CN108688263B - Production method of fast-assembling composite top wallboard - Google Patents
Production method of fast-assembling composite top wallboard Download PDFInfo
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- CN108688263B CN108688263B CN201810459979.7A CN201810459979A CN108688263B CN 108688263 B CN108688263 B CN 108688263B CN 201810459979 A CN201810459979 A CN 201810459979A CN 108688263 B CN108688263 B CN 108688263B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/02—Layered products comprising a layer of paper or cardboard next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G14/00—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00
- C08G14/02—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes
- C08G14/04—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes with phenols
- C08G14/06—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes with phenols and monomers containing hydrogen attached to nitrogen
- C08G14/10—Melamines
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
- C09J161/34—Condensation polymers of aldehydes or ketones with monomers covered by at least two of the groups C09J161/04, C09J161/18 and C09J161/20
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/028—Paper layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
- B32B2260/046—Synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/536—Hardness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2607/00—Walls, panels
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Laminated Bodies (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
The invention discloses a production method of a fast-assembling composite top wallboard, which comprises the following steps: s1, selecting raw materials; s2, synthesizing resin; s3, preparing a composite wallboard; and S4, testing the performance of the composite wallboard and preparing a finished product. According to the invention, melamine, phenol and formaldehyde are subjected to copolycondensation under the weak base condition to obtain melamine-phenol-formaldehyde resin, the melamine-phenol-formaldehyde resin is used as matrix resin to prepare a series of laminated boards, and the addition of the glass fiber layer greatly improves the impact strength, tensile strength, elastic modulus and Rockwell hardness of the composite top wallboard, so that the melamine-phenol-formaldehyde resin has long storage period, the formaldehyde emission of the composite top wallboard is increased, and the flame resistance is enhanced.
Description
Technical Field
The invention belongs to the field of architecture, and particularly relates to a production method of a fast-assembly composite top wallboard.
Background
High molecular polymer materials are widely used in various aspects of production and life, but meanwhile, fire caused by flammability of the high molecular polymer materials also brings about serious casualties and economic losses, and the fireproof plate is a fireproof building material for surface decoration and is widely used in the fields of interior decoration, furniture, kitchen cabinets, laboratory tables, outer walls and the like. The fireproof plate has a plurality of varieties, wherein the phenolic fireproof plate is one of varieties which are considered to have satisfactory performance and competitive cost, so that the phenolic fireproof plate has wide application prospect.
However, the flame resistance of the composite top wall panel in the prior art is not good enough, and therefore a production method of the fast-assembly composite top wall panel with good flame resistance is provided to solve the problems.
Disclosure of Invention
The invention aims to provide a production method of a fast-assembling composite top wallboard, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a production method of a fast-assembling composite roof wallboard comprises the following steps:
s1, selecting raw materials: selecting melamine, formaldehyde, phenol, kraft paper, sodium hydroxide solution and glass fiber as raw materials;
s2, synthesis of resin: weighing a certain amount of formaldehyde and phenol, melting the phenol, adding the melted phenol and the formaldehyde into a stirring tank, uniformly stirring, simultaneously adding a certain amount of sodium hydroxide solution to adjust the pH value to 8.0-9.5, heating to 40-45 ℃, adding melamine, continuously heating to 90-95 ℃, preserving heat for 30-45min, and preserving heat for 45-60min when the reaction is finished;
s3, preparation of the composite wallboard: preparing a fireproof plate on a flat vulcanizing machine, adopting a direct method gum dipping process to glue two surfaces of kraft paper, respectively adding three layers, six layers and nine layers of glass fibers in the middle of the kraft paper for reinforcement in the stacking process of the kraft paper, then putting the kraft paper into a drying box for oxidation drying and curing, heating the kraft paper by steam in the drying box, circulating hot air to uniformly dry the kraft paper, and taking down the composite wallboard after drying and cooling;
s4, performance test and finished product preparation of the composite wallboard: and (4) detecting the impact, the tension and the hardness of the extracted composite wallboard, and shearing and polishing the prepared composite wallboard to obtain a finished product.
