The application of forming fabrics in vacuum boxes

The pulp concentration is between 2 and 3%, and the dewatering capacity of the chopping board and the vacuum board is significantly reduced. The dewatering here must be done with a vacuum suction box with a vacuum ranging from 10 to 33 KPa.


When the net passed through the vacuum suction box, it began to remove moisture from the paper, but then the air also passed through the screen, and the air and water were pumped into the vacuum suction box. Where there is much moisture, the light reflects strongly. Like the mirror, the air penetrates the layer, which is called the “waterline” and is sometimes called the “dryer line”.


Generally, the water line is about 7% thick. In high-speed new double-layer (multi layer, Nip Wire Machine, etc.) paper machines, the waterline moves forward and is not see on the suction box.


The dewatering of the suction box is based on the suction of the vacuum pump, which creates a high pressure difference between the upper and lower sides of the paper, and forcibly dewatering the wet paper. It is hoped that the paper can be transferred to the press section with a high dryness. The vacuum cannot be used to force the dewatering. This accelerates the wear of the fabrics, increases the driving force of the fabrics, improves the tension of the fabrics, and has a long life for the fabrics. Bad effects.


The number of vacuum boxes varies according to the type of paper, the model of the paper machine, and the speed of copying. Generally, it is 7~9. In the multi layer,or Nip Wire Machine, the wetness of the wet paper is greatly improved. The number is greatly reduced, usually only 2~5, or even not used. In order to adapt to the change in the wetness of the wet paper, the vacuum of the suction box should be gradually increased.


Under the suction of the vacuum pump, the air mixture of water in the suction box is withdrawn from the suction box, enters the vertical pipe connected with the suction box, and the water is separated from the air under the action of gravity, and the white water is lowered to the water sealing groove. The air merges with the manifold and is pumped away by a vacuum pump.

Application of filter screen in Juice extraction press

Juice extraction is the core process of juice production, and the performance of the juicer directly affects and determines the quality and cost of the product. The belt juicer is one of the main models commonly used in large-scale production. Due to its simple structure, continuous work, high productivity, good versatility and low cost, it has been widely used in China in recent years.
Belt juicer is to use two circular mesh belt clamping fruit paste after bypass multistage range of pressing roller diameter, depending on the mesh belt tension and winding on the pressing roller outer net belt clip in the fruit paste pressure between the two net belt, squeeze out of juice. In order to overcome only by a disadvantage of low net belt tension produced by squeezing force, often in the last few level roller linear pressure roller, roller pressure phase and nip in two mesh belt in the middle of the fruit paste after pressing roller and pressure roller mesh area from outside net belt and the double pressure of pressure roller, than just rely on the mesh belt tension produced by squeezing force is several times higher. Type 6 dz1000 belt juicer juicing process embodies the belt roller pressure according to the characteristics of the squeeze force that partition operation, squeezing roller pressure high, wide adaptability, high rate of juice, pomace moisture content is low. Therefore, this kind of belt juicer can be used to crush apples, grapes and other materials, such as eucalyptus, apple pear and fresh ginger.

Prevent damage to the forming fabrics

1.Ensure that the surface of the roller is always smooth enough;

  1. Release air at both ends of the roller (about 2.5cm from the vacuum area) so that there is no slurry deposit on the roller;

-. Usually, deposits on the rollers are not visible, but can be felt by hand;

  1. Check the spray water filter:

– prevent any corroded metal from passing through;

– maintain proper water quality to avoid blockage of nozzle;

  1. Check the scraping condition of steering roller and breast roller;

– Deposits on these rollers can cause wrinkling of the forming wire;

  1. Before installing the new net, check all rollers for damage.
  2. Ensure that all nozzles are tightly fastened;
  3. Check the net correction, pendulum and extension devices to ensure that they are in good working condition;
  4. Ensure that the high-pressure needle spray is swinging and the water pressure does not exceed 35 kg/cm2 (500 psig/in2);
  5. Use a good cleaning procedure:

– Do not wash any debris into the running mesh;

