WO2021097861A1 - 一种防潮地板 - Google Patents

一种防潮地板 Download PDF

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Publication number
WO2021097861A1
WO2021097861A1 PCT/CN2019/120640 CN2019120640W WO2021097861A1 WO 2021097861 A1 WO2021097861 A1 WO 2021097861A1 CN 2019120640 W CN2019120640 W CN 2019120640W WO 2021097861 A1 WO2021097861 A1 WO 2021097861A1
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pvc
sound
board
absorbing
moisture
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PCT/CN2019/120640
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English (en)
French (fr)
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张小民
刘文涛
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清远市快地新型建材有限公司
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Publication of WO2021097861A1 publication Critical patent/WO2021097861A1/zh

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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
    • 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
    • E04F15/00Flooring
    • E04F15/18Separately-laid insulating layers; Other additional insulating measures; Floating floors
    • E04F15/181Insulating layers integrally formed with the flooring or the flooring elements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00Flooring
    • E04F15/18Separately-laid insulating layers; Other additional insulating measures; Floating floors
    • E04F15/20Separately-laid insulating layers; Other additional insulating measures; Floating floors for sound insulation
    • E04F15/206Layered panels for sound insulation
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2290/00Specially adapted covering, lining or flooring elements not otherwise provided for
    • E04F2290/04Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire
    • E04F2290/041Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire against noise
    • E04F2290/043Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire against noise with a bottom layer for sound insulation

