What are the characteristics of the method of adhesive tape bonding into boxes?
When the tape is bonded into a box, the box blank does not need to be provided with a lap tongue. After the box body is butted, it can be pasted with a high-strength reinforced tape. Adhesive equipment should be used when the batch is large. Its basic composition and working principle are similar to the automatic folding hand-over box forming machine. A tape feeding, cutting and pasting device can be installed at the point of pressure to complete the tape bonding.
How to evaluate the joint strength and quality?
The evaluation of joint strength and quality is generally measured by the compressive strength and tensile strength of the joint. The sample to be tested is cut according to the size shown in the figure. After constant temperature and humidity treatment, the test is performed on the compressor and the tensile machine, and the tear time is recorded. The maximum pressure and tension, and its corresponding deformation.
What environmental issues should be paid attention to when joining cartons?
Recently, some developed countries have banned the use of metal nails, OPP or other film tapes in order to avoid the contamination of nails and other contaminated contents and to facilitate the recycling of packaging cartons. Instead, they are replaced by hot-melt adhesives and water-emulsion type, UV-curable adhesive material.
What are the characteristics and applications of paper cups?
Paper cups are made of whiteboard paper made of bleached wood pulp, printed, coated with wax or resin (such as PE), die-cut, and coiled. They are used for the packaging of fast food, milk, ice cream, jelly, etc., and are also used as disposable hygiene drinks The use of the beverage cup has the advantages of light weight, low cost and easy disposal of waste.
What are the different water-resistant treatments required for paper cups in different uses?
Paper cups are mainly used to hold food. If the circulation period is short, apply wax treatment on the surface of the thin cardboard; when the circulation period is long, the wax dipping treatment should be used. Before the wax dipping, the moisture in the cardboard should be removed as much as possible to improve the rigidity and water resistance of the product. Because the paper cup impregnated with wax has better water resistance than wax coating, it will not affect the waterproof performance due to the cracking of the wax layer when bent.
Paper cups for hot beverages should not be treated with wax coating and dipping wax, but should be coated with high temperature resistant polyethylene resin, and special cardboard should be used if necessary. These paperboards have heat resistance, and can be heat-sealed and capped after packaging ice cream and jelly food.
What is the process of forming paper cups?
First, cut the printed water-resistant paperboard on the die-cutting device to cut the cup body and the paper bottom paper position, use the paper cup machine to apply glue to the cup body joint, and wind up on the cup-shaped mold to form the cup body; the cup bottom is turned over Slip into the bottom of the cup body after the edge, and adhere to the cup body with an adhesive. The winding mold rolls and presses the edge portion of the cup body and the bottom of the cup to form a water-tight and air-tight sealed bottom. The cup edge is turned to form an arc-shaped rim to increase the stiffness and water resistance of the cup mouth, which is beneficial to use.
In order to beautify the shape of the cup and increase the rigidity of the cup, a corrugated rib plate can also be sleeved on the outside of the paper cup, which looks like a plum-shaped structure when viewed from the top, and is used for packaging of children's food or other small industrial products; Will increase the strength of the paper cup.
What are the categories of metal cans?
Classified according to the shape of the container: â‘ round cans, high round cans, flat round cans; â‘¡ shaped cans, square cans, trapezoidal cans, oval cans, etc.
According to the method of opening when canned food is eaten: â‘ The can lid is cut open; â‘¡The can lid is easy to open the can; â‘¢The can body is rolled open.
Classified by structure and processing technology: â‘ Three-piece can; â‘¡Two-piece can.
What is a three-piece can? What is a two-piece can?
The three-piece can is composed of three parts: the can body, the can lid and the can bottom. According to the different seam process of the tank body, it can be divided into tin welding tank, seam welding tank and bonding tank.
The two-piece can is composed of two parts: the can bottom connected with the can body and the can lid. According to the processing technology, it is divided into deep-drawn cans (DRD cans) and thinned drawing cans (thin body walls become thinner).
What processes are involved in the post-press processing of the three-piece can?
The three-piece can is made of tinplate metal plate after offset printing, and then processed after printing.
Post-press processing includes varnishing, cutting, and can body connection.
Kraft Paper Container is an environmentally friendly product because it is degradable. Kraft paper is made of cellulose fibers, which can be broken down in the natural environment and do not pollute the environment. In contrast, many other types of containers, such as plastic containers, take decades or even centuries to degrade. The biodegradability of Kraft paper containers makes them a sustainable option, able to reduce the consumption of natural resources and reduce the need for landfill and incineration. In addition, kraft paper containers can also be recycled, further reducing the impact on the environment. Therefore, choosing a kraft paper container is a manifestation of environmental awareness and helps to protect our planet.
1. Takeaway restaurant: Kraft paper food containers can be used to package takeaway food, such as hamburgers, French fries, fried chicken, etc. It has good thermal insulation properties and can maintain the temperature and taste of food.
2. Cafeteria: Kraft containers can be used for food packaging in the cafeteria to facilitate customers to choose and carry food. It can carry various types of food, such as staples, salads, soups, etc.
3. Fast food restaurants: kraft paper food containers can be used for food packaging in fast food restaurants, such as hot dogs, sandwiches, fried chicken pieces, etc. It has good oil resistance and can prevent food oils from penetrating.
4. Coffee shop: kraft paper food containers can be used to package pastries, breads and other foods in coffee shops. It is breathable and can maintain the freshness and taste of food.
5. Supermarket: kraft paper food containers can be used to package foods such as cooked food and cooked meat in supermarkets. It has good environmental performance and can reduce the use of plastic packaging.
In general, kraft paper food containers are suitable for a variety of scenarios that need to package food, which can maintain the quality of food and reduce the impact on the environment.
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