Domestic and international green packaging industry and development ideas (4)

The Guiding Ideology of the Development of China's Green Packaging Industry

It is an in-depth implementation of the principle of protecting basic national policies and “three synchronizations” (synchronous planning, simultaneous implementation, and simultaneous development). With science and technology as the guide, we will strive to achieve the goal of developing green guarantees, strengthen the development of packaging environmental protection policies and regulations, and create a new environment for packaging and environmental protection. . We must conscientiously implement the strategy of rejuvenating the country through science and technology, implement green packaging projects, and vigorously develop research on green packaging new materials, new technologies, and new designs to promote the sustained, rapid, and healthy development of China's green packaging industry. Therefore, according to the development trend of foreign green packaging industry, the key points and directions for the development of China's green packaging industry products in the future are formulated as follows:

1, paper packaging

(1) High-quality, lightweight technology for packaging paper, board, and linerboard

In order to save and make full use of natural resources and reduce postage and transportation costs as much as possible, a variety of paper, paperboard and carton board are the development trend of paper products in the world. China has proposed low-quantity issues in newsprint, letterpress, offset printing, and paper-bag papers, and has already begun to address it. Among the many uses of paper, packaging paper and paperboard are of high quality, light weight, and variety. In particular, the largest amount of corrugated medium kraft linerboard, according to the domestic market's large demand for high-grade packaging, should be properly improved. Under the premise of product quality, three low-strategy products were added, namely, a new variety of 100 g/M2 for corrugated paper and two new varieties of 210 g/m2 and 200 g/m2 for kraft board.

(2) Research and development of functional special cardboard for food packaging

There is no single type of whiteboard paper currently produced in China, and there is no classification for distinguishing different types of packaging materials. There is no special food packaging board for different foods that require different functions for packaging materials.
Although China's national standards for food packaging papers stipulate that all food packaging paper must not use waste paper and social recycling of waste paper as raw materials, it must meet the national health standards specified in GB11680-89, but it has not been used specifically for food products. Packaging paperboard varieties, a large number of cake boxes, and a variety of food boxes (including oral medicine boxes, etc.) all use gray-white board paper made from waste paper. As for the cardboard boxes that are directly imported into the food boxes such as cake boxes and snack boxes, since they do not have oil-resistance properties, the phenomena of oil seepage after packaging oily foods is quite common.

In the future, we should develop and produce functional cardboard for packaging solid foods and packaged liquid foods for packaging different things. For example, the former can be used to directly import food cartons, such as packaged cakes, salt, and other paperboards that resist light and moisture.

(3) Production Technology of Composite Paper Bags

A. Large-sized cement bags are 25-40kg bags of cement bags, due to their light weight, they are less damaged during transportation. The current four-layer paper bags can be used for two-layer paper packaging. The basis weight of cement bags is 80 g/m2. Changed to 90-100 grams m2.
B. Large Food and Food Bagging: With the reform of China's grain supply and marketing system, small packaging (5, 10, and 20 kg) grain packaging paper bags are more suitable for people's daily needs. It is advisable to produce small-sized food (rice, rice, etc.) bags of double kraft paper bags instead of the custom-made cloth bags and plastic woven bags that are easy to attract bugs and attract moisture.

(4) Development and application of plant fiber snack boxes

With the improvement of people's environmental awareness and the actual needs of life, disposable food cartons and other food packaging products are favored by consumers. However, due to the high cost of paper-based fast food boxes, it is very necessary to develop specifications for the hygienic standards of food packaging paper for straw, wheat straw, sugarcane bagasse, and clam shells.

The plant fiber fast food box is competitive with the paper fast food box and the degradable plastic fast food box in terms of price. The plant fiber snack box can be used to fertilize fertile soil after being degraded, and can also be used as a saving feed for collection. The resources are fully utilized and have good Economic and social benefits.