Definitions

  • the invention relates to the technical field of flooring, in particular to a moisture-proof floor.
  • PVC board is a sheet made of PVC as raw material. It is used for the surface packaging of various panels, so it is also called decorative film and adhesive film, which is used in many industries such as building materials, packaging, and medicine.
  • the existing PVC floor is mainly made of PVC material, or the PVC board is fixed on the floor substrate, and the property of the PVC material is used to realize the function of moisture-proof, and the moisture-proof effect is poor.
  • the purpose of the present invention is to provide a moisture-proof floor with good moisture-proof effect.
  • the present invention provides a moisture-proof floor, including a substrate, on which a first PVC board and a second PVC board are arranged in order from top to bottom, and a second PVC board arranged on the bottom of the substrate.
  • the third PVC board is a composite board co-extruded from PVC material and moisture-proof material
  • a PVC film is also arranged on the upper side of the first PVC board
  • a water guide groove is formed on the PVC film, so A sound-absorbing layer is also arranged between the first PVC board and the second PVC board.
  • the moisture-proof material is sepiolite.
  • the sound-absorbing layer includes a sound-absorbing board, the sound-absorbing board is provided with a plurality of sound-absorbing cavities, the sound-absorbing cavities are filled with sound-absorbing materials, and a sound-absorbing board is arranged on the sound-absorbing material in the sound-absorbing chambers, Honeycomb-shaped sound-absorbing holes are formed in the sound-absorbing board.
  • the muffler cavity includes a first muffler cavity with a cavity opening facing the first PVC board and a second muffler cavity with a cavity opening facing the second PVC board.
  • the space is used to form a cavity with the first PVC board or the second PVC board.
  • the first silencing cavity and the second silencing cavity are alternately arranged.
  • the sound-absorbing material is rubber particles.
  • the sound-absorbing board is a foam board.
  • a wear-resistant layer is further arranged on the first PVC board, and the PVC film is arranged on the wear-resistant layer.
  • the moisture-proof floor of the embodiment of the present invention has the beneficial effect that: a water guide groove is arranged on the first PVC board, and the water guide groove can guide water to one side of the ground or near the sewer, so as to avoid water on the floor. Accumulation; A third PVC board is arranged at the bottom of the base plate.
  • the third PVC board is a composite board co-extruded from PVC material and moisture-proof material.
  • the moisture-proof material can absorb the permeating moisture.
  • the combination of the water channel and the moisture-proof material can play a good role.
  • the moisture-proof effect improves the moisture-proof effect of the floor; at the same time, a sound-absorbing layer is arranged between the first PVC board and the second PVC board, which can improve the sound-absorbing effect of the floor.
  • Figure 1 is a schematic structural diagram of a moisture-proof floor according to an embodiment of the present invention.
  • Fig. 2 is an enlarged schematic diagram of the position A of the moisture-proof floor of Fig. 1.
  • base plate 2. first PVC board; 3. second PVC board; 4. sound-absorbing board; 5. sound-absorbing material; 6. sound-absorbing board; 7. wear-resistant layer; 71. water channel; 8. Three PVC boards.
  • the moisture-proof floor includes a wear-resistant layer 7, a first PVC board 2, a sound-absorbing board 4, and a second PVC board from top to bottom. 3 and the base plate 1, the wear-resistant layer 7, the first PVC plate 2, the sound-absorbing plate 4, the second PVC plate 3 and the base plate 1 are formed by a hot pressing process.
  • the substrate can be a wood board, bamboo board and other material boards.
  • the wear-resistant layer 7 can increase the wear resistance of the floor and prolong the service life of the floor.
  • aluminum oxide powder is added to the wear-resistant layer 7 to increase Wear resistance of the wear layer 7.
  • the first PVC board 2, the sound-absorbing board 4 and the second PVC board 3 are arranged on the base plate 1 from top to bottom.
  • the outer surface of the first PVC board 2 is a rough surface, and the rough surface has a better sound absorption effect.
  • the material of the first PVC board 2 and the second PVC board 3 is an existing PVC board structure, which will not be described in detail here.
  • the material of the silencer board 4 is polyurethane foam board.
  • the silencer board 4 is provided with silencer cavities.
  • the silencer cavities are evenly distributed on the upper and lower sides of the silencer board 4.
  • the silencer cavity above the silencer board 4 is defined as the first silencer cavity and is located on the silencer board. 4
  • the lower silencing cavity is the second silencing cavity.
  • the opening of the first silencing cavity faces the first PVC plate 2
  • the opening of the second silencing cavity faces the second PVC plate 3.
  • the first silencing cavity and the second silencing cavity are alternately arranged , So as to enhance the structural strength of the sound-absorbing board 4 while ensuring the sound absorption effect.
  • Both the first muffler cavity and the second muffler cavity are filled with sound-absorbing material 5.
  • the sound-absorbing material 5 is rubber particles, and the rubber particles are used as the sound-absorbing material 5 and the structure is fluffy, and the gaps between different rubber particles are available. The reciprocating transmission of sound reduces the transmission energy of the sound and produces a sound absorption effect.
  • Sound-absorbing panels 6 are arranged in the first and second silencing chambers, respectively, and the sound-absorbing panels 6 are arranged above the sound-absorbing material 5.
  • the sound-absorbing panels 6 are foam panels, the foam panels are honeycomb structures, and the sound-absorbing panels 6 are formed with honeycombs. Sound-absorbing holes, honeycomb-shaped sound-absorbing holes allow sound to oscillate back and forth in the sound-absorbing holes to reduce the energy of the sound.
  • a cavity is formed between the second PVC boards 3, and the sound can reciprocate in the cavity to reduce energy and produce a sound-absorbing effect.
  • the sound-absorbing board 4, the sound-absorbing material 5 and the sound-absorbing board 6 jointly form a sound-absorbing layer.
  • the surface of the wear-resistant layer 7 is also hot-pressed with a PVC film.
  • the PVC film is formed with water guiding grooves 71.
  • the water guiding grooves 71 can guide water to the ground. On one side or near the sewer, avoid water accumulation on the floor, which has the effect of waterproof and moisture-proof.
  • a third PVC board 8 is also arranged at the bottom of the base plate 1.
  • the third PVC board 8 is co-extruded with PVC material and moisture-proof material.
  • the moisture-proof material of the third PVC board 8 is sepiolite, and the PVC material And sepiolite is conveyed through the different inlets of two calenders and then compressed and molded.
  • the water absorption effect of sepiolite can absorb the penetrated water and increase the moisture-proof effect of the floor.
  • the embodiments of the present invention provide a moisture-proof floor, which is provided with a water guide groove on the first PVC board, and the water guide groove can guide water to one side of the ground or near the sewer to prevent water from accumulating on the floor; at the bottom of the substrate A third PVC board is arranged.
  • the third PVC board is a composite board co-extruded from PVC material and moisture-proof material.
  • the moisture-proof material can absorb the permeating moisture.
  • the combination of the water channel and the moisture-proof material can play a good moisture-proof effect and improve the floor's performance.
  • Moisture-proof effect at the same time, a sound-absorbing layer is arranged between the first PVC board and the second PVC board, which can improve the sound absorption effect of the floor.

