MXPA00009709A

MXPA00009709A - Manufacturing process of a multi-layer adhesive tape.

Info

Publication number: MXPA00009709A
Authority: MX
Inventors: Cheng-Kang Kao
Original assignee: Four Pillars Entpr Corp
Priority date: 2000-10-03
Filing date: 2000-10-03
Publication date: 2002-12-16

Abstract

Herein is depicted a process for manufacturing a multi- layer adhesive tape roll which is easy to carry. The flat piece of multi-layer adhesive tape easy to carry is formed by compressing the adhesive tape roll having circular shape or other shapes. The adhesive tape roll compresses and adheres during compression. For instance, it is applied a interfacial rigid layer having adhesion to the symmetry plane of the adhesive tape, adhering the two outmost internal adhesive surfaces, providing a material with more adhesion, inserting a solid and rigid material or a solid and rigid material covered with a material of great adhesion, during compression. The preferred high adhesion material is a cyanoacrylate adhesive or an epoxy adhesive.

Description

PROCESS FOR MANUFACTURING AN ADHESIVE TAPE OF MULTIPLE LAYERS BACKGROUND OF THE INVENTION Field of the Invention The invention relates in general to a special process for manufacturing a roll of multilayer adhesive tape, wherein the flat piece of the multilayer adhesive tape is an easy-to-carry and space-saving adhesive tape. for convenient transportation.

Description of the Related Art Conventional adhesive tapes are usually designed with an internal circular center, such as for example a paper center, a plastic center or a similar center. Recent developments have led to flat adhesive tapes 12. Flat, orthogonal hollow plastic tubes are manufactured by ejection molding or flat and square hollow paper tubes are designed by folding paperboard, as shown by reference number 10 of the Figure 1. The adhesive tape is then unwound from a jumbo-sized roll and cut longitudinally into the desired tape. ^ The tubes 10 are individually winding in the flat adhesive tapes 12. However, this method of manufacture requires a long time of work and a higher cost. Furthermore, this type of flat adhesive tape can not provide the necessary special physical properties, for example, super-transparency and coherence, due to the appearance of bubbles trapped when the adhesive tapes are individually wound. If conventional adhesive tapes are compressed directly into flat adhesive tapes, the inner tubes are distorted and the outer surface of the adhesive tapes is deformed by the applied stress. In addition, in the distorted material, for example, in the tube and in the tape, a great rebound force remains. The more distortion is made in a short period of time, the greater the rebound force. In addition, due to the intrinsic properties, such as the viscoelasticity and the memory of the substrate and the adhesive layer of the adhesive tape structure, after the compressive stress is twisted, the relaxation of the structure, accompanied by the force of bounce, bring the adhesive tape to a stable state. The rebound force leads the adhesive tape to recover the original shape of the tape. The intensity of the rebound force depends on the degree of deformation in each position of the adhesive tape. The intensity of the rebound force depends additionally on the thickness of the substrate, the mechanical strength of the substrate, the physical properties of the adhesive layer, the adhesion, the total length, the central length of the plane of symmetry (the internal diameter before to perform the compression step) and the winding tension of the adhesive tape.

