Learn about tackifier addition, bulk property control factors, surface modification, and the concept of interfaces.
【Venue】 Tekuno Kawasaki 4F Conference Room 【Kanagawa, Kawasaki】 【Date and Time】 January 27, 2015 (Tuesday) 13:30-16:15 【Instructor】 Hirohito Onishi, Technical Advisor (Part-time), Engineer at Nitto Life Tech Co., Ltd. (Formerly served as Director of the Adhesive Tape Research Center at Nitto Denko Corporation, among other positions)
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basic information
**Lecture Summary** This presentation will explain the mechanism of adhesive properties through a method of measuring adhesive area using rough surface prisms. It will discuss the factors that control bulk properties such as the elastic modulus of rubber-like flat regions (plateau modulus) and glass transition temperature (Tg) when considering the basic design of adhesives. Next, it will introduce the functions and research examples of tackifiers. This section will cover the compatibility of tackifiers with base polymers (phase diagrams, Flory-Huggins equation), the reduction of plateau modulus due to the addition of tackifiers, and the shift in Tg (free volume theory, FOX equation). Finally, as research examples related to tackifiers, it will present the temporal movement of tackifiers within adhesive tapes, the properties of adhesives with two layers of different tackifiers, and the characteristics of adhesives with surface-concentrated tackifiers (preventing foaming in optical film adhesives).
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Applications made after January 14 will be 46,440 yen (including tax and text costs).
Price range
P2
Delivery Time
P2
Applications/Examples of results
**Keywords** - Adhesive - Adhesive tape - Tackifier - Adhesion promoter - Plateau modulus - Glass transition temperature - Bonding area - Compatibility - Surface concentration - Adhesive for optical films - Foam prevention - Two-layer adhesive **Program** 1. Overview of adhesives and adhesive tapes 2. Bulk properties of adhesives: Design of the rubbery plateau region elastic modulus (Plateau modulus) 2-1. About dynamic viscoelastic measurements (Meaning of G’, G”) 2-2. Method for measuring bonding area using rough surface prisms (Optical method) 2-3. Bonding area and Plateau modulus 2-4. Limit Plateau modulus that exhibits tackiness (Tackiness criterion) 3. Bulk properties of adhesives: What determines the Plateau modulus of polymers? 4. Bulk design of adhesives: What determines the glass transition temperature (Tg)? 5. Introduction of research cases related to tackifiers 5-1. Temporal movement of tackifiers within adhesive tape 5-2. Characteristics of adhesives with two layers of different types of tackifiers 5-3. Characteristics of adhesives with surface-concentrated tackifiers (Foam prevention for adhesives used in optical films) **Q&A and Business Card Exchange**
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