Plate purchase
2023-04-09 02:08:39
The purchase of plywood plywood is a laminate of criss-cross plates of multi-layer veneers. The outermost front panel is called the panel, and the opposite is called the backplane. The inner plate is called a core plate. In order to eliminate the anisotropy of wood and increase the strength, it is necessary to observe the following when manufacturing plywood: First, the principle of symmetry, the thickness of the veneer in the symmetrical layer, the species of tree, the moisture content, the grain direction, and the manufacturing method are all the same so that various internal stresses can be achieved. balance. The second is the principle of odd numbers. There are three plywood, five plywood and seven, nine, eleven plywood and so on.
Classification of Plywood A type of plywood is weather-resistant, boiling water-resistant plywood, and thus has the advantages of durability, high temperature resistance, and steam treatment.
The second type plywood is a water-resistant plywood that can be impregnated in cold water and impregnated with hot water for a short time.
The three types of plywood are moisture-resistant plywood, which can be impregnated in cold water for a short time and is suitable for use at room temperature. Used for furniture and general construction purposes.
The four types of plywood are non-moisture-resistant plywood, which are used under indoor normal conditions. The general-purpose plywood materials include beech, eucalyptus, ash, birch, eucalyptus, and poplar.
Plywood purchase notes:
Pick wood grain. When purchasing multiple pieces of plywood, plywood with a wood grain and similar color should be selected.
There must be no dead festival or patches on the front;
The number of horny joints (live joints) is less than 5 and the area is less than 15 mm2;
No obvious discoloration and chromatic aberration; no dense hairline cracking phenomenon and cracks exceeding 200mm × 0.5mm;
Less than 5 holes less than 2 mm in diameter;
Resin vesicles with a length of 15 mm and less than 4 black squashes per square metre; Resin drips with a length of l50 mm and a width of 10 mm are less than 4 per square metre;
No deterioration and deterioration.
Fiberboard fiber board is selected to use wood or vegetable fiber as the main raw material, the mechanical separation into a single fiber, adding additives made of slabs, by hot pressing or adhesive composition into wood-based panels. The thickness is mainly 3, 4 and 5 mm. Since the fiberboard has been treated with water repellent, its hygroscopicity is smaller than that of wood, and its shape stability and antibacterial property are all better.
Fiberboard classification
1. Classified by raw materials: wood fiberboard, non-wood fiberboard.
2. According to treatment methods: special hard fiberboard, ordinary hard fiberboard.
3. According to the weight density classification: hard fiberboard (also known as high-density fiberboard), semi-hard fiberboard (also known as medium-density fiberboard), soft fiberboard (also known as low-density fiberboard).
Fibreboard purchase considerations:
Uniform thickness, flat surface, smooth, no stains, water stains, adhesive tracks. The surface of the board is fine, strong, and free from burrs.
Low moisture content, low moisture absorption.
Can hit the board surface by hand, sound crisp and sweet, uniform fiber board quality is better. If the sound is boring, you may have problems with loose glue.
Blockboard (Daixin) The optional blockboard is composed of small wooden strips of varying lengths, which are laminated on one or two layers of plywood or other veneer, and then pressed. The core board is commonly used for pine, cassia, eucalyptus, eucalyptus and other wood.
Blockboard purchase notes:
1. Blockboard is divided into one, two, three and so on. Directly decorated panels, should use a first board, only as a floor with the third-class board available.
2. Pick a board with a smooth surface, a few knots, and a few clips.
3. Check the veneer quality and density of the core board from the side or sawed section.
4. One side of the big core board must be a whole board, and only one seam is allowed on the other side. In addition, the surface of the large core board must be dry and clean.
5. When selecting the blockboard, be sure to select the machine's puzzle and do not use hand-made puzzles.
6. Observe whether there is any glue and putty phenomenon around it.
7. Sharply tap the surface of the device to hear if there is a big difference in the sound, if there is a change in the sound, there is a hollow inside.
