PA12 EMS LV-5H 总代理商

PA12

PROPERTIES

Mechanical Properties

Standard Unit State

Grilamid LV-5H

natural

Tensile E-Modulus 1 mm/min ISO 527 MPa cond. 11500

Tensile strength at break 5 mm/min ISO 527 MPa cond. 160

Elongation at break 5 mm/min ISO 527 % cond. 5

Impact strength Charpy, 23°C ISO 179/1eU kJ/m² cond. 80

Impact strength Charpy, -30°C ISO 179/1eU kJ/m² cond. 80

Notched impact strength Charpy, 23°C ISO 179/1eA kJ/m² cond. 20

Notched impact strength Charpy, -30°C ISO 179/1eA kJ/m² cond. 15

Shore hardness D ISO 868 - cond. 82

Thermal Properties

Melting point DSC ISO 11357 °C dry 178

Heat deflection temperature HDT/A 1.80 MPa ISO 75 °C dry 165

Heat deflection temperature HDT/C 8.00 MPa ISO 75 °C dry 125

Thermal expansion coefficient long. 23-55°C ISO 11359 10 -4 /K dry 0.15

Thermal expansion coefficient trans. 23-55°C ISO 11359 10 -4 /K dry 1.20

Maximum usage temperature long term ISO 2578 °C dry 90 - 120

Maximum usage temperature short term ISO 2578 °C dry 150

Electrical Properties

Dielectric strength IEC 60243-1 kV/mm cond. 35

Comparative tracking index CTI IEC 60112 - cond. 600

Specific volume resistivity IEC 60093 Ω · m cond. 10 11

Specific surface resistivity IEC 60093 Ω cond. 10 12

General Properties

Density ISO 1183 g/cm³ dry 1.47

Flammability (UL94) 0.8 mm ISO 1210 rating - HB

Water absorption 23°C/sat. ISO 62 % - 0.8

Moisture absorption 23°C/50% r.h. ISO 62 % - 0.4

Linear mould shrinkage long. ISO 294 % dry 0.10

Linear mould shrinkage trans. ISO 294 % dry 0.50

Product-nomenclature acc. ISO 1874: PA12, MHR, 18-120, GF50

3

T ECHNICAL  D ATA  S HEET

G RILAMID  LV-5H

Product description

Grilamid LV-5H is a 50% glass fibre rein-

forced, heat stabilised polyamide 12 injection

moulding grade with the following product

profile

•  Good chemical resistance

•  Good UV Stability

•  High impact strength

•  conforms to UK WRAS drinkingwater

standards

•  Very dimensionally stable

•  Very low shrinkage

Grilamid LV-5H is suitable for production of

technical parts in the application fields of:

-  Electro

-  Electronics

-  Automotive

-  Safety technology

-  Mechanical engineering

-  Domestic appliances

2

Processing information for the injection moulding of Grilamid LV-5H

This technical data sheet for Grilamid LV-5H pro-

vides you with useful information on material prepa-

ration, machine requirements, tooling and process-

ing.

MATERIAL PREPARATION

Grilamid LV-5H is delivered dry and ready for proc-

essing in sealed, air tight packaging. Predrying is

not necessary.

Storage

Sealed, undamaged bags can be kept over a long

period of time in storage facilities which are dry,

protected from the influence of weather and where

the bags can be protected from damage.

Handling and safety

Detailed information can be obtained from the

“Material Safety Data Sheet” (MSDS) which can be

requested with every material order.

Drying

Grilamid LV-5H is dried and packed with a moisture

content of less than 0.10 %. Should the packaging

become damaged or the material is left open too

long, then the material must be dried. A too high

moisture content can be shown by a foaming melt

and silver streaks on the moulded part when in-

jected freely into the atmosphere (free shot).

Drying can be done as follows:

Temperature: max. 80°C

Time: 4 - 12 hours

Dew point of the dryer: -25°C

Temperature: max. 100°C

Drying time

If there is only little evidence of foaming of the melt

or just slight silver streaks on the part, then the

above mentioned minimal drying time will be suffi-

cient. Material, which is stored open over days,

which shows strong foaming, unusually easy flow-

ing, streaks and rough surface on the moulding

part, then the maximal drying time is required.

Silver streaks can also be caused by

overheating of the material or by too long

melt residence time in the barrel.

Drying temperature

Polyamides are subjected to the affects of oxidation

at temperatures above 80°C in the presence of

oxygen. Visible yellowing of the material is an indi-

cation of oxidation. Hence temperatures above

80°C for desiccant dryers and temperatures above

100°C for vacuum ovens should be avoided. In

order to detect oxidation it is advised to keep a

small amount of granulate (light colour only !) as a

comparison sample.

At longer residence times (over 1 hour) hopper

heating or a hopper dryer (80°C) is useful.

Use of regrind

Grilamid LV-5H is a thermoplastic material. Hence,

incomplete mouldings as well as sprues and run-

ners can be reprocessed. The following points

should be observed:

•  Moisture absorption

•  Grinding: Dust particles and particle size distri-

bution

•  Contamination through foreign material, dust,

oil, etc.

•  Quantity addition to original material

•  Colour variation

•  Reduction of mechanical properties

When adding regrind, special care has to be taken

by the moulder.

MACHINE REQUIREMENTS

Grilamid LV-5H can be processed economically and

problem-free on all machines suitable for polyam-

ides.

