KR-20260062787-A - LOW DENSITY SHRINK FILM

Abstract

The present invention relates to a low-density shrink film, and more specifically, as a low-density shrink film, it is characterized by comprising: a pearl film for forming a film for a label used attached to a PET (Polyethylene Terephthalate) bottle; and a shrink film laminated with the pearl film for forming a film for a label used attached to a PET (Polyethylene Terephthalate) bottle. According to the low-density shrink film proposed in the present invention, by comprising a pearl film for forming a label film used to be attached to a PET (Polyethylene Terephthalate) bottle and a shrink film laminated with the pearl film for forming a label film used to be attached to a PET (Polyethylene Terephthalate) bottle, the shrink film and the pearl film are laminated to form a label film used to be attached to a PET bottle, thereby forming a film with a specific gravity less than 1, and after crushing, the laminated single shrink film for the label floats on water while the PET bottle sinks in water, allowing it to be easily separated and used for recycling. In addition, according to the low-density shrink film of the present invention, by laminating a shrink film of PET or PS and a pearl film to form a single shrink film for a label that is less than 1 and used as a label-level film attached to a PET bottle, it is possible to minimize environmental pollution as well as gain economic benefits through increased recycling of PET bottles. In addition, according to the low-density shrink film of the present invention, by laminating a shrink film of PET or PS and a pearl film to form a single shrink film for a label that is less than 1 and used as a label-level film attached to a PET bottle, the process of applying multiple layers of white ink to increase the hiding power in conventional PET shrink films through the use of a pearl film can be minimized.

Inventors

• 임이종

Assignees

• 주식회사 디엘피

Dates

Publication Date

20260507

Application Date

20250321

Priority Date

20241029

Claims (7)

1. As a low-density shrink film (100), A pearl film (110) for forming a film of a label used to be attached to a PET (Polyethylene Terephthalate) bottle; and A low-density shrink film characterized by including a shrink film (120) laminated with a pearl film (110) for forming a film of a label used to be attached to a PET (Polyethylene Terephthalate) bottle.
2. In claim 1, the shrink film (120) is, A low-density shrink film characterized by being composed of a PET shrink film (121) or a PS shrink film (122) laminated with a pearl film (110) for forming a film of a label used to be attached to a PET (Polyethylene Terephthalate) bottle.
3. In paragraph 2, the low-density shrink film (100) is, A low-density shrink film characterized by forming a single shrink film for a label through lamination of the above pearl film (110) and shrink film (120), wherein the specific gravity of the laminated single shrink film for a label is less than 1.
4. In paragraph 3, the low-density shrink film (100) is, A low-density shrink film characterized by forming a single shrink film for a label through lamination of the pearl film (110) and the shrink film (120), wherein the lamination method of the pearl film (110) and the shrink film (120) is configured as a dry lamination method.
5. In any one of claims 1 to 4, the low-density shrink film (100) is, A low-density shrink film characterized by being able to function as a single label shrink film with a specific gravity less than 1 through the lamination of the above pearl film (110) and shrink film (120), so that it does not sink in water but floats, thereby eliminating the inconvenience of having to manually remove the label shrink film from PET bottles one by one when PET bottles are collected and recycled.
6. In paragraph 5, the low-density shrink film (100) is, A low-density shrink film characterized by the fact that, through the lamination of the above pearl film (110) and shrink film (120), a single shrink film for label with a specific gravity less than 1 functions to float without sinking in water, so that during the process of crushing and washing together without the need to remove the shrink film for label from a PET bottle, the shrink film for label, which has a specific gravity lower than water, floats in water, while the PET bottle body itself sinks in water and can be easily separated.
7. In paragraph 5, the low-density shrink film (100) is, A low-density shrink film, comprising a single shrink film for labels with a specific gravity less than 1 through the lamination of the pearl film (110) and the shrink film (120), wherein the pearl film (110) and the shrink film (120) are laminated in a volume ratio such that the specific gravity of the laminated film does not exceed 1 and can float on water.

Description

Low Density Shrink Film The present invention relates to a low-density shrink film, and more specifically, to a label-level film used to be attached to PET bottles, wherein a PET or PS shrink film and a pearl film are laminated to form a film with a specific gravity less than 1, and after crushing, the laminated single label shrink film floats on water while the PET bottle sinks in water, allowing for easy separation and use for recycling. The content described in this section merely provides background information regarding an embodiment of the present invention and does not constitute prior art. Generally, PET (polyethylene terephthalate) has been used in various fields such as clothing, packaging containers, home appliances, automobiles, and films due to its excellent durability, processability, and thermal stability. However, because it is not biodegradable, the disposal of waste PET is difficult, and serious environmental pollution problems arise during landfill or incineration processes. Accordingly, technologies for recycling waste PET are attracting attention to address environmental pollution and rising costs resulting from the depletion of petroleum resources. Generally, PET shrink film printed with product features, descriptions, manufacturers, and trademarks is used on the outer surface of packaging containers, including beverage containers. This PET shrink film is utilized as a wrapping material for packaging containers by taking advantage of its property of shrinking upon heating, serving as various packaging materials or labels. As such, PET shrink film is generally used as a label attached to PET bottles, but since its specific gravity is 1.32, which is greater than 1, it sinks in water. For this reason, when PET bottles are collected and recycled, the label shrink film must be removed from the PET bottles one by one by hand. If the label shrink film is not removed and the bottles are recycled together with the PET bottle raw material, the entire material becomes contaminated due to the color of the ink applied to the PET shrink film, making recycling difficult. Korean Registered Patent Publication No. 10-1708298 is disclosed as a prior art document. The aforementioned background technology is technical information that the inventor possessed for the derivation of the present invention or acquired during the process of deriving the present invention, and it cannot be considered as publicly known technology disclosed to the general public prior to the filing of the present invention. FIG. 1 is a diagram illustrating the configuration of a low-density shrink film according to an embodiment of the present invention as functional blocks. FIG. 2 is a diagram illustrating the configuration of a shrink film provided in a low-density shrink film according to an embodiment of the present invention as a functional block. FIG. 3 is a drawing showing a perspective view configuration of a low-density shrink film according to an embodiment of the present invention. FIG. 4 is a diagram illustrating the configuration of a PET bottle with a conventional PET shrink film attached for comparing the hiding power with a low-density shrink film according to an embodiment of the present invention. FIG. 5 is a drawing illustrating the configuration of a PET bottle with a low-density shrink film attached according to an embodiment of the present invention. FIG. 6 is a drawing illustrating a comparison of the hiding power of a low-density shrink film according to an embodiment of the present invention and a conventional PET shrink film. FIG. 7 is a drawing showing the front view configuration of a PET bottle for comparing the specific gravity of a low-specific gravity shrink film according to an embodiment of the present invention and a conventional PET shrink film. FIG. 8 is a plan view of a PET bottle for comparing the specific gravity of a low-specific gravity shrink film according to an embodiment of the present invention and a conventional PET shrink film. Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals. Throughout the specification, when a part is described as being "connected" to another part, this includes not only cases where they are "directly connected" but also cases where they are "indirectly connected" with other elements interposed between them. Furthermore, when a part is described as "including" a component, this means that, unless specifically stated otherwise, it does not exclude other components but rather allows for the inclusion of ad