Easy-to-disassemble and reusable soundproof self-adhesive floorboard, and preparation and use method therefor

Abstract

The present invention provides an easy-to-disassemble and reusable soundproof self-adhesive floorboard, comprising, sequentially from top to bottom, a floor layer, a first adhesive layer, a soundproof layer, a second adhesive layer, and a release layer. The adhesion strength between the first adhesive layer and the soundproof layer is greater than the adhesion strength between the second adhesive layer and the ground; the tear strength of the soundproof layer is greater than the adhesion strength between the second adhesive layer and the ground; the soundproof layer is prepared by a porous foaming material having no plasticizer; the pores of the soundproof layer are not communicated with each other; and the upper surface and the lower surface of the soundproof layer each have a continuous non-porous skin-layer structure.

Description

Easy-to-disassemble and Reinstall Soundproof Self-adhesive Floor and Its Preparation and Use Methods Technical Field The present invention relates to an easy-to-disassemble and reinstall soundproof self-adhesive floor and its preparation and use methods. Background Art Traditional plastic soundproof floors are installed as follows: First, a water-based pressure-sensitive adhesive is coated on the ground; after the moisture evaporates, the floor is laid on the ground coated with the adhesive; after waiting for 24 to 72 hours, the adhesive dries, thereby fixing the floor. If the floor is not laid ideally, the installed floor needs to be pried up and reinstalled. However, when replacing the floor, a part of the pressure-sensitive adhesive will remain at the bottom of the floor, and another part of the pressure-sensitive adhesive will remain on the ground, so it is necessary to clean the bottom of the floor and clean or repair the ground at the same time, which greatly affects the reinstallability of the floor. In extreme cases, when prying up the soundproof floor, the soundproof pad under the floor will also fall off, which will cause the pried-up floor to be unable to be reused, resulting in great economic losses. Therefore, it has become increasingly urgent to develop an easy-to-disassemble and reinstall soundproof self-adhesive floor. In addition, Chinese Patent Application CN 102454278A and its European counterpart patent application EP 2,447,054 disclose a self-adhesive floor tile, which includes a main body and a self-adhesive layer connected to the main body. The self-adhesive layer includes an adsorbent, a first adhesive, and a second adhesive. The first adhesive connects the main body and the self-adhesive layer, and at least a part of the adsorbent extends into the first adhesive. At least a part of the second adhesive penetrates into the adsorbent and is used to connect the self-adhesive layer to a to-be-laid member. The adsorbent is a porous or capillary-structured object (please refer to paragraphs

