Waterproof paper and waterproof cardboard production

With the development of commodity economy and the improvement of people's living standards, higher requirements have been put on the performance of commodity packaging materials. Since the 1970s, plastics have been used as substitutes for traditional waterproof wrapping papers such as waxed paper and asphalt sandwich paper. Due to its light weight, high strength, waterproofness, and good transparency properties, plastics accounted for a large part in the field of packaging materials. Share. However, the problem people discovered was that its air permeability couldn't meet the needs of both waterproof and breathable commodity packaging; what people were even more excited about was the “white pollution” caused by waste plastic packaging materials. The new public hazard is an important issue that needs to be resolved. After several trials, I explored a new process for producing waterproof paper and cardboard. According to the seven-year production practice tests of large and medium-sized enterprises producing paper-wrapped paper, kraft paper, boxboard and other packaging materials in the Northeast, it shows that this process is simple and easy to use, and the use value is greatly increased while the product cost is increased. not much. The relevant situation is introduced below:

First, production characteristics:

1. Waterproof paper products produced using this new process are used as packaging materials and can be used in place of plastic products in a wide range; and what is different from plastic products is the waste of waterproof paper products. Paper mills are not required. Special treatment can be recycled and reused as papermaking raw materials, so as not to pollute the environment and waste resources.

2. The dry and warm water-resistant and damaged paper materials do not need special equipment for copyback, so it does not need to invest in new equipment; damaged paper materials are recycled into paper pulp without adding any additives.

3. The continuous water-proof leakage time of waterproof paper or paperboard made by the system can reach: less than 72 hours for paper sheets below 80 g/m, more than 100 hours for paper sheets above 80 g/m, 300 g/paper. More than 200 meters of cardboard is not less than 200 hours, its resistance to the initial temperature of 100 °C boiling water continuous water leakage time is also a lot of dry 72 / h.

4.Compared with non-water-proof paper or paperboard of the same kind, waterproof paper or paperboard produced by this new process has no change in strength, color, and adhesive properties, and has improved printing performance. Increased performance.

5. Waterproof paper products have the same waterproof function for more than 5 years (refer to storage in the warehouse or room).

6. Production of 1 ton of water-resistant paper or paperboard with multiple consecutive water-resistant leakages of not less than 72 hours, compared with unsticted “non-water-resistant” paper or paperboard, requires an increase of 15o-ZOO dollars. The increased selling price of the products generally exceeds RMB 25O yuan, and new varieties that can increase the added value of the products are developed and are conducive to market competition.

7. The water repellent agent used has been researched and developed by the author and has been organized for mass production. The product is a colorless translucent liquid, non-toxic, corrosive and combustible, solid content above SOde, at a temperature of 5-27°C. The storage period is 3 months.

Second, the scope of application

Waterproof paper products that have been mass-produced and available for development using this process include: waterproof white paperboard for packaging frozen goods, plastic waterproofing nighttime waterproofing paper for plastics greenhouses in winter in rural areas in Northeast China, cigarette packs for cigarette factories, and bundles of books and magazines for printing plants. Packaging paper, waterproof storage paper box and waterproof paper bag for open storage, Lining board for construction gypsum board, fast food box board, water cup board, self-adhesive paper base paper, water sand paper base paper, portable paper bag paper, sea drawing, fruit hanging tree packing Paper, life and hospital waterproof paper products (such as disposable paper raincoats, paper slippers, paper insoles, paper sheets, paper tablecloths, thick, blood, liquid paper bags, garbage paper bags), etc.