Release film locally coated with silicon

Abstract

The utility model provides a release film locally coated with silicon. The release film comprises a film body, a printing mark and a silicone oil coating, wherein the printing mark and the silicone oil coating are arranged on the film body; the coating film body adopts an anti-deformation composite film structure; the coating body is made of PP / PET / PA / HDPE / non-woven fabric; the surface layer of the coating body is subjected to heat sealing to form a heat sealing layer, and at least one surface of the coating body is provided with the heat sealing layer; according to the utility model, the silicone oil coating is formed by adopting a local silicon coating mode, so that the problem that a coating film is easy to unseal due to full-width silicon coating is solved.

Description

Technical Field

[0001] The utility model relates to an outer package of a sanitary napkin, in particular to a release film partially coated with silicon. Background Art

[0002] The film of sanitary napkins is to protect the cleanliness of the product and prevent it from being contaminated, and it can also provide users with a better feel and sensation. In the production and packaging of sanitary napkins (or panty liners), sticky glue (usually hot melt glue) is applied to the back of the sanitary napkin to fix the sanitary napkin on the underwear and prevent it from shifting. The hot melt glue needs to be covered with release material to prevent the hot melt glue from sticking to the small film and not being able to open it. Traditionally, release materials generally use release paper. In recent years, the small film is coated with release silicone on the inner side, which can save a layer of paper. Since it is fully coated with silicone, it is easy to cause problems when sealing the package.

[0003] In order to solve the problem of sealing difficulty, silicone is only applied at the contact point with the sanitary napkin adhesive. On the one hand, it is beneficial to packaging and can save up to 1 / 3 of expensive silicone oil. However, the packaging equipment needs to have positioning electric eye control, and the packaging film needs to have a printed alignment mark (such as a color mark) relative to the local silicone coating position. On the other hand, it is extremely difficult to produce packaging film with local silicone coating. It is easy to produce a large offset between the color mark and the silicone coating position, so that the packaging printing is aligned but the silicone coating offset causes the adhesive part to be unable to be peeled off from the small bag, which is a serious quality problem. It is also easy to have a roll of release small package film when producing sanitary napkins. The fixed length of the roll outside and inside the roll varies seriously, making it impossible to align the film when cutting the package and use it. The main reason for this problem is that the general sanitary napkin small package film is PE matte embossed film, about 22 grams / square meter, which is sensitive to heat and tension and easy to deform. The center distance positioning of the printed pattern outside the film itself has fluctuated greatly, and it is even more difficult to register the local silicone coating at the back and the front and back printing. In addition, due to the taper of the original film inside and outside the roll and the finished roll, the deformation degree is different. Utility Model Content

[0004] The main technical problem to be solved by the utility model is that the film is sensitive to heat and tension, and is easy to deform, which easily leads to the problem of positional displacement between the local silicon coating and the external printed pattern, so a release film with a local silicon coating is provided.

[0005] In order to solve the above technical problems, the utility model provides a partially silicon-coated release film, comprising a film body and a printed mark and a silicone oil coating arranged on the film body;

[0006] The envelope body adopts an anti-deformation composite film structure; the material of the envelope body adopts PP / PET / PA / HDPE / non-woven fabric; the surface layer of the envelope body is heat-sealed to form a heat-sealing layer, and the heat-sealing layer is arranged on at least one side of the envelope body.

[0007] In a preferred embodiment, the silicone oil coating is formed on the inner surface of the envelope body by partially coating with silicon; the inner surface is the side that is adhered to the adhesive surface on the back of the sanitary napkin;

[0008] The printed mark corresponds to the position of the silicone oil coating.

[0009] In a preferred embodiment, the thickness of the silicone oil coating is set at 0.2-2gsm.

[0010] In a preferred embodiment, the inner surface of the envelope body is coated with silicon at longitudinal intervals to form the silicone oil coating; the silicone oil coating is a strip-shaped coating.

[0011] In a preferred embodiment, the silicone oil coating is formed by coating the inner surface of the envelope body with silicon at lateral intervals; the silicone oil coating is a strip-shaped coating.

[0012] In a preferred embodiment, the inner surface of the envelope body is coated with silicon in an intermittent dot coating manner to form the silicone oil coating; the silicone oil coating is a square coating.

[0013] In a preferred embodiment, the envelope body comprises an inner membrane and an outer membrane;

[0014] The material of one of the outer film and the inner film is PP / PET / PA / HDPE, and the material of the other film is PE / non-woven fabric;

[0015] The thickness of one of the film layers is 4-16 gsm; the thickness of the other film layer is 8-16 gsm.

