Plastic applications
We specialize in precision injection mould
design, manufacture and precision injection molding.
Tidy on plastic materials based on many
years of work experience in the practical application of experience:
One feature 1, definitions of commonly used
plastics materials: plastic plastic is a synthetic or natural polymers as the
main constituent of substances usually contain additives such as secondary
ingredients, broadly speaking, he is a certain temperature and pressure could
create a certain shape of plastic polymer organic material. Published in 1996,
the new national standard (GB/t 2035-1996) plastics redefined as: polymers as
the main ingredient, and at some stages of processing into finished products
can flow molding materials.
2, the composition of the plastics:
Plastics is the main ingredient of synthetic resin, coupled with some additives
and fill material.
A,----of synthetic resins and synthetic
organic macromolecular compound, its structural unit mainly consists of carbon,
hydrogen, oxygen atoms and others such as sulfur atoms and silicon atoms by
chemical bonds, and other connections. -----B, fill materials with glass fiber,
carbon fiber, calcium carbonate (CaCO3), silicon dioxide (SiO2), cotton cloth,
metal, wood flour, asbestos, mica and stone powder.
C, additive---------common plasticizers,
stabilizers, lubricants, colorants, antistatic agent, flame retardant,
UV-resistant agent and so on.
3, in General, plastic materials can be
divided into two categories: "thermoplastic plastics" (Thermoplastic)
and "thermosetting plastic" (Thermosetting). Thermoplastic plastic at
room temperature, typically a granular, heated to molten state after a certain
temperature, cooling it after curing, if heated it becomes molten state again,
and again in plastic molding. Therefore, the thermoplastic plastic melt
repeatedly by heating curing, Thermo-plastic plastic waste can often be
recycled so, that is, a so-called "secondary". In contrast, thermoset
plastic is heated to a certain temperature curing, even continuing heated
cannot change its status. Therefore, the thermosetting plastics cannot
repeatedly by reheating, thermosetting plastic waste is often not recycled.
II, plastic by application of range also
may is divided into general plastic, and engineering plastic, and special
plastic; General plastic common of has: PP, and PVC, and PE, and PS, and,;
engineering plastic common of has: ABS, and PC, and PMMA, and POM, and PA6, and
PA66, and PET, and PBT, and SAN,; special plastic common of has: PPS, and PEI,;
engineering plastic often by some general plastic modified sexual are; as
changed some molecular structure, and added other components as glass fiber,Project
is to be used as industrial parts or shell material of plastic for industrial
use, its strength, impact resistance, heat resistance, hardness and resistance
to aging of plastic.
Its features include: a, thermal properties
of glass transition temperature (Tg) and melting point (Tm) and high heat
distortion temperature (HDT) high, the long-term use of high temperature
(UL-746B), using small temperature range, thermal expansion coefficient.
B, mechanical properties: high strength,
modulus, low latent degeneration, high mechanical resistance to wear and
fatigue.
C other:, excellent chemical resistance,
fire resistance, electric resistance, dimensional stability and excellent
weather resistance.
Practical application of the common plastic
materials 1, ABS material: most commonly used plastic material, many household
electrical appliances shell are made of it. With high mechanical strength, heat
resistance, chemical resistance and high gloss. Common are Taiwan Chi Mei, and
country Joe of ABS. Chimei: ABS PA757 general purpose grade, good gloss; ABS
PA727 plating grade ABS PA777D heat resistance level.ABS usually heat
denaturation temperature of not more than 88 degrees centigrade.
Its features include: a, thermal properties
of glass transition temperature (Tg) and melting point (Tm) and high heat
distortion temperature (HDT) high, the long-term use of high temperature
(UL-746B), using small temperature range, thermal expansion coefficient.
B, mechanical properties: high strength,
modulus, low latent degeneration, high mechanical resistance to wear and
fatigue.
C other:, excellent chemical resistance,
fire resistance, electric resistance, dimensional stability and excellent
weather resistance.
Practical application of the common plastic
materials 1, ABS material: most commonly used plastic material, many household
electrical appliances shell are made of it. With high mechanical strength, heat
resistance, chemical resistance and high gloss. Common are Taiwan Chi Mei, and
country Joe of ABS. Chimei: ABS PA757 general purpose grade, good gloss; ABS
PA727 plating grade ABS PA777D heat resistance level.
ABS usually heat denaturation temperature
of not more than 88 degrees centigrade.
3, nylon PA6, PA66. Polyamide (Nylon)
maximum advantage of toughness, excellent fatigue resistance, low coefficient
of friction. Often used to make fibers, toothbrush, shredded fish, bushings,
packaging film, gears, electric tools, shell, electrical parts, and so on. But
the biggest drawback is absorbent, absorbent falling sharply increase its
tensile strength. Such as adding a glass fibre can greatly improve its
heat-resistance, that is, PA66+GF15%, PA66+GF30% temperature resistance up to
180~210℃. Therefore, there is no plus glass fiber nylon shall not be used
for parts with high temperature requirements.
Plastic beer come out as soon as possible
after use to avoid placing takes too long to make adverse changes have taken
place after water absorption nylon.
Experience only, hope to give you help!For
more information,please go to www.chinamoldmaker.org www.plastic-injectionmoulding.com
