1, resin button raw materials:
The raw materials for producing buttons are mainly unsaturated polyester resins, curing agents, and auxiliary materials.
(1) Unsaturated polyester resin: The resin used in the production of buttons requires a viscosity of 10-20 Pa.s, low heat release during curing, short gelation time, easy coloration of the resin, and relatively slow hardness growth during the curing stage.
(2) Curing agent: Methyl ethyl ketone peroxide is used as the initiator, and cobalt naphthalate is used as the accelerator.
(3) Auxiliary materials: color paste, pearl powder, thixotropic agent, etc. 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.
2, production process:
Polyester buttons are produced by centrifugal cast bar casting method. Plates or rods are made first, and then button plates and cut rods are used to make button blanks. After heat treatment, scraping, scraping, milling, and drilling.. .. Several major varieties of resin buttons.
(1) Magnetic buttons: Buttons are a single color and have no pattern, but they can be made into various shapes.
(2) Flat Pearl Button: The product is characterized in that the pearlescent brightness is the same in the entire button surface, like a mirror mirror, bright color, and the appearance of pearl glass button is difficult to distinguish. Most of the pearlescent buttons are mostly used for shirt buckles.
(3) Moonlight button: The pearl surface of the button surface is arranged in a corrugated manner, with high pearlescent brightness, and the bright spot shines like a cat's eye.
(4) Rainbow button: This type of pearl button is characterized by the surface of the pearl arrangement is irregular clouds, and shows a colorful effect. This kind of pearlescent button and pearl shell effect of natural shells are closer, so called imitation shell buttons.
(5) Sticks, mixed flowers button: the surface has delicate smooth lines, natural colors, with a natural bamboo, wood texture, it is also known as imitation wood buttons, imitation bamboo buttons. This kind of button is mainly used in some casual clothes. (A12)
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