Along with the rapid development of China's economic development, the demand for wooden raw materials has also been greatly improved, and the key is concentrated in the engineering, furniture, packaging and paper industry. According to the survey, the export volume of wood materials in China in 2003 was about 123.16 million m3, and it still continued to rise. In 2003, imported wood, sawn timber, artificial board, wood pulp and paper and cardboard consumption amounted to 13 billion US dollars, and converted to more than RMB 100 billion yuan. It is the last large-use foreign exchange product of crude oil and steel. I can see the shortage of wood.
Honeycomb polymer materials are used. This is a new material, which is light in weight, high in compressive strength and high in bending stiffness. It has the functions of buffering, vibration isolation, thermal insulation, thermal insulation and sound insulation and noise reduction. It is used in the construction industry, vehicle and ship processing industry, Furniture manufacturing, packaging and transportation industries, replacing wood, soil bricks and high-expanded polystyrene, have high economic development and use value, and can be comprehensively utilized; together, they can save a lot of natural resources, maintain and improve ecological environment protection. It is a new environmental protection material that meets the theme of 21st century development trend.
1. Origin of honeycomb paper
Biologists have discovered that the hexagonal six-sided fossa made by Honey Peak is a work that is constructed in an extremely solid honeycomb shape with at least the raw material cost, and its structure is stronger than anything else. Due to the multi-wall sorting and a series of continuous honeycomb-shaped porous structures, it is possible to disperse the external force acting from multiple parties, and to urge the honeycomb structure against the squeezing work pressure, which is much higher than all rings or squares. Biologists' scientific research on honeycomb structure gives everyone the inspiration that even a very thin raw material can bear a lot of work pressure if it is made into a honeycomb. It is also inspired by the honeycomb, and the honeycomb structure raw materials are just beginning to come out. Honeycomb panels are usually divided into metal materials and non-metal materials. The key to the honeycomb material of metal materials is the airport processing industry, steam turbine generator processing industry, ship processing industry, transportation industry, etc. Honeycomb panels of non-metallic materials are further divided into chemical fibers and paper products. Chemical fiber honeycomb panels are suitable for transportation, interior decoration and furniture industries; paper honeycomb panels are suitable for plastic flexible packaging, building materials industry, furniture industry, etc. Honeycomb paperboard for plastic flexible packaging, ie honeycomb paperboard, is suitable for making wooden boxes and shipping packaging.
2. The basic theory of forming honeycomb paper core
The basic principle of the formation of honeycomb paper core can be demonstrated based on a simple experiment. First, apply a pitch (T), a total width (B), the same number of glue lines on the side of a small strip along the vertical direction of the length of the small strip, and the pitch diameter is the total width of the glue line. 4 times, T = "4B, the same glue line is applied to the other small strip, and then the two small strips are shifted into a composite type, and a hexagonal honeycomb structure can be produced. .
Placed in the shifting adhesive compound type, that is, the glue of the second point of paper is precisely glued on the back of the middle of the first strip of glue (as shown in Figure 1). When the strips are glued together, the small strips are opened horizontally to the symmetry, and several regular hexagons are produced. When the total width and pitch of the glue line are changed (T≠4B), the honeycomb will become a honeycomb of another appearance. When the diameter of the honeycomb inscribed circle is changed, a honeycomb core of a different model size can be obtained. In the specific processing process, more than half of the large honeycomb-shaped paper core is very easy to pull, the production rate can be improved, but the compressive strength is low. Usually in the production of honeycomb trays, honeycomb cores of type b (nominal diameter 15mm) and type C (nominal diameter 20mm) are used, and b type (nominal diameter 15mm) is used in furniture.
3. Current status of application of cellular polymer materials
3.1 A new round of applications in aerospace
Honeycomb structure raw materials began with bionics and were originally used in the aerospace industry. This is an ultra-light polymer material that has evolved in response to the unique necessity of aerospace high-tech. From the beginning of the new century 30 era, the hexagonal aluminum honeycomb core used to produce the structure of the airport, to the Boeing 747 airport of the 70th century, the new round of non-metallic honeycomb sandwich panels. As the wooden floor of the airport, honeycomb polymer materials have been widely used in airline spacecraft such as airports, rockets and spaceships.
3.2 Application of Honeycomb Polymer Materials in Engineering Construction and Furniture
3.2.1 Application in engineering buildings
On the civilian level, the honeycomb composite sheet is a composite sheet made of a too thin artificial board, cardboard and a recycled paper honeycomb core. It is suitable as a raw material for partitions, such as honeycomb-type raw materials, composite lightweight wall panels, and honeycomb core panels only occupy 1 to 5% of the solid core raw materials. For example, the patented technology that has been developed – QD-SXZ Honeycomb Gypsum Board (Patent No. ZL002164000, won the Shanghai Science and Technology Achievement Award.), is this kind of lightweight concrete, heat insulation, heat insulation, sound insulation, noise reduction, flame retardant Slim, non-toxic and easy to install new engineering building decorative panels, can be widely used in engineering construction, decoration, warehousing logistics, transportation, transportation, agriculture and animal husbandry, film and television props and other industries. In the Western countries, honeycomb composite panels have produced a series of standards in the engineering and construction industry, turning into key raw materials with high quality, simple and unique structure, saving resources and power energy.
