CN113481734A

CN113481734A - Biological leather and manufacturing method thereof

Info

Publication number: CN113481734A
Application number: CN202110750899.9A
Authority: CN
Inventors: 董凌凌
Original assignee: Dongguan Chengyuan Leather Technology Co ltd
Current assignee: Dongguan Chengyuan Leather Technology Co ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2021-10-08

Abstract

The invention discloses a biological leather and a manufacturing method thereof, wherein a base cloth layer is made of biological base fibers, and an adhesion layer, a surface layer and a surface treatment layer are made of biological base resins, wherein the common property of the materials of the biological base resins and the biological base fibers is that the biological base resins and the biological base fibers are processed from natural raw materials and are easy to decompose, when waste products are treated, the natural degradation rate can be naturally degraded in a composting mode, and is 86% -92%.

Description

Biological leather and manufacturing method thereof

Technical Field

The invention relates to the technical field of leather, in particular to biological leather and a manufacturing method thereof.

Background

In the early days, the materials for making leather were all taken from animal skins, and these animal leather products have good physical properties, such as excellent elasticity, wear resistance and air permeability, but at present, animal skins are scarce in resources, difficult to produce on a large scale, expensive and not generally owned by the general public of consumers. In order to alleviate the situation, the artificial leather as a substitute material is produced by operation, has low production cost, is elegant and beautiful, has high simulation degree, and is popular with the public once being produced.

At present, the existing artificial leather is generally made of chemical materials, is difficult to degrade, and can cause great pollution to the environment by direct burning. Therefore, when the artificial leather is disposed of, it is necessary to decompose the waste materials at a high cost, which causes a problem of high cost.

Therefore, the leather in the prior art needs to be improved to solve the technical problems of difficult degradation and higher treatment cost.

Disclosure of Invention

The present invention aims to provide a biological leather and a manufacturing method thereof, which solve the technical problems.

In order to achieve the purpose, the invention adopts the following technical scheme:

a manufacturing method of biological leather specifically comprises the following steps:

s1: preparing bio-based fibers, and reinforcing the bio-based fibers and the polyester fibers according to a preset proportion by adopting a needle punching method to form a base fabric layer;

s2: preparing bio-based resin, preparing an adhesion layer solution by taking the bio-based resin as a substrate, coating the adhesion layer solution on the upper surface of the base cloth layer, drying and cooling to obtain a leather initial blank;

s3: preparing a surface layer having stripes using the bio-based resin; adhering the surface layer to the upper surface of the adhesion layer of the leather primary blank, and drying to form a leather secondary blank;

s4: and preparing a surface layer treatment layer solution by using the bio-based resin as a substrate, coating the surface layer treatment layer solution on the upper surface of the surface layer of the secondary blank of the leather, and drying to obtain the biological leather.

Optionally, the step S1 specifically includes:

s11, respectively carrying out a cooking separation method on the pineapple peel material and the sisal material to obtain pineapple peel crude fibers and sisal crude fibers;

s12, mixing 60 parts of pineapple peel crude fiber and 20 parts of sisal hemp crude fiber, and grinding into mixed slurry containing cellulose and hemicellulose by using a disc mill, wherein the beating degree of the mixed slurry is 30-35%;

s13, pressing and drying the mixed slurry to generate bio-based fibers;

s14, preparing the base fabric layer by adopting a needle punching method according to the proportion of 8:2 by mass parts of the bio-based fiber and the polyester fiber.

Optionally, the step S2 specifically includes:

s21, preparing bio-based resin;

s22, preparing an adhesive layer solution by using the bio-based resin as a substrate, and stirring, wherein the environmental temperature during stirring is controlled to be 21-28 ℃, the solution temperature is controlled to be 45-52 ℃, and the stirring speed is 650-1000 rpm;

s23, filtering the adhesion layer solution by using a screen, wherein the speed is 21-25 liters per minute;

s24, adding air into the adhesion layer solution by using a mechanical foaming mode according to the foaming ratio of 1.27-1.78;

s25, uniformly coating the bonding layer solution on the base cloth layer, wherein the coating thickness is 0.35-0.72mm, the coating speed is 15-16 m/min, and the bonding layer solution is sent into an oven to be dried, the drying time is 5-8 min, and the drying temperature is 120-150 ℃;

and S26, cooling to obtain the leather initial blank, wherein the cooling time is 3-6 minutes, and the cooling temperature is 10-15 ℃.