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

Abstract

本发明涉及地板技术领域,公开了一种防潮地板。防潮地板包括基板,所述基板上由上至下布置依次布置有第一PVC板和第二PVC板,还包括布置在所述基板的底部的第三PVC板,所述第三PVC板为由PVC材料和防潮材料共挤成型的复合板,所述第一PVC板的上侧还布置有PVC膜,所述PVC膜上成型有导水槽,所述第一PVC板和第二PVC板之间还布置有消音层。在第一PVC板上布置有导水槽,导水槽可将水导向地面的一侧或者下水道附近,避免水在地板上积累;在基板的底部布置有第三PVC板,第三PVC板为由PVC材料和防潮材料共挤成型的复合板,防潮材料可以吸收渗透的水分,导水槽和防潮材料配合可以起到良好的防潮作用,提高地板的防潮效果。

Description

一种防潮地板 技术领域
本发明涉及地板技术领域,特别是涉及一种防潮地板。
背景技术
在地面建材及各种装饰领域中,人们对地面材料的吸音、保温、防潮要求日益提高,防潮地板成了人们日益不可或缺的要求,但目前市场所销售的复合地板是橡胶、EVA聚乙烯发泡吸音层或软木与PVC弹性地板复合。
PVC板是以PVC为原料制成的板材,用于各类面板的表层包装,所以又被称为装饰膜、附胶膜,应用于建材、包装、医药等诸多行业。现有的PVC地板主要由PVC材料制成,或者将PVC板固定在地板基材上,利用PVC材料自身的性质实现防潮的功能,防潮效果差。
发明内容
本发明的目的是:提供一种防潮效果好的防潮地板。
为了实现上述目的,本发明提供了一种防潮地板,包括基板,所述基板上由上至下布置依次布置有第一PVC板和第二PVC板,还包括布置在所述基板的底部的第三PVC板,所述第三PVC板为由PVC材料和防潮材料共挤成型的复合板,所述第一PVC板的上侧还布置有PVC膜,所述PVC膜上成型有导水槽,所述第一PVC板和第二PVC板之间还布置有消音层。
优选地,所述防潮材料为海泡石。
优选地,所述导水槽平行布置有多条,多条导水槽间隔均匀布置。
优选地,所述消音层包括消音板,所述消音板上开设有若干个消音腔,所述消音腔内填充有吸音材料,所述消音腔内于所述吸音材料 上还布置有吸音板,所述吸音板内形成有蜂窝形的吸音孔。
优选地,所述消音腔包括腔口朝向第一PVC板的第一消音腔和腔口朝向第二PVC板的第二消音腔。
优选地,所述吸音板与所述消音腔的腔口所在平面之间具有间隔,所述间隔用于与所述第一PVC板或第二PVC板形成空腔。
优选地,所述第一消音腔和第二消音腔交替布置。
优选地,所述吸音材料为橡胶颗粒。
优选地,所述吸音板为泡沫板。
优选地,所述第一PVC板上还布置有耐磨层,所述PVC膜布置在所述耐磨层上。
本发明实施例一种防潮地板与现有技术相比,其有益效果在于:在第一PVC板上布置有导水槽,导水槽可将水导向地面的一侧或者下水道附近,避免水在地板上积累;在基板的底部布置有第三PVC板,第三PVC板为由PVC材料和防潮材料共挤成型的复合板,防潮材料可以吸收渗透的水分,导水槽和防潮材料配合可以起到良好的防潮作用,提高地板的防潮效果;同时在第一PVC板与第二PVC板之间布置有消音层,可以提高地板的吸音效果。
附图说明
图1是本发明实施例的防潮地板的结构示意图;
图2是图1的防潮地板的A处的放大示意图。
