CN113699284B

CN113699284B - Manufacturing method for changing environment-friendly Argentina leather embryo wax into imitation hippophae leather

Info

Publication number: CN113699284B
Application number: CN202111008686.5A
Authority: CN
Inventors: 王良清; ***
Original assignee: Feng'an Leather Co ltd
Current assignee: Feng'an Leather Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-04-29
Anticipated expiration: 2041-08-31
Also published as: CN113699284A

Abstract

The invention relates to the technical field of leather, and provides a method for preparing environment-friendly Argentina leather embryo wax into imitation hippophae leather, which takes Argentina blue leather as a raw material and is treated by the following procedures: wringing, shaving → rewetting, detinning → primary neutralization → pre-filling → standing → primary fixing → secondary neutralization → filling → fatliquoring → secondary fixing → topping → wax fixation → after finishing. The prepared leather has fine and smooth leather surface, thick and solid texture and transparent surface, can replace the effect of the hippophae rhamnoides skin, solves the problem that the demand of common consumers on high-grade leather is difficult to meet due to high price and limited quantity of the hippophae rhamnoides skin, improves the added value of the blue leather, and has remarkable economic benefit.

Description

Manufacturing method for changing environment-friendly Argentina leather embryo wax into imitation hippophae leather

Technical Field

The invention relates to the technical field of leather, in particular to a method for manufacturing an environment-friendly Argentina leather embryo wax into a simulated hippophae leather.

Background

The skin of the buttocks of the equine is very thick, the fiber density is high, the area of the buttocks is only one eighth of the area of the buttocks, and the leather made by the parts is the skin of the buttocks of the equine. The hippophae skin is also called Cordovan leather (Cordovan), has almost no sweat pores on the surface, and has the texture like the skin of a baby; the texture is particularly fine and elastic, and the scratch is not easy to leave; and can reflect light under the light, and has luxurious feeling. The manufacturing process of the horsehip leather is complex, and the process of tanning a horsehip leather can be finished by a skilled worker for six months at least, so the horsehip leather is known as 'diamond in leather', and is one of top-grade leather. The luxurious leather is produced on the basis of the complex process of treating the hippophae rhamnoides skin, long cycle, limited raw material resources and very high price of the hippophae rhamnoides skin at the present stage, and only two manufacturers in the world can produce the luxury leather in a large scale.

With the development of economy, the demand of people for high-grade leather is also increasing, and particularly, the leather material, such as hippo leather, has high leather surface grade and fine texture, but the price is very high, so that consumers can find the leather to be dusty. Chinese patent application No.: 202010800356.9 discloses a method for preparing oil wax leather by using low-grade leather source, which comprises selecting low-grade blue leather as raw material, pretreating the low-grade blue leather by retanning process to compact the leather property, obtaining wear-resistant and mould-pressing-resistant leather blank, and brushing and mending by using mending paste and polishing wax; and after finishing the brushing, grinding the surface repairing paste and the grain surface layer by using a pass type leather grinder in combination with abrasive paper with a specific mesh number, then performing roller coating operation, performing low-temperature and low-pressure mould pressing for multiple times by using a mould pressing plate in the roller coating process, and airing after finishing the roller coating to obtain the finished product of the oil wax leather. The invention can efficiently utilize low-grade leather sources, and the prepared oil wax leather has good strength and wear resistance, uniform, full and prominent grains and low scar visibility, and is suitable for being used as leather for shoes. Whether the low-grade leather can be utilized or not is a fake product with the effect of the hippophae rhamnoides skin prepared by changing the process technology, so that the requirements of consumers are met, and the method is the key point of research.

Disclosure of Invention

Therefore, aiming at the content, the invention provides a method for preparing the environment-friendly Argentina peel embryo wax into the imitation hippophae peel, which takes Argentina blue peel as a raw material to prepare a product with the effect equivalent to that of hippophae peel, solves the problems of high price and limited quantity of the existing hippophae peel, improves the additional value of the blue peel, and has obvious economic benefit.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a method for manufacturing environment-friendly Argentina skin embryo wax into imitation hippophae skin comprises the following steps:

(1) selecting 16-18 feet Argentina blue, placing into a water squeezer, squeezing water until the water content is 20-22%, leveling and uniformly scraping to the thickness of 1.2-1.5cm, then cutting and trimming to 12-14 feet, weighing the weight of the blue;

