Treatment method of filler calcium carbonate in polyurethane leather

A technology of polyurethane leather and processing method, applied in the direction of fibrous filler, dyed low molecular organic compound treatment, etc., can solve the problem of the deterioration of the appearance and mechanical properties of polyurethane leather, the reduction of bending resistance and tensile resistance, and the deterioration of appearance properties. and other problems, to achieve the effect of improving dispersion performance, increasing filling amount, and low energy consumption

Inactive Publication Date: 2016-03-09
江苏宁翔新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of calcium carbonate's own performance, when its filling amount exceeds 20%, the appearance and mechanical properties of polyurethane leather products are significantly reduced, especially the bending resistance and tensile resistance are significantly reduced, and the appearance performance is also reduced. Tend to worsen
At present, there are no other reports except Jin Yeling's heavy calcium carbonate used in polyurethane leather.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1: Weigh 1KG stearic acid and dissolve it in 30KG of DMF solvent, then add 100KG calcium carbonate, fully mix and infiltrate; put the infiltrated calcium carbonate into a pair of roller extruders, and extrude the rollers at a distance of 1 mm. Press twice to get calcium carbonate as filler in polyurethane leather.

Embodiment 2

[0008] Embodiment 2: Take 2KG stearic acid and dissolve in 45KG of DMF solvent, then add 100KG calcium carbonate, fully mix and infiltrate; put the calcium carbonate after infiltration in the double-roll extruder, and the distance between the two rollers is 1.5mm Squeeze 6 times to get calcium carbonate as filler in polyurethane leather.

Embodiment 3

[0009] Embodiment 3: take by weighing 3KG stearic acid and be dissolved in the DMF solvent of 60KG, add 100KG calcium carbonate again, fully mix and infiltrate; Insert the calcium carbonate after infiltration in the double-roll extruder, and the distance between the rollers is 2mm to extrude Press 10 times to get calcium carbonate as filler in polyurethane leather.

[0010] The calcium carbonate of Examples 1-3, under the premise of not changing the tanning process, is added in the production of polyurethane leather with an addition amount of 40%, and the performance of the tanned leather still meets the industry standard.

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PUM

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Abstract

The invention discloses a processing method for calcium carbonate as filler in polyurethane leather. The processing method for calcium carbonate comprises the steps as follows: stearic acid is dissolved in a DMF (dimethyl formamide) solvent, and then calcium carbonate is added in the solvent for sufficient mixing and infiltrating; infiltrated calcium carbonate is put in a double-roller extruder to be extruded for 2-10 times, and calcium carbonate as the filler in polyurethane leather is obtained; and a mass ratio of calcium carbonate, stearic acid to DMF is 1: (0.01-0.03): (0.3-0.6), and the double-roller extrusion condition is that the roller distance is not larger than 2 mm. The addition amount of obtained calcium carbonate in the polyurethane leather can be increased under the premise that the leather performance is guaranteed, the polyurethane leather cost is reduced, and the large market demand is met.

Description

technical field [0001] The invention belongs to the field of application of inorganic non-metallic materials in polymer materials, and in particular relates to a treatment method for filler calcium carbonate in polyurethane leather. Background technique [0002] Pure resin polyurethane leather has disadvantages such as poor heat resistance and poor appearance. Adding inorganic fillers can not only improve the stiffness and gloss of polyurethane leather, but also effectively reduce production costs. Based on superior cost performance, calcium carbonate is generally used as a filler in middle and low-end polyurethane leather at present, accounting for more than 80% of the synthetic leather market. However, due to the limitation of calcium carbonate's own performance, when its filling amount exceeds 20%, the appearance and mechanical properties of polyurethane leather products are significantly reduced, especially the bending resistance and tensile resistance are significantly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/02C09C3/08C08K9/04C08K3/26C08L75/04
Inventor 金叶玲陈静陈权程晓春丁师杰钱运华蒋金龙倪伶俐
Owner 江苏宁翔新材料有限公司
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