Paper-plastic composite film for yeast packaging

Abstract

The utility model relates to a paper-plastic composite film, in particular to a paper-plastic composite film for yeast packaging. The fresh yeast packaging film aims to solve the problems that in the prior art, a fresh yeast packaging film is poor in water resistance and oxygen resistance and prone to being damaged in the transportation process. The aluminum-plated base paper layer is clamped between the co-extrusion film layer and the linear low-density polyethylene layer, and the aluminum-plated base paper layer, the linear low-density polyethylene layer, the high-density polyethylene layer and the heat-sealing layer are connected in a curtain coating compounding manner, so that the aluminum-plated base paper layer is not contacted with the outside, and the problem that the packaging film is easy to damage due to low strength of base paper is solved. The EVOH layer in the co-extrusion film layer can enhance the water blocking effect, the high-barrier nylon layer can improve the water blocking and oxygen blocking performance, the bubble polyethylene layer can play a buffering role, and the packaging film is prevented from being damaged due to collision in the transportation process of bagged yeast. The utility model belongs to the technical field of food flexible packaging materials.

Description

Technical Field

[0001] The utility model relates to a paper-plastic composite film, in particular to a paper-plastic composite film for yeast packaging, belonging to the technical field of food flexible packaging materials. Background Art

[0002] At present, most of the packaging films for fresh yeast on the market adopt a composite structure of varnish layer-base paper-polyethylene film. In actual use, due to the poor barrier property of the base paper itself, the water resistance and oxygen resistance of the packaging film are not good; secondly, due to the low strength and poor wear resistance of the base paper, and the base paper is on the surface layer of the packaging film, the base paper of the bagged yeast often breaks during transportation.

[0003] In summary, how to propose a brand-new yeast packaging film for the above technical problems has become an urgent problem to be solved by those skilled in the art at present. Summary of the Utility Model

[0004] Aiming at the above deficiencies of the prior art, the utility model provides a paper-plastic composite film for yeast packaging.

[0005] The technical solution of the utility model is: a paper-plastic composite film for yeast packaging, including a co-extruded film layer, an aluminized base paper layer, a linear low-density polyethylene layer, a high-density polyethylene layer and a heat-sealing layer.

[0006] The structure of the co-extruded film layer is a first polyamide layer, a first adhesive resin layer, a second polyamide layer, a second adhesive resin layer, an EVOH layer, a high-barrier nylon layer, a third adhesive resin layer, a bubble polyethylene layer and a third polyamide layer arranged in sequence from outside to inside.

[0007] The aluminized base paper layer, the linear low-density polyethylene layer, the high-density polyethylene layer and the heat-sealing layer are connected by the method of cast coextrusion.

[0008] An ink layer is printed on one side of the aluminized base paper layer, and the ink layer is bonded to the third polyamide layer through an adhesive.

[0009] Further, a matte varnish layer is coated on the outer side of the first polyamide layer.

[0010] Further, the ink layer is an ink layer using waterborne polyurethane.

[0011] Further, the heat-sealing layer is a functional film.

[0012] Further, the high-barrier nylon layer is a nylon layer coated with silicon dioxide.

[0013] Compared with the prior art, the utility model has the following effects:

[0014] The aluminized base paper layer 200 of the present utility model is sandwiched between the co-extruded film layer 100 and the linear low-density polyethylene layer 300. The aluminized base paper layer 200, the linear low-density polyethylene layer 300, the high-density polyethylene layer 400, and the heat-sealing layer 500 are connected by cast coextrusion. Therefore, the aluminized base paper layer 200 does not come into contact with the outside world, solving the problem that the packaging film is easily damaged due to the low strength of the base paper.

[0015] The EVOH layer 105 in the co-extruded film layer 100 can enhance the water barrier effect, the high-barrier nylon layer 106 can improve the water and oxygen barrier properties, and the bubble polyethylene layer 108 can play a buffering role to prevent the packaging film of the bagged yeast from being damaged due to collision during transportation. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the present utility model.

[0017] In the figure: 110, matte oil layer; 101, first polyamide layer; 102, first adhesive resin layer; 103, second polyamide layer; 104, second adhesive resin layer; 105, EVOH layer; 106, high-barrier nylon layer; 107, third adhesive resin layer; 108, bubble polyethylene layer; 109, third polyamide layer; 210, ink layer; 200, aluminized base paper layer; 300, linear low-density polyethylene layer; 400, high-density polyethylene layer; 500, heat-sealing layer. Detailed Embodiments

[0018] To make the utility model purpose, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0019] Detailed Embodiment 1: In combination with Figure 1 This embodiment is described. A paper-plastic composite film for yeast packaging in this embodiment includes a co-extruded film layer 100, an aluminized base paper layer 200, a linear low-density polyethylene layer 300, a high-density polyethylene layer 400, and a heat-sealing layer 500.

[0020] The structure of the co-extruded film layer 100 is sequentially arranged from the outside to the inside as a first polyamide layer 101, a first adhesive resin layer 102, a second polyamide layer 103, a second adhesive resin layer 104, an EVOH (ethylene-vinyl alcohol copolymer) layer 105, a high-barrier nylon layer 106, a third adhesive resin layer 107, a bubble polyethylene layer 108, and a third polyamide layer 109.

