AU2015100880A4 - Method for fabricating bubbler - Google Patents

Abstract

Abstract A method for fabricating a bubbler is disclosed, which is performed by lamin atin g a poly propylene (P P) , P E, CPET film onto a paper material surface to form a PP, PE, CPET film, and then screen printing or coating a hydrophilic polyure thane (P U) mate rial on to another surface of the paper material to form a hyd roph il ic PU foaming material, then color printing a print material onto the hydrophilic foaming film to fo rm a pa t te rn lay e r, trim ming the pape r mate rial to form a paper plate having a desired range, and fo rmin g t h e p a pe r p la te as a n u te n sil, and enabling the hydrophilic PU foaming film to form a three dimensional pattern area on a surface of the utensil by being heated and thus foaming with a heating temperature presen ting when the utensil is formed, whereby a three dimensional pattern area may be directly formed onto a surface of a utensil by using a hydrophilic PU foaming film without requiring a binding agent, so as to increase a fabricating speed and reduce a fabricatin g cost, an d fu rthe r have an increased thickness, a bette r hyd rolysis proofing, a bette r scrape proofing, an d a bette r heat isolation. CA)

Description

METHOD FOR FABRICATING BUBBLER Field of the invention The presen t inve n tion relates to a method for fabricating a bubbler and particularly to a method for fabricating a bubbler so that a three dimensional pattern area may be directly formed on to a surface of a utensil by using a hydrophilic PU foaming film without requiring a binding agent, so as to increase a fabricating speed and reduce a fabricating cost, an d fu rthe r have an increased thickness, a better hyd rolysis proofing, a better scrape proofing, an d a better heat isolation. Description of the Related Art In fabricating a foaming material heat-isolated container, a PP or PE or PS material is coated on a surface of the container as a foaming material, and then the container and the foaming 1 mate rial are concurrently basked to form a foaming layer on the con tainer surface with the PP or PE material. However, the PE, PP or PS material being completely a plastic material usually has a poor foaming result when being baked. The PE material may be apt to fall off when being baked up to 120 C, and the PP material may be damaged. In this manner, when the PE and PP foaming material forms the foaming layer, the foaming layer may usually have the shortcomings of a small thickness, a poor heat isolation effect, etc. Furthermore, the baked container may be filled with air holes or irregular surface topology, resulting in the demerits of vague pattern or color or difficult printing. Taiwan patent 1271364 disclosed an improved method for fabricating a paper mad e co n tain e r with a h e a t isola tion su rface laye r, whe re a com posite coating material is formed by agitating 2 and thus mixing a liquid binding agent (polyvin ylace tate e thyle ne or polyvinylacetate) and the rmally foaming particle powders (thermally copolymer with a low boiling point solvent covered inside). This liquid coating material is applied on to a surface of the pape r made con taine r an d the con taine r is then subject to a tem perature of 1 00 C to 140 0 C. The thermally foaming particle powders are provided to foam and the liquid binding agent is adhered to the surface of the paper made container, forming a foaming layer on the surface. In addition, the composite coating material in the patent is doped with the liquid binding agent of polyvinylace tate e thyle ne or polyvinylacetate having a concentration of 5% ~ 20%. However, the foaming layer is apt to fall off whenever encountering water owing to its material characteristics. Therefore, the conventional foaming material does not 3 meet with the requirement for an actual use. Summary of the invention It is a main objet of the present inven tion to provide a me thod for fabricating a bubbler to overcome the shortcoming encountered in the prior art, so that a three dimensional patte rn area may be directly formed onto a surface of a u te nsil by usin g a hydrophilic PU foaming film without re q uirin g a bin d in g age n t, so as to increase a fabricating speed and reduce a fabricatin g cost, an d fu rthe r have an increased thickness, a better hydrolysis proofing, a be tte r scrape proofing, an d a be tte r he at isolation. According to the present invention the method for fabricating the bubbler comprises steps of (a)preparing a paper material, applying an extrusion coating on a first surface of the paper material 4 laminating a poly propylene (PP) material onto the first surface of the paper material to form a PP film; (b)subjecting a second surface of the paper material to a screen printing process, screen printing a hydrophilic polyurethane (PU) foaming material onto the second surface of the paper material to form a hydrophilic PU foaming film; (c) color printing a print material onto the hydrophilic foaming film to form a pattern laye r; (d) trimming the paper material to form a paper plate having a desired range; an d (e)forming the paper plate as an utensil, and enabling the hydrophilic PU foaming film to form a three dimensional pattern area on a surface of the utensil by being heated and thus foaming with a heating temperature presen ting when the u tensile is formed. In an embodiment, the utensil is selected from a group consisting of a paper made cup, a paper made tray, and 5 a paper made dinner pail. In an embodiment, the color printing is in step (c) selected from a group consisting of an ultraviolet (UV) prin tin g, an off-se t p rin tin g, o r a general ink printing. In an embodiment, step (e) is pe rformed un de r the tem pe rature of from 250 to 350 C for less than two seconds to enable the hyd roph ilic PU foaming film to completely foam. In an embodiment, the hydrophilic PU foaming film becomes to have a thickness of at least