) and non-adhesive areas (12) that are arranged at intervals on the roll film base material, wherein each adhesive area (11) and an adjacent non-adhesive area (12) form a packaging section (1); S2: tearing off the release paper on one side of a double-sided adhesive tape, and bonding one end of the adhesive area (11) of a previous packaging section (1) close to the adhesive area (11) of a later packaging section (1) with the double-sided adhesive tape, and coating a adhesive on the release paper on the other side of the double-sided adhesive tape, thereby forming a first adhesive layer (21), wherein the adhesive on the double-sided adhesive tape forms a second adhesive layer (23), and the release paper on the other side of the double-sided adhesive tape forms a detachable layer (22); S3: folding the end portion of a previous packaging section (1) to form a Z-shaped folded end (111), thereby allowing the double-sided adhesive tape to be located on an end surface of the recession of the folded end (111) close to the middle portion of the adhesive area (11), and allowing the first adhesive layer (21) to be bonded to the other end surface of the recession of the folded end (111) close to the middle portion of the adhesive area (11); S4: forming a tearing line (3) at the junction of the adhesive area (11) of a previous packaging section (1) and the non-adhesive area (12) of a later packaging section (1).

9. The method for preparing the cotton packaging roll film of claim 8, wherein step S1 specifically comprises the steps of: coating a third adhesive layer on the roll film base material, thereby forming adhesive areas (11) at intervals on the same side of the roll film base material, and forming non-adhesive areas (12) between every two adjacent adhesive areas (11), wherein each adhesive area (11) and an adjacent non-adhesive area (12) form a packaging section (1), wherein in step S4, a tearing line (3) is formed at the junction of the non-adhesive area (12) of a later packaging section (1) and the adhesive area (11) of a previous packaging section (1).

10. The method for preparing the cotton packaging roll film of claim 8, wherein step S1 specifically comprises the steps of: bonding an adhesive area (11) formed by an adhesive film to a non-adhesive area (12) formed by a non-adhesive film through an adhesive tape (4), thereby forming a packaging section (1), and then bonding the adhesive area (11) of a previous packaging section (1) to the non-adhesive area (12) of a later packaging section (1) through an adhesive tape (4), thereby forming a roll film base material, wherein in step S4, a tearing line (3) is formed at the end portion of the non-adhesive area (12) of a later packaging section (1) close to the adhesive area (11) of a previous packaging section (1).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a structural diagram of embodiment 1 (merely for illustrating the connection portion between two adjacent packaging sections);

(2) FIG. 2 is a schematic diagram illustrating the connection between the adjacent packaging sections of embodiment 1;

(3) FIG. 3 is a schematic diagram for illustrating a partial structure of the detachable bonding structure of embodiment 1;

(4) FIGS. 4, 5, 6 and 7 are schematic diagrams for illustrating the packaging process of embodiment 1 (FIGS. 4 and 5 are two principle diagrams for illustrating the separation of two packaging sections);

(5) FIG. 8 is a schematic diagram for illustrating a partial structure of the detachable bonding structure of embodiment 2;

(6) FIG. 9 is a structural diagram of embodiment 3;

(7) FIG. 10 is a structural diagram of embodiment 4;

(8) FIG. 11 is a schematic diagram for illustrating a partial structure of the detachable bonding structure of embodiment 4;

(9) FIG. 12 is a schematic diagram illustrating the connection between the adjacent packaging sections of embodiment 5;

(10) FIG. 13 is a structural diagram of embodiment 6;

(11) FIG. 14 is a schematic diagram illustrating the connection between the adjacent packaging sections of embodiment 6;

(12) FIG. 15 is a structural diagram of embodiment 7;

(13) FIG. 16 is a schematic diagram for illustrating a partial structure of the detachable bonding structure of embodiment 7.

MARKING INSTRUCTIONS OF THE DRAWINGS

(14) 1—Packaging Section, 11—Adhesive Area, 111—Folded end, 12—Non-adhesive Area, 2—Detachable Bonding Structure, 21—Strong Adhesive Layer, 22—Detachable Layer, 23—Adhesive Layer, 3—Tearing Line, 4—Adhesive Tape

DETAILED DESCRIPTION OF THE INVENTION

(15) Drawings and detailed embodiments are combined hereinafter to elaborate the technical principles of the present invention.

