BIOPLASTIC FILM, BUBBLE FILM, AND BUBBLE FILM PRODUCT USING SAME

Abstract

The present application relates to: a bioplastic film comprising wheat husk which is a food by-product; a bubble film; and a bubble film product using the same.

Claims

1. A bioplastic film comprising a first polyolefin-based resin, a wheat bran-containing composition, and a desiccant.

2. The bioplastic film of claim 1, wherein the first polyolefin-based resin is one or more selected from polyethylene (PE), polypropylene (PP), polybutylene, and polymethylpentene.

3. The bioplastic film of claim 1, wherein the first polyolefin-based resin is comprised in an amount of 85% by weight to 95% by weight based on the total weight of the bioplastic film.

4. The bioplastic film of claim 1, wherein the wheat bran-containing composition is comprised in an amount of 2% by weight to 8% by weight based on the total weight of the bioplastic film.

5. The bioplastic film of claim 1, wherein the wheat bran-containing composition comprises a second polyolefin-based resin, wheat bran, a wax, an inorganic filler, and a surfactant.

6. The bioplastic film of claim 6, wherein the wheat bran has a size of 5 m to 30 m and a polydispersity index (PDI) of 2 or less, and is comprised in an amount of 10% by weight to 30% by weight based on the total weight of the wheat bran-containing composition.

7. The bioplastic film of claim 1, wherein the desiccant is one or more selected from zeolite, silica gel, and activated alumina.

8. The bioplastic film of claim 1, wherein the desiccant is comprised in an amount of 3% by weight to 8% by weight based on the total weight of the bioplastic film.

9. A bubble film comprising the bioplastic film of claim 1.

10. A bubble film product which is a laminate of the bubble film of claim 9 and a subsidiary material.

11. The bubble film product of claim 10, wherein the subsidiary material is one or more selected from paper, a film, a foam, and a non-woven fabric.

12. The bubble film product of claim 10, wherein the bubble film product is used in a packaging material, a wallpaper, a floor material, a mat, a heat insulating cover, an interior material, a sculpture, or clothing.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0041] FIG. 1 is a flowchart illustrating a process of manufacturing a bioplastic film and a bubble film of the present disclosure;

[0042] FIG. 2 is a photograph of comparing the bubble film of the present disclosure (left) with a conventional bubble film made of polyethylene (right);

[0043] FIG. 3 is a cross-sectional view of a bubble film product of the present disclosure;

[0044] FIG. 4 is an example of the bubble film product of the present disclosure, the bubble film product being manufactured in the form of a hanger-type suitcase;

[0045] FIG. 5 illustrates a process of manufacturing the bubble film product of the present disclosure;

[0046] FIG. 6 illustrates a comparison between a cross-section of a single cap and a cross-section of a double cap; and

[0047] FIGS. 7A to 7D show photographs of bubble film products of Examples 7 to 10, in which FIG. 7A shows a bubble film product manufactured using polyethylene-coated Kraft paper as a subsidiary material, FIG. 7B shows a bubble film product manufactured using polyethylene-coated traditional Korean paper as a subsidiary material, FIG. 7C shows a bubble film product manufactured using a printed film as a subsidiary material, and FIG. 7D shows a bubble film product manufactured using a foam as a subsidiary material.

MODE OF DISCLOSURE

[0048] Hereinafter, the present disclosure will be described in more detail with reference to the following Examples. Examples are given in terms of an embodiment of the present disclosure and not construed to limit the scope of the present disclosure.

EXAMPLE

1. Examples 1 and 2: Preparation of Wheat Bran-Containing Compositions

[0049] Wheat bran was automatically dried in an ACM grinding machine with a blade motor controlled at 100 RPM to 200 RPM to a water content of 7% or below, and the grinded particles were sized-sorted to yield a powder of 15 m and PDI=1. 15% by weight of the wheat bran powder of 15 m and PDI=1 was mixed under heat with 60% by weight of pellet or power-type polyethylene (PE), 10% by weight of calcium carbonate as a filler, 14% by weight of wax (6% by weight of LDPE and 8% by weight of HDPE), and 1% by weight of a surfactant while the temperature was controlled at 160 C.200 C. not to burn the wheat bran, thereby preparing a wheat bran-containing composition of Example 1.

