High adhesion strength composite packaging material and process for producing the same

Abstract

The application relates to the technical field of packaging materials, and discloses a high-adhesion-strength composite packaging material and a production process thereof, wherein the high-adhesion-strength composite packaging material comprises, from bottom to top, a PP non-woven fabric layer, a flow-casting film layer and a BOPP film layer; the flow-casting film layer comprises the following components by weight: 30-50 parts of PP, 5-15 parts of PE, 2-3 parts of ethylene-propylene-diene rubber, 5-8 parts of inorganic fillers and 4-6 parts of 2-fluoro-5-methylphenyl isocyanate. Through the technical scheme, the tensile strength and the bonding strength of the composite packaging material are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the packaging material technical field, specifically, a kind of high adhesive strength composite packaging material and its production process. BACKGROUND

[0002] Packaging material refers to the materials used to meet the product packaging requirements of packaging containers, packaging decoration, packaging printing, packaging transportation and the like. Packaging material plays an important role in the entire packaging industry, and is the basis for developing packaging technology, improving packaging quality and reducing packaging cost.

[0003] Non-woven fabric, also known as non-woven fabric, is a new type of packaging material. When preparing packaging materials, non-woven fabric is often compounded with other functional films to improve the tensile strength of the packaging material. However, due to the poor interlayer adhesion of the composite packaging material, the service life of the composite packaging material is shortened during use. SUMMARY

[0004] The present application provides a kind of high adhesive strength composite packaging material and its production process, solve the tensile strength and adhesion of the composite packaging material in the related art are low The problem.

[0005] The technical scheme of the present application is as follows:

[0006] The present application provides a kind of high adhesive strength composite packaging material, from bottom to top, PP non-woven fabric layer, casting film layer, BOPP film layer, the casting film layer includes the following components by weight of raw materials: 30~50PP, 5~15PE, 2~3EPDM, 5~8inorganic filler, 4~6isocyanate 2-fluoro-5-methyl phenyl ester.

[0007] As a further technical scheme, the filler includes one or more of kaolin, talc powder and mica powder.

[0008] As a further technical scheme, the particle size of the filler is 325~600 mesh.

[0009] As a further technical scheme, the mass ratio of isocyanate 2-fluoro-5-methyl phenyl ester and inorganic filler is 0.8~2:1.

[0010] As a further technical scheme, the mass ratio of isocyanate 2-fluoro-5-methyl phenyl ester and inorganic filler is 5:6.

[0011] The present application finds that when isocyanate 2-fluoro-5-methyl phenyl ester and inorganic filler are added in a specific ratio, the transverse tensile strength, longitudinal tensile strength and adhesion of the composite packaging material can be further improved.

[0012] As a further technical solution, the preparation method of the cast film layer comprises the following steps: after the raw materials of the cast film layer are uniformly mixed, extrusion, casting, shaping, and corona treatment are performed to obtain the cast film layer.

[0013] As a further technical solution, the output power of the corona is 6-8 kW.

[0014] As a further technical solution, the BOPP film layer comprises the following components by weight: 40-50 parts of isotactic polypropylene, 2-3 parts of nano-silicon dioxide, 0.1-0.2 parts of a pearlescent agent, and 0.1-0.2 parts of a slip agent.

[0015] As a further technical solution, the pearlescent agent is calcium carbonate.

[0016] As a further technical solution, the slip agent comprises one or more of silicone, oleic acid amide, and vinyl bis-stearamide.

[0017] As a further technical solution, the preparation method of the BOPP film layer comprises the following steps: after the raw materials of the BOPP film layer are uniformly mixed, melt extrusion shaping and stretching treatment are performed, and then shaping is performed to obtain the BOPP film layer.

[0018] The application also includes a production process of a high-adhesion-strength composite packaging material, which comprises the following steps: after a PP non-woven fabric layer, a cast film layer, and a BOPP film layer are sequentially compounded in the order from bottom to top, a composite packaging material is obtained.

[0019] As a further technical solution, the thickness of the PP non-woven fabric layer is 20-30 mu m, the thickness of the cast film layer is 10-12 mu m, and the thickness of the BOPP film layer is 20-25 mu m.

