Paper effect fruit tea closure lid film

Abstract

The application relates to the technical field of packaging materials, and discloses a fruit tea sealing cover film with a paper effect, which comprises, from inside to outside, a PE film layer, a PVA film layer and a glassine paper layer; the PE film layer comprises the following components in parts by weight: linear low-density polyethylene 50-60 parts, linear high-density polyethylene 10-15 parts, low-density polyethylene 10-15 parts, ethylene-vinyl acetate copolymer 15-18 parts, a modifier 2-5 parts, an antioxidant 2-4 parts, a compatilizer 0.3-0.5 parts, and dihydroxypropyl octadecanoate 0.5-1.5 parts. The technical scheme can solve the problem of poor temperature resistance of the fruit tea sealing cover film in the prior art.

Description

Technical Field

[0001] This invention relates to the field of packaging materials technology, specifically to a paper-effect sealing film for fruit tea. Background Technology

[0002] With the improvement of living standards, people's demand for beverages and drinks is also increasing. Fruit tea, with its sweet and sour taste and various health-promoting nutrients, is particularly popular among consumers. Fruit tea is sold in paper cups, with the cup openings sealed with a sealing film. Therefore, the quality of the sealing film directly affects the appearance and quality of the product, and its temperature resistance is directly related to the quality of the sealing film. Thus, to improve the quality of fruit tea and win over more consumers, the temperature resistance of the sealing film should be improved. Summary of the Invention

[0003] This invention proposes a paper-like sealing film for fruit tea, which solves the problem of poor temperature resistance of fruit tea sealing films in related technologies.

[0004] The technical solution of the present invention is as follows:

[0005] A paper-effect sealing film for fruit tea, comprising, from the inside out, a PE film layer, a PVA film layer, and a glassine paper layer. The PE film layer comprises the following components by weight: 50-60 parts of linear low-density polyethylene, 10-15 parts of linear high-density polyethylene, 10-15 parts of low-density polyethylene, 15-18 parts of ethylene-vinyl acetate copolymer, 2-5 parts of modifier, 2-4 parts of antioxidant, 0.3-0.5 parts of compatibilizer, and 0.5-1.5 parts of dihydroxypropyl octadecanoate.

[0006] As a further technical solution, the compatibilizer is maleic anhydride grafted with POE, with a grafting rate of 1.5-2.5%.

[0007] As a further technical solution, the antioxidant includes one or more of antioxidant 1010, antioxidant 1070, and antioxidant 168.

[0008] As a further technical solution, the modifier is tert-butyl peroxylaurate or dicumyl peroxide.

[0009] As a further technical solution, the mass ratio of tert-butyl peroxylaurate to dicumyl peroxide is 3:2.

[0010] As a further technical solution, the PVA film layer comprises the following components by weight: 90-100 parts of polyvinyl alcohol resin, 8-12 parts of polyethylene wax, 2-5 parts of silicone oil, and 30-40 parts of polyethylene glycol.

[0011] A method for preparing a paper-effect sealing film for fruit tea includes the following steps:

[0012] S1. After melting the PE film material and the PVA film material separately, a composite film is obtained by two-layer blown film extrusion.

[0013] S2. The composite film is subjected to longitudinal stretching and corona treatment to obtain a PE / PVA composite material;

[0014] S3. Attach glassine paper to the PVA layer of the PE / PVA composite material to obtain a sealing film.

[0015] As a further technical solution, in S3, the glassine paper is attached to the PVA layer of the PE / PVA composite material after applying adhesive to the PVA layer of the PE / PVA composite material.

[0016] As a further technical solution, the melting temperature of the PE film material in S1 is 165-185℃, and the melting temperature of the PVA film material is 185-210℃.

[0017] As a further technical solution, the thickness of the sealing cap film is 30-40μm; the thickness of the PE film layer of the sealing cap film is 50-70% of the thickness of the PVA film layer.