[0021] The aluminized base paper layer 200, the linear low-density polyethylene layer 300, the high-density polyethylene layer 400, and the heat-sealing layer 500 are connected by cast coextrusion.

[0022] One side of the aluminized base paper layer 200 is printed with an ink layer 210, and the ink layer 210 is adhered to the third polyamide layer 109 through an adhesive.

[0023] Specific Embodiment 2: In combination with Figure 1 To illustrate this embodiment, in this embodiment, a matte oil layer 110 is coated on the outer side of the first polyamide layer 101. With such a setting, on the one hand, it can enhance the barrier performance of the present invention, and on the other hand, it can also produce a matte effect and increase the aesthetics.

[0024] The other components and connection relationships are the same as those in Specific Embodiment 1.

[0025] Specific Embodiment 3: In combination with Figure 1 To illustrate this embodiment, in this embodiment, the ink layer 210 is an ink layer using waterborne polyurethane. With such a setting, on the one hand, it is convenient to print the ink layer 210 on the aluminized base paper layer 200 through a printing machine, and on the other hand, it is safe and environmentally friendly.

[0026] The other components and connection relationships are the same as those in Specific Embodiment 1 or 2.

[0027] Specific Embodiment 4: In combination with Figure 1 To illustrate this embodiment, in this embodiment, the heat-sealing layer 500 is a functional film. Further, it is a film layer prepared by mixing polyethylene, a slip agent, an antiblocking agent, and a white masterbatch. Preferably, the weight percentage of the slip agent is 2%, the weight percentage of the antiblocking agent is 2%, and the weight percentage of the white masterbatch is 2%.

[0028] The other components and connection relationships are the same as those in Specific Embodiments 1, 2, or 3.

[0029] Specific Embodiment 5: In combination with Figure 1 To illustrate this embodiment, in this embodiment, the high-barrier nylon layer 106 is a nylon layer coated with silicon dioxide. With such a setting, the water-blocking and oxygen-blocking performance of the present invention is enhanced.

[0030] The other components and connection relationships are the same as those in Specific Embodiments 1, 2, 3, or 4.

[0031] Working Principle

[0032] The first polyamide layer 101, the first adhesive resin layer 102, the second polyamide layer 103, the second adhesive resin layer 104, the EVOH layer 105, the high-barrier nylon layer 106, the third adhesive resin layer 107, the bubble polyethylene layer 108, and the third polyamide layer 109 are co-extruded and then laminated into a co-extruded film layer 100.

[0033] The EVOH layer 105 can enhance the water-blocking effect of the present utility model, the high-barrier nylon layer 106 can enhance the water-blocking and oxygen-blocking properties of the present utility model, and the bubble polyethylene layer 108 can play a buffering role to avoid damage caused by collision.

[0034] The aluminized base paper layer 200, the linear low-density polyethylene layer 300, the high-density polyethylene layer 400, and the heat-sealing layer 500 are connected by the method of cast coextrusion.

[0035] An ink layer 210 is printed on one side of the aluminized base paper layer 200, and the ink layer 210 is bonded to the third polyamide layer 109 through an adhesive. After the adhesive is cured, the composite film of the present utility model is obtained.

[0036] After the composite film is wound up, the aluminized base paper layer 200 is sandwiched between the coextruded film layer 100 and the linear low-density polyethylene layer 300 and does not contact the outside world, solving the problem of easy breakage due to the low strength of the base paper.

[0037] The present utility model has been disclosed in the above preferred embodiments. However, it is not intended to limit the present utility model. Any person skilled in the art, without departing from the content of the technical solution of the present utility model, any simple modification, equivalent change, and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A paper-plastic composite film for yeast packaging, characterized in that: It includes a co-extruded film layer (100), an aluminized base paper layer (200), a linear low-density polyethylene layer (300), a high-density polyethylene layer (400) and a heat-sealing layer (500); The structure of the co-extruded film layer (100) is a first polyamide layer (101), a first adhesive resin layer (102), a second polyamide layer (103), a second adhesive resin layer (104), an EVOH layer (105), a high-barrier nylon layer (106), a third adhesive resin layer (107), a bubble polyethylene layer (108) and a third polyamide layer (109) arranged in sequence from outside to inside; The aluminized base paper layer (200), the linear low-density polyethylene layer (300), the high-density polyethylene layer (400) and the heat-sealing layer (500) are connected by a cast coextrusion method; An ink layer (210) is printed on one side of the aluminized base paper layer (200), and the ink layer (210) is bonded to the third polyamide layer (109) through an adhesive.

2. The plastic-paper composite film for yeast packaging according to claim 1, wherein: A matte oil layer (110) is coated on the outer side of the first polyamide layer (101).

3. A paper-plastic composite film for yeast packaging according to claim 2, characterized in that: The ink layer (210) is an ink layer using water-based polyurethane.

4. A paper-plastic composite film for yeast packaging according to claim 3, characterized in that: The heat-sealing layer (500) is a functional film.

5. The plastic - paper composite film for yeast packaging according to claim 4, wherein: The high-barrier nylon layer (106) is a nylon layer plated with silicon dioxide.

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