CN118814490A - A method for manufacturing low-carbon, environmentally friendly and recyclable space synthetic leather - Google Patents
A method for manufacturing low-carbon, environmentally friendly and recyclable space synthetic leather Download PDFInfo
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- CN118814490A CN118814490A CN202411065424.6A CN202411065424A CN118814490A CN 118814490 A CN118814490 A CN 118814490A CN 202411065424 A CN202411065424 A CN 202411065424A CN 118814490 A CN118814490 A CN 118814490A
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- synthetic leather
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
- D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
本发明涉及合成革技术领域，具体为一种低碳环保可回收太空合成革的制造方法，包括如下步骤：1、边角料回收；2、回收的材料清之后再造粒；3、回收料用螺杆溶化；4、制成无纺布基布。5、将无纺布用浸渍液多次浸透，轧辊挤压，保持无纺布的带液率在70‑80％。6、将制得的无纺布通过凝固槽的凝固液进行凝固；7、对轧压后的无纺布进行水洗，清除多余的凝固液以及DMFA含量。8、厚度要求在1.4mm‑1.55n。有效简化了制造流程，减少了生产步骤，提升了生产效率；优化制造过程中的能耗环节，降低整体能耗，节约资源；实现了生产边角料和废弃材料的回收再利用；制造出的太空合成革具有优良的物理性能和美观性，能够满足各种应用需求。The present invention relates to the technical field of synthetic leather, specifically to a method for manufacturing low-carbon, environmentally friendly and recyclable space synthetic leather, comprising the following steps: 1. Recycling of scraps; 2. Recycling of cleaned materials and then granulating; 3. Melting of the recycled materials with a screw; 4. Making a non-woven fabric base cloth. 5. Soaking the non-woven fabric with an impregnation liquid for multiple times, and rolling it with a roller to keep the liquid carrying rate of the non-woven fabric at 70-80%. 6. Coagulating the prepared non-woven fabric through the coagulation liquid in a coagulation tank; 7. Washing the rolled non-woven fabric to remove excess coagulation liquid and DMFA content. 8. The thickness is required to be 1.4mm-1.55mm. The manufacturing process is effectively simplified, the production steps are reduced, and the production efficiency is improved; the energy consumption links in the manufacturing process are optimized, the overall energy consumption is reduced, and resources are saved; the recycling and reuse of production scraps and waste materials is realized; the manufactured space synthetic leather has excellent physical properties and aesthetics, and can meet various application requirements.
Description
Technical Field
The invention relates to the technical field of synthetic leather, in particular to a manufacturing method of low-carbon environment-friendly recoverable space synthetic leather.
Background
The existing synthetic leather manufacturing process is complex, and usually needs multiple procedures (such as base cloth impregnation, flocculation, padding, ironing, coating of aqueous polyurethane foaming material, predrying, flocculation, washing, drying, back coating and the like) to finish, so that a large amount of energy is consumed. In addition, organic solvents such as DMFA are often used in these processes, which have adverse environmental and operator health effects.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention provides a manufacturing method of low-carbon environment-friendly recyclable space synthetic leather.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: a manufacturing method of low-carbon environment-friendly recoverable space synthetic leather comprises the following steps:
Step 1, recycling leftover materials: the synthetic leather leftover materials and waste synthetic leather materials generated in the production process are intensively recycled;
step 2, cleaning and granulating the recovered material: thoroughly cleaning the recovered leftover materials and waste materials, removing dirt and impurities on the surface, and then sending the mixture into a granulator for granulation treatment to form uniform and fine regenerated particles;
step 3, dissolving reclaimed materials: feeding the granulated regenerated particles into a double-screw extruder, heating and dissolving the regenerated particles through a temperature control system, and plasticizing the regenerated particles to form continuous and stable fluid;
step 4, manufacturing non-woven fabric base cloth: the melted material is cooled by an extrusion molding process to form non-woven fabric base cloth with certain strength and elasticity;
Step 5, treating the impregnating solution: preparing environment-friendly impregnating solution, feeding the obtained non-woven fabric base cloth into an impregnating tank, fully absorbing the impregnating solution in the non-woven fabric through multiple times of impregnation, and extruding the impregnated base cloth through a roller;
Step 6, solidification treatment: feeding the impregnated non-woven fabric base cloth into a solidification tank, and uniformly solidifying the impregnating solution in the base cloth by controlling parameters such as temperature, flow rate and the like to form a firm solidification layer;
Step 7, washing and drying: washing the solidified non-woven fabric base cloth for multiple times to ensure that excessive coagulating liquid and residual organic components are thoroughly removed, and drying the non-woven fabric base cloth by an advanced drying device after washing to ensure that the water content of the material is controlled within a specified range;
step 8, the thickness of the product is between 1.4mm and 1.55 mm;
step 9, treating the surface of the synthetic leather, such as embossing, hot pressing, waterproof coating and the like;
and 10, rolling and packaging qualified materials, and cutting according to requirements.
