Fibre enhancement modifying method for polyurethane foam plastic
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A foam and fiber-reinforced technology, applied in the field of fiber-reinforced modification of polyurethane foam, to achieve good performance, uniform interface, and light weight
Active Publication Date: 2008-06-04
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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It can be seen that the effect of chopped glass fiber reinforced polyurethane foam is obvi...
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specific Embodiment approach 2
[0033] Polyether polyol 1 85, polyether polyol 2 15, catalyst 0.01, hard foam silicone oil 1, foaming agent 0.30, flame retardant 10, anti-aging agent 0.1, isocyanate 130, reinforcing material 240, using compression molding or pultrusion method, the specific method is:
[0034] 1. Compression molding is to mix the components in the formula evenly, then spray on the surface of the reinforcing fiber at a relatively fast speed, impregnate evenly, and put it into the mold for curing at room temperature;
[0035] 2. Pultrusion molding is carried out by using pultrusion equipment. After mixing the components in the formula evenly, spray it on the surface of the reinforced fiber running at a certain speed at a relatively fast speed, and enter the mold cavity after uniform impregnation for foaming, curing, forming.
specific Embodiment approach 3
[0036] Polyether polyol 1 90, polyether polyol 2 10, catalyst 0.01, hard foam silicone oil 1.5, foaming agent 0.25, flame retardant 15, antioxidant 0.1, isocyanate 150, reinforcing material 265, using compression molding or pultrusion method, the specific method is:
[0037] 1. Compression molding is to mix the components in the formula evenly, then spray on the surface of the reinforcing fiber at a relatively fast speed, impregnate evenly, and put it into the mold for curing at room temperature;
[0038] 2. Pultrusion molding is carried out by using pultrusion equipment. After mixing the components in the formula evenly, spray it on the surface of the reinforced fiber running at a certain speed at a relatively fast speed, and enter the mold cavity after uniform impregnation for foaming, curing, forming.
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Abstract
The invention relates to a fiber reinforced and modified method of a polyurethane foam plastic. The formula of raw materials added into raw materials of the polyurethane foam plastic is: 80-90 portions of polyether polyol 1; 10-20 portions of polyether polyol 2; 0.01-0.03 portions of catalyst; 0.5-2 portions of hard foam silicon oil; 0.2-0.5 portions of foaming agent; 5-20 portions of flame retardant; 0.1-0.2 portions of antioxidant; 115-150 portions of isocyanate; 230-300 portions of reinforcing materials. compression molding forming is that: each component in the formula after mixed evenly is fast sprayed on the surface of reinforcing fiber, which is dipped uniformly and then put into the die for curing molding under room temperature; pulling and extruding molding is carried out through a pulling and extruding device; each component in the formula after mixed evenly is fast sprayed on the surface of the reinforcing fiber running with certain speed, which is dipped uniformly and then put into a die cavity for foaming, curing and molding.
Description
Technical field: [0001] The invention belongs to the technical field of polymer materials, and relates to a fiber-reinforced modification method of polyurethane foam plastics. Background technique: [0002] Polyurethane foam is a widely used engineering material. It has low relative density, high specific modulus, high specific strength, and good heat insulation, sound insulation, and chemical corrosion resistance. It is generally valued by the engineering community. As an ideal lightweight structural material, it is widely used in aeronautical structural parts, marine structural parts and sports equipment; as a good energy absorbing material, it is often used as various anti-collision cushioning packaging or lining Pad materials, etc., but due to the low strength of polyurethane foam, it cannot meet the use requirements under many special working conditions, so many researchers have carried out research on the reinforcement and modification of polyurethane foam. From the de...
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