paper machinery – Paper machinery-paper making machine,paper manufacturing machinery

Cylinder Mould for Paper Machine

webadmin — Sun, 28 Dec 2025 02:53:12 +0000

Our cylinder mould is designed for cylinder mould paper machines, widely used for producing kraft paper, fluting paper, cultural paper, tissue, board paper, specialty paper, and insulation paper,etc.

The mould is manufactured with high-precision structure and uniform wire arrangement to ensure stable sheet formation and consistent paper quality.

We supply high-quality cylinder moulds for paper mills worldwide, designed to deliver stable performance, excellent forming quality, and long service life.
From standard designs to fully customized solutions, our cylinder moulds are trusted by paper manufacturers for consistent operation and reliable output.

Perforated Plate for DD washer/Twinroll press washer

webadmin — Tue, 23 Dec 2025 13:46:07 +0000

Perforated Plate for Pulp– High-Precision Stainless Steel Screen Plate

Our perforated plate (also known as screen plate for pulp screening &washing systems) is engineered for high-efficiency fiber separation and stable pulp screening performance in modern pulp & paper mills. Manufactured from premium stainless steel and processed with CNC drilling technology, our perforated plates deliver excellent wear resistance, smooth surface finish, and consistent hole accuracy.

Designed for applications in Andritz DD washer(drum displacer washer ),Valmet Twinroll press washer , our perforated plates ensure improved screening efficiency, reduced energy consumption, and longer service life.

Key Features

High-precision CNC-drilled perforations ensuring uniform hole geometry and stable screening performance.
Premium stainless steel material (/SS316 / SMO254) for excellent corrosion and wear resistance.
Smooth polished surface to minimize fiber blockage and improve throughput.
Optimized open area increasing screening capacity and reducing power consumption.
Custom hole diameters, including 1.2 mm, 1.4 mm, 1.8 mm, slotted holes, stepped holes, and profile holes.
Long service life with high mechanical strength and anti-abrasion properties.

Applications

Andritz DD washer(drum displacer washer )
Valmet Twinroll press washer

Vacuum Roll

webadmin — Mon, 17 Nov 2025 13:11:43 +0000

It includes Vacuum Press Roll, Vacuum Pickup Roll, and Vacuum Couch Roll,etc.

The vacuum roll is a key dewatering and sheet-handling component used in the forming and press sections of the paper machine. It is designed with a precision-drilled stainless steel or nickel-alloy shell, featuring thousands of uniform suction holes and an internal vacuum box system. The roll operates under controlled vacuum pressure to enhance water removal, sheet transfer, and web stability at high speeds.

Vacuum Press Roll

The vacuum press roll is used in the press section to increase sheet dryness before entering the drying section. By applying vacuum inside the roll shell, water is extracted more efficiently during the nip, improving dryness, reducing rewetting, and lowering steam consumption. The roll is equipped with a heavy-duty bearing system and is dynamically balanced for smooth operation.

Vacuum Pickup Roll

The vacuum pickup roll is located at the end of the forming section and plays a critical role in transferring the wet sheet from the forming fabric to the press felt. The vacuum zone ensures stable sheet pickup without sheet breaks, even at high machine speeds. The roll’s suction area and hole pattern are optimized to minimize marking and improve sheet formation.

Vacuum Couch Roll

The vacuum couch roll is positioned in the latter part of the forming section, where it provides final dewatering before the sheet leaves the wire section. High vacuum levels remove additional water from the web, improving sheet dryness and formation uniformity. The shell is engineered with corrosion-resistant materials and precise hole geometry to ensure long-term stability and consistent vacuum performance.

China Leading PAPER MACHINE manufacturer,stock preparation equipments, paper making machine, toilet tissue paper making machine,corrugated paper machine, A4 copy paper machine,Kraft paper machine, writing paper machine,printing paper machine,etc.

Press Roll

webadmin — Mon, 17 Nov 2025 12:28:46 +0000

The press roll is a key component of the press section, designed to remove water from the wet paper web through mechanical pressure. It consists of a high-strength forged steel shell with optimized crown design to ensure uniform nip pressure across the full machine width. The roll surface is precision-ground to achieve excellent smoothness and dimensional accuracy, ensuring stable operation at high machine speeds.