SUMMARY OF THE INVENTION The manufacturing process of the multilayer and easy-to-carry adhesive tape of the present invention is suitable for flattening any roll of adhesive tape. • and is susceptible to the automatic production and manufacture of a high quality flat adhesive tape. The flat piece of easy-to-carry multilayer adhesive tape, which is a flat adhesive tape, of the present invention is mainly manufactured by flattening the roll of multilayer adhesive tape which is not flat and having a circular or other shape . During the flattening process, the roll of multilayer and non-planar adhesive tape is compressed and coheres or adheres symmetrically or a rigid interfacial layer having or lacking the property of high adhesion is provided before the compression is compressed. non-flat multilayer adhesive tape. The existence of the rigid interfacial layer produces an extension force along the plane of symmetry of the easy-to-carry flat adhesive tape. This extension force partially reduces the rebound force, which causes the deformation of the flat adhesive tape. If the total length of the flat adhesive tape is not very large, the rebound force is also not very large. Therefore, the Non-flat adhesive tape without paper center can be directly compressed and cohesive by means of the two innermost adhesive surfaces or a rigid and rigid interfacial layer located in the innermost portion of the flat adhesive tape, so as to form a flat piece Nice and easy to carry adhesive tape. The solid and rigid interfacial layer is, for example, adhesive, paperboard, plastic plate, a metal slice or a combination or the like. When the strength of the flat adhesive tape is increased by, for example, increasing the thickness of the substrate with high mechanical strength, increasing the total length of the tape or reducing the internal diameter, the rebound force also increases. Under these circumstances, a layer of high or high adhesion material can be applied to the plane of symmetry of the adhesive tape. The layer of high adhesion material is, for example, polymeric materials of high vitreous transition temperature, thermofix materials, hot melt adhesive materials or adhesive materials that are cured with ultraviolet light to ensure the symmetrical cohesion of the largest portion. internal of the flat adhesive tape. The preferred material for the high adhesion material is a cyanoacrylate adhesive or an epoxy adhesive, which after curing has the property of a high density of crosslinking. After solidifying any mentioned adhesion material, the high adhesion material provides not only the adhesive function but also provides an extension force for holding the flat adhesive tape and partially counteracting the rebound force. Of course, if the high adhesion material is combined with the rigid interfacial layer, it is additionally counteracted by the rebound force and therefore the stability of the flat adhesive tape is increased.

BRIEF DESCRIPTION OF THE DRAWINGS Other objects, features and advantages of the invention will be apparent from the following detailed description of the preferred but not limiting embodiments of the invention. The description will be made with reference to the accompanying drawings, in which: Figure 1 is a schematic cross-sectional view showing a roll of conventional adhesive tape with a paper center and a plastic center having a hollow orthogonal shape; Figure 2A is a schematic cross-sectional view showing a flat adhesive tape having no paper center or plastic center, in accordance with a first preferred embodiment of the present invention; Figure 2B is a diagram showing a schematic cross-sectional view of the flat adhesive tape shown in Figure 2A; Figure 3 is a cross-sectional view showing the flat adhesive tape having a high adhesion layer in the plane of symmetry of the flat adhesive tape shown in Figure 2; Figure 4 is a schematic cross-sectional view showing the flat adhesive tape having a rigid layer in the plane of symmetry of the flat adhesive tape shown in Figure 2; Figure 5 is a schematic cross-sectional view showing the flat adhesive tape having a high adhesion layer and a rigid layer in the plane of symmetry of the flat adhesive tape shown in the Figure 2; Figure 6 is a schematic cross-sectional view showing the flat adhesive tape having a paper or a plastic film, wherein a high adhesion layer is located in the plane of symmetry of the flat adhesive tape; Figure 7 is a schematic cross-sectional view showing the flat adhesive tape having a high adhesion layer and a rigid layer in the plane of symmetry of the flat adhesive tape shown in the Figure 6 '* Figure 8A is a schematic cross-sectional view showing the flat adhesive tape having a rigid layer in the plane of symmetry of the flat adhesive tape shown in Figure 6; Figure 8B is a schematic side view showing the roll of flat adhesive tapes with different widths, where the flat adhesive tapes are placed in a row; Figure 9 is a schematic top view showing the flat adhesive tape having a rigid layer in the plane of symmetry of the flat adhesive tape, wherein the rigid layer is wider than the adhesive tape; Figure 10 is a top schematic view showing the flat adhesive tape having punched holes; Figure 11 is a schematic top view showing the flat adhesive tape having a fastener and a secure cutter; and Figure 12 is a schematic side view showing the container for storing the flat adhesive tape.

