How To Choose Good Quality Carton Products

In order to produce good products and make good products, we must choose good materials and machinery suppliers, and purchase high-quality indentation line, which can become a sharp weapon for you to produce perfect products.

Usually, there are many requirements for testing the strength of carton, such as appearance quality, printing quality, sealing quality, size tolerance, folding times and so on. Generally speaking, it is required to join the specification, the edge of the paper sleeve is neat, no overlap angle, the box surface is not allowed to have obvious damage or stain, and so on, and the print is clear, the color is uniform, bright and bright. The tolerance of the inner diameter and design dimension of the box should be kept in the large box of + 5mm, the small box is + 3mm, the size of the box is basically the same, there are no holes around the box, no closure and separation are allowed after the closure of each case, the printing position error is larger than 7mm, and the small box does not exceed 4mm. The carton lid is opened and folded for 180 times and folded over 5 times. The total length of the cracks in the one or two and the three class boxes is not more than 70mm. When testing, the cartons are placed between the two pressing plates and pressed to the pressure of the carton crushing. That is the pressure strength of the cartons, which is shown in KN. Carton pressure strength has always been the most important quality index of many commodity packaging requirements. Base paper is the decisive factor for determining the compression strength of cartons, as can be seen from the kellicutt formula.

However, the influence of other conditions in the production process of paper corner guards is not allowed to be ignored, such as the amount of binder, the change of corrugation height, impregnation, coating, compound processing and so on. The cartons require a certain compressive strength, because the cartons stacked at the bottom of the carton in the course of storage and transportation are subjected to the pressure of the upper carton. After packing, the compressive strength of the cartons must be suitable so as to prevent collapse. The compressive strength of the cartons is calculated by the following formula. Because of the various factors affecting the production process, the carton strength of the final carton produced by raw materials is not necessarily estimated. The result is exactly the same. Therefore, the ultimate method to determine the carton's compressive strength is to test the carton under constant temperature and humidity after being treated with carton compression testing machine. For small and medium-sized factories without test equipment, a wooden board can be covered on the carton, and then the same weight is stacked on the board to roughly determine whether the carton's compressive strength meets the requirements, and the paper is calculated according to the ring crush strength of the base paper. There are many formulas for the compression strength of the box, but the kellicutt formula is simpler and more practical. It is suitable for estimating the compressive strength of the 0201 type carton. Box type refers to the type of box and the size ratio of the same type of box, which has a significant effect on the compressive strength. Some carton boxes are made of double-layer paperboard, and the compressive strength is obviously higher than that of the same kind of single-layer box. Under the same conditions, the higher the box is, the worse the stability is, and the lower the compressive strength is.

Cartons are made of cardboard with too much moisture, or long time stored in wet environment will reduce their compressive strength. Fiber is a kind of strong water absorbency. In the rainy season and the humidity in the air is large, the moisture balance between cardboard and atmospheric environment is very important. In the process of making boxes, improper alignment, too deep slotting, and poor combination will also reduce the compressive strength of the carton. Put the carton into the six angle rotary drum with the impact plate, rotate according to the prescribed number and times, and then check the damage of the goods and cartons. Dynamic experiments are destructive. Improving the resistance to destruction of cartons and goods is cushioning pads, partitions or other protective measures when packaging goods. In addition, some cartons need to be spray and weather resistant, according to the contract agreement between the two parties. The carton packaging products are placed on the shaking table to make them vibrate horizontally or vertically, or at the same time be subjected to bidirectional vibration. After a certain period of time, check the time of the goods or the time when the cartons are damaged.

Identifying the number of indentation lines in cartons

?

Style 1: indentation groove width and height error identification

Poor quality indentation lines are mostly produced by small factories. These small factories generally do not have professional laboratories for product research and development and quality control. Therefore, the products produced are uneven, with poor accuracy and large errors. If the indentation line is 0.5X1.5mm, the width of the indentation line of the indentation line is 1.6mm1.8mm, and the measured value is completely within the range of 7.5mm. The quality of the same type of indentation line, indentation groove width of 1, 48mm~1.53mm, the error can be controlled within 2%. For example, the height of the indentation groove is low, the measured value of the indentation line height is 0.52mm~O.55mm, and the maximum error is 10%. For the same quality products, the measured value of indentation height is 0.50mm0. Between 51mm, the error is totally within 2%. It can be seen that the indentation groove error of poor indentation line is very large, and it is easy to produce a series of quality problems.

Style two: discrimination of material differences

Poor quality products in addition to poor precision, large errors, but also in many important parts of Jerry building, resulting in a decline in product quality. In order to seize the market share, the inferior indentation line production plant adopts the method of Jerry building and reducing the cost of products, so that its products can enter the market at relatively low price. For example, the width of the bottom die of indentation line is 0, the indentation line of 5x7.5mm is taken as an example. The width of the bottom die of the inferior product is only 1.82mm, while that of the high quality product is 2. 5mm. Wider width of the bottom die means greater contact area, which is advantageous to sticking the spear die to the bottom plate more firmly.

For example, the adhesive tape used for protecting the bottom mould, the width of the adhesive tape used for inferior products is even narrower than that of the bottom mold. The consequence is that some of the bottom molds have lost the protection of the protective glue before use, and the viscosity is easy to lose when used. When the die cutting machine runs at high speed, the bottom die is easy to fall out, resulting in the damage of the die cutting machine. Shutting down and machine maintenance will bring more losses. The bottom mold protection tape with high quality indentation line can completely wrap the bottom mold, so that the whole bottom mold has strong viscosity when used. The paper tube factory effectively avoids the damage of the indentation line and damages the machine, and improves the precision of the die cutting.

Style three: raw material identification

The quality indentation line is produced by better quality raw materials, and the products are more uniform. Poor quality indentation line uses poor quality raw materials, so it is difficult to improve the performance of products. For example, in order to ensure the quality of the protective tape can meet the strict requirements of the base mold protective tape, the quality indentation line production plant has not purchased from the adhesive tape production plant, because the general adhesive tape is not suitable for the indentation line production, and the error range of the adhesive tape can not meet the requirements. Therefore, the strong indentation line production plant will set up a special adhesive tape production line specially to produce tapes for indentation line. The general indentation line production plant obviously does not have the strength to invest in a professional adhesive tape production line. It often buys ordinary tape from the market for the production of indentation line, and the quality of indentation line produced by using such materials can be imagined.

?

Style four: product development and identification

High quality indentation line manufacturers pay more attention to product research and development, while inferior indentation line producers only focus on local interests. The lack of research and development has made these inferior indentation line factories lose the push to move forward. Instead of waiting for other manufacturers to develop new products, they have slightly changed their faces to plagiarize, but they often know their products but do not know what they are doing, instead, they make their products neither fish nor fowl. For the indentation line of indentation line, the indentation line of each dimension should be matched with different size of positioning rubber strip to ensure the correct alignment of indentation line. But the general indentation line production plant is not necessarily "pupil", and all the indentation lines use the same kind of positioning glue strip, so the indentation line often appears inaccurate and easy to shift.

Poor indentation line can easily reduce the quality of indentation, and it is also very easy to cause great harm to die cutting machine. If carton factories purchase these poor quality indentation lines, they seem cheap, which can reduce production costs. However, these products are of low precision, large specification error and no guarantee of quality, but on the contrary, they will easily lead to inefficient production and uneven product quality. If the delivery is not in time and the customer returns, the loss will be even greater.

?

?

?

?

?

?

?

Spot three boxes of cardboard boxes, special boxes, boxes, boxes, cartons, customized wholesale