3.2.2 Application on furniture
The marketing and application of honeycomb polymer materials in the furniture manufacturing industry will greatly reduce the demand for wood and improve the defects of artificial sheet deformation. Take a 20mm thin plate as an example. If a 2.5mm MDF is used as the control panel to make a honeycomb sandwich panel, the amount of raw materials used and the net weight are only 1/4 of the solid core MDF; and the sandwich panel The cost can only be 1/2 of the solid board, and the sandwich panel has the advantages of being light, not easy to deform, and convenient to transport. Therefore, in Europe, about 80% of the inner door is a honeycomb composite door, and most of the 20mm thin solid wood panels are honeycomb sandwich panels.
Honeycomb sandwich panels are suitable for use in custom furniture. For example, it can be used with side plates, control panels, cast-in-place plates, baffles, bottom plates, door frames, decorative partitions and some decorative parts with a thickness of more than 18 mm. The thicker the board, the more the information shows the advantages of the honeycomb raw material; the thick steel plate also has excellent bending strength characteristics for the dining table, tea table, TV cabinet and so on. There are also furniture manufacturers who use it to produce the supporting legs of furniture, and see the richness of its application.
At this stage, in Guangzhou alone, furniture companies have used more than 200 honeycomb paper cores. Many well-known furniture companies in China, such as Fuyun, Company, Haworth, Hörmann, Wanlibao, Dynasty, Fuyu, Da Fuhao, Gaofan, Haorong, Xinnantian, Fudebao of Zhejiang Province and all-friends of Sichuan Province have already used honeycomb paper core to make some furniture spare parts; others also include some IKEA OEM factories. However, relative to all home improvement industries, there are still very few companies that use honeycomb paper core to manufacture furniture, and there is still a large sales market that needs to be developed.
In the Hong Kong sales market, high-quality honeycomb raw materials are used to form high-end panels, and high-end furniture is very popular. The customer calls it “airport wood”. Going to the Japanese sales market, family women are very appreciative of the lightness of cellular furniture, and many Japanese customers have clearly pointed out that they want to buy honeycomb furniture.
3.2.3 Application of new technology on furniture
Traditionally, the application of honeycomb panels in the manufacture of furniture has been based on the use of structured honeycomb panels. I don’t know that at the Hannover Fair in May 2005, the French IMA company has exhibited for many years of research and development results – lightweight concrete unstructured honeycomb The board automatic edge banding machine makes this new high-efficiency and low-cost lightweight concrete unstructured honeycomb board edge processing process become a will, opening up new ideas in the production of furniture using paper-based honeycomb raw materials. , methods and market prospects, which enable honeycomb paper manufacturing furniture to maintain industrial development, modernization and automation technology.
The production process of new lightweight concrete unstructured honeycomb panels is this modern process. It adopts the production and processing technology of slate (4′×8′, ie 1220mm×2440mm), which is to make the unstructured slab honeycomb panel first. The specific measures are given: after the 4 sheets of 4' x 8' high-density fiberboard of 3 mm thick are covered by the rubber, the 4' x 8' honeycomb paper which has been solved by the pull is clamped in the middle. Subsequently, the 4'×8' multi-layer slabs of such well-organized embryos are fed into a jigsaw machine for pressing, and after pressing, an electronic cutting saw or a cutting machine is used to carry out sawing exceeding the necessary specifications. This type of lightweight concrete has no structural honeycomb panels, and there is no structure around. The unstructured honeycomb panel automatic edge banding machine manufactured by the French company Yima has carried out the edging of the decorative point decorative strips and the decorative design strips. Furniture panels. There are many advantages to comparing the new lightweight concrete unstructured honeycomb panels with the structured honeycomb panels. The manufacturing process of the structure is complicated, the artificial service is used at a large level, and the quality of the hazard due to the accuracy of the structure is not stable, and such a process cannot be mass-produced to produce an industrial production scale. The frameless new technology and new technology can produce a large number of professionally produced furniture panels of different specifications. Moreover, such honeycomb panels have the same tensile strength and crush resistance as the same thick plywood. The introduction and popularization of new lightweight concrete unstructured honeycomb panels in Europe will also cause harm to our country's equipment industry. In the production and manufacture of furniture, it is necessary to use different thickness of furniture components, which can be made of different thickness and thickness of light-weight concrete unstructured honeycomb slate according to the use of different thickness of honeycomb paper, and then it is necessary to cut through various materials. Specifications of slabs.