Technical analysis of paper packaging made of the

Technical analysis of paper packaging made of sandwich corrugated board

preface

China uses forest resources as packaging materials, while European and American countries and regions have strict requirements for the packaging of imported goods: first, it is strictly prohibited to use white light foam, and all packaging products need to pass the inspection of diseases and pests. For wood packaging, It is more important to analyze the fracture surface (it all depends on personal preferences and requires fumigation and disinfection. The current packaging situation is that corrugated boxes are mostly used to pack small mechanical products such as food, beverages, clothing, medicine and daily necessities, while mechanical and electrical products such as air compressors, automobile engines, program-controlled exchanges and motorcycles are generally packed with wood and plastic products, and large household appliances such as motors and refrigerators need to be supported by light foam padding in ordinary corrugated boxes Protection

although corrugated board and corrugated box, which are widely produced and used in China, have incomparable advantages over other packaging materials, such as environmental protection, recyclability, strong printability, light weight, low cost, folding and easy molding, they can be used as ideal packaging materials/containers, But at the same time, it also has fatal defects: the strength of the technology they are developing is not high, especially after the carton is damp. In this regard, paper packaging is not comparable with wood packaging and plastic packaging. Due to the low strength of ordinary corrugated packaging boxes and the collapse of the boxes due to dampness, claims are often caused by the damage of the contents. The problem of poor packaging restricts the export quantity of some products to a certain extent

with the rapid development of China's national economy, especially after China's accession to the WTO, the export of various goods is increasing, and the demand for various packaging is also increasing. How to design and manufacture high-strength packaging products with paper as the material, and more widely realize the substitution of paper for wood and paper for plastic in the packaging field, whether from reducing the logging of limited forest resources, maintaining ecological balance, reducing pollution, protecting the human living environment, or reducing the damage of commodities in the process of circulation and transportation, so that the packaging really plays a role in protecting the contents, has extremely important and far-reaching significance

Guilin Chenguang paper products Co., Ltd. has continuously summarized its experience in long-term production practice, and recently developed a kind of packaging material and packaging products with independent intellectual property rights with novel structure and wide applicability: all paper, high-strength reinforced sandwich corrugated cardboard (commonly known as "corrugated" cardboard), as well as top and bottom swing cover packaging cartons and plug-in packaging boxes made of this cardboard

characteristics and uses of reinforced sandwich corrugated board

1. Environmental protection and low cost

all the materials of reinforced sandwich corrugated board and its packaging products are corrugated paper and box board paper, so it is more widely realized to replace wood and plastic with paper, reducing the use of wood and non degradable light foam, which is conducive to ecological balance and environmental protection; At the same time, the reinforced sandwich corrugated board and its products have the advantages of ordinary corrugated board recyclable, light weight, printable, foldable, good cushioning performance, low cost and so on

2. Reasonable structure and ultra-high strength

the reasonable structure makes the reinforced sandwich corrugated board have high strength. After inspection and measurement, the total thickness of the board is 3.2cm (the thickness can be adjusted at will), the corrugated density of the interlayer is Leng/m, the surface layer is five layers (quantitative 780g/m2) of ordinary corrugated board (C Leng B Leng), and the inner layer is three layers (quantitative 470g/m2) of ordinary corrugated board (C Leng), The interlayer is three layers (quantitative 680g/m2) of ordinary corrugated board (B-BEAM), and the total paper quantity is g/m2

(1) edge compression strength> 7350n/m2

(2) flat compression strength> 129850n/m2

(3) bursting strength (to be tested)

(4) bending strength (to be tested)

(5) dynamic cushioning (to be tested)

compared with ordinary five layer corrugated board, many physical indexes are several times or even more than ten times higher than ordinary corrugated board

compared with the same quantitative honeycomb paperboard, the comprehensive index of reinforced sandwich corrugated paperboard is better

