At present, many countries have developed their own COVID-19 vaccine or have chosen to import vaccines from other countries.Countries around the world have begun to carry out orderly vaccination work.Most vaccines are stored at 2-8℃, some at -25 ℃ or -70℃.However, it should be noted that both vaccines stored at 2-8℃ and lower temperatures need to be taken out of large-volume refrigerators or freezers and temporarily placed in medical refrigerators at 2-8℃ before they  are going to be vaccinated.

Considering that the number of vaccines temporarily placed on each vaccination table can not be too much, and in order to place and move easily, the small volume undercounter medical/pharmacy refrigerators become the most appropriate choice.And that's why Meling 2-8℃ smart refrigerators YC-55L and YC-75L are so popular in the market. Suitable volume for storage the vaccines at vaccination table, suitable for use as undercounter or benchtop,the refrigerators doesn’t takes up much work space of medical staff and facilitate efficient vaccination work. 10 kinds of alarm,high/low temperature,high ambient temperature,power failure , low battery,sensor failure alarm,door ajar etc. greatly guarantee the vaccine safety.Various running identifications, easy to identify the running status. Rich functions, standard with USB,RS485.Door with heater,maintain no condensation at 32℃ ambient temperature and 80% humidity. 50mm insulation layer,while others are 40-45mm.

Meling 2-8℃ smart undercounter refrigerators have been put into use in a large number of vaccination sites in community hospitals, universities, and enterprises.User's approval is the best proof of product quality.

 The Single-dose COVID-19 Vaccine Ad5-nCoV Suitable for Mass Vaccination Following the release of Phase III clinical data of two inactivated vaccines from Sinopharm Group and SINOVAC BIOTECH, the latest data of Ad5-nCoV, an adenovirus vector vaccine jointly developed by the team of Academician Chen Wei of the Academy of Military Sciences and Cansino Bio, was released on February 8.With only one injection, the protection rate can reach 74.8 %.Ad5-nCoV vaccine is the world's first COVID-19 vaccine to enter the clinical research phase which began on March 17 2020.And it is also one of the only two single-dose vaccines in the world that have released the Phase III trial data. Previously,the Johnson & Johnson in the United States announced the results of the its  adenovirus vaccine, with the overall protection rate of 66%.

The Phase III clinical trial of Ad5-nCoV was first launched in Pakistan on September 22, 2020.At present, clinical trials of the vaccine have been conducted in 78 clinical research centers in five countries on three continents and nearly 50,000 people have been vaccinated.In the results of the Phase III clinical trial conducted in Pakistan, 28 days after a single injection of the vaccine, the vaccine's protective efficacy against severe new coronary pneumonia was 100%, and the overall protective efficacy was 74.8%, without any serious adverse reactions related to the vaccine.

 Unlike inactivated and mRNA vaccines, this vaccine does not require two injections, and only one injection can be used for immunity, which is very important for the global promotion of vaccination. Although other countries in the world have successively developed COVID-19 vaccines and achieved some results, compared with international demand, it is still a drop in the bucket.

Ad5-nCoV is a single-dose vaccine so the procedure for vaccination is simple. It can vaccinate more people in the same period of time, which is beneficial to protect as many people as possible in the shortest time and can achieve rapid mass vaccination. It is reported that another advantage of the vaccine is that it only needs to be stored at 2 to 8 ℃, suitable for transportation and distribution.Mass vaccination requires a large number of refrigerators for vaccine storage.

Meling 2-8℃ pharmacy refrigerator perfectly meet the requirements of vaccine storage and preservation. 55L-130L undercounter refrigerators and 315L-1505L capacity refrigerators for your different storage requirements of various scenarios. Precise temperature control and air cooling keep the temperature uniformity within 2℃, which is comparable to a dedicated blood bank refrigerator. More than 10 types of alarms to strictly guarantee the safety and effectiveness of vaccines. If you need to store American vaccines, we also have -86℃, -40℃ ultra-low temp freezers and -25℃ biomedical refrigerators for your choice,we can meet the requirements of refrigerators and freezers covering the full temperature range.

