CN111075147A - Manufacturing process of anti-deformation geothermal floor - Google Patents

Manufacturing process of anti-deformation geothermal floor Download PDF

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Publication number
CN111075147A
CN111075147A CN201911419448.6A CN201911419448A CN111075147A CN 111075147 A CN111075147 A CN 111075147A CN 201911419448 A CN201911419448 A CN 201911419448A CN 111075147 A CN111075147 A CN 111075147A
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China
Prior art keywords
protective
plate
geothermal floor
carbon fiber
heating wire
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Pending
Application number
CN201911419448.6A
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Chinese (zh)
Inventor
皇明祥
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Huzhou Lianshi Huangsheng Wood Industry Co ltd
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Huzhou Lianshi Huangsheng Wood Industry Co ltd
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Application filed by Huzhou Lianshi Huangsheng Wood Industry Co ltd filed Critical Huzhou Lianshi Huangsheng Wood Industry Co ltd
Priority to CN201911419448.6A priority Critical patent/CN111075147A/en
Publication of CN111075147A publication Critical patent/CN111075147A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00Flooring
    • E04F15/02Flooring or floor layers composed of a number of similar elements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00Flooring
    • E04F15/02Flooring or floor layers composed of a number of similar elements
    • E04F15/10Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials
    • E04F15/107Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials composed of several layers, e.g. sandwich panels
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2290/00Specially adapted covering, lining or flooring elements not otherwise provided for
    • E04F2290/02Specially adapted covering, lining or flooring elements not otherwise provided for for accommodating service installations or utility lines, e.g. heating conduits, electrical lines, lighting devices or service outlets
    • E04F2290/023Specially adapted covering, lining or flooring elements not otherwise provided for for accommodating service installations or utility lines, e.g. heating conduits, electrical lines, lighting devices or service outlets for heating

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Floor Finish (AREA)

Abstract

The invention discloses a manufacturing process of an anti-deformation geothermal floor, which comprises the following steps of S1: processing the protective core plate; s2: processing the first protection panel, the second protection panel and the mounting lining plate; s3, processing the protective bottom plate; s4: gluing by a gluing machine → assembling → prepressing → hot pressing by a hot press → tempering by a balance warehouse to obtain a blank of the geothermal floor body; s5: carrying out surface coating on the blank of the geothermal floor body; s6: processing the mounting groove; s7: gluing the inner wall of the mounting groove by using a gluing machine, and then connecting the retainer with the mounting groove. According to the invention, the lower end face of the protective core plate is protected by the mounting lining plate and the protective bottom plate, the upper end face of the protective core plate is protected by the first protective panel and the second protective panel, and in addition, the carbon fiber heating wire is connected with the protective bottom plate through the limiting structure, so that the stability of the connection of the carbon fiber heating wire and the protective bottom plate is effectively improved, and the quality of heating the geothermal floor body by the carbon fiber heating wire is effectively improved.

