The current situation and development trend of hea

2022-10-16
  • Detail

The current situation and development trend of heavy bag packaging machinery in China

with the sustained and healthy development of China's economy, the demand for heavy bags in all walks of life is increasing, the varieties are constantly improved and updated, and the requirements for packaging machinery are also higher and higher. Facing challenges, grasping opportunities, and constantly studying new trends are important topics for the development of China's packaging industry

China's packaging machinery industry was formed in the late 1970s and early 1980s, and entered a period of rapid development in the 1990s. At present, the whole industry has entered a period of product structure adjustment and improvement of innovation ability. The establishment and development of heavy bag packaging machinery in China are also developing with the improvement of cement bags and other large capacity packaging bags. In terms of cement packaging, with the use of iron barrels, wooden boxes, straw bags, gunny bags and later multi-layer seam paper bags, the development of bagged cement based on new materials and new bag types has gone through a long process with twists and turns. At present, the development of packaging machinery around the world has shown a momentum of integrating machinery, electricity, gas, liquid, light, magnetism and biology. The high efficiency of production, the recyclability of energy-saving products, the practicality and intelligence of high-tech have become the development trend of packaging machinery all over the world, which should also be the mainstream development direction of China's packaging machinery industry. In terms of product structure adjustment, we should change the current situation of low technology content, learn from foreign advanced technology, develop and produce large complete sets of equipment and high-tech products with high efficiency and low consumption, which are suitable for production and marketing, develop suitable packaging equipment according to national conditions, accelerate the upgrading of packaging machinery, and further explore the domestic and international market

this paper mainly presents some superficial views on the current situation and new development trends of heavy packaging bags and bag making equipment, with a view to attracting jade

(I) the current situation and new development trend of plastic woven bags and plastic knitting machinery

in the late 1970s, China introduced plastic woven bags with the import of some products, and then introduced knitting equipment. Plastic woven packaging has been rapidly applied in many fields, especially for high-capacity transportation packaging, because of its strong and durable, low cost, simple manufacturing process and other advantages. The use of plastic woven bags for cement packaging began in 1982. Hundreds of plastic knitting production lines were introduced from different countries, including a dozen complete sets of equipment with a relatively complete level. Since the mid-1980s, China's Zhejiang, Jiangsu and other places have successively developed domestic equipment and put it on the market in large quantities, making a great contribution to the development of China's plastic knitting packaging industry

plastic woven packaging has developed rapidly. By 1995, the number of plastic woven bags used for cement packaging had reached 5.6 billion, accounting for two-thirds of the total cement packaging in that year. The implementation of GB "cement packaging bag" has also injected a stimulant into the development of plastic knitting enterprises and plastic knitting equipment manufacturing industry, and plastic knitting plants and plastic knitting equipment manufacturing plants of various grades have sprung up. However, from the perspective of the overall enterprise structure and scale of the plastic knitting industry, there is a phenomenon of "scattered and small". Most enterprises have only one production line. Due to their small scale and insufficient production capacity, it is difficult to integrate with international standards, form serial woven products, and make technological innovation. In recent years, many entrepreneurs have seen this and formed plastic knitting groups. In some regions, loose collaborative organizations with the "plastic knitting city" model have emerged. After years of "survival of the fittest", some enterprises with certain advantages, proper operation and effective innovation have stood on their feet and achieved development, and many weak people have also quit the industry

the production of plastic woven container bags in China began in the 1980s, about 20 years later than that in developed countries. At present, it is in a period of rapid development, but in terms of the technical content of products, it is still in a backward state in the world. Facing the structure and requirements of foreign orders from raw materials to formula design samples, due to the lack of technology and equipment, we can only sigh. In terms of scale, there are few enterprises with independent product research and development capabilities that have formed a large-scale container bag enterprise. They can only produce low-grade products with low added value, with rough workmanship and simple performance. For the production of high-grade container bags, such as food, chemical and aquatic products bags, container bags and pallet bags with many functions, such as waterproof, breathable, mildew proof, sun proof, safe and fire-proof, in line with the environment, there is no advanced special equipment and testing equipment in China

after more than ten years of development, China's plastic knitting machinery manufacturing industry, from the overall level, high-level products are basically developed on the basis of digesting and absorbing the technology of similar foreign products, and the history of imported equipment has basically ended. In addition, China's plastic knitting machinery products have gone abroad. In the markets of the Middle East, Southeast Asia, Russia and even the United States, where the new regulations do not provide absolute error requirements for deformation indicators, Occupy a certain share with the advantage of performance price ratio. But we should also be sober to see that there is still a gap with foreign products. A considerable number of plastic knitting machines have the problems of low grade, low automation and poor reliability, which urgently need to be upgraded

at present, there are some new trends in the development of plastic knitting equipment:

1. The drawing machine, laminating machine and other units adopt microprocessor centralized control, process parameter setting and display digitization, perfect temperature control system, etc

2. Internal coating technology

3. Circular loom: improve the manufacturing accuracy, reduce the rolling of shuttle wheel flat wire, reduce the driving power of shuttle, improve the speed, reduce the broken end rate and improve the sensitivity of the automatic stop device after weft breaking

