Polyvinyl Alcohol PVOH Water Soluble
ANHUI LIWEI CHEMICAL CO.,LIMITED
PVOH water-soluble films are a type of film material primarily made from polyvinyl alcohol (PVA), which is characterized by its good water solubility. These films are nontoxic, colorless, and odorless. They can dissolve quickly in water to form a homogeneous aqueous solution without leaving residues or generating harmful substances, thus meeting the requirements of environmental protection and green packaging. These films are mainly used for specific unit dose packaging of detergents, agrochemicals, water treatment chemicals, food ingredients, pharmaceuticals, and dyes.
Pesticide and fertilizer packaging: PVOH
water-soluble films can be used as
packaging materials
for
pesticides and fertilizers. These films
can protect the product's stability during
transport and
storage,
and they can also be quickly dissolved in
water after use to reduce environmental
pollution, in
line with
the requirements of green environmental
protection.
Packaging for toiletries: These are widely
used in the packaging of products in the
toiletries
industry,
such as washing powder, detergent,
shampoo, etc. They can be directly
dissolved in water without
the need
for additional packaging removal,
providing consumers with a convenient use
experience and
making
housework easier, cleaner, and
safer.
Food Packaging and Processing: PVOH
water-soluble films are also used in the
food industry for
packaging
such as candy, chocolate, and powdered
foods. Their excellent barrier properties
protect the
quality and
taste of food products, while the
solubility of the films provides an
environmentally friendly
solution.
Pharmaceutical & Medical: In the
pharmaceutical sector, PVOH water-soluble
films are used as
drug
coatings, slow-release films, and
packaging for medical supplies. By
controlling the dissolution
rate of
the film, a timed release of the drug can
be achieved, improving the efficacy of the
drug.
Industrial applications: PVOH
water-soluble films also play an important
role in the industrial
field,
such as being used as additives for
coatings, inks, glues, etc., to improve
their performance
and
stability.
The production of PVOH water-soluble film
is mainly based on polyvinyl alcohol
(PVOH) as the main
raw
material, with the addition of other
auxiliary materials such as reinforcing
agents,
plasticizers,
emulsifiers, and film release agents. The
production steps are as follows:
Preparation of raw materials: First,
prepare the required polyvinyl alcohol
(PVOH) and other
auxiliary
materials such as reinforcing agent,
plasticizer, emulsifier, and film release
agent. The
specific
proportion of the formula can be adjusted
according to the properties of the desired
film, such
as the
concentration of polyvinyl alcohol, the
content of soluble starch, glycerol, Tween
80, and
silicone oil.
Dissolving and mixing: Mix the polyvinyl
alcohol and other auxiliary materials in a
certain
proportion,
and add an appropriate amount of solvent
to make them fully dissolved and mixed. In
this
process,
attention needs to be paid to controlling
the temperature, stirring speed, and other
parameters
to ensure
the homogeneous mixing of raw
materials.
Coating and casting: The mixed solution is
evenly coated on the steel plate or other
suitable
substrate
for casting operation. The thickness and
speed of casting can be adjusted according
to the
desired film
thickness and properties.
Drying and Curing: After cast coating, the
film is dried and cured. This step usually
needs to
be carried
out at a certain temperature, e.g., 80 to
90°C, for a certain period, e.g., 20
minutes, to
ensure that the
film is completely dry and cured.
Unwinding and Rolling: After the film has
dried and cured, it can be removed from
the substrate
and
subjected to a rolling operation. The
rolled film can then be cut, packaged, and
processed as
required.
Packaging: Sealed packaging using moisture,
dust and UV resistant packaging
materials
Storage: It
should be stored in a dry, cool and
well-ventilated place, avoiding direct
sunlight and high
temperature.
Yes, PVOH water-soluble film is a type of
plastic. It is a new, environmentally
friendly
packaging material
made from high polymers with water-soluble
properties. This film is
non-toxic,non-polluting, and
can be
completely biodegraded into water and
carbon dioxide (CO2) in nature.
PVOH water-soluble film is unique in that
it dissolves quickly when exposed to
water, making it
ideal for
packaging applications that require easy
disposal or where environmental impact is
a concern.
However, while
it is biodegradable, proper disposal and
handling are still crucial to maximizing
its
environmental
benefits.