[0008] and

[0010] of the specification of CN102454278A). Although this connected and through-type structure has satisfactory bonding performance in the short term, there is a risk of its durability. Over time, the plasticizer in the main body or the first adhesive will precipitate and penetrate into the adsorbent and the second adhesive, thereby affecting the cohesion of the second adhesive and causing the phenomenon of degradation and aging. When the floor is pried up and reinstalled, due to aging, the second adhesive will break and remain on the floor and the ground at the same time, affecting the reinstallability. However, there is no report related to an easy-to-disassemble and reinstall soundproof self-adhesive floor in the prior art. In view of this, there is an urgent need in the art to find an easy-to-disassemble and reinstall soundproof self-adhesive floor. Summary of the Invention The present invention provides a silent self - adhesive floor that is easy to disassemble and reassemble, which sequentially includes from top to bottom: a floor layer, a first adhesive layer, a sound - proof layer, a second adhesive layer, and a release layer. The adhesive strength between the first adhesive layer and the sound - proof layer is greater than the adhesive strength between the second adhesive layer and the ground. The breaking strength of the sound - proof layer is greater than the adhesive strength between the second adhesive layer and the ground. The sound - proof layer is prepared from a porous foaming material without plasticizer, and the pores of the sound - proof layer are not connected to each other. Both the upper and lower surfaces of the sound - proof layer have a continuous and pore - free cortical structure. The present invention also provides a method for preparing the silent self - adhesive floor that is easy to disassemble and reassemble according to the present invention. The method includes: Preparing the sound - proof layer; Bonding the sound - proof layer and the floor layer through the first adhesive layer; Applying the second adhesive layer to the side of the sound - proof layer opposite to the first adhesive layer; and Attaching the release layer to the second adhesive layer; Or The method includes: Preparing the sound - proof layer; Bonding the sound - proof layer and the floor layer through the first adhesive layer; Applying the second adhesive layer to the release layer; and Adhering the release layer with the second adhesive layer to the side of the sound - proof layer opposite to the first adhesive layer, where the second adhesive layer is located between the release layer and the sound - proof layer. In addition, the present invention provides a method for using the silent self - adhesive floor that is easy to disassemble and reassemble according to the present invention. The method includes: Removing the release layer from the silent self - adhesive floor that is easy to disassemble and reassemble, and Bonding the silent self - adhesive floor with the release layer removed to the ground through the second adhesive layer. Surprisingly, the inventors found that for the easily disassembled and reinstallable silent self-adhesive floor of the present invention, the bonding strength between the first bonding layer and the silent layer is greater than the bonding strength between the second bonding layer and the ground, ensuring that when replacing the floor, the breakage occurs at the second bonding layer, thus guaranteeing the integrity of the floor during reinstallation; by the breakage strength of the silent layer being greater than the bonding strength between the second bonding layer and the ground, it is ensured that when the floor is pried up, the entire second bonding layer remains on the silent layer and does not remain on the ground, so that the pried-up floor can still be reused; by the silent layer being prepared from a porous foaming material without plasticizer, the pores of the silent layer not communicating with each other, and the upper and lower surfaces of the silent layer having a continuous pore-free cortical structure, it is possible to prevent the plasticizer (including polyvinyl chloride) in the floor layer from passing through the first bonding layer and the silent layer and affecting the cohesion of the second bonding layer (especially the hot melt pressure-sensitive adhesive), and to prevent the migration of small molecule additives in the system, further improving the stability of the second bonding layer (especially the pressure-sensitive adhesive) and the reinstallability of the floor. Brief Description of the Drawings Figure 1 depicts a schematic diagram of the layer structure of an embodiment of the easily disassembled and reinstallable silent self-adhesive floor of the present invention. Detailed Description of the Embodiments Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the definitions in this specification shall prevail. When numerical values or ranges of values, preferred ranges, or a series of lower preferred values and upper preferred values are given, it should be understood that all ranges formed by any pair of numerical values of any smaller range limit or preferred value and any larger range limit or preferred value are specifically disclosed, regardless of whether such specific ranges are explicitly disclosed one by one. Unless otherwise specified, when describing a numerical range in the present invention, the range is intended to include the end values of the range and all integers and fractions within the range. The terms "a" and "one / kind" are used to describe the elements and components of the present invention. This is only for convenience and to give a general situation of the present invention. Unless otherwise explicitly stated, this expression should be understood to include one / kind or at least one / kind. Unless otherwise clearly indicated to the contrary, the parameter measurement methods