TW201507855A - Method to manufacture heat-isolating container - Google Patents

Abstract

A method to manufacture heat-isolating container includes steps below. First, a raw piece is prepared, and two opposite faces of the raw piece are covered with a laminating layer and a PE water-proofing layer respectively. Second, a foam material is applied on the water-proofing layer. Third, an end of the raw piece is folded reversely to foam a flange, and the flange is adhered onto an adhesion portion on the raw piece. Specifically, portion of the flange exposed outside and the adhesion portion are both one of the laminating layer and the water-proofing layer, and portion of the flange folded inward is the other one of the laminating layer and the water-proofing layer. Fourth, the foam material is foamed to form a foam layer. Finally, a heat-isolating container is prepared. Specifically, the laminating layer faces inward, and the water-proofing layer and the foam layer face outward. Thereby, the raw piece can be adhered more tightly, and the outer surface of the container may not be softened when being wet by fluid.

Description

Method for manufacturing a container with an insulated surface

The present invention relates to a method of making a container having an insulated skin.

A container having an insulated surface layer is coated with a foamed layer on the outer surface of the paper to provide a heat insulating effect. However, the foamed layer is often not waterproof, or the outer surface of the container often has only a part of the surface having a foamed layer. When the ice drink is contained, the outer surface may be softened by the condensation of water beads into the paper, and the structural strength of the container is lowered.

On the other hand, as disclosed in the patent TW M355065 or TW M355220, the ring wall is rolled up in a roll shape and then the two ends of the paper are superposed on each other. Therefore, the two surfaces adhered to each other belong to The inner surface and the outer surface of the container. However, in general, the inner surface of the container is usually coated with a plastic coating layer, and the outer surface is coated with a foam layer. The material of the coating layer and the foam layer are usually different, in more detail. It is said that the coating layer on the inner surface of the container must be in contact with food and must have better heat resistance and acid and alkali resistance to prevent decomposition and release of toxins. Therefore, it is necessary to avoid the use of easily decomposable polyethylene and the like, however, heat resistance and Materials with better acid and alkali resistance usually have to be kneaded and processed, and the cost is high. Therefore, other plastics are usually used as the foam layer on the outer surface. Therefore, the two surfaces of the paper bonded contact are classified into two different plastics. Although plastics can be viscous after being heated, different types of plastics have poor adhesion compatibility and may not even be bonded. Therefore, it may be necessary to add an appropriate binder to bond the paper, and additional adhesives may cause Increase, and may release the toxin complex process, and such a simple combination of overlapping sheets and bonding manner easily lead It is possible to leak, and the water droplets on the outer surface of the ice drink are more likely to penetrate into the paper through the seam.

The main object of the present invention is to provide a method for manufacturing a container having an insulating surface layer, which can improve the adhesive strength and prevent the outer wall of the container from softening when wet.

In order to achieve the above object, the present invention provides a method for manufacturing a container having an insulated surface layer, comprising the steps of: (1) preparing a raw substrate made of paper having a first side and a second side opposite to each other; Applying a coating layer on the first surface, the coating layer is selected from the group consisting of polypropylene and polyethylene terephthalate, and coating a waterproof layer on the second surface, the waterproof layer (2) coating a foaming material on the waterproof layer to cover at least a portion of the waterproof layer; (3) one end of the original substrate is folded and pasted to form a predetermined length of the folded edge a first position of the original substrate and the folded edge are close to each other, and the exposed portion of the folded edge is adhered to one of the first positions, wherein the exposed portion of the folded edge and the adhesive portion are both One of the film layer or the waterproof layer, the concavely pasted portion of the folded edge is the other of the shower layer or the waterproof layer; (4) heating the foamed material to foam the foamed material to form a foamed layer, at the same time at least part of the waterproof layer is also thermally foamed, wherein the foaming Waterproof material and material of the layers different from each other; (v) a surface layer made of a heat-insulating container, wherein the lamination layer facing the container The waterproof layer and the foamed layer face the outside of the container.

Therefore, since all the adhesive contacts are the adhesion between the shower layer and the shower layer or between the waterproof layer and the waterproof layer, that is, all the adhesives are adhered to the same type of plastic, so that the adhesive can be better adhered. The strength is to avoid the incompatibility between the different plastics, and the waterproof layer can avoid the water condensation of the outer wall of the container when the ice drink is contained, so that the container absorbs water and softens, thereby enhancing the structural strength and durability, and in addition, the way of folding and pasting It can avoid leakage.

