Foaming method for preparing polyurethane foam
A technology of polyurethane foam and foaming slurry is applied in the foaming field of producing polyurethane foam, which can solve the problems of large resistance between the edge of foamed material and the box wall and increase waste due to the surface tension of the foaming slurry, so as to eliminate the resistance of the box wall, eliminate the The effect of improving the yield
Inactive Publication Date: 2012-03-28
LIYANG SHANHU IND CO LTD
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Problems solved by technology
[0002] No matter the foaming slurry obtained by manual foaming or mechanical foaming, the top of the foam product obtained after it is placed in the foaming box after free foaming is dome-shaped, which is mainly due to the surface tension of the foaming slurry itself and Due to the large resistance between the edge of the foam material and the wall of the box; the resulting product needs to cut the dome at the top of the foam product, because the existence of the upper dome increases the waste when cutting the edge skin of the foam
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Experimental program
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Embodiment Construction
[0010] The present invention will be further described below in combination with specific embodiments.
[0011] At present, when producing polyurethane foam products, after mixing the foaming slurry, it is directly poured into the foaming box and allowed to foam freely. During the foaming process, due to the surface tension of the foaming slurry itself and the gap between the edge of the foam material and the box wall The reason for the greater resistance is that the tops of the resulting products are all dome-shaped, and the foam products actually used need to cut the domes at the top, because the existence of the upper dome increases waste when cutting the edges of the foam.
[0012] The foaming method for producing polyurethane foam provided by the present invention is as follows: at first adding the pre-stirred foaming slurry into the foaming box; then placing pad paper along the inner wall of the foaming box, the pad paper is preferably kraft paper; After the foaming slur...
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The invention relates to a foaming method for preparing polyurethane foam. The foaming method comprises the following steps of: (1) adding premixed foaming slurry into a foaming box; (2) putting packing paper along the inner wall of the foaming box; and (3) after the packing paper is immersed by the foaming slurry, lifting the packing paper upwards along with the foaming of the foaming slurry till the foaming is finished. In the foaming process, the packing paper and the foaming slurry are lifted upwards and synchronously, so that the resistance of the box wall when the foaming slurry rises can be reduced and even eliminated, further the height of foam on the edge is level to the height of foam in the center, the foaming body with a smooth surface is obtained and the yield of a foaming product is improved.
Description
technical field [0001] The invention relates to a foaming method for preparing polyurethane foam. Background technique [0002] No matter the foaming slurry obtained by manual foaming or mechanical foaming, the top of the foam product obtained after it is placed in the foaming box after free foaming is dome-shaped, which is mainly due to the surface tension of the foaming slurry itself and The resistance between the edge of the foam material and the wall of the box is large; the resulting product needs to cut the dome at the top of the foam product. Due to the existence of the upper dome, the waste is increased when the foam is cut. Contents of the invention [0003] The invention overcomes the deficiencies in the prior art and provides a foaming method for preparing polyurethane foam. The foamed products prepared by the foaming method can reduce waste and improve the yield of foamed products. [0004] The foaming method of preparing polyurethane foam provided by the inve...
Claims
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IPC IPC(8): C08J9/00
Inventor 李田生
Owner LIYANG SHANHU IND CO LTD