Classification of Vacuum Level

he so-called “vacuum” refers to a gaseous state where the pressure in a given space is less than 101325 Pascal (i.e. a standard atmospheric pressure around 101KPa).

The standard or unit of vacuum measurement is called vacuum level. In the international general standards and China’s current standard in force, the most commonly used unit in vacuum measurements is Pascal ( Pa.). 1 Pa is equal to 1N/㎡. The unit used in technical atmosphere is Bar.1Bar=1kgf/cm2. The unit now used less often is torr. 1Torr is defined as 1/760atm.

International general classification of vacuum levels

The international standard usually divides the vacuum into four levels: low vacuum, medium vacuum, high vacuum, and ultra-high vacuum. In absence of strict criteria, the vacuum levels are roughly divided as follows:

Low Vacuum Level   （< 105~102Pa）  —— The pressure difference obtained by low vacuum is used to clamp, lift and transport materials, as well as to vacuum and filtrate (e.g. vacuum cleaner, vacuum suction cups, etc.)

Medium Vacuum Level （< 102~10-1Pa） —— Medium vacuum is generally used to remove the gas or moisture that is retained and dissolved in the material, as well as for vacuum heat insulation and isolation (e.g. food vacuum freezing, vacuum drying, vacuum packaging, etc.)

High Vacuum Level  （< 10-1~10-5Pa） ——vacuum smelting, vacuum coating, and manufacturing of vacuum devices can be done by using the characteristics of low density of residual gas and weak chemical action of any substance in high vacuum. A typical product is vacuum insulated glass. Vacuum insulated glass refers to the glass consisting of two or more pieces of flat glass with micro supporting spacers inside and edges sealed to create vacuum chamber in between. In principle, the vacuum level inside the vacuum insulated glass is lower than 10-1pa, so that the factors such as heat transfer by gas and sound transmission can be ignored.

Ultra-high Vacuum Level  （< 10-5Pa） —— In the ultra-high vacuum state, there is almost no atoms or molecules. It can be used for simulation of a space environment, as well as researches on surface physics and surface chemistry, etc. 

From：https://www.landvac.net/

US Scientists Developed New Glass Battery

John Goodenough, professor in the Cockrell School of Engineering at The University of Texas at Austin and co-inventor of the lithium-ion battery, recently published a paper on the development of a new battery technology. The new technology uses glass doped with alkali-metal atoms such as lithium or sodium as the battery electrolyte (the medium that transports the ions between the anode and the cathode during battery charging or discharging).

They find, for instance, that the lithium- or sodium-glass battery has three times the energy storage capacity of a comparable lithium-ion battery. But its electrolyte is neither flammable nor volatile, and it doesn’t appear to build up the spiky “dendrites” that have plagued lithium-ions as they charge and discharge repeatedly and can ultimately short out, causing battery fires. Besides, the glass battery charges in “minutes rather than hours and early tests of their technology suggest it’s also capable of perhaps thousands of charge-discharge cycles, and could perform well in both extremely cold and hot weather. (Initial estimates place its operating range between below -20º C and 60º C.) 

Goodenough said that his team is ready to welcome the golden moment. The next step is to solve the issues with the cathode. Commercialization is possible after practical application testing.

FROM:https://www.vacuum-glass.net/

LandGlass Is Going to Attend CBD Fair (Guangzhou) 2019

China(Guangzhou) International Building Decoration Fair, also known as the CBD , features a unique style of cross-discipline bespoke home furnishings and provides integrated solutions for building decoration industry. Numerous famous brands launch their new products and strategies here by showcasing their cutting-edge design and technologies. The CBD Fair has become a "Debut Platform for Champion Enterprises".

As one of the leading enterprises in the glass processing industry, LandGlass is going to attend CBD 2019 as scheduled and present the high performance energy saving material ---LandVac tempered vacuum insulated glass. We are looking forward to seeing you there!

Date: 

July 8-11, 2019

Venue:

Booth No. 17, Hall 15.1, zone C , Canton Exhibition hall, Haizhu District

Highlights：

LandVac Tempered Vacuum Insulated Glass

LandVac vacuum insulated glass has won its outstanding reputation in many areas including energy efficient buildings, intelligent home appliances, vehicles, national defense and military with excellent soundproof and superb thermal insulation properties. In addition to the regular vacuum insulated glass, LandGlass also provides tailored solutions for special shaped vacuum glass, fire-rated vacuum insulated glass, and allowing you to enjoy a low-key luxury.

