Improve the quality management system of adhesives to ensure the quality of steel slabs. The specific measures taken by Changchun Shaanxi Textile Equipment Research Institute and Shaanxi Xianyang 712000 are theoretically demonstrated and after repeated trials, the splitting strength should be used as an indicator to evaluate the performance of adhesives. The 0 刖 æ— æ— æ— ç»‡ 织 织 胶粘剂 胶粘剂 胶粘剂 胶粘剂 胶粘剂 胶粘剂 胶粘剂 胶粘剂 胶粘剂 æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— æ— The performance of the adhesive directly affects the bond fastness of the steel raft. In recent years, the speed of shuttleless looms at home and abroad has generally increased. The requirements for Fugang are also getting higher and higher. To this end, in the development of new adhesive products, it is necessary to strengthen the quality of the burial, in order to ensure the quality of the adhesive and thus improve the bonding fastness of the steel shovel, in order to meet the high speed of the shuttleless looms.
The adhesive is the development of the Shaanxi Textile Equipment Research Institute in the early 1990s. Due to the small scope of application of this product, in recent years, we have developed our new technological advantages in the market competition, such as the type, the type and the like. Develop quality and service activities compared with peers, so that the products are easy for users to use. Especially on the eve of the current WTO accession, we have continuously improved the quality management system so that China's textile trade can grow steadily after joining the WTO.
1 Coordinating the production and sales channels The storage period of the adhesive is one year, and the bonding strength will decrease slightly with the storage time. The main raw materials used also have a shelf life of five. Therefore, reducing raw material reserves and finished product inventory is not only the need of operation, but also the need to ensure product quality and quality. We always insist on the fixed production by sales. For large users who purchase more than ton of secondary goods, we will start production according to the order, and at the same time dredge long-distance transportation channels to deliver goods to the door.
In the absence of special circumstances, the user receives products that we produce within half a month. The finished product management is refined, the finished products are placed according to the production date, and the early production is shipped first; the products with a small inventory of more than half a year are returned to the production department. Not sent to the user. In this way, even manufacturers with less purchases will receive adequate quality assurance.
2 Strictly set the raw material to seal the finished product of the finished product. There are more than ten kinds of raw materials. All raw materials are supplied at a fixed point without exception, and the suppliers of the goods are all good quality, over the unit, and adhere to the principle of quality first in terms of procurement and materials. After the purchase of raw materials, there will be a special person to test, and the unqualified raw materials will be returned.
3 production process management adhesive is a low molecular polyamide cured epoxy resin adhesive system, composed of high viscosity main agent human curing agent 8. After purchasing the adhesive, the steel shovel manufacturer can only visually check the color and depth of the liquid, whether it has visual or granule bubbles, and simply bond it with the truss girder and the cymbal. It is qualitatively evaluated whether the bonding is firm and the curing time is short. Non-destructive testing of bond strength is basically a blank. Some manufacturers have the problem of the bonding quality of steel shovel, even when it is woven on the machine. We have established a stable and scientific and feasible production process, which is ensured by strict control of the art and the aspiration of the production personnel. The quality of the adhesive is stable. 3.1 The fluctuation of the performance of the domestic chemical raw materials is too large. For example, the key indicator of the low-molecular-weight polyamide, the key component of the 8-agent main component, is the same as the factory-standard indicator. The 650 type is 200±2051, which is the maximum value of 400±20 amine value. 40. According to the data introduction and our tests, the difference between the curing time and the bonding strength is obvious when the low molecular polyamide amine value is different. To this end, we tested the low molecular weight polyamide amine value, and the raw material of different amine values ​​was determined by the type and type of adhesive value. At the time of feeding, the deviation of the fluctuation of the amine value is controlled by the juice calculation to ensure the long-term stability of the internal quality of the adhesive.
3.2 The solid material in the adhesive has a uniform particle size of more than 2, and the target powder is easy to aggregate and absorb moisture during transportation. Therefore, sieve powder is used. Feeding Process 3.3 The weighing operation in the production of adhesives is very simple in itself, but it is difficult to find that it is difficult to remedy if it is said to be in error, and efforts must be made to achieve zero errors. For this purpose, a full-time record worker is set up in the weighing process, which is responsible for metering and recording, and is weighed by the weighing method of the balance room. Calculate the actual total feed amount for each batch of products, and compare it with the total output. Check 3.4. In the production process, the process parameters such as the feed sequence speed and temperature mixed vehicle speed time should be clearly defined and detailed production records, various groups. After the mixture is fully mixed and evenly filtered, the finished product is tested and the adhesive is put into production. We have repeatedly explored the inspection of finished products. It is considered that a quality inspection system should be established, and the appearance quality should be visually observed. 2 The heating speed is measured and the curing speed is 3.
