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How to prevent the surface of fiberglass from wrinkling, becoming sticky, or developing pinholes?
Release time:
2023/09/05
In the process of manufacturing fiberglass products, improper operation may lead to issues such as wrinkling, pinholes, and stickiness on the surface of the fiberglass products. Let's understand the causes of these phenomena and the measures to prevent them. 1. Wrinkling of fiberglass products often occurs in the gel coat layer. If the first coat of gel coat has not completely gelled before applying the second layer, the styrene in the second layer may dissolve the first layer, causing swelling and resulting in wrinkles. Solutions: 1) Appropriately increase the working environment temperature. When applying the first layer of gel coat, use infrared bulbs to dry it before applying the second layer. Wait for the gel coat layer to gel before applying the layer resin; 2) Appropriately increase the amount of initiators and accelerators; 3) Control the environmental temperature in the workshop, ideally between 18-20°C. 2. Stickiness on the surface of fiberglass products during production is often due to the products being exposed to humid air or direct airflow from exhaust equipment like blowers or fans, causing excessive evaporation of styrene, which ultimately leads to a lack of wax-free resin in the layer, resulting in stickiness. Solutions: 1) Avoid producing products in low temperature or humid conditions; 2) Add 0.02% paraffin to the resin to prevent the polymerization effect of oxygen in the air; 3) Control the direction of ventilation to avoid drafts and reduce the evaporation of crosslinking agents; 4) Adjust the amount of initiators and accelerators based on the indoor environmental temperature; 5) Alternatively, use paraffin resin directly for operations. 3. Pinholes on the surface of fiberglass products are mainly caused by small bubbles entering the gel coat layer before gelling, dust on the mold surface, or high viscosity when adding flame retardants, leading to the evaporation of the solvent and leaving pinholes. Solutions: 1) Use a roller for impregnation during the molding process to eliminate bubbles; 2) Add suitable defoamers, such as silicone oil, to the resin; 3) Control the working environmental conditions, avoiding excessive humidity and ensuring that high temperatures are not too low; 4) The amount of catalyst should not be excessive to avoid premature gelling and bubble formation; 5) Ensure that materials are not damp; if they are, they need to be dried; 6) Keep the mold surface clean. These are the causes and preventive measures for issues such as wrinkling, pinholes, and stickiness on the surface of fiberglass products. We hope this information is helpful. Guangxi Fiberglass Products Co., Ltd. is a professional manufacturer of fiberglass products, and our products are well-received by users. We welcome inquiries by phone.
Improper operation during the production of fiberglass products may lead to phenomena such as wrinkling, pinholes, and stickiness on the surface of fiberglass products. Let's understand the causes of these phenomena and the measures to prevent them.
1. Wrinkling of fiberglass products often occurs in the gel coat layer. If the first coat of gel coat is not fully gelled before applying the second layer, the styrene in the second layer may dissolve the first layer, causing swelling and wrinkles. Treatment methods:
1) Appropriately raise the working environment temperature. When applying the first layer of gel coat, use infrared bulbs to dry it before applying the second layer. After the gel coat layer has gelled, apply the layer resin.
2) Appropriately increase the amount of initiators and accelerators.
3) Control the environmental temperature in the workshop, ideally between 18-20°C.
2. The stickiness on the surface of fiberglass products during production is often due to the products being exposed to humid air or direct airflow from exhaust equipment like blowers or fans, causing excessive evaporation of styrene, resulting in a lack of wax-free resin in the final layer, leading to stickiness. Treatment methods:
1) Avoid producing products under low temperature or humid conditions.
2) Add 0.02% paraffin to the resin to prevent the polymerization effect of oxygen in the air.
3) Control the direction of ventilation to avoid drafts and reduce the evaporation of crosslinking agents.
4) Control the amount of initiators and accelerators based on the indoor environmental temperature.
5) Alternatively, directly use paraffin resin for operations.
3. The pinholes on the surface of fiberglass products are mainly caused by small bubbles entering the gel coat layer before gelation, dust on the mold surface, or when adding flame retardants, due to high viscosity, leading to the evaporation of the solvent and leaving pinholes. Treatment methods:
1) Use a dipping roller during the molding process to drive out bubbles.
2) Suitable defoamers, such as silicone oil, should be added to the resin.
3) Control the working environmental conditions; the surrounding humidity should not be too high, and the temperature should not be too low.
4) The amount of catalyst should not be excessive to avoid premature gelation and bubble formation.
5) Ensure that materials are not damp; if they become damp, they need to be dried.
6) Keep the mold surface clean.
The above are the causes and preventive measures for phenomena such as wrinkling, pinholes, and stickiness on the surface of fiberglass products. We hope this information is helpful to everyone. Guangxi Fiberglass Products Co., Ltd. is a professional manufacturer of fiberglass products, and our products are well received by users. We welcome inquiries.
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