Raw materials and process for manufacturing rubber floor tile

Abstract

The invention discloses a process for manufacturing a rubber floor tile. Raw materials include polyoxypropylene polyether glycol, toluene diisocyanate and waste rubber particles. A prepolymer method is adopted in an isocyanate production process. The physical and mechanical performances of a material prepared by using a one-step method are poorer than those of the prepolymer method, and particularly the tensile strength difference is relatively high. The reasons are as follows: polyether glycol is only simply mixed with TDI in the one-step method, a prepolymerization process is omitted, and part of free TDI does not react with polyether glycol, but directly reacts with water or active hydrogen on the surfaces of rubber particles, so that polyether glycol is relatively surplus to play a role of a plasticizer, macromolecules cannot be formed, and the adhesiveness is poor. By using the prepolymer method, polyether glycol reacts with TDI to generate a prepolymer containing a -NCO group and reacts with water and active groups on the surfaces of the rubber particles to form macromolecules, so that the adhesiveness is good, and the tensile strength is remarkably enhanced.

Description

technical field [0001] The invention relates to the field of rubber product manufacturing, more specifically a raw material for manufacturing rubber floor tiles and a process thereof. Background technique [0002] At present, my country has become the world's largest producer of rubber products. With the continuous increase in the output of rubber products such as tires, hoses, and tapes, a large number of rubber products are scrapped every year. Waste rubber has become another major public hazard after "white pollution". It is called "black pollution". Waste rubber is both harmful and valuable. It can neither be destroyed nor stacked for a long time. Destruction or stacking will seriously affect the ecological environment. Waste rubber has many excellent properties, such as good elasticity, good weather resistance, large friction coefficient, and not easy to age. In the past, most of the waste rubber was treated by recycling, but because of the limited performance and dosa...

AI Technical Summary

Problems solved by technology

In the past, most of the waste rubber was treated by regeneration, but due to the limited performance and amount of recycled rubber, low added value, and suspicion of secondary pollution, its development has shown a downward trend.