Everything You Need To Know About Paper Making Felt

How To Choose the Right Kind of Paper Making Felt For Your Project.

Choosing the right type of paper making felt for your project can be a daunting task, but it doesn’t have to be. The best method is to do some research on the different types of paper making felt and their various qualities, from weight and fineness to suitability for particular projects. Additionally, consider factors such as cost, availability, and any special requirements you may have for your project.

Blanket: Fabric felt used for paper forming and conveying in the paper industry.

It requires good dehydration, smoothness, antifouling, wear resistance, dimensional stability, drug resistance, antimicrobial resistance, heat resistance and hydrolysis resistance.

The processing method is to make a thick and thin bottom cloth with synthetic fiber, and then lay a mixed fiber net of synthetic fiber and a small amount of wool, which is made by acupuncture, chemical treatment, resin finishing and heat setting.

It is used for paper forming, wet paper pressing, dehydration and transportation.

According to the position on the paper machine, it can be divided into wet blanket, upper blanket and dry blanket.

The wet blanket is transported with water on the paper machine to press the paper blank to make it dehydrate and smooth.

The wet blanket has good water filtration and elasticity, high strength, small shrinkage, wear resistance, and can resist bacteria and acid and alkali corrosion.

The upper blanket is used above the wet blanket, with a small part contacting the drying cylinder, which plays the role of collar paper, top leveling and drying, and has the properties of smoothness, stiffness, good elasticity, wear resistance and high temperature resistance.

The dry blanket covers the drying cylinder, which operates under the humid and dry conditions, irons and dries the paper, and has the properties of firmness, good elasticity, wear resistance and high temperature resistance.

The dry blanket can also be replaced by canvas or breathable fabric made of polyester filament.

There are two types of paper blankets: woven and knitted. The woven paper blankets are made of wool and nylon short fiber blended yarn with a blending ratio of about 75:25 and are made by weaving, shrinking, pilling, drying and shaping.

The manufacturing method of needle-punched paper blanket is to first comb 50% wool and 50% nylon staple fiber or 100% nylon staple fiber into a fiber mesh, and then use a steel needle with barb to prick the fiber mesh onto the pre-woven circular bottom cloth to achieve a certain degree of tightness and smoothness.

Needling methods include single-sided needling and double-sided needling. Needling blankets are characterized by good water filtration, wear resistance, high strength and long service life.

Fabric felt used for paper forming and conveying in the paper industry.

It requires good dehydration, smoothness, antifouling, wear resistance, dimensional stability, drug resistance, antimicrobial resistance, heat resistance and hydrolysis resistance.

The processing method is to make a thick and thin bottom cloth with synthetic fiber, and then lay a mixed fiber net of synthetic fiber and a small amount of wool, which is made by acupuncture, chemical treatment, resin finishing and heat setting.

It is used for paper forming, wet paper pressing, dehydration and transportation.

According to the position on the paper machine, it can be divided into wet blanket, upper blanket and dry blanket.

The wet blanket is transported with water on the paper machine to press the paper blank to make it dehydrate and smooth.

The wet blanket has good water filtration and elasticity, high strength, small shrinkage, wear resistance, and can resist bacteria and acid and alkali corrosion.

The upper blanket is used above the wet blanket, with a small part contacting the drying cylinder, which plays the role of collar paper, top leveling and drying, and has the properties of smoothness, stiffness, good elasticity, wear resistance and high temperature resistance.

The dry blanket covers the drying cylinder, which operates under the humid and dry conditions, irons and dries the paper, and has the properties of firmness, good elasticity, wear resistance and high temperature resistance.

The dry blanket can also be replaced by canvas or breathable fabric made of polyester filament.

There are two types of paper blankets: woven and knitted. The woven paper blankets are made of wool and nylon short fiber blended yarn with a blending ratio of about 75:25 and are made by weaving, shrinking, pilling, drying and shaping.

The manufacturing method of needle-punched paper blanket is to first comb 50% wool and 50% nylon staple fiber or 100% nylon staple fiber into a fiber mesh, and then use a steel needle with barb to prick the fiber mesh onto the pre-woven circular bottom cloth to achieve a certain degree of tightness and smoothness.

Needling methods include single-sided needling and double-sided needling. Needling blankets are characterized by good water filtration, wear resistance, high strength and long service life.

Faults in blanket operation

Blankets, formed nets and dry blankets are three valuable items in paper production.

The use of blankets has a great impact on paper machine breakage, downtime and unit cost of finished products.

Therefore, in actual production, the blankets should be used as well as possible. In addition to reasonable selection, normal washing and careful inspection before use, the faults that are easy to occur in use should also be reduced.

The deviation of the blanket

There are many reasons for the deviation of the blanket, which are generally caused by the following reasons: 1) The regulator that is automatically calibrated by the instrument fails; 2) The touch palm touches the guide roller or the wrong signal on the rack causes the corrector to misoperate; 3) One side of the blanket is loose while the other side is tight, and the standard line is seriously skewed, which is generally caused by the unilateral loosening of the tensioning roller; 4) One of the guide rollers of the blanket loop is skewed; 5) One end of a guide roller is wrapped with pulp or the edge of the blanket is damaged, which causes the inconsistent linear speed; 6) The two press rolls in the press area are not equal, and the contact between the two ends is not consistent.

In actual production, attention should be paid to aligning the guide rollers and press rollers so that they are parallel to each other. It is very important to pay attention to the alignment of the single side of the blanket tension roller and to check the blanket corrector frequently.

Blanket pleating, except that the blanket is pleated in the middle due to inconsistent tightness, and the blanket runs too far on the edge of the blanket or the blanket is pleated in the whole bed,

There are several possible situations as follows: 1) The edge of the blanket is pleated. If the edge width of the blanket deviates slightly, it is easy to touch the bearing of the blanket roll and fold. Just tear off part of the blanket and adjust the corrector to make the blanket in the middle. 2) The middle of the blanket is pleated, and the standard line may be too skewed due to operation and other reasons; The guide roller is wrapped with pulp or too many sundries, and the wet paper is easy to cause the blanket to fold in the middle. 3) Folding in the middle of the blanket may be caused by the reverse direction of the blanket roll; If a roller does not rotate due to fault, it is also easy to cause the blanket to fold in the middle.

Generally, if the blanket is found to be pleated, stop immediately for inspection, lift the press roller at the same time, loosen the blanket, flatten the blanket manually, find out the cause, and handle it. For paper machine blankets with high line pressure, once pleated, it is extremely difficult to flatten and use, and most of them are crushed. Therefore, special attention should be paid to inspection and maintenance during use.

Blanket pressure loss: in addition to the edge loss, running edge and pleating of the paper guide blanket mentioned above, the blanket pressure loss may also have the following reasons: too much paste on the blanket loop, and the components falling from the loop path due to maintenance or the frame enter the pressure zone; The pulp ball or blanket ball on the rack falls into the blanket ring, and the hard sundries brought by the net part; The pressure of the press roll is very uneven; Or the blanket is damaged due to careless welding and other reasons.

Generally speaking, if there is a large hole in the blanket, it should be replaced.

If the hole in the blanket is small, but the quality of the blanket itself is still good, the method of sewing can be adopted for temporary treatment to maintain production.