S1‧‧1 is coated with a coating on one side of the original substrate and a waterproof layer on the other side.

S2‧‧‧ coating a foaming material on the waterproof layer

S3‧‧‧Retracting one end of the original substrate to form a fold, and the exposed portion of the folded edge is adhered to one of the original substrates

S3'‧‧‧ affixed the two ends of the original paper to each other by a piece of paper sandwiched between the coating layer at one end of the original paper and the waterproof layer at the other end

S4‧‧‧The foamed material is heated to foam the foamed material to form a foamed layer

S5‧‧‧ made a container with insulated surface

11‧‧‧Original substrate

12‧‧‧Layer layer

13‧‧‧Waterproof layer

14‧‧‧Foam layer

15‧‧‧Folding

20, 20a, 20b, 20c, 20d‧‧‧ paper

21‧‧‧ Paper

22‧‧‧Polyethylene

23‧‧‧Polypropylene or polyethylene terephthalate

Figure 1 is a flow chart of the steps of the present invention.

Figure 2 is a schematic illustration of the formation of a hem in accordance with the present invention.

Figure 3 is a schematic illustration of the completion of the pasting of the present invention.

Figure 4 is a partial cross-sectional view of Figure 2.

Figure 5 is a partial cross-sectional view of Figure 3.

Figure 6 is a schematic view showing the steps of the second embodiment of the present invention.

Figure 7 is a perspective view of a second embodiment of the present invention.

Figure 8 is a cross-sectional view showing a third embodiment of the present invention.

Figure 9 is a cross-sectional view showing a fourth embodiment of the present invention.

Figure 10 is a cross-sectional view showing a fifth embodiment of the present invention.

Figure 11 is a cross-sectional view showing a sixth embodiment of the present invention.

The following is a description of the possible embodiments of the present invention, and is not intended to limit the scope of the invention as claimed.

Referring to FIG. 1 to FIG. 5, the present invention provides a method for manufacturing a container with an insulated surface layer, comprising the following steps: (1) S1: preparing a raw material 11 made of paper or plastic, the original substrate 11 having a relative a first surface and a second surface, coated on the first surface with a coating layer 12, the coating layer 12 is selected from the group consisting of polypropylene and polyethylene terephthalate, and The second surface is coated with a waterproof layer 13 which is composed of polyethylene; (2) S2: a foaming material is coated on the waterproof layer 13 to cover at least a portion of the waterproof layer 13; wherein The foaming material is formed by stirring and mixing a liquid binder and a heat-resistant foamed particle powder, wherein the heat-resistant foamed particle powder is formed by coating a low-boiling solvent in a thermoplastic polymer, and the foaming material can selectively add a pigment. The foamed material has a plurality of colors, and the foamed material can cover only a part of the area of the waterproof layer to match the pattern design or save the material, for example, the foamed material can be patterned or written, or only the finger grip Coating the foamed material with a possible touch, wherein the hair The material and the material of the waterproof layer 13 are different from each other; (3) S3: one end of the original substrate 11 is folded and pasted to form a flange 15 of a predetermined length, and the first position of the original substrate 11 is The flanges 15 are adjacent to each other, and the exposed portions of the flanges 15 are adhered to each other at a position where the exposed portions are adhered to each other, wherein the exposed portions of the folded edges 15 and the adhesive portions are both the coating layer 12 or the waterproof layer 13 In one embodiment, the concave portion of the flange 15 is the other one of the coating layer 12 or the waterproof layer 13; in the main embodiment of the present invention, the exposed portion of the flange 15 and the adhesive portion are both The coating layer 12, the concavely adhered portion of the flange 15 is the waterproof layer 13, and the concave portion of the flange 15 is not coated with the foaming material, whereby all the surfaces adhered to each other are the same plastic; In this embodiment, the coating layer 12 is coated, the waterproof layer 13 and the original substrate 11 of the foamed material have a first end and a first end a second end, the first position is located at the first end, the flange 15 is located at the second end, the first end and the second end are close to each other and rolled up into a roll shape, and thus can be used as a ring of cups The wall, in other embodiments, can be applied between the wall of the cup and the bottom wall. In more detail, the ring wall and the bottom wall of the cup are respectively made of original substrates which are independent of each other, and the folded edges are formed. In one of the ring wall or the bottom wall, the adhesive portion is located on the other of the ring wall or the bottom wall; (4) S4: heating the foam material to foam the foam material to form a foam Layer 14, while at least part of the waterproof layer is also thermally foamed. In more detail, the liquid binder in the foamed material is first softened by heat to reach the softening point to have a slight fluidity, and then continues to heat to make the thermoplastic polymer The low boiling point solvent in the coating is boiled and expanded to expand, and then the thermoplastic polymer is propped up to achieve foaming action to form an insulating foam layer 14 having a predetermined thickness, wherein the low boiling point solvent is in individual foaming. Foaming in the particle powder, it can form a closed bubble, not broken The cracked bubbles do not form a pitted surface on the surface of the foamed layer. Further, the liquid binder fills the gap between the foamed particles by the proper fluidity during the foaming process, and further promotes the surface of the foamed layer. Smoothness; since the waterproof layer is at least partially thermally foamed, even if the waterproof layer 13 is not covered with the foamed material, it can provide some heat insulation, and since the heat conduction rate of the waterproof layer is fast, Promoting the foaming rate of the foamed material; (5) S5: forming a container with an insulated surface, wherein the coating layer 12 faces the container, and the waterproof layer 13 and the foaming layer 14 face the outside of the container Therefore, the coating layer has a good heat resistance, acid and alkali resistance, and is not easily decomposed to release toxins, and can directly contact the food without hindrance. As for the waterproof layer, since polyethylene is used, the cost is low and not It must be mixed, easy to process and provide good water resistance. It can avoid the condensation of water on the cup wall when the ice drink is applied, so that the cup body softens, and the micro-foamed waterproof layer can provide additional insulation effect. In turn, it can reduce foaming materials The amount of material used.