DETAILED DESCRIPTION OF THE PREFERRED MODALITIES FIRST FAVORED MODALITY Figures 2A to 2B are schematic cross-sectional views showing the flat adhesive tape of the first preferred embodiment of the present invention. Referring to Figure 2B, an adhesive tape 200 is provided having a substrate 202, a release layer 206 and an adhesive layer 204. The adhesive layer 200 described hereinafter denotes an unrolled adhesive tape. The substrate 202 is composed of, for example, paper, synthetic paper, fabrics, nonwovens, plastic film, embossed plastic film or materials with similar properties, wherein the plastic film is composed of, for example, polypropylene (PP), polyethylene terephthalate (PET), polyethylene (PE), polyethylene naphthalate (PEN), polyimide (Pl), polyvinyl chloride (PVC) or similar. In the present invention, the preferred substrate 202 may also be a metal foil or foil, for example, copper foil, aluminum foil, copper foil with silver electrodeposition on one or both sides, or copper foil with an electrodeposition. tin, chrome, nickel or gold. In addition, the substrate 202 may be a composite film consisting of the metal foils and plastic films mentioned above. An adhesive layer 204 is formed on one side of the substrate 202 and on the other side of the substrate 202 a release layer 206 is formed. The roll of adhesive tape 200 is then wound up to be a multilayer, semi-finished, non-thread adhesive tape. which has a certain length and diameter. The multi-layer adhesive tape, semi-finished and without thread, is then cut into several multilayer adhesive tapes of the appropriate width. These multilayer adhesive tapes are then compressed into a flat shape. The letters TD indicate a transverse direction, which is perpendicular to the plane of symmetry of the flat adhesive tape 220 which is multilayer (hereinafter, the flat adhesive tape denotes a multilayer flat adhesive tape). The letters PD indicate the parallel direction, which is parallel to the plane of symmetry of the flat adhesive tape 220. The symmetrical flat adhesive tape 220 is formed by compressing and self-adhering the innermost surface of the adhesive layer on the plane of symmetry 208 , as shown in Figure 2A.

SECOND PREFERRED MODALITY Additionally, a high layer is placed adhesion 224 in the plane of symmetry 208 of the flat adhesive tape 220 without paper center, as described in the first embodiment. The preferred material of the high adhesion layer 224 is a polymeric material of high glass transition temperature, a thermosetting material, a thermal melt adhesive material and an ultraviolet light curable adhesive material. The material that is preferred as a high adhesion material is a cyanoacrylate adhesive or an epoxy adhesive. The flat adhesive tape 230 is then formed after the compression and cohesion or adhesion steps are performed, as shown in Figure 3. The "cyanoacrylate or epoxy adhesives" in the plane of symmetry can be easily cured and become the layer rigid interface 224. This rigid interfacial layer 224 partially removes the rebound force that causes deformation.

THIRD PREFERRED MODALITY The rigid interfacial layer 226 can be placed in the plane of symmetry of the flat adhesive tape 220 without a paper center, as described in the first embodiment, before the compression step is performed. The preferred interfacial layer 226 has a length equal to or a little shorter than half the length of the innermost circumference of the tape.

Adhesive without paper center. The length of the interfacial layer 226 may be greater than half the length of the innermost circumference of the adhesive tape, due to the existence of the cohesive and extended properties of the adhesive layer. The flat adhesive tape 220 is formed, as shown in Figure 4 after the compression step was performed. The rigid interfacial layer 226 is a solid, flat layer and is composed of, for example, polyethylene, polypropylene, polystyrene, polyester, polycarbonate, polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene (ABS), metal, etc. The preferred material for the interfacial layer 226 is plastic or metal having a high surface energy and polarity. Therefore, the partial rebound force caused by the deformation is reduced by causing the innermost surface of the threadless adhesive tape to adhere to the opposite surfaces of the rigid interfacial layer. Because it is not easy to separate the innermost surface of the adhesive tape from the surfaces of the interfacial layer, the flat shape of the adhesive tape is maintained. FOUR PREFERRED MODALITY The rigid interfacial layer 226 having the property of a high adhesion on its external surface, can be placed in the plane of symmetry of the tape flat adhesive 220 without paper center, as described in the third preferred embodiment, before the compression step is performed. For example, with a layer of high adhesion material 224 the outer surface of the rigid interfacial layer 226 is coated, followed by the placement of the rigid interfacial layer 226 in the plane of symmetry of the adhesive layer 224. A ribbon is then formed flat adhesive 250 after the compression step is carried out on the adhesive layer, as shown in Figure 5. The high adhesion material layer 224 is composed, for example, of a material such as a high temperature polymer material of glass transition, a thermosetting material, a thermal fusion adhesive material and an ultraviolet light curable adhesive material. The preferred high adhesion material is a cyanoacrylate adhesive or an epoxy adhesive having, after curing, the property of a high crosslink density.