[0050] Further, a wheat bran-containing composition of Example 2 was prepared in the same manner as in Example 1, except that 25% by weight of wheat bran and 50% by weight of pellet or power-type polyethylene (PE) were used.

2. Examples 3 and 4: Manufacture of Desiccant-Containing Bioplastic Films

[0051] 25% by weight of pellets which were prepared using the wheat bran-containing composition of Example 2 and 70% by weight of polyethylene (60% by weight of LLDPE and 10% by weight of LDPE) were mixed, and further mixed with 5% by weight of a desiccant based on the total weight of the mixture, and film molding was performed to manufacture a bioplastic film of Example 3.

[0052] A bioplastic film of Example 4 was manufactured in the same manner as in the bioplastic film of Example 3, except that mixing and film molding were performed without the desiccant.

3. Experimental Example 1: Comparison of Physical Properties of Desiccant-Containing Bioplastic Films

[0053] In order to examine applicability of bioplastic films having different desiccant contents to bubble films, their sealing strength and puncture strength were examined and results are shown in Table 1 below.

TABLE-US-00001 TABLE 1 Comparison of physical properties of bioplastic films according to content of desiccant Example 3 Example 4 Content of desiccant 5% by weight 0 Sealing strength (kgf) 0.8936 0.9832 Puncture strength (kfg) 0.15 0.1618

[0054] As shown in Table 1, the bioplastic film containing 5% by weight of the desiccant showed 9% reduction in sealing strength and 7.3% reduction in puncture strength, as compared with the bioplastic film containing no desiccant. However, the bioplastic film containing the desiccant of the present disclosure showed physical properties which are suitable enough to be manufactured and used as a bubble film. Thus, it was confirmed to provide a bubble film having carbon reduction and controlling the environment inside packaging materials.

4. Examples 5 and 6: Manufacture of Bubble Films

[0055] While the bioplastic film of Example 3 or 4 was passed through a molding roll, the bioplastic film was adhered to another bioplastic film to form a bubble film, and then cooled, thereby manufacturing a bubble film of Example 5 or 6, respectively.

5. Comparative Example 1: Manufacture of Existing Petroleum-Derived Bubble Films

[0056] A bubble film was manufactured in the same manner as in Example 5, after manufacturing a film by mixing 95% by weight of polyethylene and 5% by weight of the desiccant without the wheat bran-containing composition.

6. Experimental Example 3: Comparison of Physical Properties Between Existing Bubble Film and Bubble Film of the Present Disclosure

[0057] In order to examine whether the bubble film of the present disclosure may replace the existing petroleum-derived bubble films, sealing strength and pressure-resistant strength of the bubble films of Examples 5 and 6 and Comparative Example 1 were measured, and results are shown in Table 3.

TABLE-US-00002 TABLE 2 Comparison of Physical Properties between existing bubble film and bubble films of the present disclosure Comparative Example 1 Example 5 Example 6 Sealing strength (kgf) 2.065 1.721 1.564 Pressure-resistant strength (Mpa) 0.068 0.063 0.059

[0058] Sealing strength and pressure-resistant strength of the bubble films of the present disclosure were rather reduced, as compared with those of Comparative Example 1 which is the existing petroleum-derived plastic film, but the bubble films were confirmed to have the physical properties within the range applicable to bubble films.

7. Examples 7 to 10: Manufacture of Bubble Films Products

[0059] The bubble film of Example 5 was laminated with an adhesive material and a subsidiary material to manufacture a bubble film product. Specifically, thermal lamination was performed using polyethylene-coated Kraft paper or polyethylene-coated traditional Korean paper as the subsidiary material to manufacture a bubble film product of Example 7 or 8, respectively (FIGS. 7A and 7B). Dry lamination was performed using a printed film as the subsidiary material to manufacture a bubble film product of Example 9 (FIG. 7C). Cold lamination was performed using a foam as the subsidiary material to manufacture a bubble film product of Example 10 (FIG. 7D).

[0060] It was confirmed that the bubble film products of Examples 7 to 10 may be manufactured at a cost of 5% to 40% lower than that of an existing non-woven fabric suitcase, and the bubble film products may maintain a packaging shape via bubble films and may absorb impact generated during distribution.

REFERENCE NUMERALS

[0061] 100: Bubble film product [0062] 110: Bubble film [0063] 111: First bioplastic film [0064] 112: Second bioplastic film [0065] 120: Adhesive layer [0066] 130: Subsidiary material