New Functional Materials - Comparison of ETFE and PTFE

ETFE is a fluorine-containing polymer thermoplastic material, is a high-strength fluoropolymer, with good durability, easy cleaning, and stability. PTFE is a chemically inert material. The glass fiber as the substrate to form PTFE membrane. PTFE also has excellent durability, stability, and easy cleaning characteristic. The fire resistance of ETFE film and PTFE film can reach the B1 level, so they can be used for the flame retardant material.

Features of ETFE

1. The pre-tension strength can be applied.

2. Has resistance to temperature changes, can be directly exposed to the temperature of -200 ℃ -150 ℃.

3. The light transmittance can be as high as 95%. The translucency of the material can be further reduced to 50% by surface printing.

4. Has the characteristics of anti-high pollution and easy to clean, the rain can usually remove the main dirt.

5. ETFE is a completely recyclable material. After the separation of impurities, it can produce other ETFE products.

6. Has corrosion resistance, has a unique adhesion characteristic with the metal so that ETFE (F-40) and metal are the ideal composite material.

7. ETFE film life of at least 25 to 35 years.

Features of PTFE

1. PTFE is characterized by high strength. Medium strength PTFE film has the thickness of only 0.8mm, but its tensile strength has reached the level of steel.

2. The use of a wide temperature range of -70 ℃ ~ 230 ℃.

3. Has unique optical performance. At the daytime, incident light will become natural light, to prevent dazzling, no shadow, light evenly distributed, almost no UV transmission, to prevent the internal decoration materials and equipment from fading. At night, high reflection performance makes the room with excellent lighting effects, reducing power consumption. Has a high light transmittance of 13%.

4. Self-cleaning is good, the rain can wash away the surface attachment.

5. The service life of more than 25 years.

As the ETFE film is directly made from the plastic film, so its tensile strength is weaker than the  PTFE, and the one-time investment and maintenance costs are high, so fewer manufacturers has the ability to produce ETFE film. However, PTFE has a very wide range of applications, including all types of sports buildings, exhibition buildings, airport buildings, and facilities, etc.

If you are interested in the PTFE, I will recommend you this Teflon film sheet which is made of PTFE and not expensive at all. It can be used in many ways as it is hardness material of high strength and high/low temperature/corrosion resistant and very durable.

5 points you need to pay attention for your home security

Do not close the door so tightly when opening air conditioning

When the weather is hot, due to air conditioning, people usually close the room door when sleeping. At this time there is no sound outside the room can be heard, it is likely to be used by the thieves who will slip into other rooms and the living room to stole. Therefore, do not to close the door of the room completely, leaving a little gap if possible in order to hear the movement of other rooms. And it's also recommended that to set the alarm device at the other rooms and the alarm switch to be set in the air-conditioned room.

To prepare a vibration alarm

As mentioned above, it’s always more secure to have a vibration alarm for your property safety and your personal safety. This Wireless Vibration Alarm with infra-red remote control is simple to operate and install as it has the convenient magnetic back and wall mount hole. It can also be used to protect your shop, office, possessions or anywhere anything requiring protection. It’s reliable, light to carry and high quality. Most importantly, the 120dB alarm sound which can last about 40 seconds and the range is up to 25 meters! So it’s really suitable for those who are living in the suburban areas.

Set the "trap" behind the door

Before going to bed at night, you can put a large board or empty bottles and other items easy to make sound behind the door. When the thief pries the door into the room, the huge sound will scare the thieves away.

Clever use of curtains

Thieves often through the curtains to determine whether someone is at home. At working days, the whole house is empty. It’s not necessarily the most secure to close all the curtains. The clever way is to choose the aisle or the window of the kitchen without pulling the curtains and opening a lamp so that the thief might consider there is someone at home.

Security camera

Home surveillance cameras are generally not like the large shopping malls that need to monitor a wide range so you don’t need to choose the super expensive one. Monitoring cameras are generally used together with anti-theft vibration alarm. Users receive burglar alarm then  through the monitoring camera for timely monitoring to see if someone is invading. And if your  room will be no one for 24 hours, it is recommended to choose the security camera with the infrared night vision function. And don’t forget to prepare a dc 5v charger.