The internal structure includes a high-efficiency water removal system, such as drilled blind holes or suction chambers (depending on roll type), which enhances dewatering performance and reduces sheet rewetting. Heavy-duty spherical roller bearings and a robust shaft design ensure long service life under continuous load. Dynamic balancing is performed according to G1.6 (or G2.5) standards to guarantee vibration-free running at operating speeds.

The press roll provides consistent nip loading, improved sheet dryness, and contributes to energy savings in the drying section, making it a critical component for high-quality paper production.

Chemicals for papermaking

webadmin — Fri, 10 May 2024 05:16:15 +0000

There are various kinds of paper product,different paper product has different characteristics.Chemicals are necessary for their characteristics when paper machine produces the paper.The following are some common chemicals in papermaking.
Optical brightener
Optical brightener is used to make paper appear more white. Optical brightening agents use fluorescence to absorb invisible radiation from the ultraviolet part of the light spectrum and re-emit the radiation as light in the visible blue range. The optical brightening agent thus generates blue light that is added to the reflected light. The additional blue light offsets the yellowish tinge that would otherwise exist in the reflected light characteristics. It thus increases the brightness of the material (when the illumination includes ultraviolet radiation).
Pigment
Pigments that absorb in the yellow and red part of the visible spectrum can be added. As the dye absorbs light, the brightness of the paper will decrease, unlike the effect of an optical brightening agent. To increase whiteness, a combination of pigments and optical brightening agent are often used. The most commonly used pigments are blue and violet dyes.
Retention agent
Retention agent is added to bind fillers to the paper. Fillers, such as calcium carbonate, usually have a weak charged surface. The retention agent is a polymer with high cationic, positively charged groups. An additional feature of a retention means to accelerate the dewatering in the wire section of the paper. Polyethyleneimine and polyacrylamide are examples of chemicals used.
Caustic soda
Caustic soda is added to increase the pH in the pulping process of fibers. The higher pH of the paper fiber solution causes the fibers to smoothen and swell, which is important for the grinding process of the fibers.
Sizing agent
Internal sizing of paper, most paper types must have some water-resistance in order to have a specific writing quality and / or printability. Until 1980 mainly a rosin in combination with alum was used. When the paper industry started using chalk instead of china clay as filler, the paper chemistry had to switch to a neutral process. Today mainly AKD (alkyl ketene dimer) and ASA (alkenyl succinic anhydride) are used.
Wet strength additive
Wet strength additives ensure that when the paper becomes wet, it retains its strength. This is especially important in a tissue paper. Typical chemicals used are as epichlorohydrin, melamine, urea formaldehyde and polyimines. These substances polymerize in the paper and result in construction of a strengthening network.
Dry strength additive
Dry strength additives, or dry strengthening agents are chemicals that improve paper strength of normal or not wet condition. Those strength including compression strength, bursting strength, tensile breaking strength, delamination resistance etc. Typical chemicals used are as cationic starch and polyacrylamide (PAM) delivertives. These substances act as binder of fibers, often under aid of aluminum ion in paper sheet.
Cationic starch
To enhance the paper strength, cationic starch is added to wet pulp in the manufacturing process. Starch has a similar chemical structure as the cellulose fibre of the pulp, and the surface of both the starch and fibre are negatively charged. By adding cationic (positive charged) starch, the fibre can bind with the starch and thus also increase the interconnections between the fibres. The positively-charged portion of the starch is usually formed by quaternary ammonium cations. Quaternary salts that are used include 2.3-epoxy propyl trimethyl ammoniumchloride (EPTAC, also known as or Glytac Quab) and (3-chloro-2-hydroxypropyl) trimethyl ammonium chloride (CHPTAC, also known as Quat 188).
Mineral Fillers
China Clay, Calcium carbonate
Coating binders
Styrene butadiene latex, Styrene acrylic, dextrin, oxidized starch
Pulping chemicals
For the production of chemical pulp from wood chips, following chemicals can be used:
Caustic soda, Sodium sulfide for the Kraft process
Sulfurous acid for the Sulfite process
Caustic soda, Anthraquinone for the Soda pulping
Bleaching chemicals
Sodium dithionite, Chlorine dioxide, Hydrogen peroxide, Ozone
Bleaching additives
Sodium silicate
Sequestering agents: EDTA, DTPA

China Leading PAPER MACHINE manufacturer,stock preparation equipments,cylinder mould paper machine,fourdrinier paper machine,paper making machine,toilet paper machine, toilet tissue paper making machine,corrugated paper machine, A4 copy paper machine,Kraft paper machine, writing paper machine,printing paper machine,etc.