(2) placing weighed blue leather into a rotary drum, adding water with the temperature of 42-48 ℃, formic acid and a moisture regaining agent, rotating for 60min, adjusting the pH value to 3.3-3.5, then adding oxalic acid, industrial salt and acid enzyme, rotating for 180min, adjusting the pH value to 2.5-2.8, discharging liquid, washing with water, and changing water;

based on the weight of the blue leather obtained after weighing, the dosage of each substance is as follows: 250 percent of water 180-,

(3) adding 30-35 deg.C water, neutralizing tannin and sodium formate into the drum, rotating for 30min, adding sodium bicarbonate, rotating for 60min, adjusting pH to 4.7-4.8, draining, washing with water, and changing water;

based on the weight of the blue leather obtained after weighing, the dosage of each substance is as follows: 80-100% of water, 2-4% of neutralized tannin, 1.5-2.5% of sodium formate and 0.8-1.5% of baking soda;

(4) adding 25-30 deg.C water, vegetable tannin I, vegetable oil and fat, and animal protein into the rotary drum, and rotating for 90 min;

based on the weight of the blue leather obtained after weighing, the dosage of each substance is as follows: 100% of water, 150% of plant tannin I, 3.6-5.2%, 4-6% of vegetable oil and 3-5% of animal protein;

(5) stopping the drum and standing overnight, rotating for 5min every hour, and rotating for 20min before the next day of post-processing;

(6) adding 0.8-1.2% oxalic acid into the rotary drum, rotating for 40min, draining, washing with water, and changing water;

adding oxalic acid twice, adding half of oxalic acid, rotating for 20min, adding the rest oxalic acid, and rotating for 20 min;

(7) adding 1-1.5% sodium bicarbonate into the rotary drum, rotating for 80min, draining, washing with water, and changing water;

(8) adding vegetable oil, animal oil I and acrylic acid tanning agent into the rotary drum, rotating for 60min, then adding vegetable tannin II, synthetic tannin, melamine resin tanning agent, animal oil II, disperse tannin and dye, and rotating for 120 min;

based on the weight of the blue leather obtained after weighing, the dosage of each substance is as follows: 1-2% of vegetable oil, 1.5-3% of animal oil I, 5-8% of acrylic acid tanning agent, 4-6% of vegetable tannin II, 3-5% of synthetic tannin, 4-6% of melamine resin tanning agent, 1-2% of animal oil II, 1-3% of disperse tannin and 0.6-1% of dye;

(9) adding 50-60 deg.C water into the rotary drum, rotating for 40min, adding animal fat I, animal fat II and dye, and rotating for 50 min;

based on the weight of the blue leather obtained after weighing, the dosage of each substance is as follows: 100 percent of water, 150 percent of animal fat I, 2 to 4 percent of animal fat II, 1 to 3 percent of dye, 0.8 to 1.2 percent of dye,

(10) adding 2-3% formic acid into the rotary drum, rotating for 40min, draining, washing with water, and changing water;

(11) adding 50-60 deg.C water and dye for color register, rotating for 20min, adding formic acid, and rotating for 20 min;

based on the weight of the blue leather obtained after weighing, the dosage of each substance is as follows: 200 percent of water, 0.5 to 1.5 percent of dye, 0.6 to 0.8 percent of formic acid,

(12) sequentially adding silicone oil and anionic wax, rotating for 40min, draining liquid, and washing with water;

based on the weight of the blue leather obtained after weighing, the dosage of each substance is as follows: 1-3% of silicone oil and 2-4% of anionic wax;

(13) drum out, building, squeezing and stretching, vacuum, hanging and airing, drying, vibrating and softening, toggling and wax polishing.

The further improvement is that: the animal fat I is FOW animal fat produced by southwestern and Xidun chemical Limited, and the animal fat II is YMZ animal fat produced by Haixiang chemical industry.

The further improvement is that: the moisture regaining agent is formed by mixing MPC moisture regaining agent and SAF moisture regaining agent according to the ratio of 5: 1.

The further improvement is that: the plant tannin I is SUN plant tannin produced by Sichuan Dawei science and technology GmbH, and the plant tannin II is ATO plant tannin produced by Italy SILVATEAM.