On February 19, 2021, Pfizer Inc. and BioNTech announced the submission of new data to the U.S. FDA demonstrating the stability of their COVID-19 vaccine when stored at -25°C to -15°C (-13°F to 5°F), temperatures more commonly found in pharmaceutical freezers and refrigerators. The data have been submitted to the FDA to support a proposed update to the U.S. Emergency Use Authorization (EUA) Prescribing Information, which would allow for vaccine vials to be stored at these temperatures for a total of two weeks as an alternative or complement to storage in an ultra-low temperature freezer.

It is well known now that the Pfizer-BioNTech COVID-19 Vaccine can be stored in an ultra-cold freezer at temperatures between -80ºC and -60ºC (-112ºF to ‑76ºF) for up to 6 months. The vaccines are shipped in a specially-designed thermal container that can be used as temporary storage for a total of up to 30 days by refilling with dry ice every five days. Before mixing with a saline diluent, the vaccine may also be stored for up to five days at standard refrigerator temperature, between 2°C  and 8°C  (36°C  and 46°C ). If approved, the option to store at -25°C to -15°C (-13°F to 5°F) for two weeks would be in addition to this five-day option to store at standard refrigerator temperature. New storage option could offer pharmacies and vaccination centers greater flexibility in managing and maintaining vaccine distribution and supply. The vaccine is administered at room temperature by medical staff.

For new storage option,corresponding refrigerator is required. Actually,no matter which storage option you choose, Meling can provide you with suitable freezers and refrigerators. Our product cover the temperature from 8℃ to -164℃. For different storage options of Pfizer-BioNTech COVID-19 Vaccine,you can choose Meling products according to the table below:

Meling 2 ~ 8 ℃ ice-lined refrigerator ,which is specially designed for up to 43 ℃ high ambient temperature zones ,has passed strict PQS test , reached the internationally recognized storage standard,high temperature uniformity and safer storage and obtained the authoritative WHO certification.

he refrigerator has very precise temperature control with unique temperature control system and excellent insulation structure.Through the interactive control of the temperature in the box and the temperature of the cold accumulator,it can continuously reach the set temperature progressively, avoiding the problem of temperature undershoot when opening the door or adding new items.The 110mm super thick insulation of the cabinet greatly save energy consumption and greatly guaranteed the temperature uniformity , which is controlled within 1.7℃.

It is worth mentioning that ,with with unique system and structure ,it is absolutely the best vaccine refrigerator choice for areas with unstable power supply. The refrigerator has the first  "pre-cooling mode"in the industry,through the "pre-cooling mode", it is possible to maximize the cold storage capacity of the product before the power failure when the power failure time is known.And thanks to the 110mm super thick insulation,the holdover time is up to more than 20 hours after power failure.Compared with ordinary medical refrigerators, Meling 2 ~ 8 ℃ ice-lined refrigerator can greatly guarantee the safety of vaccines especially for areas with unstable power supply.

Besides, the refrigerator has many user-friendly designs.For example,the handle is combined with the display interface and installed on the top to facilitate observation, door opening, and function selection, avoiding the embarrassment of difficulty to observe the temperature and squatting down to adjust parameters compared to most chest refrigerator.

The optional special up and down lift type hanging frame effectively solves the common problem of storage space wasting , make the storage of items more orderly and easier to retrieve and avoid the trouble of moving other items (layer upon layer) when picking and putting.We have two models of this 2~8℃ Ice Lined Refrigerator available for different demand:YC-150EW (150 liters)and YC-275EW(275liters) .

The model YC-275EW won the bid from the Ministry of Health of Malaysia with the number of 85 units.

Meling has always been adhering to technological innovation, and we are always ready for your needs.

