Plastic cosmetic bag and preparation method thereof

Abstract

A plastic cosmetic bag comprises an annular bag body and two side end covers connected with the two sides of the annular bag body in a sealed mode respectively, the annular bag body and the side end covers form a storage cavity used for storing objects, the annular bag body is of a sheet-shaped annular structure, a zipper extending in the circumferential direction is arranged in the middle of the annular bag body, and the zipper is used for opening the storage cavity. The side end cover is composed of a film material cover and an annular elastic frame fixedly connected with the outer edge of the film material cover, and the annular elastic frame is made of an integrally-formed annular elastic material.

Description

Technical Field

[0001] The invention relates to the field of cosmetic bags, and in particular to a plastic cosmetic bag and a preparation method thereof. Background Art

[0002] The existing plastic cosmetic bag includes an annular bag body and two side end covers respectively sealingly connected to the two sides of the annular bag body, wherein the side end covers are generally composed of a film cover and an annular frame fixedly connected to the outer edge of the film cover. The annular frame is formed by wrapping a strip of plastic around the outer edge of the annular bag body so that the strip of plastic is attached to the ends to form an annular structure, and then cutting off the excess part. Since the annular frame of this structure is formed by cutting and assembling, there are the following problems: First, there must be corresponding cutting edges at the joints of the ends. In actual use, the strip of plastic often detaches from here, which shortens the life of the product. Second, first of all, the existence of the splicing gap will cause a shortcoming in the integrity of the product itself; secondly, since the two annular frames have corresponding splicing interfaces, in the actual assembly process, the two splicing interfaces are often not completely in a corresponding state up and down, which will cause the two splicing interfaces to be misaligned, giving users a sense of inferior quality and significantly affecting the overall aesthetics of the product. Third, each time the processing personnel prepare the annular frame, they need to surround the strip plastic of each annular frame, and they also need to cover the joints of the strip plastic with corresponding protective film materials, otherwise the connection stability of the joints cannot be maintained. The processing steps are relatively cumbersome, and the cut strip plastic is also seriously wasted. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a plastic cosmetic bag and a preparation method thereof: A plastic cosmetic bag comprises an annular bag body and two side end covers respectively sealed and connected to the two sides of the annular bag body, the annular bag body and the side end covers constitute a storage cavity for storing objects, the annular bag body is a sheet-like annular structure, a zipper extending in the circumferential direction is provided in the middle of the annular bag body, and the zipper is used to open the storage cavity; the side end covers are composed of a film cover and an annular elastic frame fixedly connected to the outer edge of the film cover, and the annular elastic frame is made of an integrally formed annular elastic material.

[0004] Preferably, the annular elastic frame includes an outer convex ring and a connecting flange integrally connected to the lower end of the outer convex ring, the outer convex ring is in the shape of a circular ring or an elliptical ring, the cross section of the outer convex ring is in the shape of a circle or an elliptical structure, the cross section of the connecting flange is in the shape of a sheet, the outer edge of the membrane cover is integrally extended with an annular arc-shaped connecting portion, the lower end of the arc-shaped connecting portion is hot-pressed and connected to the end of the annular bag body, the outer side of the arc-shaped connecting portion is hot-pressed and connected to the connecting flange, and the outer surface of the arc-shaped connecting portion is abutted and adapted with the inner ring surface of the outer convex ring. The outer convex ring of the annular elastic frame mainly functions to form a snap-fitting shape for the circular or elliptical structure of the entire cosmetic bag to prevent the cosmetic bag from deforming during use. The connecting flange functions to fix the arc-shaped connecting portion to prevent the annular elastic frame from falling off.

[0005] Preferably, the connecting flange is annular in structure as a whole, and the inner annular surface or the lower end of the connecting flange is hot-pressed to cover the connection between the arc-shaped connecting part and the annular bag body, and the inner annular surface of the connecting flange is adapted to the outer surface of the arc-shaped connecting part, and the connecting flange has a corresponding convergence effect on the arc-shaped connecting part. The connection stability between the annular elastic frame and the arc-shaped connecting part is significantly improved by hot-pressing the inner annular surface of the connecting flange and the outer edge of the film cover, and the connection stability between the arc-shaped connecting part and the annular bag body is further improved by covering the connection between the arc-shaped connecting part and the annular bag body. In addition, the connecting flange has a corresponding convergence effect on the arc-shaped connecting part, avoiding local deformation of the arc-shaped connecting part.

