CN217197289U - Composite film suitable for emulsion pesticide - Google Patents

Abstract

The utility model relates to a complex film suitable for milk oil class pesticide, include from outer to interior sequence range upon range of printing layer that sets up, hinder wet layer, hinder oxygen layer and polyethylene layer, hinder wet layer and include polyester film layer and the alumina coating who is located polyester film layer side. The utility model discloses possess high barrier property, and also more environmental protection on the waste film is handled.

Description

Composite film suitable for emulsifiable pesticides

Technical Field

The utility model belongs to the technical field of the complex film, concretely relates to complex film suitable for butter class pesticide.

Background

The traditional missible oil pesticide packaging material usually contains an aluminum foil structure, mainly plays a role in blocking outside water vapor and preventing organic solvents in the package from volatilizing outwards, and needs a high-blocking function. But the metal composite material has great difficulty in waste film treatment and serious environmental pollution; in addition, the components of the prior butter-type pesticides are continuously improved, and the prior package has excessive functions.

Disclosure of Invention

An object of the utility model is to provide a complex film suitable for butter class pesticide, the utility model discloses possess high separation nature, and also more environmental protection on the waste film is handled.

For solving the technical problem, the technical proposal of the utility model is that: a composite film suitable for emulsion pesticides comprises a printing layer, a moisture-resistant layer, an oxygen-resistant layer and a polyethylene layer which are sequentially stacked from outside to inside, wherein the moisture-resistant layer comprises a polyester film layer and an aluminum oxide coating layer positioned on the outer side of the polyester film layer.

Preferably, the printing layer is a general-purpose polyester film with the thickness of 12-18 microns. The surface dyne value is larger than 52, and the surface dyne is mainly used for bearing printing ink, embodying printing patterns and needing high permeability.

Preferably, the oxygen barrier layer is a mixture of polyvinyl alcohol substances and nano-scale silicon dioxide, and the coating has a glue application quantity of 2-3 g/square meter. The control hinders oxygen and is less than 1, and it is not good to glue volume low barrier effect, and it is extravagant that the glue volume leads to much, appears peeling scheduling problem moreover easily and influences barrier property, and this sets up the comprehensive consideration cost, guarantees good barrier effect.

Preferably, the polyethylene layer is a polyethylene film having a thickness of 70 to 90 μm. Controlling the heat-seal strength to be more than 50N/15mm, the dyne value of the composite layer to be more than 40 and the dyne value of the heat-seal surface to be less than 34; the adhesive is used for ensuring the connection strength between layers, and the dyne value of the composite surface ensures the tight combination between the composite surface and the adhesive layer.

Preferably, the polyethylene layer comprises a composite layer, a framework layer and a heat sealing layer which are sequentially stacked from outside to inside, the specific gravity of the linear low-density polyethylene of the framework layer, the heat sealing layer and the composite layer is sequentially increased, the composite layer is close to the oxygen barrier layer, and the heat sealing layer is close to the built-in object. The composite layer is composed of 40% -50% of low-density polyethylene and 40% -50% of linear low-density polyethylene, the framework layer is composed of 20% -30% of low-density polyethylene, 20% -30% of linear low-density polyethylene and 30% -40% of metallocene linear low-density polyethylene, the heat sealing layer is composed of 30% -40% of linear low-density polyethylene, 60% -70% of metallocene linear low-density polyethylene and 5% of auxiliary additives, and the auxiliary additives are an opening agent and a slipping agent. The composite layer mainly contacts with an adhesive to ensure the composite strength with other materials, the framework layer mainly plays a role in supporting the membrane and belongs to a framework, and the heat sealing layer mainly provides heat sealing performance.

Preferably, an ink layer is provided between the printing layer and the polyester film layer. The ink layer is made of cooking-resistant ink, so that the problem of delamination caused by organic solvent fumigation is solved.