not specified in the description part of this specification are all carried out by the methods specifically described in the examples. The present invention provides a silent self-adhesive floor that is easy to disassemble and reassemble, which sequentially includes from top to bottom: a floor layer, a first adhesive layer, a sound insulation layer, a second adhesive layer, and a release layer. The adhesive strength between the first adhesive layer and the sound insulation layer is greater than the adhesive strength between the second adhesive layer and the ground. The breaking strength of the sound insulation layer is greater than the adhesive strength between the second adhesive layer and the ground. The sound insulation layer is prepared from a porous foaming material without a plasticizer, and the pores of the sound insulation layer are not connected to each other. Both the upper and lower surfaces of the sound insulation layer have a continuous and pore-free skin structure. In this article, the breaking strength of all sound insulation layers is obtained by referring to the peel force measurement method of EN 1372-2015 as follows: Cut the floor with the sound insulation layer into floor specimens with a length of 20 cm and a width of 5 cm; Coat the non-asbestos cement board (15 cm long, 5 cm wide, 1 cm thick) with strong glue (German Youcheng gr19) using a standard A4 scraper; Horizontally bond the above floor specimens to the above cement board coated with strong glue, so that one end of the specimen is exposed by 5 cm to facilitate the clamping of one end of the floor by the tensile machine fixture; Wait for 48 hours for the strong glue to cure; Finally, measure the minimum tensile force data measured when the sound insulation layer is broken in two by the adhesive force between the strong glue and the cement board, which is the breaking strength of the sound insulation layer. In this article, the adhesive strength and adhesive force between all the second adhesive layers and the ground can be used interchangeably, and they are all obtained by referring to the peel force measurement method of EN 1372-2015 as follows: Use a non-asbestos cement board (15 cm long, 5 cm wide, 1 cm thick) to simulate the ground, paste the easy-to-disassemble and reassemble silent self-adhesive floor on the cement board, and finally use a tensile machine (model: Haida International B614) to measure the tensile force between the wall floor and the cement board at a tensile speed of 2 mm / s to obtain the adhesive force between the second adhesive layer and the ground. The following describes each layer of the easy-to-disassemble and reassemble silent self-adhesive floor of the present invention separately. Floor layer The floor layer in the easy-to-disassemble and reassemble silent self-adhesive floor according to the present invention can be any floor known in the art as long as it can achieve the purpose of the present invention. Preferably, the floor layer includes polyvinyl chloride, polypropylene, polyethylene, polyurethane, polyester, and combinations thereof. More preferably, the main material of the floor layer is selected from polyvinyl chloride, polypropylene, polyethylene, polyurethane, polyester, and combinations thereof. Combination. Further preferably, the floor layer is a polyvinyl chloride or polypropylene floor. Alternatively or additionally, preferably the floor layer has a single-layer, double-layer, or more-layer structure. Preferably, the floor layer in the present invention is a PVC rigid floor produced by the full-automatic calendering method described in CN 110524998A or a lightweight and environmentally friendly polypropylene composite floor described in CN 108026730B. The entire disclosure content of these two patent documents is incorporated herein by reference. The first adhesive layer The first adhesive layer in the easily disassembled, reassembled, and soundproof self-adhesive floor according to the present invention can be prepared from any adhesive known in the art, as long as the adhesive strength between the first adhesive layer and the soundproof layer is greater than the adhesive strength between the second adhesive layer and the ground. Preferably, the first adhesive layer is prepared from a reactive adhesive, preferably a reactive structural adhesive. In a preferred embodiment of the present invention, the reactive adhesive is selected from one-component reactive polyurethane hot melt adhesives, two-component reactive acrylate or polyurethane adhesives, and combinations thereof. By using the above-preferred adhesives to prepare the first adhesive layer, the present invention can further reduce the risk of the soundproof layer peeling off from the floor layer when replacing the floor. The soundproof layer In the easily disassembled, reassembled, and soundproof self-adhesive floor according to the present invention, the breaking strength of the soundproof layer is greater than the adhesive strength between the second adhesive layer and the ground. The soundproof layer is prepared from a porous foamed material without a plasticizer. The pores of the soundproof layer are not connected to each other, and both the upper and lower surfaces of the soundproof layer have a continuous and pore-free skin structure. Preferably, the soundproof layer is prepared from a porous foamed material without polyvinyl chloride. More preferably, the soundproof layer is prepared from a material selected from porous foamed materials based on polyethylene, porous foamed materials based on polypropylene, and combinations thereof. Further preferably, the soundproof layer is prepared from radiation-crosslinked polyethylene and / or radiation-crosslinked polypropylene. In a preferred embodiment of the present invention, the foaming ratio of the porous foamed material is 5 to 30, preferably 5 to 25, more preferably 5 to 20, and further preferably 5 to 15. All the foaming ratios herein are