(5) Development and application of natural green packaging materials

Natural plant fibers (straw, wheat straw, cotton stalks, oyster shells, etc.) can be used as fast food boxes, but they can also be crushed or woven into convenient bags. Some natural plant fibers are long and strong, making them easier to formulate. Bags, bamboo, natural shrubs, wicker fibers, can also be woven into baskets, bowls or other packaging containers or made into natural tubes, containing fruits, vegetables, tea, etc., bamboo offset box can also be used for transportation of machinery, electrical equipment, etc. package.

Natural mineral materials such as clays and ceramics can be packaged into alcoholic beverages, tea leaves, etc. The rock particles are puffed to produce a lighter-weight perlite. After adding a small amount of binder, the same shape of the buffer packaging can be molded.

(6) Produce disposable cutlery paperboard with domestic raw bleached straw as the main raw material

Its main technical features are:

A. Based on the domestic raw material resources, aiming at the shortcomings of the straw pulp raw materials, optimize the application technology with chemical additives for improving the straw pulp treatment to ensure that the straw pulp is close to the physical properties of the wood pulp required for manufacturing the cutlery cardboard.
B. In order to improve the strength of straw pulp to achieve the physical strength of wood pulp, give the pulp to make all the functions that the cutlery board should have.
C. Processing on the surface of the paperboard suitable for food packaging, so that the interior of the finished paperboard has functions of resistance to hot water, no leakage, no delamination, resistance to oil and heat sealing.
D. The waste paper cutlery can be recycled by the paper mill and processed, and quickly decomposed into bleached pulp. As a secondary fiber, it can be re-produced into paper or cardboard for various writing and printing culture papers or other uses.

Therefore, an economical and reasonable method is to use raw bleached straw to produce paper cutlery, and then recycle the waste cutlery to produce non-food packaging paper so that fiber resources can be fully utilized without polluting the environment without increasing pulping load. At the same time, it can further reduce the cost of production of paperboard and recycled paper and alleviate the increasingly tense problem of pulp raw materials.

(7) Non-pollution Plant Separation Process Pulp and Paper Technology

This technology utilizes catalytic separation to separate plant fibers such as rice straw and wheat straw in a steam bulb to produce various kinds of paper (corrugated paper, linerboard, wrapping paper, etc.) and high-strength fiberboard, etc. Non-fibrous parts are treated to obtain plant powder. Instead of using grain as feed, except for the use of small amounts of catalysts in production, no chemical raw materials are added, which saves more water than chemical processes. After the relevant environmental protection department tests the discharged water, the PT value meets the requirements of the state.

(8) Development and Application of Honeycomb Sandwich Board

The honeycomb sandwich paper is used as the main material, and the LSQ wooden packaging boxes are available in I, II and III types.
LSQI type is also called composite material packing box. The outer layer of the box is made of fiberboard or plywood with strong puncture ability, honeycomb paper core in the middle layer and grassboard in the inner wall.

LSQII type is a full-honeyboard cardboard box, which is sandwiched with honeycomb paper, and is made of 300 pieces of cardboard inside and outside. It is an ideal package for high-end fragile goods.

LSQIII inner liner box is made of corrugated paper box. The upper and lower walls of the box are lined with honeycomb paperboard. It has strong shockproof, compressive, thermal and anti-jamming capabilities.

Honeycomb cardboard packaging box has undergone demolition, heavy weight stacking, and actual installation rolling experiments. The breakage rate of interior fragile items is 50%–97% lower than that of wooden boxes and corrugated boxes, and 600 kg weight is placed on empty boxes. Test pressure for three months without deformation, and without polystyrene liner, with the same size of corrugated box weight ratio of 2:5, can save 60% of cardboard, 28% lower than the same price of wooden box.

This new type of carton will become an ideal package for China's export commodities. Its popularization and application will play a positive role in reducing the rate of breakage of goods in circulation and improving the quality of packaged products.

(9) Development and Application of Pulp Molding Technology

Pulp molding is a three-dimensional papermaking technology. It uses waste paper as a raw material to mold a certain shape paper product from a special mold on a molding machine. It has four major advantages:
A. Raw materials are waste paper, including board paper, waste paper box paper, scrap paper, and other sources.
B. Its production process is completed by processes such as pulping, adsorption molding, and drying, and is harmless to the environment.
C. It can be recycled and recycled.
D. The volume is smaller than that of foamed plastic, which can be overlapped and convenient for transportation.
Pulp molding, in addition to lunch boxes, tableware, more industrial buffer packaging, the current development is very rapid.

