UV extruding and transfer printing forming process

A molding process and printing layer technology, applied in the field of UV extrusion transfer molding process, can solve the problem of low curvature and achieve the effect of high curvature extrusion transfer and good adhesion

Inactive Publication Date: 2011-08-31

CORYOR SURFACE TREATMENT

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AI-Extracted Technical Summary

Problems solved by technology

[0008] The main technical problem to be solved by the present invention is to overcome the disadvantage that the existing UV protective layer transfer film is only suitable for workpieces with low curvature, and to provide a UV extrusion transfer molding process, which is a method for plastic extrusion or hair. The extruded transfer printing process of foam extruded products undergoes secondary dryin...

Method used

[0044] The aforementioned extrusion transfer printing process is formed in the base layer 11 by the release layer 12, the UV protective layer 13, the printing layer 14 and the hot melt adhesive layer 15 in the first stage drying step 21, and the UV protective layer 13 is formed on the base layer 11. It still maintains flexible ductility without being irradiated by UV ultraviolet rays, so that it can be surface-attached to workpieces with more curvature, and it can still remain unbroken when pressed by a pressure wheel, thereby enhancing the UV protective layer13...

Abstract

The invention relates to an ultraviolet (UV) extruding and transfer printing forming process, which comprises the following steps of: performing first-stage drying, namely heating a transfer printing film which is provided with a basal layer, a de-bonding layer, a UV protective layer, a printing layer and a hot melt adhesive layer in turn, so that the de-bonding layer, the UV protective layer, the printing layer and the hot melt adhesive layer can be formed on the basal layer, and the UV protective layer is kept to have flexural ductility; performing extruding and transfer printing, namely heating to melt the hot melt adhesive layer, pressing and attaching one side of the hot melt adhesive layer of the transfer printing film to the surface of an extruded workpiece by using a pressing wheel, so that the printing layer and the UV protective layer can be adhered to the surface of the extruded workpiece by the hot melt adhesive layer; de-bonding, namely tearing off the basal layer, and ensuring that the UV protective layer and the printing layer are still adhered to the surface of the extruded workpiece by the hot melt adhesive layer; and performing second-stage drying, namely irradiating UV rays to the surface of the extruded workpiece to facilitate curing the UV protective layer. By the process, the UV protective layer still keeps flexural tension and high adhesion in the extruding and transfer printing process, and high-curvature extruding and transfer printing without fragmentation can be performed.

Application Domain

Decorative surface effects

Technology Topic

DuctilityEngineering +7

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Examples

Experimental program(1)

Example Embodiment

[0037] The present invention relates to a UV extrusion transfer molding process, which is an extrusion transfer process for secondary drying and molding of plastic extrusion, foaming extrusion or injection molding products. The UV protection layer is provided through the secondary drying method. It is formed on the transfer film, and the transfer film with UV protection layer is subjected to the extrusion transfer process, so that the UV protection layer can still maintain its flexural tension and good adhesion during the extrusion transfer process to achieve high curvature Extrude the transfer without breaking, please refer to figure 1 As shown, it is the transfer film required for the "UV extrusion transfer molding process" of the present invention;

[0038] The transfer film sequentially has a base layer 11, a release layer 12, a UV protection layer 13, a printing layer 14 and a hot melt adhesive layer 15. The base layer 11 serves as the UV protection layer 13, the printing layer 14 and the hot melt The adhesive layer 15 is a medium that can be attached to the surface of the workpiece when it is not extruded and transferred. The base layer 11 is usually a plastic film with bidirectional extension characteristics such as PET or PVC. The release mold 12 is used for extruding and transferring the transfer film. During printing, the base layer 11 can be removed without being affected by the hot melt adhesive layer 15. The UV protection layer 13 is used to protect the printing layer 14 attached to the surface of the workpiece. The printing layer 14 is coated with a pattern required by the user. And the printing layer 14 is formed on the UV protection layer 13 by holographic imprinting. The hot melt adhesive layer 15 is used to attach the UV protection layer 14 and the printing layer 15 to the surface of the workpiece after transfer, and the release layer 12. The UV protection layer 13, the printing layer 14, and the hot melt adhesive layer 15 are attached to the base layer 11 by heating and drying in sequence;

