Plastic cosmetic bag

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 present invention relates to the field of cosmetic bags, in particular to a plastic cosmetic bag. Background Art

[0002] Existing plastic cosmetic bags include an annular bag body and two side end covers that are respectively sealed and connected to the two sides of the annular bag body. 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 strips of plastic are attached to each other from end to end 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 will inevitably be corresponding cutting edges at the joints of the head and tail. During actual use, the strips of plastic will often detach from here, thereby shortening the life of the product. Secondly, firstly, the presence 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, during the actual assembly process, the two splicing interfaces will often not be 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 ring frame, they need to surround the strip plastic of each ring frame and 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:

[0004] A plastic cosmetic bag comprises an annular bag body and two side end covers respectively sealedly 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 is 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, and the annular elastic frame is made of an integrally formed annular elastic material.

[0005] 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 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 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.

[0006] Preferably, the connecting flange is annular in structure as a whole, and the inner annular surface or lower end of the connecting flange is hot-pressed to cover the connection between the arcuate connecting portion and the annular bag body. The inner annular surface of the connecting flange is adapted to the outer surface of the arcuate connecting portion, and the connecting flange has a corresponding tightening effect on the arcuate connecting portion. By hot-pressing the inner annular surface of the connecting flange and the outer edge of the film cover, the connection stability between the annular elastic frame and the arcuate connecting portion is significantly improved, and covering the connection between the arcuate connecting portion and the annular bag body further improves the connection stability between the arcuate connecting portion and the annular bag body. In addition, the connecting flange has a corresponding tightening effect on the arcuate connecting portion, avoiding local deformation of the arcuate connecting portion.

[0007] 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. 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 adapted outer convex rings are turned outward to form a handle of a plastic cosmetic bag.

[0008] 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 groove portion that is embedded in the connecting flange, the first magnetic connecting ring is fixedly connected to the connecting flange, and the first magnetic connecting ring forms a magnetic fit with the flexible metal wire ring.

[0009] Preferably, the inner surface of the arc-shaped connecting part is fixedly connected with a second magnetic connecting ring, 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 and the flexible metal wire ring form a magnetic fit.

[0010] A method for preparing a plastic cosmetic bag comprises the following steps:

[0011] 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. The hard mold ring is a hollow elliptical or cylindrical structure, and an inner mold cavity adapted for the cosmetic bag is provided in the hard mold ring;

[0012] S2: Fit the annular bag into the inner film cavity of the corresponding size. At this time, since the size of the annular bag is longer than the height of the rigid mold ring, the upper and lower outer edges of the annular bag protrude relative to the rigid mold ring. Fold the protruding outer edges outward relative to the rigid mold ring so that the protruding outer edges fit the outer annular surface of the rigid mold ring.

[0013] S3: placing the two side end cap 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. The side end caps and the annular bag body are hot-pressed by a hot press, and then the excess part is directly cut along the outer ring surface of the hard mold ring by a cutting machine to form the plastic cosmetic bag semi-finished product;

[0014] 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.

[0015] 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 existing technology. It has good durability and effectively prevents the annular elastic frame from breaking at the splicing point. Moreover, since the annular elastic frame is an integrated structure as a whole, the cosmetic bag itself has good complete symmetry and there is no asymmetry in the splicing interface, which significantly improves the overall aesthetics of the cosmetic bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of Example 1.

[0017] Figure 2 This is a schematic top view of Example 1.

[0018] Figure 3 for Figure 2 Schematic cross-section of AA.

[0019] Figure 4 for Figure 3 Enlarged schematic diagram of point B in the middle.

[0020] Figure 5 This is a partial cross-sectional structural diagram of Example 2.

[0021] Figure 6 This is a schematic diagram of the principle of Example 3.

[0022] Figure 7 This is a schematic diagram of the state in which the outer convex ring of Example 4 is turned outward.

[0023] Figure 8 This is a partial cross-sectional view of Example 4.

[0024] Figure 9 It is a structural diagram of the hard mold ring.

[0025] Figure 10 The figure is a flow chart of the preparation method.

[0026] 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

[0027] The following is combined with Figure 1-10 The present invention is further illustrated with Examples 1-4.

[0028] 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 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 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.

[0029] 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 has an overall circular or elliptical ring structure, and 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 film cover is integrally extended with an annular arc-shaped connecting portion. The lower end of the arc-shaped connecting portion is hot-pressed to the end of the annular bag body. The outer side of the arc-shaped connecting portion is hot-pressed to the connecting flange. The outer surface of the arc-shaped connecting portion forms an abutment with the inner surface of the outer convex ring. The connecting flange is an overall annular structure. The lower end of the connecting flange is hot-pressed to cover the connection between the arc-shaped connecting portion and the annular bag body. The inner surface of the connecting flange fits the outer surface of the arc-shaped connecting portion, and the connecting flange has a corresponding tightening effect on the arc-shaped connecting portion. The outer convex ring of the annular elastic frame mainly serves to form a fixed locking shape for the circular or elliptical structure of the entire cosmetic bag, preventing the cosmetic bag from deforming during use. The connecting flange serves to secure the arc-shaped connecting portion and prevent the annular elastic frame from falling off.

