Prix FOB
Obtenir le dernier prix17.5 ~ 26.5 / Kilogram
|50 Kilogram Minimum Order
Pays:
China
N ° de modèle:
OB-1
Prix FOB:
17.5 ~ 26.5 / Kilogram Obtenir le dernier prix
Localité:
-
Prix de commande minimale:
17.5 per Kilogram
Commande minimale:
50 Kilogram
Packaging Detail:
25kg / fiber drum with PE liner
Heure de livraison:
within 15-20 days after receiving your deposit or
Capacité de Fournir:
500 Metric Ton per Year
Payment Type:
Western Union, L/C, T/T
Groupe de produits :
-
Personne àcontacter li
rongye, Tianjin, Tianjin
Optical Brightening Agent
OB*1
Performance:
Optical brighteners are added to many materials to reduce
yellowing, improve whiteness, and
to enhance the brightness of a product. OB*1 is used widely in the
plastic market. Because of
its excellent brightening ability, good thermal stability, and
compatibility with many polymers.
Typical Properties:
Chemical name: 2,*-(1,*-Ethenediyldi*4, *-phenylene)
bisbenzoxazole
Molecular weight: **4.4
CAS No.: ********5
C.I.: **3
Specifications:
Ash %: 0.3max
Empirical Formula: C*8H*8N2O2
Melting Point(DTA),C: ******9
Appearance: Yellowish Green Powder
Odor: Free of odor
Volatile Content %: 0.3max
Assay %: *9min
Particle Size: **0 meshes
Effect of Optical Brighteners on the Whiteness of Polymers:
Optical brighteners function by absorbing ultraviolet radiation and
remitting blue light. The
emitted blue light will reduce the yellow color of a polymer. In
the presence of a whitening
agent, such as TiO2, the use of OB*1 will produce a brilliant white
or white than white
appearance.
Two primary factors affect the whiteness/yellowness of a
formulation. They are the color of the
base polymer and the level of brightener added. If no whitening
agent, such as TiO2, is used,
the level of OB*1 required will likely be lower than when a
whitening agent is preset. This level
might be as little as ****0 ppm. In determining the optimum
concentration of brightener, the
effect of any other UV-absorbing materials in the plastic should be
considered. It is important
that users perform sufficient evaluations to determine the optimum
level of OB*1 for their
specific end uses.
Methods
of Addition:
To be effective, an optical brightener must dissolve in the polymer
to which it is added. Since
the typical addition levels for OB*1 in the range of ******0 ppm,
the use of a concentrate, or
masterbatch, is recommended. Concentrates are containing 1%**0% by
weight of OB*1
typical.
The concentrate can be produced on an extruder using normal
processing conditions for the
polymer, including drying if necessary. The concentrate is then let
down to typical use levels in
the final formulation. Plastics compounding equipment is normally
adequate for producing
OB*1 brightener formulations. The key requirement is to thoroughly
disperse the brightener so
that it will dissolve uniformly throughout the molten polymer. This
is usually achieved most
readily with a concentrate.
Improving Whiteness of Recycled Polymer:
The business of processing post consumer plastics and waste polymer
continue to grow.
These materials can be recycled into a variety of useful products,
from plastic lumber to
synthetic fiber. Polyester bottle polymer, polyester plastic waste,
and waste fiber polymer can
be recycled into polyester fiber that can be used in carpets,
filling and insulation material,
nonwovens, and apparel. One of the shortcomings of processing these
materials is the
uncertainty of the color of the source material.
By using optical brighteners, the value of the recycled materials
can be significantly enhanced
by providing a more uniform white. OB*1 will greatly improve the
whiteness, Normal fiber
applications require only ******0 ppm in new polymer, but recycled
material may require as
much as ******0 ppm. Optical brighteners are very effective in
improving the appearance of
the polymer or fiber. Off-class or second-quality nylon polymer can
also be improved in the
same way.
Food Industry Applicable:
OB*1 complies with regulations for indirect food additives. OB*1 is
restricted to use as an
optical brightener for all polymers at a level not to exceed 0.**5%
by weight of polymer and at
the temperatures not to exceed **5"C(**5"F).
Packing:
*5kg / fiber drum with PE liner
Size of drum: Height: *1cm Diameter: *2cm
| Pays: | China |
| N ° de modèle: | OB-1 |
| Prix FOB: | 17.5 ~ 26.5 / Kilogram Obtenir le dernier prix |
| Localité: | - |
| Prix de commande minimale: | 17.5 per Kilogram |
| Commande minimale: | 50 Kilogram |
| Packaging Detail: | 25kg / fiber drum with PE liner |
| Heure de livraison: | within 15-20 days after receiving your deposit or |
| Capacité de Fournir: | 500 Metric Ton per Year |
| Payment Type: | Western Union, L/C, T/T |
| Groupe de produits : | - |
