The characteristics of tissue paper

Tissue paper has been an important part of the papermaking industry for many years. Today, the continuous growth in the production capacity of colored tissue paper is achieved through new technologies that meet the quality of the product. The development of multi-layer pulp box provides the opportunity to use different primary fibers and secondary fibers at the same time in the production of sheet paper and makes the final products multi-functional. In a multi-layer head box, a single layer of paper is usually formed by a combination of two ingredients or three layers of fiber. 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.

In addition to the use of multi-layer head box, concentration dilution distribution technology can reduce the quantitative change of paper pages. This technology can easily be used after modification of the existing paper machine. Especially for multiple layers. The quantitative distribution can be reduced from 2.0% to 1% by using the concentration dilution and distribution technique in the head box. Reduce the quantitative fluctuations of the page and produce a uniform sheet of paper.

Crepe paper sheets

Tissue paper is a lightweight paper or, light crepe paper. Tissue can be made both from virgin and recycled paper pulp.
Key properties are: strength, absorbency, basis weight, thickness (bulk), brightness, stretch, appearance and comfort.

Do you know these knowledge points about EVA

EVA is a kind of material that we often see in our lives, but many people are not particularly familiar with EVA. What kind of material is EVA foam? What are the uses of EVA? Next, this article will tell you about EVA. Information.

1. What is EVA material?

EVA is a very common material. It has vinyl acetate monomer in its composition, which improves flexibility and impact resistance, compatibility, and heat tight sealing performance. It has good cushioning, shock resistance, heat insulation and moisture resistance. It is extremely resistant to corrosion and is non-toxic and non-absorbent. Most of the slippers sold in the mall are made of eva foam sheets and rubber. It is a relatively common midsole material. It usually has a strong cushioning function and function, but this material is very slippery, so it is usually mixed with hard rubber. Use.

2. What are the usages of EVA?

EVA has strong water resistance, can close the cell structure, and has strong non-absorbent and moisture-proof properties.

EVA is very resistant to corrosion: corrosion, alkali and acid.

EVA's precision processing: no joints, easy to heat compression, split, paste and other processing.

EVA anti-vibration: high shock resistance and cushioning performance.

The EVA resin is an ethylene-vinyl acetate copolymer, and the content of vinyl acetate (VA) is generally 5% to 40%. Compared with polyethylene, EVA is widely used in foaming shoes due to the introduction of vinyl acetate monomer in the molecular chain, which reduces high crystallinity, improves flexibility, impact resistance, filler compatibility and heat sealing performance. Materials, functional shed film, packaging film, hot melt adhesive, wire and cable and toys. In general, the performance of EVA resins depends primarily on the content of vinyl acetate on the molecular chain.

Regarding the materials of EVA and the use of EVA, through the reading of the article, everyone has already had a certain understanding and understanding of this material of EVA. I hope this chapter can help everyone.

The usage of corrugated paper

Type A corrugated and type B corrugated boxes are generally used for transporting outer packaging boxes, and beer boxes are generally made of B. E is used as a one-piece box with certain aesthetic requirements and appropriate weight contents. F-shaped corrugated and G-shaped corrugated wags are called mini corrugated paper, which is a very thin corrugated, used as food for hamburgers, cream fillings, etc. Disposable packaging containers, or used as micro-electric products such as digital cameras, portable stereos, and packaging for refrigerated goods.

Corrugated paperboard began in the late 18th century. At the beginning of the 19th century, due to its light weight and low price, it was widely used, easy to manufacture, and can be recycled or even reused, which led to a significant increase in its application.

By the beginning of the 20th century, it has been widely popularized, promoted and applied for packaging and packaging of various commodities. Since packaging containers made of color corrugated cardboard have unique properties and advantages for beautifying and protecting the interior goods, they have achieved great success in competition with various packaging materials. It has become one of the main materials for making packaging containers that have been used up to now and are rapidly developing.

Processing method of embossed paper

Embossed paper is a method of mechanically embossing or creping paper to form a concave-convex pattern on the surface of paper or paperboard. The embossed paper is embossed to enhance its decorative effect and make the paper more textured. In recent years, embossing on the surface of printing paper has become more and more common. Offset paper, coated paper, whiteboard paper, white cardboard and color dyed paper have been embossed into embossed paper, which can greatly improve the grade of paper and paper. Sales bring higher added value.