[0016] In a preferred embodiment, the envelope body comprises an inner membrane, a composite glue layer and an outer membrane;

[0017] The thickness of the composite glue layer is 0.5-4gsm.

[0018] In a preferred embodiment, the inner layer film material is PP / PET / PA / HDPE / non-woven fabric; the outer layer film material is PE / non-woven fabric;

[0019] The material thickness of the PP / PET / PA / HDPE is 4-16gsm; the material thickness of the non-woven fabric is 8-30gsm; and the material thickness of the PE is 4-16gsm.

[0020] In a preferred embodiment, the printed mark can be printed on the outer packaging surface of the envelope body or in the interlayer of the envelope body;

[0021] Or the printed mark is printed between the envelope body and the silicone oil coating.

[0022] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0023] The coating body is designed to adopt an anti-deformation composite film structure, mainly using materials with high temperature resistance and strength, such as PP / PET / PA / HDPE, non-woven fabrics, etc. It has at least single-sided heat sealing and good outer appearance (matte surface). In order to achieve a soft effect after compounding, their weight is low (preferably 4uPET, 12uPPP and 11g non-woven fabrics), producing a heat-resistant and high-strength film, which is not easy to deform during printing, coating, slitting, storage, etc., but still has the requirements of heat sealing, soft and elegant hand feeling and beautiful printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a side view of a conventional silicon-coated release film in the prior art;

[0025] Figure 2 It is a top view of a conventional silicon-coated release film in the prior art;

[0026] Figure 3 This is a distribution diagram of the cutting lines of the small film packages of the finished rolls of the conventional silicon-coated release film in the prior art;

[0027] Figure 4 It is a side view of the release film partially coated with silicon in the first embodiment of this embodiment;

[0028] Figure 5 It is a top view of the release film partially coated with silicon in the first embodiment of this embodiment;

[0029] Figure 6 This is a distribution diagram of the cutting lines of the small film of the release film finished roll partially coated with silicon in the first embodiment of this embodiment;

[0030] Figure 7 It is a side view of the release film partially coated with silicon in the second embodiment of this embodiment;

[0031] Figure 8 It is a top view of the release film partially coated with silicon in the second embodiment of this embodiment;

[0032] Fig. 9 This is a distribution diagram of the cutting lines of the small film of the release film finished roll partially coated with silicon in the second embodiment of this embodiment;

[0033] Fig.10 It is a side view of a release film partially coated with silicon in the third embodiment of the present embodiment;

[0034] Fig.11 It is a top view of a release film partially coated with silicon in the third embodiment of the present embodiment;

[0035] Fig.12This is a distribution diagram of the cutting lines of the small film of the release film finished roll partially coated with silicon in the third embodiment of this embodiment;

[0036] Fig.13 This is a structure of an anti-deformation composite membrane according to the fourth embodiment of this embodiment;

[0037] Fig.14 This is a structure of an anti-deformation composite membrane according to the fifth embodiment of this embodiment;

[0038] Fig.15 This is a structure of an anti-deformation composite membrane according to the sixth embodiment of this embodiment;

[0039] Fig.16 This is a structure of an anti-deformation composite membrane according to the seventh embodiment of this embodiment;

[0040] Fig.17 This is a structure of an anti-deformation composite membrane according to the eighth embodiment of this embodiment;

[0041] Fig.18 This is a structure of an anti-deformation composite membrane according to the ninth embodiment of this embodiment;

[0042] Fig.19 This is a structure of an anti-deformation composite membrane according to the tenth embodiment of this embodiment;

[0043] Fig. 20 This is a structure of an anti-deformation composite membrane in the eleventh embodiment of the present embodiment;

[0044] Fig.21 This is a structure of an anti-deformation composite membrane according to the twelfth embodiment of the present embodiment;

[0045] Fig. 22 This is the structure of an anti-deformation composite membrane of the thirteenth embodiment of the present embodiment.

[0046] Explanation of the accompanying drawings: 1. Outer film; 2. Inner film; 3. Silicone oil coating; 4. Printing mark; 5. Cutting knife position; 6. Film package body; 7. Composite glue layer. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0048] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "installed / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0050] like Figure 1-3 Generally, conventional silicon-coated release films are a layer of film substrate 101, and then a pattern 102 is hard-brushed on the outer side of the film substrate 101, and a silicone oil layer 103 is coated on the entire inner side of the film substrate 101. Although the entire surface of the silicone oil layer 103 does not need to consider the area of ​​the silicone oil layer when cutting the finished roll into small packages, and can be cut directly according to the slitting line 104, it is easy to cause the problem of loose sealing when packaging due to the full width of the silicone coating.

