WO2022052444A1 - 一种内嵌金属板的复合地板 - Google Patents

一种内嵌金属板的复合地板 Download PDF

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Publication number
WO2022052444A1
WO2022052444A1 PCT/CN2021/082605 CN2021082605W WO2022052444A1 WO 2022052444 A1 WO2022052444 A1 WO 2022052444A1 CN 2021082605 W CN2021082605 W CN 2021082605W WO 2022052444 A1 WO2022052444 A1 WO 2022052444A1
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Prior art keywords
metal plate
composite floor
layer
embedded
filling layer
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PCT/CN2021/082605
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English (en)
French (fr)
Inventor
曹友国
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曹友国
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Priority claimed from CN202021972934.9U external-priority patent/CN213015184U/zh
Priority claimed from CN202010949835.7A external-priority patent/CN111910882A/zh
Application filed by 曹友国 filed Critical 曹友国
Publication of WO2022052444A1 publication Critical patent/WO2022052444A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/10—Flooring 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors

Definitions

  • the invention relates to the technical field of building accessories, in particular to a composite floor with embedded metal plates.
  • Wood-plastic composite board is a kind of wood-plastic composite board which is mainly made of wood (wood cellulose, plant cellulose) as the basic material, thermoplastic polymer material (plastic) and processing aids, etc., mixed evenly and then heated and extruded by mold equipment.
  • the high-tech green environmental protection material has both the properties and characteristics of wood and plastic, and is a new type of environmental protection high-tech material that can replace wood and plastic.
  • Wood-plastic floor is a floor made of wood-plastic composite material. It has the same processing characteristics as wood. It can be sawed, drilled, and nailed with ordinary tools. It is very convenient and can be used like ordinary wood.
  • the technical problem to be solved by the present invention is to provide a composite floor with an embedded metal plate, which can enhance the structural strength and bearing capacity of the plate, and significantly improve its resistance to deformation.
  • the present invention adopts the following technical solutions:
  • the invention provides a composite floor with an embedded metal plate, comprising a wrapping layer, a filling layer and a metal plate.
  • the metal plate is embedded in the filling layer, and the wrapping layer covers the outside of the filling layer. Strength and bearing capacity of the sheet.
  • the metal plate is a concave-convex structure that is bent or bent in the lateral direction, the metal plate extends laterally along the wrapping layer, and includes several staggered convex parts and concave parts.
  • a plurality of through holes are opened in the filling layer.
  • the plurality of through holes and the metal plate are interlaced with each other, and are respectively opened in the convex part and the concave part. The deformation caused by thermal expansion and cold contraction during the use of the floor is reduced through several through holes.
  • the metal plate is provided with a plurality of through holes, the weight of the overall metal plate is reduced by opening the through holes, the weight of the overall composite floor is reduced, and the filling layers at both ends of the metal plate pass through each other.
  • the through holes are arranged along the top surface of the convex part, the bottom surface of the concave part and the transition surface between the concave and convex parts of the metal plate, and the through holes are arranged in a uniform arrangement along the longitudinal direction of the metal plate and staggered in the transverse direction, so that the composite floor has More uniform structural strength and compression and deformation resistance.
  • the metal plate has a wave-like or groove-like bending structure along the transverse direction.
  • the longitudinal section of the protrusion or depression is in any one or more shapes selected from the group consisting of trapezoid, arc, triangle, square and semicircle.
  • At least one longitudinal side of the composite floor is provided with an installation groove, and a plurality of composite floors are assembled by snapping with each other through the installation groove, so as to facilitate the installation of the floor.