[0030] Example 2: A plastic cosmetic bag, comprising 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 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.

[0031] 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 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 the end of the annular bag body. The outer side of the arc-shaped connecting portion is hot-pressed to the connecting flange. The outer surface of the arc-shaped connecting portion is abutted and adapted with the inner 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.

[0032] 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. 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 adapted outer convex rings are turned outward to form a handle of a plastic cosmetic bag.

[0033] Example 3: A plastic cosmetic bag, comprising 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 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 molded annular elastic material.

[0034] 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 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 the end of the annular bag body. The outer side of the arc-shaped connecting portion is hot-pressed to the connecting flange. The outer surface of the arc-shaped connecting portion is abutted and adapted with the inner 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.

[0035] 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 to the connecting flange, and the connecting flange is fixedly connected to the arcuate connecting portion. The outer convex ring can be turned outward relative to the arcuate connecting portion 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 arcuate connecting portion is fixedly connected to a first magnetic connecting ring. The first magnetic connecting ring is made of a rubber magnetic sheet and has an arcuate notch portion that fits the connecting flange. The first magnetic connecting ring is fixedly connected to the connecting flange and forms a magnetic fit with the flexible metal wire ring.

[0036] 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 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 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.

[0037] 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 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 the end of the annular bag body. The outer side of the arc-shaped connecting portion is hot-pressed to the connecting flange. The outer surface of the arc-shaped connecting portion is abutted and adapted with the inner 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.

[0038] 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 to the connecting flange, which is fixedly connected to the arcuate connecting portion. The outer convex ring can be turned outward relative to the arcuate connecting portion through the connecting flange. One or two matching outer convex rings are turned outward to form the handle of the plastic cosmetic bag. The inner surface of the arcuate connecting portion is fixedly connected to a second magnetic connecting ring made of a rubber magnetic sheet. The second magnetic connecting ring covers the connection between the adhesive arcuate connecting portion and the annular bag body, and the second magnetic connecting ring and the flexible metal wire ring form a magnetic attraction.

[0039] like Figure 10 As shown, a method for preparing a plastic cosmetic bag comprises the following steps:

[0040] 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. The hard mold ring is a hollow elliptical or cylindrical structure, and an inner mold cavity adapted for the cosmetic bag is provided in the hard mold ring;

[0041] S2: Fit the annular bag into the inner film cavity of the corresponding size. At this time, since the size of the annular bag is longer than the height of the rigid mold ring, the upper and lower outer edges of the annular bag protrude relative to the rigid mold ring. Fold the protruding outer edges outward relative to the rigid mold ring so that the protruding outer edges fit the outer annular surface of the rigid mold ring.

[0042] S3: placing the two side end cap 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. The side end caps and the annular bag body are hot-pressed by a hot press, and then the excess part is directly cut along the outer ring surface of the hard mold ring by a cutting machine to form the plastic cosmetic bag semi-finished product;

[0043] 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.

[0044] Obviously, the above embodiments of the present invention are merely examples for the purpose of illustrating the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to provide an exhaustive list of implementations. However, obvious variations or modifications arising from the essence of the present invention remain within the scope of protection 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), wherein the annular bag body (1) and the side end covers (2) constitute a storage cavity (3) for storing objects, wherein the annular bag body (1) is a sheet-like annular structure, and a zipper (4) extending in the circumferential direction is provided in the middle of the annular bag body (1), and the zipper (4) is used to open the storage cavity (3), and is characterized in that: 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) includes 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) 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 circle or an 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 to connect to the end of the annular bag body (1); the outer side of the arc connecting portion (9) is hot-pressed to connect to the connecting flange (8); the outer surface of the arc connecting portion (9) is in abutment with the inner ring surface of the outer convex ring (7).

3. A plastic cosmetic bag according to claim 2, 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 convergence 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 with 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 adapted outer convex rings (7) are turned outward to form a handle of a plastic cosmetic bag.

5. A plastic cosmetic bag according to claim 4, characterized in that: The outer surface of the arc-shaped connecting portion (9) is fixedly connected with a first magnetic connecting ring (12), the first magnetic connecting ring (12) is made of a rubber magnetic sheet, the first magnetic connecting ring (12) is provided with an arc-shaped notch portion that is embedded and adapted to the connecting flange (8), the first magnetic connecting ring (12) is fixedly connected to the connecting flange (8), and the first magnetic connecting 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 portion (9), the second magnetic connection ring is made of a rubber magnetic sheet, the second magnetic connection ring covers the connection between the adhesive arc-shaped connection portion (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.

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