Rigid board plastic flooring and its production method

Abstract

The invention relates to a rigid board plastic flooring comprising a wear layer, a decoration layer, a first connecting layer and a bottom layer which are connected in sequence, and also relates to the production method thereof. The bottom layer of the flooring is prepared using extrusion molding without adding plasticizer. The product is therefore more environmentally friendly. The edge of the click product is not easily damaged during storage and transportation as the bottom layer comprises a plastic hard board and the strength of the click profile is strong.

We claim: 
     
         1 . A rigid board plastic flooring comprising a wear layer, a decoration layer, a first connecting layer and a bottom layer which are connected in sequence and attached to each other by means of a hot press, wherein the bottom layer includes the extruded rigid board. 
     
     
         2 . The rigid board plastic flooring according to  claim 1 , wherein the rigid board plastic flooring further comprises a second connecting layer and a sound and shock-absorbing layer, the aforementioned second connecting layer and sound and shock-absorbing layer are arranged under the bottom layer in sequence. 
     
     
         3 . The rigid board plastic flooring according to  claim 2 , wherein the aforementioned first connecting layer and second connecting layer are 0.01-0.5 mm thickness, and 5-300 g/m 2  of gram weight. 
     
     
         4 . The rigid board plastic flooring according to  claim 2 , wherein the aforementioned first connecting layer and second connecting layer are prepared from the same material; that is membrane or cloth which is not adhesive at room temperature and can stick the upper layer and the lower layer together when heated to 50-200° C. 
     
     
         5 . The rigid board plastic flooring according to  claim 2 , wherein the aforementioned first connecting layer and second connecting layer are prepared from different materials. More specifically, said the first connecting layer is prepared from membrane or cloth which is not sticky at room temperature and can stick the upper layer and lower layer at the same time when heated to 50-200° C. The aforementioned second connecting layer is prepared from double-component adhesive. 
     
     
         6 . The rigid board plastic flooring according to  claim 2 , wherein the aforementioned bottom layer could be a plastic rigid board, such as PP, PE, PVC, PET, ABS, PC, POM, PMMA, PS, PEEK, PTFE, PVDF, etc.; the aforementioned sound and shock-absorbing layer is prepared from cork or foamed material of 0.1-5.0 mm thickness; and this foamed material refers to a low-density foamed material. 
     
     
         7 . The rigid board plastic flooring according to  claim 2 , wherein the aforementioned wear layer could be prepared from a transparent polymer material, such as PP, PE, PVC, PET, ABS, PC, POM, PMMA, PS, PEEK, PTFE, PVDF, etc. 
     
     
         8 . The rigid board plastic flooring according to  claim 2 , wherein the aforementioned decoration layer could be prepared from polymer materials such as PP, PE, PVC, PET, ABS, PC, POM, PMMA, PS, PEEK, PTFE, PVDF, etc. 
     
     
         9 . A method of producing rigid board plastic flooring, wherein the bottom layer is molded through the extruding process; a wear layer, a decoration layer, a first connecting layer and a bottom layer are subjected to hot press under a certain temperature and pressure;
 a. Hot press: Overlap the back embossment board, the bottom layer, the first connecting layer, the decoration layer, the wear layer and the embossment board in sequence and implement hot press under a certain temperature and pressure;   b. UV coating and annealing: Apply UV treatment to the surface of the semi-finished product after step a, wherein the abrasion resistance is increased, and the product gains a glossy look. Annealing is then applied to the product and cool it when the product is heated to certain temperature. The product therefore has an appealing physical property.   c. Cutting: Cut to create products of the required sizes according to the needs of the customer.   d. Trimming/beveling/profiling the click product: Make the appearance of the product a resemblance of wood/stone flooring by trimming/beveling/profiling the click product according to the needs of the customer.   
     
     
         10 . The method of producing rigid board plastic flooring according to  claim 9 , wherein the aforementioned sound and shock absorbing layer is connected with the bottom surface of the aforementioned bottom layer by using the second connecting layer after UV coating and annealing. 
     
     
         11 . The method of producing rigid board plastic flooring according to  claim 9 , wherein the aforementioned bottom layer comprises PVC powder, a processing agent, internal lubricant, external lubricant, rare-earth stabilizer and calcium carbonate. 
     
     
         12 . The method of producing rigid board plastic flooring according to  claim 11 , wherein the aforementioned PVC powder, processing agent, internal lubricant, external lubricant, rare-earth stabilizer and calcium carbonate are 9.5-61.75%, 0-5.5%, 0.4-0.5%, 0.1-0.6%, 2.0-2.5% and 33.25-85.50% of the bottom layer respectively.