KR19980033774A - Polyethylene container with UV protection - Google Patents

Abstract

The present invention is prepared by using a polyethylene resin melt-kneaded with 2- (2'-hydroxy-3'-tertbutyl-5'-methylphenyl) -5-chloro-benzotriazole, thereby improving ultraviolet ray blocking ability and increasing sunlight. The present invention relates to a transparent or semi-transparent polyethylene container having a sun protection function that can prevent discoloration of the contents of detergents, fabric softeners, and hair shampoos.

Description

Polyethylene container with UV protection

1 is a graph comparing the UV transmittance of a polyethylene container according to the present invention and a conventional polyethylene container.

[Purpose of invention]

The present invention relates to a transparent or translucent polyethylene container with UV protection. More specifically, the present invention is prepared using a polyethylene resin obtained by melt kneading 2- (2'-hydroxy-3'-tertbutyl-5'-methylphenyl) -5-chloro-benzotriazole, thereby improving UV blocking ability. The present invention relates to a transparent or semi-transparent polyethylene container having a sun protection function that can prevent discoloration of contents of detergents, fabric softeners, and hair shampoo products by daylight during distribution.

Herein, the transparent container refers to a container in which a container is made by using a low density polyethylene and the content of the content is revealed when the content is contained in the container. By making a container, it refers to a container whose contents are lightly colored when the contents are contained.

[Technical Field to which the Invention belongs and Prior Art in the Field]

Polyethylene containers used in detergents, fabric softeners, and hair cosmetics containers are generally manufactured as opaque containers with colors by mixing pigments with resins. There is a problem that the aesthetic effect is reduced due to the opaque color of the contents used.

In order to solve this problem, when a transparent or semi-transparent container is manufactured using only a polyethylene resin without using a pigment, discoloration of contents may occur due to ultraviolet rays during daylight distribution, thereby lowering a consumer's desire to purchase.

This is a phenomenon caused by the breakage of the double bond structure of the dye used in detergents, fabric softeners or cosmetic contents for hair as ultraviolet light passes through a transparent or semi-transparent polyethylene container in daylight and loses its function as a dye.

[Technical problem to be achieved]

In order to solve these problems, the present inventors have developed a new type of transparent or translucent polyethylene container, which is transparent or translucent, has a beautiful appearance and excellent recyclability at disposal, and can also prevent discoloration of contents such as detergents due to ultraviolet rays. After many studies and experiments, polyethylene resin was melted and kneaded with 2- (2'-hydroxy-3'-tertbutyl-5'-methylphenyl) -5-chloro-benzotriazole, which absorbs ultraviolet rays. By preparing a transparent or translucent container, the UV blocking ability of the container was improved, and it was found that the discoloration of the contents due to ultraviolet rays could be prevented, thereby completing the present invention.

[Configuration and Function of Invention]

The present invention relates to a container made of polyethylene resin melt-kneaded at a content of 0.1 to 1% by weight of 2- (2'-hydroxy-3'-tertbutyl-5'-methylphenyl) -5-chloro-benzotriazole. will be.

In the case of using 2- (2'-hydroxy-3'-tertbutyl-5'-methylphenyl) -5-chloro-benzotriazole in an amount of 0.1% by weight or less in the present invention, the degree of UV protection required by the present invention is required. It is not possible to exert the effect, and when used in more than 1% by weight does not show a significant difference in the sunscreen effect by increasing the content.

In addition, the container according to the present invention can obtain the effect of preventing the discoloration of the contents to the ultraviolet rays even if the contents of any kind, particularly preferably used as a packaging container for detergents, fabric softeners or hair cosmetics.

When preparing the transparent or translucent polyethylene container of the present invention, a compound or masterbatch of 2- (2'-hydroxy-3'-tertbutyl-5'-methylphenyl) -5-chloro-benzotriazole compound It is preferable to knead and mold in the form of a master batch. The molding method which can be preferably used during molding includes a direct blow molding method or a rotary blow molding method.

As a result of comparing the transparent or translucent polyethylene container according to the present invention with the existing transparent or translucent polyethylene container in terms of UV transmittance, the UV blocking effect of the container according to the present invention is compared at a wavelength of 300 to 380 nm, which is an ultraviolet region in actual daylight. It was found to be significantly superior to the container (see Table 1 and Figure 1).

In addition, the contents of the container and the existing transparent or translucent polyethylene container in the detergent contents storage state after the ultraviolet irradiation in the detergent content storage state, even if the contents stored in the existing container showed a severe discoloration, but according to the present invention Detergent contents stored in the container was almost no discoloration, it can be seen that the container according to the present invention has excellent contents color protection function (see Table 2).

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, these examples are only for illustrating the present invention in detail, and the scope of the present invention in any form is not limited to these examples.

