Wood industry knowledge: wooden doors !

Wood industry knowledge: wooden doors !
Wooden door industry terms and definitions
1 wooden doors (Timber Door)
From the wooden materials (sheet, sawn wood, synthetic material etc.) is mainly made of wooden door and frame products.
2 timber sheet (Lumber) \
Wood or wood made of sawn wood, used in the manufacture of solid wood furniture and veneer.
3 (Veneer).
By using different ways of slicing and sawn timber, generally 0.6mm, 0.2mm. Low-grade wooden doors generally use 0.2mm.
4 coating (coating)
Commonly known as paint, divided into water-soluble and solvent soluble. Water solubility is commonly referred to as water-based paint, while the agent soluble paint is commonly known as paint.
Two, wooden door surface technology (paint) classification
1, water-based paint (water coating)
Water-based paint is water diluent, without organic solvent coated wood jewelry, do not contain benzene, toluene and xylene, formaldehyde, and other toxic heavy metals in TDI, non-toxic and non irritating odor, harmless to the human body, does not pollute the environment, paint film, transparent crystal, and has good flexibility, abrasion resistance, aging resistance, water resistance yellowing resistance, fast drying, easy to use.
2, paint (paint) 60/m2
General varieties PU polyurethane, unsaturated resin, PE NC, UV UV curable lacquer paint, polyurethane paint which is widely used in interior decoration, the largest amount of a variety of paint film performance, its tough film, strong adhesion, abrasion resistance, water resistance, chemical corrosion resistance, gloss and color retention is excellent
3, open paint / closed paint 40/m2
Paint finish. The former can see wood texture and pores, the latter can not be. There are closed, semi closed and other differences.
4, color paint (color paint) / varnish (clear paint)
According to whether the paint color classification. The former is to overwrite the original base paint. Color selection, the base material is not very high. The latter is a transparent paint effect, you can see the color and pattern painted. The paint is very high, and the material is very particular.
5, matt paint / bright paint
Paint gloss can be divided into the following categories: Ultra matte, matte, eggshell light (Rou Guang), mercerized (satin), half light (Ban Ya), Gao Guang (Liang Guang). Its gloss from low to high, is divided according to the degree of reflection of light. In oil paint (paint), rare matte, semi matte and high gloss light three, three no grade points, just for different places, such as doors and windows and furniture with a matte or semi matte, while the floor general use of high light, because the average hardness of high gloss is also high. In water-based paint (latex paint), almost all the luster.
Three, wooden doors of the components, internal structure and classification
1 wooden doors each part name
Wooden rails, generally by the stile and door core plate. According to the upper and lower positions, there are more detailed distinction. To take hold as an example, and divided into run, run, run, run under lock etc.. But now because of the design needs of designers, many doors have broken the original structure, so it can not be a word. See below for details.
The name of each part.
Each part of the name.

2 wooden door internal structure
Generally speaking, solid wood composite door structure refers to the structure of the door. At present, there are several structures:
LVL/ shirt wood finger joint Lumber + (MDF + veneer) / sheet
Particleboard veneer +
Honeycomb paper MDF plywood / veneer
3 wooden door classification
(1) by opening mode.
The doors can be divided into the door open manner in accordance with (also called door) (P) (T), sliding door, folding door (Z) and spring (H) four. The fixed part and the door or sliding door combination, flat door or sliding door.
(2) by internal structure classification.
According to the different structure of the wooden doors, wooden doors can be divided into solid wood doors, solid wood composite doors, plywood molded hollow doors.
A) all solid wood doors (solid door):
Outer material and inner material completely unified wooden door. Refers to all having the characteristic of various types of wood, including wood made half glass door and glass door. Wood drying is the key process of solid wood doors.
B) solid wood composite door (laminate door)
Refers to the use of wood, wood-based panels, thin wood veneer and other materials of various solid doors, with the characteristics of material refers to all the doors. The shortage of forest resources, the increasingly prominent contradiction between supply and demand of rare trees, is an effective means of comprehensive utilization of timber. The adoption of veneer technology is the most prominent characteristic of composite door.
C) molded door (mold door)
Plywood, wood as the framework material, the surface of the artificial board or PVC board, such as pressing or molding molding hollow (no support area above 10cm * 10cm) door is called plywood molded hollow door.
(3) according to the classification of the external perception.
In accordance with the appearance, we generally divide the door into a flat door (Plane door), door (panel), etc..
(4) classification by surface coating.
A (paint door): the door is painted on the surface.
(b) paint free door: door without painting. The surface material is generally PVC, Boeing film (imitation wooden posts strong sense of die), melamine (melamine decorative paper).
C) door paint: paint is a kind of surface technology based mdf. Paint the door is divided into piano paint and metal paint.