(16) Embodiment 1: a cotton packaging roll film, as shown in FIGS. 1-2, comprises a roll film base material formed by a plurality of packaging sections 1 that are connected end to end. The packaging section 1 comprises an adhesive area 11 and a non-adhesive area 12 connected with the adhesive area 11. A plurality of packaging sections 1 are integrally arranged, and the adhesive area 11 and the non-adhesive area 12 of the packaging section 1 are integrally arranged.

(17) As shown in FIGS. 2-3, the adhesive area 11 of a previous packaging section 1 is connected to one end of the non-adhesive area 12 of a later packaging section 1, wherein the said end of the non-adhesive area 12 is a Z-shaped folded end 111. A detachable bonding structure 2 is arranged between the two end surfaces of the recession of the folded end 111 close to the middle portion of the adhesive area 11. The detachable bonding structure 2 comprises a strong adhesive layer 21, a detachable layer 22 and an adhesive layer 23. On the two end surfaces of the recession of the folded end 111 close to the middle portion of the adhesive area 11, the adhesive layer 23 is located on the end surface close to the middle portion of the adhesive area 11, and the strong adhesive layer 21 is located on the end surface far away from the middle portion of the adhesive layer. The detachable layer 22 is located between the strong adhesive layer 21 and the adhesive layer 23, and the detachable layer 22 can be detached from the adhesive layer 23. There's only one detachable bonding structure 2, and the detachable bonding structure 2 extends along the width direction of the adhesive area 11.

(18) As shown in FIGS. 1-3, a tearing line 3 used for separation during packaging is arranged at the junction of the adhesive area 11 of a previous packaging section 1 and the non-adhesive area 12 of a later packaging section 1. The tearing line 3 is located at the junction of the non-adhesive area 12 of a later packaging section 1 and the adhesive area 11 of a previous packaging section 1. The tearing line 3 extends along the width direction of the roll film base material, and the tearing line 3 is a broken line provided with easy-to-tear holes.

(19) The implementation principle is as follows: with reference to FIGS. 2-7, the detachable bonding structure 2 comprises a strong adhesive layer 21, a detachable layer 22 and an adhesive layer 23. When the roll film is wound on a rolling drum, the detachable layer 22 covers the adhesive layer 23, thereby preventing different layers of the roll film wound on the rolling drum from being bonded together. However, when the roll film is unrolled for packaging the cotton, the detachable layer 22 can be peeled off and completed detached from the adhesive layer 23 at the end of a cycle of the packaging section 1. The adhesive layer 23 is used for being bonded to the adhesive area 11 of the next layer for sealing at the end of the cycle of the packaging section 1. When the cycle of the packaging section 1 is ended, the rolling drum stops, and the wrapped cotton can tear the tearing line 3 due to the tension force generated by rotating inertia, thereby separating the packaging sections 1 during packaging. When the roll film body is torn along the tearing line 3, the portions of the roll film body at the two ends of the tearing line 3 deform under the action of the tension force. Due to the arrangement of the folded end 111 of the adhesive area 11, a certain distance exists between the adhesive layer 23 and the end edge of the adhesive area 11, thus preventing the adhesive area 11 on the adhesive layer from easily deforming. In this way, the adhesive layer 23 is kept flat, and the bonding effect of the adhesive layer 23 isn't affected.

(20) Embodiment 2: a cotton packaging roll film, as shown in FIG. 8, has following features differing from that of embodiment 1: a plurality of detachable bonding structures 2 are arranged in this embodiment, wherein each detachable bonding structure 2 extends along the width direction of the roll film base material, and the plurality of detachable bonding structures 2 are distributed in the length direction of the roll film base material.

(21) Embodiment 3: a cotton packaging roll film, as shown in FIG. 9, has following features differing from that of embodiment 1: a plurality of detachable bonding structures 2 are arranged in this embodiment, wherein each detachable bonding structure 2 extends along the length direction of the roll film base material, and the plurality of detachable bonding structures 2 are distributed in the width direction of the roll film base material.

