Double-sided adhesive tape and production process

Abstract

The double-faced adhesive tape comprises an outer film and an adhesive layer on the outer film, characterized in that a reinforcing rib is arranged between the adhesive layer and the outer film, the reinforcing rib is arranged from the outer side of the outer film to the inner side, and a base layer is arranged on the inner side of the reinforcing rib.

Description

Technical Field

[0001] This invention relates to the field of double-sided adhesives, and more specifically to a double-sided adhesive and its manufacturing process. Background Technology

[0002] We often use tape in our daily lives and work. Tape has a variety of uses, such as sealing cardboard boxes and bonding paper. However, we often encounter situations where we need transparent tape, double-sided tape, or black tape at the same time. After wrapping the tape around the object, we need to cut the tape, which usually requires tools such as a knife or scissors.

[0003] Currently available double-sided tape consists of only an adhesive layer and a release paper on the surface. To achieve better adhesion, double-sided tape is generally difficult to peel off after use. When used on packaging boxes, it often requires tools or damage to the box to open it. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a double-sided adhesive tape with internal reinforcing ribs. The double-sided adhesive tape can be effectively and quickly peeled off by tearing the reinforcing ribs.

[0005] A double-sided adhesive tape includes an outer film and an adhesive layer on the outer film, characterized in that a reinforcing rib is provided between the adhesive layer and the outer film.

[0006] Preferably, the reinforcing ribs are arranged from the outside to the inside along the outer edge of the outer membrane, and a substrate is provided on the inner side of the reinforcing ribs.

[0007] Preferably, the upper part of the substrate is provided with an inner adhesive layer, and the total thickness of the inner adhesive layer and the substrate is equal to the thickness of the reinforcing rib.

[0008] Preferably, the reinforcing rib, substrate, and inner adhesive layer are located between the outer film and the adhesive layer, and the reinforcing rib, substrate, and inner adhesive layer form an interlayer between the outer film and the adhesive layer.

[0009] Preferably, the size of the reinforcing rib is 10% to 30% of the sandwich layer size.

[0010] Preferably, the size of the reinforcing rib is 25% of the sandwich layer size.

[0011] Preferably, the outer membrane has a toothed opening on one side to facilitate peeling off the outer membrane.

[0012] A manufacturing process for double-sided tape, characterized by comprising the following steps:

[0013] S1. Lamination: Take two portions of the outer film and apply an adhesive layer onto the outer film.

[0014] S2, Composite: The substrate is bonded to the adhesive layer, and then a reinforcing rib is bonded to one side of the substrate. The height of the reinforcing rib should be higher than that of the substrate.

[0015] S3. Apply adhesive: Apply an inner adhesive layer to the substrate so that the sum of the height of the substrate and the inner adhesive layer after applying the adhesive layer is equal to the height of the reinforcing rib. The substrate, inner adhesive layer and reinforcing rib after applying adhesive form a sandwich layer. The surface of the sandwich layer should be flat.

[0016] S4. Lamination: After the adhesive is applied, another outer film is laminated onto the interlayer surface. Once the outer film is laminated, it can be rolled up and stored.

[0017] Preferably, the composite process includes cutting a reinforcing rib that is 30% the width of the outer film, then attaching the reinforcing rib to the adhesive layer, and then cutting a substrate that is 70% the width of the outer film and attaching the substrate to the adhesive layer along the inside of the reinforcing rib.

[0018] Preferably, the adhesive application includes applying an inner adhesive layer to the substrate, and simultaneously applying an adhesive layer to the reinforcing rib. The adhesive layer should be relatively thin. After the adhesive is applied, the thickness of the substrate plus the inner adhesive layer should be equal to the thickness of the reinforcing rib. The inner adhesive layer, the substrate, and the reinforcing rib should form a single finished plane to facilitate the bonding of another outer film.

