{"id":162550,"date":"2021-02-23T03:44:11","date_gmt":"2021-02-23T03:44:11","guid":{"rendered":"http:\/\/facfox.com\/docs\/?post_type=kb&p=162550"},"modified":"2021-02-23T03:45:40","modified_gmt":"2021-02-23T03:45:40","slug":"overmolding-chemical-and-mechanical-bonding","status":"publish","type":"kb","link":"https:\/\/facfox.com\/docs\/kb\/overmolding-chemical-and-mechanical-bonding","title":{"rendered":"Overmolding: Chemical and Mechanical Bonding"},"content":{"rendered":"

Overmolding<\/a><\/strong> is not a new manufacturing technology, but there is still some confusion about how to design for the two-part process. One of the largest areas to consider? Bonding. A number of materials can be used to overmold components together, but without a chemical bond or mechanical interlock, some overmolded parts won\u2019t stand the test of time.<\/p>\n

\n
\n

Chemical Bonding<\/h3>\n

This bonding process involves two chemically compatible materials that are molded together to form a strong bond with each other. It\u2019s important to note that not all materials play well with one another. The compatibility chart below indicate whether a chemical or mechanical bond is recommended for key thermoplastic and thermoset materials.<\/p>\n

<\/p>\n

Mechanical Interlocking<\/h3>\n

What happens when your materials are not compatible, the desired bonding strength cannot be achieved, or you want to ensure your materials don\u2019t peel apart from repeated use? This is where designing a mechanical interlock, which physically holds the overmolded material to the substrate, makes sense. There are many ways to design these into parts (see example), so discuss the options with your manufacturer.<\/p>\n<\/div>\n<\/div>\n

Chemical Bonding Compatibility<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
SUBSTRATE MATERIAL<\/th>\n<\/tr>\n
OVERMOLD MATERIAL<\/th>\nABS LUSTRAN<\/th>\nABS\/PC CYCOLO C2950-111<\/th>\nPC LEXAN
\n940-701<\/th>\n		PBT VALOX
\n357-1001<\/th>\n		PP PROFAX 6323<\/th>\nNYLON 66
\nZYTEL 103 HSL NC010<\/th>\n<\/tr>\n
TPU – Texin
\n983-000000<\/td>\n		C<\/td>\nC<\/td>\nC<\/td>\nC<\/td>\nM<\/td>\nM<\/td>\n<\/tr>\n
TPV – Santoprene
\n101-87<\/td>\n		M<\/td>\nM<\/td>\nM<\/td>\nM<\/td>\nC<\/td>\nM<\/td>\n<\/tr>\n
TPE – Santoprene
\n101-64<\/td>\n		M<\/td>\nM<\/td>\nM<\/td>\nM<\/td>\nC<\/td>\nM<\/td>\n<\/tr>\n
LSR – Elastosil
\n3003\/30 A\/B<\/td>\n		–<\/td>\n–<\/td>\nM<\/td>\nM<\/td>\n–<\/td>\nM<\/td>\n<\/tr>\n
TPC – Hytrel 3078<\/td>\nC<\/td>\nC<\/td>\nC<\/td>\nC<\/td>\nM<\/td>\nM<\/td>\n<\/tr>\n
TPE-Versaflex OM
\n1060X-1<\/td>\n		C<\/td>\nC<\/td>\nC<\/td>\nM<\/td>\nM<\/td>\nM<\/td>\n<\/tr>\n
TPE-Versaflex OM
\n6240-1\/td><\/td>\n		M<\/td>\nM<\/td>\nM<\/td>\nM<\/td>\nM<\/td>\nC<\/td>\n<\/tr>\n
TPE-Versaflex OM
\n6258-1<\/td>\n		M<\/td>\nM<\/td>\nM<\/td>\nM<\/td>\nM<\/td>\nC<\/td>\n<\/tr>\n
TPE-Versaflex OM
\n1040X-1<\/td>\n		C<\/td>\nC<\/td>\nC<\/td>\nM<\/td>\nM<\/td>\nM<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

M = mechanical bond recommended<\/p>\n

C = chemical bond<\/p>\n

If you have further questions regarding rapid overmolding at FacFox, contact one of our applications engineers at info@facfox.com.<\/p>\n","protected":false},"excerpt":{"rendered":"

Overmolding is not a new manufacturing technology, but there is still some confusion about how to design for the two-part process. One of the largest areas to consider? Bonding. A number of materials can be used to overmold components together, but without a chemical bond or mechanical interlock, some overmolded parts won\u2019t stand the test […]<\/p>\n","protected":false},"author":4,"featured_media":162551,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"kbtopic":[45],"kbtag":[451,61,99,403],"class_list":["post-162550","kb","type-kb","status-publish","has-post-thumbnail","hentry","kbtopic-tech","kbtag-chemical-bonding","kbtag-material","kbtag-overmolding","kbtag-technology"],"yoast_head":"\nOvermolding: Chemical and Mechanical Bonding - FacFox Docs<\/title>\n<meta name=\"description\" content=\"Overmolding is not a new manufacturing technology, but there is still some confusion about how to design for the two-part process. 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