Talking about the construction of food safety management system for tinplate production enterprises and the opening of high cleanliness tinplate...
Text / Guangzhou Pacific Tinplate Co., Ltd. Zhang Yule Luo Zhendong
Food Safety Management System Construction
On October 1, 2015, the "Food Safety Law" was formally implemented. Recently, The “General Safety Requirements for Food Contact Materials and Products†is also being brewed in Taiwan. The series of product standards have improved the health indicators of tinplate products that have direct contact with food, strengthened the regulatory requirements, and the formulation and implementation of these laws and regulations have reflected the general The urgent requirements of consumers for healthy and safe foods, and the urgent requirements for the upgrading of related industries. Correspondingly, the hidden dangers of the safety and quality of food cans, beverage cans, and milk powder cans have been changed from the hidden dangers of manufacturing such as tightness, welding, and rust. The safety and health of food contact materials. This poses new challenges for tinplate manufacturers. Tinplate manufacturers must strengthen supervision and management of food safety in order to meet stricter and stricter food safety regulations. Guangzhou Pacific Tinplate Co., Ltd. has been working hard to become the most trusted supplier of tinplate. It is a beverage can and food can. In order to provide tinplate products that meet the requirements for food safety packaging, Guangzhou Pacific Tinplate set up a food safety team at the beginning of 2015 to carry out the construction of ISO22000 food safety system. After close cooperation and hard work of all employees for one year, At the end of 2015, it successfully passed the on-site audit of food safety management system auditors, and officially obtained the food safety management system certification issued by the China Quality Certification Center in early 2016, becoming the first company in the Chinese tinplate industry to obtain food safety certification. one.
The problem of food safety means that the contents were affected by the problems of packaging materials (food The safety of the product, in turn, has resulted in personal injury or health problems for consumers. In order to ensure that from the beginning of the raw material to the packaging of the product, each link meets the requirements of safety and health, to ensure that customers use the peace of mind and satisfaction, as the professional manufacturer of food packaging materials, Guangzhou Pacific Tinplate Co., Ltd. (hereinafter referred to as Guangzhou Pacific) The safety and hygiene of tinplate products, and the strict implementation of food safety management, provide high-quality raw materials for food canning enterprises. The following is the experience sharing of the implementation points of the Guangzhou Pacific in the tinplate production process:
Hazard Analysis and Critical Control Points (HACCP) This is related to the production line The key points for the control of the relevant parts are the control points of the tinplate process for food packaging, together with the implementation of OPRP and PRP, in order to achieve customer satisfaction. HACCP contents and regulations apply to all procurement of raw materials and production processes, in order to make overall provisions for the establishment and implementation of the company's HACCP system. It serves as a mandatory regulation for the implementation of food safety system certification by the company to meet the requirements of official verification and third-party certification.
Hazard Analysis The hazards of biological, chemical, and physical factors are found in the manufacture of raw and auxiliary materials through tinplate and in the process flow. The focus is to prevent the implementation of control and analysis of three hazards such as microbes, chemical residues, and poor processing.
Formulate management and control measures, specify relevant responsibilities, implement operational responsibility, and record the entire operation link against the harms of various aspects of the tinplate production process. Through the formulation of the OPRP, not only from the environmental sanitation outside the factory area, but also from the raw materials ( The entire process of production, such as original board, tin), tin plating chemical cleaning temperature and concentration, tin-plated chemical spray water quality, electrostatic oil protection, etc. is monitored and verified to ensure that the product meets the requirements for control.
How to eliminate hazards in the production process of tinplate and how to ensure production The tinplate does not rust or perforate, which requires the current of tin plating at the critical control point (abbreviated as CCP) process, corrosion-resistant alloy generation, equipment current voltage, passivation treatment liquid temperature, steam pressure, and needles. The monitoring and verification of holes, etc. in these aspects focus on the control of corrosion resistance and surface properties from the perspective of food safety, improve the corrosion resistance of tinplates, and implement these possible food safety measures through stringent monitoring and other measures. Hazard elimination in the production process.
By searching for raw and auxiliary materials and process flow charts, The hazards of physical factors, the formulation of OPRP, the listing of CCP, the implementation of a documented system to ensure product quality and safety, Guangzhou Pacific through the effective operation of the quality management system, environmental management system, occupational health and safety management system, food safety management system and energy management The system provides tinplate products that meet the requirements of the food safety management system for the food packaging industry.
Development of tinplate for high purity milk powder tank
Tinplate has excellent barrier properties, mechanical properties and decoration Sex, perfectly matched to the requirements of milk powder storage conditions, so it is widely used in milk powder cans packaging materials. The inner surface of tinplate milk cans is not painted or directly contacted with milk powder. In recent years, the safety and hygiene standards for the packaging of milk cans have continued to increase. The milk powder manufacturers have put forward higher requirements for the food safety and cleanliness of tinplates for milk powdered cans.
With the protection of the system, Guangzhou Pacific holds in the production process. Continue to improve, step by step, in one fell swoop developed milk powder tank special high purity milk powder tank material, according to the causes of the formation of black ash to implement specific countermeasures one by one, mastered the reduction of a black ash, suppression of secondary black ash production of special technology.
