1. Structural formula:
Where n is average polymerization
degree, and the molecuilar weight is 44n.
Appearance: white or cream colored slices or granules.
is a water-soluble resin. The dissolving rate of PVA 17-99 is highly
dependent on dissolving temperatures, that is, the higher the temperature, the
higher the dissolving rate. It good film-forming and adhesive properties
of it's water-solution.
Chemical stability: It is hardly influenced by weak acid, weak base or normal
organic solvents, highly resistant to oil.
softened when heating, stable below 40°C, gradually colored above 160°C after a
long time. Above 220°C begin decompose and generate water, acetate,
Storage stability: good storage stability, no moulding or deterioration.
Vinylon raw materials:
alcohol 17-99 can be processed into vinylon fiber through dissolving, spinning
and treating by aldolactol formaldehyde. Vinylon fiber can be made into
vinylon textile by mixing with cotton. wool, viscose fiber. wich is widely used
in many industrial fields, such as clothes, tarpaulin, curtain thread, fishnet
and rope etc.
Textile warp sizes:
sizes, prepared mainly with polyvinyl alcohol, have good adhesive to cotton,
fiber of hemp, polyester fiber, viscose fiber, etc. The films are smooth, solid
and abrasion resistant, with good tenacious. It can lower the end breaking
rate, with a little dust on wrap sizes and cloths. For the smaller
quantity of the wrap sizes, the cloth have a soft feel and is smoth. Also
the quantity is increased in a bolt of cloth.
(3) Ferric processibg agent:
as ferric processing agent, it is often mixed with urea and formaldehyde. When
heated to a high temperature, irea and formaldehyde react with each other,
leading to softly tenacious while increasing the stiff and smooth properties and
elasticity. The stiff and smooth degree of the cloth can be adjusted by
changing the quantity of the polyvinyl alcohol.
highly adhesive, good film forming and making for tancious film properties, this
product can be used toghether with, or instead of, starches and casein, as
pigment binders for coated papers or used as surface sizes for white paper
boards, oil-resistant paper, printing paper, Kraft and cellophane. This
can increase the wear, folding and tear resistance of the papers or papers
boards, and make them more glossy, smooth, printable and resistant to oils and
product can react through acid catalysis with formaldehyle, acetaldehyde or
butadehyle into polyvivyl alcohol wich can improve the water-proof, adhesion
properties of polyvinyl alcohol. Aldolactol formaldehyle is widely used in
coating, construction adhesion (107 adhesion), sponge, etc. Aldolactol
butadehyle has good ashesion to glass, metal and leather, wich can be used in
fields of coating, aluminum foil, copper board and safeglass etc.
water solution can substitute natural bonding agents (starch, water glass, etc.)
asw adhesives in brookbinding, making paper cartoons, paper ropes, paper tubes,
paper boxes, etc. It can be used toghether with cheap inorganic filters to save
money, such as clay, aluminum oxide, titanium oxide, while to increase adhesive
Polyvinyl alcohol films:
are highly transparent, glossy, highly tensile and of strong tearing strength,
and resistant to oils and organic chemicals; have a high moisture permeability
and gasproofing property; and free from static charge. Therefore, they are
suitable for textile packing. Additionally, it can copolymerize with
polyvinyl, polypropylene, used in instrument packing or optic fields.
practical using, Huabiao brand polyvinyl alcohol 17-99 should be prepared into
solution in most cases.
dissolving container should be a pot with a stirrer. The stirring speed
should be 70-100 r/min. The pot should be iron container with lining of
stainless steel, enamel or copolymer resin.
dissolving add PVA in cold or room temperature water while stirring; continue
stirring for about 20-30 min or more, so that PVA swells amd disperses
sufficiently. (it can be effectively save dissolving time swelling PVA
first). Then raise the temperature to 95°C and hold it for 2.5-3.0 hours,
until it completely dissolved without tiny pellet. After removing the
impurity by filtering, the solution can be used.
steam for direct heating to raise the temperature of the solution, or use the
water bath method for indirect heating in order to avoid decomposition due to
local overheating. When heating by water stream, add water 10-15% less
than usual, due to there will be water condensed in the solution.
may develop if the high density PVA 17-99 solution is agitated vigorously.
Foaming can be controlled by adding to the solution defoaming agent such as
octanol, tributy 1 phosphate or silicon defoamer agents.
Whether or not it is completely dissolved? How to judge?
solution, add 1-2 drops of iodine coulombmeter into it. If there appear a
blue transparent ball, it indicate the PVA 17-99 is not dissolved completely;
otherwhise if the color glossy spreads evenly, it indicates it is dissolved
Package, transportation and storage
Packing: Packed in pp woven bag with plyethylene bag lining, with 20 Kg. net per
Storing: Storage room should be dry and well ventilated. Stirct
moisture-proof measures should be taken.
Transporting: To be handled lighly so as to prevent breaking of package.
the product is flammable, there should absolutely be no open fires in close
vecinity. Can use any firefighting instrument to put out a fire in case of
Hydrolysis PVA's Specification:
||Sodium Acetate %<=