摘要:
Touch fastener products, as well as apparatus and methods for manufacturing such products, are described. The methods and apparatus feature certain mold cavity shapes that are designed to facilitate demolding of hammer hook touch fastener elements exhibiting desirable fastening properties. Such mold cavity shapes can be combined with particularly soft molding resins to produce useful fastening products.
摘要:
A method for making a mushroom-type hook strap for mechanical fasteners is disclosed. In a first stage of the method, a hook strap on which a plurality of hook preforms each having a substantially V-shaped free end are integrally molded. Then, in a second stage of the method, the V-shaped free end of each of the hook preforms is deformed into a polygonal head portion by two calendar rolls so as to form a mushroom-type hook strap that has a higher engaging percentage with the loop strap, has a longer lifetime, and is capable of providing a reliable and all-directional uniform fastening function.
摘要:
A method for producing a plastics product consisting of a support (30) having protruding stem parts (36) which have at their free end a head part (38) having a wider diameter compared with the respective stem part (36), wherein the stem parts and the head parts are formed in cavities (16) of a moulding screen (12) that are formed, on their sides facing away from the support (30), in a shaping zone of the moulding screen (12), is characterized in that the shaping zone is sealed off from the environment by means of a counter-surface (20) such that a predefinable amount of air enclosed in the shaping zone exerts a counter-pressure on the plastics material introduced into the respective cavity (16) of the shaping zone in order to support the shaping process.
摘要:
A hook fastener including a base strip and a field of hooks, each hook having a stem and a cap, the cap including at least one lateral overhang, and each hook being further delimited by two opposing substantially planar surfaces, wherein the overhang includes a swelling located at a distance from the stem so that the thickness of the overhang increases in the swelling, the bottom surface of the overhang forming a cavity for receiving filaments.
摘要:
A structured surface, which includes a thermoplastic backing sheet and a first upstanding element, is disclosed. The first upstanding element includes multiple, spaced-apart posts and a single cap at the distal ends of the multiple, spaced-apart posts. The structured surface furthermore typically includes a plurality of spaced-apart, upstanding posts with caps on their distal ends, where the ratio of the caps to the posts is less than one-to-one. Also disclosed is a method of making a structured surface. The method includes providing a thermoplastic backing sheet with a plurality of spaced-apart, upstanding posts; and deforming the distal ends to form caps on at least some of the spaced-apart, upstanding posts. At least some of the caps upon forming touch at least one adjacent cap to form a conjoined cap at the distal ends of multiple posts.