KR20160076022A

KR20160076022A - Nylon film having an excellent slip and the preparation thereof

Info

Publication number: KR20160076022A
Application number: KR1020140185038A
Authority: KR
Inventors: 김태곤; 김용원; 전용현
Original assignee: 주식회사 효성
Priority date: 2014-12-19
Filing date: 2014-12-19
Publication date: 2016-06-30

Abstract

The present invention relates to a resin composition comprising 80 to 99% by weight of nylon 6 resin (relative strength (RV) of 3.3 or more), 100 to 1,000 ppm of inorganic particles (A) having an average particle diameter of 2 to 3 탆, (B) 1,000 to 2,000 ppm of a multifilament nylon film having a four-direction (MD, TD) strength value of 280 MPa or more, a heat shrinkage rate (95 ° C water, 30 minutes) of 3% or less and a friction coefficient of 0.3 or less As a result,
Here, the inorganic particles (A) are selected from spherical silicon beads, gel silica or spherical alumina silica, and the inorganic particles (B) contain kaolin.

Description

TECHNICAL FIELD [0001] The present invention relates to a nylon film having improved slip properties and a method for producing the same. BACKGROUND OF THE INVENTION [0001]

The present invention relates to a nylon film having improved slip properties and a method for producing the same.

The nylon film is superior in gas barrier properties to other films and is widely used as a material for vacuum food packaging, balloon, etc. Recently, the use of nylon film as pouch for pharmaceutical packaging or secondary battery has been increasing.

In general, a small amount of an additive is added to the nylon film in order to prevent stretching at the time of film forming, blocking during the heat treatment process, and winding of the film. The properties of the film are somewhat different depending on the individual films, but in addition to their physical properties, high-speed productivity, slitting, printing, and laminating processes must be easy in the subsequent process. No matter how good the performance of the film is, if it is not easy to produce and post-process, it is difficult to use it commercially. Therefore, the post-process suitability and slip property of the film are important.

There are many recent methods for improving the slip property, the processability and the moldability of the pouch nylon film,

① Japanese Patent Registration No. 10-1427677 (registered on Aug. 1, 2014) discloses an invention relating to a nylon film for pouches, which comprises an inorganic particle (A) having an average particle diameter of 1 to 5 탆 and an organic particle having an average particle diameter of 1 to 5 탆 (B) and inorganic particles (C) having an average particle diameter of 0.05 to 2 탆, wherein the total content of the particles in the film is 1,600 to 13,000 ppm and the relative viscosity (RV) is 2.6 to 3.5 So,

A nylon film having a coefficient of friction of 0.05 to 0.3 according to ASTM D1894, a modulus of 250 to 350 kg / cm 2 according to ASTM D882 and a film haze of 10 to 50 according to ASTM D1003 has been introduced The bar,

Wherein the inorganic particles (A) and the inorganic particles (C) are selected from zeolite, alumina, silica, kaolin, sodium oxide (Na ₂ O) or calcium oxide (CaO) (A) and an organic particle (B) are spherical, and the inorganic particles (C) have a low coefficient of friction and a low modulus, obtained by using an irregular mass, and have a pouch type depth (Moldability) of a nylon film has been introduced.

② In addition, Japanese Patent Laid-Open Publication No. 10-2014-0087603 (published on Apr. 19, 2014) discloses an invention relating to a nylon film for a cell pouch having improved moldability, wherein nylon resin 6 having a viscosity of 3.3 or more and meta xylene di (A) having an average particle diameter of 1 to 3 占 퐉 and a slipping agent which is an organic material and has a strength of 280 MPa or more, a heat shrinkage rate of 3% or less, and a moldability of 8 mm or more. (A) Kaolin and an organic slip agent are respectively 500 to 2,000 ppm. The total amount of the slip agent is 500 to 2,000 ppm, and the extruded product is extruded into a ring die. A nylon film formed by stretching and thermoforming and having improved moldability has been introduced.

However, these conventional techniques still suffer from roll wear and film breakage due to an increase in the inorganic particle hardness during the manufacturing process, and there is a problem in particle dispersibility of the inorganic particles (A) and there is much room for improvement.

Patent Registration No. 10-1427677 (Registered on August 1, 2014) Open Patent No. 10-2014-0087603 (A) (published on Jul. 09, 2014)

The present invention provides a nylon film improved in slipperiness due to poor compatibility of inorganic particles in a film manufacturing process and a method for producing the same.

