Manufacturing method of polyvinyl alcohol embossed sponge

Abstract

The invention relates to a manufacturing method of polyvinyl alcohol concave-convex sponge. The polyvinyl alcohol concave-convex sponge comprises a polyvinyl alcohol concave-convex sponge body, a PVC soft glue film, a bottom glue layer, a composite glue layer and abrasive materials. Dot patterns are bestrewed on the front face of the polyvinyl alcohol concave-convex sponge body. The dot patterns are composed of a plurality of semispherical salient points arranged uniformly. Gaps between the adjacent salient points are mutually connected to constitute a communicating groove. The PVC soft glue film is formed on the back face of the polyvinyl alcohol concave-convex sponge body. The front face of the polyvinyl alcohol concave-convex sponge body is coated with the bottom glue layer. The upper surface of the bottom glue layer is coated with the composite glue layer. The lower ends of the abrasive materials are embedded into the bottom glue layer, and the upper ends of the abrasive materials protrude out of the upper surface of the composite glue layer. The concave portions of the position, corresponding to the communicating groove, of the surface of an abrasive belt communicate with one another to constitute a chip removal groove. The manufacturing method of the polyvinyl alcohol concave-convex sponge not only achieves the properties of blockage preventing and elastic grinding but also has the advantages that the process is simple, equipment investment is low, cost is low, abrasion resistance is achieved, service life is long, and toxicity is avoided.

Description

technical field [0001] The invention relates to the technical field of polyvinyl alcohol sponges, in particular to a method for manufacturing polyvinyl alcohol sponges used as abrasive belt substrates. Background technique [0002] Abrasive belt is a kind of belt-shaped tool that can be ground and polished by using adhesive to bond abrasives to flexible substrates such as paper and cloth. Its basic components are: substrate, abrasive and bonding agent. [0003] Abrasive belt is a flexible abrasive tool. Abrasive belt grinding is a compound processing technology with multiple functions of grinding, grinding and polishing. It is more flexible and safer than solid abrasive grinding wheel during polishing, with higher precision and lower grinding cost. . [0004] However, when the abrasive belt grinds some soft surfaces, such as soft materials such as wood and paint, it is easy to have poor chip removal, that is, the debris generated by grinding is blocked on the surface of th...

AI Technical Summary

Problems solved by technology

Although the abrasive belt of this structure has advantages in chip removal and anti-blocking, due to the relatively small amount of abrasive on the surface of the abrasive belt, the grinding ability is reduced, and because it is coated with primer and compound glue in different areas, it is necessary to use The printing machine with high precision performs primer coating and regluing operations, and after the glue layer is cured, it needs to be washed with water or air to remove the floating sand in the chip removal groove

Therefore, this type of abrasive belt with flutes has high requirements both in terms of equipment cost and process complexity, so that the cost of the abrasive belt increases accordingly

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