Full name Polyvinylchlorid, the main ingredients
of , bright color,
corrosion resistance, durability, due to an increase in the
manufacturing process of plasticizer, anti-aging agent toxic
support material to enhance its heat resistance, toughness,
ductility and so on, so the products generally do not store food
and medicine. pvc foil is loved the world today, is quite popular
and also widely used as a synthetic material. Its global use of
synthetic materials in various ranks second. According to
statistics, only the year 1995, production in Europe will
have about 5 million tons, while its consumption was 5.3 million
tons. In Germany, PVC production and consumption of an average of
1.4 million tons. pvc foil is the growth rate of 4% worldwide by
production and application. growth in Southeast Asia
in recent years, several particularly significant, thanks to the
Southeast Asian countries have carried out the urgent needs of
infrastructure construction. Three-dimensional surface film can be
produced in the material, PVC is the most suitable material.
Rigidity pvc foil is the most
widely used plastic materials. PVC is actually a vinyl polymer
material, the material is a non-crystalline materials. PVC
materials are often added in the actual use of stabilizers,
lubricants, auxiliary processing agents, pigments, impact agents
and other additives. Is not easily flammable, high strength,
resistance to climate variability and excellent geometric
stability. on the
oxidant, reductant and acid have a strong resistance. However, it
can be concentrated oxidizing acid such as sulfuric acid,
concentrated nitric acid is corrosive and does not apply and
aromatic hydrocarbons, chlorinated hydrocarbon exposure
occasions.
pvc foil melting temperature in
the processing time is a very important process parameters, if this
parameter incorrectly will result in material decomposition. The
flow characteristics of PVC very poor, very narrow scope of its
technology. In particular, high molecular weight PVC material more
difficult to process (this material is usually added to improve the
flow characteristics of lubricants), so commonly used are small
molecular weight PVC material. pvc foil shrinkage rate is very low,
generally 0.2 to 0.6%.
Flow channel and the gate: all
the conventional gate can be used. If the processing of smaller
components, the best use of needle-type gate or submerged gates;
for thicker parts, it is best to use fan-shaped gate. Needle-type
gate or submerged gate minimum diameter should be 1mm; fan gate
thickness not less than 1mm.
Typical use: PVC with rich raw
materials (oil, limestone, coke, salt and natural gas),
manufacturing processes mature, low cost, wide range of uses such
prominent features, which has become the world"s second largest
behind General polyethylene resin resin.