8. When purchasing in bulk, check the quality inspection documents and quality inspection certificates.
Plywood to buy decorative veneer veneer plywood (abbreviated as decorative plate) market, said "plywood", ash plywood commonly known as "curtain", plywood veneer commonly known as "plywood". Decorative panels are commonly used decorative materials for home decoration. Choosing high-quality decorative plates will make the living room sparkle with its stable and sturdy structural decoration. In case consumers choose inferior decorative plates, the surface will bulge and crack. In fact, the purchase of decorative panels is still a rule to follow: 1. Recognize the difference between artificial veneer veneer and natural wood veneer veneer: the texture of the former is basically a straight texture, texture patterns have rules; the latter is natural wood Patterns, patterns of natural and cultural variability are relatively large and irregular. 2. Appearance inspection, good decorative effect: The appearance of the decorative board should have a good sense of beauty, the material should be detailed and uniform, and the color should be clear. The wood grain is beautiful, and the texture of the matching board and the parquet should be arranged according to certain rules. The wood color is similar, and the patchwork is almost parallel to the edge of the board. 3. The surface should be free of obvious flaws: The surface of the decorative board chosen should be smooth, free from burr groove marks and planer marks; there should be no phenomenon of glue penetration and board surface contamination (such as local yellowing and blackening); Cracks cracks, no knots, sandwiches, resin capsules and gum lanes; the natural warpage of the entire board should be as small as possible to avoid sand penetration phenomena due to improper sanding process and substrate. 4. The adhesive layer structure is stable and there is no open glue phenomenon: it should be noted that there should be no bulging or delamination between the surface veneer and the substrate and between the internal layers of the substrate. 5. Testing the glue strength with the swathe method: This method is the most intuitive method to test the gluing strength. It is slid along the glue layer with a sharp flat blade. If the adhesive layer is damaged, it indicates that the bonding strength is poor. 6. To choose a sheet with a low formaldehyde emission: When choosing a decorative sheet with a pungent odor, avoid it. Because the greater the odor, the higher the amount of formaldehyde released, the greater the pollution, the greater the danger. 7. Choose products with clear production companies: Most of them have products with clear factory names, factory sites, and trademarks, and they have good performance.
How to choose a large core board, also known as blockboard, can be used for almost every home improvement project. The quality of the Daxin board also has a direct influence on the effect of the decoration. Here are some issues to be noted when picking Daxin board.
First, the best choice for machine puzzles. The middle sandwich of the big core board is made of solid wood. There are two kinds of manual assembly and machine assembly when the production is made. The joints of the boards assembled by the machine are more uniform.
Second, the board seam is best not more than 3 mm. The smaller the wooden spacing of the middle splint is, the better, the maximum can not exceed 3 mm, and a section of board can be sawed during inspection.
Third, the material of the middle sandwich is preferably poplar and pine, not hardwood, because hardwood does not "eat nails."
Fourth, the surface sand. The high-quality large core board uses double-sided sanding and feels very smooth when touched.
Fifth, the moisture content. The moisture content of wood in Beijing should be 8% to 12%. The high-quality large core board is steam dried and the moisture content can reach the standard. The moisture content of poor quality large core boards often does not meet the standard.
Sixth, environmental protection indicators. Daxinban is compounded with glue. The composition of the glue is mainly formaldehyde and its content should be less than 50 mg/kg. There are a small number of brands, the glue is non-formaldehyde, its formaldehyde content is fully up to standard.
Look at the surface of the high quality blockboard should be smooth. No defects, such as dead knots, digging, leaking glue, etc., the thickness of the middle plate is uniform, there is no overlap, from the joint phenomenon, the core section of the knot is tight, in particular, both ends of the blockboard can not have dry crack phenomenon. The entire package of blockboards should fit completely between each board.
Touch the surface of the blockboard with your hands. The high-quality blockboard should be dry and smooth.
Sanhe lifted one end of the blockboard and squatted it. The high-quality blockboard should have a sense of integrity and heavyness. Of course, this heavy induction is a good thing when it feels dry. After the above-mentioned process, you can roughly determine the advantages and disadvantages of blockboards. Basically, if you fail to meet the above criteria on the one hand, the price will be reduced by one level. According to their own situation, consumers can choose the block board with the appropriate quality price to meet the needs of decoration.