[0020] The working principle and beneficial effects of the application are as follows:

[0021] In the application, the cast film is mainly composed of PP and PE, PP has the characteristics of high tensile strength, environmental protection, and light weight, PE is light and soft; the addition of EPDM can improve the transverse tensile strength and longitudinal tensile strength of the composite packaging material, and the addition of 2-fluoro-5-methylphenyl isocyanate can improve the adhesion between the PP non-woven fabric and the BOPP film in the composite packaging material, and further improve the transverse tensile strength and longitudinal tensile strength of the composite packaging material. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0023] In the following examples and comparative examples:

[0024] PP: Model M250E, Shanghai Petrochemical;

[0025] PE: Model N150, Shanghai Petrochemical;

[0026] Ethylene-propylene-diene rubber: Model 3092PM, Shanghai Sinopec Mitsui;

[0027] Isotactic polypropylene: Model K1023, Taiwan Huahua, China.

[0028] Example 1

[0029] A production process of a high-adhesion-strength composite packaging material, comprising the following steps:

[0030] S1, 30 parts of PP, 5 parts of PE, 2 parts of ethylene-propylene-diene rubber, 6 parts of kaolin (325 mesh), and 5 parts of 2-fluoro-5-methylphenyl isocyanate are uniformly mixed, extruded, cast, cooled and shaped, subjected to 8kW power corona, and edge cut to obtain a cast film with a thickness of 12μm;

[0031] S2, 40 parts of isotactic polypropylene, 5 parts of nano-silicon dioxide (3000 mesh), 0.1 parts of calcium carbonate, and 0.1 parts of oleic acid amide are uniformly mixed, subjected to melt extrusion and shaping, and then subjected to stretching treatment and shaping to obtain a BOPP film with a thickness of 25μm;

[0032] S3, the composite packaging material is obtained by sequentially compounding in the order of PP non-woven fabric (thickness 30μm), the cast film, and the BOPP film from bottom to top.

[0033] Example 2

[0034] A production process of a high-adhesion-strength composite packaging material, comprising the following steps:

[0035] S1, 40 parts of PP, 10 parts of PE, 2.5 parts of ethylene-propylene-diene rubber, 5 parts of kaolin (400 mesh), and 6 parts of 2-fluoro-5-methylphenyl isocyanate are uniformly mixed, extruded, cast, cooled and shaped, subjected to 7kW power corona, and edge cut to obtain a cast film with a thickness of 10μm;

[0036] S2, 45 parts of isotactic polypropylene, 7 parts of nano-silica (3000 mesh), 0.15 parts of calcium carbonate, 0.15 parts of vinyl bis stearamide are uniformly mixed, then melt-extruded, stretched, and shaped to obtain a BOPP film with a thickness of 22 μm;

[0037] S3, after compounding in the order of PP non-woven fabric (thickness 25 μm), the cast film, and the BOPP film from bottom to top, a composite packaging material is obtained.

[0038] Example 3

[0039] A production process of a high-adhesion-strength composite packaging material, comprising the following steps:

[0040] S1, 50 parts of PP, 15 parts of PE, 3 parts of ethylene-propylene-diene rubber, 8 parts of talc (600 mesh), and 4 parts of 2-fluoro-5-methylphenyl isocyanate are uniformly mixed, then extruded, cast, and cooled to shape, 6 kW power corona, and edge cut to obtain a cast film with a thickness of 10 μm;

[0041] S2, 50 parts of isotactic polypropylene, 8 parts of nano-silica (3000 mesh), 0.2 parts of calcium carbonate, and 0.2 parts of oleic acid amide are uniformly mixed, then melt-extruded, stretched, and shaped to obtain a BOPP film with a thickness of 20 μm;

[0042] S3, after compounding in the order of PP non-woven fabric (thickness 20 μm), the cast film, and the BOPP film from bottom to top, a composite packaging material is obtained.

[0043] Example 4

[0044] This example is different from Example 1 only in that the kaolin (325 mesh) is 5 parts and the 2-fluoro-5-methylphenyl isocyanate is 6 parts.

