Specialty paper is made from different fibers using a paper machine to produce paper with special functions, such as using synthetic fibers alone, synthetic pulp, or mixed wood pulp, and modifying or processing them with different materials to give the paper different functions and uses. For example, it is used for daily life, building materials, electrical products, industrial filters, mechanical industry, agriculture, information, optics, cultural and artistic use, advanced biochemical technology, etc. Any paper used for special purposes is collectively referred to as specialty paper.

The production process of special paper production line

The production process of specialty paper includes steps such as pulp preparation, paper forming, paper processing, and paper coating.
Pulp preparation
Pulp preparation is the first step in the production of specialty paper. The preparation process of pulp usually includes the selection of raw materials, soaking, boiling, bleaching, etc. Different raw materials and processing methods can produce different pulp, thereby affecting the quality and performance of the final paper.
Paper Forming
Paper forming is the core step in the production of specialty paper. In this step, the pulp will be sprayed onto the paper machine, and through processes such as filtration, pressing, and drying, the moisture in the pulp will evaporate to form paper. In the process of paper forming, it is necessary to control the concentration of pulp, the speed and temperature of the paper machine, and other parameters to ensure the quality and performance of the paper.
Paper processing
Paper processing is one of the important steps in the production of specialty paper. In this step, the paper will undergo coating, calendering, processing, and other treatments to enhance its quality and performance. Coating can make paper waterproof, oil resistant, and fire-resistant, while calendering can make paper smoother and more uniform. The processing of paper can be carried out according to specific application requirements, such as cutting, folding, embossing, etc.
paper coating
Paper coating is the final step in the production of specialty paper. In this step, the paper will be coated with a special layer to enhance its performance. The type and thickness of the coating can be selected according to specific application requirements. Common coatings include polymer coatings, metal coatings, ceramic coatings, etc. Coatings can give paper properties such as wear resistance, corrosion resistance, and conductivity, thereby expanding the application areas of paper.

Now introduce the performance of some special industries:

1. Special materials such as aramid and spandex: spandex, also known as polyurethane fiber, is an elastic fiber that can be stretched 6-7 times. It is mainly used on clothing that needs to be stretched to meet comfort requirements; Aramid fiber, also known as polyphenylene terephthalamide, is a high-tech synthetic fiber used in composite materials, bulletproof products, building materials, special protective clothing, and electronic devices. Our company has been providing customers with pulpers, grinders, and dewatering machines for a long time.
2. Banknote paper and chemical fiber industry: The design and production of large taper pulping machines and cyclone pulping machines suitable for the cotton pulp industry are widely used in banknote paper mills and chemical fiber industries.
3. Nitrocellulose industry: Nitrocellulose, also known as cellulose nitrate ester, is highly flammable and explosive, so special attention must be paid to the design and production of equipment. The company’s specially modified pulpers, conical grinders, and double disc grinders have undergone multiple tests and operations in processing nitrocellulose, completely replacing imported products. In 2008, three fine cutting machines were exported to Africa to produce nitrocellulose.
4. Glass fiber: Glass fiber, also known as Fiberglass, is an inorganic non-metallic material with excellent performance. It has good insulation, heat resistance, corrosion resistance, and high mechanical strength, but is very brittle and fragile. It is mainly used as a reinforcing material in composite materials, electrical insulation materials, thermal insulation materials, circuit boards, and other fields of the national economy. The pulpers, slag removers, and dewatering machines supplied by our company are mainly used for processing fiberglass and are mainly used for batteries.
5. Thin carrier paper for electronic components: Thin carrier paper for electronic components is mainly used in the electronic chip industry. We have signed a contract with the customer for the complete set of equipment for the pulp making system and flow system of the electronic thin carrier special raw paper project.

For over 20 years, our company’s equipment has had a large customer base and operational data in various industries such as decorative paper, copying paper, pine paper, medical packaging paper, artistic paper, air filter paper, Gracin paper (release paper), high-voltage cable paper, insulation paper, capacitor paper, carbonless copy paper, transfer printing paper, cigarette paper, banknote paper, cement bag paper, grass rope paper, non-woven bag paper, household paper, and chemical fiber industry. The special industry is an industry with high requirements for equipment and processes. The company has accumulated a lot of practical experience and strives for excellence in its own products, meeting the equipment needs of the vast majority of the special paper industry.

Classification of main specialty paper production lines