图中,1、基板;2、第一PVC板;3、第二PVC板;4、消音板;5、吸音材料;6、吸音板;7、耐磨层;71、导水槽;8、第三PVC板。
具体实施方式
下面结合附图和实施例,对本发明的具体实施方式作进一步详细描述。以下实施例用于说明本发明,但不用来限制本发明的范围。
本发明的一种防潮地板的优选实施例,如图1与图2所示,该防潮地板包括由上至下依次包括耐磨层7、第一PVC板2、消音板4、第 二PVC板3和基板1,耐磨层7、第一PVC板2、消音板4、第二PVC板3和基板1之间采用热压工艺成型。基板可以为木板、竹板等材料板,耐磨层7可以增加地板的耐磨性,延长地板的使用寿命,在本实施例中,耐磨层7内添加了三氧化二铝粉末,以增加耐磨层7的耐磨性。
第一PVC板2、消音板4和第二PVC板3由上至下依次布置在基板1上,第一PVC板2的外表面为粗糙面,粗糙面具有更好的吸音效果。第一PVC板2和第二PVC板3的材质为现有的PVC板结构,此处不做详细叙述。
消音板4的材质为聚氨酯泡沫板,消音板4上开设有消音腔,消音腔均匀分布之在消音板4的上下两面,定义位于消音板4上面的消音腔为第一消音腔,位于消音板4下面的消音腔为第二消音腔,第一消音腔的腔口朝向第一PVC板2,第二消音腔的腔口朝向第二PVC板3,第一消音腔和第二消音腔交替布置,以在保证吸音效果的同时可以增强消音板4的结构强度。
第一消音腔和第二消音腔内均填充有吸音材料5,在本实施例中,吸音材料5为橡胶颗粒,橡胶颗粒作为吸音材料5后结构蓬松,不同的橡胶颗粒之间的间隙可供声音往复传递,减少声音的传递能量,产生吸音的效果。
第一消音腔、第二消音腔内分别布置有吸音板6,吸音板6布置在吸音材料5的上方,吸音板6为泡沫板,泡沫板为蜂窝结构,吸音板6内形成有蜂窝形的吸音孔,蜂窝形的吸音孔可供声音在吸音孔内来回震荡以减少声音的能量。吸音板6与第一消音腔的腔口所在平面、第二消音腔的腔口所在平面之间均具有间隔,即吸音板6低于消音腔的腔口所在平面,间隔与第一PVC板2、第二PVC板3之间形成空腔,声音可在空腔内往复以减少能量,产生吸音的效果,消音板4、吸音材料5和吸音板6共同形成吸音层。
耐磨层7的表面还热压有PVC膜,PVC膜上成型有导水槽71,导 水槽71平行布置有多条,多条导水槽71之间间隔布置,导水槽71可以将水导向地面的一侧或者下水道附近,避免水在地板上积累,具有防水防潮的效果。
基板1的底部还布置有第三PVC板8,第三PVC板8由PVC材料和防潮材料共挤成型,在本实施例中,第三PVC板8的防潮材料为海泡石,将PVC材料和海泡石通过两个压延机的不同进料口输送后进行压缩成型,利用海泡石的吸水效果可以吸收渗透的水分,增加地板的防潮效果。
综上,本发明实施例提供一种防潮地板,其在第一PVC板上布置有导水槽,导水槽可将水导向地面的一侧或者下水道附近,避免水在地板上积累;在基板的底部布置有第三PVC板,第三PVC板为由PVC材料和防潮材料共挤成型的复合板,防潮材料可以吸收渗透的水分,导水槽和防潮材料配合可以起到良好的防潮作用,提高地板的防潮效果;同时在第一PVC板与第二PVC板之间布置有消音层,可以提高地板的吸音效果。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和替换,这些改进和替换也应视为本发明的保护范围。

Claims (10)

