KR102496773B1 - Manufacturing method for a vegetable leather using Cucurbitaceae plant - Google Patents

Abstract

The present invention relates to a method for manufacturing vegetable artificial leather of natural materials having strength and material similar to animal leather using cucurbits and plants. It is possible to provide various leather-related products such as furniture accessories and accessories.

Description

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

The present invention relates to a method for producing vegetable leather using gourds and plants. Preferably, the present invention extracts alcohol-insoluble dietary fiber from the crushing liquid of gourds and plants, dries it, impregnates it with water-based synthetic resin and oil, and dries it, thereby producing vegetable artificial leather of natural material having similar strength and material to animal leather. It's about how to make it.

Along with economic development, the preference and demand for leather are increasing worldwide, but as consumers' moral consumption standards are also increasing, there is also a demand for alternative leather (artificial leather) that does not cause widespread slaughter and environmental destruction in the process of obtaining leather. is rising However, the texture of artificial leather is very different from that of natural leather, so the molding process to meet the consumer's eye level has become more difficult. Since recycling is not possible due to poor quality, it is facing various problems such as serious environmental pollution in the entire process, including disposal as industrial waste. Therefore, it is urgent to develop a manufacturing method for environmentally friendly and ethical leather manufacturing with a new material that can replace natural leather and existing artificial leather.

Cucurbitaceae plants are mainly distributed in the tropics and subtropics, and as annual plants, they are climbing plants, and in Korea, about 70 species, such as melons, watermelons, pumpkins, cucumbers, gourds, and loofahs, are wild or cultivated. Most gourds contain rich dietary fiber and are mostly consumed raw. In addition, young leaves, stems, immature fruits, etc. are consumed for food, but the consumption of other parts other than fruits is insignificant. A huge amount of agricultural by-products, such as harvested stems, leaves, and roots, are generated and become a new cause of environmental pollution, so the development of new treatment methods is required.

Republic of Korea Patent Registration No. 10-2034033 (Title of Invention: Manufacturing method of textile fabric having leather texture using natural fiber fabric and textile fabric having leather texture manufactured thereby, Applicant: Lee Joo-hyun, Registration date: October 14, 2019 Day) Republic of Korea Patent Publication No. 10-2016-0125054 (Title of Invention: Composition of a complex mixture with anti-rust and lubrication functions made of a natural vegetable mixture, Applicant: Hong Seong-taek, Publication date: October 31, 2016)

An object of the present invention is to provide a method for producing vegetable leather using gourds and plants. Preferably, the object of the present invention is to extract alcohol-insoluble dietary fiber from the crushing liquid of gourds and plants, dry it, impregnate it with a mixed solution of water-based synthetic resin and oil, and dry it, thereby obtaining a natural material having strength and material similar to animal leather. It is to provide a method for manufacturing vegetable artificial leather.

(First step) crushing and sterilizing gourd plants;

(Second step) reflux extraction of sterilized Cucurbitaceae plants with C1-C4 alcohol, followed by filtration to obtain the remaining precipitate;

(Third step) first washing the obtained precipitate with a mixed solution of chloroform and C1-C4 alcohol, and then secondarily washing with acetone;

(Fourth step) obtaining a precipitate again after washing with acetone, adding an aqueous solution of dimethyl sulfoxide (DMSO) and stirring;

(Step 5) Molding the precipitate obtained in step 4 into a fabric shape and drying to obtain a leather fabric; and,

(Sixth step) immersing the leather fabric in a mixed solution of water-based synthetic resin and vegetable oil in a volume ratio of 1:9 to 1:10 to infiltrate the water-based synthetic resin and oil into the leather fabric, and then drying;

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

In the first step, the gourd plant is characterized in that melon, cucumber, watermelon, pumpkin, gourd or melon. In the Cucurbitaceae plant, it is preferable to remove the portion containing seeds from the fruit and use only the skin and fruit portion.

The sterilization of the first step is preferably performed at 121 to 130 ° C for 3 to 60 minutes.

The C1-C4 alcohol of the second step or the 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.

The mixed solution of chloroform and C1-C4 alcohol in the third step is preferably a mixture of chloroform and C1-C4 alcohol in a volume ratio of 1:0.5 to 1:2.

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

In the sixth step, the water-based synthetic resin may be selected from water-based urethane resins, water-soluble acrylic resins, and urea resins. The aqueous urethane resin may preferably be a urethane resin aqueous solution 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 if necessary, animal oil such as horse oil may be mixed.

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, the flexibility of the fabric can be increased, the unique gloss and texture of the leather fabric can be imparted, and waterproofness, elasticity of the material, and durability can be improved.

The present invention relates to a method for manufacturing vegetable artificial leather of natural materials having strength and material similar to animal leather using cucurbits and plants. It is possible to provide various 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 to sufficiently convey the spirit of the invention to those skilled in the art, so that the disclosure herein will be thorough and complete.

<Example 1. Preparation of vegetable leather using melon>

After crushing fresh melon with a crusher, it was sterilized at 121 ° C. for 50 minutes using a high-pressure sterilizer. 1000 g of 95% ethanol solution was added to 100 g of sterilized melon lysate, followed by reflux extraction at 78° C. for 60 minutes. After this, the extract was removed by filtration through a Glass filter, and a precipitate was obtained. The obtained precipitate was washed sequentially twice, once with 1000 g of a 1:1 (v:v) mixture of chloroform: methanol and once with 1000 g of acetone, and then washed with 90% (v/v) DMSO (dimethyl sulfoxide) solution was added and stirred for 24 hours, and filtered through a glass filter to obtain a precipitate again.

