Quality Standard

 

 

European Standard EN438

 

The European Standard EN438 is one of the standards wholesale nba jerseys that most decorative laminates manufacturers selling to worldwide market adhere to. The specific code is EN438, entitled:
Decorative high-pressure laminates (HPL) sheets based on thermosetting resins, specifications. It replaces the BS3794 standard.

The most common part applies to high-pressure laminates is Part 3 and part 4 which quality standard for interior panel.

EN438 part 3 standard is:
High-pressure decorative laminates (HPL) Sheets based on thermosetting resins (Usually called laminates: Classification and specifications for laminates less than 2 mm thick intended for bonding to supporting substrates.

EN438 part 4 standard is:
High-pressure decorative laminates (HPL) – Sheets based по-русски on thermosetting resins Review, (Usually called Laminates):
Classification and specifications for laminates less than 2 mm thick intended for bonding to supporting substrates.

The test below is explain in EN438 part 2 and the high pressure laminate is comply with standard EN438 part 3 and part 4.

Resistance to Surface Wear
– The test measures the ability of the decorative surface of the laminate under test to resist abrasive wear-through to the sub-layer.

Resistance to Impact by Large Diameter Ball
– A specimen from the laminate under test, bonded to dry process fibreboard, is covered with a sheet of carbon paper and subjected to the wholesale nba jerseys impact of a steel ball which is allowed to fall from a known height.

Resistance to Scratching
– The resistance to scratching of the decorative laminate sheet under test is expressed as a numerical rating which defines the maximum applied load which does not produce a continuous surface scratch.

Resistance to Dry Heat (180°C)
– The test is intended to determine the suitability of decorative laminates for use in kitchens where contact with moderately hot cooking utensils is to be expected.

Resistance to Immersion in Boiling Water
– The effect of immersion in boiling water for 2 h is determined by the increase in mass and thickness of test specimens and by noting any change Pattern in appearance.

Dimensional Stability at Elevated Temperature
– The test measures the lateral dimensional changes of specimens from the laminate under test over an extreme range of relative Finish humidities at elevated temperatures.

Resistance to Staining
– Test specimens are left in contact with a series of staining agents which are likely to be encountered in everyday use. The time and conditions of contact are specified for each staining agent. At the end of the specified contact period, the specimens are washed and examined for residual surface marks.

Lightfastness (Xenon Arc)
– A test specimen taken from the laminate under test is exposed to daylight simulated by the filtered light of one or more xenon arc lamp(s) to High evaluated the effect of daylight on the color of the specimen.

Resistance to Water Vapor
-A specimen from the laminate under test is held in place over the neck of a flask containing boiling water, so that the decorative surface of the specimen is exposed to the water vapor.

Resistance to Cigarette Burns
– A specimen from the sheet under test is bonded to wood chipboard to simulate service conditions, and subjected to the heat from a burning cigarette placed on the surface.

Resistance to crazing
– A specimen from the laminate under test is exposed to dry heat at 80 °C for 20 h and resistance to wholesale mlb jerseys crazing is assessed by visual Fast examination after cooling.