English
Reed (scientific name: phragmites comunis (cave.) trin. exoud.) is a perennial aquatic or wetland tall grass with well-developed rhizomes. The stem is upright, 1-3 meters high, with over 20 nodes. Reed is a diverse species widely distributed worldwide. Born along rivers, lakes, marshes, ponds, ditches, and low-lying wetlands. For example, in the Bosten Lake in Xinjiang, there are a large number of reeds that have been abandoned, causing problems such as eutrophication of the water body; Reed contains a large amount of reed cellulose, which is one of the good raw materials for preparing biomaterials. The development of organic polymer materials has played an important role in human society, but most organic polymer materials have almost no biodegradability, making environmental pollution increasingly serious. Therefore, there is an urgent need to design biodegradable materials. It is difficult to balance the performance of biodegradable materials while designing and emphasizing their degradability, or in some cases, sacrificing the performance of materials may be necessary. This makes it difficult for existing biodegradable material systems to meet the needs of multiple surfaces simultaneously. At the same time, considering cost, biodegradable materials are difficult to be widely used. Reed is a naturally growing plant with readily available raw materials and low prices. Therefore, using reed as a biodegradable composite material is a new development trend
The present invention is a biodegradable composite material mainly composed of reed material, comprising the following raw material components in a mass fraction ratio: 15 to 50 parts of reed crushed material, with an average diameter of 5 to 15 microns after reed crushing; 15 to 30 parts of modified starch; 10 to 50 parts of biodegradable resin; 0.5 to 1 part of coupling agent; 1 to 10 parts of active agent; 1 to 3 parts of degradation complex enzyme; 1 to 3 parts of degradation cycle regulator; The degradation complex enzyme is selected from one or a mixture of oxidoreductases, lyases, transferases, isomerases, synthases, sucrases, glutamate dehydrogenases, amylases, or dehydroascorbic acid; The degradation cycle regulator is selected from one or a mixture of one or more of diisopropylbenzene oxide (dcp), methyl ethyl ketone peroxide (mekp), 2,2,2, di (tert butyl peroxide) butane (dbpb), or tert butyl peroxybenzoate (bpb). Based on the above polymers, a 4-roll rolling structure is used to extrude sheet and board materials, which are used for vacuum forming disposable tableware, fruit trays, gift boxes, packaging boxes, automotive interiors, furniture and household appliances, logistics and e-commerce packages,
The structure is as follows:
The bottom of the S1 bracket is equipped with tracks, track wheels, and drive motors. According to the process requirements, the track wheels are driven to move forward and backward.
There are 2 sections of unwinding racks behind the S2 bracket, which can simultaneously install 2 rolls of material, 1 roll for machine use and 1 roll for backup. The unwinding installation has
Inflatable shaft, magnetic powder brake motor, automatic tension monitoring and control, maintain constant tension as the coil changes from large to small.
Behind the S3 bracket, there is a fuel tank. Used for heating thermal oil, connected to a circulating rotary joint with 4 pressure rods, to maintain the stability and uniformity of the roller surface temperature. Thermal oil heating is safer and more energy-efficient than electric heating rods, more dispersed and uniform, and has better insulation effect.
Front of S4 bracket. Vertically install 4 pressure rollers, each driven by 4 motor motors, with adjustment mechanisms on both sides. The gap between the roller surfaces can be adjusted by a handwheel, with larger gaps resulting in thicker sheets and smaller gaps resulting in thinner sheets.
The S5 bracket is equipped with a platform staircase for easy operation and space saving,
There are four unwinding racks above the S6 bracket, which can simultaneously install four rolls of material, one for machine use and three for backup. The unwinding rack is equipped with an air expansion shaft, magnetic powder brake motor, and automatic tension monitoring control. As the coil changes from large to small, it maintains a constant tension.
There is a swing arm device installed in front of the S7 bracket, which is equipped with guide rollers to adjust the tension buffering of the material after entering the pressure roller. Excessive tension can cause the material to curl and wrinkle in the composite. Insufficient tension causes material displacement and bubbles between the pressure rollers.
The process flow of the institution is as follows:;
The S0 unwinding material enters roller 1 from top A. The materials from the rear enter the pressure roller 1 synchronously. At the same time, it flows into roller 1 from the extruder mold,. Two materials, A and B, wrap the extruder material into three layers and enter the pressure roller. The gap and speed between the four pressure rollers are adjusted to composite the three layers of material together. Heat and cool to form.
S1， The four pressure rollers are composed of 1-2-3-4 combinations. Two of them, 1 and 2, are heating rollers that are injected by circulating heat transfer oil,
S2， The rollers 3 and 4 are cooling and shaping rollers, which are cooled by external cooling water injected into the rotary joint.
S3， From the first roller to the fourth roller, the sheet follows an S-shaped path from bottom to top, uniformly heating and cooling both sides of the sheet.
This structure, when used in conjunction with a production line, has extremely high industrial conversion and economic value.
