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On February 23, Shanghai Petrochemical's emergency R&D and conversion of special melt-blown non-woven fabrics was successful in trial production.
It can produce 6 tons per day, which will help add nearly 6 million pieces of disposable medical masks per day
.
Photo by Li Yinghao, special material for meltblown cloth▲
Photo by Li Yinghao, special material for meltblown cloth▲
Photo by Li Yinghao, special material for meltblown cloth▲
At present, masks on the market are being produced urgently, but the raw material of masks, meltblown cloth, is still a restrictive factor in mask production
.
Cut a used medical mask (a new one is fine, but I advise you not to waste it), and you will find: the mask has three layers
.
S layer: polypropylene special resin (Sinopec) - non-woven fabric factory - mask factory
M layer: polypropylene special resin (Sinopec)-modified plastics factory (During the epidemic prevention period, Sinopec tackled key problems and produced special materials for melt-blown cloth)-melt-blown non-woven fabric factory-mask factory
.
Meltblown cloth, commonly known as the "heart" of the mask, is the filter layer in the middle of the mask, which can filter bacteria and prevent the spread of germs.
Its fiber diameter is only one-thirtieth of the hair
.
Although the raw materials are all polypropylene, the production process and performance of the special materials for meltblown fabrics and other non-woven fabrics are very different
.
Meltblown cloth▲
Meltblown cloth▲
Meltblown cloth▲
"The special material for melt blown cloth is polypropylene with high melt index
.
In order to solve the problem of high melt index, Shanghai Petrochemical established a research and development team to carry out formula research, test analysis and scale-up experiments, and strived to overcome various difficulties in equipment and technology, and finally successfully overcome the problem of high melt index polypropylene modified production
.
It is reported that through process optimization, Shanghai Petrochemical is expected to increase production by about 2 tons per day in the short term, reaching a daily output of 8 tons of special materials for meltblown cloth
.
The employee is analyzing the melt index of the sample.
Photo by Xu Ruoshun▲
In addition, since the outbreak of the epidemic, Shanghai Petrochemical has temporarily changed its production schedule to produce medical and health materials that are in short supply in the market at full capacity, and has supplied a total of 6,776 tons of polypropylene medical materials to the market
.
Previously, Yanshan Petrochemical, a subsidiary of Sinopec, successfully developed a special material for polypropylene meltblown non-woven fabrics on February 10, and has supplied 2.
9 tons of raw materials to the market
.
Photo by Li Yinghao▲
In addition, on January 31, in response to the shortage of medical materials such as medical masks and the high prices, Sinopec promised that during the anti-epidemic period, the prices of raw materials related to medical and health materials will not increase
.
In addition, continue to adjust production capacity, prioritize the production of raw materials for medical polypropylene chemical products such as masks and syringes, and ensure high-quality, sufficient and timely supply.
It is expected to produce 95,000 tons in February, an increase of 30,000 tons over January
.
Changling Refinery and Chemical Department is at full capacity to produce non-woven polypropylene special material photo by Li Pei▲
