|
选择滤材时要考虑的三个重点分别是期望达到的过滤效率，滤材的容尘量和过滤对气压的要求。末级过滤器滤材的选择取决于多种因素，如过滤器的设计，灰尘数量，粒子大小，空气流速，气流压力，期望达到的过滤效率以及允许的压降等等。我们的技术与研发部门在滤材的选择，以及针对特定的过滤效率来设计生产滤材等方面经验相当丰富。
Hollingsworth & Vose's meltblown synthetic media are designed
to have lower pressure restrictions for a given performance over
other similar products. The advantages of our meltblown filter media
are typically evident with the need
for higher efficiency with reduced back pressure.
This table lists typical markets and applications for H&V products,
which are characterized by high efficiency and reduced back pressure.
So we can effectively meet your requirements, it iimportant to
be specific as to a beta ratio or efficiency at specific particle
sizes. The table below relates beta ratio to efficiency.
效率（%）= （βX - 1）/βX 100 （Where βequals the desired beta value for
particle sizeX ）
| ßx （Beta 值） |
效 率（%） |
| 1.0 |
0 |
| 1.5 |
33 |
| 2.0 |
50 |
| 20.0 |
95 |
| 50.0 |
98 |
| 75 |
98.70 |
| 100 |
99.00 |
| 200 |
99.50 |
| 1000 |
99.90 |
| 10000 |
99.99 |
Beta 值50和100是液体过滤中最常用的效率值。Beta 值200和1000经常被用于食物，饮料及饮用水的微生物污染过滤。这些常用Beta
值只是根据众多不同的过滤器设计而估计的数值。不同的用户为使其过滤器达到设计效率也许会要求滤材具有更高或较低效率。
特定的稳定性和相容性要根据溶剂的强度，温度，接触时间, 使用的胶料等等因素决定。H&V公司的工程师们会非常愉快的与您合作，提供溶剂适应性的详细数据，或者帮助您设计产品以达到特定的要求。
The chart below is designed to provide filter manufacturers and
end users with general guidelines as to how various fibers are affected
by exposure to broad chemical families. Specific chemical resistance
and compatibility will be dependent on solvent strength, temperature,
duration of exposure, etc.
The R&D engineers at Hollingsworth and Vose will be happy to
work with you to provide more specific solvent compatibility detail
or to help design a product to meet your specific needs.
| 化学药品种类 |
Polypropylene |
Polyester |
PPS |
玻纤 |
Cellulose |
| 脂族烃 |
MD |
ND |
ND |
ND |
ND |
| 芳(香)烃 |
MD |
MD |
ND |
ND |
ND |
| 醚 |
MD |
ND |
ND |
ND |
ND |
| 羧酸脂 |
ID / NR |
ND |
ND |
ND |
ND |
| 磷酸脂 |
MD |
ID / NR |
ND |
ND |
ND |
| 弱碱 |
ND |
ID / NR |
ND |
ID / NR |
ID / NR |
| 强碱 |
ND |
ID / NR |
ND |
ID / NR |
ID / NR |
| 弱酸 |
ND |
ID / NR |
ND |
MD |
ID / NR |
| 强酸 |
ND |
MD |
ND |
MD |
ID / NR |
| 氢氟酸 |
ND |
MD |
ND |
ID / NR |
ID / NR |
| 海水 |
ND |
ND |
ND |
MD |
MD |
| 自来水 |
ND |
ND |
ND |
MD |
MD |
ND - 无损害
MD - 轻微损害
ID/NR - 立即损害/建议不要使用
NA - Data Not Available
The chemical resistance data set forth above is intended solely
as a general guideline for customers of Hollingsworth & Vose
Company when selecting fiber composition. Specific solvent resistance
will be dependent on solvent strength, temperature, and duration
of exposure, among other factors. In addition, the use of binders
or other chemicals in web bonding may affect the chemical resistance
properties set forth above.
Testing and approval of media by the customer in specific solvents
under actual exposure conditions is strongly recommended to determine
chemical resistance in a particular application.
top
|
