Among the four pillar packaging materials of paper, plastic, metal and glass, paper products have the fastest growth and the cheapest price. It can be recycled or used as plant fertilizer and can purify the environment. So, how will paper packaging materials develop? The views of experts are as follows:

one

High quality and lightweight of packaging paper, paperboard and containerboard

In order to make full use of natural resources and reduce the cost of mail and transportation as much as possible, it is the development trend of paper products all over the world to produce a variety of paper, paperboard and packaging paperboard with low quantity. China has put forward the problem of low ration in newsprint, relief and offset printing paper, paper bag paper and so on, and has begun to solve it. In packaging paper and paperboard and other products should also achieve high quality lightweight and variety diversification.

In particular, corrugated base paper and kraft liner board, which are the most widely used, should be added with three low quantitative products on the premise of properly improving the quality of the original products according to the large demand for high-grade packaging boxes in the domestic market, that is, corrugated base paper should be added with a variety of 100g / m2, kraft paperboard with two varieties of 21g / m2 and 200g / m2.

two

Research and development of functional cardboard for food packaging

At present, the variety of Whiteboard in China is single, there is no classification for different packaging materials, and there is no special food packaging board for different food needs. Although there are regulations on the raw materials and hygienic indexes of food packaging paper in China, there are no kinds of paperboard specially used for food packaging. Due to the non oil resistance of the packaging paperboard for pastry box, fast food box and other direct entry food, the phenomenon of oil leakage is quite common after packaging oily food.

In the future, special functional cardboard should be developed and produced for different foods, such as cartons and paperboards for directly imported foods such as cakes, paper cans and paperboards for semi-finished foods for steaming and baking, and paper cans and paperboards for milk and fruit juice.

three

Developing composite paper bags

1. Small cement bags, i.e. 25-40kg cement bags, can be packed with two layers of paper instead of four layers of paper due to their light weight and less damage during transportation. The ration of cement bag paper can be changed from 80g / m2 to 90-100 / m2.

2. With the reform of China's grain supply and marketing system, small grain packaging paper bags of 5kg, 10kg and 20kg are more suitable for the needs of consumers' daily life. It is suggested to produce small food (rice, rice, etc.) packaging bags with double kraft paper bags instead of cloth bags and plastic woven bags which are easy to grow insects and absorb moisture and mildew.

four

Development of plant fiber fast food box

With the enhancement of people's environmental awareness and the actual needs of life, disposable paper fast food boxes and other food packaging products are popular. However, the cost of paper fast food box is high, so it is necessary to develop fast food box with straw, wheat straw, bagasse, chaff and other crop fibers as raw materials. This kind of products are competitive in price. After being used and degraded, they can raise fertile soil and be collected as livestock feed. The resources are fully utilized and have good economic and social benefits.

five

Research and development of natural green packaging materials

Natural plant fibers (straw, wheat straw, cotton stalk, chaff, etc.) can be used as fast food boxes, and can also be rolled or woven into convenient bags. Some natural plant fibers are long and strong, and can be easily woven into straw bags. Bamboo, natural shrubs, wicker, etc. can also be woven into baskets, baskets and other packaging containers or made into natural bamboo tubes to hold fruits, vegetables, tea, etc, The bamboo plywood packing box can be used for the transportation and packaging of machinery, electrical appliances and other equipment. Natural mineral materials such as clay, ceramics can be made into wine, tea, etc. packaging, rock particles will be expanded into light weight perlite, adding a little adhesive, can be made into different shapes of cushioning packaging.

six

Development of straw pulp based disposable tableware special cardboard

The main technical features are as follows:

1. Based on China's raw material resources, aiming at the shortcomings of straw pulp raw materials, this paper adopts the optimization application technology of chemical additives to improve the quality of straw pulp, so as to ensure that its performance is close to the physical properties of wood pulp.

2. The surface of the paperboard is treated for food packaging, so that the finished paperboard has the functions of hot water resistance, non leakage, non stratification, oil resistance and heat sealing. The economic and reasonable method is to use the original bleached straw pulp to produce paper tableware, and then recycle the waste tableware to produce non food packaging paper, so as to make full use of fiber resources without polluting the environment and increasing the pulping load. At the same time, it can further reduce the production cost of tableware paperboard and recycled paper, and alleviate the increasingly tense problem of pulp raw materials.

seven

Development and application of honeycomb sandwich board

With honeycomb sandwich paper as the main material, there are three types of LSQ packing boxes I, II and III.

Lsqi type is also called composite material packing box. The outer layer of the box is made of fibreboard or plywood with strong puncture resistance, the middle layer is made of honeycomb paper core, and the inner wall is made of straw board; LSQ Ⅱ is a full honeycomb paperboard packing box, which is made of honeycomb paper as the core and bonded with cardboard inside and outside. It is an ideal packing for high-grade fragile goods; LSQ - Ⅲ liner type packing box is made of corrugated box with honeycomb paperboard as liner. It has strong shock resistance, compression resistance, heat preservation and puncture resistance.

The results show that the damage rate of fragile items in honeycomb paperboard packaging box is 50% - 97% lower than that in wooden box and corrugated box respectively; A 600kg weight is placed on the empty box for three months without deformation and polystyrene liner; Compared with the corrugated box of the same specification, the weight ratio is 2:5, which can save 60% paperboard; The price is 28% lower than that of wooden cases of the same specifications. This new type of carton will become the ideal packaging for China's export commodities. Its popularization and application will play a positive role in reducing the damage rate of commodities in the circulation process and improving the quality of packaging products.

eight

Development and application of molded pulp products

Pulp molding is a three-dimensional papermaking technology. It takes waste paper as raw material and moulds a certain shape of paper products by a special mold on the molding machine.

It has four advantages

1. The raw material is waste paper, including board paper, carton paper, white edge paper, etc;

2. The production process is completed by pulping, adsorption molding and drying, which is harmless to the environment;

3. It can be recycled;

4. The volume is smaller than that of foamed plastics, can be overlapped, and the transportation is convenient. Pulp molding is not only used for lunch boxes and tableware, but also for industrial cushioning packaging.