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2017
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Eight Future Development Directions for Paper Packaging Materials
Author:
Among the four main packaging materials—paper, plastic, metal, and glass—paper products are experiencing the fastest growth. Paper is the cheapest, recyclable, reusable as plant fertilizer, and environmentally friendly. So, how will paper packaging materials develop? Experts offer the following insights: 1. High-quality lightweight paper, cardboard, and boxboard. In order to make full use of natural resources and reduce postal and transportation costs as much as possible, the production of low-basis-weight various papers, cardboard, and packaging boxboard is the current development trend of paper products in various countries. China has already proposed the issue of low basis weight in newsprint, letterpress and offset printing paper, and paper bags, and has begun to address it.
Among the four main pillar packaging materials—paper, plastic, metal, and glass—paper products have shown the fastest growth. Paper is inexpensive, recyclable, reusable as plant fertilizer, and helps purify the environment. So, how will paper packaging materials develop? Experts' opinions are as follows:
One
High-quality, lightweight packaging paper, paperboard, and containerboard
To make full use of natural resources and minimize postage and transportation costs, producing various types of low-basis-weight paper, paperboard, and containerboard is the current global trend in paper products. China has already raised the issue of low basis weight for newsprint, letterpress and offset printing paper, and paper bags, and has started to address it. High-quality, lightweight and diverse products should also be achieved in packaging paper and paperboard.
Especially for corrugated base paper and kraft linerboard, which are used in large quantities, based on the high demand for high-end packaging boxes in the domestic market, three low-basis-weight products should be added while appropriately improving the quality of existing products. Specifically, one new 100g/m2 variety should be added for corrugated base paper, and two new 21g/m2 and 200g/m2 varieties for kraft linerboard.
Two
Research and Development of Functional Specialty Paperboard for Food Packaging
Currently, China's white cardboard varieties are limited, lacking classification for different packaging materials, and even more so for specialized food packaging paperboard for different foods. While China has regulations on the raw materials and hygiene standards for food packaging paper, there are no specialized paperboard varieties for food packaging, and many food boxes use grey-backed white cardboard. For food boxes such as pastries and fast food containers, which come into direct contact with food, the lack of oil resistance leads to widespread oil leakage when used for oily foods.
In the future, functional specialty paperboard should be developed for different foods, such as paperboard for boxes for pastries and other foods that come into direct contact with food, paper canisters for semi-finished foods for steaming and baking, and paper canisters for milk and fruit juice.
Three
Development of Composite Paper Bags
1. Small cement bags, i.e., 25-40kg cement bags, due to their light weight and reduced damage during handling, can be changed from the current four-layer paper bags to two-layer packaging. The basis weight of cement bag paper can be changed from the current 80g/m2 to 90-100/m2.
2. Small grain packaging bags: With the reform of China's grain distribution system, small packaging of 5kg, 10kg, and 20kg grain packaging bags better suit the needs of daily life for consumers. It is recommended to produce double-layer kraft paper bags for small food (rice, etc.) packaging to replace the commonly used cloth bags and plastic woven bags, which are prone to insect infestation and mildew.
Four
Development of Plant Fiber Fast Food Boxes
With increasing environmental awareness and practical needs, disposable paper fast food boxes and other food packaging products are popular. However, paper fast food boxes are relatively expensive, so it is crucial to develop fast food boxes using agricultural fibers such as rice straw, wheat straw, bagasse, and rice husk as raw materials. These products are price-competitive, nourish the soil after use and degradation, can be used as animal feed, and make full use of resources, with good economic and social benefits.
Five
Research and Development of Natural Green Packaging Materials
In addition to fast food boxes, natural plant fibers (rice straw, wheat straw, cotton stalks, rice husk, etc.) can also be used to make convenient bags by pressing or weaving. Some natural plant fibers are long and strong, making them easier to weave into grass bags. Bamboo, natural shrubs, and willow branches can also be woven into baskets and containers or made into natural bamboo tubes to hold fruits, vegetables, and tea. Bamboo plywood boxes can be used for the transport packaging of machinery and electrical equipment. Natural mineral materials such as clay and ceramics can be used to package wine and tea. Expanded rock particles can be made into lighter-weight perlite, and with the addition of a small amount of binder, it can be made into various shapes of buffer packaging.
Six
Development of Disposable Cutlery Specialty Paperboard Based Primarily on Grass Pulp
Its main technical features are:
1. Based on China's raw material resources, addressing the shortcomings of grass pulp raw materials, using chemical auxiliary agents to optimize the application technology to ensure that its physical properties are close to those of wood pulp.
2. Surface treatment suitable for food packaging is applied to the paperboard to ensure that the finished paperboard is resistant to hot water, leak-proof, non-laminated, oil-resistant and heat-sealable. Economically, using virgin bleached grass pulp to produce paper tableware, and then recycling the waste tableware to produce non-food packaging paper, can fully utilize fiber resources without environmental pollution or increased pulp production load. At the same time, it can further reduce the production costs of tableware paperboard and recycled paper, alleviating the increasingly tense problem of pulp raw materials.
Seven
Development and Application of Honeycomb Sandwich Paperboard
Using honeycomb sandwich paper as the main material, LSQ wood-alternative packaging boxes have three types: I, II, and III.
LSQI type is also known as composite material packaging box. The outer layer of the box uses fiberboard or plywood with strong puncture resistance, the middle layer is honeycomb paper core, and the inner wall is bonded with grass paperboard; LSQII type is a full honeycomb paperboard packaging box, which uses honeycomb paper as the core and is bonded with outer and inner paperboard, making it ideal for high-end fragile goods; LSQIII type is a lined packaging box, using a corrugated cardboard box as the body, and the inner top, bottom and four walls are padded with honeycomb paperboard, which has strong shock absorption, pressure resistance, insulation, and puncture resistance.
Honeycomb paperboard packaging boxes have undergone destructive drop, heavy object stacking, and loaded rolling tests, and the breakage rate of fragile items is reduced by 50% to 97% compared to wooden boxes and corrugated cardboard boxes; when 600kg of heavy objects are placed on the empty box for three months, it does not deform, and no polystyrene padding is needed; the weight ratio to corrugated cardboard boxes of the same specification is 2:5, saving 60% of paperboard; the price is 28% lower than that of wooden boxes of the same specification. This new type of cardboard box will become an ideal packaging for China's export goods. Its promotion and application will play a positive role in reducing the breakage rate of goods during the circulation process and improving the quality of packaging products.
Eight
Development and Application of Pulp Molded Products
Pulp molding is a three-dimensional papermaking technology. It uses waste paper as a raw material and is molded into a certain shape of paper products on a molding machine by a special mold.
It has four major advantages:
1. The raw material is waste paper, including cardboard, corrugated board, and white edge paper;
2. The production process is completed by pulping, adsorption molding, and drying and shaping, which is harmless to the environment;
3. It can be recycled and reused;
4. The volume is smaller than foamed plastics, it can be stacked, and transportation is convenient. In addition to being used for food containers and tableware, pulp molding is more often used for industrial cushioning packaging, and it is currently developing rapidly.
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