Alcohol cotton piece packaging film

Abstract

The utility model belongs to the field of packaging films, and particularly relates to an alcohol cotton piece packaging film which comprises a PET polyester base film layer, an ink layer, a polyurethane connecting layer, a low-density polyethylene bonding layer, an aluminum foil blocking layer, an ethylene-acrylic acid copolymer connecting layer and a low-density polyethylene heat sealing layer which are sequentially connected. According to the technical scheme, the aluminum foil serves as the blocking layer, the low-density polyethylene bonding layer and the polyurethane connecting layer are connected with the PET polyester base film layer behind the printing ink layer, the ethylene-acrylic acid copolymer connecting layer is connected with the low-density polyethylene heat sealing layer, and delamination is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of packaging films, and in particular relates to an alcohol cotton sheet packaging film. Background Art

[0002] Alcohol cleaning cotton pads have the functions of cleaning, decontamination and fingerprint removal. Because the cotton pads contain alcohol, the packaging film needs to have high barrier properties to prevent alcohol volatilization. The ordinary alcohol cotton pad packaging film on the market currently has a PET film as the base film layer on the outermost layer, and an aluminum-plated film in the middle barrier layer. The specific structure includes a PET polyester base film layer, an ink layer, a polyurethane connecting layer, an aluminum foil polyester barrier layer, a polyurethane connecting layer and a sarin resin heat sealing layer connected in sequence.

[0003] Because alcohol is corrosive, wet wipes packaged in the original packaging film are prone to delamination of aluminized polyester and aluminum transfer. In addition, sarin resin (an ionic polymer based on ethylene-methacrylic acid) is more expensive and its processability is not as good as LDPE resin. Utility Model Content

[0004] The utility model aims to overcome the defects in the prior art and provide an alcohol cotton pad packaging film.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] The invention discloses an alcohol cotton sheet packaging film, comprising a PET polyester base film layer, an ink layer, a polyurethane connecting layer, a low-density polyethylene adhesive layer, an aluminum foil barrier layer, an ethylene-acrylic acid copolymer connecting layer, and a low-density polyethylene heat-sealing layer which are sequentially connected.

[0007] The thickness of the PET polyester base film layer is 10-14 microns.

[0008] The amount of the polyurethane primer in the polyurethane connecting layer is 0.15-0.3 g / m 2 .

[0009] The material of the low-density polyethylene bonding layer is a mixed resin of high-pressure low-density polyethylene LDPE and EMAA; the mass content of EMAA is 20-25%; and the thickness of the low-density polyethylene bonding layer is 18-20 microns.

[0010] The thickness of the aluminum foil barrier layer is 6-8 microns.

[0011] The thickness of the ethylene-acrylic acid copolymer tie layer is 13-15 microns.

[0012] The material of the low-density polyethylene heat-sealing layer is a mixed resin of high-pressure low-density polyethylene LDPE and metallocene polyethylene, and the mass content of the metallocene polyethylene is 30-50%; the thickness of the low-density polyethylene heat-sealing layer is 13-15 microns.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The technical solution of the present application uses aluminum foil as a barrier layer, and connects the PET polyester base film layer after the printing ink layer with a low-density polyethylene adhesive layer and a polyurethane connecting layer, and connects the low-density polyethylene heat-sealing layer with an ethylene-acrylic acid copolymer connecting layer to avoid delamination. At the same time, the most preferred method is to use a high-pressure low-density polyethylene LDPE and a metallocene polyethylene mixed resin as a low-density polyethylene heat-sealing layer instead of a sarling resin as a heat-sealing layer, which is easy to process and reduces the resin cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the alcohol cotton pad packaging film of the utility model; DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and the best embodiment.

[0017] It should be noted that the materials used in the packaging film of the present application are conventional materials well known to those skilled in the art, and the components are not specifically limited.

[0018] Figure 1 An alcohol cotton sheet packaging film is shown, comprising a PET polyester base film layer 1, an ink layer 2, a polyurethane connecting layer 3, a low-density polyethylene adhesive layer 4, an aluminum foil barrier layer 6, an ethylene-acrylic acid copolymer connecting layer 6, and a low-density polyethylene heat-sealing layer 7 connected in sequence.

[0019] The thickness of the PET polyester base film layer is 10-14 microns, specifically 10 microns, 12 microns, and 14 microns. In this application, 12 microns is used as a preferred example for illustration.

[0020] The amount of the polyurethane primer in the polyurethane connecting layer is 0.15-0.3 g / m 2 , specifically 0.15g / m 2 , 0.2g / m 2 , 0.3g / m 2 In this application, 0.2g / m 2 The polyurethane primer is described as a preferred example. The polyurethane primer is a two-component polyurethane primer.