In order to achieve the above-mentioned object, the present invention provides a nylon 6 resin composition comprising 80 to 99% by weight of nylon 6 resin (relative viscosity (RV) of 3.3 or more), 100 to 1,000 ppm of inorganic particles (A) having an average particle size of 2 to 3 탆, (MD, TD) strength value of 280 MPa or more, a heat shrinkage rate (95 占 폚 water, 30 minutes) of 3% or less and a coefficient of friction of 0.3 or less, which is composed of 1,000 to 2,000 ppm of inorganic particles (B) By providing a nylon film having lip properties, the problems of the prior art can be solved.

The high-lip nylon film according to the present invention is excellent in post-processing (formability) with low friction coefficient in comparison with conventional nylon film, and secondly, in the high temperature and high humidity environment (summer) It is advantageous for the application of the product requiring the fairness and the moldability in the post-processing.

1 is a scanning electron micrograph of spherical silicon beads of the present invention,
2 is a graph of particle distribution of spherical silicon beads of the present invention.

The present invention relates to a nylon film having an improved slip property and a method for producing the same. More specifically, the present invention relates to a nylon film comprising 80 to 99% by weight of nylon 6 resin (relative viscosity (RV) of 3.3 or more) (MD, TD) strength value of 280 MPa or higher and a heat shrinkage rate (95 占 폚 water, 30 minutes) of 3,000 to 1,000 ppm and 1,000 to 2,000 ppm of inorganic particles (B) having an average particle diameter of 1 to 2 占 퐉, Hereinafter, the nylon film having a high elastic modulus with a friction coefficient of 0.3 or less and

(B) having 100 to 1,000 ppm of inorganic particles (A) having an average particle size of 2 to 3 占 퐉 and an average particle size of 1 to 2 占 퐉 in 80 to 99% by weight (relative viscosity (RV) 1,000 to 2,000 ppm are mixed to prepare a nylon 6 masterbatch resin having a relative viscosity of 3.0, extruded, biaxially stretched and thermally fixed to produce a high-slip nylon film.

Examples of the inorganic particle (A) component usable in the present invention include spherical silicon beads, gel silica or spherical alumina silica. The spherical silicon beads are preferably used, and the amount thereof is preferably 100 to 1,000 ppm, particularly 100 To 500 ppm is preferable. If the content of the spherical silicon beads is less than 100 ppm, the slip property is not improved. If the content is more than 1,000 ppm, the turbidity of the film may be increased and the mechanical properties may be deteriorated. Therefore, when the spherical silicone bead of the present invention is used, it exhibits good characteristics for improving the slip property, and has a hardness lower than that of the conventional spherical alumina, which is advantageous for the stability of the film production process. When the hardness is low, The plant has good water management and fairness characteristics.

As an example of the inorganic particle (B) component usable in the present invention, kaolin is preferable, and its amount to be used is preferably 1,000 to 2,000 ppm in the film. When the content is less than 1,000 ppm, the slip property is not exhibited. When the content is more than 2000 ppm, the slip property is not improved any more.

The nylon film according to the present invention has an advantage of being advantageous in pouch formability in application, and is advantageously applicable to packaging for a pouch of a secondary cell pouch in a pouch.

Examples of the present invention will now be described with reference to Examples, Examples and Comparative Examples.

Reference Example

The physico-chemical properties of the spherical silicon beads of the present invention and the conventional gel silica, colloidal silica or kaolin are summarized and summarized in Table 1.

In the case of the silicon beads according to the present invention, the slip characteristics are good in comparison with the conventional inorganic particles (silica, kaolin) and spherical shape, and the hardness is low compared to silica, And exhibits good properties in terms of prevention of intergranular aggregation due to hydrophobicity imparting.

Table 1

Scanning Electron Microscope (SEM) photographs of spherical silicon beads of the present invention are shown in Fig. 1, and a graph of particle distribution is shown in Fig.

The siloxane bond, which is the basic skeleton of silicon, has a side chain. In the case of dimethylsilicone, which is one of the most popular examples of silicon, an organic group called a hydrophobic methyl group is attached, which is difficult to get close to water. The molecule of silicon has a spiral structure and the outside of the helix is covered with this methyl group, so that it becomes water repellent. Silicon has a low surface tension due to a small attractive force between molecules as described above, and is easy to spread on the substrate surface. As described above, since silicon has a large binding energy, silicon is hardly affected by acid or alkali having a concentration of 10% or less at room temperature, and there is little change in physical properties. In addition, since it has almost no adverse effects such as deterioration or damage of other substrates such as an organic resin, it can be said that the product is highly stable. In silicon, silicon has a positive charge and oxygen has a negative charge, and 50% of the molecules have ion-binding properties, which is a characteristic of chemical bonding.