Optionally, the step, S21, specifically includes:

s211, converting glucose processed from industrial corn into bio-based propylene glycol under the action of genetically engineered bacteria, and generating bio-based polyol through polymerization;

s212, adding 98-99% of the bio-based polyol and 1-2% of trimethylolpropane into a reaction kettle, heating to 105 ℃, and simultaneously vacuumizing and dehydrating at a vacuum degree of-0.1 MPa for 1 hour;

s213, cooling to 50 ℃, adding 50% of isophorone diisocyanate and 0.05% of organic bismuth catalyst into the reaction kettle, and heating to 80 ℃ for reaction for 2 hours;

s214, cooling to 50 ℃, adding 1% of 2, 2-dimethylolpropionic acid and 0.5% of 1, 4-butanediol into the reaction kettle, heating to 65 ℃, reacting for 2 hours, and then cooling to 40 ℃;

s215, adding 2% of triethylamine into the reaction kettle, stirring for 5 minutes at the speed of 800-900 revolutions per minute, and simultaneously adding 45% of water and stirring for 10 minutes;

s216, adding 2-3% of isophorone diamine into the reaction kettle, and dispersing at a high speed of 1000-1100 revolutions per minute for 1 hour to generate the bio-based resin.

Optionally, the step, S3, specifically includes:

s31, preparing a surface layer solution by using the bio-based resin as a substrate, and defoaming the surface layer solution by vacuum, wherein the vacuum degree is-0.1 MPa, and the time is 1 hour;

s32, coating the defoamed surface layer solution on the line release paper, and then putting the line release paper into a continuous oven for drying to obtain a surface layer; wherein the coating speed is 13-14 m/min, the drying time is 2-3 min, and the drying temperature is 100-120 ℃.

Optionally, after step S3, the method further includes:

and peeling the surface layer of the secondary leather blank and the grain release paper to form a coiled secondary leather blank, and sending the coiled secondary leather blank into a curing chamber for curing treatment at the temperature of 100-110 ℃ for 2 hours to obtain the cured secondary leather blank.

The invention also provides a biological leather, comprising: a base fabric layer made of bio-based fiber, an adhesive layer made of bio-based resin, a surface layer made of bio-based resin, and a surface treatment layer made of bio-based resin; the adhesion layer is adhered to the upper surface of the base fabric layer, the surface layer is provided with stripes, and the surface layer treatment layer is compounded on the upper surface of the surface layer.

Optionally, the following components in percentage by mass of the adhesion layer are: 35 to 40 percent of bio-based resin, 45 to 50 percent of filler, 05 to 2.1 percent of color paste, 0.2 to 0.3 percent of flatting agent, 0.3 to 0.35 percent of foam stabilizer and 1.7 to 2 percent of curing agent.

Optionally, the surface layer comprises the following components in percentage by mass: 62 to 78 percent of bio-based resin, 2.4 to 3.6 percent of bridging agent, 8.5 to 11.5 percent of color paste, 0.2 to 0.3 percent of flatting agent, 0.3 to 0.35 percent of defoaming agent and 1.7 to 2 percent of curing agent.

Optionally, the surface treatment layer comprises the following components in percentage by mass: 85-92% of bio-based resin, 2.7-4.2% of bridging agent, 0.2-0.3% of flatting agent and 1.7-2% of curing agent.

Compared with the prior art, the invention has the following beneficial effects: the base cloth layer is made of bio-based fibers, the adhesion layer, the surface layer and the surface treatment layer are made of bio-based resins, the materials of the bio-based resins and the bio-based fibers have the common property that the bio-based resins and the bio-based fibers are processed from natural raw materials and are easy to decompose, when waste products are treated, the bio-based resins and the bio-based fibers can be naturally degraded in a composting mode, the natural degradation rate is 86% -92%, the incineration decomposition is not needed, the base cloth layer, the adhesion layer, the surface layer and the surface treatment layer are naturally degraded in the composting mode, the emission of carbon and harmful gases is reduced, and the decomposition treatment cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention.

Fig. 1 is a schematic sectional structure of a biological leather.

Illustration of the drawings: a base fabric layer 1, an adhesive layer 2, a surface layer 3 and a surface treatment layer 4.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

The embodiment of the invention provides a manufacturing method of biological leather, which specifically comprises the following steps:

The principle of the invention is as follows: the base cloth layer is made of bio-based fibers, the adhesion layer, the surface layer and the surface treatment layer are made of bio-based resins, the materials of the bio-based resins and the bio-based fibers have the common property that the materials are made of natural raw materials and are easy to decompose, when waste products are treated, the materials can be naturally degraded in a composting mode, and the natural degradation rate is 86% -92%.

In this embodiment, the step S1 specifically includes:

s13, pressing and drying the mixed slurry to generate bio-based fibers;

The base cloth layer of the biological leather is processed by taking pineapple peel crude fiber and sisal hemp crude fiber as raw materials, has the physical properties of the base cloth, can be treated in a natural degradation mode, does not need to be burnt, and reduces the environmental pollution.