[0021] The material of the low-density polyethylene bonding layer is a mixed resin of high-pressure low-density polyethylene LDPE and EMAA; the mass content of EMAA is 20-25%, specifically 20%, 22%, 25%, with 20% being described as a preferred example; the thickness of the low-density polyethylene bonding layer is 18-20 microns, specifically 18 microns, 19 microns, 20 microns, and 18 microns is described as a preferred example in this application.

[0022] The thickness of the aluminum foil barrier layer is 6-8 microns, specifically 6 microns, 7 microns, and 8 microns. In this application, 7 microns is used as a preferred example for description.

[0023] The thickness of the ethylene-acrylic acid copolymer connecting layer is 13-15 microns, specifically 13 microns, 14 microns, and 15 microns. In this application, 15 microns is used as a preferred example for description.

[0024] The material of the low-density polyethylene heat-sealing layer is a mixed resin of high-pressure low-density polyethylene LDPE and metallocene polyethylene, and the mass content of the metallocene polyethylene is 30-50%, specifically 30%, 40%, and 50%, with 40% being described as a preferred example; the thickness of the low-density polyethylene heat-sealing layer is 13-15 microns, specifically 13 microns, 14 microns, and 15 microns, and 14 microns is described as a preferred example in this application.

[0025] The implementation process of the technical solution adopted by the utility model is as follows: PET polyester film is used as the base film layer for printing ink layer, the printing method adopts the gravure printing method, the ink uses benzene-free and ketone-free polyester ink, and after printing, the PET printed film is compounded with the aluminum foil barrier layer through a laminating process, and during laminating and compounding, the PET polyester base film layer is first coated with a two-component polyurethane primer, and after being dried in a laminating machine oven, a polyurethane connecting layer (drying temperature 90°C-100°C) is formed, and a high-pressure polyethylene LDPE and EMAA acid copolymer mixed resin is extruded at high temperature on its surface as a low-density polyethylene bonding layer, and after extrusion, it is immediately laminated with the matte surface of the aluminum foil barrier layer, and after laminating, it is rolled up and sent to a curing room for aging treatment.

[0026] After aging, the semi-finished product is coated. EAA resin is coated on the bright surface of the aluminum foil barrier layer to obtain an ethylene-acrylic acid copolymer connecting layer. LDPE and metallocene polyethylene mixed resin are coated on the EAA resin to obtain a low-density polyethylene heat-sealing layer. The coating adopts a co-extrusion process of a twin-screw coating machine. The EAA resin and LDPE and metallocene polyethylene mixed resin are extruded and coated from the T-DIE at the same time through the co-extrusion plug-in and the extrusion die head. After being rolled off the machine, they are cut into rolls according to the size and number of meters required by the customer. The finished products after cutting are sent to the customer for packaging and use.

[0027] The technical solution of the present application uses aluminum foil as a barrier layer, and the PET polyester base film layer after the printed ink layer is connected by a low-density polyethylene adhesive layer and a polyurethane connecting layer, and the ethylene-acrylic acid copolymer connecting layer is connected to the low-density polyethylene heat-sealing layer to avoid delamination.

[0028] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. An alcohol cotton pad packaging film, characterized in that: The invention comprises a PET polyester base film layer, an ink layer, a polyurethane connecting layer, a low-density polyethylene adhesive layer, an aluminum foil barrier layer, an ethylene-acrylic acid copolymer connecting layer, and a low-density polyethylene heat-sealing layer which are connected in sequence.

2. The alcohol cotton pad packaging film according to claim 1, characterized in that: The thickness of the PET polyester base film layer is 10-14 microns.

3. The alcohol cotton pad packaging film according to claim 1, characterized in that: The amount of the polyurethane primer in the polyurethane connecting layer is 0.15-0.3 g / m 2 .

4. The alcohol cotton pad packaging film according to claim 1, characterized in that: The thickness of the low density polyethylene adhesive layer is 18-20 microns.

5. The alcohol cotton pad packaging film according to claim 1, characterized in that: The thickness of the aluminum foil barrier layer is 6-8 microns.

6. The alcohol cotton pad packaging film according to claim 1, characterized in that: The thickness of the ethylene-acrylic acid copolymer tie layer is 13-15 microns.

7. The alcohol cotton pad packaging film according to claim 1, characterized in that: The thickness of the low-density polyethylene heat-sealing layer is 13-15 microns.

Images