[0018] The working principle and beneficial effects of this invention are as follows:

[0019] 1. This invention employs a paper-plastic composite process, achieving a paper-like packaging appearance. The prepared sealing cap film is a PE / PVA / glassine paper composite film, with the outermost layer using glassine paper as the printing layer. The paper printing features bright colors and clear patterns, which enhances the consumer experience, brand communication, and product sales. Furthermore, the outermost glassine paper increases the biodegradable components of the packaging material, contributing to partial biodegradability and environmental friendliness.

[0020] 2. In this invention, the sealing film uses tert-butyl peroxylaurate and dicumyl peroxide as modifiers, which can improve the temperature resistance of the sealing film, improve the aesthetics of the fruit tea after sealing, and thus improve the consumer's consumption experience. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] In the following examples and comparative examples, DH-1101 polyurethane adhesive was purchased from Zibo Dihua Polyurethane Co., Ltd., and glassine paper was purchased from Kunshan Caiyi Paper & Plastic Products Co., Ltd.

[0023] Example 1

[0024] The fruit tea sealing film comprises: a PE film layer, a PVA film layer, and a glassine paper layer; wherein the PE film layer comprises the following components by weight: 50 parts linear low-density polyethylene, 10 parts linear high-density polyethylene, 10 parts low-density polyethylene, 15 parts ethylene-vinyl acetate copolymer, 1.2 parts tert-butyl peroxylaurate, 0.8 parts dicumyl peroxide, 2 parts antioxidant 1010, 0.3 parts maleic anhydride-grafted POE, and 0.5 parts dihydroxypropyl octadecanoate, wherein the grafting rate of maleic anhydride-grafted POE is 2%; the PVA film layer comprises the following components by weight: 90 parts polyvinyl alcohol resin, 8 parts polyethylene wax, 2 parts silicone oil, and 30 parts polyethylene glycol.

[0025] The preparation method of the fruit tea sealing cap film includes the following steps: PE film material and PVA film material are melted and filtered separately in a twin-screw extruder, then fed into a die for co-extrusion blown film to obtain a composite film; the primary composite film is subjected to 3 times longitudinal stretching and 4.5kW corona treatment to obtain a PE / PVA composite material; after applying DH-1101 polyurethane adhesive to the PVA layer of the PE / PVA composite material, glassine paper is attached to the PVA layer of the PE / PVA composite material to obtain the sealing cap film; wherein the twin-screw extruder temperature for the PE film material is 170-180℃, the twin-screw extruder temperature for the PVA film material is 185-195℃, the die temperature during blown film is 190-200℃, the thickness of the sealing cap film is 40μm, and the thickness of the PE film layer of the sealing cap film is 60% of the thickness of the PVA film layer.

[0026] Example 2

[0027] The fruit tea sealing film comprises: a PE film layer, a PVA film layer, and a glassine paper layer; wherein the PE film layer comprises the following components by weight: 60 parts linear low-density polyethylene, 15 parts linear high-density polyethylene, 15 parts low-density polyethylene, 18 parts ethylene-vinyl acetate copolymer, 3 parts tert-butyl peroxylaurate, 2 parts dicumyl peroxide, 4 parts antioxidant 1010, 0.5 parts maleic anhydride-grafted POE, and 1.5 parts dihydroxypropyl octadecanoate, wherein the grafting rate of maleic anhydride-grafted POE is 1.5%; the PVA film layer comprises the following components by weight: 100 parts polyvinyl alcohol resin, 2 parts polyethylene wax, 5 parts silicone oil, and 40 parts polyethylene glycol.

[0028] The preparation method of the fruit tea sealing cap film includes the following steps: PE film layer material and PVA film layer material are melted and filtered separately in a twin-screw extruder, then fed into a die for co-extrusion blown film to obtain a composite film; the primary composite film is subjected to 3 times longitudinal stretching and 4.5kW corona treatment to obtain a PE / PVA composite material; after applying DH-1101 polyurethane adhesive to the PVA layer of the PE / PVA composite material, glassine paper is attached to the PVA layer of the PE / PVA composite material to obtain the sealing cap film; wherein the twin-screw extruder temperature for the PE film layer material is 175-185℃, the twin-screw extruder temperature for the PVA film layer material is 180-190℃, the die temperature during blown film is 190-200℃, the thickness of the sealing cap film is 30μm, and the thickness of the PE film layer of the sealing cap film is 70% of the thickness of the PVA film layer.