4. The printing press is developing towards double-sided and multicolor

5. Specialization of parts production

6. The development of special equipment is a top priority for container bags

(II) the current situation and new development trend of paper bags, composite bags and bag making equipment

seam multi-layer paper bags are traditional bag types with heavy packaging, which are still used in some cement, chemical raw materials, grain feed and other industries. Their bag making equipment basically uses the high-level roll former barrel beater in the early years, and then sews with a sewing machine. Seam paper bags with valve ports have valve ports at one corner. This bag type has also been used for many years, It is in the trend of being phased out, and the equipment has also aged and needs to be updated

paste bottom bag is an internationally popular preferred bag type. It has ten characteristics, such as high firmness, low cost, improving loading speed, easy to realize bag inserting automation, good environmental protection performance, improving bag making production efficiency, improving stacking stability, making full use of warehouse transportation capacity, strong self-reliance, easy identification and so on. It has become a leader in heavy packaging bags. Since the 1980s, industrial developed countries have basically completed the transition from sewn bottom bags to pasted bottom bags. Since 1989, Tieling cement paper bag factory and other enterprises have successively introduced the pasted bottom paper bag production line with the world's advanced level in the 1980s from Germany. The introduction of these equipment has ended the history of manual bag pasting in China, and effectively proved the progressiveness of bottom bag pasting. The industry association called for the development direction of "changing the seam to paste" of packaging bags, which promoted the process of changing the seam to paste, and achieved certain results. The development of special equipment has made progress

paste bottom packaging bags are used to contain powder, grains, flakes, flocs, thick materials, such as cement, grain, seeds, starch, feed, chemical fertilizer, chemical raw materials, mineral powder, tea, medicinal materials, etc. in recent years, the packaging improvement is also used to contain thick materials such as asphalt, paraffin, paint, coating, etc., which can partially replace steel barrel packaging

at present, the development of multi-layer paper bag pasting equipment is mostly based on the digestion and absorption of foreign technology, and its basic principle is as follows:

the packaging paper is on the drum beating machine, through virtual cutting, vertical and horizontal two-way dot gluing, pricking, forming, breaking, and out of the bag. Become a semi-finished bag barrel; Then, feed, open the bottom, install and paste the valve port, fold and form, turn the bottom, and compact on the bottom pasting machine, and then output the bag. Domestic imitation equipment has been produced in Jilin, Henan, Guangdong and Shandong, which is close to the level of foreign countries in the 1980s. Basically meet the requirements of domestic production of multi-layer paper bags

laminated plastic woven paste bottom bags are ideal packaging for chemical raw materials, fertilizers and other materials. At present, most of the bags used in China are sewn bottom bags. Due to the high price of imported paste bag equipment, domestic enterprises can't afford it, which hinders the process of packaging export products in line with international standards. The first domestic multifunctional plastic bag life complete set of equipment independently developed by China has been successfully trial produced in Qingdao recently. The successful trial production of this product marks that similar products in China will no longer rely on imports

the new composite paper bag material reinforced paper fills the gap at home and abroad, but it brings new topics to the bag pasting unit. The function setting of the existing multi-layer paper bag pasting equipment can no longer adapt to it. Applicable domestic equipment has been produced

the emerging transportation packaging paper-based high-capacity liquid material packaging bag (hereinafter referred to as liquid packaging bag) is a major reform of the traditional iron bucket and plastic bucket packaging. The liquid packaging bag is mainly used to fill asphalt, paraffin, rosin and other materials that are liquid at high temperature and solid at normal temperature, as well as thick materials such as paint and coating. It has the advantages of low cost, high strength, high temperature resistance, moisture resistance and can prevent the packaged materials. Jinan new era Gold Testing Instrument Co., Ltd. tells you the adjustment method: aging surface, many stacking layers (higher than 20 layers) and neat It is convenient for transportation (especially railway and sea transportation) and loading and unloading, saves storage and transportation volume, is convenient for filling and does not stick to bags when unpacking, can realize civilized production, and the discarded old bags are free of harmful substances and easy to recycle

it is said that liquid packaging bags have the outstanding advantages of "three proofs" (moisture-proof, anti-corrosion and anti-seepage) "three resistances" (strong pressure resistance, impact resistance and anti-aging), and overcome many disadvantages of packaging in iron drums and plastic drums. Many materials originally packaged in iron drums and plastic drums can be directly converted to liquid packaging bags. They have been promoted and continuously expanded in developed countries, and have just risen in China, Professional equipment suitable for national conditions has been developed

to sum up, the development trend of paper bags, composite bags and their special equipment has the following characteristics:

1. Bag pasting equipment should develop towards multi-function

2. The development of bag pasting equipment should be carried out simultaneously with high-grade equipment and popular equipment suitable for small and medium-sized enterprises

3. The development direction of laminating plastic woven bag pasting equipment is to adopt heat sealing process instead of adhesive method

4. Reduce costs and be cheap and good

5. Develop special functional barrel making equipment

6. Continue to improve the performance of the special bag making equipment for liquid packaging bags to make it more compatible and meet the huge market demand

Copyright © 2011 JIN SHI