Description

Manufacturing process of anti-deformation geothermal floor
Technical Field
The invention relates to the related technical field of geothermal floors, in particular to a manufacturing process of an anti-deformation geothermal floor.
Background
The geothermal floor is 'heating by floor radiation, the indoor temperature is uniform, the temperature is radiated from the ground to the top and is decreased from the bottom to the top', and the floor heating floor is necessarily 'selected to be thin but not selected to be thick'. Three layers of solid wood, multi-layer solid wood, bamboo floor and laminate wood floor can be selected, the thickness of the board is not more than 8 mm, and the maximum thickness of the board can not exceed 10 mm. But three layers of solid wood can reach 15 mm. The pure solid wood geothermal floor can reach 18 mm. The plastic floor is generally very thin, the requirement of a geothermal floor on a base material is very high within 5 mm, the temperature difference between day and night is very large in winter, the floor can expand with heat and contract with cold, and a common floor cannot be folded;
the invention discovers that the geothermal floor in the prior art has a simple structure and a single use mode due to the design characteristics of the geothermal floor, reduces the compression resistance of the geothermal floor, further reduces the service life of the geothermal floor, and further cannot meet various use requirements of the geothermal floor at present;
therefore, a manufacturing process of the anti-deformation geothermal floor is provided.
Disclosure of Invention
The invention aims to provide a manufacturing process of an anti-deformation geothermal floor, and aims to solve the problems that the geothermal floor in the prior art is simple in structure and single in use mode due to the design characteristics of the geothermal floor, the compression resistance of the geothermal floor is reduced, the service life of the geothermal floor is further reduced, and various use requirements of the geothermal floor at present cannot be met.
In order to achieve the purpose, the invention is realized by the following technical scheme: a manufacturing process of an anti-deformation geothermal floor comprises a protective core plate, an installation lining plate and a protective bottom plate which are sequentially arranged on the lower end face of the protective core plate, a first protective panel and a second protective panel which are sequentially arranged on the upper end face of the protective core plate, and a carbon fiber heating wire arranged on the lower end face of the protective bottom plate, wherein the carbon fiber heating wire is connected with the protective bottom plate through a limiting structure, the protective core plate, the installation lining plate, the protective bottom plate, the first protective panel and the second protective panel are bonded through a high polymer adhesive, and the protective core plate, the installation lining plate, the protective bottom plate, the first protective panel and the second protective panel form a geothermal floor body;
the limiting structure comprises a mounting groove and a retainer, wherein the mounting groove is arranged on the protective bottom plate and matched with the carbon fiber heating wire, and the retainer is arranged at the connecting position of the mounting groove and the carbon fiber heating wire.
The lower end face of the protective core plate is conveniently protected by the installation lining plate and the protective bottom plate, the upper end face of the protective core plate is protected by the first protective panel and the second protective panel, and the carbon fiber heating wire is connected with the protective bottom plate through the limiting structure, so that the stability of the connection of the carbon fiber heating wire and the protective bottom plate is effectively improved, and the quality of heating the geothermal floor body by the carbon fiber heating wire is effectively improved;
as a preferred aspect of the invention, the carbon fiber heating wire is arranged in a spiral shape, one end of the carbon fiber heating wire is externally connected with the wire holder, and the other end of the carbon fiber heating wire is provided with the sealing bolt, so that the working quality of the heating pipe is effectively ensured, and the quality of heating the geothermal floor body by the heating pipe is effectively improved;
as a preferable aspect of the invention, the cross section of the retainer is semicircular, and the inner wall of the retainer is a smooth arc surface, so that the carbon fiber heating wire is conveniently limited by the retainer, thereby effectively avoiding the damage of the carbon fiber heating wire to the geothermal floor body due to external factors in the actual use process, and further effectively prolonging the service life of the geothermal floor body;
as a preferable aspect of the invention, the outer side of the holder is arranged in a tangent manner with the inner wall of the mounting groove, the holder and the mounting groove are bonded by a polymer adhesive, and the inner wall of the holder is arranged in a tangent manner with the periphery of the carbon fiber heating wire, so that the holder is conveniently connected with the mounting groove by the polymer adhesive, thereby effectively improving the stability of the connection between the holder and the limiting groove, and further effectively improving the stability of the connection between the heating pipe and the limiting groove;
as a preferred aspect of the present invention, the thickness ratio between the first protective face plate, the second protective face plate, the protective core, the mounting patch, and the protective floor is set to 1: 1.5: 2: 1.2:1.3.
