Beauty Tips for Oily Skin
Oily skin- these two remind us of greasy feeling all over the skin. A skin type that gets worse in summer season and never allows to put makeup. It is noticed that oily skin type suffer from sensitiveness and are prone to frequent break out of pimples. Thus, is there any solution that will help in keeping the oily skin healthy looking? Yes there is. You can fight back with this problem by following beauty tips for oily skin.
Causes of Oily skin
Secretion of sebum, the natural built moisturizer in surplus quantity is considered the main cause of oily skin. The accumulation of sebum contributes in making the skin heavy and greasy. Sometimes, oily skin is caused due to hereditary reasons. But don’t worry there are many skin care products available in market that helps in fighting with oily skin. You can opt for natural and herbal products to tackle oily skin problems. Sometimes as a medicinal side effect oily skin can pose as major skin problem. Thus, choose beauty products wisely and see the difference.
Handy Beauty Tips for Oily Skin
Use water based products: Try to use water based products for cleansing oily skin. The main cause of oily skin is because of surpluses oil. Thus creams and lotions will only contribute in making the problem worse followed by formation of acne and blackhead. During summer, oily skin suffers more, thus it is advisable not to put any makeup. Use only light and water based moisturizer as when required all over the face. To attain natural look use natural color lipstick and kohl to high light your eyes.
Moisturize your face from time to time: People who suffer from oily skin feel that washing the face from time to time will help in effective dealing. But it is advisable not to use soaps. Instead splash your face with plain water as many times as you can. This will prevent accumulating dirt and dust on your skin layer. It also helps in keeping your pore clean and prevents from clogging. Proper hydration keeps the skin happy and healthy. Thus, always try to be happy and stay away from skin problems.
Ensure to remove makeup: If you have applied any makeup, make sure that before you retire to bed you have removed makeup. Makeup closes the pores of skin and thus you must allow them to breathe properly. Remove makeup with good cleansing milk. Even though you don’t use makeup ensure that, you must clean your face throughly before you retire to bed. This will also prevent the formation of acne.
Use astringent: The cleansing and exfoliating process must be followed immediately by application of astringent. Astringent ensures that enlarged pores are closed to prevent the pollution and dust from entering and clog them to contribute more.
Follow proper beauty care regime: This is one of the best beauty tips for oily skin that helps in providing you a healthy look. With disciplined lifestyle and proper skin care, you will definitely improve your skin texture to have a better look.
Skin-Care
The outstanding mechanical properties of an en-
gineering liquid crystalline polymer (LCP) can be
attributed to the self-reinforcement effect due to its
rigid rod-like molecular structure [1-4]. High
strength and high stiffness liquid crystalline polymer
fibres, e.g. Kevlar and Vectran have been developed
and commercialized [5, 6]. Recently there has been
increasing interest in blending thermotropic liquid
crystalline polymers with conventional isotropic
polymers. Liquid crystalline polymer fibre reinforce-
ment can be formed in situ in an isotropic polymer
matrix via a melt blending process [7-26].
The
structure and morphology of the in situ composites
may be controlled by varying the processing
conditions and theological history of the blends.
Blends of LCPs with conventional polyesters [7, 8],
nylon [9], polycarbonate [10-13], polystyrene
[11, 14], polypropylene [15, 16], polysulphone [17],
poly[ether imide] [18] and poly[phenylene sulphide]
[19] have been studied. For extrusion-blended
materials, the structure and mechanical properties
were found to be closely related to the extrusion
conditions, in particular the draw-down ratio. Most
researchers have attempted to explain the changes in
mechanical properties in terms of the morphology of
the LCP phase in the blends, with the most widely
used techniques to study the morphology being
scanning electron microscopy (SEM) and X-ray
diffraction (XRD) [7, 12].
Transmission electron microscopy (TEM) has been
widely used to study the crystalline structure of
liquid crystalline fibres [4, 6, 20, 21] and the mor-
phology of multiphase polymer systems [22]. Analy-
sis has revealed detailed information on the
crystalline structure of aramid and thermotropic
liquid crystalline polyester fibres and the develop-
ment of skin-core morphology of such fibres [4, 21 ].
These findings were related to the properties and
sample processing conditions.
The work reported in this letter is concerned with
the application of the TEM technique to the analysis
of blends of a liquid crystalline polymer and
polycarbonate. The microstructure and morphology
0261-8028 © 1996 Chapman & Hall
of the blends, in particular the development of in
situ LCP fibrils in the polycarbonate matrix during
melt extrusion, was examined. TEM analyses have
indicated that there is a differentiation in the fibril
morphology at the skin and core region of the
extrudates. It is understood that these fibrils are
ultimately responsible for the reinforcement effects
in such in situ composites. Hence the molecular
ordering and geometric morphology of these fibrils
affect significantly the mechanical properties, such
as the strength and stiffness of the blends.
The blending of a main chain thermotropic liquid
crystalline polymer (Vectra B950, Hoechst Celanese)
and a bisphenol-A polycarbonate (Lexan 151,
General Electric) was carried out using a co-rotating
twin screw extruder, the processing details having
been described elsewhere [12]. Blends of two
different compositions (10wt% and 30wt% of
LCP in polycarbonate) were prepared in the present
study and the draw-down ratio was kept constant at
about 12. The extrudates obtained, typically about
1 mm in diameter, were embedded in a cold-curing
Spur resin of suitable hardness. Ultra-thin sections
(thickness <100 nm) of the blends were cut using a
diamond knife on a Reichert Jung Ultracut-E
ultramicrotome. The cutting was carried out long-
itudinally perpendicular to the direction of drawing
with ultra-thin sections from both the outer skin and
the inner core region being prepared
.
The ultra-thin samples of these blends were
examined using a 200kV Hitachi 8100 STEM
operated under TEM mode. A low electron beam
dose was used to avoid beam damage on the
polymers. Bright field images of the in situ
composites were obtained without any staining
processes. Selected area diffraction patterns were
obtained from areas of 500 run in diameter.
Fig. 1 shows the TEM bright field images obtained
from a blend containing 10wt% LCP. TEM
micrographs were taken of the ultra-thin samples
sectioned from the skin and the core regions of the
extrudate. A distinct two-phase structure was ob-
served in the blend with the LCP phase dispersed
