Product Information
Oct 2019
Petra® 140
Polyethylene Terephthalate (PET)
 

 
Product Description
Petra 140 is a 45% glass reinforced polyethylene terephthalate (PET) injection molding compound offering an increased level of strength, stiffness, high temperature performance, dimensional stability. Excellent resistance to creep under load, and maintains the inherent chemical and electrical properties associated with polyesters.

Applications
Petra 140 is generally recommended for applications such as load bearing structural housings and mechanical components.

PHYSICAL ISO Test Method Property Value
Density, g/cm³ 1183 1.70
MECHANICAL ISO Test Method Property Value
Tensile Modulus, MPa 527  
    23C 16,200
Tensile stress at break, MPa 527  
    23C 180
Tensile strain at break, % 527  
    23C 3.0
Flexural Strength, MPa 178  
    23C 255
IMPACT ISO Test Method Property Value
Charpy Notched, kJ/m2 179  
    23C 11.5
THERMAL ISO Test Method Property Value
Melting Point, C 3146 245
HDT A, C 75 220
HDT B, C 75 242
ELECTRICAL ISO Test Method Property Value
Volume Resistivity (Ohm-m) IEC 60093 >1E13

Processing Guidelines
Material Handling
Max. Water content: 0.02%
To ensure optimum part performance, this product must be dried prior to molding and maintained at a moisture level of less than 0.02%, with a preferred moisture target of less than 0.015%. A dehumidifying hopper dryer mounted on the molding machine and equipped with alternating desiccant beds and air temperature/dew point indicators is recommended. Drying time is 2 - 4 hours at 120C (248F). Further information concerning safe handling procedures can be obtained from the Safety Data Sheet. Alternatively, please contact your BASF representative.

Typical Profile
Melt Temperature 280-300C (536-572F)
Mold Temperature 100-110C (212-230F)
Injection and Packing Pressure 35-125 bar (500-1500 psi)


Mold Temperatures
This product can be processed over mold temperatures of 80-120C (176-248F); however, for optimizing surface appearance, dimensional stability and part performance, mold surface temperatures of 100-110C (212-230F) are preferred.

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. Minimal back pressure should be utilized to prevent glass breakage. recommended to minimize glass fiber breakage.

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