Food hygiene directly affects people's health. Whether it is a processing workshop or a packaging workshop in a food factory, there are very high hygiene standards and requirements. Among them, microbial contamination is the most important factor affecting the quality of food, and it is also the focus of clean engineering in food packaging workshops and processing workshops. Therefore, in the field of food production, it must be clean and safe. According to national production standards, food clean rooms need to meet the 100,000-level air purification standard. The construction of clean workshops in food factories can effectively reduce the deterioration of the products produced, extend the shelf life of food, and improve production efficiency. As the largest manufacturer of cleanroom panels in China, Wiskind puts forward the following precautions for the construction of food cleanroom factories.

1. What is a clean room?

Clean room is also called dust-free workshop, clean room, and clean room. It refers to the removal of particles, harmful air, bacteria and other pollutants in the air within a certain space, and the indoor temperature, cleanliness, indoor pressure, Air velocity and air distribution, noise, vibration, lighting, and static electricity are controlled within a certain range of requirements, and a specially designed room is given. No matter how the outside air conditions change, the room can maintain the originally set required performance characteristics such as cleanliness, temperature, humidity, and pressure.

What is a class 100,000 clean room?

There are no more than 3.52 million particles with a diameter of ≥0.5μm per cubic meter of air in the workshop. The fewer particles in the air, the less dust and microorganisms, and the cleaner the air. The 100,000-class clean room requires 15-19 air exchanges per hour in the workshop, and the air purification time after complete air exchange does not exceed 40 minutes.

How is the food clean room distributed?

General food clean room can be divided into three areas: non-clean area, quasi-clean area, clean operation area.

Non-clean areas: general storage areas for raw materials, finished products, tools, packaging and finished products transfer areas and other areas with low exposure risk of raw materials and finished products, such as outer packaging room, raw and auxiliary material warehouse, packaging material warehouse, outer packaging workshop, finished product warehouse, etc.

Quasi-clean area: no need for secondary dressing, such as raw material processing, packaging material processing, packaging, buffer room (unpacking room), general production and processing room, non-ready food inner packaging room and other finished product processing but not directly exposed areas.

Clean operation area: Refers to the highest sanitary environment requirements, personnel and environment requirements are high, and must be disinfected and changed before entering, such as: raw materials and finished products exposed processing areas, cold processing rooms for edible foods, cooling rooms for ready-to-eat foods, and waiting for packaging Storage room for instant food, inner packaging room for instant food, etc.

Points to note in clean room construction?

1. The calculation of air exchange rate in the workshop must have sufficient air exchange rate and ensure positive pressure.

2. The temperature and humidity control in the workshop has reached the requirements.

3. The locker room, buffer room, hand washing and disinfection, and other facilities for the staff's secondary change are designed to meet the requirements of the staff.

4. The design of the air shower room.

5. The installation of environmental disinfection facilities in the workshop, such as ultraviolet lamps.

6. The installation of anti-rodent and fly-proof facilities in the workshop, such as fly-killing lights.

7. The location of the air inlet of the workshop should be set up at the air inlet, and there should be a filter system, and should be closed when the machine is shut down.

8. The design of the return air outlet or the return air wall ensures easy cleaning.

9. Treatment of the workshop floor and sewers without stagnant water, and ensure that the sewers are deodorized.

10. The design of the safety door in the workshop to ensure the safety of employees.

1. What is FFU?

FFU is the English abbreviation, its full name is Fan FiIter Units, which means "fan filter unit" in Chinese. To be precise, it is a modularized terminal air supply device with its own power and filtering function. FFU keel is a modular ceiling material (FFU aluminum alloy keel) specially provided for this modularized terminal air supply device, mainly the main material of cleanroom blind ceiling.

The joints are connected by joints, including cross joints, T-shaped joints and corner joints. The entire FFU keel system is reinforced with some threads to form a whole.

2.Unique advantages:

1.The FFU keel is designed according to the characteristics of the clean room. It has a processing tube and is easy to assemble and disassemble, which is convenient for daily maintenance after the clean room is built.

2.The modular design of the ceiling system has large plasticity, which can be factory-produced and cut on site, which greatly reduces construction pollution.

3.The combination of this product is flexible, and a double-layer ceiling structure can be selected, or a single-layer ceiling with only the lower FFU keel can be used.