[0006] Preferably, the outer convex ring is composed of a flexible metal wire ring and an annular rubber sleeve covering the outer periphery of the flexible metal wire ring, the inner side surface of the outer convex ring is partially connected with the connecting flange, the connecting flange is fixedly connected to the arc-shaped connecting part, and the outer convex ring can be turned outward relative to the arc-shaped connecting part through the connecting flange, and one outer convex ring or two adapted outer convex rings are turned outward to form a handle of a plastic cosmetic bag.

[0007] Preferably, the outer surface of the arc-shaped connecting part is fixedly connected with a first magnetic connecting ring, the first magnetic connecting ring is made of rubber magnetic sheet material, the first magnetic connecting ring is provided with an arc-shaped notch portion which is embedded in the connecting flange, the first magnetic connecting ring is fixedly connected to the connecting flange, and the first magnetic connecting ring and the flexible metal wire ring form a magnetic fit.

[0008] Preferably, a second magnetic connecting ring is fixedly connected to the inner surface of the arc-shaped connecting part, the second magnetic connecting ring is made of rubber magnetic sheet material, the second magnetic connecting ring covers the connection between the adhesive arc-shaped connecting part and the annular bag body, and the second magnetic connecting ring forms a magnetic fit with the flexible metal wire ring.

[0009] A method for preparing a plastic cosmetic bag comprises the following steps: S1: hot-pressing an integrated annular elastic frame onto a film cover to form a semi-finished side end cover for standby use, preparing an annular bag body with a zipper in the middle for standby use, and preparing a hard mold ring as a mold tool for standby use, wherein the hard mold ring is a hollow elliptical column or cylindrical structure, and an inner film cavity adapted to a cosmetic bag is provided in the hard mold ring; S2: Fit the annular bag body into the inner film cavity of the corresponding size. At this time, since the size of the annular bag body is longer than the height of the hard mold ring, the upper and lower outer edges of the annular bag body protrude relative to the hard mold ring. Fold the protruding outer edge portion relative to the hard mold ring outward so that the protruding outer edge portion fits the outer annular surface of the hard mold ring; S3: placing two side end cover semi-finished products on the upper and lower ends of the hard mold ring respectively, wherein the annular elastic frame faces one side of the hard mold ring, and the annular elastic frame is adapted to fit in the inner film cavity, hot pressing the side end cover and the annular bag body by a hot press, and then using a cutting machine to directly cut off the excess part along the outer ring surface of the hard mold ring to form a plastic cosmetic bag semi-finished product; S4: unzip the semi-finished plastic cosmetic bag and turn the entire semi-finished plastic cosmetic bag from the inside out through the zipper, turning the original inner surface of the semi-finished plastic cosmetic bag into the outer surface to form a finished plastic cosmetic bag.

[0010] Beneficial effects: The annular elastic frame used in this product is made of an integrally molded annular plastic material, rather than the assembled ring structure in the prior art. It has good durability and can effectively prevent the annular elastic frame from breaking at the joints. Moreover, since the annular elastic frame is an integral structure as a whole, the cosmetic bag itself has good complete symmetry, and there is no asymmetry in the joints, which significantly improves the overall aesthetics of the cosmetic bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of Example 1.

[0012] Figure 2 It is a top view schematic diagram of Example 1.

[0013] Figure 3 for Figure 2 Schematic diagram of the cross section of AA.

[0014] Figure 4 for Figure 3 A magnified schematic diagram of point B in the middle.

[0015] Figure 5 This is a partial cross-sectional structural diagram of Example 2.

[0016] Figure 6 This is a schematic diagram of the principle of Example 3.

