Patent Application
20130157038
1. Technical Field
The present disclosure relates to composites, particularly to a composite having high bonding strength and a method for making the composite.
2. Description of Related Art
Adhesives, for combining heterogeneous materials in the form of a metal and a synthetic resin are in demand in a wide variety of technical fields and industries, such as the automotive and household appliance fields. However, the bonding strength of the metal and resin is weak. Furthermore, adhesives are generally only effective in a narrow temperature range of about −50° C. to about 100° C., which means they are not suitable in applications where operating or environmental temperatures may fall outside of the range. Due to the above reason, other bonding methods have been applied that do not involve the use of an adhesive. One example of such methods is by forming bonds through injection molding or other similar process. However, the bonding strength of the metal and resin can be further improved.
Therefore, there is room for improvement within the art.
Many aspects of the disclosure can be better understood with reference to the following figures. The components in the figures are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the disclosure. Moreover, in the drawings like reference numerals designate corresponding parts throughout the several views.
The substrate 11 may be made of metal, glass, or ceramic. The metal can be stainless steel, magnesium alloy, or copper alloy.
Referring to
It should be understood that, the pore diameter and the pore depth of the micro-pores 111, and the space of each two micro-pores 111 can be adjusted.
In the embodiment, the micro-pores 111 are regularly distributed in an array in the surface of the substrate 11. Alternately, the micro-pores 111 can be irregularly distributed in the surface of the substrate 11.
Referring to
The resin composition 13 may be coupled to the substrate 11 by molding. The resin composition 13 may be made up of crystalline thermoplastic synthetic resins having high fluidity. In the exemplary embodiment, polyphenylene sulfide (PPS), polyamide (PA), polybutylene terephthalate (PBT), or polyethylene terephthalate (PET) can be selected as the molding materials for the resin composition 13. The resin composition 13 can bond firmly with the substrate 11. The molding materials can be added with some fiberglass to improve the property for molding.
A method for making the composite 100 may include the following steps:
The substrate 11 is provided.
The substrate 11 is cleaned. The cleaning process may be carried out by dipping the substrate 11 in a water solution containing Nat The water solution may contain sodium carbonate, sodium phosphate, and sodium silicate. The sodium carbonate may have a mass concentration of about 30 g/L-about 50 g/L. The sodium phosphate may have a mass concentration of about 30 g/L-about 50 g/L. The sodium silicate may have a mass concentration of about 3 g/L-about 5 g/L. During the dipping process, the water solution may keep at about 50° C.-about 60° C. The dipping process may last about 5 min-about 15 min After that, the substrate 11 is rinsed.
The substrate 11 is laser etched to form the micro-pores 111 in a surface of the substrate 11. The laser etching process may be carried out using a laser machine having the parameters of, power: about 10 W-about 30 W, frequency: about 20 KHZ-about 60 KHZ, and step length: about 0.005 μm-about 0.1 μm.
Referring to
Tensile strength and shear strength of the composite 100 have been tested. The tests indicated that the shear strength of the composite 100 was about 20 MPa-about 30 MPa, and the tensile strength of the composite 100 was about 8 MPa-about 16 MPa. Furthermore, the composite 100 has been subjected to a temperature humidity bias test (72 hours, 85° C., relative humidity: 85%) and a thermal shock test (48 hours, −40° C.-85° C., 4 hours/cycle, 12 cycles total), such testing did not result in decreased the shear strength and the tensile strength of the composite 100.
The exemplary method of forming the micro-pores 111 is very effectively comparing to the conventional chemical etching, electrochemical etching or anodizing treating, and simultaneously fit for multiple materials.
It is believed that the exemplary embodiment and its advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the disclosure or sacrificing all of its advantages, the examples hereinbefore described merely being preferred or exemplary embodiment of the disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201110420534.6 | Dec 2011 | CN | national |