[0019] The advantages of this invention over the prior art are:

[0020] This invention provides a composite sandwich layer between the outer film and the adhesive layer. The sandwich layer includes a reinforcing rib on one side and a substrate and an inner adhesive layer on the other side of the reinforcing rib. When using this double-sided adhesive, the outer film is peeled off, and then the side with the inner adhesive layer is used as the bonding surface and adhered to the packaging box. At this time, the packaging box and the double-sided adhesive are connected by the inner adhesive layer. The reinforcing rib is located on one side of the inner adhesive layer. By peeling off the reinforcing rib, the structure of the double-sided adhesive can be destroyed, allowing the adhesive layer and the packaging box to be separated, facilitating the opening of the packaging box. Attached Figure Description

[0021] Figure 1 The image shown is a schematic diagram of a double-sided adhesive tape.

[0022] Figure 2 The image shown is an illustration of the effect of using double-sided tape.

[0023] Figure 3 The image shown is a planar view of the double-sided tape application effect.

[0024] Figure 4 The diagram shows a notch in the packaging box of a double-sided adhesive tape.

[0025] Reference numerals: 1. Outer membrane; 2. Adhesive layer; 3. Reinforcing rib; 4. Substrate; 5. Inner adhesive layer; 6. Perforated edge; 7. Packaging box; 8. Inner cover; 9. Outer cover; 10. Notch; 11. Tear line. Detailed Implementation

[0026] The technical solution of the present invention will be further described and illustrated below through specific embodiments, making the present invention clearer and more understandable. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0027] like Figure 1-2 As shown, a double-sided adhesive includes an outer film 1 and an adhesive layer 2. An interlayer is provided between the outer film 1 and the adhesive layer 2. The interlayer includes a substrate 4 located on the adhesive layer 2 and an inner adhesive layer 5 located on the substrate 4.

[0028] The reinforcing rib 3 shown is arranged from the outside to the inside along the outer side of the outer membrane 1. The width of the reinforcing rib 3 should be between 10% and 30% of the width of the outer membrane 1. The reinforcing rib is used as a separation component between the double-sided adhesive and the packaging box. Therefore, the width of the reinforcing rib should not be too large. If the width of the reinforcing rib is too large, it will easily reduce the adhesion effect of the double-sided adhesive. If the reinforcing rib is too small, it will easily break during the separation process.

[0029] The inner side of the reinforcing rib 3 is the substrate 4. One side of the substrate 4 is bonded to the adhesive layer 2. The other side of the substrate 4 is provided with an inner adhesive layer 5. After the inner adhesive layer 5 is applied to the substrate 4, the thickness of the substrate 4 plus the inner adhesive layer 5 should be the same as the thickness of the reinforcing rib 3. The outer film is connected and fixed to the inner adhesive layer and the reinforcing rib 3 by adhesive.

[0030] The outer film 1 of the double-sided adhesive shown here is made of release paper.

[0031] The substrate 4 in this double-sided tape is made of composite cotton.

[0032] As shown, several notches can be provided on the outer cover 9 of this packaging box, with the notches evenly distributed along both sides of the outer cover.

[0033] The outer cover shown has a tear line 11. The tear line 11 is set on the outer cover along the notch 10. The tear line 11 is a tear line that is pre-connected in segments on the outer cover by a device. The reinforcing ribs 3 on the double-sided tape are pasted along the tear line. The inner adhesive layer 5 on the double-sided tape should be located on the outer side of the outer cover.

[0034] The reinforcing rib 3 in this double-sided adhesive accounts for 10% to 30% of the interlayer area. The surface of the reinforcing rib is not covered with an adhesive layer. As a tear-splitting component in this double-sided adhesive, the reinforcing rib should ensure its strength and toughness, but its proportion should not be too large. If the proportion is too large, it will easily lead to a weaker adhesive relationship between the inner and outer covers after the inner adhesive layer is reduced. Therefore, the proportion of the reinforcing rib in this invention is approximately between 10% and 30%.