[0029] Example 3

[0030] The fruit tea sealing film comprises: a PE film layer, a PVA film layer, and a glassine paper layer; wherein the PE film layer comprises the following components by weight: 55 parts linear low-density polyethylene, 12 parts linear high-density polyethylene, 12 parts low-density polyethylene, 16 parts ethylene-vinyl acetate copolymer, 2.4 parts tert-butyl peroxylaurate, 1.6 parts dicumyl peroxide, 3 parts antioxidant 1070, 0.4 parts maleic anhydride-grafted POE, and 1.2 parts dihydroxypropyl octadecanoate, wherein the grafting rate of maleic anhydride-grafted POE is 2.5%; the PVA film layer comprises the following components by weight: 95 parts polyvinyl alcohol resin, 10 parts polyethylene wax, 4 parts silicone oil, and 35 parts polyethylene glycol.

[0031] The preparation method of the fruit tea sealing cap film includes the following steps: PE film layer material and PVA film layer material are melted in a twin-screw extruder, filtered, and fed into a die for co-extrusion blown film to obtain a composite film; the primary composite film is subjected to 3 times longitudinal stretching and 4.5kW corona treatment to obtain a PE / PVA composite material; after applying DH-1101 polyurethane adhesive to the PVA layer of the PE / PVA composite material, glassine paper is attached to the PVA layer of the PE / PVA composite material to obtain the sealing cap film; wherein the twin-screw extruder temperature for the PE film layer material is 165-175℃, the twin-screw extruder temperature for the PVA film layer material is 190-210℃, the die temperature during blown film is 190-200℃, the thickness of the sealing cap film is 40μm, and the thickness of the PE film layer of the sealing cap film is 50% of the thickness of the PVA film layer.

[0032] Example 4

[0033] Compared with Example 3, Example 4 differs in that the weight parts of each component in the PE film layer are different. The PE film layer in Example 4 includes the following components in parts by weight: 55 parts of linear low-density polyethylene, 15 parts of linear high-density polyethylene, 12 parts of low-density polyethylene, 15 parts of ethylene-vinyl acetate copolymer, 1.2 parts of tert-butyl peroxylaurate, 0.8 parts of dicumyl peroxide, 2 parts of antioxidant 1010, 0.3 parts of maleic anhydride-grafted POE, and 0.5 parts of dihydroxypropyl octadecanoate, wherein the grafting rate of maleic anhydride-grafted POE is 2%. The thickness of the sealing cap film prepared in Example 4 is 35 μm, and the thickness of the PE film layer of the sealing cap film is 60% of the thickness of the PVA film layer.

[0034] Comparative Example 1

[0035] Compared with Example 1, Comparative Example 1 replaced tert-butyl peroxylaurate with an equal amount of dicumyl peroxide, and was otherwise the same as Example 1.

[0036] Comparative Example 2

[0037] Compared with Example 1, Comparative Example 2 replaced dicumyl peroxide with an equal amount of tert-butyl peroxide, and was otherwise the same as Example 1.

[0038] Comparative Example 3

[0039] Compared with Example 1, Comparative Example 3 differs in that it contains 0.8 parts of tert-butyl peroxylaurate and 1.2 parts of dicumyl peroxide.

[0040] Comparative Example 4

[0041] Compared with Example 1, Comparative Example 4 replaced tert-butyl peroxylaurate with an equal amount of dicumyl peroxide, and was otherwise the same as Example 1.

[0042] Comparative Example 5

[0043] Compared with Example 1, Comparative Example 5 did not contain tert-butyl peroxylaurate and dicumyl peroxide, but was otherwise the same as Example 1.

