Production Defects and Solutions of Fireproof boards HPL

Production Defects and Solutions of Fireproof boards HPL

Suggestions: 1. Causes of local white flowers on board surface: 1. insufficient glue content in surface paper or local resin curing in drying 2. too low volatile content in surface paper 3. uneven hot-pressing pressure 4.

1. There are white flowers on the surface of the board.

Reasons for this:

1. Local resin curing in surface paper with insufficient gum content or in drying

2. Low Volatile Content of Surface Paper

3. Hot-pressing pressure non-uniformity

4. Inelasticity of cushion materials

5. Stainless steel plate shows unevenness

6. The resin reacts too old, the molecule is too big and the fluidity of the resin is high.

Solutions:

1. Increase the resin content of surface paper or control the drying temperature to prevent local resin curing.

2. Increasing the Volatile Compound Content of Surface Paper

3. Maintenance of hot press to improve uniformity of pressure surface

4. Regular replacement of cushion materials

5. Regular polishing of stainless steel plate

6. Resin should be analyzed and tested, and should be discontinued when unqualified indicators are required.

2. There are wet flowers (water vapor) on the board surface, and the edge is more serious.

Reasons for this:

1. The volatile content of dipping paper is too high after drying.

2. Inappropriate solvents for printing wood-grain inks or dyes

3. Hygroscopicity (moisture regain) of film paper after dipping and drying

Solutions:

1. Reducing the Volatile Compound Content of Dipping Paper after Drying

2. Solvents for Transferring Inks (Dyes)

3. Pay attention to the storage of film paper, which can be covered with plastic cloth.

3. Surface cracking of decorative board

Reasons for this:

1. The resin reacts too tenderly and the molecule is too small.

2. Incomplete curing of resin

3. The glue content of surface film paper is too high.

Solutions:

1. Discontinuation of unqualified resins

2. Appropriate increase of hot pressing temperature or prolongation of hot pressing time

3. Controlling the Glue Content of Surface Film Paper

IV. Decoration Panel Layering

Reasons for this:

1. The volatile content of the film paper is too low, and the film paper cures locally when it is dried.

2. Insufficient resin content in film paper

3. Low pressure or insufficient hot pressing time

4. Impurities between film paper

Solutions:

1. Control volatile content should not be too low, drying temperature should not be too high, time should not be too long, prevent local curing of resin.

2. Improving the glue content of film paper

3. Increasing pressure appropriately and prolonging heating time

4. Pay attention to the sundries when laying moulds

V. Warpage of Decoration Board

Reasons for this:

1. Inhomogeneous thickness of tissue components of various base papers

2. The adhesive content of film paper is not uniform and the pressure is not uniform everywhere.

3. Failure to cool sufficiently after heat preservation during pressing

Solutions:

1. All kinds of base paper should meet the technological requirements.

2. Keep the resin concentration uniform and adjust the clearance of extrusion roller

3. Cooling below 50 degrees for pressure relief+

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