[0035] The present invention is demonstrated through experiments on the proportion of reinforcing ribs as follows:

[0036] Double-sided tape with a width of 1 cm was selected and applied to packaging boxes with cardboard thicknesses of 0.5 cm, 0.7 cm, 1 cm, 1.2 cm, and 1.5 cm. The force required to separate the box cover was tested. The breakage during the tearing of the reinforcing ribs was observed, as well as the sealing between the double-sided tape and the box cover after adhesion. Specific experimental data are as follows:

[0037]

[0038] On 0.5mm thick cardboard, six sets of data were tested, showing the required external force (in Newtons) to separate the packaging box when the reinforcing ribs in the double-sided adhesive were present at percentages of 7%, 10%, 19%, 26%, 31%, and 38%. The results showed that the required external force was 1.1N, 1.3N, 1.5N, 2.1N, 2.2N, and 2.2N, respectively. The occurrence of reinforcing rib breakage under different applied forces was observed and recorded. When the reinforcing rib percentage was less than 10%, the reinforcing rib broke; when the percentage was greater than 10%, it did not. In addition, the adhesion between the covers and the double-sided adhesive was observed under different reinforcing rib ratios. In summary, it is recommended to use a reinforcing rib ratio between 10% and 20% on 0.5mm thick cardboard. This is because the reinforcing ribs will not break if the ratio is higher than 10%, and it takes more force to tear them apart if the ratio is higher than 20%. Furthermore, the adhesion between the double-sided adhesive and the cover is poor when the reinforcing rib ratio is higher than 20%. A higher reinforcing rib ratio reduces the bonding area between the covers and results in less tight local connections. The adhesion effect is significantly worse when the ratio exceeds 30%.

[0039]

[0040]

[0041] On 0.5mm thick cardboard, six sets of data were tested, showing the required external force (in Newtons) to separate the packaging box when the reinforcing ribs in the double-sided adhesive were present at percentages of 7%, 10%, 19%, 26%, 31%, and 38%. The results showed that the required external force was 0.9N, 1.1N, 1.4N, 1.9N, 2.1N, and 2.2N, respectively. The occurrence of reinforcing rib breakage under different applied forces was observed and recorded. When the reinforcing rib percentage was less than 10%, the reinforcing rib broke; when the percentage was greater than 10%, it did not. In addition, the adhesion between the covers and the double-sided adhesive was observed under different reinforcing rib ratios. In summary, it is recommended to use a reinforcing rib ratio between 10% and 20% on 0.7mm thick cardboard. This is because the reinforcing ribs will not break if the ratio is higher than 10%, and it takes more force to tear them apart if the ratio is higher than 20%. Furthermore, the adhesion between the double-sided adhesive and the cover is poor when the reinforcing rib ratio is higher than 20%. A higher reinforcing rib ratio reduces the bonding area between the covers and results in less tight local connections. The adhesion effect is significantly worse when the ratio exceeds 30%.

[0042]

[0043]

[0044] On 0.5mm thick cardboard, six sets of data were tested, showing the required external force (in Newtons) to separate the packaging box when the reinforcing ribs in the double-sided adhesive were 7%, 10%, 19%, 26%, 31%, and 38% of the material. The results showed that the required external force was 1.1N, 1.3N, 1.7N, 2.1N, 2.3N, and 2.5N, respectively. The occurrence of reinforcing rib breakage under different applied forces was observed and recorded. When the reinforcing rib percentage was less than 10%, the reinforcing rib broke; when the percentage was greater than 10%, it did not. Furthermore, the adhesion between the covers and the double-sided adhesive was observed under different reinforcing rib ratios. In summary, for 1.0 thickness cardboard, it is recommended to use a reinforcing rib ratio between 20% and 30%. This is because the reinforcing ribs will not break if the ratio is higher than 10%, and a certain amount of force is required to tear them apart if the ratio is higher than 20%. Moreover, the adhesion between the double-sided adhesive and the cover is poor when the reinforcing rib ratio is higher than 30%. A higher reinforcing rib ratio reduces the bonding area between the covers, resulting in less tight local connections. In particular, the adhesion effect deteriorates significantly when the ratio exceeds 30%.