[0045] Example 5

[0046] This example is different from Example 1 only in that the kaolin (325 mesh) is 7 parts and the 2-fluoro-5-methylphenyl isocyanate is 4 parts.

[0047] Comparative Example 1

[0048] This comparative example is different from Example 1 only in that no ethylene-propylene-diene rubber is added.

[0049] Comparative Example 2

[0050] This comparative example is different from Example 1 only in that no 2-fluoro-5-methylphenyl isocyanate is added.

[0051] Test Example

[0052] The composite packaging material prepared in Examples 1-5 and Comparative Examples 1-2 was measured for transverse tensile strength and longitudinal tensile strength according to the measurement method in GB / T 1040.3-2006 “Determination of tensile properties of plastics-Part 3: test conditions for films or sheets”; a peeling test sample strip was prepared by cutting the composite film into 100 mm x 15 mm, the sample strip was fixed on a peeling clamp, T peeling test was performed, the peeling speed was 50 mm / min, the peeling length was 50 mm, the bonding strength was measured, and the measurement results are shown in Table 1.

[0053] Table 1: Performance measurement results of the composite packaging material in Examples 1-5 and Comparative Examples 1-2

[0054]

[0055] Compared with Example 1, Comparative Example 1 did not add EPDM, and Comparative Example 2 did not add 2-fluoro-5-methylphenyl isocyanate, and the transverse tensile strength, longitudinal tensile strength and bonding strength of the composite packaging material in Comparative Examples 1-2 were all lower than those in Example 1, indicating that adding EPDM and 2-fluoro-5-methylphenyl isocyanate can improve the transverse tensile strength, longitudinal tensile strength and bonding strength of the composite packaging material.

[0056] Compared with Example 1, the amount of EPDM and 2-fluoro-5-methylphenyl isocyanate was changed in Examples 4-5, and the transverse tensile strength, longitudinal tensile strength and bonding strength of the composite packaging material in Example 4 were all higher than those in Examples 1 and 5, indicating that when the mass ratio of EPDM and 2-fluoro-5-methylphenyl isocyanate is 5:6, the transverse tensile strength, longitudinal tensile strength and bonding strength of the composite packaging material can be further improved.

[0057] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high bond strength composite packaging material, characterized by, From bottom to top are PP non-woven fabric layer, cast film layer and BOPP film layer, the cast film layer comprises raw materials in the following weight parts: 30-50 parts of PP, 5-15 parts of PE, 2-3 parts of ethylene-propylene-diene rubber, 5-8 parts of inorganic filler and 4-6 parts of 2-fluoro-5-methylphenyl isocyanate.

2. A high bond strength composite packaging material according to claim 1, characterized in that, The inorganic filler comprises one or more of kaolin, talcum powder and mica powder.

3. A high bond strength composite packaging material according to claim 1, wherein, The particle size of the inorganic filler is 325-600 mesh.

4. A high bond strength composite packaging material according to claim 1, wherein, The preparation method of the cast film layer comprises the following steps: uniformly mixing the raw materials of the cast film layer, extruding, casting, setting, corona treatment and obtaining the cast film layer.

5. A high bond strength composite packaging material according to claim 4, wherein, The output power of the corona treatment is 6-8 kW.

6. A high bond strength composite packaging material according to claim 1, wherein, The BOPP film layer comprises raw materials in the following weight parts: 40-50 parts of isotactic polypropylene, 2-3 parts of nano-silicon dioxide, 0.1-0.2 parts of pearlescent agent and 0.1-0.2 parts of slip agent.

7. A high bond strength composite packaging material according to claim 6, characterized in that, The pearlescent agent is calcium carbonate.

8. A high bond strength composite packaging material according to claim 6, wherein, The slip agent comprises one or more of silicone, oleic acid amide and vinyl bis-stearamide.

9. A process for the production of a high bond strength composite packaging material according to any one of claims 1 to 8, characterized in that, The method comprises the following steps: After compounding in the order of PP non-woven fabric layer, cast film layer and BOPP film layer from bottom to top, a composite packaging material is obtained.

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