KR20050005009A - Resin composition for extrusion coating and lamination with high insulation properties and high abrasion resistance - Google Patents

Abstract

PURPOSE: Provided is a resin composition for extrusion coating and extrusion lamination, which is used as packaging materials for mechanical products, electronic products, heavy products and semiconductors by excellent electrical insulation property and wear resistance. CONSTITUTION: The resin composition having high insulation property and wear resistance for extrusion coating and extrusion lamination comprises a low-density polyethylene(LDPE) resin or ethylene vinyl acetate(EVA) resin as a base resin, polymethylpentene(PMP) resin and Neuburg siliceous earth. In the resin composition, the mixing ratio of the base resin to polymethylpentene resin is 1:99-99:1 on the weight basis, and the Neuburg siliceous earth is present in an amount of 1-10 parts by weight per 100 parts by weight of the combined weight of the base resin and PMP resin.

Description

RESIN COMPOSITION FOR EXTRUSION COATING AND LAMINATION WITH HIGH INSULATION PROPERTIES AND HIGH ABRASION RESISTANCE}

The present invention relates to a resin composition for extrusion coating and extrusion lamination having high insulation and high wear resistance, and more particularly, low density polyethylene (LDPE) resin or ethylene vinyl acetate (EVA) resin, polymethyl pentene (PMP) resin and The present invention relates to a resin composition for high insulation, high wear resistance extrusion coating and extrusion lamination, which is made by mixing Neuburg Siliceous Earth at a predetermined composition ratio.

The purpose of extrusion coating and extrusion lamination is to manufacture a new high-functional composite material by integrating the coating resin and the substrate to be coated to complement each other. Composite materials produced by extrusion coating and extrusion lamination are mainly used as packaging materials, and various resins and additives are used to impart properties suitable for the purpose. In particular, with the recent increase in the production of high value-added mechanical products, electronic products and heavy products, high electrical insulation and high wear resistance are required for extrusion coating composite materials used as packaging materials.

Extrusion coating resins generally used include LDPE resins and EVA resins. However, these resins, when used alone for extrusion coating, have high electrical insulation properties required for packaging materials of high value-added machinery, electronics and heavy products. And disadvantages of not providing wear resistance. Therefore, there is a need for development of a resin composition for extrusion coating that can provide a packaging material having high electrical insulation and high wear resistance.

An object of the present invention is to add electrical insulation and wear resistance to existing extrusion coating resins for high insulation, high wear resistance extrusion coating and extrusion lamination that can be used as packaging materials for high value-added mechanical products, electronic products, heavy products and semiconductors It is to provide a resin composition.

According to the present invention, a resin composition comprising a low density polyethylene (LDPE) resin or an ethylene vinyl acetate (EVA) resin, a polymethylpentene (PMP) resin, and Neuburg Siliceous Earth as a base resin, And a PMP resin composition ratio of 1:99 to 99: 1, and high insulation and high wear resistance extrusion comprising 1 to 10 parts by weight of Newburgh siliceous earth based on 100 parts by weight of the basic resin and PMP resin A resin composition for coating and extrusion lamination is provided.

When the LDPE resin is used as the base resin in the composition of the present invention, it is preferable to use an LDPE resin having a melt index of 2 to 30 g / 10 minutes and a density of 0.80 to 0.95 g / cm 3, wherein the PMP resin has a melt index. It is preferable to use what is 2-30g / 10min. If the melt index of the PMP resin is less than 2g / 10 minutes, there is a problem that the workability is worse, if it exceeds 30g / 10 minutes there is a problem that the film breaks during processing.

In addition, when the EVA resin is used as the base resin in the composition of the present invention, it is preferable to use an EVA resin having a content of vinyl acetate of 2 to 50% by weight and a melt index of 7 to 100 g / 10 minutes, wherein the PMP resin It is preferable to use a melt index of 2 to 100 g / 10 minutes. If the melt index of the PMP resin is less than 2g / 10 minutes, there is a problem that the workability is worse, if more than 100g / 10 minutes there is a problem that the film break occurs during processing.

In view of improving electrical insulation, the composition ratio of the base resin and the PMP resin is preferably in a weight ratio of 1:99 to 99: 1, more preferably in a weight ratio of 20:80 to 80:20, and 50 Even more preferred is a weight ratio of 50.

Neuburg Siliceous Earth, used in the present invention, is a natural silica produced by the natural combination of fine quartz and thin plank layer kaolinite, which is included to impart high wear resistance to the resin composition. It is preferable that 1-10 weight part is included with respect to 100 weight part of basic resins and PMP resin total amount. When the Newberg siliceous soil is included in less than 1 part by weight based on 100 parts by weight of the basic resin and the total amount of PMP resin, desired wear resistance cannot be obtained, and when included in excess of 10 parts by weight, the processability of the resin composition is deteriorated.

The resin composition prepared as described above is similar to the conventional coating resin in terms of high-speed processing, and exhibits very excellent characteristics in comparison with conventional coating resins in terms of electrical insulation and wear resistance.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but these Examples are for illustrative purposes only, and the present invention is not limited thereto.

