Month: February 2025

PFAS, also known as forever chemicals, are found in a wide range of products, from rain jackets to specialized research instruments. Due to their accumulation in the environment, they are slated for prohibition. In this article, we explore the potential risks of these substances, the upcoming bans, and possible alternatives.

Per- and polyfluoroalkyl substances, or PFAS, are a frequently discussed topic in health and environmental protection. Once released, they remain in the environment for a long time, accumulate in the food chain, and can harm both humans and the environment. These substances, known as “forever chemicals,” are detectable worldwide in water, soil, plants, animals, and humans.

PFAS are used due to their thermal and chemical stability, as well as their water- and grease-repellent properties. They are found in items such as mobile phones, wind turbines, cosmetics, solar panels, medical devices, and rain jackets, and are difficult to replace in many of these products. Despite their widespread use, the European Chemicals Agency (ECHA) has proposed a ban on the production, use, and marketing of PFAS. Companies must now review their supply chains and find alternatives.

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Event Tip: EC conference Understanding PFAS and reformulating PFAS-free coatings

In our EC conference “Understanding PFAS and reformulating PFAS-free coatings” from 18. – 19. Nov 2024 in Cologne, we will address the question of how the industry can adapt to this challenge. Learn the full story behind PFAS. Which substances are of concern, but which are useful and less critical? What alternatives already exist? Find out which areas have the most potential and where the current limits lie. In addition, international experts will report on the latest developments and innovations on PFAS and alternatives.

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Applications of PFAS

PFAS have been synthetically produced since around 1950 as they do not occur naturally. They are widely used because they are water-, grease-, and dirt-repellent, as well as temperature-resistant and durable.

Typical applications include surface treatment of metals and plastics, semiconductor manufacturing, photographic processes, and use in the automotive and construction industries. PFAS are also found in cables, seals, coolants, cleaning agents, pesticides, paints, and firefighting foams.

Furthermore, PFAS can be found, either intentionally or as contaminants, in cosmetic and personal care products, fast-food packaging, baking paper, microwave popcorn bags, muffin tins, water-repellent outdoor clothing, carpets, tablecloths, non-stick pans, baking molds, foils, cups, plates, storage boxes, impregnating agents, floor and car care products, ski waxes, and electronic devices.

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Reading Tip about PFAS

To delve deeper into the multifaceted realm of PFAS, explore the three-part article series about PFAS:

• The PFAS Controversy (1): Navigating a Global Call for Ban Amidst Complex Challenges
• The PFAS Controversy (2): Global Perspectives and Regulatory Variations
• The PFAS Controversy (3): Challenges, Innovations, and Collaborative Solutions

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Risks of PFAS

PFAS can enter the environment during their production, processing, use, and disposal. Humans primarily absorb these chemicals through the food chain and drinking water. They can also enter the human body through air, household dust, and PFAS-containing products, where they accumulate mainly in organs and blood. Studies show that PFAS are either excreted unchanged and slowly or metabolized into other PFAS. Short-chain PFAS are excreted more quickly than long-chain ones. The accumulation in the body can lead to reduced vaccine effectiveness, decreased fertility, increased cholesterol levels, higher diabetes risk, liver damage, hormonal disruptions, impaired fat metabolism, and increased cancer risk.

Source: QUMsult 2024

Product Description

1. This equipment is mechanical hydraulic PLC controlled synthesis technique equipment. Its characteristic is high efficient, easy-operated and easy-maintained. Block molding mainly by hydraulic, machinery as sideline, vibrate and press to finish molding blocks.

2. The design and manufacture of this machine accordance with the requirement and standard of

3. A high degree of automation, intelligent electronic control, automatic process is controlled by advanced PLC(Programmable Controller), input and store of process data and touch screen for blocks, it have ideal of flexible Human Conversation Interface.

4. Good reliability, Hydraulic system preference for to improved technology and perfected workmanship of design. Use independent integrated type hydraulic station. Avoid influence of dust and main machine vibration for hydraulic system.

5. Good adaptability of raw material, advanced step vibration molding technology. Adjusting measures to differing conditions. Use of all kinds of waste ash and slag, reasonably reduce the dosage of cement, make many kinds of high quality bearing or non-bearing blocks.