Paper Types-Tissue paper

webadmin — Sat, 10 Feb 2024 05:14:58 +0000

Tissue pper is a lightweight paper or, light crepe paper. Tissue can be made both from virgin and recycled paper pulp.
Properties
Key properties are: Absorbency, basis weight, thickness (bulk), brightness, stretch, appearance and comfort.
Production
Main article: Fourdrinier machine
Tissue paper is produced on a paper machine that has a single large steam heated drying cylinder (yankee dryer) fitted with a hot air hood. The raw material is paper pulp. The yankee cylinder is sprayed with adhesives to make the paper stick. Creping is done by the yankee’s doctor blade that is scraping the dry paper off the cylinder surface. The crinkle (creping) is controlled by the strength of the adhesive, geometry of the doctor blade, speed difference between the yankee and final section of the paper machine and paper pulp characteristics.
The highest water absorbing applications are produced with a through air drying (TAD) process. These papers contain high amounts of NBSK and CTMP. This gives a bulky paper with high wet tensile strength and good water holding capacity.The TAD process uses about twice the energy compared with conventional drying of paper.
The properties are controlled by pulp quality, creping and additives (both in base paper and as coating). The wet strength is often an important parameter for tissue paper.
Applications
Hygienic tissue paper
Hygienic tissue paper is commonly used for facial tissue (paper handkerchiefs), napkins, bathroom tissue and household towels. Paper has been used for hygiene purposes for centuries, but tissue paper as we know it today was not produced in USA before the mid-1940s. In Western Europe large scale industrial production started in the beginning of 1960s.
Facial tissues
A box of facial tissues
Facial tissue (paper handkerchiefs) refers to a class of soft, absorbent, disposable paper that is suitable for use on the face. The term is commonly used to refer to the type of facial tissue, usually sold in boxes, that is designed to facilitate the expulsion of nasal mucus from the nose although it may refer to other types of facial tissues including napkins and wipes.
The first tissue handkerchiefs were introduced in the 1920s. They have been refined over the years, especially for softness and strength, but their basic design has remained constant. Today each person in Western Europe uses about 200 tissue handkerchiefs a year, with a variety of ‘alternative’ functions including the treatment of minor wounds, the cleaning of face and hands and the cleaning of spectacles.
The importance of the paper tissue on minimising the spread of an infection has been highlighted in light of fears over a swine flu epidemic. In the UK, for example, the Government ran a campaign called Catch it, bin it, kill it, which encouraged people to cover their mouth with a paper tissue when coughing or sneezing.
Paper towels
Paper towels are the second largest application for tissue paper in the consumer sector. This type of paper has usually a basis weight of 20 to 24 g/m2. Normally such paper towels are two-ply. This kind of tissue can be made from 100% chemical pulp to 100% recycled fibre or a combination of the two. Normally, some long fibre chemical pulp is included to improve strength.
Wrapping Tissue
Wrapping tissue is a type of thin, translucent paper used for wrapping presents and cushioning fragile items.
Toilet Tissue
Rolls of toilet paper have been available since the end of the 19th century. Today, more than 20 billion rolls of toilet tissue are used each year in Western Europe.
Table napkins
Table napkins can be made of tissue paper. These are made from one up to four plies and in a variety of qualities, sizes, folds, colours and patterns depending on intended use and prevailing fashions. The composition of raw materials varies a lot from deinked to chemical pulp depending on quality. Tablet tissue papers also available in the market.
The Industry
Out of the world’s estimated production of 21 million tonnes of tissue, Europe produces approximately six million tonnes.
The European tissue market is worth approximately 10 billion Euros annually and is growing at a rate of around 3%. The European market represents around 23% of the global market. Of the total paper and board market tissue accounts for 10%. In North America, people are consuming around three times as much tissue as in Europe.[7]
In Europe, the industry is represented by The European Tissue Symposium (ETS), a trade association. The members of ETS represent the majority of tissue paper producers throughout Europe and about 90% of total European tissue production. ETS was founded in 1971 and is based in Brussels since 1992.
Sustainability
The paper tissue industry, along with the rest of the paper manufacturing sector, has worked hard to minimise its impact on the environment. Recovered fibres now represent some 46.5% of the paper industry’s raw materials. The industry relies heavily on biofuels (about 50% of its primary energy) and it is highly energy-efficient. Its specific primary energy consumption has decreased by 16% and the specific electricity consumption has decreased by 11%, due to measures such as improved process technology and investment in combined heat and power (CHP). Specific carbon dioxide emissions from fossil fuels decreased by 25% due to process-related measures and the increased use of low-carbon and biomass fuels. Once consumed, most forest-based paper products start a new life as recycled material or biofuel
EDANA, the trade body for the non-woven absorbent hygiene products industry (which includes products such as household wipes for use in the home) has reported annually on the industry’s environmental performance since 2005. The industry’s impact on the environment is, in fact, relatively small. For example, less than 1% of all commercial wood production ends up as wood pulp in absorbent hygiene products. In addition, the industry contributes less than 0.5% of all solid waste and around 2% of municipal solid waste (MSW) compared with paper and board, garden waste and food waste which each comprise between 18 and 20 percent of MSW.
There has been a great deal of interest, in particular, in the use of recovered fibres to manufacture new tissue paper products. However, whether this is actually better for the environment than using new fibres is open to question. A Life Cycle Assessment study indicated that neither fibre type can be considered environmentally preferable. In this study both new fibre and recovered fibre offer environmental benefits and shortcomings.
Total environmental impacts vary case by case, depending on for example the location of the tissue paper mill, availability of fibres close to the mill, energy options and waste utilization possibilities. There are opportunities to minimise environmental impacts when using each fibre type.
The Confederation of European Paper Industries has published reports focusing on the industry’s environmental credentials. In 2002, it noted that a little over 60% of the pulp and paper produced in Europe comes from mills certified under one of the internationally recognised eco-management schemes.There are a number of ‘eco-labels’ designed to help consumers identify paper tissue products which meet such environmental standards. Eco-labelling entered mainstream environmental policy-making in the late seventies, first with national schemes such as the German Blue Angel programme, to be followed by the Nordic Swan (1989). In 1992 a European eco-labelling regulation, known as the EU Flower, was also adopted. The stated objective is to support sustainable development, balancing environmental, social and economical criteria.