(10) Corrugated board machinery

Kraft box paper as the main raw material is pressed, crucible, glued and cut to become corrugated cardboard complying with international standards. After printing, die-cutting (grooving) and pasting (sticking) boxes, it becomes corrugated board of various sizes and specifications. Cardboard boxes need to solve the following problems:

A. Using computer technology to achieve automatic conversion of cardboard cutting specifications and save man-hours.
B. Improve the accuracy of the coating machine's machining and control the amount of glue applied.
C. Improve the steam drying system and save energy.
D. Improve cardboard box forming die-cutting machines and printing presses, improve printing and die-cutting accuracy, and increase lifespan.
Corrugated board width according to the corrugated cardboard box unfolded area requirements from 1200mm to 2500mm different specifications, production speed from simple light 60 meters / min to heavy high-speed 300-400 meters / min, reaching the advanced level in Western countries.

(11) color printing carton machinery

Whiteboard paper as the main raw material by color printing, die-cutting, sticking boxes into a package of goods, in addition to printing, die-cutting is a key molding machine for the carton. The die-cutting method includes flat-pressing, round-flattening and round-pressing. The flat-pressure die-cutting die cutter is easy to form and die-cut with its die-cutting plate, and has high die-cutting precision. It is most widely used in the carton industry. The cut area is mainly divided into four open, split and full open specifications. The production rate is represented by flat pressure, 4000-4500 times per hour, and the following problems need to be solved:

A. The carton cutting machine improves the machining accuracy and the working life of the wearing parts, so as to improve the running reliability of the machine.
B. The carton glue box machine is gradually organized according to size and box type.
C. Carton die-cut version uses CNC laser cutting to improve the accuracy of the die-cut carton, which is conducive to the realization of automatic adhesive box and mechanical operation in the subsequent process.

(12) Aseptic Packaging Technology and Machinery

Aseptic packaging technology refers to sterilized foods and beverages, which are packaged in an aseptic environment and sealed in a sterilized container to obtain shelf life without field preservatives or freezing, which maximizes the shelf life. Nutritional components and flavors of food Aseptic packaging machinery includes related machinery and equipment from raw material production, sterilization, packaging and storage.

Usually industrial large-scale packaging containers range 25-100 kg, small living brick, ridge type, cup, pyramid type, capacity range of about 100-1000ml.

According to the long-term development plan of China's food industry, the milk and beverage industry will develop at a high rate of doubling every four years. It will bring a broad market for aseptic packaging and aseptic packaging will be an advanced low-cost packaging technology. The bacteria packaging machinery will adapt to the rapid development of the milk and beverage industry in China.

(13) Flexo printing machine

A printing machine that controls the amount of ink scraped by an anilox roller and an ink roller, a squeegee roller, is used to print a printing plate with a flexible resin material having a different degree of sensitivity through a film. Multi-color (8-10 color) flexographic printing presses and related post-printing mechanical processing, such as: glazing, die-cutting, indentation machinery, ceramic anilox roller and its processing technology, to achieve mechatronics control technology, development Resin plate and printing ink production.

(14) Recovery and Classification of Waste Paper and Paper Products

The recycling and classification of a large number of waste paper and paper products in the society, waste paper is an important renewable resource, developed countries have used the legal situation to recycle waste paper as a national policy.
In China, it is recommended that the classification criteria for waste paper recycling be classified into 6 categories:
A. Cartons waste paper B. Waste newspapers C. Book magazine waste paper D. Printing mill cuts paper edges E. Waste waste paper P. Paper plastic waste paper Recycling one ton of waste paper equivalent to saving 3 cubic meters of society , 1.2 tons of coal, 600 degrees of electricity, 200 cubic meters of water, the waste paper acquisition department of major cities in the country can be adopted

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