How to choose a fire board?
Fireproof board is a kind of advanced new composite material, also called high-pressure decorative refractory board. Because the back is very similar to wood material, some people think that it is made of natural wood, but it is not true. The fireproof board is made of kraft pulp with the addition of a blending agent, flame retardant and other chemical raw materials through high-pressure synthesis. Fire board is divided into four layers from the back to the surface, followed by: adhesive layer, base layer, decorative layer, protective layer. Among them, the adhesive layer and the protective layer have the greatest impact on the quality of the fire board, and also determine the grade and price of the fire board.
When choosing a fire board, pay attention to its thickness. The thickness of the fireproof board is generally 0.6-1.2mm, and the general veneer selection is 0.7-1mm thick. Also pay attention to the appearance of the fire board (visual inspection no more than 1 meter) and wear, radiation resistance, dimensional stability, blistering time and other technical indicators. The fire-resistant board's resistance to boiling water, high temperature, and pollution resistance are generally in line with requirements. There are few quality issues.
Line type material selection Line type material is used in the decoration project in a variety of flat surface, intersecting surface, interface, level surface, docking surface of the convergence of the interface and the interface of the closing edge sealing material. It mainly consists of various hardwood lines, carved wooden lines, Italian-style decorative patterns, stone lines, copper lines and stainless steel lines.
Ordinary wood lines can be painted into a variety of colors and wood grain colors, can be docking and splicing, as well as bending into a variety of arcs. Wood lines can be used in roof lines, ceiling corners and wall lines. The wood line specification generally refers to the maximum width and maximum height, and the common length is 2 to 5 m.
Carved wood lines It is commonly used wood high-grade white wood, beech wood, tying wood, maple and oak, the type of Western European style, and its expensive, mostly used in high-end Western-style decoration.
Aluminum alloy lines are commonly used for pressure lines, closing lines, and frame borders for decorative surfaces and decorative mirrors on decorative surfaces. Can be used as a sealing line for some devices on the wall or ceiling. It is also used for edge decoration on furniture, push-pull slots for glass doors and closing lines for carpets.
The copper line is mainly used for the ground marble, granite, terrazzo block line, non-slip line stairs, stepping carpet pressure angle line, high-grade furniture decoration line. Decorative stone lines can be matched with slate materials for high-end decorative wall pillars, stone door covers, stone shapes and other places and parts.
Classification of Plywood A type of plywood is weather-resistant, boiling water-resistant plywood, and thus has the advantages of durability, high temperature resistance, and steam treatment.
The second type plywood is a water-resistant plywood that can be impregnated in cold water and impregnated with hot water for a short time.
The three types of plywood are moisture-resistant plywood, which can be impregnated in cold water for a short time and is suitable for use at room temperature. Used for furniture and general construction purposes.
The four types of plywood are non-moisture-resistant plywood, which are used under indoor normal conditions. The general-purpose plywood materials include beech, eucalyptus, ash, birch, eucalyptus, and poplar.
Plywood purchase notes:
Pick wood grain. When purchasing multiple pieces of plywood, plywood with a wood grain and similar color should be selected.
There must be no dead festival or patches on the front;
The number of horny joints (live joints) is less than 5 and the area is less than 15 mm2;
No obvious discoloration and chromatic aberration; no dense hairline cracking phenomenon and cracks exceeding 200mm × 0.5mm;
Less than 5 holes less than 2 mm in diameter;
Resin vesicles with a length of 15 mm and less than 4 black squashes per square metre; Resin drips with a length of l50 mm and a width of 10 mm are less than 4 per square metre;
No deterioration and deterioration.
Fiberboard fiber board is selected to use wood or vegetable fiber as the main raw material, the mechanical separation into a single fiber, adding additives made of slabs, by hot pressing or adhesive composition into wood-based panels. The thickness is mainly 3, 4 and 5 mm. Since the fiberboard has been treated with water repellent, its hygroscopicity is smaller than that of wood, and its shape stability and antibacterial property are all better.
