Possible causes:

(1) Improper resin selection: Insufficient flexibility or low molecular weight of the resin itself results in high brittleness after film formation.

(2) Improper reactivity or dosage of the curing agent: When the reactivity of the curing agent is mismatched with that of the resin, or when the dosage does not achieve the optimal stoichiometric ratio, the crosslink density may become excessively high (resulting in brittleness) or insufficiently high (leading to weak cohesion), thereby reducing the coating’s impact resistance.

(3) Poor system compatibility: Inadequate compatibility between the resin and the curing agent leads to microphase separation within the coating, creating stress concentration points.

(4) Curing temperature conditions not met

Proposed solution:

(1) Adjust the process: reduce the curing temperature by 10–15°C or shorten the baking time by 5–10 minutes;

(2) Formulation adjustment: Add Huanyu HY216/217 curing accelerator.

Possible causes:

(1) System viscosity issues (affecting three-dimensionality);

(2) Problems arise during the reaction process;

(3) Influence of flow aids or other additives;

Proposed solution:

(1) Addressing insufficient three-dimensionality (viscosity adjustment)

Adjusting system viscosity: By replacing the resin or adjusting the filler dosage, the melt viscosity of the system can be appropriately increased to reduce flow during the early stages of curing, thereby allowing wrinkles to fully develop.

(2) Regarding the overall reaction process (adjustment of the curing rate)

Add the HuanYu HY217 curing accelerator additive.

By fine-tuning the curing reaction rate, the formation of wrinkles is better aligned with the curing process. This not only facilitates full texture development and ensures timely setting but also enhances three-dimensionality; the formulation is suitable for both hot and cold curing ovens.

Possible causes:

(1) The silver powder has not been dispersed.

(2) Issue with the base powder system: insufficient wetting of the silver powder by the resin.

(3) Silver powder has intrinsic characteristics: high surface energy and a strong tendency to agglomerate.

Proposed solution:

Add HY74 silver-powder alignment agent. It reduces the surface energy of the silver powder, prevents agglomeration, enhances the resin’s wettability toward the silver powder, promotes the oriented alignment of silver particles on the coating surface, and intensifies the metallic shimmer effect.

Possible causes:

(1) Differences in the charge characteristics of different components, relatively coarse particle size, and significant variations in particle size and bulk density among powder particles.

(2) Color separation and blooming occur on the coating surface.

(3) Inconsistent color proportions across different regions

(4) The coating color deviates significantly from the standard color chart.

(5) Poor color consistency in mass production

Possible causes:

(1) Ingredient errors/pigment variation

(2) Changes in baking conditions

(3) Changes in formulation design

Proposed solution:

To address yellowing, the addition of HuanYu’s high-temperature and yellowing-resistant additive HYB500 effectively scavenges free radicals, inhibits oxidation reactions, enhances resin thermal stability, and slows down the yellowing process of the coating. It exhibits excellent resistance to temperatures of 230–250°C and also provides resistance to natural gas.

Possible causes:

(1) Poor powder chargeability

(2) Resin is low

(3) Improper air pressure

(4) Faraday cage effect

(5) Powder deviation at the four corners of the groove

Proposed solution:

Add HuanYu HY306 antistatic agent (for powder application in grooves), HY309 high-efficiency charge-enhancing agent, and HY8369 all-in-one powder-applied masking agent to enhance the powder’s charge adsorption capability.

Enhancing charge retention time improves the electrostatic attraction between the powder and the workpiece, strengthens edge coverage, reduces the Faraday cage effect, increases powder application efficiency for complex geometries, and improves the thickness of the first powder coat.

Possible causes:

(1) Contaminated

(2) Insufficient addition of leveling agent

(3) Poor dispersion

(4) External Contamination

(5) Raw Material Quality

(6) Process control or environmental factors

Proposed solution:

(1) If the leveling agent is insufficient, it must be replenished;

(2) For craters caused by contamination, the HuanYu HY518 anti-interference agent can be added to the formulation to eliminate surface tension differences at contaminated spots and enhance the coating’s resistance to contamination. Scope of application: mild contamination or preventive addition.

Possible causes:

(1) Insufficient increase in the amount of benzoin

(12) Uneven dispersion

(3) Insufficient molecular weight distribution of the resin <

(4) Excessive small molecules/water molecules in the material

Proposed Solution

(1) If the benzoin content is insufficient, add HuanYu HY406 benzoin;

(2) Excessive small molecules require draining the air compressor.

Possible causes:

(1) Extruded rubber compound/screw cavity cured product

(2) Impurities in Raw Materials

(3) The spray coating thickness is too thin.

(4) The substrate contains particles/fibers.

Proposed solution:

(1) Cleaning equipment

(2) Replace the raw materials

(3) Adjust the spray coating thickness

(4) Substrate Treatment