Preferably, in the step 2, ultrasonic cleaning is adopted, and the cleaned material is subjected to granulation treatment after air drying or drying.
Preferably, in the step 3, an antioxidant and an ultraviolet absorber may be added before the extrusion of the material to enhance the durability of the material in subsequent use.
Preferably, in the step 5, the impregnating solution comprises aqueous polyurethane, nano filler and plasticizer.
Preferably, in the step 5, the liquid carrying rate is controlled to be between 70 and 80 percent.
Preferably, in the step 7, the drying treatment includes infrared drying and hot air drying.
Preferably, in the step 8, the laser thickness gauge is used for monitoring and feeding back and adjusting the production parameters in real time, so as to ensure the thickness of the product.
Preferably, in the step 9, the surface of the synthetic leather is subjected to a specific functional coating treatment according to the requirement.
(III) beneficial effects
Compared with the prior art, the invention provides a manufacturing method of the low-carbon environment-friendly recyclable space synthetic leather, which has the following beneficial effects:
The manufacturing method of the low-carbon environment-friendly recyclable space synthetic leather effectively simplifies the manufacturing process, reduces the production steps and improves the production efficiency;
The energy consumption link in the manufacturing process is optimized, the whole energy consumption is reduced, and the resources are saved;
recycling and reutilization of production leftover materials and waste materials are realized;
the manufactured space synthetic leather has excellent physical properties and aesthetic properties, and can meet various application requirements;
The DMFA is cleaned by water washing, so that the pollution influence on operators and subsequent use of products is reduced.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
A manufacturing method of low-carbon environment-friendly recoverable space synthetic leather comprises the following steps:
Step 1, recycling leftover materials: and (3) intensively recycling the synthetic leather scraps and waste synthetic leather materials generated in the production process. The waste materials of an external mechanism can be accepted, so that the recovery range is enlarged, and the raw material source is increased;
Step 2, cleaning and granulating the recovered material: and thoroughly cleaning the recovered leftover materials and waste materials, and removing stains and impurities on the surface. The ultrasonic cleaning technology can be adopted, so that the cleaning effect is further improved, and no pollution is ensured in the granulating process. The cleaned material is subjected to air drying or drying treatment and then is sent into a granulator for granulation treatment, so that uniform and fine regenerated particles are formed;
step 3, dissolving reclaimed materials:
feeding the granulated regenerated particles into a double-screw extruder, heating and melting by an accurate temperature control system, plasticizing to form continuous and stable fluid, and optionally adding an antioxidant and an ultraviolet absorber to enhance the durability of the material in subsequent use;
Step 4, manufacturing non-woven fabric base cloth: and cooling the melted material through an extrusion molding process to form the non-woven fabric base cloth with certain strength and elasticity. The thickness and strength of the base cloth can be controlled by adjusting parameters of the extruder and the die head so as to meet the requirements of different purposes;
Step 5, treating the impregnating solution: the components of the prepared environment-friendly impregnating solution can comprise aqueous polyurethane, nano-filler and plasticizer, so that the performance of the base fabric is improved. The obtained nonwoven fabric base fabric was fed into an impregnation tank, and impregnated with the impregnating solution a plurality of times, whereby the inside of the nonwoven fabric was sufficiently impregnated with the impregnating solution. The soaked base cloth is extruded by a roller, and the liquid carrying rate is controlled to be 70-80%;
Step 6, solidification treatment: feeding the impregnated non-woven fabric base cloth into a solidification tank, and uniformly solidifying the impregnating solution in the base cloth by accurately controlling parameters such as temperature, flow rate and the like to form a firm solidification layer;
Step 7, washing and drying: and (3) washing the coagulated non-woven fabric base fabric for a plurality of times to ensure that excessive coagulating liquid and residual organic components are thoroughly removed, for example, DMFA is cleaned. The water washing equipment can be provided with a multi-stage filtration system, so that water resources are recycled, and the water consumption is further reduced. After washing, drying treatment is carried out by an advanced drying device, and an infrared drying or hot air drying mode can be adopted to ensure that the water content of the material is controlled within a specified range;
step 8, thickness control:
The thickness of the synthetic leather is strictly controlled in the production process, and the thickness of the product is ensured to be between 1.4mm and 1.55mm so as to meet the standards of different application scenes on the thickness of the material. Monitoring and feeding back and adjusting production parameters in real time by using a laser thickness gauge, so as to ensure the consistency and the precision of products;
step 9, surface treatment and post-treatment: the surface of the synthetic leather is treated, such as embossing, hot pressing, waterproof coating and the like, so that the beauty and the functionality of the product are improved. Specific functional coating treatment such as antibiosis, dust prevention, static prevention and the like can be carried out according to the requirements of customers;
Step 10, rolling and slitting: the synthetic leather after the treatment is rolled and packaged, and is accurately cut according to the requirements of customers, so that products with different sizes and shapes are provided, and the synthetic leather is suitable for various application scenes.