[0017] Figure 7 This is a schematic diagram of the state in which the outer convex ring of Example 4 is turned outward.

[0018] Figure 8 This is a partial cross-sectional view of Example 4.

[0019] Fig. 9 It is a schematic diagram of the structure of the hard mold ring.

[0020] Fig.10 The figure is a flow chart of the preparation method.

[0021] Figure numerals: 1. annular bag body; 2. side end cover; 3. storage cavity; 4. zipper; 5. membrane cover; 6. annular elastic frame; 7. outer convex ring; 8. connecting flange; 9. arc-shaped connecting part; 10. flexible metal wire ring; 11. annular rubber sleeve; 12. first magnetic connecting ring; 13. hard mold ring; 14. inner membrane cavity. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-10 The present invention is further described with Examples 1-4.

[0023] Example 1: Figure 1 As shown, a plastic cosmetic bag comprises an annular bag body and two side end covers respectively sealed and connected to both sides of the annular bag body, the annular bag body and the side end covers constitute a storage cavity for storing objects, the annular bag body is a sheet-like annular structure, a zipper extending circumferentially is provided in the middle of the annular bag body, and the zipper is used to open the storage cavity; the side end covers are composed of a film cover and an annular elastic frame fixedly connected to the outer edge of the film cover, and the annular elastic frame is made of an integrally formed annular elastic material.

[0024] like Figure 1-4 As shown, the annular elastic frame includes an outer convex ring and a connecting flange integrally connected to the lower end of the outer convex ring. The outer convex ring is in a circular or elliptical ring structure. The cross section of the outer convex ring is a circular or elliptical structure. The cross section of the connecting flange is a sheet structure. The outer edge of the film cover is integrally extended with an annular arc connecting portion. The lower end of the arc connecting portion is hot-pressed to connect the end of the annular bag body. The outer side of the arc connecting portion is hot-pressed to connect the connecting flange. The outer surface of the arc connecting portion is abutted against the inner ring surface of the outer convex ring. The connecting flange is in an annular structure as a whole. The lower end of the connecting flange is hot-pressed to cover the connection between the arc connecting portion and the annular bag body. The inner ring surface of the connecting flange is adapted to the outer surface of the arc connecting portion. The connecting flange has a corresponding convergence effect on the arc connecting portion. The outer convex ring of the annular elastic frame mainly forms a snap-fitting shape for the circular or elliptical structure of the entire cosmetic bag to prevent the cosmetic bag from deforming during use. The connecting flange is used to fix the arc connecting portion to prevent the annular elastic frame from falling off.

[0025] Embodiment 2: A plastic cosmetic bag, comprising an annular bag body and two side end covers respectively sealingly connected to both sides of the annular bag body, the annular bag body and the side end covers forming a storage cavity for storing objects, the annular bag body presents a sheet-like annular structure, a zipper extending circumferentially is provided in the middle of the annular bag body, the zipper is used to open the storage cavity; the side end covers are composed of a film cover and an annular elastic frame fixedly connected to the outer edge of the film cover, the annular elastic frame adopts an integrally formed annular elastic material.

[0026] The annular elastic frame includes an outer convex ring and a connecting flange integrally connected to the lower end of the outer convex ring. The outer convex ring is in a circular or elliptical ring structure as a whole. The cross section of the outer convex ring is a circular or elliptical structure. The cross section of the connecting flange is a sheet-like structure. The outer edge of the membrane cover is integrally extended with an annular arc-shaped connecting portion. The lower end of the arc-shaped connecting portion is hot-pressed to connect to the end of the annular bag body. The outer side of the arc-shaped connecting portion is hot-pressed to connect to the connecting flange. The outer surface of the arc-shaped connecting portion is abutted and adapted with the inner ring surface of the outer convex ring. The outer convex ring of the annular elastic frame mainly forms a snap-fitting shape for the circular or elliptical structure of the entire cosmetic bag to prevent the cosmetic bag from deforming during use. The connecting flange is used to fix the arc-shaped connecting portion to prevent the annular elastic frame from falling off.

