Laminate inspection


The specifications for decorative laminates and the corresponding test methods are issued by NEMA. They include thickness, wear, scratches, impact, dimensional changes, resistance to boiling water, staining, heat and light. In addition to the NEMA test method, each laminate has a series of more or less specialized side inspection methods to set the others. These include application-related inspection methods such as tool wear and stress cracking.
When processing veneers (decorative laminates), the cutting tools must be sharp, otherwise the trimeric limbs will have burrs. Operators have experienced very different productivity caused by slow tooling when processing different batches of laminates. At the time, the production schedule was not completed due to excessive downtime caused by tool changes. The initial investigation was to use the pigment used for finishing paper as a suspect. Although the measures were taken to improve the use of less abrasive pigments, this problem (although not serious) remains unresolved. Later, attention was transferred to the sand in the core paper. An additional troublemaker was discovered. The detection of the core paper composition and the silicon content is useful in identifying the troubles that paper can cause. However, the correlation between these inspection sides and field performance is not very good.
Obviously, the size and composition of the mineral particles present is important to determine the rate at which the tool wears. Better correlation can be obtained by subjecting the finished laminate to a standardized cutting procedure. The actual amount of wear of the cutting tool can be estimated under the microscope.
Stress cracking was observed around the veneer cut. This rupture is caused by stress, which is caused by a large change in the relative humidity around. A common method for detecting the tendency of laminate damage in this case is to use a 1.2 m X 1.2 m sample. The sample is first set at high humidity and then attached to a dry plywood substrate. Open a 0.3 m square cut in the center of the composite panel. The plate is then placed in a dry box and the cracking at the corners of the cut is periodically observed. The longer the interval before the crack occurs, the less the tendency for stress to break. In recent years, a series of less complex and more mature detection methods have been developed to make detection easier to implement.

  • 09/01/2019
  • Recently
Click here to view Previous or Next

Related News

Cost-effective industrial laminate

Cost-effective industrial laminate

  • 13/02/2019 09:10:01

The cheapest industrial laminates (Class X) are used in large quantities where the dielectric properties are less important. It is made from unbleached kraft paper and about 30% phenolic resin. It has …

Read more

Casting PA film and production technology

Casting PA film and production technology

  • 21/12/2017 09:33:12

Casting PA film and production technology 1. Casting PA film and its raw materials used: PA film has the advantages of high strength, good toughness, good transparency, good heat resistance and cold…

Read more

Cast film mechanical winding device

Cast film mechanical winding device

  • 19/12/2017 09:21:48

Cast film mechanical winding device Corona treatment device: cast film after corona treatment, can improve the surface tension of the film to improve the printing of the film and together with other…

Read more

Downstream production line auxiliaries

Downstream production line auxiliaries

  • 18/12/2017 09:42:18

Downstream production line auxiliaries Thickness measurement device: In the high-speed continuous production process, cast film thickness measurement must be non-contact automatic tracking. Most o…

Read more

Hot News

Extrusion coating

Extrusion coating

Extrusion coatingExtrusion coating refers to a method of combining two rolls of film-form substrate with an extruded molten film as a binder. It is divided into single mode, tandem type, co-extrusion type, and sandwich extrusion coating.Extrusion compound

Film composite technology

Film composite technology

Film composite technologyMulti-layer composite film or film and aluminum foil, paper multi-layer composite material, in terms of air barrier properties, heat sealability, printability, peel strength, hygiene and economic rationality, there is a significan

Calendered film and hard sheet

Calendered film and hard sheet

Calendered film and hard sheetCalendering is a method in which a thermoplastic film of two or more phases is compression molded between rotating rolls to produce a continuous film or sheet.In the field of plastic processing, the extrusion method is the ma

Extrusion theory and characteristics of extrusion

Extrusion theory and characteristics of extrusion

The flow theory of plastics in the extrusion process: The modern ordinary extrusion theory is based on the three basic functions of solid transportation, melting and melt transportation. Thus, a conventional screw includes three functional segments: a sol

Thermoforming of plastics

Thermoforming of plastics

Thermoforming of plasticsThermoforming is a method of making plastic articles using sheets of thermoplastics as a raw material. When manufacturing, the sheet cut into a certain size and a fixed shape is first clamped on the frame and heated to a thermoela

Tags