  • the filling layer is a foam material layer
  • the foam material can be selected from one or more of polyvinyl chloride (PVC), polypropylene (PP) or polyethylene (PE);
  • the wrapping layer is a wood-grain layer or a simulated wood-grain layer, which consists of a modified resin, the modified resin includes ASA resin or propylene glycol methyl ether acetate (PMA), and the foam material and the modified resin are at high temperature. Mixed layered co-extrusion made.
  • the present invention is a composite floor with a metal plate embedded in it.
  • a metal plate in the filling layer, which is equivalent to the keel of the floor, the compression resistance and bearing capacity of the overall composite floor are significantly improved, and the problem is solved.
  • Laminate floors are prone to compression fractures.
  • a number of through holes are opened in the filling layer, and through the through holes, the foam material of the filling layer has better air permeability, which solves the problem of cracking due to thermal expansion and contraction of the composite floor.
  • the metal plate has a wavy curved or trough-like bending structure in the transverse direction, which can be uniformly stressed at multiple points and improve the compressive capacity of the overall composite floor.
  • the structural strength, compression resistance, deformation resistance and bearing capacity of the plate can be enhanced by lining the pressed metal plate, and the problems of easy deformation, thermal expansion and contraction and fracture of the wood-plastic floor can be solved.
  • the co-extrusion process is used to form the lined pressure-type metal plate, so that the product can significantly improve the performance of compressive deformation.
  • the foamed materials such as PVC with good flame retardancy, the UV resistance, weather resistance, acid and alkali resistance of the floor are improved.
  • Anti-corrosion, wear resistance, etc., and will not fade, life-long maintenance-free, can be widely used in plank roads, parks and other outdoor places of decorative floors.
  • FIG. 1 is a perspective view of Embodiment 1 of the composite floor with embedded metal plates of the present invention
  • FIG. 2 is a perspective view of a metal plate in Embodiment 1 of the composite floor with metal plate embedded in the present invention
  • Fig. 3 is the A-A cross-sectional view of the first embodiment of the composite floor embedded with metal plates of the present invention
  • FIG. 4 is a perspective view of Embodiment 2 of the composite floor with embedded metal plates of the present invention.
  • FIG. 5 is a perspective view of the second embodiment of the metal plate of the composite floor embedded with the metal plate of the present invention.
  • FIG. 6 is a perspective view of Embodiment 3 of the composite floor with embedded metal plates of the present invention.
  • FIG. 7 is a perspective view of the metal plate of the third embodiment of the composite floor embedded with the metal plate of the present invention.
  • 1 is a wrapping layer
  • 2 is a filling layer
  • 3 is a metal plate
  • 4 is a through hole
  • 5 is a through hole
  • 6 is a convex portion
  • 7 is a concave portion
  • 8 is a mounting groove.
  • the present invention provides a composite floor with embedded metal plates, including a wrapping layer 1, a filling layer 2 and a metal plate 3, the metal plate 3 is embedded in the filling layer 1, and the wrapping layer 1 Covered on the outside of the filling layer 2, the strength and bearing capacity of the plate are improved by inserting the metal plate 3.
  • the composite floor of the present invention can be applied to outdoor grounds to decorate landscapes, such as parks, plank roads and other outdoor grounds.
  • the metal plate 3 is a concave-convex structure that is bent or bent in the lateral direction.
  • the metal plate 3 extends laterally along the wrapping layer 1 and includes several interlaced convex parts 6 and concave parts 7.
  • the force capacity of the metal plate 3 liters of the overall composite floor, the multi-point force disperses the pressure, reduces the local pressure, and improves the compression resistance of the overall composite floor.