[0027] like Figure 5 As shown, the outer convex ring is composed of a flexible metal wire ring and an annular rubber sleeve covering the outer periphery of the flexible metal wire ring, the inner side surface of the outer convex ring is partially connected with the connecting flange, the connecting flange is fixedly connected to the arc-shaped connecting part, and the outer convex ring can be turned outward relative to the arc-shaped connecting part through the connecting flange, and one outer convex ring or two adapted outer convex rings are turned outward to form a handle of a plastic cosmetic bag.

[0028] Embodiment 3: A plastic cosmetic bag, comprising an annular bag body and two side end covers respectively sealingly connected to both sides of the annular bag body, the annular bag body and the side end covers forming a storage cavity for storing objects, the annular bag body presents a sheet-like annular structure, a zipper extending circumferentially is provided in the middle of the annular bag body, the zipper is used to open the storage cavity; the side end covers are composed of a film cover and an annular elastic frame fixedly connected to the outer edge of the film cover, the annular elastic frame adopts an integrally formed annular elastic material.

[0029] The annular elastic frame includes an outer convex ring and a connecting flange integrally connected to the lower end of the outer convex ring. The outer convex ring is in a circular or elliptical ring structure as a whole. The cross section of the outer convex ring is a circular or elliptical structure. The cross section of the connecting flange is a sheet-like structure. The outer edge of the membrane cover is integrally extended with an annular arc-shaped connecting portion. The lower end of the arc-shaped connecting portion is hot-pressed to connect to the end of the annular bag body. The outer side of the arc-shaped connecting portion is hot-pressed to connect to the connecting flange. The outer surface of the arc-shaped connecting portion is abutted and adapted with the inner ring surface of the outer convex ring. The outer convex ring of the annular elastic frame mainly forms a snap-fitting shape for the circular or elliptical structure of the entire cosmetic bag to prevent the cosmetic bag from deforming during use. The connecting flange is used to fix the arc-shaped connecting portion to prevent the annular elastic frame from falling off.

[0030] like Figure 6 As shown, the outer convex ring is composed of a flexible metal wire ring and an annular rubber sleeve covering the outer periphery of the flexible metal wire ring. The inner side surface of the outer convex ring is partially connected with the connecting flange, and the connecting flange is fixedly connected to the arc-shaped connecting part. The outer convex ring can be turned outward relative to the arc-shaped connecting part through the connecting flange. One outer convex ring or two matching outer convex rings are turned outward to form a plastic cosmetic bag handle. The outer surface of the arc-shaped connecting part is fixedly connected with a first magnetic connecting ring, and the first magnetic connecting ring is made of a rubber magnetic sheet. The first magnetic connecting ring is provided with an arc-shaped notch portion that is embedded and adapted to the connecting flange. The first magnetic connecting ring is fixedly connected to the connecting flange, and the first magnetic connecting ring and the flexible metal wire ring form a magnetic attraction fit.

[0031] Example 4: Figure 7 As shown, a plastic cosmetic bag comprises an annular bag body and two side end covers respectively sealed and connected to both sides of the annular bag body, the annular bag body and the side end covers constitute a storage cavity for storing objects, the annular bag body is a sheet-like annular structure, a zipper extending circumferentially is provided in the middle of the annular bag body, and the zipper is used to open the storage cavity; the side end covers are composed of a film cover and an annular elastic frame fixedly connected to the outer edge of the film cover, and the annular elastic frame is made of an integrally formed annular elastic material.

[0032] The annular elastic frame includes an outer convex ring and a connecting flange integrally connected to the lower end of the outer convex ring. The outer convex ring is in a circular or elliptical ring structure as a whole. The cross section of the outer convex ring is a circular or elliptical structure. The cross section of the connecting flange is a sheet-like structure. The outer edge of the membrane cover is integrally extended with an annular arc-shaped connecting portion. The lower end of the arc-shaped connecting portion is hot-pressed to connect to the end of the annular bag body. The outer side of the arc-shaped connecting portion is hot-pressed to connect to the connecting flange. The outer surface of the arc-shaped connecting portion is abutted and adapted with the inner ring surface of the outer convex ring. The outer convex ring of the annular elastic frame mainly forms a snap-fitting shape for the circular or elliptical structure of the entire cosmetic bag to prevent the cosmetic bag from deforming during use. The connecting flange is used to fix the arc-shaped connecting portion to prevent the annular elastic frame from falling off.