By the way, if you’re someone that hard to awake from sleeping, you really need a great clock to wake you up. I guess this cheap clock radio might be helpful.

Introducing all of you the Yaesu FT-897 / FT-857 Amateur Transceiver

The Yaesu FT-897

FT-897 is a small amateur radio transceiver with MF / HF / VHF / UHF band. Covering the entire range of 160 meters to 10 meters, and 6 meters, 2 meters, 70 cm band, it has the multi-band and multi-mode innovative ideas. With SSB, CW, AM, FM mode and a variety of digital communication, this transceiver is durable, excellent - performance, fully suitable for fieldwork.

The specifications of the FT-897

Before the FT-897 appeared, these advanced features it owned, can only be found from the large desktop. These advanced features including dual VFO, digital signal processor, IF adjustment, IF noise reduction, AGC level control, squelch control, IPO, and even AM band acceptance, FM radio reception, US weather forecast band reception and so on. More advanced and unmatched intelligent features include voice-activated launch, built-in electronic key, CW tone adjustment, ARS, ARTSTM, intelligent search automatic storage system, spectrum indication function, 200 regular storage channels, channel naming function, automatic shutdown function, timer shutdown function, cloning function.

The Yaesu FT-857

The FT-857D is the world's smallest HF / VHF / UHF mobile transceiver, providing base station performance from ultra-compact packaging, which is ideal for portable or external battery portable work.

The specifications of the FT-897

Before the FT-897 appeared, these advanced features it owned, can only be found from the large equipment. These features including dual VFO, digital signal processor, IF adjustment, IF noise reduction, AGC level control, squelch control, IPO, and even AM band acceptance, FM radio reception, US weather forecast band reception and so on. More advanced and unmatched intelligent features include voice-activated launch, built-in electronic key, CW tone adjustment, ARS, ARTSTM, intelligent search automatic frequency storage system, spectrum indication function, 200 regular storage channels, channel naming, automatic shutdown, timer shutdown function, cloning function.

The specifications of the FT-857

Wide frequency range

outstanding receiver performance and optional remote head operation makes the FT-857D the expert's most preferred high-performance mobile operation. The transmitter covers 50 MHz, 144 MHz and 430 MHz amateur bands and public frequency bands from 100 MHz to 56 MHz, 76 to 108 MHz, 118-164 MHz and 420-470 MHz.

Ultra compact design

The size is only 6.1 "x 2" x 9.2 ", makes the FT-857 the world's smallest multimode transceiver up to 100W. Its rugged and durable design is a masterpiece of ergonomic design, and the switch and knob position are designed to be easy to use, making the users satisfied.

Multi-function storage system

The FT-857 provides up to 200 memory channels, each of which can be named an alphanumeric label of up to eight characters. For more convenience, you can also customize the band for the next quick use.

The accessories

It’s also recommended to purchase the External S Meter SWR Power Meter For Yaesu FT-857 FT-897 for the better use. You can click the Yaesu SWR Meter to know the detailed information.

Electronic equipment DIY entry - tool selection

Why play electronic DIY, it is fun?

A: First, you can quickly grow various knowledge in this area. Second, electrical equipment might be out of work and you can fix them by your own as you have known the most principle, and your friends will ask you all questions about electronic equipment so that you no longer need to rely on the maintenance stores. Then there is the development of playing model aircraft, playing car models, but these we will talk about in other chapters.

On the choice of tools, we will first explain the most basic tool - the soldering iron.

Ordinary soldering iron

Common soldering iron is generally divided into two types: internal heat and external heat.

Advantages: cheap, can be found in any ordinary hardware stores.

Disadvantages: temperature control is not allowed, the temperature changing is slow, the tip of poor technique, poor thermal conductivity, easy to oxidize, or even burn the fever core, heat capacity is small, not easy to control and weld.

936 soldering iron

Advantages: you can adjust the temperature, not easy to burn the pad, a variety of soldering iron tips to choose from, use the 936 heating core, affordable.

Disadvantages: temperature changing is slow, tip heat conduction is poor, heat capacity is small, the temperature is not real-time digital display, bulky.

High-end product line

Speaking of high-end products, I have to mention the HAKKO Soldering Iron. The solder iron station is the hot core, tip, temperature sensor integrated design, so the temperature transfer effect is good.