FIFTH PREFERRED MODE Figure 6 is a schematic cross-sectional view showing the flat adhesive tape in accordance with the fifth preferred embodiment of the present invention. The adhesive structure of Figure 6 is the same than that of Figure 2B, so that the description of the adhesive structure will be omitted. The adhesive tape is wound into multiple layers in a predetermined length and diameter and on the innermost surface of the adhesive tape a semi-finished product having a layer of material 227 is obtained. The layer of material 227 can be paper, synthetic paper, fabrics , non-woven, plastic, engraved plastic, metal, etc. The semi-finished product is then cut into an adhesive tape 200a with a predetermined width. A layer of high adhesion material or double-sided adhesive tape is then placed between the surface of the paper layers or one of the plastic layers before the compression step is carried out on the semi-finished product. The preferred high adhesion material is an adhesive material, selected from a polymer material of high glass transition temperature, a thermosetting material, a thermal melt adhesive material and an ultraviolet light curable adhesive material. The preferred high adhesion material is a cyanoacrylate adhesive or an epoxy adhesive, which, after curing, has the property of a high crosslink density. The roll of adhesive tape having a circular or non-circular shape is then compressed into a flat adhesive tape 260 having the shape of a flat piece.

Additionally, in the plane of symmetry of the adhesive tape 260 an interphase layer having a high adhesion can also be placed, for example, a rigid interfacial layer 226 coated with a layer of high adhesion material 224, before the compression step is performed. Flat adhesive tape 270, as shown in Figure 7, is formed after the compression step is performed. The interfacial layer 226 can be used without the coating with the high adhesion material, instead of the interfacial layer coated with the high adhesion material. The interfacial layer 226 can extend and flatten the adhesive tape along the plane of symmetry. This causes the roll of adhesive tape to become the flat adhesive tape 280, wherein the interfacial layer 226 has a length greater than or equal to half the length of the innermost circumference of the adhesive tape roll, as shown in FIG. shown in Figure 8A. In addition, before compressing the adhesive tapes, these could be placed in a row of several adhesive tapes of different widths. To the central space, which is the plane of symmetry, a rigid interfacial layer 296 is applied within all the adhesive tapes, wherein the rigid interfacial layer 296 is coated, for example, with a layer of high adhesion material 294.

The adhesive tapes are then compressed to form the easy-to-carry adhesive tapes 290, where the adhesive tapes 290 are placed in a row, as shown in Figure 8B. Additionally, in the plane of symmetry of the adhesive tape roll, a rigid interfacial layer 228 wider than the width of the adhesive tape roll can be used, in order to add the registered trademark of the company or product to the flat adhesive tape. especially, on the roll of opaque adhesive tape. The registered trademark of the company or product is marked on the extended portion of the rigid interfacial layer 228, which protrudes from the roll of adhesive tape. If the rigid interfacial layer 228 is not coated with adhesive material, then the length of the rigid interfacial layer 228 must have a length greater than or equal to half the length of the innermost circumference of the adhesive tape roll, as shown in FIG. Figure 9. It is clear that an adhesive layer (not shown) can be applied to the outer surface of the rigid interfacial layer 228 to reduce the partial rebound force, which causes deformation of the flat adhesive tape 230. For ease of use, perforations 232 can be made along the width, first to fifth preferred embodiments. This makes the tape flat adhesive is converted into a flat adhesive tape 300 having the property of easy tearing or cutting, as shown in Figure 10. Instead of the perforations, a secure cutter 304 can be used in the adhesive tapes 400 for easy removal, as shown in Figure 11. Furthermore, as described, the flat adhesive tape can be placed in a flat rectangular container 500, as shown in Figure 12. If the flat adhesive tape is a transparent adhesive tape, then the registered trademark of the company or the product can be applied to the surface of the interfacial layer 226. Additionally, if the roll of adhesive tape has the rigid interfacial layer, for example, a polyester or a metal foil layer, the deformation of the adhesive will not occur. the adhesive tape, even though the flat adhesive tape almost runs out. Therefore, the flat adhesive tape can still be easily used. In addition, the adhesive surface of the adhesive tape roll can be placed in or out and is not limited to the modes. If the adhesive surface of the tape is placed outwards, then the flat adhesive tape can be used to remove lint and dust from clothing or carpets. Flat adhesive tape also has other benefits, for example, it is easy to find the point where the flat adhesive tape begins, due to adhesion. Other embodiments of the invention will be apparent to those skilled in the art, starting with the consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples are only considered as exemplary, and that the true scope and spirit of the invention are indicated by the following claims.

