KR20220065345A - Manufacturing method for a vegetable leather using Cucurbitaceae plant - Google Patents

Abstract

The present invention relates to a method for manufacturing vegetable alternative leather, which is made of natural materials and which has similar strength and quality to animal leather, using the Cucurbitaceae family plants. According to the present invention, it is possible to provide various leather-related products such as bags, automobile interior materials, furnishing small items, and accessories by utilizing the Cucurbitaceae family plants with low quality grades, including Cucumis melo var. makuwa.

Description

Method for manufacturing vegetable leather using Cucurbitaceae plant {Manufacturing method for a vegetable leather using Cucurbitaceae plant}

The present invention relates to a method for producing vegetable leather using a gourd plant. Preferably, the present invention extracts alcohol-insoluble dietary fiber from the crushed liquid of the gourd and dried it, then impregnates it with an aqueous synthetic resin and oil, and dries it, thereby producing artificial vegetable leather of a natural material having strength and material similar to that of animal leather. It relates to a manufacturing method.

Although the preference and demand for leather is increasing worldwide along with economic development, as consumers' interest in moral consumption is also increasing, the demand for alternative leather (artificial leather) without extensive slaughter and environmental destruction in the process of obtaining leather also increases. is rising However, as the texture of artificial leather is different from that of natural leather, the molding process to meet the consumer's eye level becomes more difficult. Because recycling is not possible because of poor performance, serious environmental pollution occurs throughout the entire process, from disposal as industrial waste, to various problems. Accordingly, there is an urgent need to develop a manufacturing method for environmentally and ethical leather manufacturing with new materials that can replace natural leather and existing artificial leather.

Cucurbitaceae is mainly distributed in the tropics and subtropics and is an annual plant, a creeping plant. In Korea, representative melon, watermelon, pumpkin, cucumber, gourd, and loofah, etc. 70 species are wild or cultivated in Korea. Most gourds are rich in dietary fiber, and most are consumed as raw fruits. In addition, young leaves, stems, and unripe fruits are also consumed for food, but consumption of other parts is only marginal. Agricultural by-products from harvesting the remaining stems, leaves, and roots are generated enormously, becoming a cause of new environmental pollution, and the development of new treatment methods is required.

Republic of Korea Patent Registration No. 10-2034033 (Title of the invention: Manufacturing method of textile fabric with leather texture using natural fiber fabric and textile fabric with leather texture manufactured thereby, Applicant: Lee Joo-hyun, Registration date: October 14, 2019 One) Republic of Korea Patent Laid-Open Patent No. 10-2016-0125054 (Title of the invention: Composite mixture with anti-rust and lubricating function made of natural vegetable mixture, Applicant: Hong Seong-taek, Publication date: October 31, 2016)

An object of the present invention is to provide a method for manufacturing a vegetable leather using a gourd plant. Preferably, an object of the present invention is to extract alcohol-insoluble dietary fiber from the crushed liquid of gourd and dry it, then impregnate it in a mixed solution of aqueous synthetic resin and oil and dry it, a natural material having strength and material similar to that of animal hide An object of the present invention is to provide a method for manufacturing artificial vegetable leather.

(Step 1) sterilizing by crushing the gourd;

(Second step) filtering the sterilized gourd plant under reflux with C1~C4 alcohol to obtain the remaining precipitate;

(Step 3) The obtained precipitate is first washed with a mixed solution of chloroform and C1-C4 alcohol, followed by second washing with acetone;

(Step 4) After washing with acetone, an aqueous solution of DMSO (dimethyl sulfoxide) was added and stirred to obtain a precipitate again;

(5th step) obtaining a leather fabric by molding the precipitate obtained in the fourth step into a fabric form and drying; and,

(Sixth step) immersing the leather fabric in a solution in which an aqueous synthetic resin and vegetable oil are mixed in a volume ratio of 1:9 to 1:10, allowing the aqueous synthetic resin and oil to penetrate into the leather fabric, followed by drying;

It relates to a method for producing a vegetable leather comprising a.

In the first step, the gourd plant is melon, cucumber, watermelon, pumpkin, gourd or melon. It is preferable to remove the seed-containing part from the fruit of the Cucurbitaceae plant, and use only the peel and pulp part.

Sterilization of the first step is preferably performed at 121 ~ 130 ℃ 3 ~ 60 minutes.

The C1-C4 alcohol in the second or third step may be selected from the group consisting of methanol, ethanol, propanol, isopropanol, butanol and isobutanol. In addition, it is preferable to use ethanol in the second step and methanol in the third step.

As the mixed solution of chloroform and C1-C4 alcohol in the third step, it is preferable to use a mixture of chloroform and C1-C4 alcohol in a volume ratio of 1:0.5 to 1:2.