[0044] The thickness of the sealing cap films prepared in Comparative Examples 1-5 was 40 μm, and the thickness of the PE film layer of the sealing cap film was 60% of the thickness of the PVA film layer.

[0045] The temperature resistance of the sealing films prepared in Examples 1-4 and Comparative Examples 1-5 was determined.

[0046] Test method: Cut a 100mm×100mm sealing film as a sample, adjust the constant temperature oven to the test temperature, stop the blower, keep the temperature constant for 20 minutes, quickly put the sample into the oven, take it out after 1 minute, and visually inspect the appearance of the sample with a magnifying glass to check for bubbles and pits.

[0047] Table 1 Measurement Results

[0048]

[0049]

[0050] Compared to Example 1, Comparative Example 1 only added dicumyl peroxide, Comparative Example 2 only added tert-butyl peroxide, and Comparative Example 4 replaced tert-butyl peroxide with an equal amount of dicumyl peroxide. The results showed that the temperature resistance of the sealing films obtained in Comparative Examples 1, 2, and 4 was lower than that in Example 1, indicating that dicumyl peroxide and tert-butyl peroxide can have a synergistic effect, thereby improving the temperature resistance of the sealing film. Comparative Example 3 adjusted the ratio of tert-butyl peroxide to dicumyl peroxide, and the sealing film prepared in Comparative Example 3 had lower temperature resistance than that in Example 1.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A paper-effect sealing film for fruit tea, characterized in that, From the inside out, the layers are a PE film layer, a PVA film layer, and a glassine paper layer. The PE film layer comprises the following components by weight: 50-60 parts of linear low-density polyethylene, 10-15 parts of linear high-density polyethylene, 10-15 parts of low-density polyethylene, 15-18 parts of ethylene-vinyl acetate copolymer, 2-5 parts of modifier, 2-4 parts of antioxidant, 0.3-0.5 parts of compatibilizer, and 0.5-1.5 parts of dihydroxypropyl octadecanoate. The modifiers are tert-butyl peroxylaurate and dicumyl peroxide; The mass ratio of tert-butyl peroxylaurate to dicumyl peroxide is 3:

2.

2. The paper-effect fruit tea sealing film according to claim 1, characterized in that, The compatibilizer is maleic anhydride-grafted POE with a grafting rate of 1.5-2.5%.

3. The paper-effect fruit tea sealing film according to claim 1, characterized in that, The antioxidant includes one or more of antioxidant 1010, antioxidant 1070, and antioxidant 168.

4. The paper-effect fruit tea sealing film according to claim 1, characterized in that, The PVA film layer comprises the following components in parts by weight: 90-100 parts of polyvinyl alcohol resin, 8-12 parts of polyethylene wax, 2-5 parts of silicone oil, and 30-40 parts of polyethylene glycol.

5. The method for preparing a paper-effect fruit tea sealing film according to claim 1, characterized in that, Includes the following steps: S1. After melting the PE film material and the PVA film material separately, a composite film is obtained by two-layer blown film extrusion. S2. The composite film is subjected to longitudinal stretching and corona treatment to obtain a PE / PVA composite material; S3. Attach glassine paper to the PVA layer of the PE / PVA composite material to obtain a sealing film.

6. The method for preparing a paper-effect fruit tea sealing film according to claim 5, characterized in that, In step S3, the glassine paper is attached to the PVA layer of the PE / PVA composite material after applying adhesive to the PVA layer.

7. The method for preparing a paper-effect fruit tea sealing film according to claim 5, characterized in that, The melting temperature of the PE film material in S1 is 165-185℃, and the melting temperature of the PVA film material is 185-210℃.

8. The method for preparing a paper-effect fruit tea sealing film according to claim 5, characterized in that, The thickness of the sealing cap film is 30-40 μm; the thickness of the PE film layer of the sealing cap film is 50-70% of the thickness of the PVA film layer.

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