[0039] Continued figure 2 As shown, the transfer process of the "UV extrusion transfer molding process" of the present invention includes:

[0040] The first stage drying step 21 is to sequentially heat the transfer film with the base layer 11, the release layer 12, the UV protection layer 13, the printing layer 14, and the hot melt adhesive layer 15, so as to facilitate the release layer 12, The UV protective layer 13, the printing layer 14, and the hot melt adhesive layer 15 can be formed on the base layer 11 and maintain the flexibility of the UV protective layer 13. The first stage drying step 21 is performed on the transfer film by far infrared rays or hot air. 8~10 minutes of drying;

[0041] The extruding transfer step 22 is to heat the hot melt adhesive layer 15 to melt it, and press the hot melt adhesive layer 15 of the transfer film to the surface of the extruded workpiece through a pressing wheel, so that the hot melt adhesive layer 15 can be adhered The printing layer 14 and the UV protection layer 13 are on the surface of the extruded workpiece;

[0042] In the release step 23, the base layer 11 is torn off, and the UV protection layer 13 and the printing layer 14 still have to be adhered to the surface of the extruded workpiece by the hot melt adhesive layer 15;

[0043] The second-stage drying step 24 is to irradiate the surface of the extruded workpiece with UV ultraviolet rays to facilitate curing of the UV protective layer 13. The second-stage drying step 24 is to irradiate the UV protective layer 13 with ultraviolet rays for about 3 seconds;

[0044] In the first drying step 21 of the aforementioned extrusion transfer process, the release layer 12, the UV protection layer 13, the printing layer 14 and the hot melt adhesive layer 15 are formed on the base layer 11. The UV protection layer 13 is not exposed to UV It is irradiated by ultraviolet rays and still maintains the flexibility and ductility, so that it can be attached to the surface of the workpiece with more curvature, and the pressure wheel can still remain uncracked when pressed, thereby improving the adhesion of the UV protective layer 13 In addition, in the second drying step 24, the UV protective layer 13 is irradiated by UV ultraviolet rays to produce a hardening effect, so that a protective UV protective layer 13 is produced. Therefore, the second step is performed through the transfer film before and after the extrusion transfer process. The secondary drying process of the first-stage drying step 21 and the second-stage drying step 24 can effectively overcome the disadvantage of UV materials that are unfavorable for the adhesion of high-curvature objects in the field of extruded transfer operations.

[0045] Continued image 3 As shown, it is a schematic diagram of the transfer implementation of the "UV extrusion transfer molding process" of the present invention. First, the transfer film that has completed the first stage of drying step 21 is output through a sending tray 31, and then a heating device 32 transfers the transfer film. The hot-melt adhesive layer 15 of the film is heated to melt, and then the hot-melt adhesive layer 15 of the transfer film is pressed against the surface of the extruded workpiece 34 by the pressure roller group 33, and the extruded transfer step 22 is completed. After the film passes through the pressing roller set 33 to complete the imprinting action, a reel 35 continues to tear off the base layer 11 of the transfer film, so that the UV protection layer 13 and the printing layer 14 are still adhered to by the hot melt adhesive layer 15 The surface of the workpiece 34 is extruded, and thus the separating step 22 is completed. Finally, the surface of the extruded workpiece 34 is irradiated with UV ultraviolet rays by the ultraviolet irradiation device 36 to facilitate the curing of the UV protective layer 13, thus completing the manufacturing process of the present invention.

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UV extruding and transfer printing forming process

A molding process and printing layer technology, applied in the field of UV extrusion transfer molding process, can solve the problem of low curvature and achieve the effect of high curvature extrusion transfer and good adhesion

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

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Description & Claims & Application Information

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