[Examples 1-9 and Comparative Example 1]

As shown in Table 1 below, LDPE resins having various melting indices, PMP resins, and Newberg siliceous earth were put in an extrusion coating machine at a constant mixing ratio, and their electrical insulation and abrasion resistance were evaluated after molding the coating film. Electrical insulation was evaluated by measuring the Volume Resistivity presented in ASTM D257, and wear resistance was evaluated by measuring the cycle-by-cycle weight loss presented in ASTM D4060. The results are shown in Table 1 below.

TABLE 1

LDPE Resin PMP Resin LDPE / PMP Mixing Ratio (Weight Ratio) Newberg Silicate Soil (parts by weight) Weight loss per cycle (mg) Volume resistivity (ohmcm) MI (g / 10 min) Density (g / cm 3) MI (g / 10 min) LDPE PMP Comparative Example 1 10 0.920 - 100 0 0 30 10 ¹² Example 1 2 0.920 2 80 20 5 20 10 ¹⁶ Example 2 5 0.920 5 80 20 5 20 10 ¹⁶ Example 3 10 0.920 10 80 20 5 20 10 ¹⁶ Example 4 15 0.920 15 80 20 5 20 10 ¹⁶ Example 5 20 0.920 20 80 20 5 20 10 ¹⁶ Example 6 30 0.928 30 80 20 5 20 10 ¹⁶ Example 7 10 0.920 10 99 One 5 20 ^1.2 x ^{10 12} Example 8 10 0.920 10 50 50 5 20 ^1.6 x 10 ¹⁶ Example 9 10 0.920 10 One 99 5 20 2 x 10 ¹⁶

[Examples 10-23 and Comparative Example 2]

As shown in Table 2, EVA resin, PMP resin, and Newberg siliceous earth having various vinyl acetate contents and melt index were put in an extrusion coating machine at a constant mixing ratio, and their electrical insulation and abrasion resistance were evaluated after molding the coating film. Electrical insulation was evaluated by measuring the Volume Resistivity presented in ASTM D257, and wear resistance was evaluated by measuring the cycle-by-cycle weight loss presented in ASTM D4060. The results are shown in Table 2 below.

TABLE 2

EVA resin PMP Resin EVA / PMP mixing ratio (weight ratio) Newberg Silicate Soil (parts by weight) Weight loss per cycle (mg) Volume resistivity (ohmcm) MI (g / 10 min) VA content (wt%) MI (g / 10 min) EVA PMP Comparative Example 2 20 15 - 100 0 0 30 10 ¹² Example 10 7 15 2 80 20 5 20 10 ¹⁶ Example 11 10 15 10 80 20 5 20 10 ¹⁶ Example 12 15 15 15 80 20 5 20 10 ¹⁶ Example 13 30 15 30 80 20 5 20 10 ¹⁶ Example 14 50 15 50 80 20 5 20 10 ¹⁶ Example 15 100 15 100 80 20 5 20 10 ¹⁶ Example 16 15 2 15 80 20 5 20 10 ¹⁶ Example 17 15 10 15 80 20 5 20 10 ¹⁶ Example 18 15 20 15 80 20 5 20 10 ¹⁶ Example 19 15 30 15 80 20 5 20 10 ¹⁶ Example 20 15 50 15 80 20 5 20 10 ¹⁶ Example 21 15 15 15 99 One 5 20 ^1.2 x ^{10 12} Example 22 15 15 15 50 50 5 20 ^1.6 x 10 ¹⁶ Example 23 15 15 15 One 99 5 20 2 x 10 ¹⁶

As can be seen from Table 1 and Table 2, the film for extrusion coating and extrusion lamination made of PMP mixed resin containing Newberg siliceous soil compared to the film for extrusion coating and extrusion lamination made of LDPE or EVA alone is Insulation and wear resistance were found to be excellent.

As described in detail above, the resin composition for high insulation, high wear resistance extrusion coating and extrusion lamination of the present invention is excellent in electrical insulation and wear resistance as compared to the resin for extrusion coating and extrusion lamination.

Claims (4)

A resin composition comprising a low density polyethylene resin or an ethylene vinyl acetate resin, a polymethylpentene resin, and Newberg siliceous soil as a basic resin, wherein the composition ratio of the basic resin and the polymethylpentene resin is 1:99 to 99: 1 by weight ratio. A resin composition for high insulation, high wear resistance extrusion coating and extrusion lamination comprising 1 to 10 parts by weight of Newberg siliceous earth based on 100 parts by weight of the base resin and 100 parts by weight of polymethylpentene resin. The method of claim 1, wherein the low density polyethylene resin has a melt index of 2 ~ 30g / 10 minutes, a density of 0.80 ~ 0.95g / cm 3, the polymethylpentene resin is characterized in that the melt index is 2 ~ 30g / 10 minutes Resin composition for insulation, high wear resistance extrusion coating and extrusion lamination. According to claim 1, wherein the ethylene vinyl acetate resin is a vinyl acetate content of 2 to 50% by weight, the melt index is 7 to 100g / 10 minutes, the polymethyl pentene resin is characterized in that the melt index is 2 to 100g / 10 minutes Resin composition for high insulation, high wear resistance extrusion coating and extrusion lamination. According to any one of claims 1 to 3, wherein the composition ratio of the base resin and the polymethyl pentene resin is made of a weight ratio of 20:80 to 80:20, characterized in that the high insulation, high wear resistance extrusion coating and extrusion Resin composition for lamination.