Dongguan Lehe Paper Industry Co., Ltd., located in Jiuqu Industrial Zone, Jiuqu Village, Daojiao Town, Dongguan City, is a company specializing in all kinds of packaging and printing paper. The company mainly deals in one-time molding gray board paper, composite gray board paper, laminated board, black cardboard and other gift packaging paper.
The company's main customer base includes major printing and processing plants, gift packaging plants, hardware plants, electronics plants, leather goods plants furniture Factory, clothing factory and other industries. The company takes "quality assurance, professional service, customer satisfaction" as its business purpose, adheres to the business philosophy of "service first, customer first", advocates the corporate energy culture of "integrity, dedication, unity, and struggle", and strives to unremittingly provide customers with high-quality products and sincere, professional services. Today, we pursue "integrity, dedication, unity The enterprise culture of "Strive" is constantly pioneering and innovating. With customer service as the core, quality as the life, and users as the important position, we are dedicated to providing you with cost-effective packaging cardboard and meticulous service. We are willing to work with cooperative manufacturers and customers to create a win-win situation, and we are willing to make every effort to build an honest and orderly packaging paper market!
Grey cardboard
Grey cardboard is a kind of cardboard produced from recycled paper. The products are divided into single ash, double ash and full ash, which belong to environmental protection packaging materials. Main use of the product: packaging Box , advertising boards, folders, photo frame backboards, bags, hardcover books, storage boxes, samples, lining plates, partitions, etc.
Cardboard characteristics:
- Quantitative, which refers to the weight per unit area of the paperboard, expressed in g/m ², that is, the gram weight of one square meter of paperboard. The paper weight determines the physical properties of paper, such as tensile strength, tearing strength, tightness, stiffness and thickness.
- Thickness, which is the thickness of the paper, usually expressed in mm. The thickness is closely related to the ration and tightness. Generally speaking, the paper thickness is large, and its ration is relatively high, but the relationship between the two is not. The tightness of the fiber structure of paper determines the weight and thickness of paper, so although some papers are thin, their weight is equal to or more than that of the thicker ones. From the perspective of use effect, it is very important that the thickness of paper is uniform.
- Tightness refers to the weight of paper per cubic centimeter, expressed in g/cm ³. The tightness of paper is calculated by the ration and thickness according to the following formula: D=G/d * 1000, where G represents the ration of paper; G is the thickness of the paper.
- Stiffness refers to the resistance of the paper to the collapse of another object, and it is also the rough and hard performance of the paper fiber preparation.
- Smoothness, which refers to the degree of concavity and convexity of the paper surface, expressed in seconds and measurable. The detection principle is: under a certain vacuum and pressure, the air of a certain solvent passes through Glass The time taken for the gap between the plate surface and the specimen surface. The paper surface is smooth, and the slower the air passes through.
- Water content, the water content in the paperboard. Generally, the water content of standard double gray paperboard is 8-12%.
- Vertical and horizontal, also called positive and negative, refers to the direction in which the paper fibers are arranged. The direction of fiber running along the paper machine is the longitudinal direction of the paper, and the direction perpendicular to the longitudinal direction is the transverse direction. The deformation value of longitudinal paper grain is small, and the stretch variation is large during the use of transverse paper grain.