[0033] The outer convex ring is composed of a flexible metal wire ring and an annular rubber sleeve covering the outer periphery of the flexible metal wire ring. The inner side surface of the outer convex ring is partially connected with the connecting flange, and the connecting flange is fixedly connected to the arc-shaped connecting part. The outer convex ring can be turned outward relative to the arc-shaped connecting part through the connecting flange. One outer convex ring or two matching outer convex rings are turned outward to form a plastic cosmetic bag handle. The inner surface of the arc-shaped connecting part is fixedly connected with a second magnetic connecting ring, and the second magnetic connecting ring is made of a rubber magnetic sheet. The second magnetic connecting ring covers the connection between the bonding arc-shaped connecting part and the annular bag body, and the second magnetic connecting ring and the flexible metal wire ring form a magnetic attraction fit.

[0034] like Fig.10 As shown, a method for preparing a plastic cosmetic bag comprises the following steps: S1: hot-pressing an integrated annular elastic frame onto a film cover to form a semi-finished side end cover for standby use, preparing an annular bag body with a zipper in the middle for standby use, and preparing a hard mold ring as a mold tool for standby use, wherein the hard mold ring is a hollow elliptical column or cylindrical structure, and an inner film cavity adapted to a cosmetic bag is provided in the hard mold ring; S2: Fit the annular bag body into the inner film cavity of the corresponding size. At this time, since the size of the annular bag body is longer than the height of the hard mold ring, the upper and lower outer edges of the annular bag body protrude relative to the hard mold ring. Fold the protruding outer edge portion relative to the hard mold ring outward so that the protruding outer edge portion fits the outer annular surface of the hard mold ring; S3: placing two side end cover semi-finished products on the upper and lower ends of the hard mold ring respectively, wherein the annular elastic frame faces one side of the hard mold ring, and the annular elastic frame is adapted to fit in the inner film cavity, hot pressing the side end cover and the annular bag body by a hot press, and then using a cutting machine to directly cut off the excess part along the outer ring surface of the hard mold ring to form a plastic cosmetic bag semi-finished product; S4: unzip the semi-finished plastic cosmetic bag and turn the entire semi-finished plastic cosmetic bag from the inside out through the zipper, turning the original inner surface of the semi-finished plastic cosmetic bag into the outer surface to form a finished plastic cosmetic bag.

[0035] Obviously, the above embodiments of the present invention are merely examples for illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to exhaust all implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A plastic cosmetic bag, comprising an annular bag body (1) and two side end covers (2) respectively sealedly connected to both sides of the annular bag body (1), the annular bag body (1) and the side end covers (2) forming a storage cavity (3) for storing objects, the annular bag body (1) is a sheet-like annular structure, a zipper (4) extending in the circumferential direction is provided in the middle of the annular bag body (1), the zipper (4) is used to open the storage cavity (3), and the characteristics are: The side end cover (2) is composed of a membrane cover (5) and an annular elastic frame (6) fixedly connected to the outer edge of the membrane cover (5), and the annular elastic frame (6) is made of an integrally formed annular elastic material.

2. A plastic cosmetic bag according to claim 1, characterized in that: The annular elastic frame (6) comprises an outer convex ring (7) and a connecting flange (8) integrally connected to the lower end of the outer convex ring (7); the outer convex ring (7) as a whole is in the shape of a circular ring or an elliptical ring; the cross section of the outer convex ring (7) is in the shape of a circular or elliptical structure; the cross section of the connecting flange (8) is in the shape of a sheet; the outer edge of the membrane cover (5) is integrally extended with an annular arc connecting portion (9); the lower end of the arc connecting portion (9) is hot-pressed connected to the end of the annular bag body (1); the outer side of the arc connecting portion (9) is hot-pressed connected to the connecting flange (8); the outer surface of the arc connecting portion (9) is abutted and adapted with the inner ring surface of the outer convex ring (7).