Advantages: temperature rises rapidly, according to the solder joint to automatically adjust the output power, a variety of soldering iron tips to choose from, convenient to use.

Disadvantages: host prices and supplies are relatively expensive.

In this case, after comparing all kinds of the soldering irons, I will definitely recommend the HAKKO FX-951 which is high-quality and high-performance but not high-price. This soldering iron station with tip has all-in-one complex tip design, strong heat recovery for lead-free soldering and temperature control by card avoid random temperature change. And if you need any jumper cables color your DIY process, I will also offer you a smart choice.

Home Essentials Sharing - Dremel Rotary Tool Kit

If you have the interest in making handicrafts, and you also want to make the best use of your creative ideas or develop a new interest, you can consider creating your own furniture, some small items or some decorations. Speaking of this, the brand almost all the people who are fond of handicrafts will know is - Dremel. Dremel offers a wide range of product lines including electric grinders, multi-function cutting and grinding machines, hand-held circular saws and so on.

The Rotary Tool Kit haul

This artifact can help you start the training of wooden handicrafts. It can be bent to 90 degrees, which is not the most powerful function. Another very strong feature is that it provides creative panel cutting. This feature must be desired and needed by a lot of people who love craftsmanship for so long. Of course, it can be used to carve in relief and drill, so it is more than enough for a not very complex process. As a result of the easy operation, full-featured, comfort to use, this tool is also novice friendly. A variety of specific use methods are written in the instructions in an especially detailed way, so no need to worry.

The Dremel accessories

Including sanding head, charger, a variety of compatible drill bits and so on. Even though the sanding head is consuming, don’t worry, you can prepare some spare. Just click on this Dremel grinding wheel sanding head for high-quality 10pcs 12mm sandpaper for Dremel Grinding Wheel and  Rotary Tools. This sanding head is famous for handling thousands of impeller wheel flap, wheel abrasive, wheel grinding head. It’s  of sharp grinding power, high tensile strength, durability, good effect, high production efficiency and long life. The best part is the price that can be said as very affordable.

If you are interested in more wholesale electronics just go for a look! Thousands and thousands of electronics are on sale now and they might be very practical to assist you in designing and inventing your DIY art piece.

Why e-cigarette is so popular now

What is e-cigarette

In fact, e-cigarette and cigarette are completely two different things. In terms of smoke, one is the fog generated by the high-temperature atomization of the liquid, and one is the solid particles produced after combustion, purely two concepts. Therefore, the e-cigarette is an equipment which use electricity to heat the smoke generated by E-liquid, then the user inhales the smoke.

Whether the electronic cigarette is harmful

To determine if the e-cigarette has harm to your health, 90% is determined by the quality of E-liquid level. As for the E-liquid, compared to normal cigarettes, the harm is relatively quite low. Therefore, according to the use of electronic cigarette materials and the composition of the E-liquid, electronic cigarettes are more healthy and safer than the burning type of cigarettes.  Whether electronic cigarettes will harm the human body, the scientific findings have not yet unified. The smoke produced by electronic cigarettes is vapor, without any harmful substances and smoke tar, so the release of smoke is not so smelly and has less harm, so it also has some advantages for the public environment.

Help to quit smoking

Electronic cigarettes lighter taste, after a period of smoking, and then smoking ordinary cigarettes will feel particularly choking. Therefore, for those who are addicted to cigarettes, electronic cigarettes can reduce the physical and psychological dependence on cigarettes, so to help quit smoking.

Benefits compared with smoking

As the e-cigarette does not need to burn, so there is no flame, and soot and cigarette butts, so there is no fire hazard. So e-cigarette is more secure and more environmentally friendly. Good quality e-cigarette tastes good, has multiple flavors to choose, and has no smell after smoking. You can keep fresh breath so that will not cause interpersonal social distress. The e-cigarette is more convenient too. An e-cigarette equivalent to a few packs of ordinary cigarettes which is easy to carry and can be used anytime anywhere you want.