calculated by the following formula: Foaming ratio = volume after foaming / original volume. The foaming ratio described herein is preferably determined as follows: Taking polyethylene (with a density of approximately 900 kg / m 3 ) as an example, the material to be tested is cut into a thickness of 1 mm and a length and width of 10 cm each, and weighed on an electronic balance. If the weight is 0.9 g ± 0.1 g, the foaming ratio of the material is 10. In another preferred embodiment of the present invention, the thickness of the porous foamed material is 0.5 to 2.0 mm, preferably 0.75 to 1.5 mm, and more preferably 1 mm. In a further preferred embodiment of the present invention, the sound insulation layer is prepared from a polyethylene-based porous foamed material with a foaming ratio of 5 to 12.5, more preferably 7.5 to 10, and / or a polypropylene-based porous foamed material with a foaming ratio of 8 to 15, more preferably 10 to 15. The following lists the parameters of the sound insulation layer examples available in the present invention: Preferably, the breaking strength of the sound insulation layer is greater than 4 N / cm. Alternatively or additionally, in a preferred embodiment of the present invention, the skin layer of the sound insulation layer is treated by corona, plasma and / or flame before bonding with the first adhesive layer and the second adhesive layer, preferably by corona treatment, so that the surface tension of the upper and lower surfaces of the sound insulation layer is equal to or greater than 38 dyn / cm before bonding with the first adhesive layer and the second adhesive layer. The surface tension of the upper and lower surfaces of all the sound insulation layers herein is measured by the following method before bonding with the first adhesive layer and the second adhesive layer: draw a line about 5 to 10 cm long on the sound insulation layer to be measured with an American accu dyno pen. If the pen ink drawn decreases instantaneously, that is, it wets the surface of the sound insulation layer within 2 seconds, it means that the surface tension of the sound insulation layer is less than the dyno value of the used dyno pen; if the pen ink drawn does not decrease, that is, it shrinks into a water droplet within 2 seconds, it means that the surface tension of the sound insulation layer is equal to or greater than the dyno value of the used dyno pen. Each dyno pen has a fixed dyno value, such as a dyno pen with a dyno value of 36 and a dyno pen with a dyno value of 38. In addition, the porous structure of the sound insulation layer also has the function of absorbing and blocking the propagation of sound, thereby improving the sound insulation effect of the floor itself. The second adhesive layer The second adhesive layer in the easily disassembled and reinstallable sound-insulating self-adhesive floor according to the present invention can be prepared from any adhesive known in the art, as long as the bonding strength between the second adhesive layer and the ground is less than the bonding strength between the first adhesive layer and the sound insulation layer and less than the breaking strength of the sound insulation layer. Preferably, the second adhesive layer is prepared from a pressure-sensitive adhesive. More preferably, the second adhesive layer contains an elastomeric pressure-sensitive adhesive or a resin-based pressure-sensitive adhesive. In a preferred embodiment of the present invention, the pressure-sensitive adhesive in the second adhesive layer is an aqueous, solvent-based or solvent-free pressure-sensitive adhesive. In another preferred embodiment of the present invention, the elastomeric pressure-sensitive adhesive is selected from natural rubber-based pressure-sensitive adhesives, synthetic rubber-based pressure-sensitive adhesives, synthetic thermoplastic elastomer-based pressure-sensitive adhesives, and combinations thereof. Preferably, the synthetic rubber-based pressure-sensitive adhesive is prepared from styrene-butadiene rubber, polyisoprene rubber, polyisobutylene rubber, butyl rubber, chloroprene rubber, and / or nitrile rubber as the main body, and tackifying resins, softeners, anti-aging agents, etc. as additives. More preferably, the synthetic rubber-based pressure-sensitive adhesive contains styrene-butadiene rubber, polyisobutylene rubber, butyl rubber, chloroprene rubber, and / or combinations thereof. Preferably, the synthetic thermoplastic elastomer-based pressure-sensitive adhesive contains styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, and / or combinations thereof as the main raw materials of the hot-melt pressure-sensitive adhesive. The hot-melt pressure-sensitive adhesive does not use solvents, so it does not pollute the environment and has high production efficiency. In still another preferred embodiment of the present invention, the resin-based pressure-sensitive adhesive is selected from polyacrylates, polyurethanes, polyvinyl ethers, vinyl acetate copolymers, polyesters, pressure-sensitive adhesives composed of a mixture of silicone resins and silicone rubbers, and combinations thereof. Preferably, the resin-based pressure-sensitive adhesive is a polyacrylate, especially an acrylate copolymer obtained by copolymerizing various acrylate monomers. Compared with the rubber-based pressure-sensitive adhesive, the polyacrylate pressure-sensitive adhesive has the following advantages: it is colorless and transparent in appearance and has good weather resistance; generally, good pressure-sensitive adhesives can be obtained without using additives such as tackifying resins, softeners, and anti-aging agents, so the formulation is simple; pressure-sensitive adhesives that meet various different performance requirements can be prepared by copolymerization and crosslinking. In addition, the pressure-sensitive adhesive composed of a mixture of silicone resins and silicone rubbers has excellent high-temperature