  1. 一种防潮地板,其特征在于,包括基板,所述基板上由上至下布置依次布置有第一PVC板和第二PVC板,还包括布置在所述基板的底部的第三PVC板,所述第三PVC板为由PVC材料和防潮材料共挤成型的复合板,所述第一PVC板的上侧还布置有PVC膜,所述PVC膜上成型有导水槽,所述第一PVC板和第二PVC板之间还布置有消音层。
  2. 根据权利要求1所述的防潮地板,其特征在于,所述防潮材料为海泡石。
  3. 根据权利要求1所述的防潮地板,其特征在于,所述导水槽平行布置有多条,多条导水槽间隔均匀布置。
  4. 根据权利要求1-3任一项所述的防潮地板,其特征在于,所述消音层包括消音板,所述消音板上开设有若干个消音腔,所述消音腔内填充有吸音材料,所述消音腔内于所述吸音材料上还布置有吸音板,所述吸音板内形成有蜂窝形的吸音孔。
  5. 根据权利要求4所述的防潮地板,其特征在于,所述消音腔包括腔口朝向第一PVC板的第一消音腔和腔口朝向第二PVC板的第二消音腔。
  6. 根据权利要求5所述的防潮地板,其特征在于,所述吸音板与所述消音腔的腔口所在平面之间具有间隔,所述间隔用于与所述第一PVC板或第二PVC板形成空腔。
  7. 根据权利要求5所述的防潮地板,其特征在于,所述第一消音腔和第二消音腔交替布置。
  8. 根据权利要求4所述的防潮地板,其特征在于,所述吸音材料为橡胶颗粒。
  9. 根据权利要求4所述的防潮地板,其特征在于,所述吸音板为泡沫板。
  10. 根据权利要求1-3任一项所述的防潮地板,其特征在于,所述第一PVC板上还布置有耐磨层,所述PVC膜布置在所述耐磨层上。
PCT/CN2019/120640 2019-11-18 2019-11-25 一种防潮地板 WO2021097861A1 (zh)

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CN201911138133.4A CN110735512A (zh) 2019-11-18 2019-11-18 一种防潮地板
CN201911138133.4 2019-11-18

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Publication number Priority date Publication date Assignee Title
CN111997297A (zh) * 2020-08-17 2020-11-27 沈建英 一种新风复合pvc地板

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105604298A (zh) * 2016-02-24 2016-05-25 浙江海利得新材料股份有限公司 一种柔性静音自沉式止滑地板
US20160273231A1 (en) * 2016-05-06 2016-09-22 Guodong Jiang Non-toxic, highly representational vinyl flooring article
CN106223570A (zh) * 2016-08-31 2016-12-14 阿姆斯壮(中国)投资有限公司 一种平衡结构可移动式环保地板及其安装方法
CN205875600U (zh) * 2016-07-20 2017-01-11 河北浩康工艺塑胶制品有限公司 一种排水性强的运动地板
CN108331294A (zh) * 2018-04-02 2018-07-27 江苏福瑞森塑木科技股份有限公司 一种低吸水率高抗冲塑木地板
CN208267277U (zh) * 2018-05-31 2018-12-21 焦作市富泉塑胶有限公司 一种pvc复合吸音装饰板
CN110185231A (zh) * 2019-05-17 2019-08-30 安徽优胜美塑胶有限公司 一种改性ixpe防滑静音石塑地板及其生产工艺

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105604298A (zh) * 2016-02-24 2016-05-25 浙江海利得新材料股份有限公司 一种柔性静音自沉式止滑地板
US20160273231A1 (en) * 2016-05-06 2016-09-22 Guodong Jiang Non-toxic, highly representational vinyl flooring article
CN205875600U (zh) * 2016-07-20 2017-01-11 河北浩康工艺塑胶制品有限公司 一种排水性强的运动地板
CN106223570A (zh) * 2016-08-31 2016-12-14 阿姆斯壮(中国)投资有限公司 一种平衡结构可移动式环保地板及其安装方法
CN108331294A (zh) * 2018-04-02 2018-07-27 江苏福瑞森塑木科技股份有限公司 一种低吸水率高抗冲塑木地板
CN208267277U (zh) * 2018-05-31 2018-12-21 焦作市富泉塑胶有限公司 一种pvc复合吸音装饰板
CN110185231A (zh) * 2019-05-17 2019-08-30 安徽优胜美塑胶有限公司 一种改性ixpe防滑静音石塑地板及其生产工艺

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