[0045]

[0046]

[0047] On 0.5mm thick cardboard, six sets of data were tested, showing the required external force (in Newtons) to separate the packaging box when the reinforcing ribs in the double-sided adhesive were 7%, 10%, 19%, 26%, 31%, and 38% of the material. The results showed that the required external force was 1.2N, 1.3N, 1.9N, 2.2N, 2.3N, and 2.5N, respectively. The occurrence of reinforcing rib breakage under different applied forces was observed and recorded. When the reinforcing rib percentage was less than 10%, the rib broke; when it was higher than 10%, it did not. In addition, the adhesion between the covers and the double-sided tape was observed under different reinforcing rib ratios. In summary, it is recommended to use a reinforcing rib ratio between 20% and 30% on 1.2mm thick cardboard. This is because the reinforcing ribs will not break if the ratio is higher than 10%, and a certain amount of force is required to tear them apart if the ratio is higher than 20%. Furthermore, the adhesion between the double-sided tape and the cover is poor when the reinforcing rib ratio is higher than 30%. A higher reinforcing rib ratio reduces the bonding area between the covers and results in less tight local connections. The adhesion effect is significantly worse when the ratio exceeds 30%.

[0048]

[0049] On 0.5mm thick cardboard, six sets of data were tested, showing the required external force (in Newtons) to separate the packaging box when the reinforcing ribs in the double-sided adhesive were 7%, 10%, 19%, 26%, 31%, and 38% of the material. The results showed that the required external force was 1.5N, 1.8N, 2.2N, 2.6N, 2.7N, and 2.9N, respectively. The occurrence of reinforcing rib breakage under different applied forces was observed and recorded. When the reinforcing rib percentage was less than 10%, the rib broke; when it was higher than 10%, it did not. In addition, the adhesion between the covers and the double-sided tape was observed under different reinforcing rib ratios. In summary, it is recommended to use a reinforcing rib ratio between 20% and 30% on 1.5mm thick cardboard. This is because the reinforcing ribs will not break if the ratio is higher than 10%, and a certain amount of force is required to tear them apart if the ratio is higher than 20%. Furthermore, the adhesion between the double-sided tape and the cover is poor when the reinforcing rib ratio is higher than 30%. A higher reinforcing rib ratio reduces the bonding area between the covers and results in less tight local connections. The bonding effect is significantly worse when the ratio exceeds 30%.

[0050] The double-sided adhesive tape of the present invention has a reinforcing rib ratio between 10% and 30%, which can effectively solve the problem of breakage during the tearing of the reinforcing rib. Within this range, the adhesive strength of the double-sided adhesive tape is optimal. If it is too large, the adhesive effect is weak; if it is too small, the reinforcing rib is prone to breakage. Users can choose double-sided adhesive tape with different reinforcing rib ratios according to the thickness of the cardboard.

[0051] A manufacturing process for double-sided tape, characterized by comprising the following steps:

[0052] S1. Lamination: Take two portions of the outer film and apply an adhesive layer onto the outer film.

[0053] S2, Composite: The substrate is bonded to the adhesive layer, and then a reinforcing rib is bonded to one side of the substrate. The height of the reinforcing rib should be higher than that of the substrate.

[0054] S3. Apply adhesive: Apply an inner adhesive layer to the substrate so that the sum of the height of the substrate and the inner adhesive layer after applying the adhesive layer is equal to the height of the reinforcing rib. The substrate, inner adhesive layer and reinforcing rib after applying adhesive form a sandwich layer. The surface of the sandwich layer should be flat.

[0055] S4. Lamination: After the adhesive is applied, another outer film is laminated onto the interlayer surface. Once the outer film is laminated, it can be rolled up and stored.

[0056] The composite shown includes cutting a reinforcing rib that is 30% of the width of the outer film, then attaching the reinforcing rib to the adhesive layer, and then cutting a substrate that is 70% of the width of the outer film and attaching the substrate to the adhesive layer along the inside of the reinforcing rib.

[0057] The adhesive application process includes applying an inner adhesive layer to the substrate, and simultaneously applying an adhesive layer to the reinforcing rib. The adhesive layer should be relatively thin. After the adhesive is applied, the thickness of the substrate plus the inner adhesive layer should be equal to the thickness of the reinforcing rib. The inner adhesive layer, the substrate, and the reinforcing rib should form a single finished plane to facilitate the bonding of another outer film.

