CN217729921U

CN217729921U - Composite forming sheet

Info

Publication number: CN217729921U
Application number: CN202220610813.2U
Authority: CN
Inventors: 张志飞; 张俭信
Original assignee: Dongguan Wonderful Packaging Co Ltd
Current assignee: Dongguan Wonderful Packaging Co Ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-11-04
Anticipated expiration: 2032-03-18

Abstract

The utility model relates to a composite forming sheet, including surface course, middle supporting layer, barrier layer and with the two-layer adhesive linkage that each layer is compound together, the both ends face of middle supporting layer has printed the pattern layer respectively, the pattern layer includes first pattern layer and second pattern layer, two-layer adhesive linkage includes first adhesive linkage and second adhesive linkage, first pattern layer passes through first adhesive linkage with the surface course is connected, the second pattern layer passes through the second adhesive linkage with the barrier layer is connected.

Description

Composite forming sheet

Technical Field

The utility model relates to a sheet material technical field especially relates to a composite forming sheet.

Background

The blow/suction molding process softens the thermoplastic sheet material and remoldes the softened thermoplastic sheet material into products with different shapes by performing a vacuum air suction mode or a blowing mode in the set mould, and becomes a main mode for molding the thermoplastic sheet material due to the advantages of low pressure resistance requirement on the mould, high product molding speed, simple operation and the like. With the wide application of PE/PP/PS/PET/PA and other thermoplastic materials which can be used for food contact, the special-shaped molding advantage can be realized by combining blow molding/plastic molding, and the thermoplastic material is widely used for packaging or containers of paste or liquid products such as food, medicines and the like. Therefore, the sheet material applied to the blow/suction molding process not only needs to meet the mechanical and thermal performance requirements of the surface layer heat resistance, the sheet material formability, the heat sealability and the like of the sheet material in the molding process, but also needs to meet the printability requirements of various color patterns. In order to meet various performance requirements such as mechanical property, thermal property, chemical property and the like required by a blow/suction molding process, the technical scheme in the prior art is to form a composite sheet by adopting a composite process on materials with different properties.

The sheet material can be prepared into a tray for containing food by adopting a blow/suction molding process, the material for preparing the sheet material comprises noncrystallized polyethylene terephthalate (APET) and polypropylene (PP), and in order to enable the tray prepared by the sheet material to have metal luster and improve texture, the prior technical scheme is that color master batches are added into the APET and/or the PP in the process of preparing the sheet material so as to extrude the sheet material with metal luster, but the prior technical scheme has the technical problems that: 1. the addition of the color master batch can lead to long time of an extrusion sheet punching machine, high production cost and low efficiency; 2. the problem of monotonous color exists in the coloring of the sheet by adding the color master batch, and the sheet can only produce a tray with single color and no pictures and texts; 3. the tray made of the sheet material has weak metal luster and is not vivid compared with the tray made of metal materials.

SUMMERY OF THE UTILITY MODEL

To the technical problem who exists among the prior art, the utility model provides a composite forming sheet, the tray that uses this composite forming sheet preparation has lifelike metallic luster.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a composite forming sheet material comprises a surface layer, a middle supporting layer, a barrier layer and two bonding layers for compounding the layers. Pattern layers are respectively printed on two end faces of the middle supporting layer and comprise a first pattern layer and a second pattern layer. The two layers of bonding layers comprise a first bonding layer and a second bonding layer, the first pattern layer is connected with the surface layer through the first bonding layer, and the second pattern layer is connected with the barrier layer through the second bonding layer.

The surface layer, the middle supporting layer and the barrier layer of the composite forming sheet are compounded in a dry compounding, extrusion compounding or thermal laminating mode, and the composite forming sheet is made into a tray through a blow/suction molding process.

Through the technical scheme, the pattern layers are respectively printed on the two end faces of the middle supporting layer, so that colors and/or patterns are given to the composite forming sheet.

In one embodiment, the pattern layers are formed by printing ink on two end faces of the middle support layer, wherein the ink is a mixture of transparent yellow ink, original red ink, varnish and a solvent, the pattern layers with different colors are obtained by adjusting the mass ratio of the transparent yellow ink to the original red ink, and specifically, the mass ratio of the transparent yellow ink to the original red ink is in a range of 4-100:1, the color of the pattern layer is more biased toward "golden yellow" as the proportion of the transparent yellow ink is larger, and the color of the pattern layer is more biased toward "gold red" as the proportion of the raw red ink is larger, and any golden color in excess from "golden yellow" to "gold red" can be obtained by adjusting the mass ratio of the transparent yellow ink and the raw red ink.

The first pattern layer is connected with the surface layer through the first bonding layer, the second pattern layer is connected with the barrier layer through the second bonding layer, and the tray prepared from the composite forming sheet has vivid metal luster through the covering of the surface layer on the first pattern layer and the covering of the barrier layer on the second pattern layer.

Wherein, because the composite forming sheet is prepared into the tray by the blow/suction molding process, the mechanical and thermal properties of the composite forming sheet and the use scene limitation of the tray are combined, the surface layer is configured as follows: a polyethylene film (PE), the middle support layer configured to: an aluminized polypropylene film (VMCPP), the barrier layer configured to: amorphous polyethylene terephthalate film (APET) or polypropylene film (PP).

In the composite forming sheet, the thickness range of the surface layer is 20-150 μm, the surface layer protects the first pattern layer in a physical isolation mode, and simultaneously the surface layer needs to meet the requirements of the composite forming sheet on water resistance and oil resistance and the heat resistance of the surface layer in the processing process; the thickness range of the middle supporting layer is 15-70 μm, and the middle supporting layer is used for meeting the requirements of mechanical properties required by composite formed sheets in a material forming supporting structure in the blowing/plastic sucking forming process; the thickness range of the barrier layer is 100-1500 mu m, the barrier layer protects the second pattern layer in a physical isolation mode, and meanwhile, the barrier layer needs to meet the heat sealing performance and the barrier performance required by the composite forming sheet.