  • the filling layer 1 is provided with a plurality of through holes 4, and the plurality of through holes 4 and the metal plate 3 are interlaced with each other, and are respectively opened in the convex portion 6 and the concave portion 7, and the floor is reduced through the plurality of through holes 4.
  • the deformation caused by thermal expansion and cold contraction during use can also save the material for preparing the filling layer 1, reduce the cost, and reduce the weight of the floor.
  • a plurality of through holes 5 are formed on the metal plate 3.
  • the weight of the overall metal plate 3 is reduced, the weight of the overall composite floor is reduced, and the filling layers 1 at both ends of the metal plate 3 are mutually Through holes 5 are formed to form an integrated structure; if the through holes 5 are not provided, the filling layer 1 will be divided into upper and lower parts that are basically separated by the metal plate 3. Structural strength and compressive deformation resistance and fracture resistance.
  • the through holes 5 are arranged along the top surface of the convex part, the bottom surface of the concave part and the transition surface between the concave and convex parts of the metal plate 3, and the through holes 5 are arranged in a uniform arrangement along the longitudinal direction of the metal plate 3 and staggered in the transverse direction, so that The composite floor has more uniform structural strength and compression and deformation resistance.
  • the through holes 5 are opened at equal intervals on each side surface of the convex part 6 and the concave part 7 of the metal plate 3, and the filling layer 1 is communicated through the through holes 5 opened evenly at equal intervals, and the pressure is evenly distributed.
  • the metal plate 3 is provided with a groove-shaped bending structure in the transverse direction, and the longitudinal cross-section of the convex part 6 or the concave part 7 is set in a trapezoid shape, so The trapezoidal area of the raised portion 6 can be set to be greater than or equal to the trapezoidal area of the recessed portion 7 .
  • the through holes 4 are respectively opened through the convex portion 6 and the concave portion 7 .
  • the metal plate 3 is provided with a wavy curved structure in the transverse direction, and the longitudinal cross-section of the convex portion 6 or the concave portion 7 is set in an arc shape, and the convex portion is arranged in an arc shape.
  • the area of the longitudinal section of the recessed portion 6 may be equal or unequal.
  • the through holes 4 are respectively opened through the convex portion 6 and the concave portion 7 .
  • the metal plate 3 can also be arranged in several triangular structures in the transverse direction, wherein the longitudinal cross-sections of the convex parts 6 and the concave parts 7 are triangular structures.
  • the through holes 4 are respectively opened through the convex portion 6 and the concave portion 7 .
  • the longitudinal cross-sectional shape of the metal plate 3 can be various shapes with staggered concavities and convexities, in addition to the above-mentioned trapezoid, arc, and triangle, it can also be any one or more shapes of square and semicircle.
  • At least one side of the composite floor is provided with an installation slot 8, and several composite floors are assembled through the installation slot 8 by mutual fastening, so as to facilitate the installation of the floor, and multiple composite floors are assembled through the installation slot 8 by mutual fastening and nesting. Assemble together.
  • the filling layer 1 is a foam material layer, and the foam material can be selected from materials with good flame retardancy as the base material, selected from polyvinyl chloride (PVC), polypropylene (PP) or polyethylene (PE) Optional one or more;
  • the wrapping layer 1 is a wood-grain layer or a simulated wood-grain layer, which consists of a modified resin, and the modified resin includes ASA resin or propylene glycol methyl ether acetate (PMA), so The foamed material and the modified resin are mixed and co-extruded in layers at high temperature.
  • the PVC foam material which is inherently flame retardant in plastics, is selected as the base material. After material modification, wood fiber is added to interweave polyester fiber.
  • the wrapping layer is ASA or PMA co-extrusion material, which is formed by three-layer co-extrusion and lined with profiled steel plate. , the wrapping layer forms various wood grains.