Fiberboard classification
1. Classified by raw materials: wood fiberboard, non-wood fiberboard.
2. According to treatment methods: special hard fiberboard, ordinary hard fiberboard.
3. According to the weight density classification: hard fiberboard (also known as high-density fiberboard), semi-hard fiberboard (also known as medium-density fiberboard), soft fiberboard (also known as low-density fiberboard).
Fibreboard purchase considerations:
Uniform thickness, flat surface, smooth, no stains, water stains, adhesive tracks. The surface of the board is fine, strong, and free from burrs.
Low moisture content, low moisture absorption.
Can hit the board surface by hand, sound crisp and sweet, uniform fiber board quality is better. If the sound is boring, you may have problems with loose glue.
Blockboard (Daixin) The optional blockboard is composed of small wooden strips of varying lengths, which are laminated on one or two layers of plywood or other veneer, and then pressed. The core board is commonly used for pine, cassia, eucalyptus, eucalyptus and other wood.
Blockboard purchase notes:
1. Blockboard is divided into one, two, three and so on. Directly decorated panels, should use a first board, only as a floor with the third-class board available.
2. Pick a board with a smooth surface, a few knots, and a few clips.
3. Check the veneer quality and density of the core board from the side or sawed section.
4. One side of the big core board must be a whole board, and only one seam is allowed on the other side. In addition, the surface of the large core board must be dry and clean.
5. When selecting the blockboard, be sure to select the machine's puzzle and do not use hand-made puzzles.
6. Observe whether there is any glue and putty phenomenon around it.
7. Sharply tap the surface of the device to hear if there is a big difference in the sound, if there is a change in the sound, there is a hollow inside.
8. When purchasing in bulk, check the quality inspection documents and quality inspection certificates.
Plywood to buy decorative veneer veneer plywood (abbreviated as decorative plate) market, said "plywood", ash plywood commonly known as "curtain", plywood veneer commonly known as "plywood". Decorative panels are commonly used decorative materials for home decoration. Choosing high-quality decorative plates will make the living room sparkle with its stable and sturdy structural decoration. In case consumers choose inferior decorative plates, the surface will bulge and crack. In fact, the purchase of decorative panels is still a rule to follow: 1. Recognize the difference between artificial veneer veneer and natural wood veneer veneer: the texture of the former is basically a straight texture, texture patterns have rules; the latter is natural wood Patterns, patterns of natural and cultural variability are relatively large and irregular. 2. Appearance inspection, good decorative effect: The appearance of the decorative board should have a good sense of beauty, the material should be detailed and uniform, and the color should be clear. The wood grain is beautiful, and the texture of the matching board and the parquet should be arranged according to certain rules. The wood color is similar, and the patchwork is almost parallel to the edge of the board. 3. The surface should be free of obvious flaws: The surface of the decorative board chosen should be smooth, free from burr groove marks and planer marks; there should be no phenomenon of glue penetration and board surface contamination (such as local yellowing and blackening); Cracks cracks, no knots, sandwiches, resin capsules and gum lanes; the natural warpage of the entire board should be as small as possible to avoid sand penetration phenomena due to improper sanding process and substrate. 4. The adhesive layer structure is stable and there is no open glue phenomenon: it should be noted that there should be no bulging or delamination between the surface veneer and the substrate and between the internal layers of the substrate. 5. Testing the glue strength with the swathe method: This method is the most intuitive method to test the gluing strength. It is slid along the glue layer with a sharp flat blade. If the adhesive layer is damaged, it indicates that the bonding strength is poor. 6. To choose a sheet with a low formaldehyde emission: When choosing a decorative sheet with a pungent odor, avoid it. Because the greater the odor, the higher the amount of formaldehyde released, the greater the pollution, the greater the danger. 7. Choose products with clear production companies: Most of them have products with clear factory names, factory sites, and trademarks, and they have good performance.
How to choose a large core board, also known as blockboard, can be used for almost every home improvement project. The quality of the Daxin board also has a direct influence on the effect of the decoration. Here are some issues to be noted when picking Daxin board.
First, the best choice for machine puzzles. The middle sandwich of the big core board is made of solid wood. There are two kinds of manual assembly and machine assembly when the production is made. The joints of the boards assembled by the machine are more uniform.