Claims

CLAIMS: 1. A process for manufacturing a piece of flat adhesive tape, comprising: providing a plane of symmetry of the rigid interfacial layer having a solid and flat shape; encircling the plane of symmetry of the rigid interfacial layer with a multilayer adhesive; and providing a layer of high adhesion material between the rigid interfacial layer and the adhesive layer, wherein the high adhesion material is selected from the group consisting of polymeric material of high glass transition temperature, thermoset material, thermal melt adhesive material and adhesive material for ultraviolet light. The process for manufacturing a piece of flat adhesive tape according to claim 1, wherein the adhesive layer has an internal adhesive surface and further comprises providing a film between the adhesive layer and the layer of high adhesion material. 3. The process for manufacturing a piece of flat adhesive tape according to claim 1, further comprising forming a multitude of perforations in the adhesive tape, wherein the perforations are located along the width of the adhesive tape, so that these segments of the adhesive tape can be removed easily. The process for manufacturing a piece of flat adhesive tape according to claim 1, further comprising providing a fastener having a secure cutter for attaching and holding additionally to the adhesive tape and so that the segments of the adhesive tape can be easily removed. The process for manufacturing a piece of flat adhesive tape according to claim 1, further comprising providing a container with a rectangular and flat shape for the storage of the adhesive tape. The process for manufacturing a piece of flat adhesive tape according to claim 1, wherein the adhesive layer is transparent and the rigid interfacial layer has a mark placed thereon. The process for manufacturing a piece of flat adhesive tape according to claim 1, wherein the width of the adhesive layer is substantially equal to that of the rigid interfacial layer. 8. The process for manufacturing a piece of flat adhesive tape according to claim 7, wherein the adhesive layer has the property of transparency and the rigid interfacial layer has a mark thereon. 9. The process for manufacturing a piece of flat adhesive tape according to claim 7, wherein the adhesive layer has an adhesive surface located facing the rigid interfacial layer. The process for manufacturing a piece of flat adhesive tape according to claim 9, further comprising providing a layer of material between the adhesive layer and the rigid interfacial layer. The process for manufacturing a piece of flat adhesive tape according to claim 10, wherein the layer of material is selected from the group consisting of paper, synthetic paper, fabrics, non-woven materials, plastic, embossed plastic, metal. The process for manufacturing a piece of flat adhesive tape according to claim 7, wherein the adhesive layer has the adhesive surface positioned away from the rigid interfacial layer. The process for manufacturing a piece of flat adhesive tape according to claim 1, wherein the width of the adhesive layer is less than that of the rigid interphase layer, so that a portion of the rigid interfacial layer extends out of the adhesive layer, wherein the extended portion of the rigid interfacial layer is adapted for marking. 14. The process to manufacture a piece of flat adhesive tape, according to claim 13, wherein the adhesive layer has an adhesive surface facing the rigid interfacial layer. 15. The process for manufacturing a piece of flat adhesive tape according to claim 4, further comprising providing a layer of material between the adhesive layer and the rigid adhesive layer. 16. The process for manufacturing a piece of flat adhesive tape, according to claim 15, wherein the layer of material is selected from the group consisting of paper, synthetic paper, fabrics, non-woven materials, plastic, embossed plastic, metal. The process for manufacturing a piece of flat adhesive tape according to claim 13, further comprising an adhesive surface separated from the rigid interfacial layer. 18. A process for manufacturing a piece of flat adhesive tape, comprising: providing a plane of symmetry of the rigid interfacial layer having a solid and flat shape; encircling the plane of symmetry of the rigid interfacial layer with a multilayer adhesive; and providing a layer of high adhesion material between the rigid interfacial layer and the adhesive layer to reduce the rebound force caused by the adhesive tape, wherein the high adhesion material is selected from the group consisting of a high glass transition temperature polymeric material, a thermosetting material, a thermal fusion adhesive material and an ultraviolet light adhesive material. 