resistance and aging resistance. Further preferably, the second adhesive layer in the easily disassembled and reinstallable silent self-adhesive floor according to the present invention is made of a styrene-isoprene-styrene block copolymer elastomeric pressure-sensitive adhesive and / or a resin-based polyacrylate pressure-sensitive adhesive. When the second adhesive layer of the present invention is made of one or both of these two pressure-sensitive adhesives, the target effects desired by the present invention are better. Preferably, the adhesion force between the second adhesive layer and the ground is 1.2 to 4 N / m. Release layer The release layer in the easily disassembled and reinstallable silent self-adhesive floor according to the present invention can be any release layer known in the art as long as it can achieve the purpose of the present invention. Preferably, the release layer is selected from polypropylene or polyester films coated with a release agent, release papers, and combinations thereof. Preferably, the polyester film is a polyethylene terephthalate film. Next, with reference to the accompanying drawings, an exemplary description of the layer structure of the easily disassembled and reinstallable silent self-adhesive floor of the present invention will be given. Figure 1 shows an embodiment of the easily disassembled and reinstallable silent self - adhesive floor of the present invention. The easily disassembled and reinstallable silent self - adhesive floor sequentially includes, from top to bottom: a floor layer, a first adhesive layer, a sound - insulating layer, a second adhesive layer, and a release layer. The present invention also provides a method for preparing the easily disassembled and reinstallable silent self - adhesive floor of the present invention, and the method includes: Preparing the sound - insulating layer; Bonding the sound - insulating layer and the floor layer through the first adhesive layer; Applying the second adhesive layer to the side of the sound - insulating layer opposite to the first adhesive layer; and Attaching the release layer to the second adhesive layer; Or The method includes: Preparing the sound - insulating layer; Bonding the sound - insulating layer and the floor layer through the first adhesive layer; Applying the second adhesive layer to the release layer; and Attaching the release layer with the second adhesive layer to the side of the sound - insulating layer opposite to the first adhesive layer, wherein the second adhesive layer is located between the release layer and the sound - insulating layer. Preferably, by subjecting the sound - insulating layer to corona, plasma, and / or flame treatment, preferably by subjecting the sound - insulating layer to corona treatment, the surface tension of both surfaces of the sound - insulating layer is greater than or equal to 38 dyn / cm. In addition, the present invention also provides a method for using the easily disassembled and reinstallable silent self - adhesive floor of the present invention, and the method includes: Removing the release layer from the easily disassembled and reinstallable silent self - adhesive floor, and Bonding the easily disassembled and reinstallable silent self - adhesive floor with the release layer removed to the ground through the second adhesive layer, preferably bonding it to a cement floor. The easily disassembled and reinstallable silent self-adhesive floor of the present invention ensures that when replacing the floor, the fracture occurs in the second adhesive layer by the adhesive strength between the first adhesive layer and the sound insulation layer being greater than the adhesive strength between the second adhesive layer and the ground, thus ensuring the integrity of the floor when reinstalling the floor; by the breaking strength of the sound insulation layer being greater than the adhesive strength between the second adhesive layer and the ground, it is ensured that when the floor is pried up, the second adhesive layer remains entirely on the sound insulation layer and does not remain on the ground, so that the pried-up floor can still be reused; by the sound insulation layer being prepared from a porous foaming material without plasticizer, the pores of the sound insulation layer not communicating with each other, and the upper and lower surfaces of the sound insulation layer having a continuous and pore-free cortical structure, it is possible to prevent the plasticizer (including polyvinyl chloride) in the floor layer from passing through the first adhesive layer and the sound insulation layer and affecting the cohesion of the second adhesive layer (especially the hot melt pressure-sensitive adhesive), and prevent the migration of small molecule additives in the system, further improving the stability of the second adhesive layer (especially the pressure-sensitive adhesive) and the reinstallability of the floor. Example The present invention will be illustrated by the following examples, but these examples are not intended to limit the present invention in any way. Example 1 The structure of the easily disassembled and reinstallable silent self-adhesive floor according to Example 1 of the present invention includes, from top to bottom: Floor layer: Rigid polyvinyl chloride floor, with a thickness of about 2 mm, prepared according to the specific method described in Example 1 of CN 110524998A; First adhesive layer: Two-component solvent-free polyurethane adhesive 9001, purchased from Wuxi Wanli Adhesive Materials Co., Ltd., 40 g / m 2 ; Sound insulation layer: Radiation-crosslinked polyethylene NMP-10010ka-174.6, foaming ratio: 10, thickness: 1 mm, breaking strength: 4.35 N / cm, purchased from Hubei Xiangyuan New Materials Co., Ltd., where the pores of the sound insulation layer do not communicate with each other and its upper and lower surfaces have a continuous and pore-free cortical structure; Second adhesive layer: