Multi-layer on-line fitting type stone-plastic plate

Abstract

The invention discloses a multi-layer on-line fitting type stone-plastic plate which sequentially comprises an upper stone-plastic layer, a middle stone-plastic layer and a lower stone-plastic layer from top to bottom. The thickness ratio of the upper stone plastic layer: middle stone plastic layer: lower stone plastic layer = 1: 3-4.5: 0.9-1.3, the ratio of PVC to stone powder in the upper stoneplastic layer is 1: 2.7-1: 3.5, the ratio of PVC to stone powder in the middle stone plastic layer is 1: 4.5-1: 6.4, the ratio of PVC to stone powder in the lower stone plastic layer is 1: 2.7-1: 3.8,and a glass fiber cloth or non-woven fabric reinforcing layer is arranged between the upper stone plastic layer and the middle stone plastic layer. In the invention, the stone plastic layer is divided into two layers with different stone powder contents, the glass fiber cloth or non-woven fabric is bonded between the two layers, the middle stone plastic layer has large thickness and high stone powder content, so that the cost of the plate can be reduced, the stability of the plate can be enhanced, and the shrinkage rate can be reduced; and the lower stone plastic layer has high PVC content and strong elasticity, can resist the shrinkage force of the wear-resistant layer and the paint layer, keeps the plate balanced, and prevents the plate from warping.

Description

Technical field [0001] The invention relates to a multi-layer online bonding type stone plastic board. Background technique [0002] As a new type of board, stone plastic board has the following advantages: the raw material is environmentally friendly, and the formaldehyde emission is zero; the material is light and thin, and has super wear resistance, high elasticity and super impact resistance; and has excellent anti-skid, flame retardant, Waterproof and noise-proof performance, construction and installation are also very convenient. Therefore, the stone-plastic board can be used as floor, wallboard, furniture panel, wall line, etc., and its application range is getting wider and wider. Moreover, the stone plastic board can be recycled and reused, which has great advantages in cost reduction and environmental protection. [0003] There is a serious problem with the stone plastic slab, that is, when it undergoes relatively large changes in cold and heat, its magnification and sh...

AI Technical Summary

Problems solved by technology

However, the co-extrusion method will cause the following problems: 1. The extruded resin seems to be layered, but it is extruded from a mold and formed at one time. In fact, it is still a resin sheet, but the materials of the upper, middle and lower layers of the resin may have Different, in this case, the internal stress of the resin sheet is relatively large, especially when the materials of the upper, middle and lower layers are different, it will lead to an increase in the internal stress of the resin sheet, which will affect the mechanical properties and flatness of the resin sheet 2. Co-extrusion will waste the production capacity of the extruder. If the resin is divided into upper and lower layers in the method of CN107031136A, two extruders are required to carry out co-extrusion, but its comprehensive production capacity is only 120-125% of one extruder about

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