泰科纳 CELCON POM UV270Z 汽车领域的应用

泰科纳 celcon pom uv270z 汽车领域的应用

·        特点：泰科纳celconpom uv270z 是一款含有紫外线稳定剂的聚甲醛(pom)共聚物.特点:抗紫外线性能良好,流动性高.用途:汽车领域的应用,汽车内部零件.

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celconuv270z | pom | uv resistant

description

celcon®uv270z is a nominal 27 melt flow rate acetal copolymer which hasbeen specially stabilized to prevent discoloration anddeterioration of mechanical properties from ultraviolet lightexposure. celcon® uv270z flow is designed to fill small anddifficult to process parts such as speaker grills and otherinterior automotive parts. the material is available in precoloredblack or colors.

otherprocessing

injectionmolding

standardreciprocating screw injection molding machines with a highcompression screw (minimum 3:1 and preferably 4:1) and low backpressure (0.35 mpa/50 psi) are favored. using a low compressionscrew (i.e. general purpose 2:1 compression ratio) can result inunmelted particles and poor melt homogeneity. using a high backpressure to make up for a low compression ratio may lead toexcessive shear heating and deterioration of thematerial.

melttemperature: preferred range 182-199℃ (360-390℉).melt temperature should never exceed 230℃ (450℉).

moldsurface temperature: preferred range 82-93℃ (180-200℉)especially with wall thickness less than 1.5 mm (0.060 in.). mayrequire mold temperature as high as 120℃(250℉)to reproduce mold surface or to assure minimal molded in stress.wall thickness greater than 3mm (1/8 in.) may use a cooler(65℃/150℉)mold surface temperature and wall thickness over 6mm (1/4 in.) mayuse a cold mold surface down to 25℃ (80℉).in general, mold surface temperatures lower than82℃ (180℉)may hinder weld line formation and produce a hazy surface or asurface with flow lines, pits and other included defects that canhinder part performance.

isodata

mechanicalproperties

value

unit

teststandard

phys

density

1410

kg/m³

iso1183

meltvolume rate (mvr)

23

cm³/10min

iso1133

mvrtest temperature

190

℃

mvrtest load

2.16

kg

moldshrinkage - parallel

1.7

%

iso294-4

moldshrinkage - normal

1.6

waterabsorption (23℃-sat)

0.75

iso62

humidityabsorption (23℃/50%rh)

0.2

mech

mechanicalproperties

value

unit

teststandard

tensilemodulus (1mm/min)

2700

mpa

iso527-2/1a

tensilestress at yield (50mm/min)

64

tensilestrain at yield (50mm/min)

8

flexuralmodulus (23℃)

2760

iso178

charpynotched impact strength @ 23℃

4.7

kj/m²

iso179/1ea

notchedimpact strength (izod) @ 23℃

5.1

iso180/1a

therm

thermalproperties

meltingtemperature (10℃/min)

167

iso11357-1,-2,-3

dtul@ 1.8 mpa

90

iso75-1/-2

coeff.oflinear therm. expansion   (parallel)

1.1

e-4/℃

iso11359-2

coeff.oflinear therm. expansion   (normal)

1.2

specprod

testspecimen production

processingconditions acc. iso

9988-2

-

internal

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