19. The process for manufacturing a piece of flat adhesive tape according to claim 18, further providing a layer of material between the adhesive layer and the high adhesion material layer. The process for manufacturing a piece of flat adhesive tape, according to claim 19, wherein the layer of material is selected from the group consisting of paper, synthetic paper, fabrics, nonwovens, plastic, etched plastic, metal. 21. A process for manufacturing a piece of flat adhesive tape, comprising: providing a multitude of rolls of multilayer adhesive tape; place rolls of multilayer adhesive tape in a row; inserting a rigid interfacial layer having a solid and planar shape into the central space within the rolls of multilayer adhesive tape; and compress the rolls of. Multilayer adhesive tape on a piece of flat adhesive tape. 22. The process for manufacturing a piece of flat adhesive tape according to claim 21, comprising a layer of high adhesion material between the innermost adhesive surface and the surface of the rigid interfacial layer. 23. The process for manufacturing a piece of flat adhesive tape according to claim 21, wherein the high adhesion material is selected from the group consisting of high glass transition temperature polymeric material, thermosetting material, thermal fusion adhesive material and adhesive material for ultraviolet light. 24. The process for manufacturing a piece of flat adhesive tape according to claim 21, further comprising a layer of material between the innermost adhesive surface of the tape and the surface of the high adhesion material layer. The process for manufacturing a piece of flat adhesive tape according to claim 21, wherein the layer of material is selected from the group consisting of paper, synthetic paper, non-woven fabrics, plastic, embossed plastic, metal. < 26. A process for manufacturing a piece of flat adhesive tape, comprising: forming a multilayer adhesive tape having a plane of symmetry, wherein the adhesive tape of Multiple layers will be wound around the plane of symmetry of the adhesive tape and the innermost and face-to-face portions of the multilayer adhesive tape are bonded. 27. The process for manufacturing a piece of flat adhesive tape according to claim 26, wherein the innermost and face-to-face portions are adhesive surfaces and the adhesive surfaces of the multilayer adhesive tape are placed inwardly and the portions more Internal and face-to-face of the multilayer adhesive tape are joined by the use of the adhesive surfaces. The process for manufacturing a piece of flat adhesive tape according to claim 26, wherein the multilayer adhesive tape further comprises an adhesive surface and an interfacial layer, wherein the adhesive surface of the multilayer adhesive tape is placed outward and the innermost and face-to-face portions of the multilayer adhesive tape are adhered by the use of the interfacial layer. 29. The process for manufacturing a piece of flat adhesive tape according to claim 26, wherein the multilayer adhesive tape also comprises an adhesive surface placed inwardly, a layer of material and an interfacial layer, wherein the surface adhesive is placed on one side of the material layer and the interfacial layer is placed on the other side of the material layer. 30. The process for manufacturing a piece of flat adhesive tape, according to claim 26, wherein the material layer is selected from the group consisting of paper, synthetic paper, fabrics, nonwovens, plastic, etched plastic and metal. The process for manufacturing a piece of flat adhesive tape according to claim 26, wherein the multilayer adhesive tape further comprises a multitude of perforations disposed along the width of the multilayer adhesive tape, so that The segments of the tape can be easily torn or detached from the roll. 32. The process for manufacturing a piece of flat adhesive tape according to claim 26, further comprising a fastener with a secure cutter for attaching and holding additionally the multilayer adhesive tape, so that the segments of the adhesive tape of Multiple layers can be easily removed from the roll. 33. The process for manufacturing a piece of flat adhesive tape according to claim 26, further comprising a rectangular and flat shaped container for storing the multilayer adhesive tape.