As a preferable aspect of the invention, the first protective panel is made of a diamond material, the diamond material has stable chemical properties, and is not easily dissolved in acid and alkali at normal temperature, and the acid and alkali do not act on the first protective panel, so that the toughness of the geothermal floor body is effectively improved; the second protective panel and the mounting lining plate are respectively made of eucalyptus materials, the eucalyptus materials have good toughness, are not easy to damage and beneficial to body health, and are convenient to protect through the first protective panel, so that the toughness of the geothermal floor is effectively improved; the protective core plate is made of pine wood, the pine wood is convenient to process, has good toughness, is beneficial to body health, and meets the environmental protection requirement of modern homes; the protective bottom plate is made of beech, and the beech has the advantages of good bearing performance, good pressure resistance and the like besides the advantages of wood color, texture and hardness, so that the toughness of the geothermal floor body is effectively improved;
the manufacturing process flow of the anti-deformation geothermal floor is as follows:
s1: processing the protective core plate:
the processing steps are as follows: raw materials → drying in a drying kiln → tempering in a balance warehouse → horizontal cutting and cutting at a fixed length → splitting of a sheet saw → connection of core plates by a threading machine;
s2: processing the first protection panel, the second protection panel and the mounting lining plate:
the processing steps are as follows: raw materials → drying in a drying kiln → tempering in a balance warehouse → double-end milling and fixed length cutting on four sides → multi-blade saw slicing → sorting → splicing;
s3, processing the protective bottom plate:
the processing steps are as follows: log → rotary cutting by a rotary cutter → cutting by a plate cutting machine → drying by a drying kiln → tempering by a balance warehouse;
s4: gluing by a gluing machine → assembling → prepressing → hot pressing by a hot press → tempering by a balance warehouse to obtain a blank of the geothermal floor body;
s5: surface coating the blank of the geothermal floor body: sanding → priming paint coating → ultraviolet lamp illumination drying → priming paint coating → drying → primer paint surface sanding → finish paint coating → ultraviolet lamp illumination drying → finish paint coating → drying → complete inspection of the finished product to obtain the geothermal floor body;
s6: processing the mounting groove: longitudinal two-end tenoner mortising slot → transverse two-end tenoner mortising slot;
s7: gluing the inner wall of the mounting groove by using a gluing machine, and then connecting the retainer with the mounting groove.
Compared with the prior art, the invention has the beneficial effects that: the invention has the characteristics of reasonable design and simple operation, the manufacturing process of the anti-deformation geothermal floor comprises a protective core plate, a mounting lining plate and a protective bottom plate which are sequentially arranged on the lower end surface of the protective core plate, a first protective panel and a second protective panel which are sequentially arranged on the upper end surface of the protective core plate, and a carbon fiber heating wire arranged on the lower end surface of the protective bottom plate, wherein the carbon fiber heating wire is connected with the protective bottom plate through a limiting structure, the protective core plate, the mounting lining plate, the protective bottom plate, the first protective panel and the second protective panel are adjacently bonded through a high polymer adhesive, the protective core plate, the mounting lining plate, the protective bottom plate, the first protective panel and the second protective panel form a geothermal floor body, the lower end surface of the protective core plate is protected conveniently through the mounting lining plate and the protective bottom plate, and the upper end surface of the protective core plate is protected through the first protective panel and the second protective panel, in addition the carbon fiber heating wire is connected with the protection bottom plate through the limiting structure, so that the stability of the carbon fiber heating wire connected with the protection bottom plate is effectively improved, and the quality of heating the geothermal floor body by the carbon fiber heating wire is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a geothermal floor in a process for manufacturing a deformation-resistant geothermal floor according to the present invention;
fig. 2 is a structural view of another view of fig. 1 of the geothermal floor in the manufacturing process of the deformation-resistant geothermal floor according to the present invention.
In the figure: 1-a protection bottom plate, 10-an installation groove, 2-an installation lining plate, 3-a protection core plate, 4-a first protection panel, 5-a second protection panel, 6-a carbon fiber heating wire and 7-a retainer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1 and fig. 2, the present invention provides a technical solution: a manufacturing process of an anti-deformation geothermal floor comprises a protective core plate 3, an installation lining plate 2 and a protective bottom plate 1 which are sequentially arranged on the lower end face of the protective core plate 3, a first protective panel 4 and a second protective panel 5 which are sequentially arranged on the upper end face of the protective core plate 3, and a carbon fiber heating wire 6 arranged on the lower end face of the protective bottom plate 1, wherein the carbon fiber heating wire 6 is connected with the protective bottom plate 1 through a limiting structure, the protective core plate 3, the installation lining plate 2, the protective bottom plate 1, the first protective panel 4 and the second protective panel 5 are adjacently bonded through a high polymer adhesive, the protective core plate 3, the installation lining plate 2, the protective bottom plate 1, the first protective panel 4 and the second protective panel 5 form a geothermal floor body, so that the lower end face of the protective core plate 3 is conveniently protected through the installation lining plate 2 and the protective bottom plate 1, the upper end face of the protective core plate 3 is protected through the first protective panel 4 and the second, in addition, the carbon fiber heating wire 6 is connected with the protective bottom plate 1 through a limiting structure, so that the stability of the connection of the carbon fiber heating wire 6 and the protective bottom plate 1 is effectively improved, and the quality of heating the geothermal floor body by the carbon fiber heating wire 6 is effectively improved;