By adopting the technical scheme, the invention has the beneficial effects that:

the invention takes Argentina blue as a raw material, and produces the imitation hippophae leather with fine leather surface, thick and solid texture and transparent surface by optimizing the process and reasonably matching various chemical reagents. At the initial stage of processing, formic acid and a moisture regaining agent are added for rewetting, oxalic acid, acid enzyme and industrial salt are added for retanning, after sufficient rewetting and retanning, the grain surface of the blue leather can be well opened, the grains are clear, the leather body is soft, the water absorption is good, and a solid foundation is laid for later material penetration. The rewetting is an early process of leather production, and is used for paving subsequent processes of filling, dyeing and the like, and the quality of the rewetting effect of the blue leather influences the absorption of the leather on chemical materials such as retanning agents, dyes and the like, and determines the quality and the grade of finished leather products, so that the rewetting effect is particularly critical. The application discovers that a good rewetting effect cannot be realized by adding a single rewetting agent in the test process, the softness of the leather body is general, the grain surface is thick, and the grain surface is not smooth and fine enough.

Stopping the drum and standing overnight to ensure that the blue leather fully utilizes the materials which are not effectively combined in a standing state; the vegetable tannin which is not completely permeated after the blue skin is stood is combined with the surface of the blue skin, the phenomena of surface combination overload and color change are easily caused, and the oxalic acid is added after the blue skin is stood overnight, so that the grain surface can be cleaned once, and the combination of dye in the later process is facilitated.

In the filling procedure, plant tannin is adopted for proper filling, which is beneficial to the retraction of the hide fiber in the subsequent process, but the adverse effects that the pattern is difficult to bulge and the epidermis is dry are easily caused by excessive filling, and the animal and plant oil is added to be matched with the plant tannin, so that the adverse conditions can be improved.

Two different animal fats are added in the greasing process, wherein the YMZ fat can ensure the surface touch of the blue skin, and the FOW fat can permeate into the inner part of the blue skin to increase the oil-moistening feeling of the skin core.

Detailed Description

The following detailed description will be provided for the embodiments of the present invention with reference to specific embodiments, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.

Unless otherwise indicated, the techniques employed in the examples are conventional and well known to those skilled in the art, and the reagents and products employed are also commercially available. The source, trade name and if necessary the constituents of the reagents used are indicated at the first appearance.

Examples

A method for manufacturing environment-friendly Argentina skin embryo wax into imitation hippophae skin is characterized in that: the method comprises the following steps:

(1) selecting 16-18 feet Argentina blue, putting into a water squeezer, squeezing water until the water content is 20-22%, leveling and uniformly scraping to the thickness of 1.3cm, then cutting and trimming to 12-14 feet, weighing the weight of the blue by weighing;

(2) putting weighed blue leather into a rotary drum according to 100 parts by weight, adding 200 parts of water with the temperature of 45 ℃, 0.35 part of formic acid, 1.5 parts of a moisture scavenger MPC (West chemical industry) and 0.3 part of a moisture scavenger SAF (Delry chemical industry), rotating for 60min, adjusting the pH value to 3.3-3.5, then adding 2 parts of oxalic acid, 5 parts of industrial salt and 1.5 parts of an acid enzyme PK568C (Langsheng chemical industry), rotating for 180min, adjusting the pH value to 2.5-2.8, draining, washing with water and changing water;

(3) adding 80 parts of 30 ℃ water, 2 parts of neutralized tannin PAK (Langsheng chemical industry) and 1.5 parts of sodium formate into the rotary drum, rotating for 30min, adding 0.8 part of baking soda, continuously rotating for 60min, adjusting the pH value to 4.7-4.8, then discharging liquid, washing with water and changing water;

(4) adding 100 parts of 25 deg.C water, 5 parts of vegetable tannin SUN (Sichuan Dawei science and technology Co., Ltd.), 4 parts of vegetable oil PSW (West chemical engineering) and 4 parts of animal protein PC (Riningchemical engineering) into the rotary drum, and rotating for 90 min;

(6) adding 0.4 part of oxalic acid into the rotary drum, rotating for 20min, then adding 0.4 part of oxalic acid, continuing rotating for 20min, discharging liquid, washing with water, and changing water;

(7) adding 1 part of baking soda into the rotary drum, rotating for 80min, then discharging liquid, washing with water, and changing water;

(8) adding 1.5 parts of vegetable oil PSW (West chemical industry), 1.5 parts of animal oil FOW (West chemical industry), 6 parts of acrylic acid tanning agent R83 (Toepller chemical industry), rotating for 60min, then adding 6 parts of vegetable tannin ATO (Shihua company), 5 parts of synthetic tannin JAN (Shineway chemical industry), 5 parts of melamine resin tanning agent 7816 (Bakmann chemical industry), 1.5 parts of animal oil YMZ (Heliand chemical industry), 2 parts of dispersed tannin SLF (Pasov), and 1 part of dye, and rotating for 120 min;

