What are the common specifications of high-strength polypropylene double-twist yarns? 840D, 1260D, 1680D. How to choose?

Specification basic explanation

high-strength polypropylene double-twist yarns are mainly distinguished by denier. The specifications available in the market are diverse, and 840D, 1260D, 1680D are the ones most commonly used in industrial weaving. Denier represents the linear density of the yarn, and different deniers correspond to differences in the thickness of the yarn strand and the form of the single filament assembly. Within the same product series, the larger the denier, the thicker the yarn strand, and the overall strength of the assembly will also change accordingly. Besides denier, twist direction, twist degree, coloring method, whether functional modification is carried out, are also dimensions that cannot be ignored in specification selection, which will directly affect the weaving feel and the performance of the finished product.

Key points for selecting three mainstream specifications

840D yarn strands are relatively slender, and weaving is smooth and the formation is fine, suitable for fabrics with higher density and thinner and lighter finished products. It is mostly used for fine specification webbing, lightweight rope lines, decorative base fabrics, etc. The finished product has good flexibility and bending performance, and is suitable for scenarios where softness of the finished product is required.

1260D belongs to an intermediate specification, with strong comprehensive balance, taking into account both strength and weaving compatibility. It has the widest application range. Most conventional safety webbing, binding ropes, industrial base fabrics, etc. prefer to use this type. It can meet the basic load requirements and is less likely to have broken yarns or tangled yarn problems when woven on the machine, and is suitable for most conventional looms.

1680D has a thicker yarn body and more prominent overall strength performance. It is suitable for heavy-duty, high-load working conditions, mostly used for heavy-duty cables, thick load-bearing webbing, engineering protective fabrics, etc. However, when weaving thick yarns, higher equipment tension and guide wire components are required, and the finished product is thicker and less soft than low-denier specifications.

Comprehensive reminder for selecting high-strength polypropylene double-twist yarns

Selection cannot only be based on denier, but also needs to be comprehensively judged based on the usage environment, weaving equipment, and finished product requirements. In outdoor humid environments, attention should be paid to aging resistance modification. In frequent friction working conditions, wear resistance treatment should be noted. At the same time, it should be matched with the tension setting of the loom and the steel rack specification to avoid problems such as broken yarns and broken yarns caused by incompatible specifications.

In simple terms, for lightweight and flexible products, choose 840D; for general and versatile products, choose 1260D; for heavy-duty and high-strength products, choose 1680D.

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