In addition to the above-mentioned manner of folding, the same concept can be used to prepare the container with the insulated surface layer, which can be achieved by the following steps, as shown in FIG. 6 to FIG. 11 : (1) S1: preparing a paper system The original substrate 11 has a first surface and a second surface opposite to each other, and a coating layer 12 is coated on the first surface, and the coating layer 12 is selected from the group consisting of polypropylene and poly(p-phenylene). a group consisting of ethylene glycol diester, and coating a waterproof layer 13 on the second surface, the waterproof layer 13 is composed of polyethylene; (2) S2: coating a foaming material on the waterproof layer 13 To cover at least a portion of the area of the waterproof layer 13, which is carried out as described above; (3) S3': the first side of the original paper 11 is turned inward and the second side is rolled outward, the original paper 11 The area having a predetermined area at one end is a waterproof layer 13 not covered by the foamed material, and a sheet of paper 20 is sandwiched between the area of the waterproof layer 13 not covered by the foamed material and the first side of the other end of the original paper 11 Between the two ends of the original paper 11 by the paper sheet 20 adhered to each other; (4) S4: heating the foamed material to make the foamed material Forming a foamed layer 14 while at least a portion of the waterproof layer 13 is also thermally foamed; (5) S5: forming a container with an insulated surface, wherein the coating layer 12 faces the container, the waterproof Layer 13 and the foam layer 14 face the outside of the container.

In particular, since the adhesion property of the paper material to polyethylene, polypropylene or polyethylene terephthalate is good, the paper sheet 20b may not be coated with any material on only two sides. That is, bonding is performed, as shown in FIG. 9, to avoid the problem of poor adhesion between the coating layer and the waterproof layer; however, in a preferred embodiment, please refer to FIGS. 8, 10 and 11, the sheet 20a , 20c, 20d can selectively face the side of the waterproof layer 13 of the paper 21 The polyethylene 22 is coated, or a side of the paper 21 facing the coating 12 is coated with polypropylene or polyethylene terephthalate 23 (the same material as the coating 12), which is improved by the contact of the same materials with each other. Adhesive force to avoid the problem that the coating layer and the waterproof layer are difficult to adhere to each other.

Therefore, since all the adhesively bonded surfaces are of the same type of plastic, the incompatibility of the different types of plastics is avoided, and no additional adhesive is needed, thereby improving the strength of the adhesion and avoiding cracking or leakage. By means of the waterproof layer, it is possible to avoid the condensation of the outer surface of the water droplets during the ice-filling, which causes the container to soften and affect the structural strength, and the micro-foaming of the waterproof layer can provide additional heat insulation, which can not only reinforce the uncovered hair. The area of the bubble layer and the material for saving the foaming material can further create a three-dimensional change of the concave and convex by the height difference caused by the degree of foaming of the foamed layer, and the effect is improved.

