Characteristics
Kraft paper is a tough, water-resistant packaging paper that is brownish yellow and has a wide range of uses. It is commonly used in paper bags, envelopes, workbooks, record covers, dossier and sandpaper. The quantitative range is from 80 g/m2 to 120 g/m2. There are differences between single-sided, double-sided and striped in web and flat paper. The main quality requirements are flexible and strong, with high bursting resistance, and can withstand large tensile forces and pressure without breaking. Kraft paper has a high tensile force, such as single light, double light, stripes, no grain, and the like. Mainly used for wrapping paper, envelopes, paper bags, etc. and printing machine drum lining.
Classification
Kraft paper usually maintains its yellow-brown color and is suitable for bags and wrapping paper. Kraft paper has different uses depending on its nature and use. Kraft paper is a general term for a piece of paper. There is no specific specification. It is generally classified according to its nature and use.
According to the color, it can be divided into: original color kraft paper, red kraft paper, white kraft paper, flat kraft paper, single-light kraft paper, two-color kraft paper, and the like.
According to the different uses, it can be divided into: packaging kraft paper, waterproof kraft paper, moisture-proof kraft paper, anti-rust kraft paper, pattern kraft paper, process kraft paper, insulated kraft paperboard, leather stickers and so on.
According to the different materials, it can be divided into: recycled kraft paper, cowhide core paper, cowhide base paper, rough kraft paper, cowhide wax paper, wood pulp kraft paper, composite kraft paper and so on.
Effect
With the strengthening of environmental awareness, the color paste products are used as environmentally-friendly papers, and the dosage is increasing year by year, and the market prospect is promising. Exquisite kraft paper is suitable for all kinds of high-end goods packaging, such as wine boxes, sportswear and other gift boxes; portfolios, such as cultural and educational health, archives of enterprises and institutions; standard envelopes, such as common postal seals; Bags, such as shopping malls, shopping bags commonly used in brand stores or for linerboard paper.
When autoclaving the microbial culture medium, use a moisture-proof paper or kraft paper to wrap the test tube tampon with the nozzle facing up to prevent the tampon from getting wet during sterilization. Kraft paper is used because it can be effectively waterproofed to ensure that the test tube is not wet.
Advantage
1. The paper is flat and clean. Do not allow folding, wrinkles, holes, sand, etc. to avoid affecting the quality of the platen.
2. The hot pressing elasticity is good and the flatness is high, which significantly improves the pressing quality and improves the product yield.
3. The heat transfer performance is stable, uniform and non-fluctuating, and the heat transfer rate is moderate.