(9) adding 100 parts of water with the temperature of 55 ℃ into the rotary drum, rotating for 40min, then adding 3 parts of animal fat FOW, 2 parts of animal fat YMZ and 0.8 part of dye, and rotating for 50 min;

(10) adding 2 parts of formic acid into the rotary drum, rotating for 40min, then discharging liquid, washing with water, and changing water;

(11) adding 150 parts of water with the temperature of 55 ℃ and 1 part of dye for color matching, rotating for 20min, adding 0.8 part of formic acid, and rotating for 20 min;

(12) sequentially adding 3 parts of silicone oil PSN (West chemical industry) and 3 parts of anionic wax PAW (Toeplier chemical industry), rotating for 40min, then discharging liquid and washing with water;

The amount of the chemical agent used in each step and the process parameters are within the following ranges to achieve the object of the present invention. And (2) adding 180 parts of water at 42-48 ℃ into the rotary drum of the step (2) and 250 parts of water at 250-48 ℃, then adding 0.3-0.4 part of oxalic acid and 1.8-2.4 parts of rewetting agent in total, controlling the pH value of the solution to be within the range of 3.3-3.5, and then adding 2-2.5 parts of oxalic acid, 5-8 parts of industrial salt and 1.5-2 parts of acid enzyme by 100 parts by weight of the weighed blue leather. And (3) adding 80-100 parts of water with the temperature of 30-35 ℃, 2-4 parts of neutralized tannin and 1.5-2.5 parts of sodium formate into the rotary drum, reacting for 30min, adding 0.8-1.5 parts of baking soda, and adjusting the pH value to be within the range of 4.7-4.8. And (4) adding 150 parts of water at 25-30 ℃, 3.6-5.2 parts of vegetable tannin I, 4-6 parts of vegetable oil and fat and 3-5 parts of animal protein into the rotary drum, and reacting for 90 min. And (6) adding 0.8-1.2 parts of oxalic acid into the rotary drum, and reacting for 40 min. And (7) adding 1-1.5 parts of baking soda into the rotary drum, and reacting for 80 min. And (8) adding 1-2 parts of vegetable oil and fat, 1.5-3 parts of animal oil and fat I and 5-8 parts of acrylic acid tanning agent into the rotary drum, reacting for 60min, then adding 4-6 parts of vegetable tannin II, 3-5 parts of synthetic tannin, 4-6 parts of melamine resin tanning agent, 1-2 parts of animal oil and fat II, 1-3 parts of dispersed tannin and 0.6-1 part of dye, and reacting for 120 min. And (9) adding 150 parts of water at 50-60 ℃ into the rotary drum for reaction for 40min, then adding 2-4 parts of animal fat I, 1-3 parts of animal fat II and 0.8-1.2 parts of dye for reaction for 50 min. And (10) adding 2-3 parts of formic acid into the rotary drum, and reacting for 40 min. In the step (11), 150 portions of water at 50-60 ℃, 200 portions of dye, 0.5-1.5 portions of formic acid and 0.6-0.8 portion of formic acid are added. And (2) adding 1-3 parts of silicone oil and 2-4 parts of anionic wax into the mixture in the step (12) and reacting for 40 min.

The above description is only an embodiment utilizing the technical content of the present disclosure, and any modification and variation made by those skilled in the art can be covered by the claims of the present disclosure, and not limited to the embodiments disclosed.

Claims

1. A method for manufacturing environment-friendly Argentina skin embryo wax into imitation hippophae skin is characterized in that: the method comprises the following steps:

2. The method for making the environment-friendly Argentina leather embryo wax into the imitation hippophae leather according to claim 1, which is characterized in that: the animal fat I is FOW animal fat produced by southwestern and Xidun chemical Limited, and the animal fat II is YMZ animal fat produced by Haixiang chemical industry.

3. The method for making the environment-friendly Argentina leather embryo wax into the imitation hippophae leather according to claim 1, which is characterized in that: the moisture regaining agent is formed by mixing MPC moisture regaining agent and SAF moisture regaining agent according to the ratio of 5: 1.

4. The method for making the environment-friendly Argentina leather embryo wax into the imitation hippophae leather according to claim 1, which is characterized in that: the plant tannin I is SUN plant tannin produced by Sichuan Dawei science and technology GmbH, and the plant tannin II is ATO plant tannin produced by Italy SILVATEAM.