Main technical parameter
Model	QT6-15 Automatic block making machine
Qty/mould	6pcs/mould (hollow block 400*200*200mm)
Molding cycle	15-25s
Rated pressure	16MPa
Main vibration	Platform vibration
Vibration frequency	2800-4500 r/m
Power	28.75Kw
Pallet size	900*680mm
Dimension	7100*1500*3000mm
Factory Area	1500m2

Product Advantages

 

 

Our Customer

 

 

 

本教程适用版本：WPS 365 点击免费使用

在利用PPT演示文稿制作幻灯片时，为了体现企业文化，或者防止他人盗用，会在幻灯片当中添加专用logo，使幻灯片变得更加专业，那么一张一张的添加难免麻烦，该如何批量添加呢，一起来学习一下吧。

首先，单击工具栏【设计】下的【编辑母版】，位置如下图所示：

>>免费升级到企业版，赠超大存储空间

弹出左边编辑母版的幻灯片，显示出此幻灯片的所有版式，单击工具栏【插入】下的【图片】，选择插入本地图片：

>>免费升级到企业版，赠超大存储空间

找到电脑中的logo图标，单击后，点击打开：

>>免费升级到企业版，赠超大存储空间

打开后我们看到，所有幻灯片上都一键添加上了公司logo图片，如下图所示：

>>免费升级到企业版，赠超大存储空间

退出编辑母版的界面。再次添加幻灯片时，就会自动带上logo图标，如下图所示：

>>免费升级到企业版，赠超大存储空间

那么，在PPT演示文稿当中，批量为幻灯片添加logo的方法，是不是非常简单呢，你学会了吗？

DESCRIPTION

* Three pieces hanfu: Outer layer + Inner layer + Coverup

FUR IS NOT INCLUDED

* Material: Chiffon

* Washing Instructions: Hand Wash or Dry Clean 

NOTE: These are asian sizes, which are smaller than western sizes. Please refer to the measurements below before placing the order.

Size / CM Bust Dress Length Height XS 90 or less 125 150 S 95 or less 130 155 M 100 or less 135 160 L 105 or less 140 165 XL 110 or less 145 170

 

Please Check out HERE for more Han Dynasty Hanfu if you like this style! 

Han Dynasty 汉朝 – 202 BC – 220 AD

A recent study presents the high-valued utilisation of fly ash for preparing mechanically robust and superhydrophobic coatings.

Fly ash (FA) is an industrial solid waste which adds burden to the environment.  A new paper proposes a novel and facile way to reutilise varisized FA particles to prepare superhydrophobic coatings which exhibit excellent water-repellency and mechanical wear resistance. The FA particles undergo chemical modification (MFA), then physically mixing with polydimethylsiloxane (PDMS), and finally spraying or dipping to obtain the nano/micro, nano-micro, and nano-micro-submillimeter hydrophobic/superhydrophobic surfaces (MFA@PDMS) on versatile substrates.

Superhydrophobic even after abrasion

The results of SEM, FITR and contact angle indicate that the surface of FA was roughened after modification and the wettability of MFA particles transferred from hydrophilic to hydrophobic. The prepared nano-micro MFA@PDMS coating remains superhydrophobic even after 60 times unidirectional abrasion under 500 g weight, due to the fact that the presence of polydimethylsiloxane enhanced the binding force between inter-particles as well as particle-substrate.

The study has been published in Progress in Organic Coatings, Volume 176, March 2023.

This is a very strong, thick glass jar and complies with ASTM 2179 AND 2147 testing methods. (Ensures glass is able to withstand heat and has no cracks or fractures)

Measurements: Height 7.5cm, Width 11cm.

Approximate Volume: 350mls

Finish: Amber inner spray*

* As theses candle jars have undergone a water soluble paint finish, (rather than a solvent finish) they are more prone to scratching, so please take care when handling the jars. Washing, soaking and immersing the candle jars in soapy water will soften and deteriorate the finish. Use only a DRY – soft cloth (microfibre is best) to remove dust, prior to filling. The water soluble paint finish performs just like coloured glass during burning.

In 2007, Fluke Networks created the cable qualification market with the introduction of the CableIQ Qualification Tester. Certification is essential for building owners who need to ensure that their contractors have installed a cabling system that meets TIA and ISO standards and will support both today’s networks and tomorrow’s — but network cable qualification testers were priced out of reach for network maintenance teams. CableIQ tested cabling against network standards, such as 1000BASE-T, and provided documentation that showed what the cable was capable of.

After 15 years, it’s no longer possible for us to manufacture the CableIQ — but we have a better solution: the LinkIQ Cable + Network Tester. If you’ve been thinking about purchasing or replacing a CableIQ, here’s what you should know about the LinkIQ.

 

^{Mark Mullins of Fluke Networks demonstrates the differences between the CableIQ and the LinkIQ}

7 things to know about switching to the LinkIQ

1. No coaxial testing

CableIQ offered testing for 75 Ω coaxial cable, which the LinkIQ does not. For those who need to test coax, our MicroScanner™2 can test 50, 75, and 93 Ω coaxial cables (at less than half the price of the CableIQ).