[0051] If the local silicone coating method is adopted, the sealing part is not coated with silicone, but only the contact part with the sanitary napkin adhesive is coated with silicone. On the one hand, it is beneficial to the sealing, and it can also save up to 1 / 3 of the expensive silicone oil.

[0052] However, when the finished roll of small packaging film is cut and divided, the packaging equipment needs to have positioning electric eye control, and the packaging film needs to have a printed alignment mark (such as a color mark) relative to the local silicon coating position. On the other hand, it is extremely difficult to produce partially silicon-coated packaging film. It is easy to produce a large offset between the color mark and the silicon coating position, so that the packaging printing is aligned but the silicon coating offset causes the adhesive part to be unable to be peeled off from the small bag, which is a serious quality problem. It is also easy for a roll of release small packaging film to have serious changes in the fixed length outside and inside the roll when producing sanitary napkins, making it impossible to align when sealing and cutting the film, and it cannot be used. The main reason for this problem is that the general sanitary napkin small packaging film is PE matte embossed film, about 22 grams / square meter, which is sensitive to heat and tension and easy to deform. The center distance positioning of the printed pattern outside the film itself has fluctuated greatly, and it is even more difficult to register the local silicon coating at the back and the front and back printing. In addition, due to the different degrees of deformation of the original film inside and outside the roll and the finished film taper, it is difficult to ensure that the entire roll of small-packaged finished film can achieve a fixed length and stability from beginning to end during production in the bathroom, and that the printing on the outside of the film is aligned with the local silicon-coated area inside the film.

[0053] Therefore, in this embodiment, a partially silicon-coated release film is provided, the main purpose of which is to solve the problem that the film is sensitive to heat and tension, is easy to deform, and easily causes the position of the partially silicon-coated and external printed patterns to shift.

[0054] refer to Figure 4-Figure 22 The present embodiment provides a partially silicone-coated release film, comprising a film body 6 and a printed mark 4 and a silicone oil coating 3 arranged on the film body 6; the silicone oil coating 3 is formed on the inner surface of the film body 6 by partially coating with silicon; the inner surface is the side that is adhered to the adhesive surface on the back of the sanitary napkin; the printed mark 4 corresponds to the position of the silicone oil coating 3; the film body 6 adopts an anti-deformation composite film structure; the thickness of the silicone oil coating 3 is set at 0.2-2gsm.

[0055] In the design corresponding to the position of the printed mark 4 and the silicone oil coating 3, in this embodiment, the package body 6 is designed to adopt an anti-deformation composite film structure, mainly using materials with high temperature resistance and strength, such as BOPP, BOPET, BOPA, HDPE, non-woven fabrics, etc. It has at least single-sided heat sealing and good appearance (matte surface). In order to achieve a soft effect after compounding, their grams are low (preferably 4uBOPET, 12uPBOPP and 11g non-woven fabrics), producing a heat-resistant and high-strength film, so that it is not easy to deform during printing, coating, slitting, storage, etc., but still has the requirements of sealing, soft and elegant feel and beautiful printing.

[0056] The first embodiment, as Figure 4-6 .

[0057] The inner surface of the envelope body 6 is coated with silicon at longitudinal intervals to form the silicone oil coating 3; the silicone oil coating 3 is a longitudinal strip coating. The printed mark 4 is set to a longitudinally spaced strip structure corresponding to the silicone oil coating 3. The printed mark 4 is used to mark the positioning of the slitting knife position 5, and the strip rolls are cut. Then, when the sanitary napkin is packaged with glue on the back, the left and right side edges are used for positioning, so that the silicone oil coating 3 is positioned and glued on the back to be fixed.

[0058] The left and right sides of the film substrate of the single-piece packaging body 6 are not coated with silicone, and the left and right sealing parts are not coated with silicone. Silicone is only coated at the contact part with the sanitary napkin adhesive and the middle part, which is beneficial to enhance the sealing strength of the left and right sides.

[0059] The second embodiment, as Figure 7-9 .