Preferably, the molar ratio of the formaldehyde to the phenol in the step S2 is 1:1.0-1.5, and the addition amount of the melamine is 40% of the mass of the phenol.
Preferably, the operation speed of the impregnated paper base in the step S3 is 10-15 m/min, the temperature of the oven is 90-100 ℃, and the final impregnation amount is 30 g/m.
Preferably, the hot pressing process of the drying oven in the step S3 includes preheating, heating, heat preservation and cooling, wherein the preheating temperature is 40 ℃, the heating temperature is increased to 120 ℃, the heat preservation time is 45-60min, and the cooling is performed to the room temperature.
The invention has the technical effects and advantages that: according to the production method of the fast-assembly composite top wallboard, melamine, phenol and formaldehyde are subjected to copolycondensation under the condition of weak alkali to obtain melamine-phenol-formaldehyde resin, the melamine-phenol-formaldehyde resin is used as matrix resin to prepare a series of laminated boards, and a glass fiber layer is added, so that the impact strength, the tensile strength, the elastic modulus and the Rockwell hardness of the composite top wallboard are greatly improved, the melamine-phenol-formaldehyde resin is long in storage period, the formaldehyde emission of the composite top wallboard is increased, and the flame resistance is enhanced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
A production method of a fast-assembling composite roof wallboard comprises the following steps:
s1, selecting raw materials: selecting melamine, formaldehyde, phenol, kraft paper, sodium hydroxide solution and glass fiber as raw materials;
s2, synthesis of resin: weighing a certain amount of formaldehyde and phenol, melting the phenol, adding the melted phenol and the formaldehyde into a stirring tank, uniformly stirring, simultaneously adding a certain amount of sodium hydroxide solution to adjust the pH value to 8.0-9.5, heating to 40-45 ℃, adding melamine, continuously heating to 90-95 ℃, preserving heat for 30-45min, and preserving heat for 45-60min when the reaction is finished;
s3, preparation of the composite wallboard: preparing a fireproof plate on a flat vulcanizing machine, adopting a direct method gum dipping process to glue two surfaces of kraft paper, respectively adding three layers, six layers and nine layers of glass fibers in the middle of the kraft paper for reinforcement in the stacking process of the kraft paper, then putting the kraft paper into a drying box for oxidation drying and curing, heating the kraft paper by steam in the drying box, circulating hot air to uniformly dry the kraft paper, and taking down the composite wallboard after drying and cooling;
s4, performance test and finished product preparation of the composite wallboard: and (4) detecting the impact, the tension and the hardness of the extracted composite wallboard, and shearing and polishing the prepared composite wallboard to obtain a finished product.
Specifically, in the step S2, the molar ratio of formaldehyde to phenol is 1:1.0-1.5, and the addition amount of melamine is 40% of the mass of phenol.
Specifically, in the step S3, the operation speed of the impregnated paper base is 10-15 m/min, the temperature of the oven is 90-100 ℃, and the final impregnation amount is 30 g/m.
Specifically, the hot-pressing process of the drying box in the step S3 includes preheating, heating, heat preservation and cooling, wherein the preheating temperature is 40 ℃, the heating is carried out to 120 ℃, the heat preservation time is 45-60min, and the cooling is carried out to the room temperature.
