The Application of PVA Films Used as Industrial and Agricultural Films
LIWEI CHEMICAL CO. LTD
Agricultural films:
1. Pesticide packaging: High concentrations of pesticide, toxic and many other issues are widespread
problems of pesticide, and it is great harm to human body. Therefore, the pesticide packaging
problem has been more and more get great importance attaches of pesticide department. For a long
time, pesticide packaging has three major shortcomings:
1). Liquid pesticide use glass packaging, the breakage rate of glass bottle is higher then
others.
2). The use of common pesticide packaging bags can easily generate a large number of packaging
residue, and resulting in waste.
3). The abandoned pesticide with a large number of residues bags can be easily discarded in rivers,
streams, fields, and can easily contaminate soil and water.
4). Accumulate over along time period, it will become an invisible killer of poisoning the human and
the environmental pollution. According to statistics, every year, there are about 300 million of
these pesticides packaging waste in our country. About the loss of these pesticide packaging waste
over one hundred tons, and how to timely handle the packaging waste has become a priority in front
of us.
With water soluble polyvinyl alcohol film
packaging pesticides , farmers can conveniently thrown the wrapped pesticides into the field
from the ridge. And when they prepare the agent, as long as the packaged drug is dissolved pesticide
inputs mixing bucket.
2. Seed strips: After crop seed spacing arrangement, use water soluble polyvinyl alcohol film pack
into a strip, maintain its shape and bury it in the soil, make it suitable for germination, thinning
operations can be omitted. Vegetation cloth makes the seeds attached to the Water Soluble Polyvinyl
Alcohol film, and form cloth, to simplify the job lawn.
Industrial films: 1. Printed film: PVA film has excellent water color and
ink printability, which is available only with plastic film with printing ink incomparable
advantages, it can be used for water transfer printing, such as: coloring glass, ceramic, electrical
enclosure and so on. At the same time, Polyvinyl Alcohol film with strong polarity, printing without
electric spark processing. It is widely used in special printing industry, such as water transfer
printing membrane substrate.
2. Embroidery film: PVA film with water soluble property, only need to soak for several minutes,
advance material will be completely dissolved, embroidery patterns can be appeared. The advantages
of the application of water woluble PVA film: non-toxic and fully dissolved, convenient processing,
do not produce glue residue and drawing, and suitable for multi- head embroidery machine, won’t be
broken or partial holes, instead of non-woven fabric material, avoid high temperature deformation
and fiber textile dye fade. And we can use PVA films to replace the paper cloth and reinforced
computer embroidery products quality and incremental value.
3. Clothing packaging film: PVA film has the characteristics of no static, transparency, and luster
is superior to other films. Packaging objects appear more distinct beautify the appearance, and
enhance the value of the goods. Water soluble PVA film with high barrier to the air, used in the
textile packaging, nitrogen energy barrier in the air, avoid the nitrogen to textile yellow. And it
also can absorb carcinogens such as formaldehyde in textiles, in convenient destroyed after using,
so the water soluble PVA film is an ideal material for textile packaging.
4. Water Soluble Health film: It can be used for women’s products, such as: sanitary napkins pad and
so on.
5. Food packaging film: Because PVA has
the
advantages of high barrier property to oxygen, carbon dioxide, nitrogen, hydrogen and so on, it can
prolong the shelf life of foods, cosmetics, tea and keep color and aroma.
6. Medical film: It can contribute to the maintenance of doctors, nurses and other medical staff or
patient, laundry workers health and safety, to avoid cross infection contamination and medical staff
and patients.
7. Grease packing film: Water soluble PVA film has a strong resistance to permeability in animal
oil, vegetable oil, mineral oil, fat and grease or organic solvents, hydrocarbons, can be used for
the packaging of goods.