[0060] The inner surface of the envelope body 6 is coated with silicon at a transverse interval to form the silicone oil coating 3; the silicone oil coating 3 is a transverse strip coating. The printed mark 4 is set to a transversely spaced strip structure corresponding to the silicone oil coating 3. The printed mark 4 is used to mark the positioning of the slitting knife position 5, and the strip roll is cut into strips. Then, when the sanitary napkin is packaged with glue on the back, the printed mark 4 is used for positioning, so that the silicone oil coating 3 is positioned and glued to the back glue position.

[0061] The film substrate of the single-piece packaging body 6 is not coated with silicon on the top and bottom, and the upper and lower seals are not coated with silicon. Silicon is only coated on the contact with the sanitary napkin adhesive and the left and right side edges, which is beneficial to enhance the upper and lower sealing strength.

[0062] The third embodiment, as Figure 10-12 .

[0063] The inner surface of the envelope body 6 is coated with silicon in a spaced partial square manner to form the silicone oil coating 3; the silicone oil coating 3 is a square coating. The printed mark 4 and the silicone oil coating 3 are arranged in a spaced square structure. The printed mark 4 is used to mark the positioning of the slitting knife position 5, and the strip-shaped roll material is cut. Then, when the sanitary napkin is packaged with glue on the back, the printed mark 4 and the edge are used for positioning, so that the square silicone oil coating 3 is positioned and glued to the back glue position.

[0064] The film substrate of the single-piece packaging body 6 is not coated with silicone on the four sides, including the four sealing parts. Silicon is only applied at the contact part with the sanitary napkin adhesive, which is beneficial to enhance the sealing strength of the four sides, especially for sanitary napkins with odor.

[0065] The fourth embodiment, as Fig.13 .

[0066] Based on the first, second and third embodiments, an anti-deformation composite membrane structure is provided.

[0067] The film body 6 is divided into an inner film 2 and an outer film 1 according to the layer arrangement; the inner surface of the inner film 2 is partially coated with silicon, and the thickness of the formed silicone oil coating 3 is 0.2-2gsm. A heat-sealable material is selected to form the heat-sealable surface layer.

[0068] The outer surface of the outer film 1 is printed with a mark 4, the outer film 1 is made of a white laminated PE film with a thickness of 8-20 gsm, the inner film 2 is made of an anti-deformation BOPP / PET / PA film with a thickness of 4-20 gsm, and the inner film 2 is a transparent film.

[0069] The fifth embodiment, as Fig.14 .

[0070] On the basis of the fourth embodiment, a composite glue layer 7 is provided between the inner film 2 and the outer film 1, the inner film 2 and the outer film 1 are composited with glue, and the thickness of the composite glue layer 7 is 1-4 gsm. The outer film 1 is made of PE film and is provided with white embossing.

[0071] The sixth embodiment, as Fig.15 .

[0072] Based on the first, second and third embodiments, an anti-deformation composite membrane structure is provided.

[0073] The film body 6 is divided into an inner film 2 and an outer film 1 according to the layer arrangement, and a composite glue layer 7 is arranged between the inner film 2 and the outer film 1. The inner film 2 and the outer film 1 are composited with glue, and the thickness of the composite glue layer 7 is 1-4gsm.

[0074] The inner surface of the inner film 2 is partially coated with silicon, and the thickness of the formed silicone oil coating 3 is 0.3-2gsm. The outer surface of the outer film 1 is printed with a mark 4, and a heat-sealable material is selected to form a heat-sealable surface layer.

[0075] The outer film 1 is made of an anti-deformation BOPP / PET / PA film, the thickness of which is set at 4-20 gsm, and the outer film 1 is a transparent film. The inner film 2 is made of a white PE film, the thickness of which is set at 8-20 gsm.

[0076] The seventh embodiment, as Fig.16 .

[0077] On the basis of the sixth embodiment, the envelope body 6 is divided into an inner film 2 and an outer film 1 according to the layer arrangement, and no composite glue layer 7 is arranged between the inner film 2 and the outer film 1 .

[0078] The eighth embodiment, as Fig.17 .

[0079] On the basis of the sixth embodiment, a mark 4 is printed between the outer film 1 and the inner film 2, and the printed mark 4 is arranged on the upper layer of the composite glue layer 7. The printed mark 4 is printed on the inner side of the transparent film.

[0080] The ninth embodiment, as Fig.18 .

[0081] On the basis of the seventh embodiment, a mark 4 is printed between the outer film 1 and the inner film 2. The printed mark 4 is printed on the back of the transparent film.

[0082] The tenth embodiment, as Fig.19 .

[0083] Based on the first, second and third embodiments, an anti-deformation composite membrane structure is provided.

