Narrow gap curing type - Ajinomoto Fine-Techno Co.,Inc.

What is the PLENSET_TM narrow gap curing type?

PLENSET_TM Impregnation Adhesive Type is a one-component epoxy resin adhesive that applies an innovative curing system in a fully liquid form.
It ensures uniform curing even in narrow gaps or with small amounts of application, preventing curing defects due to component separation and enabling stable adhesion.
By heating within a temperature range of 80°C to 120°C, it fully cures in approximately 30 to 60 minutes. This temperature condition and curing speed are highly flexible in the manufacturing process, accommodating various production takt times.
The outgassing from the cured material is extremely low, making it ideal for assembling precision machinery that requires high low-outgassing properties. It is particularly effective in applications where minimizing the impact of outgassing is crucial, such as HDD components.
PLENSET_TM Impregnation Adhesive Type has an excellent pot life (usable time) at room temperature, maintaining stable dispensing processes even during long work periods or mass production. This characteristic ensures uniform quality in assembly work that requires high precision, contributing to improved product reliability.

Have you experienced these issues?

Adhesion and encapsulation by pouring into gaps after parts assembly

case

01

Uncured separation occurs when pouring into narrow spaces.

case

02

To perform impregnation bonding and encapsulation at low heating temperatures

case

03

Here is the product that resolves these issues. PLENSET_TM Narrow gap curing type

It enables adhesion and encapsulation without uncured separation even when applied in minute amounts to narrow areas and gaps of 10 µm or less.

Feature

#1

Applying our proprietary no particle curing system provides low-temperature curing properties.

Feature

#2

We have a lineup of low-viscosity products that are easy to pour.

Feature

#3

Application

HDD spindle motor assembly
Motor magnet adhesion

Narrow gap curing type application example

HDD spindle motor adhesion

Item			AE-403H	AE-740	AE-770SF	Conditions
Characteristics	Color tone and appearance		Black viscous liquid	Black viscous liquid	Red viscous liquid	Visual inspection
	Viscosity		7Pa･s	13Pa･s	7Pa･s	E-type viscometer, 25degC、50rpm
	Thixotropic index		1.1	1.3	1.1	E-type viscometer, 25degC、5rpm/50rpm
	Gel time		65seconds／80degC	22seconds／80degC	12seconds／90degC	Hot plate
Standard curing conditions			80degC×30minutes	80degC×60minutes	90degC×60minutes	Hot air circulation oven
Properties of cured materials	Tensile lap shear strength		14N／㎟	18N／㎟	18N／㎟	JIS K-6850 (Steel plate)
	Glass transition temperature		35degC	51degC	100degC	TMA measurement
	Thermal expansion coefficient	α1	71ppm	94ppm	70ppm
	Thermal expansion coefficient	α2	192ppm	179ppm	159ppm