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  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

本发明公开了一种内嵌金属板的复合地板，包括包裹层、填充层和金属板，所述金属板内嵌于填充层之中，包裹层覆盖于填充层外；所述金属板为沿横向呈弯曲或弯折的凹凸相间结构；所述金属板沿包裹层横向延伸，包括若干个交错凸起部和凹陷部。本发明通过在填充层中内嵌金属板，相当于地板的龙骨，可增强板材的结构强度、抗压、抗变形和承载能力，解决木塑地板易变型、热胀冷缩和断裂的问题，同时通过共挤工艺形成内衬压型金属板，使产品具备良好的抗紫外性能、耐候性、耐酸碱性、防腐蚀、耐磨性能等，并且不会褪色，终身免维护。

Description

一种内嵌金属板的复合地板 技术领域
本发明涉及建筑配件技术领域，具体涉及一种内嵌金属板的复合地板。
背景技术
木塑复合板材是一种主要由木材(木纤维素、植物纤维素)为基础材料与热塑性高分子材料(塑料)和加工助剂等，混合均匀后再经模具设备加热挤出成型而制成的高科技绿色环保材料，兼有木材和塑料的性能与特征，是能替代木材和塑料的新型环保高科技材料。木塑地板是用木塑复合材料制成的地板，拥有和木材一样的加工特性，使用普通的工具即可锯切、钻孔、上钉，非常方便，可以像普通木材一样使用。同时具有木材的木质感和塑料的耐水防腐特性，使其成为一种性能优良并十分耐用的室外防水防腐建材，因而得到了越来越广泛的应用。但是传统的木塑复合板在自身结构强度、承载能力、抗压抗变形能力等方面还存在一定的欠缺，同时还存在热胀冷缩和较容易断裂的通病。
发明内容
本发明要解决的技术问题是针对现有技术的缺陷，提供一种内嵌金属板的复合地板，其通过在地板中部内嵌金属板材复合成型，可增强板材结构强度和承载力，并显著提升其抗变形能力。
为解决上述技术问题，本发明采用如下技术方案：
本发明提供了一种内嵌金属板的复合地板，包括包裹层、填充层和金属板，所述金属板内嵌于填充层之中，包裹层覆盖于填充层外，通过内嵌金属板提高板材的强度和承载力。
进一步地，所述金属板为沿横向呈弯曲或弯折的凹凸相间结构，所述金属板沿包裹层横向延伸，包括若干个交错凸起部和凹陷部。通过弯曲或弯折凹凸 造型的金属板升整体复合地板的受力能力，多点受力分散压力，减小局部压力，提高整体复合地板的抗压能力。
进一步地，所述填充层中开设有若干个通孔。所述若干个通孔与金属板相互交错，分别开设于凸起部和凹陷部内。通过若干个通孔减小地板使用过程中因热胀冷缩产生的形变。
进一步地，所述金属板上开设有若干贯通孔，通过开设贯通孔减轻整体金属板的重量，减轻整体复合地板的重量，并使得金属板两端的填充层相互贯通。所述贯通孔沿金属板的凸部顶面、凹部底面及凹凸之间的过渡面设置，并且贯通孔沿金属板的纵向为对齐排列、横向为交错排列的均匀布置结构，以使复合地板具有更为均匀的结构强度和抗压抗变形性能。
进一步地，所述金属板沿横向呈波浪的弯曲型或槽状的弯折型结构。所述凸起部或凹陷的纵向截面呈梯形、弧形、三角形、方形、半圆形中任选一种或多种形状。
进一步地，所述复合地板的纵向至少一侧开设有安装槽，若干块复合地板通过所述安装槽相互扣合组装，便于地板的安装。
进一步地，所述填充层为发泡材料层，所述发泡材料其可选自聚氯乙烯(PVC)、聚丙烯(PP)或聚乙烯(PE)中任选一种或多种；所述包裹层为木纹层或仿真木纹层，其由改性树脂组成，所述改性树脂包括ASA树脂或丙二醇甲醚醋酸酯(PMA)，所述发泡材料与改性树脂在高温下混合分层共挤制成。
与现有技术相比，本发明一种内嵌金属板的复合地板，通过在填充层中内嵌金属板，相当于地板的龙骨，显著提升整体复合地板的抗压能力和承载力，解决了复合地板易受压断裂的问题。另外，在填充层中开设有若干个通孔，通过通孔使得填充层的发泡材料具有更好的透气性，解决了复合地板的热胀冷缩而断裂的问题。金属板沿横向呈波浪的弯曲型或槽状的弯折型结构，可多点均匀受力，提升整体复合地板的抗压能力。通过内衬压型金属板可增强板材的结构强度、抗压、抗变形和承载能力，解决木塑地板易变型、热胀冷缩和断裂的 问题。通过共挤工艺形成内衬压型金属板，使产品显著提升抗压形变的性能，通过填充阻燃性良好的PVC等发泡材料，提高地板的抗紫外性能、耐候性、耐酸碱性、防腐蚀、耐磨性能等，并且不会褪色，终身免维护，可广泛适用于栈道、公园等户外场所的装饰地板。