(22) Embodiment 4: a cotton packaging roll film, as shown in FIGS. 10-11, has following features differing from that of embodiment 2: the tearing line 3 is obliquely arranged, and the included angle formed between the tearing line 3 and the width direction of the roll film base material is 2 degrees; meanwhile, the thickness of the portion of the adhesive area 11 close to the tearing line 3 is greater than that of the rest of the adhesive area 11, and the thickness of the portion of the non-adhesive area 12 close to the tearing line 3 is greater than that of the rest of the non-adhesive area 12 (the end portion of the folded end 111).

(23) Embodiment 5: a cotton packaging roll film, as shown in FIG. 12, comprises a roll film base material formed by a plurality of packaging sections 1 that are connected end to end; the packaging section 1 comprises an adhesive area 11 and a non-adhesive area 12 connected with the adhesive area 11; the adhesive area 11 and the non-adhesive area 12 of the adjacent packaging sections 1 are bonded through an adhesive tape 4, and the adhesive area 11 and the non-adhesive area 12 of the packaging section 1 are bonded through an adhesive tape 4.

(24) As shown in FIG. 12, the adhesive area 11 of a previous packaging section 1 is connected to one end of the non-adhesive area 12 of a later packaging section 1, wherein the said end of the non-adhesive area 12 is a Z-shaped folded end 111. A detachable bonding structure 2 is arranged between the two end surfaces of the recession of the folded end 111 close to the middle portion of the adhesive area 11. The detachable bonding structure 2 of this embodiment is the same as that of embodiment 1.

(25) As shown in FIG. 12, a tearing line 3 used for separation during packaging is arranged at the junction of the adhesive area 11 of a previous packaging section 1 and the non-adhesive area 12 of a later packaging section 1. The tearing line 3 is located at the end portion of the non-adhesive area 12 of a later packaging section 1 close to the adhesive area 11 of a previous packaging section 1. After the tearing line 3 is torn apart, the portion of the non-adhesive area 12 of a later packaging section 1 that is located between the end portion and the tearing line 3 is connected with the adhesive area 11 of a previous packaging section 1. The tearing line 3 extends along the width direction of the roll film base material, and the tearing line 3 is a broken line provided with easy-to-tear holes.

(26) Embodiment 6: a cotton packaging roll film, as shown in FIGS. 13-14, comprises a roll film base material formed by a plurality of packaging sections 1 that are connected end to end; the packaging section 1 comprises an adhesive area 11 and a non-adhesive area 12 connected with the adhesive area 11; the adhesive area 11 and the non-adhesive area 12 of the packaging section 1 are bonded through an adhesive tape 4.

(27) As shown in FIGS. 13-14, the adhesive area 11 of a previous packaging section 1 is connected to one end of the non-adhesive area 12 of a later packaging section 1, wherein the said end of the non-adhesive area 12 is a Z-shaped folded end 111. A detachable bonding structure 2 is arranged between the two end surfaces of the recession of the folded end 111 close to the middle portion of the adhesive area 11. The detachable bonding structure 2 of this embodiment is the same as that of embodiment 1.

(28) As shown in FIGS. 13-14, a tearing line 3 used for separation during packaging is arranged at the junction of the adhesive area 11 of a previous packaging section 1 and the non-adhesive area 12 of a later packaging section 1. The tearing line 3 is a hot-melt joint formed by hot-melt connection at the junction of the adhesive area 11 of a previous packaging section 1 and the non-adhesive area 12 of a later packaging section 1.

(29) Embodiment 7: a cotton packaging roll film, as shown in FIGS. 15-16, has following features differing from that of embodiment 6: the tearing line 3 is obliquely arranged, and the included angle formed between the tearing line 3 and the width direction of the roll film base material is 5 degrees; meanwhile, the thickness of the portion of the adhesive area 11 close to the tearing line 3 is greater than that of the rest of the adhesive area 11, and the thickness of the portion of the non-adhesive area 12 close to the tearing line 3 is greater than that of the rest of the non-adhesive area 12. A plurality of detachable bonding structures 2 are arranged in this embodiment, wherein each detachable bonding structure 2 extends along the width direction of the roll film base material, and the plurality of detachable bonding structures 2 are distributed in the length direction of the roll film base material.

