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Showa Denko Develops WelQuick™ to Bond Dissimilar Materials Quickly

news | 30 June 2021
Tag: adhesive

Showa Denko K.K. (SDK) (Tokyo: 4004) has developed WelQuick™, a film-type binding material to bond dissimilar materials together, such as bonding between resins and metals, with excellent quickness and strength. SDK has already started to provide potential customers with samples of WelQuick™.

In recent years, manufacturing industry’s requirements for materials such as lightness, heat-resistance and strength have been advanced so much that almost no single material can meet such sophisticated needs. Therefore, there has been a progress in introduction of composite structure into components, in which dissimilar materials such as resins and metals are bound together. This movement is called “multi-materialization“. There are many methods to bond dissimilar materials, such as bonding with liquid adhesives or hot-melt adhesives, and mechanical fastening with bolts. Though manufacturers demand simple, easy and timesaving bonding process while securing enough adhesive strength. However, simultaneous achievement of simplicity and adhesiveness has been difficult.

WelQuick™, which has been developed by SDK, is a film-type adhesive component, and eliminates the process to apply liquid components which was necessary process for reactive adhesives. Therefore, WelQuick™ is easy to handle, and shortens bonding time to a few seconds by utilizing the phase change*1 between solid and liquid, while bonding with conventional adhesives takes dozens of minutes.

WelQuick™ Features:

  1. Can bond various resins (PC, PBT, PA, PPS, PMMA, ABS etc.) and metals (Al, Fe, Cu, etc.) in resin–metal, resin–resin, and metal–metal combinations.
  2. Can achieve shear adhesive strength*2 of more than 10MPa*3 with more than 40 combinations of base materials.
  3. Wide variety of welding methods: ultrasonic welding which realizes high-speed welding, electromagnetic induction welding which is suitable for metals, and heat welding which is suitable for various materials.
  4. Can be stored at room temperature for long periods.
  5. Does not produce volatile organic compounds (VOCs) when welded. Thus WelQuick™ lowers the burden on the environment.

On the basis of these strong points, WelQuick™ can contribute to customers’ cost reduction and reduction of CO2 emission through improvement in efficiency of production processes.

The Showa Denko Group has wide-ranging technologies and materials concerning inorganics, organics and aluminum. By fusing these technologies into one, the Group will provide various business fields, where multi-materialization is in progress, with new solutions, and aim to maximize the value of Customers’ Experience.

For further detail of WelQuick™ technology, please click here.

For data on the properties of WelQuick™, please click here.

[Comparison of WelQuick™ bonding method and conventional bonding method]

*1 Phase change: Changes in the state of material (gas, liquid and solid) caused by changes in temperature and pressure. WelQuick™ technology utilizes liquefaction of solid and solidification of liquid.

*2 Shear adhesive strength: Adhesive strength that acts on the surfaces of adhered materials parallel to adhered surfaces when the base materials are pulled to opposite directions to slide laterally.

* 3 MPa (Mega Pascal): The SI unit of pressure. If the two sample materials show shear adhesive strength of 10MPa, one square centimeter of adhered surface requires forces of about 100kg to be peeled off.

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SBN K-TIP™ PCBN: New KT70X Extends Life of Cutting Tools

news | 20 June 2021
Tag: automotive cBN PCBN

By F.S. & P.V.  (3 min read)

Cutting technology is an indispensable technology in the manufacturing of automobile parts.
With the evolution of automobile manufacturing technology and demand of production efficiency, the trend to find longer lifetime cutting tools is definitely growing than ever before.
This time, we would like to introduce the new PCBN K-TIP™ KT70X cutting technology from SDK Group.

Does your cutting tool fail in too short lifetime?
Many tools manufactured today fail in a relatively short period of time.
Especially, cutting tools that are used for manufacturing automobile parts.

[Lifecycle of cutting tool]
Inserting the cutting edge of the tool into the target part and grind it intermittently is the way we use cutting tool in automobile industry.
At the moment, a strong impact makes the tool edge to become worn, resulted in a decrease in sharpness overtime.
When the sharpness is reduced, it may cause higher resistance in cutting, then leads to deterioration of finished surface.
Also, it affects until machining accuracy can be failed.

Edge of the Cutting Tool
The edge of the cutting tool is composed of PCBN (Polycrystalline Cubic Boron Nitride). Therefore, our K-TIP™ technology also known as PCBN in worldwide.
PCBN has high performance as a cutting tool material because of its excellent hardness and folding resistance under high temperature, high thermal conductivity and great thermal stability.

The edge of the PCBN tool is made by integrated sintering CBN particles together with a binder (metal, ceramics) on a cemented carbide substrate at high temperature and high pressure (1200 ° C or higher, 40,000 to 60,000 atm).

What is the real cause to shorten lifetime of the tool?
Generally, the wear of the cutting edge is caused by chipping, starting from the lump of CBN.
You can imagine when only one large stone is buried in the asphalt which covered by pebbles, the crack of asphalt could start from that point if it got attached by any force.

【Top:  Inner of conventional PCBN *Lump of CBN occurs and cause for the crack
【Bottom: Inner of KT70X Filled with CBN *Improved CBN dispersibility leads to higher efficiency and longer lifetime

 Let’s solve the problem with KT70X!!
“I want to prevent the cutting edge from wearing even a little and extend the tool life.”
We have got many feedbacks from customer said above request.
In response to such customer needs, SDK has developed a new PCBN, KT70X.

Features of KT70X
・ Minimizing defects with high efficiency of CBN dispersibility
・ Suppression of crack growth
・ Increased toughness

These solutions are realized for longer lifetime and more suitable for automobile application
By using KT70X, the life expectancy could last 1.5 times longer than conventional PCBN.

Our strength
Showa Denko, which succeeded in CBN development, started developing PCBN (CBN sintered body) products by making full use of our own unique ultra-high pressure technology culture. It was successfully commercialized in 1985 and has been favored by customers all over the world under the product name SBN K-Tip™.

Features of SBN K-Tip™:
・ Wide range of product lineup, enable to supply products that meet various customer needs
・ Customized thickness of CBN and carbide substrate

If you are interested or keen on sample testing, please contact us here.

Click here to know more about SBN K-TIP™

Technical data for KT70X is available for download.

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SHODEX Chromato News June 2021

news | 15 June 2021
Tag: chromatonews shodex

NEW! Technical Article No. 13

GPC/MS Analysis of Polymer Additives

Polymers contain various additives for the additional functionality and stabilization of the product. Analysis of such additives is important for the quality control purposes in the polymer production. Those additives are typically analyzed by liquid chromatography and gas chromatography after pretreating the sample by extraction and concentration. The treatment steps are often complex and time consuming. On the other hand, by using the gel permeation chromatography (GPC), a polymer sample dissolved in an appropriate solvent can directly be analyzed. It separates the additives from polymers, and thus a simple and rapid detection can be expected.

Shodex™ Technical Article No. 8: “Ultra-Rapid Analysis of High Molecular Weight Compounds Using SEC Mode” summarized the ultra-rapid analysis of high molecular weight compounds using Shodex™ GPC HK-400 series columns, which are packed with uniformly controlled 3- or 3.5-µm styrene divinylbenzene copolymers. This article introduces the rapid, highly sensitive, and highly selective applications analyzing various polymer additives using HK-400 series columns with THF eluent and an MS detector.

✓ phenolic antioxidants (Irganox 1010, Irganox 1076)
✓ hindered amine light stabilizer/HALS (ADK STAB LA-68).

Click here to read the full PDF version.

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