附图说明
图1为本发明内嵌金属板的复合地板的实施例一的立体图；
图2为本发明内嵌金属板的复合地板实施例一金属板的立体图；
图3为本发明内嵌金属板的复合地板实施例一的A-A截面图；
图4为本发明内嵌金属板的复合地板的实施例二的立体图；
图5为本发明内嵌金属板的复合地板实施例二金属板的立体图；
图6为本发明内嵌金属板的复合地板的实施例三的立体图；
图7为本发明内嵌金属板的复合地板实施例三金属板的立体图。
图中，1为包裹层，2为填充层，3为金属板，4为通孔，5为贯通孔，6为凸起部，7为凹陷部，8为安装槽。
具体实施方式
参照图1-7，本发明提供了一种内嵌金属板的复合地板，包括包裹层1、填充层2和金属板3，所述金属板3内嵌于填充层1之中，包裹层1覆盖于填充层2外，通过内嵌金属板3提高板材的强度和承载力。本发明复合地板可应用在室外地面，进行装饰景观，如公园、栈道等户外地面。
所述金属板3为沿横向呈弯曲或弯折的凹凸相间结构，所述金属板3沿包裹层1横向延伸，包括若干个交错凸起部6和凹陷部7,通过弯曲或弯折凹凸造型的金属板3升整体复合地板的受力能力，多点受力分散压力，减小局部压力，提高整体复合地板的抗压能力。
所述填充层1中开设有若干个通孔4,所述若干个通孔4与金属板3相互交 错，分别开设于凸起部6和凹陷部7内,通过若干个通孔4减小地板使用过程中因热胀冷缩产生的形变，也可以节约制备填充层1的材料，降低成本，以及减轻地板的重量。
参照图2所示，所述金属板3上开设有若干贯通孔5，通过开设贯通孔5减轻整体金属板3的重量，减轻整体复合地板的重量，并使得金属板3两端的填充层1相互贯通，形成一体结构；如果不设置贯通孔5，则填充层1会被金属板3分隔成基本分开的上下两部分，设置贯通孔5有利于保持填充层1的完整性、提高填充层1的结构强度及抗压抗变形性能以及防断裂性能。所述贯通孔5沿金属板3的凸部顶面、凹部底面及凹凸之间的过渡面设置，并且贯通孔5沿金属板3的纵向为对齐排列、横向为交错排列的均匀布置结构，以使复合地板具有更为均匀的结构强度和抗压抗变形性能。
所述贯通孔5等间距地开设于金属板3的凸起部6和凹陷部7的各侧面上，通过均匀等距开设的贯通孔5将填充层1连通，并均匀分担所受压力。
参照图1-3，在本发明实施例一中，所述金属板3沿横向设置呈槽状的弯折型结构，其凸起部6或凹陷部7的纵向截面均设置为梯形状，所述凸起部6的梯形状面积可以设置大于或等于凹陷部7的梯形状面积。所述通孔4分别贯通开设于凸起部6和凹陷部7中。
参照图4-5，在本发明实施例二中，所述金属板3沿横向设置呈波浪的弯曲型结构，其凸起部6或凹陷部7的纵向截面均设置为弧形状，凸起部6与凹陷部7的纵向截面的面积相等或不等均可。所述通孔4分别贯通开设于凸起部6和凹陷部7中。
参照图6-7，在本发明实施例三中，所述金属板3还可以沿横向设置呈若干个三角形结构，其中，凸起部6和凹陷部7的纵向截面为三角形结构。所述通孔4分别贯通开设于凸起部6和凹陷部7中。
在本发明中，所述金属板3的纵向截面造型可为各种凹凸交错的造型，除了上述梯形、弧形、三角形，还可为方形、半圆形中任选一种或多种形状。通 过对称交错的凸起部和凹陷部，均匀分散复合地板受力，提高其整体承载力和抗形变能力，解决局部压力过大造成变形的问题。
所述复合地板的纵向至少一侧开设有安装槽8，若干块复合地板通过所述安装槽8相互扣合组装，便于地板的安装，多块复合地板通过安装槽8相互扣合嵌套而组合拼装在一起。
所述填充层1为发泡材料层，所述发泡材料其可选自阻燃性良好的材料作为基材，选自聚氯乙烯(PVC)、聚丙烯(PP)或聚乙烯(PE)中任选一种或多种；所述包裹层1为木纹层或仿真木纹层，其由改性树脂组成，所述改性树脂包括ASA树脂或丙二醇甲醚醋酸酯(PMA)，所述发泡材料与改性树脂在高温下混合分层共挤制成。选用塑料中先天阻燃的PVC发泡材料作为基材，经过材料改性、加入木纤维交织聚酯纤维，包裹层为ASA或PMA共挤材料，通过三层共挤成型，内衬压型钢板，包裹层形成各式木纹。
以上已将本发明做一详细说明，以上所述，仅为本发明之较佳实施例而已，当不能限定本发明实施范围，即凡依本申请范围所作均等变化与修饰，皆应仍属本发明涵盖范围内。