According to the production method of the fast-assembly composite top wallboard, melamine, phenol and formaldehyde are subjected to copolycondensation under the condition of weak alkali to obtain melamine-phenol-formaldehyde resin, the melamine-phenol-formaldehyde resin is used as matrix resin to prepare a series of laminated boards, and a glass fiber layer is added, so that the impact strength, the tensile strength, the elastic modulus and the Rockwell hardness of the composite top wallboard are greatly improved, the melamine-phenol-formaldehyde resin is long in storage period, the formaldehyde emission of the composite top wallboard is increased, and the flame resistance is enhanced.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
A production method of a fast-assembling composite roof wallboard comprises the following steps:
s1, selecting raw materials: selecting melamine, formaldehyde, phenol, kraft paper, sodium hydroxide solution and glass fiber as raw materials;
s2, synthesis of resin: weighing a certain amount of formaldehyde and phenol, melting the phenol, adding the melted phenol and the formaldehyde into a stirring tank, uniformly stirring, simultaneously adding a certain amount of sodium hydroxide solution to adjust the pH value to 8.0-9.5, heating to 40-45 ℃, adding melamine, continuously heating to 90-95 ℃, preserving heat for 30-45min, and preserving heat for 45-60min when the reaction is finished;
s3, preparation of the composite wallboard: preparing a fireproof plate on a flat vulcanizing machine, adopting a direct method gum dipping process to glue two surfaces of kraft paper, respectively adding three layers, six layers and nine layers of glass fibers in the middle of the kraft paper for reinforcement in the stacking process of the kraft paper, then putting the kraft paper into a drying box for oxidation drying and curing, heating the kraft paper by steam in the drying box, circulating hot air to uniformly dry the kraft paper, and taking down the composite wallboard after drying and cooling;
s4, performance test and finished product preparation of the composite wallboard: and (4) detecting the impact, the tension and the hardness of the extracted composite wallboard, and shearing and polishing the prepared composite wallboard to obtain a finished product.
Specifically, in the step S2, the molar ratio of formaldehyde to phenol is 1:1.0-1.5, and the addition amount of melamine is 40% of the mass of phenol.
Specifically, in the step S3, the operation speed of the impregnated paper base is 10-15 m/min, the temperature of the oven is 90-100 ℃, and the final impregnation amount is 30 g/m.
Specifically, the hot-pressing process of the drying box in the step S3 includes preheating, heating, heat preservation and cooling, wherein the preheating temperature is 40 ℃, the heating is carried out to 120 ℃, the heat preservation time is 45-60min, and the cooling is carried out to the room temperature.
According to the production method of the fast-assembly composite top wallboard, melamine, phenol and formaldehyde are subjected to copolycondensation under the condition of weak alkali to obtain melamine-phenol-formaldehyde resin, the melamine-phenol-formaldehyde resin is used as matrix resin to prepare a series of laminated boards, and a glass fiber layer is added, so that the impact strength, the tensile strength, the elastic modulus and the Rockwell hardness of the composite top wallboard are greatly improved, the melamine-phenol-formaldehyde resin is long in storage period, the formaldehyde emission of the composite top wallboard is increased, and the flame resistance is enhanced.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (3)
1. A production method of a fast-assembling composite roof wallboard is characterized by comprising the following steps:
s1, selecting raw materials: selecting melamine, formaldehyde, phenol, kraft paper, sodium hydroxide solution and glass fiber as raw materials;
s2, synthesis of resin: weighing a certain amount of formaldehyde and phenol, melting the phenol, adding the phenol and the formaldehyde into a stirring tank, uniformly stirring, adding a certain amount of sodium hydroxide solution, adjusting the p H value to be 8.0-9.5, heating to 40-45 ℃, adding melamine, continuously heating to 90-95 ℃, keeping the temperature for 30-45min, and keeping the temperature of the solution for 45-60min when the reaction is finished, wherein the molar ratio of the formaldehyde to the phenol is 1:1.0-1.5, and the addition amount of the melamine is 40% of the mass of the phenol;
s3, preparation of the composite wallboard: preparing a fireproof plate on a flat vulcanizing machine, adopting a direct method gum dipping process to glue two surfaces of kraft paper, respectively adding three layers, six layers and nine layers of glass fibers in the middle of the kraft paper for reinforcement in the stacking process of the kraft paper, then putting the kraft paper into a drying box for oxidation drying and curing, heating the kraft paper by steam in the drying box, circulating hot air to uniformly dry the kraft paper, and taking down the composite wallboard after drying and cooling;
s4, performance test and finished product preparation of the composite wallboard: and (4) detecting the impact, the tension and the hardness of the extracted composite wallboard, and shearing and polishing the prepared composite wallboard to obtain a finished product.