Styrene-isoprene-styrene block copolymer hot melt pressure-sensitive adhesive FS1001, purchased from Zhongshan Chengtai Chemical Technology Co., Ltd., 30 g / m 2 ; and Release layer: 65 g single-silicon release paper (width 1300 mm), purchased from Kunshan Caiyi Paper and Plastic Products Co., Ltd. The easily disassembled and reinstallable silent self-adhesive floor according to Example 1 of the present invention is prepared as follows: 1. The two surfaces of the sound insulation layer of radiation-crosslinked polyethylene are both treated with corona at a speed of 25 m / min by a corona machine, so that the surface tension of the two surfaces of the sound insulation layer changes from about 36 dyn / cm to equal to or greater than 38 dyn / cm; 2. Bond the sound insulation layer and the floor layer with a two-component solvent-free polyurethane adhesive, and wait for 24 hours for the adhesive to cure to form a first bonding layer; 3. Heat the solvent-free styrene-isoprene-styrene block copolymer hot melt pressure-sensitive adhesive to about 140 °C to make it into a fluid, and coat it on the side of the sound insulation layer opposite to the first bonding layer to form a second bonding layer; 4. Attach a release paper to the second bonding layer. The sound insulation layer and the floor layer of the easily disassembled and reinstallable sound insulation self-adhesive floor sample of Example 1 were peeled off, and it was found that the sound insulation layer was damaged, indicating that the bonding strength between the first bonding layer and the sound insulation layer here is much greater than the breaking strength of the sound insulation layer. Example 2 The structure of the easily disassembled and reinstallable sound insulation self-adhesive floor according to Example 2 of the present invention sequentially includes from top to bottom: Floor layer: Polypropylene floor, with a thickness of about 2.5 mm, which is prepared according to the specific method described in the examples of CN 108026730B; First bonding layer: One-component reactive polyurethane hot melt adhesive, purchased from Henkel Corporation, model 9515, 30 g / m 2 ; Sound insulation layer: Radiation-crosslinked polypropylene NPP-10010ka-174.6, foaming ratio: 10, thickness: 1 mm, breaking strength: 5.4 N / cm, purchased from Hubei Xiangyuan New Materials Co., Ltd., wherein the pores of the sound insulation layer are not connected to each other and its upper and lower surfaces both have a continuous pore-free skin structure; Second bonding layer: Solvent-based polyacrylate pressure-sensitive adhesive F6A508, purchased from Ningbo Yongliu New Materials Technology Co., Ltd., 30 g / m 2 ; And Release layer: 50-μm-thick biaxially oriented polyester (BOPET) release film (width 1000 mm), purchased from Hangzhou Chengsheng Film Technology Co., Ltd. The easily disassembled and reinstallable sound insulation self-adhesive floor according to Example 2 of the present invention is prepared as follows: 1. The two surfaces of the sound insulation layer of radiation-crosslinked polypropylene are both treated with corona at a speed of 25 m / min by a corona machine, so that the surface tension of the two surfaces of the sound insulation layer changes from about 30 dyn / cm to equal to or greater than 38 dyn / cm; 2. Heat a one-component reactive polyurethane hot-melt adhesive (which is a solvent-free moisture-curing adhesive) to about 140 °C to melt it, and coat it on the back of the floor layer. Stick the sound insulation layer onto the adhesive and compact it within the open time of the adhesive; wait for 24 hours for the moisture in the air to react with the adhesive and the adhesive to cure to form a first bonding layer; 3. Coat a liquid polyacrylate adhesive onto a biaxially oriented polyester (BOPET) release film; 4. Stick the release film coated with the polyacrylate adhesive onto the sound insulation layer, where the polyacrylate adhesive is located between the release film and the sound insulation layer, on the side opposite to the first bonding layer of the sound insulation layer. The sound insulation layer of the easily disassembled and reinstallable sound-insulating self-adhesive floor sample of Example 2 was peeled off from the floor layer, and it was found that the sound insulation layer was damaged, indicating that the bonding strength between the first bonding layer and the sound insulation layer here is much greater than the breaking strength of the sound insulation layer. Example 3 The structure of the easily disassembled and reinstallable sound-insulating self-adhesive floor according to Example 3 of the present invention sequentially includes from top to bottom: Floor layer: Rigid polyvinyl chloride floor, with a thickness of about 2.5 mm, which is prepared according to the specific method described in Example 1 of CN 110524998A; First bonding layer: One-component reactive polyurethane hot-melt adhesive, purchased from Henkel Corporation, model number 9515, 30 g / m 2 ; Sound insulation layer: Radiation-crosslinked polyethylene NMP-75010ka-174.6, foaming ratio: 7.5, thickness: 1 mm, breaking strength: 5.9 N / cm, purchased from Hubei Xiangyuan New Materials Co., Ltd., where the pores of the sound insulation layer are not connected to each other and its upper and lower surfaces both have a continuous pore-free skin structure; Second bonding layer: Solvent-based polyacrylate pressure-sensitive adhesive F6A508, purchased from Ningbo Yongliu New Materials Technology Co., Ltd., 30 g / m 2 ; Release layer: 50-μm-thick biaxially oriented polyester (BOPET) release film (width 1300 mm), purchased from Hangzhou Shengcheng Film Technology Co., Ltd. The easily disassembled and reinstallable sound-insulating self-adhesive floor according to Example 3 of the present invention is prepared as follows: 1. Corona-treat both surfaces of the radiation-crosslinked polyethylene sound insulation layer with a corona machine at a speed of 25 m / min so that the surface tension of both surfaces of the sound insulation layer changes from about 36 dyn / cm to equal to or greater than 38 dyn / cm; 2. Heat a one-component reactive polyurethane hot melt adhesive (which is a solvent-free moisture-curing adhesive) to about 140 °C to melt it, and apply it to the back of the floor layer. During the open time of the adhesive, stick the sound insulation layer to the adhesive and compact it; wait for 24 hours for the moisture in the air to react with the adhesive and the adhesive to cure to form a first bonding layer. 