Preparation method of bio-based degradable fiber synthetic leather

Abstract

The invention relates to the technical field of fiber synthetic leather, in particular to a preparation method of bio-based degradable fiber synthetic leather, which comprises the following steps: step 1, preparing a bio-based raw material, selecting an easily degradable bio-based material as a raw material base, then screening the material, and splitting out unqualified materials; 2, the qualified materials after screening are cleaned, the cleaned materials are put into a pulverizer to be pulverized, and then the pulverized materials are subjected to chemical modification treatment, so that the performance and machinability of the materials are improved; 3, the treated bio-based raw materials are poured into a pelletizer, the bio-based raw materials are changed into particles through the pelletizer, and then the granular raw materials are filtered through filtering equipment. The problem that existing bio-based degradable fiber synthetic leather is poor in biodegradability is solved.

Description

Technical Field

[0001] The invention relates to the technical field of fiber synthetic leather, in particular to a method for preparing bio-based degradable fiber synthetic leather. Background Art

[0002] As we all know, bio-based degradable fiber synthetic leather is an environmentally friendly synthetic leather material, usually produced from bio-based materials, with degradability and sustainability. The produced bio-based degradable fiber synthetic leather has the characteristics of environmental protection and degradability, and can be used to make environmentally friendly leather products, such as bags, shoes, clothing, etc. This bio-based material preparation method helps to reduce dependence on traditional leather, reduce the impact on the environment, and is in line with the concept of sustainable development.

[0003] However, the bio-based degradable fiber synthetic leather produced by the existing preparation method of bio-based degradable fiber synthetic leather has poor degradation performance, which easily increases the difficulty of its subsequent waste treatment and imposes a burden on the environment. In addition, consumers have increasingly higher requirements for environmental performance, and the poor degradability of the product is also likely to affect market acceptance. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the present invention provides a method for preparing bio-based degradable fiber synthetic leather.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solution: a method for preparing bio-based degradable fiber synthetic leather, characterized in that it comprises the following steps:

[0008] Step 1: Prepare bio-based raw materials, select bio-based materials that are easily degradable as the raw material basis, and then screen the materials to separate unqualified materials;

[0009] Step 2: Clean the qualified materials after screening, put the cleaned materials into a pulverizer for crushing, and then chemically modify the crushed materials to improve the performance and processability of the materials;

[0010] Step 3: Pour the processed bio-based raw materials into a granulator, convert the bio-based raw materials into granules through the granulator, and then filter the granular raw materials through a filtering device to screen out unqualified granular raw materials;

[0011] Step 4: Pour the granular bio-based raw materials into a screw extruder, then pour the additives into the screw extruder together, and then mix the two evenly through a stirring component in the screw extruder;

[0012] Step 5: After the mixture is evenly mixed, the melted material is extruded through a screw extruder, so that the material extruded from the screw extruder becomes a strip-shaped object, and then the strip-shaped object is cooled and formed, and then cut into a specified size to form the desired fiber;

[0013] Step 6: Put the prepared fibers into the designated equipment and make the fibers into non-woven fabrics through melt spinning;

[0014] Step 7: The prepared non-woven fabric is made into a non-woven fabric base through the steps of coating, embossing, printing, laminating, dyeing, and hot pressing;

[0015] Step eight: putting the prepared non-woven fabric into the immersion tank, soaking the non-woven fabric multiple times with the immersion liquid in the immersion tank, and repeatedly squeezing it through the roller during the soaking process to ensure the liquid carrying rate of the non-woven fabric;

[0016] Step nine: then put the non-woven fabric into a coagulation tank, and coagulate the non-woven fabric with the coagulation liquid in the coagulation tank, so as to improve the overall connectivity of the non-woven fabric;

[0017] Step 10, placing the non-woven fabric into a cleaning device, and cleaning the processed non-woven fabric by the cleaning device to remove excess coagulation liquid and DMFA content on the non-woven fabric;

[0018] Step 11: Send the cleaned non-woven fabric to the drying equipment. After drying, the finished product can be obtained.

