Polyurethane combined material for furniture sponge and preparation method thereof

Abstract

The invention belongs to the field of polyurethane, and concretely relates to a polyurethane combined material for furniture sponge and a preparation method thereof. The combined material is prepared by mixing a composition A and a composition B, the composition A is prepared from polyether polyol, polymer polyol, a cross-linking agent, a foaming agent, a foam stabilizer , a pore-opening agent and a catalyst, and the composition B is prepared from polyether polyol, an isocyanate and a pore-opening agent. When the combined material is used, the composition A and the composition B are mixed according to the weight ratio of 100:75-110 and injected into a die, so that high-bearing low-density furniture sponge is prepared. The combined material employs low-volatilization low-atomization raw materials, and possesses advantages of low smell, good fluidity, wide applicable temperature scope and the like. The furniture sponge prepared from the combined material possesses the advantages of being basically odorless, safe, nontoxic, free of defects on the surface, good in elasticity, excellent in handfeel, low in density, good in bearing property and the like. The invention also provides a preparation method for the combined material, and the technology is reasonable.

Description

technical field [0001] The invention belongs to the field of polyurethane, and in particular relates to a polyurethane composite material for furniture sponges and a preparation method thereof. Background technique [0002] Since the reform and opening up, the furniture industry has developed rapidly, and the types of materials have also continued to increase. Among them, furniture with polyurethane foam as seat cushions and backrests has won people's love for its excellent feel and good resilience. For a long time, polyurethane foam for furniture has been made by hot foam cutting with TDI as the isocyanate component. Although the foam has excellent hand feeling and good resilience, it cannot meet the requirements in terms of load-carrying capacity, and it is necessary to design a metal foam under the sponge. Springs provide load bearing. Although polyurethane molded foam can provide excellent bearing capacity, its high density greatly increases the cost of molded foam, esp...

AI Technical Summary

Problems solved by technology

For a long time, polyurethane foam for furniture has been made by hot foam cutting with TDI as the isocyanate component. Although the foam has excellent hand feeling and good resilience, it cannot meet the requirements in terms of load-carrying capacity, and it is necessary to design a metal foam under the sponge. spring to provide load bearing

Although polyurethane molded foam can provide excellent bearing capacity, its high density greatly increases the cost of molded foam, especially the molded foam with environmentally friendly MDI as the isocyanate component, the density is generally 50kg / m 3 above

Moreover, with the gradual enhancement of people's safety awareness and environmental protection awareness, higher and higher requirements are put forward for the odor and low toxicity of polyurethane foam for furniture. The traditional high volatility, high odor, and HCFC-141B-containing physical blowing agent The A material and the TDI type B material with a higher vapor pressure (1.33Pa, 20°C) can no longer meet the requirements of contemporary people.

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