Second, the board seam is best not more than 3 mm. The smaller the wooden spacing of the middle splint is, the better, the maximum can not exceed 3 mm, and a section of board can be sawed during inspection.
Third, the material of the middle sandwich is preferably poplar and pine, not hardwood, because hardwood does not "eat nails."
Fourth, the surface sand. The high-quality large core board uses double-sided sanding and feels very smooth when touched.
Fifth, the moisture content. The moisture content of wood in Beijing should be 8% to 12%. The high-quality large core board is steam dried and the moisture content can reach the standard. The moisture content of poor quality large core boards often does not meet the standard.
Sixth, environmental protection indicators. Daxinban is compounded with glue. The composition of the glue is mainly formaldehyde and its content should be less than 50 mg/kg. There are a small number of brands, the glue is non-formaldehyde, its formaldehyde content is fully up to standard.
Look at the surface of the high quality blockboard should be smooth. No defects, such as dead knots, digging, leaking glue, etc., the thickness of the middle plate is uniform, there is no overlap, from the joint phenomenon, the core section of the knot is tight, in particular, both ends of the blockboard can not have dry crack phenomenon. The entire package of blockboards should fit completely between each board.
Touch the surface of the blockboard with your hands. The high-quality blockboard should be dry and smooth.
Sanhe lifted one end of the blockboard and squatted it. The high-quality blockboard should have a sense of integrity and heavyness. Of course, this heavy induction is a good thing when it feels dry. After the above-mentioned process, you can roughly determine the advantages and disadvantages of blockboards. Basically, if you fail to meet the above criteria on the one hand, the price will be reduced by one level. According to their own situation, consumers can choose the block board with the appropriate quality price to meet the needs of decoration.
How to choose a fire board?
Fireproof board is a kind of advanced new composite material, also called high-pressure decorative refractory board. Because the back is very similar to wood material, some people think that it is made of natural wood, but it is not true. The fireproof board is made of kraft pulp with the addition of a blending agent, flame retardant and other chemical raw materials through high-pressure synthesis. Fire board is divided into four layers from the back to the surface, followed by: adhesive layer, base layer, decorative layer, protective layer. Among them, the adhesive layer and the protective layer have the greatest impact on the quality of the fire board, and also determine the grade and price of the fire board.
When choosing a fire board, pay attention to its thickness. The thickness of the fireproof board is generally 0.6-1.2mm, and the general veneer selection is 0.7-1mm thick. Also pay attention to the appearance of the fire board (visual inspection no more than 1 meter) and wear, radiation resistance, dimensional stability, blistering time and other technical indicators. The fire-resistant board's resistance to boiling water, high temperature, and pollution resistance are generally in line with requirements. There are few quality issues.
Line type material selection Line type material is used in the decoration project in a variety of flat surface, intersecting surface, interface, level surface, docking surface of the convergence of the interface and the interface of the closing edge sealing material. It mainly consists of various hardwood lines, carved wooden lines, Italian-style decorative patterns, stone lines, copper lines and stainless steel lines.
Ordinary wood lines can be painted into a variety of colors and wood grain colors, can be docking and splicing, as well as bending into a variety of arcs. Wood lines can be used in roof lines, ceiling corners and wall lines. The wood line specification generally refers to the maximum width and maximum height, and the common length is 2 to 5 m.
Carved wood lines It is commonly used wood high-grade white wood, beech wood, tying wood, maple and oak, the type of Western European style, and its expensive, mostly used in high-end Western-style decoration.
Aluminum alloy lines are commonly used for pressure lines, closing lines, and frame borders for decorative surfaces and decorative mirrors on decorative surfaces. Can be used as a sealing line for some devices on the wall or ceiling. It is also used for edge decoration on furniture, push-pull slots for glass doors and closing lines for carpets.
The copper line is mainly used for the ground marble, granite, terrazzo block line, non-slip line stairs, stepping carpet pressure angle line, high-grade furniture decoration line. Decorative stone lines can be matched with slate materials for high-end decorative wall pillars, stone door covers, stone shapes and other places and parts.
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