2. Modern user interface

The CableIQ’s 2.5-inch monochrome backlit display was nice for a tester in its price range (back before smartphones), but most users today are much happier with the high-resolution color display of the LinkIQ. One example of the value of this display is the “cable speedometer” (see image below), which makes it easy to see what the cable is capable of. And the touchscreen keyboard of the LinkIQ is faster than the four arrows on the CableIQ when it’s time to enter text or cable identifiers.

^{The LinkIQ’s “cable speedometer” shows clearly what a cable is capable of.}

3. Supports today’s network standards

When the CableIQ was launched, 1 Gig Ethernet was the fastest thing on copper. Today the world is moving much faster, so the LinkIQ adds 2.5, 5, and 10 Gig cable qualifications.

4. Switch port testing

Both testers can tell you if you’re plugged into an Ethernet port, but the LinkIQ takes it to today’s speeds, recognizing 2.5, 5, and 10 Gig-capable switch ports. And the LinkIQ adds valuable information about the switch itself: name, IP address, port number, and VLAN. This information helps solve problems where the user is plugged into the wrong switch or port, or the switch is improperly configured.

5. Network Connectivity Testing

LinkIQ can be set up to ping an IPv4 or v6 device, then it displays the results of 4 pings, including response time. This can determine if the network can provide access to key servers or services. The LinkIQ’s address can be set manually or via Dynamic Host Configuration Protocol (DHCP). This not only helps debug DHCP problems but allows the user to see the gateway and Directory Name Services (DNS) servers in use.

6. Power over Ethernet

When CableIQ hit the market, Power over Ethernet (PoE) had just started to show up in networks. CableIQ can sense some installations of PoE, mostly as a warning that it should be disconnected to prevent damaging the tester. LinkIQ is built for today’s PoE world, certified by the Ethernet Alliance for compatibility with all current IEEE PoE standards: 802.3af, at, and bt. Not only is it safe to connect, but it will also display the power levels offered by the switch (up to Class 8 or 72 watts), which pairs are powered, and whether the source is single- or dual-signature. To confirm that power is available, the LinkIQ places a load on the switch and ensures that adequate voltage is present. If you’re installing PoE devices, such as access points or cameras, these features can save hours of trial-and-error troubleshooting.

7. LinkWare™ PC Reporting

CableIQ offered its own documenting and reporting package, the CableIQ Reporter. LinkIQ is compatible with LinkWare PC, our industry-leading reporting package that supports our certification testers — even those that were obsoleted before the launch of CableIQ! Tens of thousands of electricians and technicians use LinkWare Live regularly; the single application for storing and reporting all your work makes life much easier.

In addition to its key advantages, LinkIQ also offers several smaller conveniences: a rechargeable battery that’s compatible with standard USB-C chargers, a one-button control that automates the testing process, user support in 12 languages, and a strap to hang it up while you’re working.

Check out LinkIQ’s differences for yourself.

Video Comparison Virtual Demo Talk to an Expert

Keep learning

• • How to Use a Network Cable Tester – LinkIQ
• • VLAN Troubleshooting with LinkIQ
• • Are your fiber optic cables and testers ready for 400G Ethernet?

A fluorine-free coating with superior anti-smudge performance, remarkable wear resistance and high transparency was constructed. The study provides a new way to comprehensive performance waterborne polyurethane coating.

A fluorine-free anti-smudge waterborne polyurethane coating was constructed via the dispersion of hexamethylene diisocyanate trimer into organosilicon-grafted waterborne polyurethane. In the film-forming process, the interaction among carboxyl, hydroxyl and isocyanate groups blocked the hydrophilic groups and improved the density of the coating, thereby preventing contaminants from penetrating into it. Furthermore, the organosilicon side chain migrated onto the coating surface to form a low surface energy amphiphobic layer, which endowed the coating with superior anti-graffiti performance.

Robust anti-graffiti performance

The surface energy of the as-constructed coating was 24 mN m⁻¹. The water, diiodomethane and hexadecane contact angles were 95°, 70° and 36°, respectively, with corresponding sliding angles of 35°, 10° and 1°, thereby showing that the coating had no affinity to oil- and water-based ink graffiti. More strikingly, the anti-graffiti performance remained after 400 abrasion cycles under a pressure of 110 kPa and under harsh chemical treatment (strong acids, bases and salts). The constructed coating also showed an optical transparency as high as 93 % due to the high crosslinking degree.

The study has been published in Progress in Organic Coatings, Volume 174, January 2023.