4.The system has high strength and can walk on the FFU aluminum alloy ceiling keel. It is suitable for local laminar flow systems, FFU systems and air purification systems of different cleanliness levels, and is suitable for electronics, semiconductors, and pharmaceutical industries.

5.The composition of the FFU keel system is also very diverse. You can install the sprinkler at the cross joint, or install some wires for the smoke detector and the lighting lamp. The clean room teardrop lighting can be installed below, and the FFU ceiling can be used with FFU at the same time. Use with fan filter unit.

3. Wiskind Cleanroom Blind Panels Specifications:

Sheet specifications: 570mm*570mm, 1170mm*1170mm, 1170mm*570mm

Panel material: color steel plate

Blind panel thickness: ±13mm

Core material: aluminum honeycomb, gypsum

Applicable places: electronic workshop, semiconductor, pharmaceutical industry, etc.

BLOOMAGE BIOTECHNOLOGY is the world's leading high-tech enterprise with hyaluronic acid microbial fermentation production technology as its core. The scale of hyaluronic acid industrialization ranks among the top in the world. Relying on the two major technology platforms of microbial fermentation and cross-linking, the company develops bioactive materials that contribute to human life and health, and has established a business system for the entire industry chain from raw materials to medical end products, functional skin care products, and functional foods. Serviing for global pharmaceutical, cosmetics, food manufacturing companies, medical institutions and end users.

As the world's top hyaluronic acid manufacturer, BLOOMAGE BIOTECHNOLOGY adopts high standards intelligence to build the world's top modern R&D and production base, both in terms of volume and technology. The R&D and production laboratories all use Wiskind cleanroom panels of 15,000 square meters, more than 300 cleanroom color steel doors, cleanroom windows, etc.

The core material of the cleanroom panel is rock wool. Under the premise of meeting the requirements of building thermal insulation, sound insulation and fire prevention, it has reached the goal of high quality, high efficiency, reliability and safety.

The construction workshop is a clean room for cosmetics. As the only one inn China to simultaneously produce sodium hyaluronate raw materials and pharmaceutical excipients by fermentation, It has realized commercial production and passed the US FDA on-site inspection four times. Still at the technical level, BLOOMAGE BIOTECHNOLOGY is the best in the industry.

In recent years, food safety issues have occurred frequently. An epidemic has made us feel the importance of food safety, especially the nutrition of students, and it has made countless parents full of worries. At present, students’ nutritional meals are uneven, the standards are not uniform, and the workshop design is backward. Looking at various conditions, it is difficult to meet the requirements of the new era for students’ nutritional meals.

In order to ensure risk-free of food safety, it is necessary to uniformly complete the procurement, storage, processing, packaging, sample retention, transportation, cleaning and disinfection of dishes in the central kitchen. Therefore, during the construction process, cleanroom wall panels need to have the advantages of corrosion resistance, high temperature resistance and easy cleaning.

Wiskind provides more than 20,000 square meters of stainless steel cleanroom panels for the Shizhicai Nutritional Catering Center, which fully meets the needs of food cleanroom wall panels. Shizhicai Nutritional Catering Center mainly serves the students of various campuses, employees of large,medium and small enterprises, providing professional nutrition, hygiene, and delicious food service, and providing consumers with healthier and nutritious fast food services.

Secondly, the key point in the construction of food workshops is waterproofing. Since processing utensils need to be cleaned and disinfected and cooking, etc., so they need to be washed frequently. Therefore, when installing cleanroom walll panels on the ground, they must be treated with waterproof floor groove. Wiskind has introduced a new stainless steel waterproof floor groove node to solve the waterproof problem. The new stainless steel  waterproof floor groove completely avoids the problem of corrosion and blistering of the panel surface due to washing, which affects the service life of the plant.

Wiskind starting from customer value, focusing on cleanroom enclosure system solutions, further exerting our own advantages, better serving customers, enhancing brand image, and making every effort to maintenance food safety and health.

What is flexural capacity?

