# US 2022/0264902 A1 · Preparation Method for Humic Acid Type Fruit Bagging-free Film Agent and Application thereof

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- Number: US 2022/0264902 A1
- Document ID: US20220264902A1
- Status: Published application
- Kind: A1
- Application number: 17/564,709
- Filed: 2021-12-29
- Published: 2022-08-25
- Earliest claimed: 2021-02-25
- Assignees: Shaanxi University of Science and Technology
- Applicants: Shaanxi University of Science & Technology
- Inventors: Yuhua Niu; Long Li; Jie Song; Yonghui Sun; Liangxian Huang; Yuying Han; Wenchao Wang
- Web page: https://patentgrep.com/patent/US20220264902A1

## CPC

- A23B 7/16: Coating with a protective layer; Compositions or apparatus therefor (A23B7/08 takes precedence)
- C09D 105/04: Alginic acid; Derivatives thereof
- A23B: PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)

## Abstract

A humic acid type fruit bagging-free film agent and an application thereof are provided. The humic acid type fruit bagging-free film agent is prepared by: dissolving sodium alginate into water, adding TWEEN-20 and SPAN-20 after stirring evenly, and stirring for mixing to form sodium alginate solution; dissolving humic acid potassium into water, adding glycerin then mixing to form humic acid potassium solution; stirring the sodium alginate solution and the humic acid potassium solution evenly to form agent A; and dissolving calcium chloride into water to obtain agent B. When in use, the agent A is sprayed onto a fruit surface, and then agent B is sprayed. It can not only be antibacterial, anti- freezing and pest-resistant, but also shorten film-forming duration and have better film-forming property. Shading performance is improved, and problems of rough fruit surface, serious rust and dim color caused by using paper bagging can be solved.

## Claims

### Claim 1

A humic acid type fruit bagging-free film agent, comprising: an agent A and an agent B, wherein the agent A is configured to be sprayed onto a fruit surface, and then the agent B is configured to be sprayed immediately after the agent A is sprayed to form a humic acid type fruit bagging-free film on the fruit surface;
wherein the agent A is prepared by the following steps:
(1) dissolving sodium alginate into water, stifling evenly, then adding TWEEN-20 and SPAN-20, and stifling for mixing to form a sodium alginate solution; wherein a mass ratio of the sodium alginate: the water: the TWEEN-20: the SPAN-20 is (5˜8): (60˜65): (0.5˜0.8): (0.5˜0.8);
(2) dissolving humic acid potassium into water completely, adding glycerin, then mixing completely and evenly to form a humic acid potassium solution; wherein a mass ratio of the humic acid potassium: the water: the glycerin is (0.3˜0.5): (35˜40): (1˜1.2); and
(3) stifling the sodium alginate solution prepared by the step (1) and the humic acid potassium solution prepared by the step (2) fully until they become a homogeneous system, thereby forming the agent A; wherein a volume ratio of the sodium alginate solution prepared in the step (1) to the humic acid potassium solution prepared in the step (2) is 1:1;
wherein the agent B is a calcium chloride solution.

### Claim 2 (depends on 1)

The humic acid type fruit bagging-free film agent according to claim 1, wherein a mass concentration of calcium chloride in the agent B is (1.5˜2) %.

### Claim 3 (depends on 1)

An application method of the humic acid type fruit bagging-free film agent according to claim 1, wherein the humic acid type fruit bagging-free film agent is applied to a fruit surface;
wherein when in use, spraying the agent A onto the fruit surface and then spraying the agent B, thereby forming a humic acid type fruit bagging-free film on the fruit surface.

### Claim 4

(canceled)

### Claim 5 (depends on 3)

The application method according to claim 3, wherein a film-forming duration of the humic acid type fruit bagging-free film is 5-10 seconds (s) after spraying the agent A and the agent B.