Bamboo products in our life is not difficult to see, can be said to be everywhere, some people may think whether bamboo products are really made of bamboo, that can only say that we are still not familiar with bamboo, the following jiangxi bamboo products manufacturers to tell you about the structure of bamboo? What are the physical properties of bamboo?

Structure of bamboo:

The bamboo material used for packaging industrial products is mainly the underground stem of bamboo (commonly known as bamboo rod), which is composed of bamboo (skin), bamboo meat (fiber bundle and basic tissue) and pith. Along the bamboo stem longitudinal at a certain distance there is a ring protruding, known as the bamboo, bamboo branch is born on the node. Bamboo joints can increase the stiffness of bamboo stems. Between the two bamboo called internodes, near the ground part of the shortest internodes. The bundle of fibers is the main part of the bamboo material, which is a channel for transferring water and nutrients and presents many spots on the cross section of the bamboo. Fiber bundle can be divided into catheter, fiber, sieve tube and cell cavity. Bamboo green part of the fiber bundle contains more lignin, dense distribution, strength than wood several times higher. Near the marrow of thin of the distribution of fiber bundle strength than wood. Therefore, the strength of each part of the bamboo increases gradually from the inside out along the direction of the radius of the cross section.

The basic tissue of bamboo is composed of parenchyma cells, which are distributed around the bundle of fibers to store nutrients. The cells in internode were kinked, and the number of fibers was reduced, and their strength was only about 50% of that of internode.

What are the physical properties of bamboo?

1. Moisture content:

Bamboo fiber bundle contains water soluble in hot water, alcohol pentose, pectin and starch and other substances (6% to 13% of the weight), so it has a strong hygroscopicity and water recovery. The moisture content varies with the outside temperature and humidity, but there is no obvious fiber saturation point. When the water content is about 15%, the intensity increases with the decrease of water content, but when the water content is less than 7%, the intensity decreases with the decrease of water content. When the water content is between 15% and 30%, the strength decreases slightly. The strength changes little when the water content is more than 30%.

2. Volume expansion and contraction:

The volume expansion and contraction of bamboo varies with the amount of water content, with different directions: string direction **** (about 0.274), radial direction (about 0.255%), and longitudinal direction (about 0.222%). Bamboo green chordwise shrinkage of the marrow of three times, the longitudinal contraction is less than the marrow of contraction. Therefore, bamboo is easy to warp and crack during the drying process.

3. Weight:

The weight of bamboo varies with the distribution of fiber bundles, the presence or absence of bamboo joints, and the different parts. Usually nodes are slightly heavier than internodes, pale is about 50% heavier than flesh, base is heavier than slightly. The bulk density history of bamboo is affected by water content and should be subject to drying, which is between 0.6g/cm3 and 1.2g/cm3.