Example 1: in the implementation process, the recycled leftover materials are strictly cleaned and granulated, so that the uniformity of particles is ensured. The improved screw extruder is utilized to melt and granulate, the non-woven fabric base cloth is extruded and molded, the impregnating solution adopts a low-toxicity aqueous polyurethane formula, the liquid ratio of the base cloth is ensured to be about 75% through repeated soaking and extrusion, then the base cloth is solidified in a solidification tank by using green and environment-friendly solidification liquid, and the base cloth is thoroughly dried after washing by water, so that the thickness of the finished synthetic leather is ensured to be about 1.5mm, and the base cloth has good flexibility and waterproof performance.
Example 2: in the embodiment, the process is further optimized, and the cleaning efficiency is improved and the environment is protected by adding the biodegradable detergent in the cleaning process of recycling the leftover materials. In the granulating process, an antioxidant and a light stabilizer are added, so that the material is ensured to be stable in performance in long-term use. Nano particles are added into the impregnating solution, so that the strength and the wear resistance of the synthetic leather are further improved. In the water washing link, a multistage countercurrent washing technology is adopted, so that the washing effect is improved under the condition of reducing water consumption. The surface of the final synthetic leather is treated with the easy-cleaning coating, so that the synthetic leather not only has excellent mechanical properties, but also has the characteristics of antifouling property and easy cleaning.
In order to describe the possible application scenarios, technical principles, practical embodiments, and the like of the present application in detail, the following description is made with reference to the specific embodiments. The embodiments described herein are only for more clearly illustrating the technical aspects of the present application, and thus are only exemplary and not intended to limit the scope of the present application.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of the phrase "in various places in the specification are not necessarily all referring to the same embodiment, nor are they particularly limited to independence or relevance from other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment may be combined in any manner to form a corresponding implementable technical solution.
Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application pertains; the use of related terms herein is for the purpose of describing particular embodiments only and is not intended to limit the application.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The manufacturing method of the low-carbon environment-friendly recoverable space synthetic leather is characterized by comprising the following steps of:
Step 1, recycling leftover materials: the synthetic leather leftover materials and waste synthetic leather materials generated in the production process are intensively recycled;
step 2, cleaning and granulating the recovered material: thoroughly cleaning the recovered leftover materials and waste materials, removing dirt and impurities on the surface, and then sending the mixture into a granulator for granulation treatment to form uniform and fine regenerated particles;
step 3, dissolving reclaimed materials: feeding the granulated regenerated particles into a double-screw extruder, heating and dissolving the regenerated particles through a temperature control system, and plasticizing the regenerated particles to form continuous and stable fluid;
step 4, manufacturing non-woven fabric base cloth: the melted material is cooled by an extrusion molding process to form non-woven fabric base cloth with certain strength and elasticity;
Step 5, treating the impregnating solution: preparing environment-friendly impregnating solution, feeding the obtained non-woven fabric base cloth into an impregnating tank, fully absorbing the impregnating solution in the non-woven fabric through multiple times of impregnation, and extruding the impregnated base cloth through a roller;
Step 6, solidification treatment: feeding the impregnated non-woven fabric base cloth into a solidification tank, and uniformly solidifying the impregnating solution in the base cloth by controlling parameters such as temperature, flow rate and the like to form a firm solidification layer;
Step 7, washing and drying: washing the solidified non-woven fabric base cloth for multiple times to ensure that excessive coagulating liquid and residual organic components are thoroughly removed, and drying the non-woven fabric base cloth by an advanced drying device after washing to ensure that the water content of the material is controlled within a specified range;
step 8, the thickness of the product is between 1.4mm and 1.55 mm;
step 9, treating the surface of the synthetic leather, such as embossing, hot pressing, waterproof coating and the like;
and 10, rolling and packaging qualified materials, and cutting according to requirements.
