Weft-knitted spacer fabric, preparation method thereof and polyurethane foam composite material containing fabric

Abstract

The invention discloses weft-knitted spacer fabric, a preparation method thereof, a polyurethane foam composite material containing the fabric, a preparation method of the composite material and an application of the composite material in shoe materials. The weft-knitted spacer fabric comprises an upper surface layer, middle spacer yarn and a lower surface layer, and the upper surface layer and the lower surface layer are connected into a whole to form a three-dimensional structure through tucks of the spacer yarn on the upper surface layer and the lower surface layer. The connection distanceand quantity of tucks are changed by different needle selection tucking modes, and the thickness of the spacer fabric and the arrangement density of the spacer yarn are changed under the action of elastic yarn on the upper and lower surface layers. According to the sole material, falling of the spacer yarn of the weft-knitted spacer fabric under repeated compression can be eliminated, strength ofpolyurethane foam can be improved, the thickness of the spacer fabric and the arrangement density of the spacer yarn can be changed according to the change of the thickness of soles and bearing conditions of different parts, and accordingly, the soles with polyurethane foam as the base material are integrally reinforced.

Description

technical field [0001] The invention relates to a weft-knitted spacer fabric and a preparation method thereof, a polyurethane (polyurethane, PU for short) foam composite material comprising the fabric, a preparation method of the composite material and its application in shoe materials. Background technique [0002] The sole is an important part of all types of shoes to withstand compressive loads. Especially for sports and fitness shoes, the sole should have good compression elasticity, shock absorption, durability and lightness, so as to provide comfortable support for the wearer and relieve the fatigue of the foot when walking. Knitted (including weft-knitted and warp-knitted) spacer fabrics (also known as three-dimensional fabrics, three-dimensional fabrics) are a three-dimensional structure formed by connecting the upper and lower surface layers through spacer wires. This three-dimensional structure characteristic determines The knitted spacer fabric has good propertie...

AI Technical Summary

Problems solved by technology

The weak point of this invention is: when the machine number of computerized flat knitting machine determines the gauge of its front and rear needle beds, the range of changing the coil length of the spacer wires between the front and rear needle beds (that is, adjusting the thickness of the spacer fabric) is very limited.

The disadvantages of the above insoles comprising knitted spacer fabrics are that the support element is an additional insert, which is not integral with the knitted spacer fabric, and is prone to breakage of the two parts; moreover, apart from the support elements, the rest of the sole is only made Knitted spacer fabrics bear compressive loads and have poor load-bearing properties

[0012] As can be seen from the above, there are still defects in the spacer fabrics of the above-mentioned prior art

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