2020年3月12日星期四

First look at the mask for coronavirus






Today, the epidemic has spread to more than 100 countries around the world, and masks will become the biggest hot product in 2020. In just two months, many logistics providers,factories, sellers,and platforms have transformed into mask sellers. Too many people have experienced this,the sellers of masks who claim to be in stock have delayed delivery after paying, delayed for various reasons,even worse,the sellers took the money and closed the business,you can never reach them again. The news reported that there were hundreds of mask fraud cases.

Demand exceeds supply, high-quality factories that meet certification and qualifications have basically been requisitioned by the government,giving priority to the supply of medical systems and severely affected areas (Wuhai,Hubei province). About mask for coronavirus,how many details do you know?

China is a big country in the mask industry, producing about 50% of the world's masks, before the epidemic,the maximum daily output of Chinese masks was more than 20 million. The fastest mask production speed is 120-200pcs per minute, but a standard process of analyzing and disinfecting takes 7 days to 15 days. Because the medical mask is sterilized with ethylene oxide, after the sterilization, there will be residual ethylene oxide on the mask,which not only stimulates the respiratory tract but also carcinogens. So the residual ethylene oxide must be released by analytical methods to meet the safety content standard. After passing the test, it can be put into the market.

The three major mask industry bases in China, Hubei Xiantao, Henan Zhengzhou, and Jiangsu Yangzhou. From the perspective of the industrial chain, manufacturers of upstream raw material,PP Non-woven fabrics, Meltblown fabrics, nose bridge strips, ear band materials, and mask production equipment and midstream mask manufacturing companies are mainly concentrated in the Yangtze River Delta region, and downstream distribution companies are too scattered.

Classification of mask

1.Classified by scope

  1.1 Medical mask: medical ordinary masks, medical surgical masks and medical protective masks.

1.2 Particulate matter protective mask: industrial use meets GB2626-2019 standard, special labor protection products safety mark (LA certification), if used for anti-fog and haze need to use insert type, with GB/T32610-2016 standard.

1.3 Thermal mask: suitable for winter wear, just need to meet the relevant standards of fabrics.

1.4 Other special industries mask: such as chemical industry,etc.

2. Classified by material

2.1 Gauze mask: Gauze mask is still used in some workshops. the requirements of GB19084-2003 standard is low, and they can only protect large particles of dust.

2.2 Non-woven mask: Most disposable protective masks are Non-woven masks, which are mainly based on physical filtration and electrostatic adsorption.

2.3 Cloth mask: Cloth mask only have a warming effect and have no effect of filtering small particles.

2.4 Paper mask: Suitable for food, beauty, and other industries, with good air permeability, easy to use and comfortable, the paper used follows GB/T22927-2008 standard.

2.5 Mask made of other materials, such as new material for bio-protection filtering.

3. Classification by wearing method

3.1 Head-mounted: Suitable for workers who wear for a long time in the workshop.
3.2 On-ear style: Easy to wear, suitable for frequent wearing.
3.3 Neck-wearing type: S-hook, some soft material connectors, connecting ear bands are converted into a neckband type, suitable for long-term wearing, more convenient for workers such as wearing hard hats or protective clothing in the workshop.

4. Classification by shape

Mask is divided into three types: flat, foldable, and cup-shaped. The flat mask is easy to carry, but have poor adhesion; folding mask is easy to carry,cup-shaped breathing space is large, but not convenient to carry.

5. Classification by protection level

Different countries and industries have different standards, which are divided into different protection levels according to different particle filtration efficiency.

Chinese standards of mask

GB2626-2019 This standard filter element is divided into two categories (KN and KP) according to the filtering performance. This type of mask can block the virus for a short time, but it cannot be used to contact patients who may have splatter or contact the patient for a long time.

GB / T32610-2016 technical specifications for daily protective mask, which are standards for the civilian mask.

YY / T0969-2013 This standard is an industry-standard for disposable medical masks. Ordinary medical masks meet this standard.

YY0469-2011 medical surgical mask is the industry standard for medical surgical masks. It is suitable for disposable masks worn by clinical medical staff during invasive operations and other procedures.

GB19083-2010 medical protective mask, this standard applies to medical work environment, filtering particulate matter in the air, blocking droplets, blood, body fluids, secretions, etc.