Paper Types-Coated paper

webadmin — Wed, 10 Jan 2024 05:12:50 +0000

Coated paper is paper which has been coated by a compound or polymer to impart certain qualities to the paper, including weight, surface gloss, smoothness or reduced ink absorbency. Kaolinite, calcium carbonate, Bentonite, talc…are used to coat paper for high quality printing used in packaging industry and in magazines. The chalk or china clay is bound to the paper with synthetic viscofiers, such as styrene-butadiene latexes and natural organic binders such as starch. The coating formulation may also contain chemical additives as dispersants, resins, PE: to give water resistance and wet strength to the paper,or to protect against ultraviolet radiation.
Varieties
Machine-finished coated paper
Machine-finished coated paper (MFC) has a basis weight of 48-80 g/m2. They have good surface properties, high print gloss and adequate sheet stiffness. MFC papers are made of 60-85% groundwood or TMP and 15-40% chemical pulp with a total pigment content of 20-30%. The paper can be soft nip calendered or supercalendered.These are often used in paperbacks.
Coated fine paper
Coated fine paper or woodfree coated paper (WFC) are mainly produced for offset printing:
Standard coated fine papers
This paper quality is normally used for advertising materials, books, annual reports and high quality catalogs. Grammage ranges from 90-170 g/m2 and ISO brightness between 80-96%. The fibre furnish consists of more than 90% chemical pulp. Total pigment content are in the range 30-45%, where calcium carbonate and clay are the most common.
Low coat weight papers
These paper grades have lower coat weights than the standard WFC (3-14 g/m2/side) and the grammage and pigment content are also generally lower, 55-135 g/m2 and 20-35% respectively.
Art papers
Art papers are one of the highest quality printing papers and are used for illustrated books, calendars and brochures. The grammage varies from 100 to 230 g/m2. These papergrades are triple coated with 20 – > 40 g/m2/side and have matte or glossy finish. Higher qualities often contain cotton.
Others
Other types of paper coatings include polyethylene or polyolefin extrusion coating, silicone, and wax coating to make release liners, paper cups and photographic paper. Biopolymer coatings are available as more sustainable alternatives to common petrochemical coatings.