– Do not flush the edge of the net directly with high pressure water;

– Ensure that the flushing hose water source does not contain debris;

Forming fabrics correction failed

  1. Check the forming fabrics by hand until a repair is made;
  2. If the forming fabrics with manual correction is not stable enough, it needs to stop repairing and correcting;
  3. Reduce the degree of vacuum to prevent the forming fabrics from catching or blocking on the vacuum suction box;

Reduced net life

  1. The components of the Fourdrinier paper machine network must be accurately lined up and in good mechanical condition;

– All filter elements must be fastened and at the same height;

– Check that the tension roller and automatic tensioning device cannot bounce;

  1. Poor cleaning of the case and poor routine maintenance are one of the main reasons for the shortened network life.

(a) Ensure that no fibrous aggregate forming slugs fall inside the forming fabrics;

(b) Keep the scraper in good condition;

– Prevent the slurry from accumulating on the guide roller and the breast roller;

– The first outer roller is essential to prevent the net from being damaged by the slug;

– Squeegee angle (about 25~30 degrees) is very important for ensuring proper wipe without scratching sound;

– The scraper load must be tested repeatedly, but overload must be avoided;

– Swing is a good warning for any and all squeegees;

– The breast roller scraper should always be inspected so as not to cause net marks or too much water on the breast roller;

(c) Check the water tray holes, rusted bolts or spray valves;

– Non-uniform flow of water around the spray valve may cause the metal to break off and flow through the spray pipe;

  1. Eliminate abrasive fillers, such as: calcium sulfate;
  2. Check the trajectory, calibration, tension, load and slip of the net;

– Ensure that the horizontal tension of the paper machine is even;

– Do not run the forming fabrics under too loose conditions;

  1. Maintain spray water temperature and pH consistent with the slurry;

– Ensure that the spray water pipes on both sides are not blocked;

  1. Adopt the low friction coefficient on the upper surface of the vacuum suction box;

– Check whether the upper surface of the vacuum suction box is flat;

  1. Reduce the number of vacuum suction boxes, increase the opening;

– reduce the degree of vacuum to prevent the forming fabrics from catching or blocking on the vacuum suction box;

  1. Remove grout in the pulp (centrifugal cleaner);

– Check for scratches and burrs on the forming plate, vacuum suction box surface and the cutting board;

  1. Use the net life extension agent (net cleaning agent);
  2. Adequate traction should be provided to ensure that the net does not slip at the breast roller;
  3. Operate at the lowest vacuum level of water absorber in operating procedures;

– ensure free flow of water from the suction box into the water seal tank;

  1. Check the installation of the forming plate to ensure that there is sufficient space for even and minimal drainage of the breast rollers;
  2. Check the cleaning of the roller steering system;

– check the load of scraper, scraper, spray water, bearing and excessive spray water pressure;

  1. Check the wear strip on the side setting device or the cheek plate of the slurry tank to determine whether it is installed too low;

The net is raised/wrinkled

Note: the net bulge often develops into wrinkles, which may gradually form a cord or overlap.

  1. In general, oblique uplift due to unalignment;
  2. Straight line heave is usually caused by the following reasons:

– slurry deposition between breast roll and lip plate;

– slag forming on dewatering element;

– resin concentration;

– too much water when rotating;

  1. Drumming may come from:

– the vibration distance of the network case is too long;

– roll deflection;

– There is a twist zone in the multiple vacuum box unit

– after the paper is on the web, the vacuum pump has shear force;

– the steam box is still running when the net crawls slow or stops running;

4.- the whole net wear may be due to:

– rough surface hairiness of vacuum water absorber;

– roller corrosion;

– surface abrasion or breakage of glass fiber rollers;

Network vibration

Note: In general, when the slurry is connected to the grid, the vibration will have a negative effect on correcting the deficiencies of the slurry, but it can suppress the flocculation during filtration;

  1. Observe the opening and stopping of the forming network;

– Adjust the network corrections;

  1. Once vibration stops, the web will dry on the forming fabrics;

– To maintain the quality of the sheet, it is necessary to add water;

