High-strength hard polyurethane foamed plastic and preparation method thereof

Abstract

The invention relates to a high-strength hard polyurethane foamed plastic and a preparation method thereof. The preparation method is characterized in that steel profiles and aluminum alloy profiles are welded to form a frame (1), steel materials and aluminum alloy materials are made into an embedded part (2), one end of the embedded part (2) is welded to the frame (1), then the embedded part (2) and the frame (1) are placed into a mould, and finally raw materials of hard polyurethane foamed plastic are added into the mould to carry out one-time foam moulding so as to obtain a high-strength hard polyurethane foamed plastic. The density of the foamed material is 300 to 700 kg / m<3>. The inner is a metal frame supporting structure (fig.1 and fig.2). The part that stretches out the foams is the embedded part (2). The high-strength hard polyurethane foamed plastic has an excellent performance on resisting breaking, pulling, and pressing. Furthermore, through the embedded part that stretches out the foams, the plastic can be welded to, bonded to, or locked to other members and facilities. The high-strength hard polyurethane foamed plastic can be used to manufacture products such as aquaculture cages, small ships, float bridges, floating dock, work platform on water, houses on the water, floating islands, portable houses, and the like. The problem that conventional hard polyurethane foam plastic has insufficient structural strength and cannot be used to produce the products mentioned above is solved.

Description

technical field [0001] The invention belongs to the field of polyurethane, in particular to the field of manufacture and application of rigid polyurethane foam. Background technique [0002] Rigid polyurethane foam is a kind of foam made by mixing isocyanate and polyether polyol or polyester polyol as the main raw materials under the action of various additives such as foaming agent, catalyst, stabilizer, and flame retardant. Foam material is a new type of synthetic material with heat insulation, heat preservation, waterproof and shockproof functions. Polyurethane foam is also used to make imitation wood products and some accessories. [0003] The existing rigid polyurethane foam has the problems of low structural strength, poor flexural, tensile, and compressive physical properties, and the product cannot be firmly connected with other components and equipment. Some inventions "A Reinforced Polyurethane Rigid Foam Material and Its Manufacturing Method" Patent No. 20091026...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of rigid polyurethane foam material that is stronger in bending resistance, tensile resistance and compression resistance than the existing rigid polyurethane foam plastic material, and can be connected with other components and equipment by welding, bolting and locking. High-strength rigid polyurethane foam and its preparation method are used to manufacture products such as water breeding net cages, small ships, pontoons, floating docks, water operation platforms, water houses, water floating islands, and movable board houses, and solve the existing rigid The problem that polyurethane foam cannot be used to manufacture the above products due to insufficient structural strength and low strength of existing connection methods

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