Preferably, an adhesive layer is arranged between the ink layer and the polyester film layer, and an adhesive layer is also arranged between the oxygen barrier layer and the heat sealing layer. The adhesive layer is made of 135 ℃ cooking resistant adhesive, high corrosion resistance is required, the gluing amount is controlled to be 4.5-5.0 g/square meter, the peeling strength of the inner layer is greater than 10N/15mm, and stable connection between layers is guaranteed.

To sum up, compared with the prior art, the utility model has the following advantages:

the polyethylene layer of the utility model is made of high corrosion resistant material, thus avoiding corrosion when contacting with pesticide; the moisture barrier layer is provided with an alumina coating at the side of the polyester film layer, controls the oxygen barrier performance to be less than 3 and the moisture barrier performance to be less than 1, so that a first barrier is formed to achieve the high moisture barrier performance and preliminary oxygen barrier performance, and then an oxygen barrier layer with the oxygen barrier performance less than 1 is further arranged at the inner side to form a second barrier to achieve the high oxygen barrier performance, and the two barriers are matched to ensure that the utility model has high barrier performance in the aspects of oxygen barrier and moisture barrier; in addition, compared with a non-transparent aluminum foil, the aluminum oxide coating is a transparent layer and has lower cost, the composite film containing the aluminum foil cannot be recycled in the recycling process, and the aluminum oxide coating does not influence the recycling of waste products, so that the aluminum oxide coating is more environment-friendly.

Drawings

FIG. 1 is a schematic view of the layer structure of the present invention;

the reference numbers in the figures are:

1. printing layer; 2. a polyester film layer; 3. an oxygen barrier layer; 4. a polyethylene layer; 5. an aluminum oxide coating; 6. an ink layer; 7. an adhesive layer; 8. a moisture barrier layer; 41. compounding layers; 42. a framework layer; 43. and (4) heat sealing the layer.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example (b):

as shown in figure 1, the composite film suitable for the emulsion pesticide comprises a printing layer 1, a moisture barrier layer 8, an oxygen barrier layer 3 and a polyethylene layer 4 which are sequentially stacked from outside to inside, wherein the moisture barrier layer 8 comprises a polyester film layer 2 and an aluminum oxide coating 5 positioned on the outer side of the polyester film layer 2. The polyethylene layer 4 is made of a high-corrosion-resistance material, so that the polyethylene layer is prevented from being corroded when contacting pesticides; the moisture barrier layer 8 is characterized in that the aluminum oxide coating 5 is arranged on the side edge of the polyester film layer 2, the oxygen barrier performance is controlled to be less than 3, the moisture barrier performance is controlled to be less than 1, so that a first barrier is formed to achieve high moisture barrier performance and preliminary oxygen barrier performance, the oxygen barrier layer 3 with the oxygen barrier performance of less than 1 is further arranged on the inner side to form a second barrier to achieve high oxygen barrier performance, and the two barriers are matched to ensure that the utility model has high barrier performance in the aspects of oxygen barrier and moisture barrier; in addition, compared with a non-transparent aluminum foil, the aluminum oxide coating 5 is a transparent layer and has lower cost, the composite film containing the aluminum foil cannot be recycled in the recycling process, and the aluminum oxide coating 5 does not influence the recycling of waste products, so that the aluminum oxide coating is more environment-friendly.

The printing layer 1 is a general polyester film with the thickness of 12-18 microns. The surface dyne value is larger than 52, and the surface dyne is mainly used for bearing printing ink, embodying printing patterns and needing high permeability.

The oxygen barrier layer 3 is a mixture of polyvinyl alcohol substances and nano-scale silicon dioxide, and the coating has the gluing amount of 2-3 g per square meter. The control oxygen blocking is less than 1, the low-blocking effect of the sizing amount is poor, the sizing amount is large, waste is caused, the blocking performance is affected by the problems of peeling and the like, the cost is comprehensively considered by the setting, and the good blocking effect is ensured.