  1. When the speed is lower than 300~400 meters/minute, the vibration is effective;
  2. At lower speeds, the web will resist flocculation more effectively if the vibration frequency increases;
  3. Increase the frequency of vibration and remove more water from the net;
  4. As the frequency of vibration decreases, the filtered water speeds up, and the web of clouds becomes heavier;
  5. Vibration efficiency and vibration amplitude are proportional to the square of the frequency, and indirect proportion to the speed;

Network slip or flutter

  1. Maintain proper distribution of traction loads;
  2. Use snake woven nets;
  3. Tighten the forming fabrics;
  4. Reduce vacuum:

– If possible, remove the water to reduce the vacuum;

  1. If possible, increase the vacuum level of the couch roller;
  2. Check the flow of paper on the forming board;
  3. Check for turbulence that is 3 to 5 meters beyond the original forming area;
  4. Excessive delay in the initial filtration stage can cause turbulence;


  1. High acidity (free or total) is almost always detrimental to machine performance and product quality;

– check pH controllers, charts, and acid or base addition points;

  1. High acidity (low pH) is corrosive to mechanical equipment;

– Fouling and rust can come off the pump and pipes and create dirt, spots or holes in the web;

  1. Check the paper pH value;

– The faded paper may produce residual acid;

  1. Control the pH of the factory’s incoming water;
  2. High acidity has a bad influence on quality:

– Causes hair loss and powder loss;

– Degrades fiber, thus reducing strength and long-lasting properties;

– Most dyes react differently when the pH is changed, thus affecting the color;

– Seminal plasma requires more energy to change fiber shape;

  1. The negative impact of paper machine operations:

– In the case of blankets, the jamming trend has increased;

– It takes longer to dry the web;

– Due to the poor absorption of the paper by the paint, it weakens the absorption of the paint and fiber surface;

See the “Changes in pH” section.

Aluminum sulfate added

  1. Aluminum sulfate can be used to control pH value, fixed rosin gum, auxiliary retention and flocculation, and resin sediment control;
  2. The change of pH value caused by changing the amount of aluminum sulfate can change the color and influence the adsorption force between wet paper width and press roller;
  3. The peeling or “anti-stripping performance” of wet paper amplitude changes with the content of alumina;

– if the pH value is too high, crushing paper may be produced; When the pH value decreases, the paper will disappear.

  1. Too much aluminum sulfate in the system will have a negative impact on the strength of paper pages, the filtration water at the screen and the combination of fibers, and may even reduce the efficiency of rosin sizing.
  2. Many problems are related to low levels of alum or bauxite ions in the system. Low sizing, foam problem, formation of free rosin deposits, decrease of fiber binding force, deterioration of water filtration and significant trend of resin deposition all testify to this.

See the section “sodium aluminate”.

Wet-end chemistry

  1. Many chemicals used in the wet part can improve the water filtration to varying degrees, and improve the internal binding force of fine fiber, the retention rate of fillers and the dry and wet strength.
  2. Too little essential chemicals will not achieve the desired effect:

– may lead to poor water filtration, loss of fine materials and fillers, as well as reduction of binding force and strength between fibers;

  1. However, excessive use of chemicals may have the opposite effect. For example, overflocculation leads to poor evenness, which in turn has a negative effect on almost all strength properties;
  2. It is very important to strictly control the solid content and viscosity when preparing the auxiliary materials;

– temperature is also important for viscosity control;

  1. Increasing the amount of water entering the sizing press paper can increase the amount of glue hanging and the retention of surface glue;
  2. Reduce the pressure of the sizing press line, increase the amount of glue hanging, and ensure more treatment of the page surface;
  3. Reduce the amount of glue applied in the slurry to improve the amount of glue applied on the surface;


Classification and characteristics of synthetic fiber forming fabrics.

Because of its soft material, synthetic fiber forming fabrics can be designed for many kinds of weaving. General forming fabrics in the world today, according to its structure can be roughly divided into single layer (single layer of woven) and multilayer (multilayer woven), multilayer includes double (double layer weave), three layer (triple layer weave), etc.

