Method and device for producing fastener parts from radiation cured plastic materials
AssigneeBinder Kletten-Haftverschluss-Systeme GmbH
InventorKonstantinos Poulakis
Life of this patent
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Abstract
A process produces cling-fastener parts with a large number of interlocking members (24) from a formulation encompassing radiation-crosslinkable prepolymers. The prepolymer is molded, cast, and/or compression molded into the shape of a large number of interlocking members (24) together with a cling-fastener base (21), and is then radiation-cured. The apparatus producing the cling fasteners encompasses a feed (32, 10) for the formulation (14) of radiation-crosslinkable, in particular acrylic, prepolymers, at least one shaping roll (11) and one backing roll (12). The shaping roll (11) has a large number of radial cutouts (17). A source of UV radiation (19), or an electron-beam source, provides radiation curing of the molded radiation-curable formulation.
Claims21
A process for producing cling fastener parts with a large number of interlocking members, comprising the steps of:
- supplying a formulation of radiation-cross linkable prepolymers to a gap between a shaping roll and a backing roll of a forming station, said formulation having a viscosity of 150 to 20,000 mPa.s at 25° C.;
- compressing the formulation into radial cutouts in the shaping roll in the forming station to form a large number of interlocking members together with a base;
- and
- treating the interlocking members and base with radiation to cure the formulation thereof.
A process for producing cling fastener parts having a plurality of interlocking members, said process comprising the steps of:
- supplying a viscous radiation-crosslinkable prepolymer formulation to a backing material;
- said formulation having a viscosity of 150 to 20,000 mPa.s at 25° C.;
- spreading said viscous formulation into a continuous layer on said backing material;
- feeding said backing material and viscous formulation through a gap between a shaping roll having a plurality of cutouts for forming said interlocking members integral with a continuous base layer on said backing material;
- irradiating said backing material, base layer and interlocking members to cure said prepolymer formulation;
- and
- removing said interlocking members from said shaping roll.
Dependencies are inferred from the claim text.