[0019] In order to improve the degradation performance, the present invention is improved in that the bio-based raw materials in step 1 include plant fiber and starch.

[0020] In order to improve the degradation performance, the present invention is improved in that the auxiliary agent in step 4 includes a biodegradation auxiliary agent, a photoinitiator and an oxidant.

[0021] In order to improve the quality of the finished product, the present invention is improved in that the liquid carrying rate in step eight is between 70% and 80%.

[0022] In order to improve the effect of the finished product, the present invention is improved in that the thickness of the non-woven fabric is controlled between 1.4 mm and 1.55 mm.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the present invention provides a method for preparing bio-based degradable fiber synthetic leather, which has the following beneficial effects:

[0025] The preparation method of the bio-based degradable fiber synthetic leather, 1. This method can accelerate the degradation rate of the material in the natural environment by adding biodegradable additives to the raw materials. These additives are usually bioactive ingredients that help microorganisms decompose the materials. By adding initiators to the raw materials, the degradation reaction of the materials can be promoted when exposed to light, accelerating the decomposition process of the materials. By adding oxidants to the raw materials, the surface area of ​​the materials in contact with oxygen can be increased, promoting oxidation reactions, thereby increasing the degradation rate, thereby improving the biodegradability of the product, avoiding the increase in the difficulty of post-waste treatment due to poor biodegradability, causing a burden on the environment, and consumers have increasingly higher requirements for environmental protection performance, and can also avoid the impact of poor product degradability on market acceptance;

[0026] 2. Keeping the liquid carrying rate on the nonwoven fabric between 70% and 80% can better maintain the uniformity of liquid distribution, which helps to ensure the quality and consistency of the product. A liquid carrying rate of 70% to 80% can usually achieve efficient utilization of liquid resources and avoid waste. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In this embodiment, a method for preparing bio-based degradable fiber synthetic leather is characterized by comprising the following steps:

[0029] Step 1: Prepare bio-based raw materials, select bio-based materials that are easily degradable as the raw material basis, and then screen the materials to separate unqualified materials;

[0030] Step 2: Clean the qualified materials after screening, put the cleaned materials into a pulverizer for crushing, and then chemically modify the crushed materials to improve the performance and processability of the materials;

[0031] Step 3: Pour the processed bio-based raw materials into a granulator, convert the bio-based raw materials into granules through the granulator, and then filter the granular raw materials through a filtering device to screen out unqualified granular raw materials;

[0032] Step 4: Pour the granular bio-based raw materials into a screw extruder, then pour the additives into the screw extruder together, and then mix the two evenly through a stirring component in the screw extruder;

[0033] Step 5: After the mixture is evenly mixed, the melted material is extruded through a screw extruder, so that the material extruded from the screw extruder becomes a strip-shaped object, and then the strip-shaped object is cooled and formed, and then cut into a specified size to form the desired fiber;

[0034] Step 6: Put the prepared fibers into the designated equipment and make the fibers into non-woven fabrics through melt spinning;

[0035] Step 7: The prepared non-woven fabric is made into a non-woven fabric base through the steps of coating, embossing, printing, laminating, dyeing, and hot pressing;

[0036] Step eight: putting the prepared non-woven fabric into the immersion tank, soaking the non-woven fabric multiple times with the immersion liquid in the immersion tank, and repeatedly squeezing it through the roller during the soaking process to ensure the liquid carrying rate of the non-woven fabric;

[0037] Step nine: then put the non-woven fabric into a coagulation tank, and coagulate the non-woven fabric with the coagulation liquid in the coagulation tank, so as to improve the overall connectivity of the non-woven fabric;

[0038] Step 10, placing the non-woven fabric into a cleaning device, and cleaning the processed non-woven fabric by the cleaning device to remove excess coagulation liquid and DMFA content on the non-woven fabric;

[0039] Step 11: Send the cleaned non-woven fabric to the drying equipment. After drying, the finished product can be obtained.

[0040] In order to improve the degradation performance, in this embodiment, the bio-based raw materials in step 1 include plant fiber and starch.

[0041] In order to improve the degradation performance, in this embodiment, the auxiliary agent in step 4 includes a biodegradation auxiliary agent, a photoinitiator and an oxidant.