Single layer forming fabrics can be divided into ring nets and plug-in nets according to their knitting procedures. Ring network, also known as an endless network, is an endless ring network that is woven directly from a loom. Its structural characteristics are weaving, the longitudinal direction of the paper machine (MD) for the weft, without the joint fiber yarn for double weaving at the interface. The longitudinal direction of the plug-in mesh weaving is a warp yarn, which is first knitted into a single piece. Then, the ends of the single piece are inserted by warp threads to form an endless net.

1.5 layer forming fabrics are improved products of single-layer nets, and have improved multilayer net properties by increasing the density of the surface weft threads of stickers. The smoothness of the sticker surface, pulp fiber retention, dewatering performance, and cleaning performance are all greatly improved. The disadvantage is that it is not wear-resistant and has a short service life. Once the foreign matter has fallen into the net, the net will not be repaired.

Double layer forming fabrics usually weave two layers of weft threads into horizontal double-layer weaves. Compared with single layer forming fabrics, the warp and weft lines have high density, and therefore have the characteristics of hard shrinkage and dimensional stability. The wire diameter and material of the paper-side and machine-side weft yarns can be arbitrarily selected according to the application requirements, thereby improving web scratches, surface appearance, smoothness, and service life. The three-dimensional space is large and the dewatering property is superior. The dewatering force does not directly affect the paper. Because of this, the fiber retention rate and the fiber loss rate are improved.

2.5 layer forming fabrics, as an improved type of double layer forming fabrics, increases the density of the sticker surface weft, increases the number of paper support points, effectively improves the net mark and fiber retention rate, and improves the surface properties of the paper. The density of non-stick surface weft yarns can be reduced, so that the internal three-dimensional space of the net is increased and the dewatering performance is improved.

Drainage, forming, retention, and the effect on the paper surface of the web are very important in the slurry forming process. According to the existing drainage concept, improved slurry formation usually has to be at the expense of retention, low-dose retention helps change the batch properties, and it is possible to improve shaping by increasing turbulent flow effects. Only when the forming fabrics is at high mechanical retention, reducing the dose will work. The SSB triple layer forming fabrics possesses these properties. Its characteristics are: Compared with double layer forming fabrics and 2.5 layer forming fabrics , SSB nets with structural weaving design have higher fiber support, and open evenly spaced meshes have a larger area and more Uniformly small meshes make the drainage more uniform, and the DC-type drainage channels also make drainage easier, have good air permeability, and improve the tension cross-section of the mesh.

In the SSB network, the latitude and longitude lines of the decal side and the non-stick side are individually layered according to the respective requirements, and then the two layers forming fabrics are joined together with stitching yarns. The surface of the upper layer of the network is dotted with a large number of latitude and longitude lines. It is an ultrafine mesh flat fabric. The lower mesh screen is much coarser (only half of the upper layer is fine), so thicker diameter wires can be used to improve the wear resistance of the mesh, the volume of the three-dimensional space increases, the service life is longer than the upper mesh, and the drainage performance is better. The upper line is finer, and the line is located exactly between the upper and lower layers when attached, so it will not be worn out. The number of tie lines depends on the specific use and requirements of the forming fabrics. The net surface cleaning performance is better than double-layer nets, and the range of paper produced is also much larger. Web marks, surface properties, and fiber retention can all be improved.

Special triple layer forming fabrics are constructed and designed so that the upper and lower meshes are the same. While maintaining the original superiority of the three-layer network, the thickness of the network is reduced, and the internal void space is reduced, so that the water retention rate of the network is reduced. And the net is wear-resistant and has a long service life. The mesh can be repaired in time as soon as the foreign object falls into the mesh and causes a small hole.

paper machine clothing

Top pulp on paper machine clothing

The main reason for the top pulp of the fabrics is the local wear of the belt. I have checked the worn area with a magnifying glass, and the worn surface is flat after a period of time, and is relatively smooth.