Thereafter, the obtained precipitate (alcohol insoluble dietary fiber) was injected into a molding mold lined with wax paper to make the surface even and molded, and low-temperature hot air drying between 50 and 60 ° C. was performed for 48 hours to prepare a leather-like fabric. . Wax paper was removed from the prepared vegetable leather fabric, and it was impregnated with rapeseed oil mixed with water-based urethane resin and left for 2 hours to allow the urethane resin to permeate evenly. The urethane resin was PUD-2008 among water-based urethane resins manufactured by Aekyung Chemical Co., Ltd., and PUD-2008 and rapeseed oil were used in 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 to 200 cps, and a pH of 6.0 to 8.5.

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

<Example 2. Preparation of vegetable leather by adjusting the concentration of DMSO solution i>

In the manufacturing process of Example 1, vegetable leather was prepared by adjusting the concentration of DMSO to an 80 (v / v)% aqueous solution.

<Example 3. Preparation of vegetable leather by adjusting the 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>

In the manufacturing process of Example 1, when reflux extraction of ethanol-sterilized melon lysate or washing the precipitate obtained after reflux extraction with a mixture of chloroform and methanol, 1,3-butylene glycol is used instead of ethanol or methanol Vegetable leather was prepared in the same manner as in Example 1 except for that.

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

In the manufacturing process of Example 1, instead of reflux extracting the sterilized melon lysate using ethanol, a 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 a 95% ethanol solution Vegetable leather was prepared in the same manner as in Example 1.

<Comparative Example 3. Preparation of vegetable leather by adjusting the content of water-based urethane resin>

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

<Comparative Example 4. Preparation of vegetable leather by adjusting the type of water-based urethane resin i>

In the manufacturing process of Example 1, as an aqueous urethane resin, Aekyung Chemical Co., Ltd.'s PUD-2630, a urethane resin having a solid content of 40% by weight, a viscosity of 10 to 200 cps, and a pH of 6.0 to 8.5 was mixed with rapeseed oil to obtain Example 1 and Vegetable leather was prepared as follows.

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

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

<Comparative Example 6. Preparation of vegetable leather by adjusting the concentration of DMSO solution i>

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

<Comparative Example 7. Preparation of vegetable leather by adjusting the concentration of DMSO solution i>

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

<Experimental Example 1. Confirmation of Bursting Strength and Tensile Strength of Manufactured Leather>

-The bursting strength is measured by using a bursting tester (MULLEN type bursting strength tester) in accordance with MS 300-31 to prepare specimens with a width of 100mm and a length of 100mm from the artificial leather, and three specimens are taken in each of the horizontal and vertical directions, and then tested on the bursting 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 expressed with the average value of the three samples.

For tensile strength, a tensile tester (Instron, Shimadzu) was used. In accordance with MS 300-31, 5 specimens were taken in each of the horizontal and vertical directions, and a mark line (ℓ) of 100mm was drawn. The maximum weight at which the specimen breaks by tension is obtained.

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 confirming the results of Table 1, it was confirmed that the condition of Example 1 of the present invention is a method for manufacturing vegetable leather of a durable material that can replace animal leather because of good burst strength and tensile strength.

Claims (6)

(First step) crushing and sterilizing gourd plants;
(Second step) reflux extraction of sterilized Cucurbitaceae plants with C1-C4 alcohol, followed by filtration to obtain the remaining precipitate;
(Third step) first washing the obtained precipitate with a mixed solution of chloroform and C1-C4 alcohol, and then secondarily washing with acetone;
(Fourth step) obtaining a precipitate again after washing with acetone, adding an aqueous solution of dimethyl sulfoxide (DMSO) and stirring;
(Step 5) Molding the precipitate obtained in step 4 into a fabric shape and drying to obtain a leather fabric; and,
(Sixth step) immersing the leather fabric in a mixed solution of water-based synthetic resin and vegetable oil in a volume ratio of 1:9 to 1:10 to infiltrate the water-based synthetic resin and oil into the leather fabric, and then drying;
A method for producing vegetable leather comprising a. According to claim 1,
In the first step, the gourd plant is a method for producing vegetable leather, characterized in that melon, cucumber, watermelon, pumpkin, gourd or melon. According to claim 1,
Method for producing vegetable leather, characterized in that the C1 ~ C4 alcohol of the second step or the third step is selected from the group consisting of methanol, ethanol, propanol, isopropanol, butanol and isobutanol. According to claim 1,
In the sixth step, the water-based synthetic resin is a method for producing vegetable leather, characterized in that selected from water-based urethane resin, water-soluble acrylic resin or urea resin. According to claim 4,
The aqueous urethane resin has a solid content of 40 to 60% by weight, a viscosity of 500 to 200 cps, a method for producing vegetable leather, characterized in that the aqueous urethane resin solution having a pH of 6.0 to 8.5. According to claim 1,
In the sixth step, the vegetable oil is 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.

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