Battery

Regulating rod generally use polymer batteries, and the better one can use 18650 battery and 18350 or other models of lithium batteries(I will definitely recommend the 18650 battery charger and the 18650 battery case which is also practical). Because of the circuit board restrictions, so the pressure of the release of the current flow is about 2,100 to 3.5A, and the voltage is about 3V to 5V and has a low resistance limit, usually 1 ohm below. The mechanical cigarette rod has the current power about 6A, and the mechanical smoke rod does not limit the minimum resistance, full power state voltage of 4.2V, the minimum voltage of 2.75V. So the ego automatic battery might be an excellent choice for you.

A Look Back at the Wonderful Moments of Banggood's 11th Anniversary

Banggood hosted a 72-hour Blitz Sale from September 9th to September 11th, 2017. We hope you made the most of this groundbreaking opportunity; there were hot snap-up prices and unbeatable deals for everyone. Did you snap up something exciting?

In the month leading up to the event, Banggood launched a worldwide promotional campaign in which countless deals and activities for over 200 star brands of all categories offered to prepare the world for the gigantic 72-hour Blitz Sale, which attracted thousands and thousands of people to join the big event. News of the 11th Anniversary spread both online and offline. Advertisements appeared on large outdoor screens in America, Brasil, Japan, Thailand and across Europe. Online, the Blitz sale was translated into over ten different languages, and international new publishers spread our message across the globe.

During the 11th Anniversary celebration, Banggood reached a significant milestone. Analytic data shows that the 72-hour promotion was the largest promotional activity that Banggood has ever created. With over ten million page views and more than 300,000 orders, the 72-hour promotion was a huge success. Millions of visitors enjoyed not only great deals but also participated in the 11th Anniversary games: Puzzle Bingo, Banggood Jump and rewarding tree. The powerful mix of marketing and unbeatable prices lifted Banggood's customer base to a new stage. These new users made up 10% of the total orders placed. They were also a significant source of page views and social interaction. 

Thanks to their support, Banggood has made a great success in the Anniversary, which further solidified its position as one of the leading international online Chinese retailers. There is no It is the support from them that inspires Banggood’s staff to continually improving itself to bring the finest of China's high-quality products and the best service to you. With its slogan ‘Make it happen’, it is trying to open a limitless world of powerful possibilities for you. Every year the celebration becomes bigger and better, and we are looking forward to Banggood's 12th Anniversary.

About Banggood

Banggood is an online retailer founded in 2004, and 2017 marks their 11th year in operation. Over the past 11 years, Banggood has consistently provided high-quality products and professional services for customers from all over the globe. Energized with a team of over 2000 employees, Banggood maintains a steady growth curve and maintains its position as one of the biggest technology marketplaces on the internet.      

7 basic & essential camera accessories for photography enthusiasts

1. memory card

The memory card is certainly necessary because there are very few films camera now, and the memory card is where the photo is stored.

  

2. tripod

In order to shoot clear night photography and create the deep effect, you need to use exposure and other long-time shooting skills, this time you need a tripod to help you because only with a tripod, the camera's vibration and shaking will be reduced to a minimum so that you can shoot the highest quality photos. The aluminum camera tripod is light but high-quality which is suitable for outdoor photography.

3. UV filter

With the protection of the UV lens, even if the operation is not careful and the UV filter get dirty, you don’t directly hurt the real lens.

4. camera bag

Good camera bag will have a reasonable space settings, not only make your camera very safe, but also to ensure that they will not squeeze each other. When the photographer needs to run fast, the expensive equipment will not be hit.

5. cleaning accessories

As we need to replace the camera lens often, dust, liquid will easily get into the camera gaps. So  regular cleaning and maintenance is very important. SLR cleaning tools include brushes, rags, inflatable equipment, lens pens and so on.

6. shutter line and remote controller

The shutter line is of many uses such as still photography and night photography when the camera can maintain the stability. And the remote controller can be used in the shooting of a group photo or control the camera timing shooting which is also quite convenient.

7. handle

The handle can be convenient for the user to shoot by themselves, and you can also carry out exposure compensation adjustment and preview of the zoom adjustment.

8. external flash

Flash can be said to be one of the important parts of the SLR camera, external flash can arrive to 30 meters away, and built-in flash is absolutely not this powerful. The angle of the external flash can also be freely adjusted, and the built-in flash is fixed. External flashgun is essential for a good photo so the flashgun bracket is also necessary so that the flash can be fixed. It has a pivoting flash arm that keeps the flash over the lens in both horizontal and vertical positions.