S1‧‧1 is coated with a coating on one side of the original substrate and a waterproof layer on the other side.

S2‧‧‧ coating a foaming material on the waterproof layer

S3‧‧‧Retracting one end of the original substrate to form a fold, and the exposed portion of the folded edge is adhered to one of the original substrates

S4‧‧‧The foamed material is heated to foam the foamed material to form a foamed layer

S5‧‧‧ made a container with insulated surface

Claims (9)

The invention relates to a method for manufacturing a container with an insulated surface layer, comprising the steps of: (1) preparing a raw substrate made of paper, the original substrate having a first surface and a second surface opposite to each other, and coating a first surface on the first surface a coating layer selected from the group consisting of polypropylene and polyethylene terephthalate, and coated on the second side with a waterproof layer, the waterproof layer is composed of polyethylene; 2) coating a foaming material on the waterproof layer to cover at least a portion of the waterproof layer, wherein the foaming material and the material of the waterproof layer are different from each other; (3) one end of the original substrate is folded and pasted Forming a predetermined length of the folded edge, the first position of the original substrate and the folded edge are close to each other, and the exposed portion of the folded edge is adhered to one another at a position of the first position, wherein the exposed portion of the folded edge is The adhesive portion is one of the coating layer or the waterproof layer, and the concavely adhered portion of the flange is the laminating layer or the other of the waterproof layer; (4) heating the foaming material to make the The foamed material is foamed to form a foamed layer, and at least part of the waterproof layer is also subjected to heat generation ; (V) a surface layer made of a heat-insulating container, wherein the lamination layer facing the container, the waterproof layer and the foamed layer toward the outer container. The method for manufacturing a container with an insulated surface layer according to claim 1, wherein the coating layer is coated, the waterproof layer and the original material of the foamed material have a first end and a second end. The first position is located at the first end, and the folded edge is located at the second end, and the first end and the second end are close to each other and rolled up into a roll shape. The method for preparing a container having an insulated surface layer according to claim 1, wherein in the step (2), the hair is The foaming material is obtained by stirring and mixing a liquid binder and a heat-resistant expanded particle powder, and the heat-resistant expanded particle powder is formed by coating a low-boiling solvent in a thermoplastic polymer. A method of producing a container having an insulated surface layer according to claim 1, wherein a pigment is added to the foamed material. The method for manufacturing a container with an insulated surface layer according to claim 1, wherein in the step (3), the exposed portion of the folded edge and the adhesive portion are both the laminating layer, and the concave and concave portion of the folded edge is the portion Waterproof layer. A method of manufacturing a container having an insulated surface layer according to claim 5, wherein the portion of the folded portion that is concavely pasted is not coated with the foamed material. The invention relates to a method for manufacturing a container with an insulated surface layer, comprising the steps of: (1) preparing a raw substrate made of paper, the original substrate having a first surface and a second surface opposite to each other, and coating a first surface on the first surface a coating layer selected from the group consisting of polypropylene and polyethylene terephthalate, and coated on the second side with a waterproof layer, the waterproof layer is composed of polyethylene; 2) coating a foaming material on the waterproof layer to cover at least a portion of the waterproof layer, wherein the foaming material and the material of the waterproof layer are different from each other; (3) the first side of the raw paper is facing inward, The second side is rolled outward, and a region of the original paper material having a predetermined area is a waterproof layer not covered by the foamed material, and a paper sheet is sandwiched between the waterproof layer region covered by the unfoamed material and the Between the first side of the other end of the original paper, the two ends of the original paper are adhered to each other by the paper; (4) heating the foam to foam the foam to form a foam layer, and At least part of the waterproof layer is also thermally foamed; (5) A container having an insulated surface layer, wherein the coating layer faces the container, the waterproof layer and the foam layer facing the outside of the container. The method of manufacturing a container having an insulated surface layer according to claim 7, wherein the paper sheet is coated with polyethylene on one side of the waterproof layer. The method of claim 7, wherein the paper sheet is coated on one side of the coating layer with a material selected from the group consisting of polypropylene and polyethylene terephthalate.