The polyethylene layer 4 is a polyethylene film having a thickness of 70 to 90 μm. Controlling the heat-seal strength to be more than 50N/15mm, the dyne value of the composite layer to be more than 40 and the dyne value of the heat-seal surface to be less than 34; the adhesive is used for ensuring the connection strength between layers, and the dyne value of the composite surface ensures the tight combination between the composite surface and the adhesive layer 7.

The polyethylene layer 4 comprises a composite layer 41, a framework layer 42 and a heat sealing layer 43 which are sequentially stacked from outside to inside, the specific gravity of the framework layer 42, the heat sealing layer 43 and the linear low-density polyethylene of the composite layer 41 is sequentially increased, the composite layer 41 is close to the oxygen barrier layer 3, and the heat sealing layer 43 is close to the built-in object. The composite layer 41 consists of 50% of low-density polyethylene and 50% of linear low-density polyethylene, the framework layer 42 consists of 30% of low-density polyethylene, 30% of linear low-density polyethylene and 40% of metallocene linear low-density polyethylene, and the heat sealing layer 43 consists of 40% of linear low-density polyethylene, 55% of metallocene linear low-density polyethylene and 5% of auxiliary additives, wherein the auxiliary additives are an opening agent and a slipping agent. The composite layer 41 mainly contacts with an adhesive to ensure the composite strength with other materials, the framework layer 42 mainly plays a role in supporting the membrane and belongs to a framework, and the heat sealing layer 43 mainly provides heat sealing performance.

An ink layer 6 is arranged between the printing layer 1 and the polyester film layer 2. The ink layer 6 adopts cooking-resistant ink to prevent the delamination problem caused by organic solvent fumigation.

An adhesive layer 7 is arranged between the ink layer 6 and the polyester film layer 2, and an adhesive layer 7 is also arranged between the oxygen barrier layer 3 and the polyethylene layer 4. The adhesive layer 7 is a 135 ℃ cooking resistant adhesive, and simultaneously requires high corrosion resistance, the gluing amount is controlled to be 4.5-5.0 g/square meter, the peel strength of the inner layer is greater than 10N/15mm, and the stable connection between layers is ensured.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (7)

1. The composite film suitable for the dairy oil pesticides is characterized by comprising a printing layer (1), a moisture barrier layer (8), an oxygen barrier layer (3) and a polyethylene layer (4) which are sequentially stacked from outside to inside, wherein the moisture barrier layer (8) comprises a polyester film layer (2) and an aluminum oxide coating (5) positioned on the outer side of the polyester film layer (2).

2. The composite film for the milk oil type pesticide as claimed in claim 1, wherein the printing layer (1) is a general purpose type polyester film with a thickness of 12-18 microns.

3. The composite film suitable for the cream pesticide as claimed in claim 1, wherein the coating of the oxygen barrier layer (3) has a coating gluing amount of 2-3 g per square meter.

4. The composite film for a pesticide of the milk type as claimed in claim 1, wherein the polyethylene layer (4) is a polyethylene film having a thickness of 70 to 90 μm.

5. The composite film suitable for the pesticide oils as claimed in claim 4, wherein the polyethylene layer (4) comprises a composite layer (41), a framework layer (42) and a heat-sealing layer (43) which are sequentially laminated from outside to inside, the linear low density polyethylene specific gravity of the framework layer (42), the heat-sealing layer (43) and the composite layer (41) is sequentially increased, the composite layer (41) is close to the oxygen barrier layer (3), and the heat-sealing layer (43) is close to the built-in object.

6. Composite film suitable for dairy based pesticides according to claim 1, wherein an ink layer (6) is provided between the printed layer (1) and the polyester film layer (2).

7. A composite film suitable for milk pesticide according to claim 6, wherein an adhesive layer (7) is provided between the ink layer (6) and the polyester film layer (2), and an adhesive layer (7) is also provided between the oxygen barrier layer (3) and the polyethylene layer (4).

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