A kind of preparation method of the colored natural latex tube of two-color cross-section

Abstract

The invention discloses a preparation method for a colored natural latex tube with a bi-color cross section, and belongs to the technical field of natural latex tubes. According to the preparation method for the colored natural latex tube with the bi-color cross section, the large-specification and thick-wall colored natural latex tube with the bi-color cross section and having an inner diameter of not less than 6mm, an outer diameter of not less than 12mm and a tube wall thickness of not less than 5.5mm is prepared through the steps of preparing a mixed dispersoid, vulcanized latex, an inner-layer heat-sensitive latex and an outer-layer heat-sensitive latex, impregnating the inner-layer heat-sensitive latex and the outer-layer heat-sensitive latex, and carrying out die release, surface treatment and final drying. The obtained product is high in quality qualification rate, and stable in quality level, and the problems that a large-specification single-color colored natural latex tube prepared through an existing thermosensitive pressure extrusion method is low in extrusion efficiency and quality qualification rate, and a thick-wall colored natural latex tube which has a tube wall thickness of not less than 5.5mm is difficulty prepared, are solved; and meanwhile, the consumption amount for a pigment dispersion solution with a high price is reduced by controlling the thickness ofan outer-layer colored latex film of the latex tube to be 0.48mm-0.50mm, so that the preparation cost is saved.

Description

technical field

[0001] The invention relates to the technical field of natural latex tubes, in particular to a method for preparing a colored natural latex tube with two colors in cross section. Background technique

[0002] Natural latex tubes are often used in medical aids, experimental equipment connections, and fitness equipment assembly. The traditional heat-sensitive extrusion method to prepare natural latex tubes has been used since 1930. However, when preparing monochrome large-scale color natural latex tubes with an inner diameter of ≥6mm and an outer diameter of ≥12mm, due to the influence of the pigment dispersion on the heat-sensitive extrusion process Larger, the single-color natural latex tube of the same specification has a lower quality pass rate of more than 10% than the natural color natural latex tube, and with the increase of the inner and outer diameters, the production efficiency of the thermal extrusion method tends to decrease, and the appearance qual...

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