In one embodiment, the thickness of the first adhesive layer and the second adhesive layer of the composite molding sheet is in a range of 0.001mm to 0.01mm, and the material of the adhesive layers is polyurethane or acrylic system.

To sum up, the utility model discloses following beneficial effect has:

1. the utility model provides a composite forming sheet, through printing the pattern layer respectively at the both ends face of middle supporting layer, given this composite forming sheet color and/or pattern, therefore the tray that makes through this composite forming sheet has better outward appearance and more lifelike metallic luster;

2. the composite molding sheet is prepared without adding color master batch, so that the production cost is greatly reduced, and the production efficiency is greatly improved.

Drawings

The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation to the present invention.

Fig. 1 is a schematic view of a layered structure of a composite formed sheet provided in embodiment 1 of the present invention.

Wherein the reference numerals are:

1. a surface layer;

2. a first adhesive layer;

3. a first pattern layer;

4. a middle support layer;

5. a second pattern layer;

6. a second adhesive layer;

7. and a barrier layer.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, or indirectly coupled through intervening agents, both internally and/or in any other manner known to those skilled in the art. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The abbreviations in the utility model are explained as follows:

APET: amorphous polyethylene terephthalate film;

PE: a polyethylene film;

PP: a polypropylene film;

VMCPP: an aluminum-plated polypropylene film.

Examples 1-3 provide a method of making a composite formed sheet comprising the steps of:

s1, printing and producing a first pattern layer and a second pattern layer with exquisite colors on two end faces of a middle supporting layer by using printing ink through gravure printing or flexographic printing equipment;

s2, uniformly coating the adhesive on the lower end face of the surface layer to form a first adhesive layer, wherein the adhesive coating amount is not less than 1.2g/m ² (ii) a Uniformly coating an adhesive on the upper end surface of the barrier layer to form a second adhesive layer, wherein the adhesive coating amount is not less than 1.5g/m ² ；

S3, compounding the middle supporting layer processed in the step S1 and the surface layer processed in the step S2 on a solvent-free compounding machine after facing the barrier layer to obtain a semi-finished product of the compound molding sheet, wherein the compounding pressure is not less than 0.25mpa;

s4, conveying the semi-finished product of the composite formed sheet into a curing chamber, curing for 72 hours at 35 ℃ to obtain the composite formed sheet, and then slitting and rolling.

Example 1

The utility model provides a composite forming sheet, as shown in fig. 1, from last to including surface course 1, first adhesion layer 2, first pattern layer 3, middle supporting layer 4, second pattern layer 5, second adhesion layer 6 and barrier layer 7 down in proper order.

Wherein, the surface layer 1 is PE, and the thickness is 20 μm; the middle supporting layer 4 is VMCPP with the thickness of 15 μm; the barrier layer 7 is APET and has a thickness of 100 μm. The first pattern layer 3 and the second pattern layer 5 are printed on both end faces of the middle support layer 4, respectively. The surface layer 1 and the first pattern layer 3 are combined together through the first adhesive layer 2, the barrier layer 7 and the second pattern layer 5 are combined together through the second adhesive layer 6, and in the embodiment, the first adhesive layer 2 and the second adhesive layer 6 are both polyurethane type solvent-free adhesives.

Example 2

The composite formed sheet of this example is different from example 1 in that:

the thickness of the surface layer is 150 μm;

the thickness of the middle supporting layer is 70 μm;

the barrier layer is PP and the thickness is 1500 mu m.

Example 3

The composite formed sheet of this example is different from example 1 in that:

the thickness of the surface layer is 70 μm;

the thickness of the middle supporting layer is 50 μm;

the thickness of the barrier layer was 800 μm.

The composite shaped sheets provided in examples 1-3 were tested as follows:

gloss: the gloss of the plastic film and the fixed plastic is measured at a 60 degree test angle according to the standard ASTM D2457-13;

formability: the homemade spring gloss machine-double-sided positive pressure blow molding packaging equipment checks the sheet material for forming performance-appearance integrity, delamination and forming broken holes.

The test results are shown in table 1.

TABLE 1

Test items	Example 1	Example 2	Example 3
				Degree of gloss	105	110	112
Formability	ok	ok	ok

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A composite formed sheet characterized by: the adhesive layer comprises a surface layer, a middle supporting layer, a blocking layer and two adhesive layers compounding the surface layer and the middle supporting layer together, wherein pattern layers are printed on two end faces of the middle supporting layer respectively, each pattern layer comprises a first pattern layer and a second pattern layer, the two adhesive layers comprise a first adhesive layer and a second adhesive layer, the first pattern layer is connected with the surface layer through the first adhesive layer, and the second pattern layer is connected with the blocking layer through the second adhesive layer.

2. The composite profiled sheet of claim 1 wherein: the surface layer is a polyethylene film.

3. The composite profiled sheet of claim 2 wherein: the middle supporting layer is an aluminized polypropylene film.

4. The composite profiled sheet material as claimed in claim 3 wherein: the barrier layer is an amorphous polyethylene terephthalate film or a polypropylene film.

5. The composite profiled sheet material as claimed in claim 4 wherein: the thickness of the surface layer ranges from 20 mu m to 150 mu m.

6. The composite profiled sheet of claim 5 wherein: the thickness of the middle support layer ranges from 15 μm to 70 μm.

7. The composite profiled sheet material as claimed in claim 6 wherein: the thickness of the barrier layer ranges from 100 μm to 1500 μm.