Methods for making fasteners

A fastener for engaging with a loop fabric, comprising a sheet-form base having a front surface with a multiplicity of engaging projections at least some of the engaging projections having a top surface end and an attached end, which attached end is fused to the front surface of the base and the top surface forming an edge at least partially surrounding the projection;

• and
• a mantle surface extending from the top surface end edge to the attached end;
• at least one contour line of a side view of the mantle surface being strictly convex from the top surface edge to the attached end;
• wherein the at least some engaging projections are formed of a thermoplastic polymer.

A method for forming a fastener, comprising:

• providing a multiplicity of suitable thermoplastic particles;
• providing a base with a front surface;
• randomly dispersing and adhering, on the base front surface, the multiplicity of polymer particles thereby forming separate projections attached with their attachment ends at and projecting from the base front surface to corresponding terminal ends;
• providing a deformation means having a contact surface;
• contacting the terminal ends of the projections with the contact surface of the deformation means to heat the terminal ends above a softening temperature to deform the terminal ends so that they form a rim comprising an acute edge angle thereby forming engaging projections.