Flame Retardant MDF Overview and Features Analysis

First, what is a flame retardant MDF, flame retardant MDF

Flame-retardant MDF is based on wood fiber or other plant fibers, applied urea-formaldehyde resin or other suitable adhesive. In the glue-spraying section, the flame retardant is added to the production line just like sizing to make a board with a density in the range of 500-880 kg/m3.

Second, the use of flame retardant density board

Flame retardant density board has good physical and mechanical properties and processing performance, can be made into different thickness of the plate, it is widely used in furniture manufacturing, construction, interior decoration industry, shipbuilding, automotive lamp industry. The flame-retardant medium density fiberboard is a homogeneous porous material with good acoustic properties and is a good material for producing speakers, TV housings, and musical instruments. In addition, it can also be used for ships, vehicles, sports equipment, floors, wall panels, partitions, etc. instead of natural wood. It has the characteristics of low cost, simple processing, high utilization, and more economical than natural wood.

Third, the characteristics of flame retardant density board

Flame-retardant MDF is a man-made board made from the limited use of timber resources, such as branches and twigs, small-diameter materials, thinning materials of fast-growing materials, and bamboo and other plant materials. The comprehensive utilization rate of wood is high, which is in line with China's forestry development policy and is beneficial to China. The implementation of sustainable forestry development strategy. Its main features and performance are:

1. The internal structure is uniform, the density is moderate, the dimensional stability is good, and the deformation is small.

2. The physical and mechanical properties of static bending strength, internal bonding strength, elastic modulus, plate surface and edge gripping screws are better than that of particleboard.

3, the surface smooth, easy to secondary processing, can be affixed to peeling veneer, sliced ​​thin wood, paint paper, impregnated paper, but also directly paint and printing decoration.

4. The flame-retardant density plate has a larger width, and the plate thickness can also be changed within the range of 2.0 to 35 mm. The production can be organized according to different purposes.

5, machining performance, sawing, drilling, drilling, milling, sanding and other processing performance similar to wood, and some even better than wood.

6, easy to sculpture and milling into a variety of profile, shape of the furniture parts, processed into the profiled edge can be directly without paint and other coating processing.

7. Chemical agents such as water repellents, fireproofing agents, and antiseptics can be added to the production process of hard-diffusing MDF boards to produce special-purpose flame-retardant medium-density fiberboards.

Fourth, what are the requirements of the flame retardant MDF?

The performance of the flame retardant density board varies greatly depending on the types of raw materials, manufacturing processes, etc. The flame retardant density boards produced by Beijing Shengdahuayuan Technology Co., Ltd. are classified into superior products, first-class products and qualified products according to the product specifications. Three levels. According to GB/T8625-2005 "Test method for flame retardancy of building materials", it is divided into non-combustible material (Grade A), flame-retardant material (Grade B1), flammable material (Grade B2), flammable material (Grade B3), According to GB8624-2006 "Building materials and products combustion performance rating" is divided into A1 level, A2 level, B level, C level, D level, E level, F level. The mechanical performance indexes specified in the national standards include: static bending strength, internal bonding strength, elastic modulus, plate-side and plate-side holding screw forces, and physical performance indexes: density, moisture content, and water absorption thickness expansion rate. Chemical performance indicators are: formaldehyde emission and so on.

V. Common Problems of Traditional Flame Retardant MDF

Flame-retardant MDF has a high technological content and is a modern industry with high capital and technology intensiveness. The automation level of the production line is relatively high. This product is also one of the more excellent products among the wood-based panel products. The qualified rate of the product is high, but at present There are still some problems, and the quality issues that are commonly reflected are:

1. The surface of the plate is rough and the uniformity is poor, which affects the reprocessing of the plate.

2. The surface of the board is heavily polluted, such as glue spots, oil stains, etc., which affect the re-processing of the board.

3, plate thickness deviation.

4. The bark content of the plate is higher.

5, the water resistance of the plate can not meet the needs of some application areas.

6. The middle layer of the plate is soft, holding the screw force, the internal bonding strength is low, and at the same time it causes the edge of the plate to be rough.

7, excessive formaldehyde emission, affecting personal health.

The above problems are not only the problems in the production of traditional fire retardant MDF in China, but also the gap between China and foreign advanced levels in the past decade or so. In particular, when the formaldehyde emission amount of the flame-retardant MDF is unqualified, furniture made of it or used as an interior decoration material becomes an indoor pollution source and affects personal health. In addition, the uniformity of the surface of the fire retardant density board in China, the cleanliness of the board, the structure of the board, the thickness deviation, and the water resistance performance are different from those of foreign products. The main reasons are: the equipment is not accurate enough, and there is a gap between the automation level, technical level, management level and quality control of the production line and foreign products. This requires that China's medium density industry must continuously improve its technical level, management level and standard level. Super world advanced level.