Duplex Board

webadmin — Mon, 20 Nov 2023 08:47:17 +0000

A duplex board is a sheet of double-ply paper, similar to the kind of thick paper used to make cards. Duplex board is often used in packaging and has a distinctly smooth, almost waxy feel.
Duplex board is a kind of paperboard or cardboard. It is called duplex board because it is made up of two layers, or plies. The exterior of the board is very often coated to make it more water-resistant and to give it a glossy sheen, but even uncoated duplex board is strong enough to make disposable cups.
Duplex board is tough, thin and able to take on a bright white appearance, unlike common corrugated cardboard. It is commonly used to create boxes for a variety of small goods. For example, it is often used in pharmaceutical packaging. It is also used to make garment boxes and cigarette packs, paper plates and cups, and in the food industry.
Milk cartons can be made out of duplex board, and wines and liquors packaged in boxes may be inside duplex board containers. Duplex board used in the food industry is not made from recycled paper for hygiene reasons, but sometimes waste paper is used when the board is designated for other purposes.
Other common uses for duplex board is match boxes, book covers, and greeting cards. This kind of duplex board is relatively lightweight.

Paper Types-Crepe paper

webadmin — Wed, 10 May 2023 05:08:47 +0000

Crepe paper is tissue paper that has been coated with sizing (a glue-like substance) and then creped (creased in a way similar to party streamers) to create gathers.
Production
Paper that is creped is produced on a paper machine that has a single large steam-heated drying cylinder (yankee) fitted with a hot-air hood. The raw material is paper pulp. The Yankee cylinder is sprayed with adhesives to make the paper stick. Creping is done by the Yankee’s doctor blade that is scraping the dry paper of the cylinder surface. The crinkle (creping) is controlled by the strength of the adhesive, geometry of the doctor blade, speed difference between the yankee and final section of the paper machine and paper pulp characteristics.
Properties
Crepe paper and tissue are among the lightest papers and are normally below 35 g/m2.
The Crepe ratio reflects how much the paper has shortened during creping. The figure is normally between 10 – 30%. Creping is used to adjust the paper’s stretch and thickness, both of which have a marked effect on softness and absorbency.
Creping can also be applied to specialty papers, such as microcreping in sack paper.
Applications
Crepe paper is popular for streamers and other party decorations.
Props and costume accessories can be made of Crepe paper. It can be soaked in a small amount of water to create a dye for Easter eggs, white cardstock, and other materials
Crepe paper can also be used to make paper flowers, appliqu, and paper sculpture.
Crepe paper is important as the backing for various types of tape, including masking tape and electrical tape.
Can be used in place of corn husks to make tamales.
In the former Soviet Union, undyed, unbleached Crepe paper is widely used for toilet paper
Used in recovery systems in small model rockets.
Crepe paper is one of the main components used in costume building for Junkanoo the most popular street parade in the Bahamas.

Paper Types-copy paper

webadmin — Fri, 10 Jun 2022 05:07:33 +0000

Copy paper
Copy paper is used for copying and laser printers. The basis weight is 70-90 g/m² and ISO brightness 80-96%. It is made of 90 C100% virgin chemical pulp or 100% deinked pulp with total pigment content of 10-15%. The most important quality is smooth run in a copying machine / printer and good dimensional stability. It must not show curling nor cockling nor retain dust.