3. Apply a liquid polyacrylate adhesive to a biaxially oriented polyester (BOPET) release film. 4. Stick the release film coated with polyacrylate adhesive to the sound insulation layer, where the polyacrylate adhesive is located between the release film and the sound insulation layer, on the side opposite to the first bonding layer of the sound insulation layer. The sound insulation layer of the easily disassembled and reinstallable sound-insulating self-adhesive floor sample in Example 3 was peeled off from the floor layer, and it was found that the sound insulation layer was damaged, indicating that the bonding strength between the first bonding layer and the sound insulation layer here is much greater than the breaking strength of the sound insulation layer. Control Example 1 Repeat Example 1, except that the second bonding layer is replaced with a high-adhesion styrene-isoprene-styrene block copolymer pressure-sensitive adhesive (purchased from Guangzhou Deyuan Fine Chemical Co., Ltd., model number 712), and its bonding force with the ground is 8.3 N / cm. In other words, the breaking strength of the sound insulation layer here (4.35 N / cm) is less than the bonding strength between the second bonding layer and the ground (8.3 N / cm). Control Example 2 Repeat Example 2, except that the surface of the sound insulation layer to be bonded to the first bonding layer is not corona-treated. The sound insulation layer of the easily disassembled and reinstallable sound-insulating self-adhesive floor sample in Control Example 2 was peeled off from the floor layer, and it was found that the sound insulation layer and the floor layer could be separated, and the bonding strength between the first bonding layer and the sound insulation layer was measured to be 0.3 N / cm, which is much less than the breaking strength of the sound insulation layer (5.4 N / cm). Here, the method for measuring the bonding strength between the first bonding layer and the sound insulation layer is as follows: Cut a sample with the floor layer and the sound insulation layer bonded well, 20 cm long and 5 cm wide, tear it for a length of 5 cm, then add both sides to the fixture of a tensile testing machine (model: Haida International B614), and finally measure the tensile force with the tensile testing machine at a speed of 2 mm / s. Testing Methods and Judgment Criteria Simulate the state of the floor used for 2 to 3 years under the high temperature state of 80°C for 24 hours. According to the peel strength test method of EN 1372-2015, measure the initial peel strength between the second adhesive layer of the floor and the ground and the peel strength after aging at 80°C for 24 hours at room temperature (i.e., 25°C) as the initial adhesion and the adhesion after aging respectively. Then, calculate the change rate of the peel strength using the initial adhesion and the adhesion after aging between the second adhesive layer and the ground. If the reduction of the adhesion after aging does not exceed 30% and there is no adhesive residue when the floor is replaced, it indicates that the system meets the requirements of the easily disassembled, reinstallable, and soundproof self-adhesive floor of the present invention. Experimental results In Examples 1, 2, and 3, after prying up the floor, there was no residue of the second adhesive layer on the ground. It is considered that this is caused by the fact that the bonding strength between the first adhesive layer and the soundproof layer is greater than the bonding strength between the second adhesive layer and the ground, and the breaking strength of the soundproof layer is greater than the bonding strength between the second adhesive layer and the ground. In addition, in Examples 1, 2, and 3, compared with the initial adhesion, the reduction of the adhesion after aging does not exceed 30%. It is considered that this is caused by the fact that the pores of the soundproof layer are not connected to each other and its upper and lower surfaces have a continuous and pore-free cortical structure. The above confirms that Examples 1, 2, and 3 all meet the requirements of the easily disassembled, reinstallable, and soundproof self-adhesive floor. In Comparative Example 1, the breaking strength of the soundproof layer is less than the bonding strength between the second adhesive layer and the ground, and the soundproof layer breaks and remains on the ground, unable to meet the requirements of the easily disassembled, reinstallable, and soundproof self-adhesive floor. In Comparative Example 2, the bonding strength between the first adhesive layer and the soundproof layer is very small, less than the bonding strength between the second adhesive layer and the ground. After prying up the floor, the entire soundproof layer separates from the first adhesive layer and remains on the ground, unable to meet the requirements of the easily disassembled, reinstallable, and soundproof self-adhesive floor. The above has illustrated the present invention through some implementation schemes and examples, but these implementation schemes and examples are not limitations on the present invention. Those skilled in the art should understand that the easily disassembled, reinstallable, and soundproof self-adhesive floor can be changed within the spirit of the present invention based on the disclosed content of the present invention.

