Good Quality Eps Raw Material - STMMA – Xiongye

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Good Quality Eps Raw Material - STMMA – Xiongye Detail:

STMMA copolymer beads are copolymers of styrene and methyl methacrylate with a carbon content of 69.6%. Compared with EPS, the carbon content is greatly reduced, and because STMMA contains oxygen atoms, oxygen atoms can be combined with carbon atoms, thereby further reducing the residual carbon
STMMA raw materials are mainly used in the production of castings such as valves, pipe fittings, auto parts and various mechanical parts.
STMMA series expandable copolymer resin beads have better casting properties than EPS:
Reduce the carbon defects of castings;
Reduce the surface carbon defects of steel castings;
Reduced soot;
Improve the surface finish of castings.
The EPS pattern has large shrinkage and poor dimensional stability. The STMMA pattern has low shrinkage and good dimensional stability.
EPS is mainly composed of chain links containing benzene ring, which not only has high carbon content, but also has good thermal stability of benzene ring. At high temperature (>900°C) and hypoxia, a tar-like viscous liquid is first generated, which is then cracked into carbon and hydrogen. The composition of STMMA is mainly composed of acrylate-based chains, which are zipper-type decomposition at high temperatures, and low The molecular liquid and gas are extracted through the coating and the flask, and the composition contains two oxygen atoms to take away two carbons, which further reduces the source of carbon. This is why the STMMA model material is used, and the castings are not easy to generate carbon defects and steel. The main theoretical basis for the low carbon addition on the surface of the casting and good surface finish.
Main specifications of technical performances of product:
STMMA
Main specifications of technical performances of product:
STMMA

Item

Index

Appearance

Opaque spherical granule

Range of particle size, μm

200 ~ 800

Content of volatile %

≥7.0

Content of moisture %

≤ 0.6

Main applications Suitable for casting of aluminum, copper alloy, grey iron, nodular iron, alloy steel, mild steel and stainless steel.

Name

unit

EPS

STMMA

Molecule

-(C8H8)n-(C8H8O2)m-

-(C8H8O2)-m

Carbon

%

92

60

Crumble

j/g.k

-912

-842

Tg

80-100

100-105

Evaporation(start)

270-300

250-260

Evaporation(end)

460-500

420-430

Storage method of STMMA beads:
STMMA requires low-temperature refrigeration (≤10°C). For customers who do not have this condition, please store in a dry, ventilated, cool place without direct sunlight. When it is not used up after opening, remember to re-tighten the bag and cover the bucket to prevent the loss of pentane. It is best to place the beads in a designated location, and pay attention to fire prevention in the place where the beads are stored.


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Our staff through skilled training. Skilled skilled knowledge, potent sense of company, to satisfy the provider requirements of consumers for Good Quality Eps Raw Material - STMMA – Xiongye , The product will supply to all over the world, such as: Puerto Rico, Thailand, Ecuador, We've got constructed strong and long co-operation relationship with an enormous quantity of companies within this business overseas. Immediate and specialist after-sale service supplied by our consultant group has happy our buyers. In depth Info and parameters from the merchandise will probably be sent to you for any thorough acknowledge. Free samples may be delivered and company check out to our corporation. n Portugal for negotiation is constantly welcome. Hope to get inquiries type you and construct a long-term co-operation partnership.
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