six times after being heated within the short time period to form the three dimensional pattern area. Brief descriptions of the drawings The presen t inven tion will be better understood from the following d e tale d d escriptions of the prefe rre d embodiments according to the present invention, taken in conjunction with the accompanying drawings, in which: 6 F I G. 1 is a s ch e m a tic d ia g ra m of a n extrusion coating according to the present inven tion; FIG. 2 is a schematic diagram of a screen printing according to the prese n t inve n tion; FIG. 3 is a schematic diagram of a color printing according to the prese n t invention; FIG. 4 is a schematic diagram of a paper material trim according to the presen t inven tion; FIG. 5 is a schematic diagram of a concurren t forming and foaming accordin g to the prese n t invention; and FIG. 6 is a schematic diagram of a cross sectional view of a bubbler according to an embodiment of the present invention. Description of the preferred embodiments Referring to FIG. 1 through FIG. 6, a schematic diagram of an 7 extrusion coating according to the presen t inven tion, a schematic diagram of a screen printing according to the present invention; a schematic diagram of a color printing according to the presen t inven tion, a schematic diagram of a paper material trim according to the prese n t inve n tion, a schematic diagram of a concurren t forming and foaming according to the prese n t inve n tion, and a schematic diagram of a cross sectional view of a bu bble r according to an embodiment of the presen t inven tion are shown, respectively. At first, a paper material 10 is pre pared, an extrusion coating process is applied onto a first surface 101 of the paper material 10, a polypropylene (PP) mate rial is laminated on to the first surface 101 of the paper material 8 10 to form a PP , PE or CPET film 2, as is shown in FIG. 1. Next, a second surface 102 of the paper mate rial 10 is su bject a screen printing process, a hydrophilic polyurethane (PU) foaming material is screen printed onto the second surface 102 of the paper material 10 to form a hydrophilic PU foaming film 3. Thereafter, a print material is color printed onto the hydrophilic foaming film 3 to form a pattern layer 4 by using a ultraviolet (UV) printing, an off-s e t p rin tin g , o r a g e n e r al in k printing. Subsequen tly, the paper material is trimmed to form a paper plate 10a having a desired range, as is shown in FIG . 4. Then, the paper plate 10a is formed as an utensil 1, and the hydrophilic PU foaming film 3 is enabled to form a three dimensional pattern area on a surface of the u te nsil 9 1 by being heated and thus foaming with a heating tem pe rature presen ting when the utensil 1 is formed, where the temperature is provided from 250 to 350 'C for less than two seconds to enable the hydrophilic PU foaming film 3 to completely foam, thereby forming a three dimensional pattern area 3a on a su rface of the u te nsil 1, as is shown FIG. 5. At this time, the hydrophilic PU foaming film 3 becomes to have a thickness of at least six times after being heated within the short time period to form the three dimensional patte rn area 3a. As such, the three dimensional pattern area 3a may be directly formed on to the su rface of the u te nsil immediately by using the hydrophilic PU foaming film, without requiring an additional binding agent. Furthermore, such formed bubbler has the efficacies of an increased thickness, a be tte r hyd rolysis proofing, a be tte r scrape 10 proofin g, an d a be tte r he at isolation. The utensil 1 may be a paper made cup, a paper made tray, or a paper made dinner pail, as is shown in FIG. 6 and the paper made cup in this embodiment as an example. As such, a novel method for fabricating a bubbler is completely provided. In s u m m a ry , t h e m e t h o d fo r fabricating a bubbler of the present invention may effectively overcome the shortcoming encountered in the prior art, in which the three dime nsion al pattern area may be directly formed on to the surface of the utensil by using the hydrophilic PU foaming film without requiring the binding agent, so as to increase a fabricating speed and reduce a fabricatin g cost, an d fu rthe r have an increased thickness, a bette r hyd rolysis proofing, a be tte r scrape proofing, an d a bette r he at isolation. From all these views, the presen t invention may be deemed as being more 11 effective, practical, useful for the consumer's demand, and thus may meet with the re quire me n ts for a patent. The above describe d is me rely exam ples an d pre fe rre d e m bodime n ts of the presen t inven tion, an d not exemplified to intend to limit the present invention. Any modifications and changes without departing from the scope of the spirit of the present inve n tion are d ee me d as within the scope of the presen t inven tion. The scope of the present invention is to be interpreted with the scope as define d in the claims. 12

Claims (1)

1. A method for fabricating a bubbler, comprising steps of: (a)pre paring a pape r mate rial, applying an extrusion coating on a first surface of the paper material laminating a poly propylene (PP) material onto the first surface of the pa pe r m a te rial to fo r m a P P film ; (b)subjecting a second surface of the paper material to a screen printing process, screen printing a hydrophilic polyurethane (PU) foaming material onto the second surface of the paper material to form a hydrophilic PU foaming film; (c) colo r p rin tin g a p rin t m a te rial onto the hydrophilic foaming film to form a patte rn laye r; (d) trimming the paper material to form a pape r plate havin g a d esired range; and (e)forming the paper plate as an 13 u te n sil, a n d e n a b lin g t h e h y d ro p hilic PU foaming film to form a three dimensional pattern area on a surface of the utensil by being heated and thus foaming with a heating temperature presenting when the utensil is formed. 14