KR-20260066334-A - Biodegradable Polymer Resin Composition and Biodegradable Film Containing the Same

Abstract

The present invention relates to a biodegradable polymer resin composition and a biodegradable film comprising the same. One embodiment relates to a resin composition comprising modified cellulose acetate butyrate (CAB), a plasticizer, and polybutylene adipate terephthalate (PBAT), which is a biodegradable polymer, and a technology for manufacturing a high-strength film using the same. A biodegradable polymer resin composition according to an embodiment of the present invention comprises modified cellulose acetate butyrate, modified cellulose acetate butyrate containing a plasticizer, and PBAT (Polybutylene Adipate Terephthalate).

Inventors

• 안성훈

Assignees

• 주식회사그린패키지솔루션

Dates

Publication Date

20260512

Application Date

20241104

Claims (5)

1. Comprising modified cellulose acetate butyrate, modified cellulose acetate butyrate containing a plasticizer, and PBAT (Polybutylene Adipate Terephthalate), Biodegradable polymer resin composition.
2. In paragraph 1, The above modified cellulose acetate butyrate is CAB 381-20, and Modified cellulose acetate butyrate containing the above plasticizer is CAB 264-10, Biodegradable polymer resin composition.
3. In paragraph 1, The content ratio of the modified cellulose acetate butyrate and the modified cellulose acetate butyrate containing the plasticizer is 1:0.9 to 1:1.1 based on weight, Biodegradable polymer resin composition.
4. In paragraph 1, The content ratio of the sum of the modified cellulose acetate butyrate and the modified cellulose acetate butyrate containing a plasticizer to the PBAT is 1:8.5 to 1:9.5 based on weight, Biodegradable polymer resin composition.
5. A biodegradable film comprising the biodegradable polymer resin composition of claim 1.

Description

Biodegradable Polymer Resin Composition and Biodegradable Film Containing the Same The present invention relates to a biodegradable polymer resin composition and a biodegradable film comprising the same. One embodiment relates to a resin composition comprising modified cellulose acetate butyrate (CAB), a plasticizer, and polybutylene adipate terephthalate (PBAT), which is a biodegradable polymer, and a technology for manufacturing a high-strength film using the same. Biodegradable polymer film technology focuses on developing sustainable materials to address environmental issues. Biodegradable polymer films are based on biodegradable polymers such as polylactide (PLA) and polybutylene adipate terephthalate (PBAT) and possess the characteristic of decomposing by microorganisms in the natural environment. In particular, PLA is widely used in food packaging and disposable products due to its excellent hardness and heat resistance. On the other hand, PBAT is frequently used as a film or packaging material due to its superior flexibility and high tensile strength. However, conventional biodegradable films have low mechanical strength and lack flexibility, which limits their application. Figures 1 to 3 are photographs of products manufactured through Examples 1 to 3, respectively. Preferred embodiments of the present invention are described below. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. A biodegradable polymer resin composition according to an embodiment of the present invention comprises modified cellulose acetate butyrate, modified cellulose acetate butyrate containing a plasticizer, and PBAT (Polybutylene Adipate Terephthalate). The above-mentioned modified cellulose acetate butyrate (Modified CAB) is a polymer material modified by replacing the hydroxyl groups of cellulose with acetate and butyrate groups. In the present invention, by using modified cellulose acetate butyrate, heat resistance, chemical resistance, transparency, and flexibility of the film can be improved compared to when conventional cellulose is used. The above modified cellulose acetate butyrate may be CAB 381-20, CAB-531-1, CAB-381-0.1, CAB-551-0.01, etc. Among these, CAB 381-20 is more preferred as it has excellent mechanical strength, thermal stability, and chemical resistance. The above CAB 381-20 is a form in which the hydroxyl groups of cellulose are substituted with acetate and butyrate groups. This improves physical properties, making it more flexible and easier to process than the original properties of cellulose. The above CAB 381-20 has a butyryl content of approximately 17–20%, providing flexibility while maintaining durability and strength. This can serve as an important factor in film manufacturing. In addition, it has a high glass transition temperature (105 to 115 ℃), resulting in excellent stability at high temperatures. The content of the modified cellulose acetate butyrate may be 2 to 7 weight%, preferably 4 to 6 weight%, based on the total weight of the biodegradable polymer resin composition. If the content of the modified cellulose acetate butyrate is too high, flexibility decreases, making it difficult to form into a film, and if the content is too low, there is no effect of improving mechanical properties. The modified cellulose acetate butyrate containing the above plasticizer is a polymer material modified by replacing the hydroxyl groups of cellulose with acetate and butyrate groups and additionally adding a plasticizer. In the present invention, the modified cellulose acetate butyrate containing the above plasticizer improves heat resistance and chemical resistance, and can significantly improve the flexibility and processability of the film due to the effect of the plasticizer. The modified cellulose acetate butyrate containing the above plasticizer may be CAB 264-10, CAB-553-0.4, etc. Among these, CAB-264-10 is more preferable as it has excellent flexibility and processability, making it suitable for manufacturing into a film shape. The above CAB 264-10 is a form in which the hydroxyl groups of cellulose are substituted with acetate and butyrate groups, but additionally contains a plasticizer, which can provide higher flexibility and moldability during film manufacturing. The plasticizer in the above CAB 264-10 can increase the elongation of the film and contribute to preventing cracks or breakage that may occur during processing. The content of the modified cellulose acetate butyrate containing the above plasticizer may be 2 to 7 weight%, preferably 4 to 6 weight%, based on the total weight of the biodegradable polymer resin composition. If the content of the modified cellulose acetate butyrate containing the above plasticizer is too high, the