As a kind of a large-scale promotion based materials

According to the above standards, mutatis mutandis, the United States if wood and plastic standards and implementation status (only two specific point to wood and plastic material and product standards), home of the existing wood and plastic standard is perfect, but why actual situation but not the desired effect? Released in 2004 and in the implementation of the "LY/T1513 · extrusion wpc deckingplate on several main data, for example, due to its performance testing numerical too low--static music intensity: quartile 20 MPa, bending modulus: frequency 1800 MPa, exterior wear-resisting: g / 100 r than 0.08, hold screw force: frequency 1000 N (board face), so that in the actual application of basic lost detection significance, few enterprise in the actual application with its as quality inspection standard.

 In the state standard of GB/T24137 · wood and plastic board "pointed out that" compound wood "is by the wood or rich in cellulose material as a basis for materials and plastic (also can be a variety of plastic) through the various machining processing technology from the composite materials. Standard not specify "wood or rich in cellulose material" of the proportion of the regulations, no "plastic (also can be a variety of plastic)" the content regulations. Just think if in 99% of the polymer with the 1% of the wooden fiber, does it also can enter the "compound wood" ranks? According to the American association of ASTM of compound wood definition comment, wood and plastic composites and "plastic wood" difference is compound wood must have more than 50% of the wooden fiber (weight ratio, the drying wood fiber content), and should not use "lumber fiber materials and thermoplastics...... in a certain proportion mix" vague expression (the GB/T24508 · wood and plastic floor "), don't set about plant fiber and plastic makings of the proportion of the regulations.

As a kind of a large-scale promotion based materials, wood and plastic industry in a variety of material and product standards (including detection method) is important, but for a long time, people regardless of compound wood/product construction the requirement of the specifications, this must be to say that is a great risk. To Beijing Olympic construction, for example, wood and plastic branch to the 2008 project construction and Beijing the Olympic forest park headquarters on compound wood demonstration project construction in the summary have wrote: the project time, materials comprehensive and construction level and other factors, the conclusion is engineering materials general is fair. Problems may boil down to: improper material, some outdoor composite decking building used indoor material; Poor construction, the work is not meticulous, connection coarse; Wood and plastic materials of low quality (about of the total amount of such a condition is less than 30%).

In the later wood and plastic materials application, the conclusion of objectivity been reflected. In fact, by the so-called in for "Olympic Games wood and plastic material low quality", the biggest problem is the construction standard and not material quality problem. For example, the Olympic forest park in Beijing this year the north and south sides, hundreds of trash can all replaced wood plastic composite material trash can. To this, the engineering management personnel is that, we never denied a wood and plastic materials in application merit, in the past for some problems in the construction, also is not a simple material quality problem.