[0058] The production process of this double-sided tape requires taking two outer films first. Then, an adhesive layer is applied to one of the outer films. After applying the adhesive layer, it is allowed to cool and solidify, typically within 30-60 minutes. During this cooling process, reinforcing ribs are cut, with the rib dimensions being 10%-30% of the outer film size. After cutting, once the adhesive layer has completely cooled, the cut reinforcing ribs are bonded along the edge of the adhesive layer from the outside in. After bonding the reinforcing ribs, the substrate is placed along the inner side of the reinforcing ribs and then bonded to the adhesive layer. Apply an inner adhesive layer to the surface of the substrate. After applying the inner adhesive layer to the substrate, the sum of the thickness of the inner adhesive layer and the substrate should be equal to the thickness of the reinforcing rib. After applying the inner adhesive layer to the substrate, the surface of the inner adhesive layer and the surface of the reinforcing rib should be at the same height and form a complete surface. Of course, when applying the inner adhesive layer, a thin layer of adhesive can also be applied to the reinforcing rib to facilitate subsequent work. After the inner adhesive layer is applied, take another outer film and stick it on top. Then, roll and package the finished double-sided tape using equipment.

[0059] The method of using this double-sided tape is as follows: Affix the double-sided tape to the cover of the packaging box 7. The cover of the packaging box 7 includes an inner cover 8 and an outer cover 9. First, apply the double-sided tape to the outer cover 9, which has a notch 10. The adhesive layer 2 of the double-sided tape is then adhered and fixed at the notch 10 position on the outer cover 9. The reinforcing rib side of the double-sided tape should be positioned on the inner side of the outer cover. After applying the adhesive layer 2, remove the outer film 1 from the double-sided tape. The double-sided tape after removing the outer film 1 will bond the outer cover 9 and the inner cover 8 together through the inner adhesive layer 5. At this point, the packaging of the box is complete. When the user receives the packaging box, the double-sided tape is then applied through the reinforcing rib 3 on the notch 10. Peeling is straightforward. During the peeling process of reinforcing rib 3, since there is a notch 10 on the packaging box, which serves as a guide and facilitates tearing, the user can locate the reinforcing rib in the double-sided tape at the notch 10. Because the surface of the reinforcing rib is not adhesive, the reinforcing rib position in the double-sided tape is not attached to the inner cover. The user only needs a small amount of force to peel the reinforcing rib outwards along the notch. Since the peeling direction of the reinforcing rib is upwards, and the reinforcing rib was set on the inside side of the outer cover when it was pasted, after the reinforcing rib and double-sided tape are peeled off, the outer cover is divided into two parts, the inner and outer covers, which are not connected. At this point, the packaging box cover can be opened. It should be noted that the illustrations provided in the above embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show components related to the present invention and are not drawn according to the actual number, shape, and size of components in implementation. In actual implementation, the type, quantity, and proportion of each component can be arbitrarily changed, and the component layout may also be more complex. This invention may also include other equivalent embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure shall be included within the protection scope of this disclosure.

Claims

1. A production process of double-sided adhesive tape, characterized in that, It comprises the following steps: S1, film covering, taking two outer films, and coating a glue layer on the outer film; S2, compounding, adhering a base material on the glue layer, and then adhering a reinforcing rib on one side of the base material, at this time the height of the reinforcing rib should be higher than that of the base material; S3, glue brushing, coating an inner glue layer on the base material, so that the sum of the height of the base material after coating the glue layer and the inner glue layer is equal to the height of the reinforcing rib, the base material after glue brushing, the inner glue layer and the reinforcing rib are sandwiched, and the surface of the sandwiched layer should be flat; S4, compounding, adhering another outer film on the surface of the sandwiched layer after glue brushing, and winding and storing the outer film after compounding is completed; The compounding comprises cutting, cutting the reinforcing rib with a size of 30% of the width of the outer film, then adhering the reinforcing rib on the glue layer, and then cutting the base material with a size of 70% of the width of the outer film, and adhering the base material on the glue layer along the inner side of the reinforcing rib; The glue brushing comprises coating an inner glue layer on the base material, coating a layer of adhesive on the reinforcing rib while coating the base material, the thickness of the adhesive should be relatively thin, after the completion of the adhesive, the thickness of the base material plus the inner glue layer should be equal to the thickness of the reinforcing rib, and the inner glue layer, the base material and the reinforcing rib should be a completed plane, which is convenient for adhering another outer film.

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