c2.1024mx.info,东方影库www9211dt

Welcome to the official website of Shenzhen Shengpingda Technology Co., Ltd.!
防震防潮珍珠棉厂家
contact details
National Service Hotline: 13509614675

Consulting Hotline: 0755-27737845
Contact: Miss Wan
Email: SPD800@163.COM
Address: 12 stocks in the second industrial zone of Gongming Economic Development Corporation, Guangming New District, Shenzhen

How to test the hardness of pearl cotton?

Source: Shengpingda Technology Release time: 2018-05-16 Clicks: 1080

Pearl cotton is a packaging material commonly used in the packaging industry. Pearl cotton can be used as packaging materials, sound insulation materials, floating materials and so on. However, for different occasions, the hardness requirements for pearl cotton are also different. How do we test this hardness of pearl cotton?

防静电珍珠棉

Hardness refers to the ability of a material to resist the pressing of a hard object into its surface. It is one of the important performance indicators of materials. Generally, the higher the hardness, the better the abrasion resistance. Common hardness indicators are Brinell hardness, Rockwell hardness, and Vickers hardness.

1.Brinell hardness (HB)

With a certain load (generally 3000kg), a hardened steel ball of a certain size (generally 10mm in diameter) is pressed into the surface of the material and held for a period of time. After unloading, the ratio of the load to the indentation area is the Brinell hardness value HB), the unit is kgf / mm2 (N / mm2).

2. Rockwell hardness (HR)

When HB> 450 or the sample is too small, the Brinell hardness test cannot be adopted and the Rockwell hardness measurement is used instead. It is a diamond cone with a vertex angle of 120 ° or a steel ball with a diameter of 1.59 and 3.18mm. It is pressed into the surface of the material under a certain load, and the hardness of the material is obtained from the depth of the indentation. According to the hardness of the test material, it is expressed in three different scales:

HRA: It is a hardness obtained by using a 60kg load and a diamond cone indenter. It is used for extremely hard materials (such as cemented carbide).

HRB: It is a hardened steel ball with a load of 100kg and a diameter of 1.58mm. The hardness is determined and used for materials with lower hardness (such as annealed steel, cast iron, etc.).

HRC: It is a hardness obtained by a 150kg load and a diamond cone indenter. It is used for materials with high hardness (such as quenched steel).

3 Vickers hardness (HV)

A diamond square cone indenter with a load within 120 kg and a vertex angle of 136 ° was pressed into the surface of the material, and the surface area of the material indentation pit was divided by the load value to obtain the Vickers hardness HV value (kgf / mm2).

The above is the test method for the hardness of pearl cotton. For example, when we make pearl cotton into coils, then pearl cotton needs to be softer because the sheet is mainly used to wrap some items, but if it is used as some water sticks, we need to make it harder. Higher density.


Related Products

  • 超强抗摔防震白色珍珠棉内衬

    Super shock-resistant and shock-resistant white pearl cotton lining

  • 易碎物品珍珠棉包装

    Fragile pearl cotton packaging

  • 加固抗摔高档珍珠棉包装

    Reinforced drop-resistant high-grade pearl cotton packaging

  • 防静电epe珍珠棉电子托盒

    Anti-static epe pearl cotton electronic tray

  • EPE珍珠棉抗震防摔内衬

    EPE Pearl Cotton Shockproof and Drop-resistant Lining

  • 电子产品彩盒内衬珍珠棉

    Electronic product box lined with pearl cotton

  • 优质进口料EPE珍珠棉包装

    High-quality imported material EPE pearl cotton packaging

  • 珍珠棉精美内衬 抗震防摔

    Pearl cotton exquisite lining

Popular tags: how to test the hardness of pearl cotton?

scan it

Enter Ali Store

扫一扫  进入阿里店铺
粤ICP备13077863号 Copyright © 2017 Shenzhen Shengpingda Technology Co., Ltd. All rights reserved 粤 ICP 备 13077863 号