There are two ways to process embossed paper. After the paper is produced, the pattern is mechanically added to become embossed paper. Secondly, after the sheet of plain paper is dried, it is placed in an embossing machine for further processing, and then pressed by two rollers, one of which is engraved. There is an embossed pattern, and the paper will be imprinted as a pattern after passing through it. Since the texture of the embossed paper is deep, it is usually only one side of the paper. Since the embossed paper has uneven surface, the print ability is affected to some extent.

Therefore, embossing can be performed not only before printing but also after printing. Many papers used for flexible packaging often use embossing before or after printing to improve the visual effect of packaging and decoration and increase the value of the product. Therefore, embossing has become an important method for the processing of special paper. Embossing can be divided into two types: plate embossing and non-plate embossing. The so-called plate embossing is to press the printed flower shape into a concave-convex shape to make the pattern bulge, which can play the role of beautiful decoration.

Without the embossing of the plate, the pressed pattern is not directly related to the pattern of the print. There are many types of embossed patterns. Such as cloth, diagonal cloth, straight stripes, yalian net, orange skin, straight net, needle net, egg skin, sack, plaid, leather, scalp, linen, gear stripes. This overprint embossing is widely used in embossed printing paper, coated book paper, patent leather, plastic synthetic paper, plant parchment and other decorative materials.

Most of the domestic embossed paper is pressed from offset paper and whiteboard paper. The surface is rough, textured, expressive and varied. Many art designers prefer to use this type of paper, and use this to make a cover or title page of a book or album to express different personalities. Embossed paper is more expensive because of its small size. Ordinary embossed paper is much more expensive than the same type of similar paper. Therefore, large-volume embossed paper albums can be unacceptable to customers due to price factors, so they are generally only used for the design and printing of covers or important materials.

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How to print on corrugated paper

In the case of corrugated printing, there is no special printing method, and embossing, gravure and offset printing are the main printing methods.

Beer box In the embossing process, before the corrugated paper is processed in the corrugated shape, it is first sent to the flexo printing machine for printing, and then bonded to the corrugated core and another backing paper to form a corrugated packaging material.

Corrugated paper is made of a resin material, whether it is a rotary printing or a single printing. Flexographic printing using water-based inks is an extremely effective printing method, regardless of the smoothness of the liner used to produce printed corrugated paper, which can be printed accurately and at high speed. In addition, the flexo ink has good opacity and can be printed in brilliant colors on the kraft base paper used for the production of cross-cut paper.

In the plate making process of the resin relief used in the past, the cleaning process using an organic solvent is indispensable, and then some media considering environmental compatibility, such as a plate which can be used only by washing, is used from the plate making process; A plate that can be used for development; a plate that uses a liquid photographic material for UV curing (recycling of unsensitized liquid), etc., all of which incorporate environmentally compatible printing methods.

Notes on cellophane

The effect of the change of the cellophane paper force, in the printing process, the film increases with the increase of the tensile force during the printing process, the accuracy of the color printing overprint is difficult, the tensile force is adjusted according to the type and the expansion ratio of the substrate material, for example, the expansion ratio of the PE film is relatively large, and the tensile force value should be small; for a plastic film such as paper or PET, OPP, or the like, the tensile force may be suitably large. the surface is smooth, no capillary pores exist, the ink layer is not easy to be fixed or fixed, and after the first color printing is finished, the ink which is easy to be overprinted by the next color is stuck out, so that the patterns and the characters are not complete, and the defects are caused.

After packing the article with it, it can be anti-rust, damp-proof and anti-pollution. However, the bopp cellophane film has the disadvantages that the longitudinal strength is large, the transverse strength is small, the tearing degree is poor, and the tearing of the glass paper is broken. The glass paper also has the hydrophilicity, so that the water can be absorbed, the adhesion is often caused after the water is treated, and the paper sheets can be easily adhered to the block after being heated. The glass paper is characterized in that the transparency is high, the glossiness is strong, the color of the printed image and text is particularly bright, the plastic film can not be achieved, the printing adaptability is good, no treatment is required before printing, the glass paper also has the antistatic treatment property, the dust is not easy to be adsorbed, and the occurrence of printing faults such as text and text and the like is avoided. but the moisture resistance is poor, the film Under the influence of temperature and humidity, easy deformation, resulting in printing graphics and text is not easy to set up