referring to fig. 1 and 2, the carbon fiber heating wire 6 is arranged in a spiral shape, one end of the carbon fiber heating wire 6 is externally connected with the wire holder, and the other end of the carbon fiber heating wire 6 is provided with the sealing bolt, so that the working quality of the heating pipe is effectively ensured, and the quality of heating the geothermal floor body by the heating pipe is effectively improved;
referring to fig. 1 and 2, the limiting structure comprises an installation groove 10 arranged on the protective base plate 1 and matched with the carbon fiber heating wire 6 and a retainer 7 arranged at the connection part of the installation groove 10 and the carbon fiber heating wire 6, the cross section of the retainer 7 is semicircular, and the inner wall of the retainer 7 is a smooth arc surface, so that the carbon fiber heating wire 6 is conveniently limited by the retainer 7, and the damage of the carbon fiber heating wire 6 to the geothermal floor body due to external factors in the actual use process is effectively avoided, and the service life of the geothermal floor body is effectively prolonged; the outer side of the retainer 7 is tangent to the inner wall of the mounting groove 10, the retainer 7 and the mounting groove 10 are bonded through a polymer adhesive, the inner wall of the retainer 7 is tangent to the periphery of the carbon fiber heating wire 6, and the retainer 7 is conveniently connected with the mounting groove 10 through the polymer adhesive, so that the connection stability of the retainer 7 and the limiting groove is effectively improved, and the connection stability of the heating pipe and the limiting groove is further effectively improved;
referring to fig. 1 and 2, the thickness ratio of the first protective panel 4 to the second protective panel 5 to the protective core 3 to the mounting lining plate 2 to the protective base plate is set to 1: 1.5: 2: 1.2:1.3, the first protective panel 4 is made of diamond, the diamond has stable chemical properties, is not easy to dissolve in acid and alkali at normal temperature, and the acid and the alkali do not act on the diamond, so that the toughness of the geothermal floor body is effectively improved; the second protective panel 5 and the mounting lining plate 2 are respectively made of eucalyptus materials, the eucalyptus materials have good toughness, are not easy to damage and beneficial to body health, and are convenient to protect through the first protective panel 4, so that the toughness of the geothermal floor is effectively improved; the protective core plate 3 is made of pine wood, the pine wood is convenient to process, has good toughness, is beneficial to body health, and meets the environmental protection requirement of modern homes; the protective bottom plate is made of beech, and the beech has the advantages of good bearing performance, good pressure resistance and the like besides the advantages of wood color, texture and hardness, so that the toughness of the geothermal floor body is effectively improved;
the manufacturing process flow of the anti-deformation geothermal floor is as follows:
s1: and (3) processing the protective core plate:
the processing steps are as follows: raw materials → drying in a drying kiln → tempering in a balance warehouse → horizontal cutting and cutting at a fixed length → splitting of a sheet saw → connection of core plates by a threading machine;
s2: processing the first protection panel 4, the second protection panel 5 and the mounting lining plate 2:
the processing steps are as follows: raw materials → drying in a drying kiln → tempering in a balance warehouse → double-end milling and fixed length cutting on four sides → multi-blade saw slicing → sorting → splicing;
s3, processing the protective bottom plate:
the processing steps are as follows: log → rotary cutting by a rotary cutter → cutting by a plate cutting machine → drying by a drying kiln → tempering by a balance warehouse;
s4: gluing by a gluing machine → assembling → prepressing → hot pressing by a hot press → tempering by a balance warehouse to obtain a blank of the geothermal floor body;
s5: surface coating the blank of the geothermal floor body: sanding → priming paint coating → ultraviolet lamp illumination drying → priming paint coating → drying → primer paint surface sanding → finish paint coating → ultraviolet lamp illumination drying → finish paint coating → drying → complete inspection of the finished product to obtain the geothermal floor body;
s6: the mounting groove 10 is processed: longitudinal two-end tenoner mortise → transverse two-end tenoner mortise
S7: the inner wall of the mounting groove 10 is coated with glue by a glue coater, and then the holder 7 is connected with the mounting groove 10.
This technical scheme sets up the heat conduction interlayer in the implementation in-process carbon fiber heater outside, and carbon fiber heater generates heat for the electricity, and its linkage segment is provided with electric power connection interface for insert power and controller, and carbon fiber heater can also wear to establish in the heat-conducting tube, and the heat conduction structure can adopt metal or other heat conduction structures to reduce the heat loss in the transfer process.
The device obtained through the design can basically meet the requirements of improving the geothermal floor in the prior art, has simple structure and single use mode due to the design characteristics of the device, reduces the compression resistance of the geothermal floor, further reduces the service life of the geothermal floor, further cannot meet the use of the problems of various use requirements of the geothermal floor at present, but further improves the function of the geothermal floor, and designers further improve the device.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A manufacturing process of an anti-deformation geothermal floor is characterized in that,
