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Apparatus and method for measuring degree of cure of adhesive agent

a technology of adhesive agent and cure method, which is applied in the direction of measuring devices, instruments, phase-affecting property measurements, etc., can solve the problems of time and effort, high cost of available measuring apparatus, and inability to measure accurately

Inactive Publication Date: 2012-12-27
NIPPON SHEET GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an apparatus and method for measuring the degree of cure of adhesive agents. The apparatus includes an optical fiber with a tip face that emits light, a probe for holding the adhesive agent in contact with the tip face of the optical fiber, and a detector for detecting light returning from the interface between the tip face of the optical fiber and the adhesive agent. The refractive index of the adhesive agent is calculated from the detected light amount and the emission light amount, and the degree of cure is measured based on the calculated refractive index. The apparatus can provide a more accurate and reliable measure of the degree of cure of adhesive agents, which is useful in various industrial applications.

Problems solved by technology

Therefore, much time and efforts are necessary, and also an available measuring apparatus is expensive.
With respect to the DSC method, much time is taken to prepare and measure samples, and also it is impossible to grasp the relationship between temperature and curing time.
With respect to the method with the micro-hardness tester, it is necessary to prepare many samples cured under different temperature and time conditions and also measure all of these samples; therefore, much time and efforts are necessary.
In addition, this method has a problem that it is difficult to quantify a measurement result.

Method used

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  • Apparatus and method for measuring degree of cure of adhesive agent
  • Apparatus and method for measuring degree of cure of adhesive agent
  • Apparatus and method for measuring degree of cure of adhesive agent

Examples

Experimental program
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first embodiment

[0050]FIG. 1 is a diagram illustrating a degree of cure measuring apparatus 10 according to a first embodiment of the present invention. As illustrated in FIG. 1, the degree of cure measuring apparatus 10 has a laser diode (LD: Laser Diode) 12, an LD driving circuit 14 for driving the laser diode 12, an optical splitter 16, a probe 18, a detector 20, a first optical fiber 24 by which the laser diode 12 and the optical splitter 16 are connected to each other, a second optical fiber 26 by which the optical splitter 16 and the probe 18 are connected to each other, a third optical fiber 28 by which the optical splitter 16 and the detector 20 are connected to each other, and a computer 22 connected to the detector 20. The degree of cure measuring apparatus 10 is a apparatus for measuring the degree of cure of adhesive agent 36 held in the probe 18.

[0051]The laser diode 12 emits measurement light to be applied to the adhesive agent 36, and a laser diode having an emission center wavelengt...

second embodiment

[0080]FIGS. 8A and 8B are diagrams illustrating a refractive index measuring apparatus according to a second embodiment of the present invention. The refractive index measuring apparatus according to this embodiment is a apparatus for measuring the absolute refractive index of a material.

[0081]The refractive index measuring apparatus according to this embodiment has a similar structure to the degree of cure measuring apparatus 10 illustrated in FIG. 1. In this embodiment, the probe 18 is configured so that the capillary 30 is provided to the tip portion of the second optical fiber 26. The tip face of the capillary 30 and the tip face 26a of the second optical fiber 26 are arranged on the same plane. A method of measuring the absolute refractive index by using the refractive index measuring apparatus according to this embodiment will be described below.

[0082]First, as illustrated in FIG. 8A, the tip face 26a of the second optical fiber 26 is brought into contact with a material M1 wh...

third embodiment

[0089]FIG. 9 is a diagram illustrating a degree of cure measuring apparatus according to a third embodiment of the present invention. As illustrated in FIG. 9, a degree of cure measuring apparatus 1010 has a laser diode (LD: Laser Diode) 1012, an LD driving circuit 1014 for driving the laser diode 1012, an optical splitter 1016, a probe 1018, a detector 1020, a first optical fiber 1024 by which the laser diode 1012 and the optical splitter 1016 are connected to each other, a second optical fiber 1026 by which the optical splitter 1016 and the probe 1018 are connected to each other, a third optical fiber 1028 by which the optical splitter 1016 and the detector 1020 are connected to each other, and a computer 1022 connected to the detector 1020. The degree of cure measuring apparatus 1010 is a apparatus for measuring the degree of cure of adhesive agent 1036 placed on a glass plate 1039.

[0090]The laser diode 1012 emits measurement light to be applied to the adhesive agent 1036, and a ...

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Abstract

A degree of cure measuring apparatus has: a second optical fiber for emitting light from a tip face thereof; a probe for holding adhesive agent and irradiating the adhesive agent with light while the adhesive agent is in contact with the tip face of the second optical fiber; a detector for detecting light that is reflected from an interface between the tip face of the second optical fiber and the adhesive agent and then returns to the second optical fiber; and a computer for calculating the refractive index of the adhesive agent from the rate of the light amount of the light detected by the detector to the emission light amount from the tip face of the second optical fiber.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a apparatus and a method for measuring the degree of cure of adhesive agent.[0003]2. Description of the Related Art[0004]Adhesive agent such as epoxy type adhesive agent has been used in an assembling process of optical device or electronic device. It is necessary to measure the degree of cure of adhesive agent in a production process using such adhesive agent for the purpose of (1) grasping the temperature and time at which adhesive agent cures and determining a cure condition; (2) checking whether adhesive agent is cured as expected under a specified temperature and time condition when adhesive production lot is changed; and (3) checking whether adhesive agent is cured as expected under a specified temperature and time condition when the adhesive agent has been stocked for a long term.[0005](1) An FT-IR method (see JP-A-2007-248431, for example), (2) a DSC method (see JP-A-2-229741, fo...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01N21/41
CPCG01N21/431G01N21/47G01N2021/432
Inventor FUKUZAWA, TAKASHITANAKA, HIROYUKI
Owner NIPPON SHEET GLASS CO LTD