Mushroom head hook-and-loop fastener

Abstract

The invention discloses a mushroom head hook-and-loop fastener which comprises a loop surface and a hook surface, the hook surface comprises a hook substrate and hooks on the surface of the hook substrate, each hook comprises a hook column and a hook head at the end of the hook column, the hook surface forms a plastic substrate through an extruder and then rolling is performed on plastic substrates; a calendering machine comprises a calendering roller, the calendering roller comprises a plurality of forming discs which are axially overlapped, and a forming groove is formed in a splicing line between every two adjacent forming discs, so that a semi-forming groove is formed in the edge of each forming disc; when the hook thorns are broken in the forming groove, the forming discs are separated from each other, the forming groove is divided into two open semi-forming grooves at the moment, the broken hook thorns stay in the semi-forming groove on one side, then the hook thorns stay in thesemi-forming grooves are taken out, the forming discs are fixed again, and the calendering roller can be formed. The adhesive force of the hook-and-loop fastener can be improved, the service life of the hook-and-loop fastener can be prolonged, and the hook-and-loop fastener is convenient to manufacture, machine and maintain in the production process.

Description

technical field [0001] The invention relates to the field of Velcro technology, in particular to a mushroom head Velcro. Background technique [0002] Due to the advantages of convenient use and low price, the use of Velcro has become wider and wider. The existing Velcro usually consists of two thin strips, and a large number of fine "circles" are arranged on the surface of one thin strip. Commonly known as "circle noodles", there are a large number of small "hooks" on the surface of another sheet strip, commonly known as "hook noodles", in which the circle is composed of fine fibers, and the hooks are divided into single-sided hooks. Thorns and double-sided barbs. When the two sheet strips are pressed against each other, the barbs enter the circle and hook the circle, so that the two sheet strips are bonded to each other. When separation is required, only one of the sheet strips needs to be torn vigorously to separate the two sheet strips from each other. [0003] Howeve...

AI Technical Summary

Problems solved by technology

[0003] However, the existing Velcro has the following defects: First, because the barbs are extremely small, after repeated bonding and separation of the Velcro, its The barb will gradually lose its original elasticity and become straight, so that the adhesive force between the barb surface and the loop surface will gradually decrease and become invalid

However, the calendering roller for calendering needs to process a large number of small forming grooves matching the shape of the barbs on the circumferential surface. In the forming groove, it will affect the normal progress of subsequent elongation processing, and it is very difficult to take out the small barbs from the forming groove, which makes the maintenance of the calender roller inconvenient in production

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