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    Home > Coatings News > Paints and Coatings Market > Coating process: spray coating process of plastic top coat

    Coating process: spray coating process of plastic top coat

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    The key points are as follows: there are two basic conditions for the application of the paint on the surface of plastic parts: one is good adhesion; the other is that the paint can not over dissolve the plastic surface Most hard plastics do not need to be coated with primer, and the top coat can adhere to its surface well; semi hard plastics need to add "flexible agent" to the paint layer, which can make the paint layer have certain deformation ability when the matrix expands without falling off or cracking For the spraying of plastic parts, it is better to use a set of supporting materials provided by the manufacturer, such as flexible agent, top coat, inner coating material, diluent and diluent, etc Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Paint Home News: plastic parts spraying finish technology operation for plastic surface paint must have two basic conditions: first, good adhesion; second, paint can not be too corrosive plastic surface Most hard plastics do not need to be coated with primer, and the top coat can adhere to its surface well; semi hard plastics need to add "flexible agent" to the paint layer, which can make the paint layer have certain deformation ability when the matrix expands without falling off or cracking For the spraying of plastic parts, it is better to use a set of supporting materials provided by the manufacturer, such as flexible agent, top coat, inner coating material, diluent and diluent, etc 1 Spraying of rigid plastic parts 1.1 spraying of internal rigid plastic parts generally does not need to spray primer and putty; the color of the top coat of some plastic parts is determined by the adjustment number on the body coding plate, and the top coat is mainly acrylic paint Each large paint factory provides internal paint chart to users, including supply number, name, gloss coefficient and adjustment number of internal paint The painting methods of internal hard plastic parts are as follows: ① clean the surface of plastic parts with solvent; ② spray general internal acrylic paint according to the adjustment number; ③ dry the paint layer according to the specified time, and then install it on the vehicle; 1.2 spraying of external hard plastic parts Generally, the exterior hard plastic parts can be sprayed with the top coat without spraying the primer However, some manufacturers recommend spraying the primer first and then the top coat In either case, the method of spraying the top coat is the same: ① thoroughly clean the part surface with cleaning agent ② spray the top coat with appropriate color ③ after the paint surface is completely dry, install the parts on the vehicle ④ Before painting fiberglass parts, putty shall be applied first and then finish paint shall be sprayed according to the method of spraying body steel plate A layer of adhesive aid shall be sprayed before local repair of hard plastic parts which have been sprayed with aeroplastic film compound During operation, use 400 × wet sandpaper to polish the damaged parts, and then apply primer, adhesive aid and top coat 2 The spraying of elastic plastic parts most of the paint layers of elastic plastic parts need to be added with elastic agent, so that the paint surface will not crack when it is deformed The paint surface added with elastic agent is called elastic paint layer The spraying methods are as follows: ① thoroughly polish the whole surface with 400 × sandpaper, and clean the whole surface with cleaning agent ② According to the regulations of the manufacturer, mix the primer, elastic agent and solvent together When mixing, first mix the primer and elastic agent, and then add appropriate solvent according to the temperature of the workshop ③ Adjust the pressure of the spray gun to the specified value and spray sufficient double wet coating to completely cover the surface ④ The primer is dried for 30-60min, and then the bright layer is sprayed After drying, it is installed on the vehicle for use 3 The example of plastic part spraying is polypropylene bumper spraying When spraying the plastic part, because the plastic is very hard, a special primer - internal polypropylene paint should be sprayed first, and then the top coat can be sprayed The specific spraying process is as follows: ① clean the surface with solvent ② According to the requirements of the manufacturer, spray the diluted and evenly mixed polypropylene primer, dry for 1-2h, and then spray the top coat ③ Spray acrylic enamel with proper proportion, dry for 8h to ensure the paint layer is hardened ④ When the primer is applied to the bottom layer and the varnish layer is applied, the primer shall be sprayed first, then the acrylic paint shall be sprayed after it is dry, and then the varnish layer shall be sprayed after it is dry for 15-30min ⑤ Re spraying process of damaged polypropylene bumper Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,
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