Polyurethane injection molding process for rubber film

Abstract

The invention relates to a process for forming a rubber base film by pouring polyurethane. The raw materials required for the process include RS-801 water-based washing agent, RS-601 rubber bottom treatment agent, RS-305PU perfusion glue and polyurethane stock solution. First, the RS-801 water-based After mixing the washing agent and water at a ratio of 1:13, heat it to 55-65°C; then take out the rubber film and put it in clean water; take out the rubber film and dry it; brush evenly on the dried rubber film Apply RS-601 rubber bottom treatment agent and then dry, then brush RS-305PU perfusion glue again, and dry; finally, after 3 hours, put the brushed bottom film into the oven, heat to 40-50 degrees, and then inject Polyurethane stock solution, the process described so that the rubber sole does not need to be thickened, and after the adhesive is applied, it can be placed for a long time. Bonding with this process makes the rubber and PU glue bonded without opening, and has the characteristics of strong aging resistance.

Description

technical field [0001] The invention belongs to the technical field of shoemaking, and in particular relates to a molding process of pouring polyurethane into a rubber backsheet. Background technique [0002] In the current shoe manufacturing market, when making shoe soles, the more durable and sturdy solution is to use rubber materials. However, the soles made of pure rubber bottoms are relatively hard and are not suitable for long distances. Therefore, when making shoe soles, if durable anti-slip is required The solution without losing flexibility is to pour polyurethane (referred to as polyurethane, or PU) on the rubber backsheet. However, when the rubber backsheet is poured into the polyurethane outsole to form, because rubber and polyurethane are not of the same type, there is no adhesive It is difficult to bond, so the common method is to add a layer of felt cloth on the rubber bottom, and then pour polyurethane glue, so that although the surface is bonded together, th...

AI Technical Summary

Problems solved by technology

[0002] In the current shoe manufacturing market, when making shoe soles, the more durable and sturdy solution is to use rubber materials. However, the soles made of pure rubber bottoms are relatively hard and are not suitable for long distances. Therefore, when making shoe soles, if durable anti-slip is required The solution without losing flexibility is to pour polyurethane (referred to as polyurethane, or PU) on the rubber backsheet. However, when the rubber backsheet is poured into the polyurethane outsole to form, because rubber and polyurethane are not of the same type, there is no adhesive It is difficult to bond, so the common method is to add a layer of felt cloth on the rubber bottom, and then pour polyurethane glue, so that although the surface is bonded together, the peeling strength is far from enough

And because the bottom of most rubber sheets is uneven, it is difficult to rough it, and it cannot be bonded without thickening. This situation has become a bottleneck in the shoemaking industry and restricts the development of the shoemaking industry.