FROM:https://www.landvac.net/

LandGlass is Proud of being Awarded Licensing among the First Vacuum Insulated Glass Manufacturing Companies

The establishment of the Beijing-Tianjin-Hebei Ultra-Low Energy Construction Industry Alliance was held on June 5 in Beijing with grand opening. Vacuum Insulated Glass is the preferred window glass choice for passive houses and ultra-low energy buildings construction. China Architectural Glass and Industrial Glass Association concurrently held a press conference for the “First Batch of Vacuum Insulated Glass Production Enterprises to be Awarded Licensing”. Under the joint witnesses of hundreds of representatives from the Industrial Technology Innovation Strategic Alliance in the low-energy consumption building industry and dozens of well-known domestic news media, LandGlass had been awarded the medal, with its products certified by the association. This move not only set a benchmark for the standardized production of Vacuum Insulated Glass industry in China, it also pointed out the direction for ultra-low energy building developers in material choice.

As an enterprise certified by the association for its Vacuum Insulated Glass products, LandGlass is one of the few enterprises in the building material industry in China that has its own independent intellectual property rights which can realize and achieve automation and mass production, an enterprise with world-leading standards. As a leader in Vacuum Insulated Glass, LandGlass has newly developed an innovative product with independent intellectual property rights - LandVac^®. Developed by our company’s nearly hundred peopled R&D team, LandVac® vacuum glass has undergone eight years of research and development, and equipped with world-leading standards. LandVac^®’s thermal transmittance can be as low as 0.4W/(m²·K), meeting the requirements in windows and doors thermal transmittance for international passive houses. In addition, LandVac^® vacuum glass has obtained multiple certifications, with RoHS (lead-free) certification, ISO quality system certification, SGCC safety glazing certification, passed the German ift thermal transmittance test, sound isolation test, ATI wind resistance test, and ANSI impact resistance test. LandVac® has demonstrated superiority leading the industry in terms of thermal insulation, noise reduction, condensation free, safety, and light and thin structure. Our product is already widely used in fields such as scientific research, construction, and household appliances.

Accompanied by our government's policy support in the promotion of passive housing and the continuous construction of passive housing projects worldwide, there will be more and more Tempered Vacuum Insulated Glass applications in the future. As the first batch of certified Vacuum Insulated Glass manufacturers in China, LandGlass will firmly fulfill its corporate responsibilities, adhere to the pursuit of quality, continuous innovation, and mission to benefit global customer, contributing our due in passive ultra-low energy construction, global energy conservation, green building, and the environmental protection industry.

FROM：https://www.vacuum-glass.net/

LandGlass - Riding on the Wave of “Made in China 2025”

The 29th China Glass Expo 2018 for Glass Industry was rounded off on April 22. At this expo, LandGlass attracted a large number of new and existing customers to the booth with our three core leading technologies and products: intelligent glass tempering furnaces, intelligent glass processing solutions and fully tempered vacuum insulated glass. 

Intelligent glass tempering furnace is a recent quantitative breakthrough of LandGlass after years’ of innovative technology accumulation in various areas: Thanks to the big-data based professional intelligent identification and operating systems, the smart glass tempering furnaces can automatically select the set of parameters that are most suitable for the job, effectively improving both productivity and product quality. Market feedback indicates that LandGlass’ intelligent glass tempering machine is widely praised in the industry. In 2017, as the manufacturer of the core equipment with intelligent interoperability that connects both upstream and downstream processes in the glass processing industry, LandGlass introduced the intelligent production solutions for glass processing. By combing the innovative technologies and processes of LandGlass with leading AI and smart control technologies, the solution successfully established the automatic links between all stages in glass processing, making it possible for the customers to build their own smart factory.

LandVac^® --- redefining the standards for safety, energy efficiency, and comfort. Adhering to this concept, LandGlass has made continuous effort to commercialize the latest technologies developed by the company. At present, LandVac^® has successfully passed some of the most reputable certification tests in the industry including ISO9001 quality system certification, ift thermal transmittance test, and sound isolation test. Furthermore, it also becomes the first domestic glass product certified by SGCC in the US as safety glass. The applications of LandVac^® in architectural, scientific research, and home appliances areas have revealed its excellent properties in sound isolation, thermal insulation, and condensation resistance that lead the industry, allowing users to enjoy the quality of life. 

