Product Information
Sep 2017
Ultradur® B 4520 PRO
PBT (Polybutylene Terephthalate)
 

 
Product Description
Ultradur B 4520 PRO is an unfilled injection molding PBT grade, which supports customers in product development for the medical technology market. This grade complied with US Pharmacopoeia: Biological Reactivity Tests, USP Plastic Class VI (USP VI), ISO 10993-5: Biological Evaluation of Medical Devices Part 5: Test for Cytotoxicity, DMF: A Drug Master File (DMF) has been registered at FDA for Ultradur® PRO and Food Contact: Ultradur® PRO is in compliance with multiple regional food contact regulations, especially for Europe and United States.

PHYSICAL ISO Test Method Property Value
Density, g/cm³ 1183 1.30
Viscosity Number, cm³/g 1628 120
RHEOLOGICAL ISO Test Method Property Value
Melt Volume Rate (250 C/2.16 Kg), cc/10min. 1133 25
MECHANICAL ISO Test Method Property Value
Tensile Modulus, MPa 527  
    23C 2,600
Tensile stress at yield, MPa 527  
    23C 60
Tensile strain at yield, % 527  
    23C 10.8
Nominal strain at break, % 527  
    23C 30
IMPACT ISO Test Method Property Value
Charpy Notched, kJ/m2 179  
    23C 4.5
Charpy Unnotched, kJ/m2 179  
   -30C 140
    23C 228
THERMAL ISO Test Method Property Value
Melting Point, C 3146 223
HDT A, C 75 55
HDT B, C 75 155

Processing Guidelines
Material Handling
Max. Water content: 0.04%
To ensure optimum part performance, this product must be dried prior to molding and maintained at a moisture level of less than 0.04%. Dehumidifying or desiccant dryers operating at 100-120C (212-248F) at 4 hours drying time is recommended. Further information concerning safe handling procedures can be obtained from the Safety Data Sheet. Alternatively, please contact your BASF representative.

Typical Profile
Melt Temperature 250-270C (482-518F)
Mold Temperature 40-80C (104-176F)
Injection and Packing Pressure 35-125 bar (500-1500 psi)


Mold Temperatures
This product can be processed over mold temperatures of 40-80C (104-176F), although 80C (176 deg F) will result the best surface.

Pressures
Injection pressure controls the filling of the part and should be applied for 90% of ram travel. Packing pressure affects the final part and can be used effectively in controlling sink marks and shrinkage. It should be applied and maintained until the gate area is completely frozen off.

Back pressure can be utilized to provide uniform melt consistency and reduce trapped air and gas. A maximum of 10 bar (145 psi) is recommended due to the risk of excessive shear.

Fill Rate
Fast fill rates are recommended to ensure uniform melt delivery to the cavity and prevent premature freezing. Surface appearance is directly affected by injection rate.


Note
Although all statements and information in this publication are believed to be accurate and reliable, they are presented gratis and for guidance only, and risks and liability for results obtained by use of the products or application of the suggestions described are assumed by the user. NO WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE MADE REGARDING PRODUCTS DESCRIBED OR DESIGNS, DATA OR INFORMATION SET FORTH. Statements or suggestions concerning possible use of the products are made without representation or warranty that any such use is free of patent infringement and are not recommendations to infringe any patent. The user should not assume that toxicity data and safety measures are indicated or that other measures may not be required.
 


  BASF Corporation
Engineering Plastics
1609 Biddle Avenue
Wyandotte, MI 48192
General Information: 800-BC-RESIN
Technical Assistance: 800-527-TECH (734-324-5150)
Web address: http://www.plasticsportal.com/usa