2. The method for manufacturing the low-carbon environment-friendly recyclable space synthetic leather according to claim 1, which is characterized in that: in the step 2, ultrasonic cleaning is adopted, and the cleaned material is subjected to granulation treatment after air drying or drying.
3. The method for manufacturing the low-carbon environment-friendly recyclable space synthetic leather according to claim 2, which is characterized in that: in step 3, antioxidants and ultraviolet absorbers may be added prior to material extrusion to enhance the durability of the material in subsequent use.
4. The method for manufacturing the low-carbon environment-friendly recyclable space synthetic leather according to claim 3, which is characterized in that: in the step 5, the impregnating solution comprises aqueous polyurethane, nano filler and plasticizer.
5. The method for manufacturing the low-carbon environment-friendly recyclable space synthetic leather according to claim 4, which is characterized in that: in the step 5, the liquid carrying rate is controlled to be between 70 and 80 percent.
6. The method for manufacturing the low-carbon environment-friendly recyclable space synthetic leather according to claim 5, which is characterized in that: in the step 7, the drying treatment includes infrared drying and hot air drying.
7. The method for manufacturing the low-carbon environment-friendly recyclable space synthetic leather according to claim 6, which is characterized in that: in the step 8, a laser thickness gauge is used for monitoring and feeding back and adjusting production parameters in real time, so that the thickness of a product is ensured.
8. The method for manufacturing the low-carbon environment-friendly recyclable space synthetic leather according to claim 7, which is characterized in that: in the step 9, the surface of the synthetic leather is subjected to specific functional coating treatment according to requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411065424.6A CN118814490A (en) | 2024-08-05 | 2024-08-05 | A method for manufacturing low-carbon, environmentally friendly and recyclable space synthetic leather |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411065424.6A CN118814490A (en) | 2024-08-05 | 2024-08-05 | A method for manufacturing low-carbon, environmentally friendly and recyclable space synthetic leather |
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| CN118814490A true CN118814490A (en) | 2024-10-22 |
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| CN202411065424.6A Pending CN118814490A (en) | 2024-08-05 | 2024-08-05 | A method for manufacturing low-carbon, environmentally friendly and recyclable space synthetic leather |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792973A (en) * | 2009-12-21 | 2010-08-04 | 厦门泓信超细纤维材料有限公司 | Impregnation method of non-woven fabric |
| KR102057673B1 (en) * | 2019-10-14 | 2019-12-19 | 이광희 | Manufacturing method of functional fabric using natural immersion and multi functional composition and functional fabric by the method |
| US20200240076A1 (en) * | 2017-08-02 | 2020-07-30 | Alcantara S.P.A. | Process for the preparation of a microfibrous suede-like nonwoven fabric |
| CN114941247A (en) * | 2022-07-01 | 2022-08-26 | 万华新材料有限公司 | Production process of low-carbon environment-friendly microfiber synthetic leather base cloth |
| CN114953825A (en) * | 2022-05-17 | 2022-08-30 | 兆丰(福建)新材料有限公司 | Method for manufacturing craft picture by utilizing leather leftover material recycling process |
| RU2794507C1 (en) * | 2021-12-03 | 2023-04-19 | Федеральное государственное унитарное предприятие "18 Центральный научно-исследовательский институт" Министерства обороны Российской Федерации | Method for manufacturing artificial leather |
-
2024
- 2024-08-05 CN CN202411065424.6A patent/CN118814490A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792973A (en) * | 2009-12-21 | 2010-08-04 | 厦门泓信超细纤维材料有限公司 | Impregnation method of non-woven fabric |
| US20200240076A1 (en) * | 2017-08-02 | 2020-07-30 | Alcantara S.P.A. | Process for the preparation of a microfibrous suede-like nonwoven fabric |
| KR102057673B1 (en) * | 2019-10-14 | 2019-12-19 | 이광희 | Manufacturing method of functional fabric using natural immersion and multi functional composition and functional fabric by the method |
| RU2794507C1 (en) * | 2021-12-03 | 2023-04-19 | Федеральное государственное унитарное предприятие "18 Центральный научно-исследовательский институт" Министерства обороны Российской Федерации | Method for manufacturing artificial leather |
| CN114953825A (en) * | 2022-05-17 | 2022-08-30 | 兆丰(福建)新材料有限公司 | Method for manufacturing craft picture by utilizing leather leftover material recycling process |
| CN114941247A (en) * | 2022-07-01 | 2022-08-26 | 万华新材料有限公司 | Production process of low-carbon environment-friendly microfiber synthetic leather base cloth |
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