Claims

1. An easily disassembled and reinstallable soundproof self-adhesive floor, comprising, from top to bottom, a floor layer, a first adhesive layer, a soundproof layer, a second adhesive layer and a release layer, wherein the bonding strength between the first adhesive layer and the soundproof layer is greater than the bonding strength between the second adhesive layer and the ground, the breaking strength of the soundproof layer is greater than the bonding strength between the second adhesive layer and the ground, the soundproof layer is made of a porous foam material that does not contain a plasticizer, especially does not contain polyvinyl chloride, the pores of the soundproof layer are not connected to each other, and the upper and lower surfaces of the soundproof layer have a continuous non-porous skin structure.

2. The easily disassembled and reinstallable soundproof self-adhesive floor according to claim 1, wherein the soundproof layer is made of a material selected from a porous foam material based on polyethylene, a porous foam material based on polypropylene and a combination thereof; preferably, the soundproof layer is made of radiation cross-linked polyethylene and / or radiation cross-linked polypropylene.

3. The easily disassembled and reinstallable soundproof self-adhesive floor according to claim 1 or 2, wherein the foaming ratio of the porous foam material is 5 to 30, and / or the thickness of the porous foam material is 0.5 to 2.0 mm; preferably, the soundproof layer is prepared from a porous foam material based on polyethylene with a foaming ratio of 5 to 12.5, more preferably 7.5 to 10, and / or a porous foam material based on polypropylene with a foaming ratio of 8 to 15, more preferably 10 to 15.

4. The easily disassembled and reinstallable silent self-adhesive floor according to any one of claims 1 to 3, wherein the floor layer comprises polyvinyl chloride, polypropylene, polyethylene, polyurethane, polyester and combinations thereof, and / or the floor layer has a single-layer, double-layer or more-layer structure.

5. The easily disassembled and reinstallable soundproof self-adhesive floor according to any one of claims 1 to 4, wherein the first adhesive layer is prepared from a reactive adhesive; preferably, the reactive adhesive is selected from a one-component reactive polyurethane hot melt adhesive, a two-component reactive acrylate or polyurethane adhesive, and a combination thereof.

6. The easily disassembled and reinstallable soundproof self-adhesive floor according to any one of claims 1 to 5, wherein the second adhesive layer is made of a pressure-sensitive adhesive; preferably, the second adhesive layer comprises an elastomeric pressure-sensitive adhesive or a resin-type pressure-sensitive adhesive.

7. The easily disassembled and reinstallable silent self-adhesive floor according to claim 6, wherein the pressure-sensitive adhesive in the second adhesive layer is a water-based, solvent-based or solvent-free pressure-sensitive adhesive.

8. The easily disassembled and reinstallable soundproof self-adhesive floor according to claim 6, wherein the elastomeric pressure-sensitive adhesive is selected from natural rubber pressure-sensitive adhesives, synthetic rubber pressure-sensitive adhesives, artificially synthesized thermoplastic elastomer pressure-sensitive adhesives and combinations thereof; preferably, the synthetic rubber pressure-sensitive adhesive comprises styrene-butadiene rubber, polyisobutylene rubber, butyl rubber, chloroprene rubber and / or combinations thereof, and / or the artificially synthesized thermoplastic elastomer pressure-sensitive adhesive comprises styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer and / or combinations thereof.

9. The easily disassembled and reinstallable silent self-adhesive floor according to claim 6, wherein the resin-type pressure-sensitive adhesive is selected from polyacrylate, polyurethane, polyvinyl ether, vinyl acetate copolymer, polyester, a pressure-sensitive adhesive composed of a mixture of silicone resin and silicone rubber, and combinations thereof.

10. The easily disassembled and reinstallable silent self-adhesive floor according to any one of claims 1 to 9, wherein the release layer is selected from polypropylene or polyester film coated with a release agent, release paper, and a combination thereof.

11. A method for preparing the easily disassembled and reinstallable silent self-adhesive floor according to any one of claims 1 to 10, the method comprising: include: preparing a sound-proof layer; Bonding the noise-removing layer and the floor layer via a first bonding layer; applying a second adhesive layer to a side of the quiet layer opposite the first adhesive layer; and attaching a release layer to the second adhesive layer; or The method comprises: preparing a sound-proof layer; Bonding the noise-removing layer and the floor layer via a first bonding layer; applying a second adhesive layer to the release layer; and A release layer with a second adhesive layer is adhered to a side of the soundproof layer opposite to the first adhesive layer, wherein the second adhesive layer is located between the release layer and the soundproof layer.

12. A method for using the easily disassembled and reinstallable silent self-adhesive floor according to any one of claims 1 to 10, the method comprising: include: removing the release layer from the easily disassembled and reinstallable silent self-adhesive floor, and The easily disassembled and reinstallable silent self-adhesive flooring from which the release layer has been removed is bonded to the ground through the second bonding layer, preferably to the cement ground.

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