NEW PRODUCTS Equipment
Trends and Highlights in Filtering Depth Jiltration as opposed to surface Jltration continues lo gain strength. Choice of.filter media is as important as the type of equipment or system selected to do the job. T h e combination of equ$ment and media results in compact, low-cost systems. Continuous filtration systems as opposed to batch systems seem to be more in evidence. This has the eject of reducing unit processing cost through more equipment usage and less process time. And continuous systems have been devised such that more than one type of material can bejltered without extensive change-over of processing procedures or equ$ment. Materials for filter media lean more to the plastics than conventional cloth and metal. As newer plastic materials are introduced, the range of materials for media preparation will grow. And while there will be more selectivity toward types of streams that can be handled, simple changes in equipment design will make at easier to change the media without undue delays in processing. Promising research in Jilters made from Dacron polyester fibers show important characteristics unavailable in conventional filters. These jlters have good resistance to strong acids at room temperatures and most weak acids at boiling temperatures. A relatively low melting point, 480’ F., makes the material practical for heat-sealing.
can range from $15,000 upward, depending on materials of construction, pressure rating, accessories, and automation controls desired. Dept. I E C , T. Shriver ti? Co., Inc., 808 Hamilton St., Harrison, N . J . 202
In-line microfilters New Series C microfilters feature in-line mounting and positive sealing. Filtering elements attach separately to the mounting head, allowing the case to be removed without breaking line connections or disturbing the element. Absolute retention of particles in sizes from 25 microns o r larger down to 0.3 micron is effrcted. Cases of carbon steel, stainless steel, and nickel-plated brass are offered. All cases can be used to 250 p.s.i. Prices range from $30 to $75 for complete assembly. Dept. I E C , Selas Rotronics, Spring House, Pa. 20%
Diatomite Pressure Filter High Capacity Filtering System An all stainless steel, high capacity recirculating and filtering system designed for “white room’’ processes has been introduced. T h e HS-29 filter system comes in two typesstandard for filtering out particles as small as 5 microns and precision for removing particles as small as ‘/z micron. Both units have flow
capacities of 120, 300, 600, and 900 gallons per hour. Flow is controlled by a needle valve. Systems are designed and tested for constant duty. Prices range from $490 to $1025 for standard units and $630 to $1460 for precision units. Dept. I E C , Hektor Scientific Co., Inc., ?2 Gilmore, St., Foxboro, Mass. 20 1
Rotary l e a f Filter
A rotary leaf pressure filter has been designed to overcome a number of shortcomings in other filters of this type. Shortcomings are leakage of the filter elements at several points of the leaf hub area and leaf rim, inadequate mechanical strength of filter element, incomplete drainage of filtrate from the leaf, and incomplete and inefficient sluicing and cake removal. Filters can be built for 100 to 1000 square feet of effective filtering area. Prices
A new Silverstream diatomite pressure filter has been designed for filtering continuous water flow. This inexpensive, compact unit is available in sizes from 1 3 to 250 square feet of filter area per single unit. The shell is built to withstand working pressures up to 100 p.s.i. Head and element plate are removable for internal inspection. Internal surfaces of the shell and all surfaces of the element plate are sand blasted and protected against corrosion with baked-on epoxy resin coating. Prices vary with size of the unit. Dept. I E C , ZnJilco, Inc., Tucson, Ariz. 204 (Continued on page 64)
Prices q u o t e d a r e those submitted They a r e subject to change without notice. Prices a r e f.0.b. p o i n t of manufacture.
by the manufacturer.
VOL. 5 4
NO. 3
MARCH 1962
61
i
improve a wide variety of industrial products and processes Epolene polyolefin resins a r e chemical polymers whose physical properties are intermediate between those of paraffins and plastic-grade polyolefins. Their molecular weights range from 1500 to 10,000. Like waxes, Epolene resins can be melted and blended with many natural and synthetic materials, paraffins, and other resins. Yet, the physical properties of Epolene resins are superior to most waxes-they are tough, flexible, and chemically inert. Epolene resins, singly or in combinations, contribute to improved performance in decorative moisture- and grease-resistant coatings for a variety of paper and paperboard products. They provide maximum toughness and durability in floor polish formulations. Hot-melt adhesive and laminating formulations based on Epolene resins provide strong, quick-setting bonds between such diverse materials as alu-
minum foil; all types of paper; and cellulose acetate, polyethylene, and polyester films. In textile emulsion finishes, Epolene resins improve the tear resistance, hand, and abrasion resistance of fabrics. In these applications and in many other industrial processes and products, Epolene resins provide the means for improved performance and usefulness. As indicated in the Tables, t h e basic types of Epolene resins vary in characteristics as their molecular weights or densities approach those of paraffin o r a plastic-grade material. Some idea may be obtained from these Tables as to which Epolene resin will prove most suitable for your particular product or process. For more detailed information, and for technical assistance in selecting and using Epolene polyolefin resins, write one of the Eastman affiliates listed opposite, or any of their representatives.
,
r
1
I POmNG COILS AND WNDENSERS.CARBON PAPEP OHON WCK CONING * W E D PAPER WR FIBER DRUMS SOR WATING GLASS BORW -LEATHER FINISHES
I
Emulsifiable Epolc wax-like properties
wax-like properties
. .
plastic-like properties
..
. . i w AMP
TYPE
E44
Molecular Weight
Viscosity at 125°C.. cps. (Brookfield1
-
I 1400 I 190
E-11
1500 375
E-12
I
1500 410
E-10
I
TYPE
2500
Molecular Weight
1300
Viscosity at 125"C., cps.(Brookfieldl
> ....
. ......
TYPE
.
E-10
-.
E-12
TYPE
Density
Density
Penetration Hardness (100g./5 sec./77T.1
Penetration Hardness
Tensile Strength, psi
430
510
1300'
conlu~s- m m e s ~-ND(NG
Non-Emulsifiable Epolene Resins
esins
plastic-IiKe properties
. .
PAWTAND VARNISH-PRWTING INKS SMVLSlOU mPSn
TENITE
PARAFFIN N-12
N-11
N-10
C-IO
C-12
C-11
IlOb
I 325 I 1500 11500 12500 13700 I 7000 I 10,000 I 38,000 3
.
..
364
390 1990 9OOc 14,300 >25,000 >100,000
. ..
130- AMP PARAFFIN C-12
0.850
.
..
TENITE C-10
N-11
N-10
N-12
0.897 0.906 0.925 0.927 0.937
(100g.15sec./77"F.l
15
11.5 2.5
2.0
1.5
1.5
Tensile Strength, psi
180
200
730
550
920 brittle'
C-11
3300d
0.947
0.960