Smudge is a product of tinplate wipes during tin plating After the black powder easily fall off. It was confirmed that the main components of black ash were tin oxide and tin dioxide. The black-and-grey problem seriously affects the cleanliness and appearance of the product. In addition, it will also affect the tinplate's coating adhesion. To this end, it is necessary to carry out black and gray control of tinplate, in particular the use of tinplate for milk powder cans.
Establish tinplate black-grey test and management standards
In the past, the black-gray standard on the surface of the tinplate did not have a black-grey standard that could be used for comparison judgment. It completely relied on the operator's experience. Therefore, the judgment deviation was large, and the accuracy of the judgment result was low, affecting the surface quality of the tinplate. In this regard, Guangzhou Pacific has established the tinplate black-grey test and management standard in China firstly: first, it has developed tinplate black-grey special measurement tools; secondly, it has standardized measurement methods and black-grey grades. Products with high cleanliness, such as milk powder cans, are specially controlled by black and gray, and black and gray grades are transferred to other uses.
Clear reasons, implement measures
The main components of black ash are tin oxide and tin dioxide. After investigation confirmed, There are two main sources of tin oxide and tin dioxide: one is electroplating liquid tin paste that is deposited in the plating layer; the other is that the tin layer on the surface of the steel plate after electroplating and the residue of the plating solution are subjected to high temperature oxidation. For the causes of the above black and gray, Guangzhou Pacific improved one by one by the following countermeasures.
1. Suitable plating conditions
Through tests, confirm the appropriate plating conditions (concentration of plating solution (degrees, temperature and other parameters), to enhance the quality of electrodeposition, to obtain a dense, strong tin plating layer, the anti-wiping performance of the material tin coating layer was significantly improved, and the black tin gray level has also been significantly improved.
2. Reduce plating bath tin concentration
Tin mud particles will be embedded in the plating in a co-deposition manner during the electroplating process and float to the surface of the plating after reflow, thereby forming black ash. Therefore, the black and gray level of the tinplate surface rises linearly with the increase of tin content in the bath. In this regard, Guangzhou Pacific has improved the filtration capacity of the electroplating solution filtration system, which will discharge finer particles of tin from the plating solution circulation system. At present, the concentration of tin mud in the plating solution of the Pacific Ocean in Guangzhou is stable below 1.0g/l, and the level of black ash in tinplate products has improved significantly.
3. Control of the amount of tin plating at the edge
As a general rule of thumb, the higher the thickness of the tin plating layer, the worse the level of black and gray, and the later the oxidation is more severe. Plating process due to side effects, the amount of tin plate edge significantly higher. In response, Guangzhou Pacific will change the plating end cap control system to a more stable EMG system to ensure the control accuracy of the end caps. The above measures ensure that the surface of the steel sheet is uniformly tin-plated, and the black-ash problem caused by the excessively high tin-plating amount at the edge of the steel sheet is improved.
4. Reduce the heating energy and temperature of the section after plating to reduce the oxidation of the tin layer
Most of the tin oxide in black and gray is formed by oxidation of the surface of the plating layer after plating. Lowering the heating energy and temperature of the section after electroplating can effectively improve the oxidation of the tin layer under high temperature conditions and improve the level of black and gray. The main countermeasures for this Guangzhou Pacific are as follows:
1) Increase Induction Heater (Induction Heater) The rise in reflow capacity increases the speed of the production line, shortens the time for high-temperature oxidation of the steel plate through the reflow section, and reduces oxidation of the tin layer.
2) Lower electroplating section and chemistry under the premise of guaranteeing drying effect Hot air drying temperature after blunt chemical section.
5. Reduce the amount of plating solution on the steel plate
The residual liquid of the plating solution will be further oxidized in the reflow and passivation stages. Generate tin oxide or stannous oxide. In response, Guangzhou Pacific adjusted its concentration management standards for plating baths to enhance its cleaning capabilities. In addition, hardness management is performed on the squeeze roller after electroplating to improve the wringing effect. Through the above measures to reduce the amount of plating solution on the steel plate.
6. Special management of passivation solution and passivation
In the process of cathode electrolysis passivation, passivation concentration, pH, temperature The degree of aging, the degree of aging of the solution, the amount of passivation of the cathode, and the impurity ions all have different effects on the generation of black and gray. This Guangzhou Pacific determined the appropriate low black gray passivation conditions through experiments. In addition, the passivation solution is properly renewed daily and replaced regularly to reduce the aging of the solution.
7. Improve the ability of clear water and steam cleaning after passivation
After the passivation of the steel plate, there will be residual passivation solution and tin oxide on the surface of the material. The compounds directly affect the test level of black and gray. In this regard, Guangzhou Pacific can improve the level of black and gray by increasing the pressure and flow rate of clean water after the blunt chemical section.
Through the above implementation of the special black-gray measures, Guangzhou Pacific Horse The black iron and gray level of the iron can be significantly improved, and the tin level of the high cleanliness tinplate for milk powder tanks is stable within the second grade, meeting the requirements for food safety and high cleanliness of milk powder cans at home and abroad.
Excellence, never stop, full-time participation in two-year QCC live The meticulousness of daily work and work is the “artisan spirit†that the Pacific insists.