Screw

Wear protected, universal screws with shut-off

nozzles are recommended (3 zones).

Length: 18 D - 22 D

Compression ratio: 2 - 2.5

Shot volume

The metering stroke must be longer than the length

of the back flow valve (without decompression

distance).

Shot volume = 0.5 - 0.8 x

(max. shot volume)

Selecting the injection unit

!

Desiccant dryer

Vacuum oven

4

Heating

At least three separately controllable heating

zones, able of reaching cylinder temperatures up to

300°C. A separate nozzle heating is necessary.

The cylinder flange temperature must be controlla-

ble (cooling).

Nozzle

Open nozzles are simple, allow an easy melt flow

and are long lasting. There is however the danger

that during retraction of the screws following injec-

tion of the melt, air maybe drawn into the barrel

(decompression). For this reason, needle shut-off

nozzles are often used.

Clamping force

As a rule of thumb the clamping force can be esti-

mated using the following formula:

TOOLING

The design of the mould tool should follow the

general rules for glass fiber reinforced thermoplas-

tics.

For the mould cavities common mould tool steel

quality (e.g. hardened steel) which has been hard-

ened to level of 56 HRC is necessary. We recom-

mend additional wear protection in areas of high

flow rates in the tool (e.g. pin point gates, hot run-

ner nozzles).

Demoulding / Draft angle

Parts moulded from Grilamid LV-5H showing ex-

cellent dimensional stability. Asymmetric demould-

ing and undercuts are to be avoided. It is favourable

to foresee high numbers of large ejector pins or a

stripper plate. Demoulding draft angles between 1

to 5° are acceptable. Following values can be con-

sidered:

(VDI 3400) 12 15 18 21 24 27

Depth of roughness (µm) 0.4 0.6 0.8 1.1 1.6 2.2

Demoulding angle (%) 1 1 1.1 1.2 1.3 1.5

(VDI 3400) 30 33 36 39 42 45

Depth of roughness (µm) 3.2 4.5 6.3 9 13 18

Demoulding angle (%) 1.8 2 2.5 3 4 5

Gate and runner

To achieve an optimal mould-fill and to avoid sink

marks, a central gate at the thickest section of the

moulding is recommended. Pin point gate (direct) or

tunnel gates are more economical and more com-

mon with technical moulding.

To avoid premature solidification of the melt and

difficult mould filing, the following points should be

considered:

0.8 x thickest wall section of the injection

moulding part

1.4 x thickest wall section of the injection

moulding part (but minimum 4 mm)

VENTING

In order to prevent burning marks and improve

weldline strength, proper venting of the mould cav-

ity should be provided (venting channels on the

parting surface dimensions: Depth 0.02 mm, width

2 - 5 mm).

PROCESSING

Mould filling, post pressure and dosing

The best surface finish and a high weld line

strength is achieved with a high injection speed and

when a sufficiently long post pressure is employed.

The injection speed should be regulated so as to

reduce towards the end of the filling cycle in order

to avoid burning. For dosing at low screw revolu-

tions and pressure the cooling time should be fully

utilised.

Basic machine settings

In order to start up the machines for processing

Grilamid LV-5H, following basic settings are rec-

ommended:

Flange 80°C

Zone 1 260°C

Zone 2 265°C

Zone 3 270°C

Nozzle 265°C

Tool 80°C

Melt 260°C

Injection speed medium - high

Hold-on pressure (spec.) 300 - 800 bar

Dynamic pressure (hydr.) 5 - 15 bar

Screw speed 50 - 100 min -1

7.5 kN 1) x projected area (cm 2 )

1) in cavity pressure of 750 bar

Gate diameter

Runner diameter

Temperatures

Pressures / Speeds

5

CUSTOMER SERVICES

EMS-GRIVORY is a specialist for polyamide syn-

thesis and polyamide-processing. Our customer

services are not only concerned with the manufac-

turing and supply of engineering thermoplastics but

also provide a full of technical support program:

• Rheological design calculation / FEA

• Prototype tooling

• Material selection

• Processing support

• Mould and component design

We are happy to advice you. Simply call one of our

sales offices.

The recommendations and data given are based on our

experience to date, however, no liability can be assumed

in connection with their usage and processing.

LHT/04.01

www.emsgrivory.com

50% 玻璃纤维增强材料 聚酰胺12 EMS-GRIVORY 产品说明 Grilamid® LV-5H是一种聚酰胺12(尼龙12)材料,含有的填充物为50% 玻璃纤维增强材料. 

基本信息 UL 黄卡 E53898-102161396 填料/增强材料 玻璃纤维增强材料, 50% 填料按 重量 

添加剂 热稳定剂 特性 耐水解性 热稳定性 用途 电气/电子应用领域 动力/其它工具 工程配件 工业应用 家电部件 家用货品 连接器

 气动应用 汽车领域的应用 体育用品 消费品应用领域 液压应用 医疗器械 RoHS 合规性 RoHS 合规 形式 颗粒 加工方法 注射成型 多点数据 Shear Modulus vs. Temperature (ISO 11403-1) Viscosity vs.

该产品在北美洲,非洲和中东,拉丁美洲,欧洲或亚太地区有供货,加工方式为:注射成型. Grilamid® LV-5H的主要特性有: 阻燃/额定火焰 通过 ROHS 认证 

热稳定剂 典型应用领域包括: 电气/电子应用 汽车行业 电气用具 工程/工业

 EMS LV-5H 总代理商