Claims (10)

  1. 一种内嵌金属板的复合地板，其特征在于：包括包裹层、填充层和金属板，所述金属板内嵌于填充层之中，包裹层覆盖于填充层外。
  2. 根据权利要求1所述的内嵌金属板的复合地板，其特征在于：所述金属板为沿横向呈弯曲或弯折的凹凸相间结构。
  3. 根据权利要求2所述的内嵌金属板的复合地板，其特征在于：所述金属板沿包裹层横向延伸，包括若干个交错凸起部和凹陷部。
  4. 根据权利要求1或3所述的内嵌金属板的复合地板，其特征在于：所述填充层中开设有若干个通孔。
  5. 根据权利要求4所述的内嵌金属板的复合地板，其特征在于：所述若干个通孔与金属板相互交错，分别开设于凸起部和凹陷部内。
  6. 根据权利要求1所述的内嵌金属板的复合地板，其特征在于：所述金属板上开设有若干贯通孔。
  7. 根据权利要求1所述的内嵌金属板的复合地板，其特征在于：所述金属板沿横向呈波浪的弯曲型或槽状的弯折型结构。
  8. 根据权利要求3所述的内嵌金属板的复合地板，其特征在于：所述凸起部或凹陷部的纵向截面呈梯形、弧形、三角形、方形、半圆形中任选一种或多种形状。
  9. 根据权利要求1所述的内嵌金属板的复合地板，其特征在于：所述复合地板的纵向至少一侧开设有安装槽，若干块复合地板通过所述安装槽相互扣合组装。
  10. 根据权利要求1所述的内嵌金属板的复合地板，其特征在于：所述填充层为发泡材料层，所述发泡材料其可选自聚氯乙烯(PVC)、聚丙烯(PP)或聚乙烯(PE)中任选一种或多种；所述包裹层为木纹层或仿真木纹层，其由改性树脂组成，所述改性树脂包括ASA树脂或丙二醇甲醚醋酸酯(PMA)，所述发泡材料与改性树脂在高温下混合分层共挤制成。
PCT/CN2021/082605 2020-09-10 2021-03-24 一种内嵌金属板的复合地板 WO2022052444A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572857A (en) * 1984-02-15 1986-02-25 N.V. Maatschappij Voor Studie, Bijstand En Onderzoek "M.S.B.O." Insulating board of composite material
JPH02161061A (ja) * 1988-12-13 1990-06-20 Eidai Co Ltd 床基材
CN105756320A (zh) * 2016-02-01 2016-07-13 上海海兴塑业有限公司 户外地板及其制造方法
CN206722204U (zh) * 2017-05-24 2017-12-08 朱丕洪 新型复合墙地板
CN207392676U (zh) * 2017-07-05 2018-05-22 苏州工业园区百晟电器有限公司 一种塑木铝合金复合地板
CN111910882A (zh) * 2020-09-10 2020-11-10 曹友国 一种复合式钢塑地板

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572857A (en) * 1984-02-15 1986-02-25 N.V. Maatschappij Voor Studie, Bijstand En Onderzoek "M.S.B.O." Insulating board of composite material
JPH02161061A (ja) * 1988-12-13 1990-06-20 Eidai Co Ltd 床基材
CN105756320A (zh) * 2016-02-01 2016-07-13 上海海兴塑业有限公司 户外地板及其制造方法
CN206722204U (zh) * 2017-05-24 2017-12-08 朱丕洪 新型复合墙地板
CN207392676U (zh) * 2017-07-05 2018-05-22 苏州工业园区百晟电器有限公司 一种塑木铝合金复合地板
CN111910882A (zh) * 2020-09-10 2020-11-10 曹友国 一种复合式钢塑地板

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