Importance

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Abstract

First and second molten resins are continuously injected toward the respective circumferential surfaces of a die wheel and an associated roller in rotation in opposite directions. The die wheel has in its circumferential surface a multiplicity of engaging-element-forming cavities, and the associated roller is disposed in parallel confronting relationship with the die wheel with a gap equal to the thickness of a substrate sheet of a molded surface fastener member. During that time, a porous core sheet is introduced toward a meeting point of the first and second molten resins and is sandwiched between a first substrate sheet part, which is molded on the circumferential surface of the die wheel, and a second substrate sheet part, which is molded on the circumferential surface of the associated roller, to form a unitary laminate substrate sheet. The resulting molded surface fastener member is free from expansion and local thin portions in either substrate sheet part and is therefore prevented from being torn.

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First Claim