(30) Embodiment 8: a method for preparing the cotton packaging roll film of embodiment 1, comprising the steps of:

(31) S1: preparing a roll film base material: coating an adhesive layer on the roll film base material, thereby forming adhesive areas 11 at intervals on the same side of the roll film base material; forming non-adhesive areas 12 between every two adjacent adhesive areas 11, wherein each adhesive area 11 and an adjacent non-adhesive area 12 form a packaging section 1;

(32) S2: tearing off the release paper on one side of a double-sided adhesive tape, and bonding one end of the adhesive area 11 of a previous packaging section 1 close to the adhesive area 11 of a later packaging section 1 with the double-sided adhesive tape; coating a strong adhesive on the release paper on the other side of the double-sided adhesive tape, thereby forming a strong adhesive layer 21, wherein the adhesive on the double-sided adhesive tape forms an adhesive layer 23, and the release paper on the other side of the double-sided adhesive tape forms a detachable layer 22;

(33) S3: folding the end portion of a previous packaging section 1 to form a Z-shaped folded end 111, thereby allowing the double-sided adhesive tape to be located on an end surface of the recession of the folded end 111 close to the middle portion of the adhesive area 11, and allowing the strong adhesive layer 21 to be bonded to the other end surface of the recession of the folded end 111 close to the middle portion of the adhesive area 11;

(34) S4: forming a tearing line 3 at the junction of the adhesive area 11 of a previous packaging section 1 and the non-adhesive area 12 of a later packaging section 1, wherein the tearing line 3 is a broken line with easy-to-tear holes that are machined at the junction of the adhesive area 11 of a previous packaging section 1 and the non-adhesive area 12 of a later packaging section 1 through a laser drilling machine.

(35) Implementation effect: through the arrangement of the double-sided adhesive tape, a detachable layer 22 and an adhesive layer 21 are formed; the raw material double-sided adhesive tapes can be directly purchased and conveniently processed; moreover, a strong adhesive is coated on the other side of the double-sided adhesive tape to form a strong adhesive layer 21, and the end portion of a previous packaging section is folded into a Z-shaped folded end 111, thus allowing the double-sided adhesive tape to be located on an end surface of the recession of the folded end 111 close to the middle portion of the adhesive area 11, and allowing the strong adhesive layer 21 to be bonded to the other end surface of the recession of the folded end 111 close to the middle portion of the adhesive area 11; at this point, compared with directly coating a strong adhesive on the adhesive area 11 to form strong adhesive layer 21, the situation that the overlapped portion of the adhesive area 11 is bonded by the strong adhesive layer 21 when folding the end portion of a previous packaging section 1 due to the problem that the detachable layer is not aligned with the strong adhesive layer 21 can be avoided.

(36) Embodiment 9: a method for preparing a plastic film of embodiment 5, comprising the steps of:

(37) S1: bonding an adhesive area 11 formed by an adhesive film to a non-adhesive area 12 formed by a non-adhesive film through an adhesive tape 4, thereby forming a packaging section 1, and then bonding the adhesive area 11 of a previous packaging section 1 to the non-adhesive area 12 of a later packaging section 1 through an adhesive tape, thereby forming a roll film base material;

(38) S2: tearing off the release paper on one side of a double-sided adhesive tape, and bonding one end of the adhesive area 11 of a previous packaging section 1 close to the adhesive area 11 of a later packaging section 1 with the double-sided adhesive tape; coating a strong adhesive on the release paper on the other side of the double-sided adhesive tape, thereby forming a strong adhesive layer 21, wherein the adhesive on the double-sided adhesive tape forms an adhesive layer 23, and the release paper on the other side of the double-sided adhesive tape forms a detachable layer 22;

(39) S3: folding the end portion of a previous packaging section 1 to form a Z-shaped folded end 111, thereby allowing the double-sided adhesive tape to be located on an end surface of the recession of the folded end 111 close to the middle portion of the adhesive area 11, and allowing the strong adhesive layer 21 to be bonded to the other end surface of the recession of the folded end 111 close to the middle portion of the adhesive area 11;

(40) S4: forming a tearing line 3 at the end portion of the non-adhesive area 12 of a later packaging section 1 close to the adhesive area 11 of a previous packaging section 1, wherein the tearing line 3 is a hot-melt joint formed by connecting two packaging sections 1 through a hot-melting equipment.

(41) The above embodiments are merely an explanation of the present invention and are not intended to limit the present invention. After reading the specification, those skilled in the art can make modifications according to needs without paying creative labor. What falls into the scope of the claims of the present invention is protected by the Patent Law.