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Method of measuring glue permeability for steel cord calendered article

A technology for calendered products and steel cords, which is applied in the direction of testing the ductility of materials, testing the strength of materials by applying stable tension/pressure, and measuring devices, which can solve the problems of large deviation of values ​​and inability to distinguish the characteristics of calendered products, etc.

Inactive Publication Date: 2006-04-05
HANKOOK TIRE WORLDWIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, since the deviation of the values ​​is very large, it is not possible to distinguish the characteristics of the rolled product according to the rolling conditions

Method used

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  • Method of measuring glue permeability for steel cord calendered article
  • Method of measuring glue permeability for steel cord calendered article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The test piece 1 of Example 1 in Table 1 below was prepared, and the tensile strength was measured in a tensile testing machine manufactured by Instron in accordance with the same test method as above.

[0026] As can be seen from the results of Example 1, although the value is very small, there is still a difference with the standard deviation (2.7) of the prior art rubber permeability test with a large deviation, and the small deviation (0.9) shows the deviation between the test pieces Small, the inherent permeability of the calendered product is accurate.

[0027] That is, it is possible to derive results that allow a substantial judgment on the permeability of the compound.

Embodiment 2

[0029] In Example 2, by extending the test site from 5 cm to 10 cm, it is necessary to confirm whether the change result of the deviation is credible. It can be seen from the result of Example 2 that a larger value was shown than the result of Example 1, and there was no large change in the variation. Also compared with the comparative example of the prior art, very good result was shown.

[0030] 3+8+15 filaments

[0031] As described above, the method for measuring the sizing material permeability of rolled steel cord products according to the present invention has the advantage that in the tire rolling process, the sizing material penetrating into the steel cord can be easily evaluated, so that it can be finally used as The basic evaluation data that contribute to the improvement of the durability performance of tires can be widely used effectively.

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Abstract

A method for measuring permeation of rubber into a rolled steel cord is provided. A rubber permeation measuring method of a rolled steel cord sample(1) consisting of three or more filaments(10) using a drawing tester comprises the steps of: removing a peripheral rubber layer(2) and outermost coaxial filament(10c) from an upper portion(1a) of the sample, and the peripheral rubber layer and intermediate and innermost coaxial filaments(10b,10a) from a lower portion(1b) of the sample while remaining a longitudinal central portion(1C) of the sample in its original state; and pulling the upper and lower portions of the sample in opposite directions, to estimate the drawing strength of the sample.

Description

technical field [0001] The present invention relates to a method for measuring the properties of a steel cord rolled product of a belt portion or a carcass portion of a main reinforcement material for a pneumatic tire, and more specifically relates to a steel cord rolled product as follows: A method for determining the sizing permeability of a product, in which the tensile force due to the amount of sizing that penetrates a steel cord reinforcement made of multiple filaments wound during the gluing operation can be easily evaluated. Background technique [0002] Usually, when manufacturing tires, the so-called calendering process refers to the operation of pasting a certain thickness of rubber on both sides of the unprocessed steel cord. The reinforcement material of the unprocessed steel cord is manufactured after this calendering process. Rubberized rolled steel cord products. [0003] Further speaking, the steel cord reinforcement material is manufactured through a calen...

Claims

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Application Information

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IPC IPC(8): G01N3/28G01N3/08
CPCG01N3/04G01N3/12G01N2203/0017G01N2203/0019G01N2203/005G01N2203/0282
Inventor 闵庚信朴赞守
Owner HANKOOK TIRE WORLDWIDE