The solution can be considered from the following aspects:

  1. Select a mesh made by a large manufacturer with good quality, and it is better to require that warp monofilamens are imported and wear resistant.
  2. Use the imported ceramic panels, such as dehydration board and vacuum box panels, have low friction coefficient and less wear to the network;
  3. In the production process, the control vacuum degree is appropriate, and the tension degree of the net is appropriate;
  4. Select filler with small particle size and large mesh size, and strengthen the cleaning of network;
  5. Use good chemicals to improve the retention rate of fillers, reduce the loss of small fibers, and reduce the wear of the mesh belt.

Paper machine clothing prone to paper disease.

The paper machine clothing is the key part of the forming of wet paper, and also the source of many paper diseases. The common paper diseases of the network include the following aspects:
1.The sloshing of the net department and the sloshing of the net edge are one of the main causes of paper disease. When it is light, there will be a paper hole at the edge of the paper, or a cracked edge will occur. When it is heavy, it will cause a paper break. The sloshing of the network is generally caused by the unclean edge of the core layer. > Noodle net> bottom net). The net edge of the core layer is not clean, which may be due to the poor adjustment of the blanking water, or it may be due to the fluctuation of the liquid level of the outer white flume and the movement of the forming network. At the outlet Angle of the top and core networks, sometimes the slurry is also sloshing, which is because the slurry on the edge of the net gathers too much, and special attention must be paid when  manufacturing high-grade papers.
2.Water Needle: The water needle can be said to be a key  to a paper machine, special care must be taken in its maintenance. First of all, the pressure of the water needle should be appropriate. If it is too big, it will splash the slurry. If it is too small, there will be danger of cutting constantly. In the process of the paper, attention should be paid to the change of the pressure of the water needle. When pulling the water needle to adjust the width , it should be slow and steady. The prerequisite for proper use of the water needle should be the cleaning and scaling control of the water source, so as to prevent the water needle from working properly because of the clogging and scaling of the small matter.
3.Net Department of high-pressure water: Net Department of high-pressure water is responsible for cleaning, if the high-pressure water blocking, the forming network will be blocked by fine fibers and resin, and make curtain paper disease (white bars) due to poor dewatering of the net department.
4.Spraying starch tube: Spraying starch tube is easy to produce paper disease, starch spots, small bright spots (because the pressure of sprayed starch is too high), sometimes the pressure of sprayed starch is too small, the starch does not become mist, but starch is dripping.This will also cause a continuous starch paper drop on the paper.
5.Regulation of the vacuum in the network: the vacuum of the network should be adjusted to the vacuum of the wet suction box, so as to ensure the return flow of the white water in the lower part of the network: the position change of the water line should be paid attention to when adjusting the vacuum. The vacuum degree of the transfer of paper is guaranteed, otherwise there will be a pulp strip in the case of a bad peeling of the paper.
6.Scaling of the vacuum roller: whether it is the vacuum pressure roller, vacuum suction roller or the finishing roller, it is often caused by scaling, which causes the fouling of the roll hole. This is also unavoidable in most paper mills. Similarly, the scaling of the vacuum dewatering plate will aggravate the wear of the forming network. We use the scale control agent of Jining Jundeli Chemical Technology CO., LTD., and choose the suitable dosage position and dosage, which has successfully solved the scaling problem of the vacuum roller.
There are many factors that cause paper sickness in the network, and the pulp on the rack, especially on the surface of the suction box, can also cause paper sickness.

paper machine clothing

The end connector of mesh belt.