3. A plastic cosmetic bag according to claim 1, characterized in that: The connecting flange (8) is annular in structure as a whole. The inner annular surface or the lower end of the connecting flange (8) is hot-pressed to cover the connection between the arc-shaped connecting portion (9) and the annular bag body (1). The inner annular surface of the connecting flange (8) is adapted to the outer surface of the arc-shaped connecting portion (9). The connecting flange (8) has a corresponding tightening effect on the arc-shaped connecting portion (9).

4. A plastic cosmetic bag according to claim 2, characterized in that: The outer convex ring (7) is composed of a flexible metal wire ring (10) and an annular rubber sleeve (11) covering the outer periphery of the flexible metal wire ring (10); the inner side surface of the outer convex ring (7) is partially connected to the connecting flange (8); the connecting flange (8) is fixedly connected to the arc-shaped connecting portion (9); the outer convex ring (7) can be turned outward relative to the arc-shaped connecting portion (9) through the connecting flange (8); one outer convex ring (7) or two matching outer convex rings (7) are turned outward to form a handle for a plastic cosmetic bag.

5. A plastic cosmetic bag according to claim 4, characterized in that: A first magnetic connection ring (12) is fixedly connected to the outer surface of the arc-shaped connection portion (9); the first magnetic connection ring (12) is made of a rubber magnetic sheet material; the first magnetic connection ring (12) is provided with an arc-shaped notch portion that is embedded and adapted to fit the connection flange (8); the first magnetic connection ring (12) is fixedly connected to the connection flange (8); and the first magnetic connection ring (12) and the flexible metal wire ring (10) form a magnetic attraction fit.

6. A plastic cosmetic bag according to claim 4, characterized in that: A second magnetic connection ring is fixedly connected to the inner surface of the arc-shaped connection part (9), the second magnetic connection ring is made of a rubber magnetic sheet material, the second magnetic connection ring covers the connection between the adhesive arc-shaped connection part (9) and the annular bag body (1), and the second magnetic connection ring and the flexible metal wire ring (10) form a magnetic attraction fit.

7. A method for preparing a plastic cosmetic bag according to any one of claims 1 to 6, comprising the following steps: S1: hot pressing an integrated annular elastic frame (6) onto a film cover (5) to form a semi-finished side end cover (2) for standby use, preparing an annular bag body (1) with a zipper (4) in the middle for standby use, and preparing a hard mold ring (13) as a mold tool for standby use, wherein the hard mold ring (13) is a hollow elliptical column or cylindrical structure, and an inner mold cavity (14) adapted to a cosmetic bag is provided in the hard mold ring (13); S2: The annular bag body (1) is fitted into an inner film cavity (14) of corresponding size. At this time, since the size of the annular bag body (1) is longer than the height of the hard mold ring (13), the upper and lower outer edges of the annular bag body (1) protrude relative to the hard mold ring (13). The protruding outer edge portion is folded outward relative to the hard mold ring (13) so that the protruding outer edge portion is fitted to the outer annular surface of the hard mold ring (13); S3: placing the two semi-finished side end covers (2) on the upper and lower ends of the hard mold ring (13), respectively, wherein the annular elastic frame (6) faces one side of the hard mold ring (13), and the annular elastic frame (6) is positioned to fit into the inner film cavity (14), and the side end covers (2) and the annular bag body (1) are hot-pressed by a hot press, and then the excess part is directly cut off along the outer ring surface of the hard mold ring (13) by a cutting machine to form a semi-finished plastic cosmetic bag; S4: Open the zipper (4) to turn the entire semi-finished plastic cosmetic bag from the inside out through the zipper (4), and turn the original inner surface of the semi-finished plastic cosmetic bag outside to become the outer surface to form a finished plastic cosmetic bag.

Images