ASTM D2256 单纱法测量纱线的拉伸性能

ASTM D2256 tensile testing of yarn

ASTM D2256 is a testing standard that specifies the method for determining the tensile properties of monofilament, multifilament, and spun yarns. It provides a testing procedure for determining maximum force and elongation and provides directions for calculating other properties such as breaking tenacity and modulus. ASTM D2256 is intended to determine the quality of the raw material while aiding in quality control of the finished product.

Materials Testing System

Due to its high data capture rate, we recommend our high tier 6800 Series test frame as the optimal solution for ASTM D2256 testing, although our more affordable 3400 Series is also appropriate. A single column frame is adequate for most single-strand yarn specimens as the loads rarely exceed 5 kN. In cases where yarn specimens require greater force, a dual column system may be needed.

ASTM D2256 Test Setup
1) 6800 Series Universal Testing System
2) Bluehill Universal Software
3) 2580 Series Load Cell
4) 2714-005 Pneumatic Cord and Yarn Grips


ASTM D2256 system setup

The most common gripping solution for ASTM D2256 are pneumatic cord and yarn grips with smooth clamping blocks, which are well suited for testing nearly all types of yarn specimens while maintaining high throughput. A specially designed horn with a smooth finish and a contoured surface with a graduated cam allows for easy loading and a stress reduced clamping area on the specimen. By incorporating a design that evenly distributes gripping force over the surface of a curved half capstan, the chances of specimen failures are reduced. 

Instron’s 2 kN capacity cord and yarn grips can also be paired with jaw faces with several other finishes to provide adequate clamping and avoid damage to the specimens during testing. The pneumatic grips allow users to fine-tune the gripping pressure in order to avoid jaw breaks or slippage. In some cases with strong or slippery yarn specimens, use of extra padding material within the clamping blocks, such as paper or emery cloth, can also be helpful.

1 kN Model | 2714-005
Tips and Tricks
  • ASTM D2256 is available as a pre-built test method within Bluehill Universal software. This method includes pre-configured calculations to help expedite test setup and simplify the testing process.

  • This standard recommends a Constant Rate of Extension (CRE) test frame for operating at a 20 second time-to-break, paired with grips that provide adequate clamping throughout testing. If the frame cannot provide a 20 second time-to-break or the grips allow for slippage while testing, the standard allows for alternative testing methods. These alternatives will likely be dependent on each yarn’s material properties.

Related Content

6800 系列高级测试系统宣传册

Instron 6800 系列通用测试系统可提供无与伦比的准确性和可靠性。6800 系列以专利申请中的操作员保障系统架构为依托,架构采用全新的 Smart-Close 空气套件并具有碰撞缓解功能,使得材料测试比以往任何时候都更简单、更智能、更安全。

2714-005 气动绳线夹具

气动绳线夹具为夹持纤维、绳、纱线和细丝提供了一种便捷的方式,可减少测试这些材料时的相关问题。额定容量 1 kN。

2714-040 气动绳线夹具

气动绳线夹具为夹持纤维、绳、纱线和细丝提供了一种便捷的方式,可减少测试这些材料时的相关问题。额定容量 2 kN。

Bluehill Universal 宣传册

Bluehill Universal 软件从头开始构建,旨在提供触摸互动和直观的用户体验。使用诸如预装测试方法、几秒钟内快速测试、增强的数据导出以及 Instron Connect(一种全新功能,可提供与服务的直接通信联系)等功能,发现更简单、更智能的测试。 Bluehill 2 和 Bluehill 3 等以前版本软件的用户可以轻松升级到最新版本的 Bluehill。