  1. The development status of mesh belt joints

Polyester mesh belt is extremely versatile. It can be applied in mine transport metallurgy, food, and paper industry. It is also an important piece of equipment for sewage treatment in environmental protection.With the development of the chemical industry, the polyester mesh belt has better performance and is an ideal supporting product for some industrial upgrading. According to the actual needs of the work, mesh belts are generally divided into end connectors and endless connectors. However, endless joints require complex mechanical structures, and it takes a long time to install the online machine, the development trend is mostly end connectors. Therefore, research on the structure of end connector and the use of materials is necessary. It was originally used with the same wire as the mesh (for example, nylon) to make the flat (ellipsoid section) spiral connection ring. The latter is made of stainless steel wire and made of the same form, both of which are woven by hand in the end of the net. When the machine is installed, just take the mesh belt across the drive roller. For a good link, insert the thread into the thread. This eliminates some of the disadvantages of the endless connector mesh belt, which is easy to install and reduce labor intensity. The benefits of efficiency. However, they are prone to early damage, and their short service life (ie, low strength) is the fatal weakness of such joints. Test data show. The tensile strength of such joints is reduced by more than one third compared to mesh belts. and so. A net with thousands of dollars. Some serious problems with connector damage occurred in just over one hour. For spiral processing, high temperature setting surface is required to reduce the strength, what is more noteworthy is the failure of the screw joint observed from the experiment: when a line is broken somewhere, the entire helix is pulled out of the thread. This is also the case in production. The mesh belt immediately loses its ability to work. New network belt. This affects the timely completion of production tasks and damages the reputation and benefits of the manufacturers.

  1. Development of new connector.

With the rapid development of China’s economic construction and the increasingly prominent environmental protection of the city, the crucial link of mesh belt joints should be able to be reformed and improved in strength. This has become an urgent practical problem to be solved. In view of the above-mentioned joint damage characteristics and the reasons for the strength reduction, a comprehensive analysis should be carried out to consider the joint structure shape, manufacturing process and dimensions, etc., to develop a high-strength joint. In the investigation and study of various types of mesh belt joint structure and materials used at home and abroad, trial and trial trials were repeated to design a new type of more ideal net with terminal joint structure. Stainless steel wire was used to make the steel buckle without heating. The performance of raw materials, each steel buckle is independently bound at the end of the mesh belt. Even if individual steel buckles are damaged – they can continue to work. This shows their advantages: the shape and size change, the steel buckles on each side are different from each other, and are set on 3 to 5 wefts in a positive and negative manner, so that the steel buckles The force is absorbed by the two cross-sections of the mesh belt to improve the stress state; the strands are coated to achieve a smooth transition of the mesh belt ends and the positioning of the steel buckles, which enhances the firm connection between the mesh belt and the steel buckle. These process effective measures. All contribute to the improvement of joint strength.

  1. Steel buckle production and binding

The steel buckles are made by the designed machine. Because of the different mechanical properties of different grades of materials, their molds should be different. The mold requires high strength, good abrasion resistance material processing, and requires heat treatment to increase the hardness, not easy to wear. The precision of the core groove of the binding tool is very high. In the binding process of the steel buckle, the direction of component force of deformation is not allowed to be zero, so as to ensure that the steel buckle is set along the desired direction. The steel buckle of different specifications should be Corresponding to the core slot. In order to further improve the binding quality of the joints, there are many advantages to grinding the tip of the steel buckle into a wedge shape: the steel buckle is easily bound, the mesh belt is less damaged, the mesh belt joint strength is further improved, the bound end of the mesh belt is relatively smooth, and the transmission is more stable. Small mutual wear, is conducive to extend the life of the mesh belt, but the specific test data should also be identified.

forming fabric

How to make the forming fabrics long work life.

  1. The elements of the Fourdrinier paper machine network must be accurately lined up and in good mechanical condition;

– All water filter elements must be fastened and at the same height.

– Checking tension roller and automatic tensioning device cannot bounce.

  1. Poor cleaning of the case and poor routine maintenance are one of the main reasons for the shortened lifespan of the network.
  • Make sure there is no fiber accumulation to form the pulp and fall into the inner part of the forming network.
  • Keep the scraper in good condition.

– Prevent the accumulation of pulp on the guide roller and chest roll.

– The first outer roller is crucial to prevent the net from being damaged by pulp lump.

– The squeegee Angle (about 25~30 degrees) is very important for ensuring the proper scraping but no scratching and no jumping.

– The scraper load must be tested repeatedly, but it must be avoided overload.

– Swinging is a good warning for any and all scraper.

