Common problems and treatment methods of FRP production



Gelcoat wrinkle skin, the formation of the cause: gelcoat curing insufficient to carry out the next step of work, solution: according to the environmental temperature and humidity, adjust the formula, fully solidified after the construction

1, gelcoat layer wrinkle skin

Formation reason: Gelcoat curing insufficient to carry out the next work

Solution: According to the ambient temperature and humidity, adjust the formula, solidify fully before construction

2. Uneven color

Formation reason: color paste has expired or stratification, color paste after adding uneven mixing.

Solution: Before the use of color paste, fully stir, after adding resin should also be fully stirred.

3, the surface layer has debris

Formation reason: by soot, dust, insect pollution

Solution: Keep the operation place clean and clean

4, the product surface sticky

Formation reason: resin does not contain enough wax

Solution: Add wax liquid to resin.

Formation reason: mixed with other water or other solvents

Solution: Clean the operating place and tools, and try not to add solvent in the resin.

Formation reason: insufficient addition of cobalt water and curing agent

Solution: appropriate increase cobalt water, methyl ethyl ketone amount

5, serious glue flow

Formation reason: insufficient addition of cobalt water and curing agent

Solution: appropriate increase cobalt water, methyl ethyl ketone amount

Formation reason: resin viscosity is too small

Solution: Appropriate amount of thixotropic agent can be added

6. Product stratification

Formation reason: glass cloth quality is poor or wax

Solution: dewaxing treatment or replacement of glass cloth.

Formation reason: improper operation, too much resin or too little

Solution: The use of defoaming stick carefully operated, so that the resin content is uniform

7, more bubbles

Formation reason: improper selection of glass cloth

Solution: Use suitable glass cloth

Formation reason: resin viscosity is too large

Solution: Add proper amount of styrene, adjust viscosity, roll with a stick.

Formation reason: excessive amount of resin

Solution: appropriate control of glue content

8. The product is white

Formation reason: resin mixed with water or damp.

Solution: Pay attention to resin storage conditions: glass cloth drying before construction.

Cause: The operating environment humidity is too high.

Solution: Control the ambient temperature and humidity.

9. Burnt product

Formation reason: the product is too thick

Solution: The thickness of disposable molding products is controlled below 10mm

Cause of formation: curing is too intense

Solution: Reduce the amount of accelerant

10, poor curing

Formation reason: the amount of curing agent, accelerator is too small

Solution: increase the amount of accelerant and curing agent

Formation reason: the activity of curing agent is too poor

Solution: Replace the curing agent

Formation reason: curing agent is not mixed well

Solution: Stir the ingredients thoroughly

Formation reason: glass cloth water too much

Solution: Use glass cloth after baking

11. Uneven thickness

Cause: The glass cloth is not laid properly

Solution: Focus and practice carefully

Formation reason: too much resin, glass cloth shift

Solution: Control the amount of glue

12. Product warping

Formation reason: product area is too large

Solution: appropriate reinforcement

Cause of formation: incomplete release after curing

Solution: Release the mold after the product is cured

13, product deformation

Formation reason: mold deformation

Solution: Repair and correct the mold

Cause: improper placement after demoulding

Solution: Use bracket to support the product after demoulding

14. Local contraction

Formation reason: local resin too much

Solution: Do not let the corner, groove resin stagnation too much

Formation reason: local thickness is too large

Solution: The product solidifies fully and then stiffens

15. Demoulding is difficult

Formation reason: mold design

Solution: Mold design as far as possible to avoid right angles

Formation reason: curing agent, promoting dose is insufficient

Solution: extend demoulding time

Cause of formation: no release agent applied or poor release agent used

Solution: Use a better release agent

Formation reason: resin mold is not suitable for: mold has hard mold, soft mold, such as: S30127 is not suitable for hard mold

Solution: Choose suitable mold