Flexural strength refers to the ability of a material to resist bending without breaking

Cleanroom wall panels bending resistance experimental:

Sample name: double gypsum rock wool cleanroom panel

Sample information: rock wool bulk density 100kg/㎥ galvanized keel 0.6mm(T) Baosteel panel 0.5mm(T)  Saint-Gobain plaster plate 9.5mm(T)

Model specification: 3700mm*1180mm*50mm*1 piece

Inspection conclusion: Refer to GB/T23932-2009 "Metallic Surface Insulation Sandwich Panel for Construction" and GB/T29468-2012 "Technical Guidelines for the Application of Sandwich Panels in Cleanroom and Related Controlled Environment Envelopes System".

When used in Cleanroom wall panels (L0/250), the flexural capacity is 1.0KN/㎡

The ultimate load is 4.57KN/㎡

Standard for flexural capacity of partition:

According to "GB/T 29468-2012", when the deflection of the metal-faced sandwich panel for partition is L0/250 (L0 is the distance between the supports), the deflection of sandwich panels should not be less than 0.5kN/㎡.

Experiments have proved that Wiskind cleanroom wall panels have greater flexural resistance than national standards, and can be adapted to clean rooms such as pharmaceuticals, electronics, and food. The product has excellent performance, can be customized, on-site splicing, convenient and fast installation, and has diversified core materials, including rock wool, PU, EPS, paper honeycomb, aluminum honeycomb, etc. The coating and material of the panel can be selected according to the use environment. Modular cleanroom wall panels can directly open holes and reserve PVC pipes to improve installation efficiency, and the panels can be flush with cleanroom doors and windows, therefore it's beautiful after installation.

Specifications:

Advantages:

1. Core material fire ratings can be viewed.

2. The cleanroom wall panel system is used with aluminum profiles, modular installation, convenient and fast, non-standard can be customized.

3. The factory accepts customization.

4.Diversified core material for different environments, fire protection, insulation, noise reduction, moisture resistance.

5. The factory offers 6 different steel to provide customers with more services.

6. The cleanroom wall panel, strength, flatness, and aesthetics of the cleanroom panel are greatly improved, and the product quality is more stable.

7. The hole reinforcement reservation and the line pipeline box are pre-assembled into the interior of the board in the factory, effectively reducing the secondary pollution during use, especially in the operating room.

Production Technology:

1.Self-developed No.1 Automatic production line for cleanroom wall partition systems.

2. The high-efficiency production line increases production capacity by 6 to 8 times.

3. Accurately measure and control metal plate forming, gluing, core filling, composite molding, and finished palletizing.

In late-stage clinical trials in Brazil, Sinovac Biotech's vaccine has shown 78% effectiveness in fighting COVID-19, and 100% can prevent severe illness.

China Sinovac Biotech cooperated with Butanta Research Institute, Brazil's largest vaccine manufacturer, to conduct Phase III clinical research in Brazil. The agency said on Thursday that among the volunteers vaccinated, there were no severe cases. Although the effectiveness of Sinovac Biotech CoronaVac vaccine is not more than 90% like Moderna, this vaccine is easier to transport and can be stored at normal refrigerator temperature.

In December 2020, Sinovac Biotech announced that it is expected to produce 300 million doses of vaccine in 2020 and increase its production capacity to 600 million doses per year. Sinovac Biotech built a factory in Beijing for the production of COVID-19 vaccine. At present, Sinovac Biotech's vaccine research and development laboratory in China is provided by Wiskind with cleanroom materials, using a total of 15,000 square meters of cleanroom panels.

In view of the particularity of the vaccine laboratory, and taking into account the strength and aesthetic performance of the required cleanroom panels, Wiskind provides magnesium rock wool cleanroom panels, which have the advantages of drug resistance, corrosion resistance, and pollution resistance. It is a pharmaceutical experiment Ideal for room.

As a professional clean room enclosure system service provider, Wiskind has the world’s first cleanroom panels production line with independent knowledge products, which can produce a variety of core materials, and can be customized to meet the needs of different industries. It has been used in pharmaceuticals, food, electronics, and hospitals. Provide professional clean room panels and technical support services for hundreds of customers in many fields.