Compatible Base Materials

Polymer Spheres compatibility with a wide variety of base materials and applications is one of its strengths. Expansion can be done in binders and fibrous materials and yield a homogeneous closed cell structure that’s lower in VOC’s compared to chemical blowing agents. Density of the material drops dramatically from 1.1g/cm to less than 0.02g/cm and because they are encapsulated there is no thermal discoloration (yellowing).

The materials below include familiar names to most people. But what many people don’t know is that Kureha Polymer Microspheres can be combined with these base materials to create unique new materials. Products that allow customers to differentiate in crowded market spaces. Expandable microspheres are one of the most cost effective tools today for precision lightweighting.

PVC Polyvinyl Chloride

PVC is the most widely used member of the vinyl family. It is used in shoe soles, roofing materials and pipe fittings. PVC offers excellent corrosion and weather resistance. It has a high strength-to-weight ratio and is a good electrical and thermal insulator.

pvc

PVC Polyvinyl chloride grade names

Primex® Vinnolit
Formolon® Inovyn™

General Temperature Use Range

Up to 80⁰C

Processing Temperature Range

150-200⁰C

Kureha Microspheres Grade

H850

epdm

EPDM

A copolymer and terapolymer combination of ethylene and propylene (EPR), combined with a third comonomer adiene (EPDM), Ethylene Propylene has gained wide seal industry acceptance for its excellent ozone and chemical resistance characteristics.

EPDM Grade Names

Dutral ® Keltan ® Vistalon ®
Buna EP ® Nordel®

General Temperature Use Range

-54 TO 150⁰C

Processing Temperature Range

170-190⁰C

Kureha Microspheres Grade

H750, H850

FKM

FKM 80% of fluoroelastomers with a vinylidene monomer provide added heat and chemical resistance over other elastomers such as nitril and neoprene, but are also more expensive. There are various FKM grades that differ in composition such as fluorine content.

fkm

FKM Grade Names

Viton® Tecnoflon® Dyneon®

General Temperature Use Range

-40 to 225⁰C

Processing Temperature Range

160-200⁰C

Kureha Microspheres Grade

S1940, S2340

peba

PEBA

PEBA (Polyether block amide) is a high performance thermoplastic elastomer that’s used widely in sporting goods for its flexibility and energy return.

PEBA Grade Name

Pebax® Vestamid®

General Temperature Use Range

Up to 110⁰C

Processing Temperature Range

190-200⁰C

Kureha Microspheres Grade

S1940, S2340

EVA

EVA copolymer which is based on a medium proportion of VA (approximately 4 to 30%) is referred to as thermoplastic ethylene-vinyl acetate copolymer and is a thermoplastic elastomer material. It is not vulcanized but has some of the properties of a rubber or of plasticized polyvinyl chloride particularly at the higher end of the range. Both filled and unfilled EVA materials have good low temperature properties and are tough. The materials with approximately 11% VA are used as hot melt adhesives.

eva

EVA Grade Names

Elvax® Escorene™ Ateva® Acryft®
NUS® Evaflex® Excellen®

General Temperature Use Range

Up to 70⁰C

Processing Temperature Range

150-220⁰C

Kureha Microspheres Grade

H750, H850

TPU Polyurethane

There are two primary types of TPU, which type depends on the type of abrasion resistance and resistance to other chemicals the application requires. Polyether for impingement or Polyester for friction or sliding applications. TPU is a multi-phase block copolymer with high tensile strength that exhibits strong resistance to oil, grease and solvents.

tpu

TPU Polyurethane Grade Names

Viton® Tecnoflon® Dyneon®

General Temperature Use Range

60-170⁰C Depending on Grade

Processing Temperature Range

190-220⁰C

Kureha Microspheres Grade

S1940, S2340, H850

nitrile-nbr-nir

Nitrile (NBR, NIR)

From the Nitrile family is a synthetic rubber copolymer which has good resistance to oil and other hydrocarbons.

Nitrile NBR, NIR Grade Names

Nipol® Krynac® Perbunan®

General Temperature Use Range

-40 to 121⁰C

Processing Temperature Range

190-220⁰C

Kureha Microspheres Grade

M330, M430

PE Polyethylene

Polyethylene’s is a semi-crystalline thermoplastic polyester based on polyethylene terephthalate material. PET is ductile and has low moisture absorption and good abrasion resistance. Varying grades of Polyethylene are determined by their polymer chain length.

pe

PE Polyethylene Grade Names

ERTALYTE® HITECH®Tecapet®

General Temperature Use Range

Up to 70-82⁰C

Processing Temperature Range

200-230⁰C

Kureha Microspheres Grade

S1940, S2340

pp

PP Polypropylene

Polypropylene has strong physical, chemical and mechanical properties and provides excellent resistance to organic solvents, degreasing agents and electrolytic attack. It has excellent resistance to acids and alkaline, but poor resistance to aromatic, aliphatic and chlorinated solvents.

PP Polypropylene Grade Names

Adstif™ SABIC® PP ExxonMobil™ PP

General Temperature Use Range

100-130⁰C

Processing Temperature Range

220-230⁰C

Kureha Microspheres Grade

S1940, S2340

ABS

ABS is derived from acrylonitrile, butadiene, and styrene. The most important mechanical properties of ABS are impact resistance and toughness.

abs

ABS Grade Names

Styrac-ABS, Zeon Compound, Toyolac™

General Temperature Use Range

Up to 105⁰C

Processing Temperature Range

190-260⁰C

Kureha Microspheres Grade

S1940, S2340

tpv

TPV

Thermoplastic vulcanizates exhibits both vulcanized rubber and thermoplastic properties. It’s an EPDM and Polypropylene matrix that are known for their weatherability, chemical and ozone resistance.

TPV Grade Names

Santoprene™ Garaflex® Milastomer™ Excelink®

General Temperature Use Range

-30 TO 160⁰C

Processing Temperature Range

200-220⁰C

Kureha Microspheres Grade

S1940, S2340

HNBR

Hydrogenated Nitrile HNBR is a high tensile strength elastomer. HNBR maintains its modulus at higher temperatures and depending on Acrylonitrile (CAN) percentage it exhibits excellent resistance to hydrocarbons.

hnbr

HNBR Grade Names

Zetpol® Therban®

General Temperature Use Range

-30 TO 170⁰C

Processing Temperature Range

190-220⁰C

Kureha Microspheres Grade

H850, H750

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