KR100563135B1 - Resin composition for protective film with high insulation properties and high abrasion resistance - Google Patents

Abstract

The present invention relates to a resin composition for a protective film having high insulation and high wear resistance, and more particularly, low density polyethylene (LDPE) resin or ethylene vinyl acetate (EVA) resin, polymethylpentene (PMP) resin and Newberg siliceous The present invention relates to a resin composition for a high insulating and high wear resistant protective film, characterized by mixing soil (Neuburg Siliceous Earth) at a predetermined composition ratio.

High insulation, high wear resistance, protective film, resin composition, low density polyethylene resin, ethylene vinyl acetate resin, polymethylpentene resin, Newberg siliceous earth

Description

RESIN COMPOSITION FOR PROTECTIVE FILM WITH HIGH INSULATION PROPERTIES AND HIGH ABRASION RESISTANCE}

The present invention relates to a resin composition for a protective film having high insulation and high wear resistance, and more particularly, low density polyethylene (LDPE) resin or ethylene vinyl acetate (EVA) resin, polymethylpentene (PMP) resin and Newberg siliceous The present invention relates to a resin composition for a high insulating and high wear resistant protective film, characterized by mixing soil (Neuburg Siliceous Earth) at a predetermined composition ratio.

The protective film is mainly used as a packaging material, and various properties such as electrical insulation are required according to its application, and various resins and additives are used to impart these properties. In particular, with the recent increase in the production of high value-added mechanical products, electronic products and heavy weight products, high electrical insulation and high wear resistance are required for the protective film used as the packaging material.

Generally used protective film resins include LDPE resins and EVA resins, but these resins, when used alone, provide electrical insulation and wear resistance at the level required for packaging materials of high value-added machinery, electronics and heavy products. There is a drawback that it cannot provide. Therefore, there is a need for development of a resin composition for a protective film that can provide a packaging material having high electrical insulation and high wear resistance.

It is an object of the present invention to add a resin composition for a high insulating, high wear resistance protective film that can be used as a packaging material of high value-added mechanical products, electronic products, heavy products and semiconductors by adding electrical insulation and wear resistance to the existing protective film resin. To provide.

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, Composition of PMP resin with a weight ratio of 1:99 to 99: 1, and includes 1 to 10 parts by weight of Newburgh siliceous earth with respect to 100 parts by weight of the basic resin and the total amount of PMP resin. A resin composition for film 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 0.1 to 30 g / 10 minutes and a density of 0.80 to 0.95 g / cm3, 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 vinyl acetate content of 2 to 50% by weight and a melt index of 0.1 to 100 g / 10 minutes, wherein the PMP It is preferable to use resin whose melt index is 2-100 g / 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 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.

Newburgh 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 protective film resin in terms of processability, and exhibits excellent characteristics in comparison with the conventional protective film resin 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 into a film molding machine at a constant mixing ratio, and their electrical insulation and abrasion resistance were evaluated after film molding. 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 Newberg Silicate Soil (parts by weight) Weight loss per cycle (mg) Volume resistivity (ohmcm) MI (g / 10min) Density (g / cm 3) MI (g / 10min) LDPE PMP Comparative Example 1 10 0.920 - 100 0 0 30 10 ¹² Example 1 0.1 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 placed in a film molding machine at a constant mixing ratio, and their electrical insulation and abrasion resistance were evaluated after film molding. 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 Newberg Silicate Soil (parts by weight) Weight loss per cycle (mg) Volume resistivity (ohmcm) MI (g / 10min) VA content (wt%) MI (g / 10min) EVA PMP Comparative Example 2 20 15 - 100 0 0 30 10 ¹² Example 10 0.1 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 protective film made of PMP mixed resin containing Newberg siliceous soil compared to the protective film made of LDPE or EVA alone was found to have excellent electrical insulation and wear resistance.

 As described above in detail, the resin composition for the high insulation and high wear resistance protective film of the present invention is excellent in electrical insulation and wear resistance as compared with the resin for the conventional protective film.

Claims (4)

A resin composition comprising a low density polyethylene resin or ethylene vinyl acetate resin as a basic resin, a polymethylpentene resin and Newberg siliceous soil, When the basic resin is a low density polyethylene resin having a melt index of 0.1 to 30 g / 10 minutes and a density of 0.80 to 0.95 g / cm 3, the melt index of the polymethylpentene resin is 2 to 30 g / 10 minutes, When the basic resin is an ethylene vinyl acetate resin having a content of vinyl acetate of 2 to 50% by weight and a melt index of 0.1 to 100 g / 10 minutes, the melt index of the polymethylpentene resin is 2 to 100 g / 10 minutes, The composition ratio of the basic resin and the polymethylpentene resin is 1:99 to 99: 1 by weight, and includes 1 to 10 parts by weight of Newberg siliceous soil based on 100 parts by weight of the total resin and the polymethylpentene resin. Resin composition for high insulation and high wear protection film. delete delete The resin composition of claim 1, wherein the composition ratio of the base resin and the polymethylpentene resin is 20:80 to 80:20 by weight.