Example One

1.0% by weight of spherical silicon beads having a diameter of 2.0 占 퐉 and 5.0% by weight of kaolin having a diameter of 1.5 占 퐉 as an inorganic particle (B) component as an inorganic particle (A) component were mixed in a nylon 6 resin having a relative viscosity of 3.3, 3.0 nylon 6 master batch resin. As shown in Table 2 below, the inorganic particles (A) prepared with the nylon 6 base resin in the extruder were mixed with 1% of the master batch resin so that 100 ppm in the film and 2% of the inorganic particles (B) Were mixed and extruded. Subsequently, extruded at 265 to 280 ° C using a ring die, stretched at the same time biaxially 3 times by 3 times by tubular method, and heat-set to prepare a nylon film (25 micron). Further, the friction coefficient and formability (mm) of the thus prepared film were measured, and the results are shown in Table 3. [

Example 2

The procedure of Example 1 was repeated except that 300 ppm of spherical silicon beads having a diameter of 2.0 탆 was used as the inorganic particle (A).

Example 3

The procedure of Example 1 was repeated except that 500 ppm of spherical silicon beads having a diameter of 2.0 탆 was used as the inorganic particle (A).

Example 4

The procedure of Example 1 was repeated, except that gel silica was used as the inorganic particle (A) component.

Example 5

The procedure of Example 1 was repeated, except that spherical alumina silica was used as the inorganic particle (A) component.

Comparative Example One

The procedure of Example 1 was repeated except that the inorganic particle (A) component was not used.

Table 2 Examples and Comparative Examples

Table 3 Results

(Note: Measuring method of tensile strength (Mpa): Performed according to ASTM D882 test method.

Method of measuring elongation (%); Perform according to ASTM D882 experiment.

A method of measuring the coefficient of friction; Performed according to ASTM D1894.

A method of measuring the formability (mm); Prepare a specimen (10 cm x 10 cm) prepared by nylon film and aluminum foil laminating process. The mold depth is measured and analyzed by pressing it in a mold (3 cm x 5 cm).

According to the experimental results of the present invention, as the content of the spherical silicon beads increases, the slip property improves and the film is more stable than the spherical alumina. Therefore, the hardness is lower than that of spherical alumina, and the degree of abrasion as it passes through the roll is low, indicating that the plant exhibits good water management and fairness characteristics.

Furthermore, the nylon film according to the present invention has sufficient moldability for use in packaging of medicines and secondary battery cell pouches.

Claims

(B) an inorganic particle (A) having an average particle size of 2 to 3 탆 and an inorganic particle (B) having an average particle size of 1 to 2 탆, wherein the inorganic particle (A) contains 80 to 99% by weight (relative viscosity Wherein the thermoplastic film has a tensile strength of 280 MPa or more, a heat shrinkage (95 ° C water, 30 minutes) of 3% or less, and a friction coefficient of 0.3 or less.

The high-lipid nylon film according to claim 1, wherein the inorganic particles (A) are selected from spherical silicon beads, gel silica or spherical alumina silica, and the inorganic particles (B) are kaolin.

The high-lipid nylon film according to claim 2, wherein the spherical silicon bead is 100 to 500 ppm and the kaolin is 1,000 to 2,000 ppm.

100 to 1,000 ppm of inorganic particles (A) having an average particle diameter of 2 to 3 占 퐉 and inorganic particles (B) having an average particle diameter of 1 to 2 占 퐉 are dispersed in 80 to 99% by weight (relative viscosity (RV) (MD, TD) strength value of 280 MPa or more and a heat shrinkage rate (MD, TD) of 1,000 to 2,000 ppm were mixed to prepare a nylon 6 masterbatch resin having a relative viscosity of 3.0, extruded and twisted and heat- 95 占 폚 water, 30 minutes) of 3% or less and a friction coefficient of 0.3 or less.

The method according to claim 4, wherein the inorganic particles (A) are selected from spherical silicon beads, gel silica or spherical alumina silica, and the inorganic particles (B) are kaolin.

The method according to claim 5, wherein 100 to 500 ppm of spherical silicon beads are used and 1,000 to 2,000 ppm of kaolin is used.