Four, commonly used wood varieties and characteristics
1 Shabili (Sapele)
Name of cylindrical African spine, commonly known as phantom wood. Of tropical africa. Wood staggered, sometimes with wavy texture, texture with flash and the three-dimensional sense to the luxurious and elegant feeling, with reddish brown color can render decoration places festive, warm atmosphere.
2, cherry (cherry)
Located in the east of the country, cherry color from red to brown heartwood red, dark sun. Cherry has fine straight lines, smooth texture, natural gum containing brown spots and small tree heart nest. Generally used for high-grade interior decoration materials.
3, teak (teak)
In some countries in Southeast Asia, China is also near the border with Yunnan, Thailand, Burma is the most famous, the main species of wood imported from Burma. With a golden sheen, produced in Thailand was the best, bright teak oil, wood uniform color, texture straight. Corrosion resistance, wear resistance, shiny as new, beautiful patterns, colors and elegant looking, good stability, small deformation
4 Black Walnut (Walnut)
Various parts of the eastern United States, but the main commercial forest is located in the central states. The wood is generally straight grained, but sometimes with wavy or curly grain, produces an attractive and decorative figure. Walnut is a medium density tough hard wood, bending strength and fracture strength moderate, is also one of the most durable wood. Furniture, cabinet making, architectural interiors, senior joinery, doors, flooring and panelling. A good wood that is used with a light colored wood to produce contrasting effects.
5 red oak (red oak)
Widely distributed in the eastern part of the United states. The appearance of the red oak and white oak are similar, but because of the smaller rays, less visible graphic. Most of the red oak is straight grain, rough texture. The red oak gets its name because the leaves turn red in autumn. After dyeing and polishing can get a good surface, red oak hard and heavy, with medium bending strength and rigidity.
6 white oak (white oak)
Widely distributed in the eastern part of the United states. White oak is mostly straight grained texture, medium to coarse, pith ray than red oak, white oak, therefore have more graphics. White oak is hard and heavy, the bending strength of medium, low rigidity, heartwood has corrosion resistance, anti-corrosion treatment agent is extremely difficult to penetrate, white wood preservative treatment agent with anti permeability medium.
7 hard maple (hard maple)
Located in the eastern part of the United States, mainly in Atlanta and in Kezhou levin. With dense fine texture, is generally straight grained, but also will appear curved, shaped and bird eye shaped wood arch. Hard maple wood is hard, heavy, has good strength performance, has a very high wear resistance and wear resistance, but also has good resistance to steam bending performance.
8 soft maple (soft maple)
Located in various parts of the eastern United States, West Bank (a small number of big leaf maple). Soft maple most properties are very similar and hard maple. Although the soft maple is widely distributed, the wood color varies greatly with different habitats. The hardness of soft maple is about 25% less than that of hard maple. It has the advantages of moderate bending and breaking strength, low rigidity and low seismic strength, and good resistance to steam bending. No corrosion resistance and insect resistance. Soft maple is often used as a substitute for hard maple, or other wood imitation by staining (such as cherry). The physical properties and processing properties of the can be used as a substitute for beech.
9 beech (beech)
In all parts of Europe. Compared with European beech, American beech color slightly darker, and the consistency is slightly worse. This kind of wood is usually straight grain, and the texture is even and uniform. Drying is fast, but it is prone to warping, cracking and surface cracking. Shrinkage rate, moderate performance changes. The United States is heavy, hard, beech, high strength, strong seismic ability, very suitable for a class of steam bending wood.
10 peach core (mahogany)
Mahogany produced in Indonesia, Brazil, Cuba, China and African countries. Oblique texture, material dense and uniform, moderate hardness, easy carving. Heartwood from reddish brown to dark brown, named mahogany. It is mainly made of high-grade furniture at present, wood is very beautiful, but also have as long as possible. Due to the delicate wood, high hardness, you can do a variety of modeling sculpture, life can be up to several hundred years. In the aristocratic family in Europe, often see the trace of mahogany.

Five, door core material
1 finger jointing material (Finger Jiont wood)
The ground connection method as a kind of wood, except with good connectivity, but also conducive to the stability of wood. General finger materials are pine and fir.
2 plywood / multilayer (Play wood)
Artificial board. The slab with single board gelatinized by grain direction with the arranged in a crisscross pattern in the heating, or heating conditions and pressing. There are three commonly used plywood, plywood etc..
3 MDF (MDF)
Use of Limited wood resources, wood branches, small-diameter fast-growing wood thinning wood and bamboo and other plant materials made of man-made sheet. Smooth surface, easy for two processing.
4 particleboard (Chipboard)
Is a kind of man-made plank of wood processing scrap, wood pressed. Uniform structure, good processing performance, can sheet into large format according to the needs of processing. Don’t need to dry particleboard manufactured goods, can be used directly, sound absorption and sound insulation performance is also very good. But it also has its inherent shortcomings, because the edge of rough, easy moisture absorption; compared to other plates, but also heavier.
5.PVC
PVC is referred to as PVC resin, PVC is a linear thermoplastic polymer. With PVC as the base material, adding plasticizers, stabilizers, pigments, fillers, lubricants, etc.. At a certain temperature, the product is made of plastics by kneading, mixing, pulling, cutting, extruding or casting.
This product is an excellent thermoforming material that can replace parts of stainless steel and other corrosion resistant synthetic materials. Is widely used in chemical industry, petroleum, electroplating, water purification equipment, environmental protection equipment, mining, medicine, electronics, communications and decoration industries.
Six, wooden door detection methods and standards
5, the moisture content of wood door requirements: 6% = = the local equilibrium moisture content
6, wood environmental protection index requirements
Formaldehyde emission should be less than 1.5mg/L;
The content of heavy metals (color paint): soluble lead should be less than 90mg/kg, soluble cadmium should be less than 75mg/kg, soluble chromium should be less than 60mg/kg, soluble mercury should be less than 60mg/kg.

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