In order to demonstrate the best of LandVac to customers, LandGlass offered tech seminars on vacuum insulated glass at the expo every day along with LandVac fragmentation tests, showing the seven major advantages of the fully tempered vacuum insulated glass. In addition, LandGlass also announced at the expo to recruit a number of representative homeowners nationwide for an opportunity to replace their window glass with LandVac^® for free and to experience the outstanding performance of LandVac^® first hand while enjoying the healthy green life brought to them by LandVac^®. 

During the 4-day exhibition, thousands of customers from several dozens of countries and regions around the world visited LandGlass’ booth, inquiring its latest smart glass tempering furnaces, intelligent glass processing solutions, and the fully tempered vacuum glass products, exchanging experiences in glass processing, and discussing the prospects and trends of the industrial development. Looking forward, under the guidance of LandGlass’ principle for continuous innovation, while continuing its effort to incorporate intelligent manufacturing and production in glass processing industry and leading the industrial technology forward, the company strives to develop advanced technologies that will allow enterprises in the glass processing industry around the world to challenge themselves and succeed!

FROM：https://www.vacuum-glass.net/

LandGlass Tempered Vacuum Insulated Glass Received CCC Certification

Recently, according to the on-site supervised inspection and the national product inspection standards, China Building Material Test & Certification Group Co., Ltd. (“CTC”) confirmed that the insulated glass, vacuum insulated glass, and tempered glass manufactured by LandGlass are in conformity with the National Safety Glass Compulsory Certification Standards, and granted the CCC (”China Compulsory Certification”) certification.

3C certification is a product conformity assessment system implemented in accordance with the laws and regulations. It is the most basic safety certification to protect consumers’ personal safety and national security and strengthen the management of product quality. The core of the 3C certification focuses on “Safety”. At LandGlass, we are committed to not only the safety of products, but also the safety of our staff and environment. In addition to SGCC safety certification, RoHS lead-free certification, and other authoritative safety certifications that concern the vital interests of consumers, LandGlass has professional safety consultants to establish a sound occupational health and safety management system as well as the environmental management system. More than providing safety assurance to the employees and the production, this system makes LandGlass an enterprise with environmental consciousness by assuming social responsibility and striving for a safer and better world!

From:https://www.vacuum-glass.net

LandGlass ranks in the 2018 China’s Top 1,000 Innovative Enterprises List

On November 1st, the release conference of 2018 China’s Top 100, Top 1,000, and Top 10,000 Innovative Enterprises List was successfully held in Renmin University of China, co-sponsored by the Chinese Economic Reform and Development institute and the School of Economics of this university . With the support of the huge Innovation Capability Database of Chinese Enterprises, the list is the outcome of a comprehensive evaluation of more than 100,000 Chinese high-tech enterprises based on their patent quantity , patent quality, the diffusion of innovative values and and the network promotion of innovations, which is conducted in the largest scale and with the latest concept. LandGlass Technology Co. Ltd ranks in the list and is the only company of the glass processing industry among the 25 listed companies from Henan Province.

LandGlass is well deserved for this honor. Up to now, LandGlass has submitted over 600 patent applications worldwide and has been authorized more than 400 patents, which is the only enterprise that has won the China Patent Gold Award for two consecutive years in the glass processing industry. Meanwhile, LandGlass is one of the first enterprises recognized in Henan province that has implemented the Intellectual Property Management System and has also passed the National certification processes. Furthermore, LandGlass is approved by the Post-doctoral Management Committee in 2018 to set up a post-doctoral scientific research station, paving the new way to combine production, education and research. On the road of innovation-driven development, LandGlass has continuously adopted the latest intelligent technologies to produce the world leading tempered Vacuum Insulated Glass products and various Glass Tempering Furnaces, which has been sold and highly recognized in both domestic as well as international markets. Ranking in the 2018 China’s Top 1,000 Innovative Enterprises List is not only the full affirmation of LandGlass’s innovation development strategy, but also reveals that Chinese manufacturing industry is striving to forge ahead on the independent innovation road and will open a new and magnificent era!

From:https://www.vacuum-glass.net/