[0084] The film body 6 is divided into an inner film 2 and an outer film 1 according to the layer arrangement, and a composite glue layer 7 is arranged between the inner film 2 and the outer film 1. The inner film 2 and the outer film 1 are composited with glue, and the thickness of the composite glue layer 7 is 0.5-4gsm.

[0085] The inner surface of the inner film 2 is partially coated with silicon, and the thickness of the formed silicone oil coating 3 is 0.3-2gsm. The outer surface of the outer film 1 is printed with a mark 4, and a heat-sealable material is selected to form a heat-sealable surface layer.

[0086] The outer film 1 is made of non-woven fabric with a thickness of 8-30 gsm. The inner film 2 is made of PE film with a thickness of 8-16 gsm, and the inner film 2 is a white film or a transparent film.

[0087] The eleventh embodiment, as Fig. 20 .

[0088] On the basis of the tenth embodiment, a mark 4 is printed between the outer film 1 and the inner film 2, and the printed mark 4 is arranged on the lower layer of the composite glue layer 7. The printed mark 4 is printed on the inner side of the transparent film.

[0089] The twelfth embodiment, as Fig.21 .

[0090] On the basis of the tenth embodiment, a mark 4 is printed between the silicone oil coating 3 and the inner film 2, and the printed mark 4 is arranged on the upper layer of the silicone oil coating 3. The printed mark 4 is printed on the transparent film.

[0091] The thirteenth embodiment, as Fig. 22 .

[0092] On the basis of the twelfth embodiment, the envelope body 6 is divided into an inner layer film 2 and an outer layer film 1 according to the layer arrangement, and no composite glue layer 7 is arranged between the inner layer film 2 and the outer layer film 1 .

[0093] The above is only a preferred specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the utility model within the technical scope disclosed by the utility model shall be deemed to infringe the protection scope of the utility model.

Claims

1. A partially siliconized release film, characterized in that: It includes a membrane body and a printed mark and a silicone oil coating arranged on the membrane body; The envelope body adopts an anti-deformation composite film structure; the material of the envelope body adopts PP / PET / PA / HDPE / non-woven fabric; the surface layer of the envelope body is heat-sealed to form a heat-sealing layer, and the heat-sealing layer is arranged on at least one side of the envelope body.

2. A partially siliconized release film according to claim 1, characterized in that: The silicone oil coating is formed on the inner surface of the envelope body by locally coating with silicon; the inner surface is the side that is adhered to the adhesive surface on the back of the sanitary napkin; The printed mark corresponds to the position of the silicone oil coating.

3. A partially siliconized release film according to claim 2, characterized in that: The thickness of the silicone oil coating is set at 0.2-2gsm.

4. The partially siliconized release film according to claim 3, characterized in that: The inner surface of the envelope body is coated with silicon at longitudinal intervals to form the silicone oil coating; the silicone oil coating is a strip-shaped coating.

5. The partially siliconized release film according to claim 3, characterized in that: The inner surface of the envelope body is coated with silicon at lateral intervals to form the silicone oil coating; the silicone oil coating is a strip-shaped coating.

6. The partially siliconized release film according to claim 3, characterized in that: Applying silicon on the inner surface of the envelope body in an intermittent spot coating manner to form the silicone oil coating; The silicone oil coating is a square coating.

7. The partially siliconized release film according to claim 1, characterized in that: The envelope body comprises an inner membrane and an outer membrane; The material of one of the outer film and the inner film is PP / PET / PA / HDPE, and the material of the other film is PE / non-woven fabric; The thickness of one of the film layers is 4-16 gsm; the thickness of the other film layer is 8-16 gsm.

8. The partially siliconized release film according to claim 1, characterized in that: The envelope body comprises an inner membrane, a composite glue layer and an outer membrane; The thickness of the composite glue layer is 0.5-4gsm.

9. The partially siliconized release film according to claim 8, characterized in that: The inner layer membrane material is PP / PET / PA / HDPE / non-woven fabric; the outer layer membrane material is PE / non-woven fabric; The material thickness of the PP / PET / PA / HDPE is 4-16gsm; the material thickness of the non-woven fabric is 8-30gsm; and the material thickness of the PE is 4-16gsm.

10. A partially siliconized release film according to any one of claims 1 to 9, characterized in that: The printed mark can be printed on the outer packaging surface of the envelope body or in the interlayer of the envelope body; Or the printed mark is printed between the envelope body and the silicone oil coating.

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