In this embodiment, the step S2 specifically includes:

s21, preparing bio-based resin;

Further, the step, S21, specifically includes:

s211, converting glucose processed from industrial corn into bio-based 1, 3-PDO (propylene glycol) under the action of genetically engineered bacteria, and generating bio-based polyol through polymerization;

s213, cooling to 50 ℃, adding 50% of isophorone diisocyanate (IPDI) and 0.05% of organic bismuth catalyst into the reaction kettle, and heating to 80 ℃ for reaction for 2 hours;

s214, cooling to 50 ℃, adding 1% of 2, 2-dimethylolpropionic acid DMPA and 0.5% of 1, 4-butanediol into the reaction kettle, heating to 65 ℃, reacting for 2 hours, and then cooling to 40 ℃;

s215, adding 2% of triethylamine into the reaction kettle, stirring for 5 minutes at the speed of 800-900 revolutions per minute, and simultaneously adding 45% of deionized water and stirring for 10 minutes;

s216, adding 2% -3% of isophorone diamine IPDA into the reaction kettle, and dispersing at a high speed of 1000-1100 revolutions per minute for 1 hour to generate the bio-based resin.

In this embodiment, the step, S3, specifically includes:

In this embodiment, after the step S3, the method further includes:

Example two:

the invention also provides biological leather, which comprises a base cloth layer 1 made of biological-based fibers, an adhesion layer 2 made of biological-based resin, a surface layer 3 made of biological-based resin and a surface treatment layer 4 made of biological-based resin; the adhesive layer 2 is adhered to the upper surface of the base fabric layer 1, the surface layer 3 is provided with stripes, and the surface layer treatment 4 conforms to the upper surface of the surface layer 3;

the biological leather comprises a base cloth layer 1, an adhesive layer 2, a surface layer 3 and a surface treatment layer 4 which are sequentially laminated, wherein the adhesive layer 2, the surface layer 3 and the surface treatment layer 4 are all made of bio-based resin materials, which have the common property that they are processed from natural raw materials and are easily decomposed, when the waste is treated, the waste can be naturally degraded in a composting way, the natural degradation rate is 86-92 percent, compared with the chemical leather in the prior art, the chemical leather does not need to be burnt and decomposed, naturally degrading in a composting way to naturally decompose the adhesion layer 2, the surface layer 3 and the surface treatment layer 4, wherein the base cloth layer 1 is made of bio-based fiber materials and can also naturally degrade, thereby reducing the cost of raw materials, reducing the emission of carbon and harmful gases and reducing the cost of decomposition treatment.

In this embodiment, the following components of the adhesion layer 2 are, by mass: 35 to 40 percent of bio-based resin, 45 to 50 percent of filler, 05 to 2.1 percent of color paste, 0.2 to 0.3 percent of flatting agent, 0.3 to 0.35 percent of foam stabilizer and 1.7 to 2 percent of curing agent.

In this embodiment, the surface layer 3 comprises the following components in percentage by mass: 62 to 78 percent of bio-based resin, 2.4 to 3.6 percent of bridging agent, 8.5 to 11.5 percent of color paste, 0.2 to 0.3 percent of flatting agent, 0.3 to 0.35 percent of defoaming agent and 1.7 to 2 percent of curing agent.

In this embodiment, the surface treatment layer 4 comprises the following components in percentage by mass: 85-92% of bio-based resin, 2.7-4.2% of bridging agent, 0.2-0.3% of flatting agent and 1.7-2% of curing agent.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The manufacturing method of the biological leather is characterized by comprising the following steps:

2. The method for manufacturing biological leather according to claim 1, wherein the step S1 specifically comprises:

s13, pressing and drying the mixed slurry to generate bio-based fibers;

3. The method for manufacturing biological leather according to claim 1, wherein the step S2 specifically comprises:

s21, preparing bio-based resin;

4. The method for manufacturing biological leather according to claim 3, wherein the step, S21, specifically comprises:

5. The method for manufacturing biological leather according to claim 1, wherein the step, S3, specifically comprises:

6. The method for manufacturing biological leather according to claim 1, further comprising, after the step S3:

7. A biological leather, comprising: a base fabric layer made of bio-based fiber, an adhesive layer made of bio-based resin, a surface layer made of bio-based resin, and a surface treatment layer made of bio-based resin; the adhesion layer is adhered to the upper surface of the base fabric layer, the surface layer is provided with stripes, and the surface layer treatment layer is compounded on the upper surface of the surface layer.

8. The biological leather as claimed in claim 7, wherein the adhesive layer comprises the following components in percentage by mass: 35 to 40 percent of bio-based resin, 45 to 50 percent of filler, 05 to 2.1 percent of color paste, 0.2 to 0.3 percent of flatting agent, 0.3 to 0.35 percent of foam stabilizer and 1.7 to 2 percent of curing agent.

9. The biological leather as claimed in claim 7, wherein the surface layer comprises the following components in percentage by mass: 62 to 78 percent of bio-based resin, 2.4 to 3.6 percent of bridging agent, 8.5 to 11.5 percent of color paste, 0.2 to 0.3 percent of flatting agent, 0.3 to 0.35 percent of defoaming agent and 1.7 to 2 percent of curing agent.

10. The biological leather as claimed in claim 7, wherein the surface treatment layer comprises the following components in percentage by mass: 85-92% of bio-based resin, 2.7-4.2% of bridging agent, 0.2-0.3% of flatting agent and 1.7-2% of curing agent.