2020年3月8日星期日

Prevent and control Coronavirus for safe production

How to prevent and control coronavirus is very important for safe production at present.

In the spring Festival of 2020, the new virus (COVID-19) quickly attacked major cities across the country. As the Spring Festival holiday, most of our workers have returned to their hometowns. However, this year's Spring Festival is not destined to reunite as before. Traffic was controlled everywhere, the holiday extended, everything came so suddenly.


SYM Precision actively cooperated with the local government to implement the production resumption system during the epidemic.
Started open to work smoothly on February 10th, and till now, there are 98% workers have returned back to work,the factory's productivity has returned to normal. To this end, we have made many efforts to ensure safe production.



1. All work areas are regularly sprayed and disinfected.Keep ventilate workshops, offices and living areas.

2.All staff must wear mask, accept body temperature tests and make a record when entering and leaving the factory.

3.All outsider are not allowed to enter the factory area,suppliers deliver the goods stopped outside the factory and forward to SYM staff.

4. During the epidemic prevention and control period, customers are temporarily not accepted to visit.

5.For maintenance the equipment,the outside maintenance personnel must confirm the address and security code information to SYM HR department in advacne, all thing meet to control requirements,can be enter to factory under accompanying of SYM HR person.

6.All couriers are sent and received in the front of guard room uniformly.The demand person will go to the guard room to place and receive them by themselves. No courier personnel can enter the factory area.

7.All staff carry out staggered meals in three batches, scattered seats, and sat in one direction (could not sit face to face), only take off masks during meals. Don't talk during meals.

Till now all staff at SYM Precision are safe and health.We believe that we will defeat the virus soon and welcome a warm day.

2020年3月1日星期日

Choosing the Right Material for Aluminium Machined Parts



Choosing the Right Material for Your Aluminium Machined Parts.

There are many kinds of aluminium alloy in the market,only 7 kind aluminium alloy be used commonly for precision aluminium machined parts.


AL6061

The main alloy elements of AL6061 are magnesium and silicon, with moderate strength, good corrosion resistance, weldability and good oxidation.It is widely used in various industrial structures requiring high strength and antimicrobial resistance.
Generally the internal stress of T6 is bigger, the processing will be deformed, and the most suitable state should be T651.

AL7075

AL7075 materials are generally added in a small amount of copper, chromium and other alloys,It is reputed as the most excellent product in aluminum alloy, with high strength and far superior to any soft steel,Easy to process and good wear resistancee,but it can't be soldered and it's very anti-corrosive,it's better used with anodize.

Used for high - voltage structural parts,Such as aerospace, mould processing, mechanical equipment, tooling and fixtures industry.

AL6063

AL6063 material is a low-alloyed al-mg-si high-plastic alloy.It has excellent thermoplastic and can be extruded into complex structure at high speed,thin wall, Various shapes of hollow and forging parts.
Widely used in building aluminum doors and Windows, curtain wall frame,heat sink parts.

AL5083

AL5083 material is a high - magnesium alloy. It has good strength, corrosion resistance,weldability and cutting ability in non - heat treatment alloy,the surface is beautiful after anodizing.
Excellent corrosion resistance makes 5083 alloys widely used for marine applications such as ships and welding of automobiles and aircraft parts, subway light rail.

AL5052

5052 aluminum alloy belongs to al-mg alloy,with good corrosion resistance, good welding, good cold processing, and moderate strength.
Used to make aircraft fuel tanks, tubing, and traffic vehicles, the sheet metal parts of the ship,electric shell.


AL6082

AL6082 aluminum alloy belongs to Al-Mg-Si alloy,It has medium strength and good welding performance and corrosion resistance.Easy to process and easily coated.
Mainly used in transportation and structural engineering industries. Such as bridges, cranes, roof frames, transport aircraft,carrier etc.

AL2024
This is a high strength hard aluminum, which can be strengthened by heat treatment, and is of medium plasticity in quenching and quenching.Resistance to corrosion is not high, and anodizing treatment and coating method or surface are used to enhance the corrosion resistance.
It is mainly used to make all kinds of high-load parts and components (but not stamping parts) such as the skeleton parts on the plane.

Know more details please read SYM Blog.