Example 1

Master batch in pellet form by melt kneading 10 (%) 2- (2'-hydroxy-3'-tertbutyl-5'-methylphenyl) -5-chloro-benzotriazole compound in low density polyethylene ) Was prepared.

Example 2

The master batch of Example 1 was melt kneaded in low density polyethylene by 0.5% by weight to prepare a sheet having a thickness of 0.3 mm by the hot press method.

Example 3

The sheet was prepared in the same manner as in Example 2 by melt kneading the master batch of Example 1 in low density polyethylene.

Example 4

The sheet was prepared in the same manner as in Example 2 by melt-kneading the master batch of Example 1 in low density polyethylene by 3 wt%.

Example 5

A sheet was prepared in the same manner as in Example 2 by melt kneading the master batch of Example 1 in low density polyethylene.

Example 6

A sheet was prepared in the same manner as in Example 2 by melt kneading the master batch of Example 1 in low density polyethylene.

Example 7

A sheet was prepared in the same manner as in Example 2 by melt-kneading the master batch of Example 1 in low density polyethylene by 15 wt%.

Example 8

A sheet was prepared in the same manner as in Example 2 by melt kneading 5% by weight of the master batch of Example 1 in 60% by weight of high density polyethylene and 35% by weight of low density polyethylene.

Example 9

The master batch of Example 1 was mixed with low density polyethylene by 0.5 weight%, and the container of 500 ml of volumes and 25 g of resin weights was prepared by the direct blow method.

Example 10

The container was molded in the same manner as in Example 9 by mixing 1 wt% of the master batch of Example 1 in low density polyethylene.

Example 11

The container was molded in the same manner as in Example 9 by mixing 5 wt% of the master batch of Example 1 in low density polyethylene.

Example 12

A container was formed in the same manner as in Example 9 by mixing 5% by weight of the master batch of Example 1 in 60% by weight of high density polyethylene and 35% by weight of low density polyethylene.

Comparative Example 1

The sheet was prepared in the same manner as in Example 2 using only low density polyethylene.

Comparative Example 2

The sheet was prepared in the same manner as in Example 2 using only high density polyethylene.

Comparative Example 3

The container was molded in the same manner as in Example 9 using only low density polyethylene.

[Comparative Example 4]

The container was molded in the same manner as in Example 9 by mixing 60% by weight of high density polyethylene and 40% by weight of low density polyethylene.

Experimental Example 1

UV protection effect comparison

This ultraviolet blocking effect was measured and evaluated by the following method.

Ultraviolet ray blocking powers of Examples 2, 3, 4, 5, 6, 7, 8 and Comparative Examples 1 and 2 were measured by measuring the UV transmittance of each wavelength using a UV spectrometer on a 0.3 mm thick polyethylene sheet. Comparative experiment. The results are shown in Table 1 below. Ultraviolet ray blocking power is evaluated to be excellent as the UV transmittance value shown in Table 1 is lower.

TABLE 1

UV transmittance

As in the results of Table 1, the sheets of Examples 3, 4, 5, 6, 7 and 8 according to the present invention can be seen that the UV blocking ability is much superior to the comparative example.

Experimental Example 2

Content color protection effect

The contents color protection effect against ultraviolet rays of the transparent or translucent container according to the present invention was measured and evaluated by the following method.

Each container of Examples 9, 10, 11, 12 and Comparative Examples 3, 4 was filled with a liquid detergent containing a blue food dye, capped, and visually observed discoloration of the contents after ultraviolet irradiation for 100 hours with an accelerated weathering tester. Comparison was made by measuring with a color difference meter.

Color difference and yellowness were measured by a color difference meter, and the lower the numerical value shown in Table 2, the less discoloration was evaluated.

TABLE 2

Evaluation of Contents Color Protection Effect by UV Irradiation

As shown in Table 2, the contents of the liquid detergent filled in the container according to the present invention are significantly less discolored than the liquid detergent filled in the container of the comparative example, so that the container according to the present invention protects the contents of the contents against UV rays compared to the existing container. It can be seen that the function is excellent.

[Effects of the Invention]

No content.

Claims (4)

A container made of polyethylene resin containing 0.1 to 1% by weight of 2- (2'-hydroxy-3'-tertbutyl-5'-methylphenyl) -5-chloro-benzotriazole. The method of claim 1, wherein the 2- (2'-hydroxy-3'-tertbutyl-5'-methylphenyl) -5-chloro-benzotriazole is mixed with the polyethylene resin in the form of a compound or master batch and molded Container characterized in that the. A method of using the container of claim 1 as a packaging container. The method according to claim 3, which is used as a packaging container for liquid detergents, fabric softeners, and hair cosmetics.