Flexible polyurethane foam and production process

Abstract

The invention discloses flexible polyurethane foam and a production process for preparing the flexible polyurethane foam. A mixture of polyether, isocyanate, water, a catalyst and foam stabilizer is formed by reacting by means of one-step continuous foaming process, wherein the polyether consists of PPG (polypropylene glycol) and POP (polyether polyol), and the proportion of 2,4-TDI (toluene diisocyanate) to 2,6-TDI, which are isomers of TDI of isocyanate, ranges from 75-85:15-25. High-density foam with apparent density up to 80kg/m3 is produced by means of the one-step continuous foaming process and has the advantages of high production capacity and fine cell-opening performance as compared with molding foam. The foam produced by the process has high density up to 80kg/m3 under the condition of continuous production as compared with common block foam, so that the cell diameter of the foam is thick, and the foam is high in elasticity and bearing capacity.

Description

technical field [0001] The present invention relates to a kind of apparent density reaches 80kg / m 3 The technological formula and production process realization process of flexible polyurethane foam plastics. Background technique [0002] In 2015, the global polyurethane foam market demand reached 960 million tons. The Asia-Pacific region has huge growth potential in the polyurethane foam market. The automobile and furniture industries have become new areas of polyurethane foam market demand. As a branch of soft polyurethane foam, sponge is widely used in various fields such as industrial production, national defense technology, medical and health care, and daily life. It has excellent properties such as low density, good elastic recovery, sound absorption, ventilation, and heat preservation. Polyurethane flexible foam products account for 80% of the total consumption of the polyurethane industry, and with the development of the industry, this proportion is still rising. ...

AI Technical Summary

Problems solved by technology

[0005] Density is an important characterization parameter of sponge, which affects the load-bearing performance and service life of sponge. Even if high load-bearing capacity is achieved, the structural skeleton composition of low-density products must be less than that of high-density products. After a certain period of use, it will A series of problems such as deformation will occur, and the service life cannot meet the requirements

In the current block foam production process, the apparent density of the generally produced sponge is 60kg / m 3 Below, the apparent density reaches 80kg / m 3 The sponge has not been done by the manufacturer

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