① thermal insulation products
As the meltblown nonwoven fibers in the fiber belongs to the ultra-fine fibers, lightweight, soft feel, good warmth, and at the same time, meltblown nonwoven fibers between the gap is small, and the void rate is large. Air permeability is very superior, which determines the meltblown nonwoven is very excellent thermal insulation materials.
Meltblown thermal insulation material domestic development is very fast, many domestic enterprises are meltblown fibers for this purpose. Tianjin TEDA eco-cotton is actually composed of meltblown fibers. Figure 2 for the form of TEDA eco-cotton, it is in the second layer of meltblown cloth with spacing between the stacked layer of special structure of the flocculent, so that it has more air gap, so that the meltblown warming materials for better warmth. Tianjin TEDA Group's eco-cotton has become a nationally recognized brand. This material has been favored by the army logistics department, some troops have been using meltblown fiber warming materials to make sets of clothing equipped with troops.
In addition to the role of warmth as clothing flocculent, meltblown fiber flocculent can also be rolled in the steam pipeline, liquid pipeline or other storage apparatus in need of adiabatic appearance to serve as an effective thermal insulation, so as not to heat or cold loss. The United States 3M company has developed a series of thermal insulation products for various purposes. Its core technology is to meltblown fiber as the basic material. However, such as all the meltblown fiber, the beginning of the insulation is very good, to be meltblown wadding after a period of time after the use of easy compaction, the air gap is not there, the role of thermal insulation will be greatly reduced, so it is necessary to meltblown fiber in the uniform mixing of a certain amount of coarse polyester fibers, so that wadding is always maintained between the uniform distribution of the air gap. Baosteel has developed original technology that, it is claimed, can do the same.
② filter material
Meltblown nonwoven fabrics due to its fine fiber diameter, large surface area, small pores, high void ratio is very suitable for liquid-solid separation or gas-solid separation of filter material. In the air filtration, it can be suitable for sub-high efficiency filtration. Such as labor protection and medical masks, gas masks, filter out dust, bacteria and other harmful particles, can also be used for air conditioning, automotive air filtration and engine air filtration, especially when the meltblown fibers by the emplacement polarization treatment, air filtration filtration efficiency can be more than 99%, or even up to 99.999%, can be suitable for electronic equipment and other high-demanding ultra-clean workshop air purification places, in 2003, to prevent SARS infection, meltblown nonwoven fabrics are suitable for air filtration, and can also be used for air filtration. In 2003, in order to prevent SARS infection, meltblown nonwoven fabrics had a hot sale for a while, because the meltblown nonwoven fabrics by the stationary polarization treatment as masks or masks can effectively prevent the invasion of bacteria and viruses.
In the past, some of the high demand for air filtration commonly used micro-fiberglass filter media, in recent years, research has shown that: fiberglass is easy to break off, harmful to humans, and may even cause cancer. The World Health Organization IARC classifies glass fiber as class IB, which is a possible carcinogen. In addition, the glass fiber can not be added to the electrostatic charge for electropolarization, so with the passage of time, meltblown filtration materials will be more and more widely used.
③ Oil-absorbing materials
China is a large oil-consuming country, consumption has accounted for the world's second largest. China's maritime transportation industry is developing rapidly. Oil spills from tankers and oily sewage discharges from ships often occur, seriously polluting water quality, especially coastal ports, bays and coastal waters is more so, bringing serious consequences to the ecological environment.
Polypropylene meltblown nonwoven fabric due to its ultrafine fiber structure, with hydrophobicity and lipophilicity, light specific gravity, water absorption of 0.01%, insoluble in oil and acid and alkali resistance, etc., and the amount of oil can be up to its own weight of 20 to 50 times the weight of the oil, with fast oil-absorbing speed, oil absorption, can be floated on the surface of the water for a long time without deformation, water and oil replacement performance is good, and can be repeatedly used in the long term storage and so on, by the popularity of this field. It is popular in this field.
Europe and the United States, Japan and other countries have been widely used meltblown oil-absorbing materials for factory equipment oil spill management, marine environmental protection, sewage management and other oil spills and oil pollution control, and have specific regulations, requiring ships and seaports must be configured with a certain number of meltblown oil-absorbing materials to prevent environmental pollution.
China in this regard has attracted widespread attention, some seaports are said to have begun to have some meltblown oil-absorbing flocculent pads, oil-absorbing grates, oil-absorbing tape and other products, in order to prepare for the necessary, and in addition to a number of hotels, and even including the family use of the oil-absorbing products are also gradually being promoted. But for ships and seaports, a certain number of meltblown oil-absorbing materials must be configured to prevent pollution of the environment.
④ Medical and health supplies
The use of meltblown nonwoven fabrics and other materials composite can be produced medical and health supplies, usually meltblown nonwoven fabrics and breathable, moisture permeable film composite, and more commonly used is spunbonded fabrics and meltblown fabrics composite for SMS, SMMS and so on. Spunbond mainly makes the composite cloth with sufficient strength, while meltblown cloth prevents the invasion of blood and dirty liquid with bacteria or virus into the human body, and its composite products can be made into disposable or limited use of protective gowns, surgical gowns, masks, surgical towels, bed sheets, hospital room curtains and so on. These products according to the need for anti-static, anti-alcohol, anti-plasma, water repellant, oil repellant, anti-dirt acid, alkali, flame retardant, ultraviolet and other special treatments. It has also been mentioned meltblown nonwoven fabrics after electropolarization treatment can enhance its barrier, shielding bacteria, viruses, the role of dirty liquid, the use of its composite cloth made of protective products can prevent cross-infection between patients and health care workers, but also to prevent the patient and the health of the people between the infection.
In 2003 SARS epidemic in China, meltblown nonwovens barrier, shielding role is widely recognized, meltblown nonwovens in health care applications are highly valued, promoting the rapid development of meltblown nonwovens, with the development of China's medical and health care, meltblown nonwovens and its composite products in the application of medical and health care will be further developed.
⑤ Industrial and household wipes
Industrial and household wipes is the most rapid development of the market, due to the meltblown nonwoven staining power, soft touch, does not damage the surface to be wiped, and therefore has great prospects for development. Some foreign enterprises use meltblown nonwoven fabrics to make baby wipes, family wipes, personal wipes are very popular, meltblown wipes can also be used for automobile wipes, precision machine tools, precision instruments wipes, and so on.
⑥ lead-acid battery separator
Polypropylene meltblown nonwoven fabric can be used as a lead-acid battery separator after treatment, the annual consumption of our country is about 6000 tons or more. Due to meltblown nonwoven fabric has a small pore size, high pore rate, low resistance, light weight, can be sealed bags, etc., and the material is relatively inexpensive to replace the PVC partition. At present, the meltblown fabrics used for this type of battery separator are mainly produced by intermittent equipment.
⑦ sound insulation products
Meltblown nonwoven fabric can absorb the transmission of sound waves. Therefore, it can be used in automobiles, homes and ultra-quiet room sound insulation materials, such as: computer boxes in cars, high-level audio outer layer, etc. must be used to isolate the meltblown layer, it is claimed that: the application of this area has just begun, there is a great deal of room for development.
Excerpted from: Industrial Textiles Association Forum - Meltblown Nonwovens section
Welcome to exchange.