[0042] In order to improve the quality of the finished product, in this embodiment, the liquid carrying rate in step eight is between 70% and 80%.

[0043] In order to improve the effect of the finished product, in this embodiment, the thickness of the non-woven fabric is controlled between 1.44 mm and 1.55 mm.

[0044] In summary, by screening the raw materials, unqualified raw materials can be screened out to avoid unqualified raw materials affecting the quality of subsequent finished products. By pouring the additives into the screw extruder and stirring them with the melted raw materials, the two can be fully mixed. The additives include biodegradable additives, photoinitiators and oxidants. Adding biodegradable additives can accelerate the degradation rate of materials in the natural environment. These additives are usually bioactive ingredients that help microorganisms decompose materials. Initiators can promote the degradation reaction of materials when exposed to light and accelerate the decomposition process of materials. Adding oxidants can increase the surface area of ​​the material in contact with oxygen and promote oxidation reactions, thereby increasing the degradation rate. The liquid carrying rate on the non-woven fabric is between 70% and 80%, which can better maintain the uniformity of liquid distribution, which helps to ensure the quality and consistency of the product. A liquid carrying rate of 70% to 80% can usually achieve efficient utilization of liquid resources and avoid waste. The thickness of the non-woven fabric is controlled between 1.44mm-1.55mm, which can improve the use effect of the product.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing bio-based degradable fiber synthetic leather, characterized in that: The following steps are involved: Step 1: Prepare bio-based raw materials, select bio-based materials that are easily degradable as the raw material basis, and then screen the materials to separate unqualified materials; Step 2: Clean the qualified materials after screening, put the cleaned materials into a pulverizer for crushing, and then chemically modify the crushed materials to improve the performance and processability of the materials; Step 3: Pour the processed bio-based raw materials into a granulator, convert the bio-based raw materials into granules through the granulator, and then filter the granular raw materials through a filtering device to screen out unqualified granular raw materials; Step 4: Pour the granular bio-based raw materials into a screw extruder, then pour the additives into the screw extruder together, and then mix the two evenly through a stirring component in the screw extruder; Step 5: After the mixture is evenly mixed, the melted material is extruded through a screw extruder, so that the material extruded from the screw extruder becomes a strip-shaped object, and then the strip-shaped object is cooled and formed, and then cut into a specified size to form the desired fiber; Step 6: Put the prepared fibers into the designated equipment and make the fibers into non-woven fabrics through melt spinning; Step 7: The prepared non-woven fabric is made into a non-woven fabric base through the steps of coating, embossing, printing, laminating, dyeing, and hot pressing; Step eight: putting the prepared non-woven fabric into the immersion tank, soaking the non-woven fabric multiple times with the immersion liquid in the immersion tank, and repeatedly squeezing it through the roller during the soaking process to ensure the liquid carrying rate of the non-woven fabric; Step nine; Then the non-woven fabric is placed in a coagulation tank, and the non-woven fabric is coagulated by the coagulation liquid in the coagulation tank, so as to improve the overall connectivity of the non-woven fabric; Step 10, placing the non-woven fabric into a cleaning device, and cleaning the processed non-woven fabric by the cleaning device to remove excess coagulation liquid and DMFA content on the non-woven fabric; Step 11: Send the cleaned non-woven fabric to the drying equipment. After drying, the finished product can be obtained.

2. The method for preparing a bio-based degradable fiber synthetic leather according to claim 1, characterized in that: The bio-based raw materials in step 1 include plant fiber and starch.

3. The method for preparing a bio-based degradable fiber synthetic leather according to claim 2, characterized in that: The auxiliary agents in step 4 include biodegradation auxiliary agents, photoinitiators and oxidants.

4. The method for preparing a bio-based degradable fiber synthetic leather according to claim 3, characterized in that: The liquid carrying rate in step eight is between 70 percent and 80 percent.

5. The method for preparing a bio-based degradable fiber synthetic leather according to claim 4, characterized in that: The thickness of the nonwoven fabric is controlled between 1.4 mm and 1.55 mm.