As the aqueous solution of DMSO in the fourth step, it is preferable to use 80 to 90 (v/v)% DMSO aqueous solution.

In the sixth step, the aqueous synthetic resin may be selected from an aqueous urethane resin, a water-soluble acrylic resin, and a urea resin. The aqueous urethane resin may preferably be an aqueous solution of a urethane resin having a solid content of 45 to 55% by weight, a viscosity of 500 to 200 cps, and a pH of 6.0 to 8.5.

In the sixth step, the vegetable oil may be selected from corn oil, soybean oil, rapeseed oil, avocado oil, sunflower seed oil, palm oil, brown rice oil, grape seed oil or rice bran oil, and animal oils such as horse oil may be mixed as needed.

The immersion time of the sixth step is preferably 2 to 4 hours.

Through the immersion process of the water-based synthetic resin and oil in the sixth step, it is possible to increase the flexibility of the fabric, give the leather fabric unique luster and texture, and increase the waterproofness, elasticity of the material, and durability.

The present invention relates to a method for manufacturing a natural vegetable artificial leather having a strength and material similar to that of animal leather using a Cucurbitaceae plant, and it uses a Cucurbitaceae plant such as a melon that has received a low quality grade for a bag, an automobile interior material, It is possible to provide a variety of leather-related products such as furniture accessories and accessories.

1 is a photograph of vegetable leather prepared by the method of Example 1 of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, it is provided so that this disclosure will be thorough and complete, and will fully convey the spirit of the invention to those skilled in the art.

<Example 1. Preparation of vegetable leather using melon>

Fresh melon fruits were crushed with a crusher and then sterilized at 121° C. for 50 minutes using an autoclave. 1000g of 95% ethanol solution was added to 100g of sterilized melon lysate, followed by reflux extraction at 78°C for 60 minutes. After that, the extract was removed by filtration through a glass filter, and a precipitate was obtained. The resulting precipitate was sequentially washed twice in total with 1000 g of a 1:1 (v:v) mixture of chloroform: methanol, once with 1000 g of acetone, and then 90% (v/v) DMSO (dimethyl sulfoxide) aqueous solution was added, stirred for 24 hours, and filtered through a glass filter to obtain a precipitate again.

After that, the obtained precipitate (alcohol-insoluble dietary fiber) was injected into a molding die lined with wax paper to make the surface even and molded, followed by low-temperature hot air drying between 50 and 60° C. for 48 hours to prepare a fabric having a leather shape. . The wax paper was removed from the prepared vegetable leather fabric and impregnated in rapeseed oil mixed with an aqueous urethane resin and left for 2 hours to allow the urethane resin to permeate evenly. The urethane resin was PUD-2008 among the aqueous urethane resins of Aekyung Chemical Co., Ltd., and was prepared so that PUD-2008 and rapeseed oil had a weight ratio of 1:9. * PUD-2008: A water-based polyurethane resin with a solid content of 50% by weight, a viscosity of 500-200 cps, and a pH of 6.0-8.5.

Thereafter, the vegetable leather fabric impregnated with the oil was taken out and dried at room temperature for about 7 days to finally prepare vegetable leather.

<Example 2. Preparation of vegetable leather with controlled concentration of DMSO solution i>

In the manufacturing process of Example 1, the concentration of DMSO was adjusted to be 80 (v/v)% aqueous solution to prepare vegetable leather.

<Example 3. Preparation of vegetable leather with controlled concentration of DMSO solution i>

When the leather fabric was immersed in the mixed oil in the manufacturing process of Example 1, vegetable leather was prepared using a solution in which PUD-2008 and rapeseed oil were mixed in a volume ratio of 1:10.

<Comparative Example 1. Preparation of vegetable leather using 1,3-butylene glycol instead of ethanol and methanol>

When reflux extraction of the melon crushed liquid sterilized in ethanol in the manufacturing process of Example 1 or washing the precipitate obtained after reflux extraction with a mixture of chloroform and methanol, 1,3-butylene glycol is used instead of the ethanol or methanol Except that, vegetable leather was prepared in the same manner as in Example 1.

<Comparative Example 2. Preparation of vegetable leather using order of ethanol and DMSO>

In the manufacturing process of Example 1, instead of refluxing the sterilized melon lysate using ethanol, the precipitate was obtained after placing it in DMSO at room temperature at 25° C. for the same time, and after washing with acetone, except for reacting with 95% ethanol solution Vegetable leather was prepared in the same manner as in Example 1.

<Comparative Example 3. Preparation of vegetable leather with controlled content of aqueous urethane resin>

In the manufacturing process of Example 1, PUD-2008 was used as the aqueous urethane resin, but the leather fabric was impregnated with a solution prepared so that PUD-2008 and rapeseed oil were in a weight ratio of 1:11 to prepare vegetable leather as in Example 1. .