2. The method of claim 1 for producing a quick-install composite ceiling panel, wherein: in the step S3, the operation speed of the gumming paper machine is 10-15 m/min, the temperature of the oven is 90-100 ℃, and the final gum dipping amount is 30 g/m.
3. The method of claim 1 for producing a quick-install composite ceiling panel, wherein: and the hot pressing process of the drying box in the step S3 comprises preheating, heating, heat preservation and cooling, wherein the preheating temperature is 40 ℃, the heating is carried out to 120 ℃, the heat preservation time is 45-60min, and the cooling is carried out to the room temperature.
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| CN201810459979.7A CN108688263B (en) | 2018-05-15 | 2018-05-15 | Production method of fast-assembling composite top wallboard |
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| CN201810459979.7A CN108688263B (en) | 2018-05-15 | 2018-05-15 | Production method of fast-assembling composite top wallboard |
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| CN112715386B (en) * | 2021-01-15 | 2023-01-24 | 上海奇偌新材料科技有限公司 | Environment-friendly agglomerated cat litter and production process thereof |
| CN113619245B (en) * | 2021-07-21 | 2023-06-09 | 今创集团股份有限公司 | High-strength composite decoration panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201179674Y (en) * | 2008-03-18 | 2009-01-14 | 金月华 | Wooden composite decoration sheet |
| CN103571409A (en) * | 2012-07-31 | 2014-02-12 | 苏州维艾普新材料有限公司 | High-temperature resistant and fire-retardant adhesive and preparation method thereof |
| CN104942966A (en) * | 2014-03-24 | 2015-09-30 | 周国贞 | Machining process of fireproof board |
| CN105500873A (en) * | 2015-12-22 | 2016-04-20 | 苏州市强森木业有限公司 | Manufacturing method of synergistic flame-retardant composite laminated fireproof plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9133374B2 (en) * | 2012-05-03 | 2015-09-15 | Georgia-Pacific Chemicals Llc | Resin systems for making composite products |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201179674Y (en) * | 2008-03-18 | 2009-01-14 | 金月华 | Wooden composite decoration sheet |
| CN103571409A (en) * | 2012-07-31 | 2014-02-12 | 苏州维艾普新材料有限公司 | High-temperature resistant and fire-retardant adhesive and preparation method thereof |
| CN104942966A (en) * | 2014-03-24 | 2015-09-30 | 周国贞 | Machining process of fireproof board |
| CN105500873A (en) * | 2015-12-22 | 2016-04-20 | 苏州市强森木业有限公司 | Manufacturing method of synergistic flame-retardant composite laminated fireproof plate |
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Effective date of registration: 20231207 Address after: 239000 No. 98 Garden Road West, Anhui, Chuzhou Patentee after: ANHUI YANGZI FLOORING Inc.,Co. Patentee after: Anhui Yangzi Meijia New Material Technology Co.,Ltd. Address before: 239000 No. 98 Garden Road West, Anhui, Chuzhou Patentee before: ANHUI YANGZI FLOORING Inc.,Co. |
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| OL01 | Intention to license declared | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20181023 Assignee: Laian Yangtze Floor Co.,Ltd. Assignor: ANHUI YANGZI FLOORING Inc.,Co.|Anhui Yangzi Meijia New Material Technology Co.,Ltd. Contract record no.: X2025980024922 Denomination of invention: A production method for a quick-assembly composite ceiling and wall panel Granted publication date: 20210202 License type: Open License Record date: 20250930 |