Resin button raw materials: The raw materials for producing buttons are mainly unsaturated polyester resins, curing agents, and auxiliary materials.
(1) Unsaturated polyester resins require a viscosity of 10-20 Pa.s for the production of buttons, low heat release during curing, short gel times, easy coloration of the resin, and relatively slow hardness growth during the curing stage.
(2) The curing agent initiator is methyl ethyl ketone peroxide, and the accelerator is cobalt naphthalate.
(3) Auxiliary materials include color pastes, pearl powders, thixotropic agents, and the like. The pearl powder is hexagonal flake crystals of basic lead carbonate, which can be arranged in parallel during the molding process to show pearl luster. The thixotropic agent is active silica and is mainly used to prevent no color from permeating each other.
Production process: Polyester buttons are produced by centrifugal cast bar casting method, first made of plate or bar, then made by cutting, cutting rods, and then heat treatment, scraping, scraping bottom, milling slot, drill
Several major varieties of resin buttons.
(1) The magnetic button buttons have a single color and no pattern, but can be made into various shapes.
(2) The flat pearl button product features that the pearl brightness is the same in the entire button surface, like a mirror, bright color, appearance and pearl plexiglass buttons is difficult to distinguish. Most of the pearlescent buttons are mostly used for shirt buckles.
(3) The pearlescent arrangement of Moonlight button buttons is corrugated, the pearlescent brightness is high, and the bright spot shines like a cat's eye.
(4) Rainbow buttons This type of pearl button features a non-regular cloud of pearls on the surface and displays colorful effects. This kind of pearlescent button and pearl shell effect of natural shells are closer, so called imitation shell buttons.
(5) Stick flowers and mixed flower buttons have delicate and smooth lines on the surface. The colors are natural, and they have natural bamboo and wood textures. Therefore, they are also called imitation wood buttons and imitation bamboo buttons. This kind of button is mainly used in some casual clothes.
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