<Comparative Example 4. Preparation of vegetable leather with controlled type of water-based urethane resin i>

In the manufacturing process of Example 1, as a water-based urethane resin, PUD-2630 of Aekyung Chemical Co., Ltd. has a solid content of 40% by weight, a viscosity of 10 to 200 cps, and a urethane resin having a pH of 6.0 to 8.5 mixed with rapeseed oil in Example 1 Similarly, vegetable leather was prepared.

<Comparative Example 5. Preparation of vegetable leather by controlling the type of water-based urethane resin ii>

As an aqueous urethane resin, PUD-2017 of Aekyung Chemical Co., Ltd. has a solid content of 60% by weight, and a urethane resin having a viscosity of 0 to 200 cps and a pH of 6.0 to 8.5 is mixed with rapeseed oil to prepare vegetable leather as in Example 1.

<Comparative Example 6. Preparation of vegetable leather with controlled concentration of DMSO solution i>

In the manufacturing process of Example 1, a vegetable leather was prepared by using a DMSO stock solution without addition of water instead of an aqueous DMSO solution.

<Comparative Example 7. Preparation of vegetable leather with controlled concentration of DMSO solution i>

In the manufacturing process of Example 1, the concentration of DMSO was adjusted to be 70 (v/v)% aqueous solution to prepare vegetable leather.

<Experimental Example 1. Confirmation of burst strength and tensile strength of the manufactured leather>

-In accordance with MS 300-31, a rupture tester (MULLEN-type rupture strength tester) is used to prepare a specimen of the artificial leather with a width of 100mm and a length of 100mm, and three samples are collected in each of the horizontal and vertical directions and subjected to a rupture tester. Mount with the film side down and apply pressure. At this time, it is expressed as the pressure when the rubber diaphragm breaks through the test piece, and the result is shown with the average value of three specimens.

For tensile strength, a tensile tester (Instron, Shimadzu) was used, and according to MS 300-31, 5 specimens were taken in each of the horizontal and vertical directions, a mark line (ℓ) was drawn 100mm, and then bitten by the testing machine to 200mm/min. Obtain the maximum weight when the specimen breaks through tension.

burst strength
(kgf/mm ² ) Tensile strength length (L, length) (kgf/30mm) Tensile strength Width (W, Width) (kgf/30mm) (w) Example 1 20 26 32 Example 2 21 25 31 Example 3 21 27 30 Comparative Example 1 14 18 26 Comparative Example 2 12 17 25 Comparative Example 3 12 16 27 Comparative Example 4 15 18 26 Comparative Example 5 12 14 24 Comparative Example 6 15 15 21 Comparative Example 7 14 15 25

When the results of Table 1 were confirmed, it was confirmed that the conditions of Example 1 of the present invention were a method for producing a vegetable leather of a strong material that can replace animal skin because of good burst strength and tensile strength.

Claims (6)

(Step 1) sterilizing by crushing the gourd;
(Second step) reflux extraction of the sterilized gourd with C1-C4 alcohol, followed by filtration to obtain the remaining precipitate;
(Step 3) The obtained precipitate is first washed with a mixed solution of chloroform and C1-C4 alcohol, followed by second washing with acetone;
(Step 4) After washing with acetone, adding an aqueous solution of DMSO (dimethyl sulfoxide) and stirring to obtain a precipitate again;
(5th step) obtaining a leather fabric by molding the precipitate obtained in the fourth step into a fabric form and drying; and,
(Sixth step) immersing the leather fabric in a solution in which an aqueous synthetic resin and vegetable oil are mixed in a volume ratio of 1:8 to 1:10, allowing the aqueous synthetic resin and oil to penetrate into the leather fabric, followed by drying;
A method for producing a vegetable leather comprising a. According to claim 1,
In the first step, the gourd is melon, cucumber, watermelon, pumpkin, gourd or melon. According to claim 1,
C1-C4 alcohol of the second step or third step is a method for producing vegetable leather, characterized in that selected from the group consisting of methanol, ethanol, propanol, isopropanol, butanol and isobutanol. According to claim 1,
In the sixth step, the aqueous synthetic resin is a method for producing vegetable leather, characterized in that it is selected from an aqueous urethane resin, a water-soluble acrylic resin, or a urea resin. 5. The method of claim 4,
The method for producing vegetable leather, characterized in that the aqueous urethane resin is an aqueous solution of a urethane resin having a solid content of 40 to 60% by weight, a viscosity of 500 to 200 cps, and a pH of 6.0 to 8.5. According to claim 1,
In the sixth step, the vegetable oil is corn oil, soybean oil, rapeseed oil, perilla oil, sesame oil, avocado oil, sunflower seed oil, palm oil, brown rice oil, grape seed oil or rice bran oil.

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