In the early stage of the adhesive, hair. We refer to the textile industry standard of the People's Republic of China for the test of the fastness of the steel ç˜ 940 940 940 129 129. In the development of adhesive enterprise standards to the technical requirements of 59301, the tensile strength of steel reinforced concrete shall be not less than 6 coffee per length; the sample shall be taken from the steel shovel according to the provisions of Appendix 94012, taking two long 50,1 Samples; obviously this must be on the finished product, the destructive test of niobium. Since we only produce adhesives and test the performance of the adhesives, we must sell semi-finished niobium and aluminum niobium beams to the steel crucible manufacturer. We also make self-adhesive glue to make small flaws. In the implementation, we feel that the sample is taken + convenient, the system is cumbersome and the cycle is long. The main method is to evaluate the performance of the steel shovel as a standard for testing the performance of the adhesive. science. The bond strength is usually used as an index for evaluating the performance of the adhesive, and the bond strength station is under the action of an external force. Causes the damage of the bonded joint, the highest fire load per unit bonding area or bonding degree, the inner wall of the truss of the shuttleless looms and the cymbals inserted in the truss. The metal wire is fully bonded into a whole body and the surface in contact with the adhesive is bonded. From this point of view, the thickness of the caries. Caries width ç˜ ç˜ ç˜ ç˜ ç˜ ç˜ å®½åº¦ 宽度 宽度 宽度 宽度 宽度 ç˜ ç˜ ç˜ ç˜ ç˜ ç˜ ç˜ ç˜ ç˜ ç˜in other words. A shuttleless loom steel box is produced by using an adhesive of adhesive strength.
When any of the above items is changed, the bonding area changes, and the bonding fastness of the measured flaw changes.
The adhesive is an epoxy adhesive. At present, for epoxy resin adhesives, most of the information and product specifications describe the use of shear strength and tensile strength. The shear strength and tensile strength are related properties, and the load is evenly distributed throughout the bonding area. The simple shear test load acts in parallel on the bonding surface, and the simple tensile test load is perpendicular to the bonding surface and passes through the bonding surface. The center; to the force of the corpse steel on the loom, still needs to be further explored, the preliminary analysis feels that the shear and stretch seem to be more different from the steel stern stress; and the splitting strength test is the line force. In the test, a tensile force perpendicular to the bonding surface is applied to the edge of the bonding surface of the sample, and the measured data is the maximum load that the sample can withstand when it is separated. The force of the forceps blade teeth of the alum test specimen in which the maximum load is divided by the sample adhesive is relatively close. In addition, the peel strength of the epoxy resin adhesive is relatively low. The splitting test and the peeling test are similar to the sample. The cracking strength is used as a measure to evaluate the strength of the glue. Therefore, we determined that the splitting strength is used as the main indicator of the internal evaluation 1 illusion adhesive energy, according to 0877498 Ding into playing 1 martial arts. Since there are not many test units in the company, we have measured the splitting strength of imported adhesives in Japan after long-term tests. I have determined that I have produced 12; 2 people who entered the old 8 such as a variety, 0 internal resistance index of adhesive splitting strength.
In the weaving process, the steel shovel is repeatedly subjected to a variety of forces, and the splitting strength is only destroyed by the force sample at the moment of the specific conditions of the laboratory. The data 3 can quantitatively reflect the bonding performance of the adhesive under the test conditions. Efforts must be made to establish a variety of methods to test the performance of adhesives in order to fully reflect the performance of adhesives.
5 Finished product packaging In the past, the inner packaging of LKJ adhesive used 5kg capacity of tinplate, and the outer packaging used nail box. In recent years, the user's intention was adopted. The inner packaging was changed to a 4-capacity plastic drum, and the outer packaging was changed to a cardboard box.
And on the product label, the storage conditions and instructions for the use of the adhesive are recommended for easy use.
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