felt for special paper using

Types of special paper-making felts:      

Over the years, our company has made use of its own product development and technical advantages, and has successively developed: non-fingerprint series papermaking felts, anti-depilation series papermaking felts, high-fine series papermaking felts, high-coarse series papermaking felts, needle-punched texture series papermaking felts , Anti-static dry felts, bottom net composite dry felts, needle-punched flocking dry nets and other series of special paper-making felts (dry felts), truly "special felts, refined functions, complete varieties, superior quality" .

 Matters needing attention in the production of special paper felts: The following is a brief summary of some precautions when our company develops and produces special paper felts for everyone to share:

1. Fully understand the different requirements of different specialty papers on papermaking felts:        Different special papers have different paper properties and special uses, so they have different performance requirements for the matched papermaking felts. Only by understanding the special requirements for felts can we produce qualified felts in a targeted manner.

1) Prevent depilation. Some special papers that need to be printed, such as wood grain base paper, tipping base paper, etc., have strict requirements on the release and lint of the blanket, otherwise the "hair" from the felt sticks to the surface of the paper and will easily cause "missing". And the “pasting” problem; at the same time, the “hairs” dropped from the blankets are mixed into the surface sizing liquid and accumulated more and more, so that these fine hairs can easily adhere to the surface of the paper with the glue; The fallen hairs are easily sandwiched between the coating blade and the paper sheet, causing linear coating "scratches" on the paper surface.

2) No felt marks are produced. Most special papers require no felt marks, especially some bill papers containing anti-counterfeit watermarks. If there are felt marks, it will greatly affect the clarity of the anti-counterfeit watermarks. At the same time, unnecessary felt marks will also seriously affect the quality of the paper. Beautiful.

3) There are felt marks. Some papers, such as sketching paper and craft packaging paper, need to produce clear, natural and beautiful strip marks on the paper. Most of these marks are produced by striped felts. The mechanically pressed lines are dull and regular. It lacks beauty and can't compare with the lines produced by striped felts.

4) The surface of the felt is smooth and delicate. This is also the basic requirement of most specialty papers for felts. If the felt surface is too rough, it will inevitably lead to uneven paper surface. Of course, some paper grades require a rougher surface, which in turn requires the surface of the felt to be rougher.

5) Water filtration performance and air permeability settings. This performance is very important for papermaking felts. Some specialty papers, such as tracing paper, have a high degree of tapping and difficult to filter the slurry. Some paper types such as tea bag paper and filter paper have a low tapping degree. The water is very fast, and these require the papermaking felt to have suitable water filtration performance, water retention performance and anti-rewetting performance.

6) Requirements for acid resistance.

Some specialty papers are made under acidic conditions, which requires the felts to be resistant to acid and oxidation. We need to use some acid-resistant raw materials to produce blankets.

2. Improvements and upgrades of equipment:      

The equipment required for the production of special paper is different from the equipment for the production of popular felts to a certain extent. The key parts need to be improved and upgraded. The company has several senior paper-making The needle punching machine and the setting machine have been adjusted appropriately, and some special equipments have been designed by themselves, the purpose of which is to meet the special performance requirements of special paper-making felts for the production of special paper.

3. Develop a meticulous production process to realize the particularity of special paper-making felts:      

The production process is the key to giving special properties to papermaking felts. The company has developed special production processes for the weaving of the bottom net (base cloth), the carding, pre-needling, needle punching and shaping of each special paper-making felt. Craftsmanship, truly "tailor-made" and personalized production. 4. Detailed functions and full varieties:       Our company is the first enterprise in the industry to put forward the concept of "specialized felts and refined functions". The special paper-making felts developed by this company have formed several series and more than 20 varieties, which can meet all the production needs of special papers. The two major series of products are: soft-based special paper special paper-making felt series and hard-based special paper special paper-making felt series. The paper has a fine surface and no felt marks, which can completely replace wool blended fabrics and high-chemical fiber felts, and is particularly suitable for the production of low-gram-weight specialty papers. The special papermaking felt for hard base special paper has good elasticity, resistance to high line pressure, stable size, good water filtration and air permeability, and is especially suitable for the production of various special papers on medium and high speed paper machines. 5. Selected raw materials:       The raw materials used for special paper-making felts must be carefully selected. The company’s engineers and technicians have selected nearly ten kinds of raw materials specially used for paper-making felts for performance comparison after many studies and experiments. The performance is maximized, and special raw materials are used for special felts to meet the needs of special paper performance. Through the efforts of the company’s engineers and technicians, the currently developed special paper-specific paper-making felts are clearly in the leading position in the industry, and enjoy a high reputation among special paper manufacturers. The special-purpose paper-making felts have become the company’s characteristic products and brands. product.