3. Improve efficiency and facilitate disassembly

it is easy to connect with ordinary corrugated board (3 layers, 5 layers, 7 layers) to make packaging containers for various purposes. For example: (1) using "reinforced sandwich corrugated board" to make the top and bottom swing cover box for the indoor unit of cabinet air conditioner, due to its compact structure (now it is composed of seven pieces into two pieces), it can reduce the direct packaging cost by%, and reduce the indirect packaging cost by% (packaging efficiency, packaging labor, transportation quantity, storage cost, sealing tape, packaging bags, etc.). At the same time, because the front is seamless without nails, the integrity and beauty of the container are improved

(2) the bolt bottom support type packing box designed and manufactured with reinforced sandwich corrugated board for outdoor air conditioners, refrigerators, color TVs, motorcycles and electromechanical products, with a bottom bearing of up to 200kg. The biggest feature of this box is that it uses the corrugated gap between the "tile in the tile" cardboard interlayer, and uses the bolt (the bolt material can be wood, bamboo, plastic or paper tube) to connect with the bottomless box, which greatly facilitates the packing and unpacking process of heavy items, especially color TVs. At present, ordinary parcel post cartons are generally used for the packaging of color TVs below 34 inches. In the process of sales, color TVs must be lifted out of the box for display and debugging to show users, It is troublesome and unsafe to carry it into the box after looking, which is extremely inconvenient to promote the healthy, continuous and rapid development of the industry

(3) use reinforced sandwich corrugated board. Because it has good flat compression and bending strength, if it is connected with the paper pipe and made into a legged bracket, it can completely replace the wooden bracket, and can be transported by forklift or trailer

(4) taking advantage of the good edge pressing strength of the sandwich corrugated board and the structure of the five layer paperboard of the face paper, the slotted insertion method can be used, or the characteristics of the five layer paperboard that is easy to press lines and turn can be used to make flat and right angle support plates. If the surface layer paperboard is two layers (corrugated outward), the shockproof and cushioning performance is more ideal

4. Low technical difficulty and less equipment investment

because "reinforced sandwich corrugated board" is a kind of board originated from ordinary corrugated board, and its main material is ordinary corrugated board, it is very suitable for enterprises producing corrugated packaging now

process, process flow and equipment

1. Process

1. An American trader said (1) the corrugated board production line produces corrugated board with surface layer, inner layer and interlayer according to the required specifications

(2) sandwich corrugated board (three-layer, B-line, base paper quantitative gram/m2 ordinary corrugated paper), on the professional cutting machine, according to a certain interval distance, the front and back sides are vertically cut in the corrugated direction (cut off two layers, leaving only one layer for connection)

(3) the chemically cut corrugated board is mounted with the inner layer on a special glue forming machine (equivalent to single-sided corrugated)

(4) trim the edges of the mounted paperboard on the slitter and cut it according to the required specifications (if only making paperboard, this process should be carried out after the surface layer is mounted)

(5) mount it with the corrugated board on the surface layer on the ordinary gluing machine. If the surface layer is used as the outer layer of the packing box (generally it should be 5 layers of corrugated cardboard), it can go through the processes of printing, pressing, die cutting or slotting like ordinary corrugated cartons

2. Process flow

3. Equipment required

(1) five layer corrugated board production line

(2) specialized cutting machine

(3) special molding and mounting machine

(4) printing machine, slotting machine

(5) die cutting machine

(6) ordinary mounting machine

(7) slitter

cost statistics

1. Materials (three-layer corrugated board)

(1) three-layer corrugated board (C or B corrugated board, 175g Kraft for face paper, 180g vermicelli for lining paper, 127g corrugated paper) 1.65 yuan/single M2 × 2 = 3.58 yuan/double M2

(2) corrugated sandwich layer, the surface, lining and corrugated paper are 127g corrugated paper, 1.28 yuan × 1.6=2.05 yuan/m2

2. Processing fee (chemical cutting, forming, mounting, slitting)

(1) auxiliary materials: 0.54 yuan/m2

(2) utilities: 0.05 yuan/m2

(3) management fee: 0.25 yuan/m2

(4) profit: 0.80 yuan/m2

(5) tax: 0.22 yuan/m2

& NB