s1: processing the protective core plate:
the processing steps are as follows: raw materials → drying in a drying kiln → tempering in a balance warehouse → horizontal cutting and cutting at a fixed length → splitting of a sheet saw → connection of core plates by a threading machine;
s2: processing the first protection panel, the second protection panel and the mounting lining plate:
the processing steps are as follows: raw materials → drying in a drying kiln → tempering in a balance warehouse → double-end milling and fixed length cutting on four sides → multi-blade saw slicing → sorting → splicing;
s3, processing the protective bottom plate:
the processing steps are as follows: log → rotary cutting by a rotary cutter → cutting by a plate cutting machine → drying by a drying kiln → tempering by a balance warehouse;
s4: gluing by a gluing machine → assembling → prepressing → hot pressing by a hot press → tempering by a balance warehouse to obtain a blank of the geothermal floor body;
s5: surface coating the blank of the geothermal floor body: sanding → priming paint coating → ultraviolet lamp illumination drying → priming paint coating → drying → primer paint surface sanding → finish paint coating → ultraviolet lamp illumination drying → finish paint coating → drying → complete inspection of the finished product to obtain the geothermal floor body;
s6: processing the mounting groove: longitudinal two-end tenoner mortising slot → transverse two-end tenoner mortising slot;
s7: gluing the inner wall of the mounting groove by using a gluing machine, and then connecting the retainer with the mounting groove;
wherein the anti-deformation geothermal floor comprises a protective core plate (3), a mounting lining plate (2) and a protective bottom plate (1) which are sequentially arranged on the lower end surface of the protective core plate (3), a first protective panel (4) and a second protective panel (5) which are sequentially arranged on the upper end surface of the protective core plate (3), and a carbon fiber heating wire (6) which is arranged on the lower end surface of the protective bottom plate (1), the carbon fiber heating wire (6) is connected with the protective bottom plate (1) through a limiting structure, the protective core plate (3), the mounting lining plate (2), the protective bottom plate (1), the first protective panel (4) and the second protective panel (5) are bonded by a polymer adhesive, the protective core plate (3), the mounting lining plate (2), the protective bottom plate (1), the first protective panel (4) and the second protective panel (5) form a geothermal floor body;
the limiting structure comprises a mounting groove (10) which is arranged on the protective bottom plate (1) and matched with the carbon fiber heating wire (6), and a retainer (7) which is arranged at the connecting position of the mounting groove (10) and the carbon fiber heating wire (6).
2. The manufacturing process of the anti-deformation geothermal floor as claimed in claim 1, wherein the carbon fiber heating wire (6) is arranged in a spiral shape, one end of the carbon fiber heating wire (6) is externally connected with a wire holder, and the other end of the carbon fiber heating wire (6) is provided with a sealing bolt.
3. The manufacturing process of an anti-deformation geothermal floor according to claim 2, wherein the cross section of the holder (7) is configured as a semicircle, and the inner wall of the holder (7) is configured as a smooth arc surface.
4. The manufacturing process of the anti-deformation geothermal floor as claimed in claim 3, wherein the outer side of the holder (7) is tangential to the inner wall of the installation groove (10), the holder (7) and the installation groove (10) are bonded through a polymer adhesive, and the inner wall of the holder (7) is tangential to the outer circumference of the carbon fiber heating wire (6).
5. The manufacturing process of the deformation-resistant geothermal floor as claimed in claim 4, wherein the thickness ratio of the first protective panel (4), the second protective panel (5), the protective core (3), the mounting liner (2) and the protective bottom plate is set to 1: 1.5: 2: 1.2:1.3.
6. The manufacturing process of a deformation-resistant geothermal floor as claimed in claim 5, wherein the first protective panel (4) is made of diamond, the second protective panel (5) and the mounting lining plate (2) are made of eucalyptus, the protective core plate (3) is made of pine, and the protective base plate (1) is made of beech.
CN201911419448.6A 2019-12-31 2019-12-31 Manufacturing process of anti-deformation geothermal floor Pending CN111075147A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911419448.6A CN111075147A (en) 2019-12-31 2019-12-31 Manufacturing process of anti-deformation geothermal floor

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Application Number Priority Date Filing Date Title
CN201911419448.6A CN111075147A (en) 2019-12-31 2019-12-31 Manufacturing process of anti-deformation geothermal floor

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Publication Number Publication Date
CN111075147A true CN111075147A (en) 2020-04-28

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101804654A (en) * 2009-05-19 2010-08-18 王秀宝 Process for producing formaldehyde-removing solid wood flooring
CN103388852A (en) * 2013-07-30 2013-11-13 卡尔玛地板(苏州)有限公司 Heating floor
CN103821311A (en) * 2013-11-29 2014-05-28 芜湖市欧美德板材有限公司 Novel heated floor
KR20170001735U (en) * 2015-11-10 2017-05-18 서영철 Latex

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101804654A (en) * 2009-05-19 2010-08-18 王秀宝 Process for producing formaldehyde-removing solid wood flooring
CN103388852A (en) * 2013-07-30 2013-11-13 卡尔玛地板(苏州)有限公司 Heating floor
CN103821311A (en) * 2013-11-29 2014-05-28 芜湖市欧美德板材有限公司 Novel heated floor
KR20170001735U (en) * 2015-11-10 2017-05-18 서영철 Latex

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Application publication date: 20200428