– Always check the chest roller scraper to avoid causing the net mark or the chest roller with too much water.

  • Check water tray holes, rusted bolts, or spray valves.
  1. Remove abrasive fillers such as calcium sulfate.
  2. Check the net’s trajectory, calibration, tension, load and slip.

– Ensure the horizontal tension of the paper machine is uniform.

– Do not run the forming fabric in too loose state.

  1. Maintain spray water temperature and pH consistent with slurry.

– Ensure that the spray water pipes on both sides are not blocked.

  1. Low coefficient of friction on the upper surface of the vacuum suction box.

– Check whether the upper surface of the vacuum suction box is flat.

  1. Reduce the quantity of vacuum suction tank and enlarge the opening.

– Reduce the degree of vacuum to prevent the forming fabric from stucking or blocking on the vacuum suction box.

  1. Remove pulp coarse sand (centrifugal cleaner).

– Check whether there are scratches and burrs on the surface of the forming board, the surface of the vacuum suction box and the cutting board.

  1. Use of network life extender (net cleaning agent).
  2. Due to the appropriate rich traction to ensure that the net is not sliding in the chest roller.
  3. Operates at the lowest minimum vacuum suction tank of the operating procedures.

– Ensure that the water can freely enter the water seal groove from the suction box.

  1. Check the installation of the forming plate to ensure that there is enough room for a uniform, minimal chest roll drainage.
  2. Check the cleaning of the roller system.

– Check scraper, scraper load, spray water, bearings and excessive spray water pressure.

  1. Check the wear bars of the edging device or flow slurry tank cheek to determine if the installation is too low.
paper machine clorhing

The world reached the crossroads about 100 years change situation.

“Looking at the world, we face a major change that has not been seen in a century.” said by President Xi Jinping when he received all envoys who returned to China to participate in the 2017 Diplomatic Mission job meeting recently.

The international community generally believes that the reform of the global governance system is at a historical turning point. The trend of multipolarization in the world has become even more obvious.The current international system originated in the west and is based on the westphalian system, and the west has always been dominant. Now, with the rise of the emerging countries, developing countries as a whole have contributed more and more to the world in terms of political and economic culture. At present, the global manufacturing landscape is undergoing a dramatic reshaping, intelligentization, and the Internet has changed the traditional manufacturing industry. The original production system based on Western industrial standards is undergoing a revolutionary transformation in the emerging economies.Henan Benost Textile Technology Co., Ltd., as a pioneering star in the field of Chinese industrial textiles, has gradually updated old parameters, developed new ideas, and developed revolutionary new works from the design of raw materials, the transformation of weaving processes, and the development of cutting-edge applications. Benost has continuously launched new materials technology products such as papermaking forming fabrics and dryer fabrics. The nano-grade self-lubricating forming fabric adopts a special weaving process, which has excellent dewatering performance, and the fiber retention rate is significantly improved, which improves the paper quality while achieving higher production speed for the papermaking production line.

Forming fabrics

How to solve wire mark paper disease?

  1. By adjusting the lip orifice in the direction of the weir plate, reduce the leakage of the chest roller. If possible, change the bending of the lip of the weir plate to make the extruded slurry fall further away from the forming network.
  2. For dehydration slow slurry, reduce the fine grinding.
  3. Gradually increase the vacuum of the vacuum box and use all vacuum boxes
  4. If the forming fabricis too loose, increase the tension of the net.
  5. Increase the slurry concentration.
  6. Reduces dam board, dewatering elements and vacuum boxes.
  7. Adjust as necessary: raise the position of watermark roller; Reduce press roll load; Study the possibility of using high mesh forming fabric; Sometimes the screen printing is related to the depth of the penetration forming network.
  8. Excessive dehydration without turbulence may cause the wet paper to seal, which will lead to higher vacuum chamber vacuum and pull the paper to the formingfabric.
  9. Use a lower jet Angle.
  10. Excessive dehydration during initial molding will cause the ends of the fibers to stand upright and be inserted into the forming
  11. We will have more satisfactory solutions for the filth network problems.