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|Felt Grammage:||750-850 G/m2||Bottom Wire:||Single Layer|
paper machine felt,
raw materials for making toilet paper
paper making felt with single layer bottom wire for toilet tissue
1. What is a papermaking felt and what does it do?
Papermaking felt is a valuable material in the papermaking industry. It plays a role in filtering the moisture in the pulp on the machine and tightly overlapping the wet paper layers in the multi-web. It is used for paper forming, wet paper dewatering and conveying.
2.how many types of paper making felt ?
According to its position on the paper machine, it can be divided into wet end felt and press felt.
3. Paper felt production process
Weaving ------ Inlaying ------ Base cloth setting ------ Flooring ------ Air-punching ------ Setting ---- Finished product.
4. How to choose paper felt?
The blankets are now made of full chemical fiber needle-punched blankets. Needle-punched blankets have the characteristics of fast dehydration, low moisture absorption, and no need for scorching. The specific situation depends on the structure of the base fabric of the felt and the specific gravity of the base fabric and the vacuum power of the paper machine. The size of the dryer depends on the configuration.
The length should not be short, the width should not be narrow, and the thickness should not be selected.
Only felts suitable for paper machines are considered good felts. Therefore, many felts have no quality problems, but they are not suitable for the performance of the paper machine. This requires more understanding of the paper machine's performance and configuration information, so as to help provide the most suitable good felt.
5. Paper felt installation
The front surface of the felt is sizing, and the felt has running direction arrows. After installation, rinse with hot water, preferably at 50-60 degrees, and add 5-10% sodium hydroxide or detergent, and idling after 15-20 minutes Cleaning. Then idle for 2-3 hours, the felt can be fully softened. The tension of the wool cloth in the early stage should not be too tight, and the speed should not be too fast. After two to three days, the wool cloth can be tightened and the speed can be raised. This will help the wool cloth.
6. Analysis of various problems in the use of paper felt.
6.1 The treatment of the felt widened after use
The felt may widen after being used for a while. This is normal. Do not tear it by hand. Stop the felt and cut off the extra edges after the felt is dry. Then use a soldering iron to iron the edges.
6.2 Standard Line Deviation Analysis and Processing
6.2.1 The length of the two sides of the felt itself is not consistent.
6.2.2 The rollers of the paper machine are not parallel, resulting in uneven elasticity of the felt.
6.2.3 After shutdown, the felt is watered unevenly when it is reopened, resulting in inconsistent shrinkage of the felt.
6.3 Analysis and treatment of front and back bending deformation of standard line
When the standard line is raised in the running direction of the paper machine, it is mainly caused by the excessively high middle roller.
The first method is to grind medium and high, and the second is to apply pressure on the roller.
The back of the standard line is mainly caused by the lack of middle and high rollers, or the middle line is correct but the pressure is too large.
6.4 Analysis of Causes of Felt Shrinkage
It is mainly caused by the unstable fabric loosening structure in the making of woolen cloth.
Treatment method: loosen the tight blanket roller and let the felt run in a relaxed state.
7. felt embossing
The most common occurrence of felt embossing is toilet paper. The following types may cause embossing.
1. Excessive amount of dispersant
2. Insufficient vacuum suction, excessive impurities in pulp
3. Insufficient water pressure, aging of roller rubber
4.Incorrect installation of roller position
5. The density of the felt cloth is too large, or the structure of the cloth is different.
6.The density of the insert mouth is too large
7. The weight of wool net is too large, and the thickness of the fiber is not matched properly.
8. Searching and processing methods for embossing points,
How to find the embossing point accurately when the felt is embossed due to the blockage. At this time, we should first pull the pulp down, slow down the car, water pipe and vacuum, and stop after the felt is cleaned. Water pipe, vacuum open a few more circles and stop, you can see the embossing point of the felt is white after the felt is dry, and then pick out the blockage with a needle. On the opposite side of the felt embossing point, we can cut three to five weft threads. So that the embossing process is complete
8. Analysis and treatment of the reason why the new felt is stained with pulp
The new woolen cloth dip is generally caused by the rough surface of the woolen cloth, and then the unevenness of the woolen cloth net. You can use a copper brush to brush it first. The cloth that has been used for a period of time is caused by too long fibers.
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