The most common problem with the purchase of 6 micron aluminum foil is the deviation of thickness and lack of uniformity. Because aluminum foil rolling is very sensitive to parameters such as temperature, oil film, and tension, the thickness is divided by minute fluctuations, and the 3% difference in thickness is difficult to control with the production of ultra-thin aluminum foil. Some suppliers may encounter partial thick or thin situations to keep costs down. Thin place is easy to be broken, thick place can not adapt to the scene of precision packaging, electronic shield, etc.
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Regarding this issue, we need to clarify the standard of tolerance of thickness before purchase. Require supplier to provide third party's inspection report. Clarify the deviation of thickness is within ±0.3 micron. In the purchase of products, we preferentially select suppliers who have advanced four-roll reverse rolling mill and can control the rolling process stably. At the same time, we promise the standard of picking thickness in the contract. Sample at random after admission. In addition, we can request a small quantity of samples from the supplier for test production and bulk purchase after verifying the uniformity of thickness.
Next, the spate of surface quality defects is also a prominent problem in the purchase. 6 micron foil surface of the pin hole, Laura table, oils, and defects such as wrinkles, when the pin hole is the most common progress - - white impurities, rollers, flexible thin aluminum by impurities etc. Occurs almost completely blood well hall park, Numbers, and cannot be forced to resize. Too much pinhole will affect the blocker, so that the lora coating, oil dirt complex, printing process is not normal. Wrinkles will reduce the horizontal degree of the product, affecting the use effect.
The solution must be controlled from the beginning. Require supplier to provide surface quality inspection report when purchasing. The number of pinhole is controlled below 100 /m. No roller marks, oil stains and wrinkles. At the same time, in the contract is clearly the provisions of the standard and claim for surface defect judgment; After entering, we conduct a pre-inspection to focus on the flatness and cleanliness of the surface, and if there is a defect, we will immediately contact the supplier for a return exchange. In addition, process suppliers such as aluminum fluid purification and rolled oil filtration are selected to reduce the occurrence of surface defects from the production stage.
Also, there is a problem that the material and the application scene do not match. 6 micrometer commercial alloy aluminum foil is 10, more than 30 series, different alloy of attraction in terms of strength, flexibility, different, adjust my 온성 greater difference of scene - - such as food packaging, fda and iso22000 food grade material should pass the authentication and electronic 기방, should guarantee the effect of specific alloy, high-temperature 씬 comes my material. Because some suppliers did not know the characteristics of the alloy and delivered it blindly, it failed to meet the demand for use.
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About this, clarify their own application scene before purchase, get professional opinions from suppliers and select suitable alloy materials. Food packaging shall ensure that the products are in accordance with GB 4806.9-2016 standard, and exceed the standard to provide food level certification report and avoid heavy metal transfer. The kind of electronic shielding should pay attention to the efficacy of the former, and obtains what accord with the standard of relevant industry. · Provide material inspection report to suppliers and require them to clarify alloy components and performance parameters to avoid loss due to material mismatch.
Cost control and supply stability are also important challenges in procurement. The production process of 6 micrometers aluminum foil is complicated, costly and some buyers pursue excessively low price, which is a misunderstanding of low quality that is easy to fall into. In addition, some small suppliers have insufficient production capacity, unstable supply chains, and are prone to postponement of supply and mass shortages, which affect the progress of production.
To solve this problem, we need to balance cost and quality. Avoid simply pursuing low price and select regular suppliers with high bang for the buck and stable production capacity in the first place. · Clarify the terms of lead time and delay of lead time during the contract, so as to ensure reasonable lead time in advance and avoid the impact on production caused by delay of lead time. In addition, it will compress the number of good suppliers to 2~3 candidates in case of sudden shortages.
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We should focus on the purchase of aluminum foil with a thickness of 6 micrometers. The thickness uniformity, the quality of the surface, the adaptability of materials, the cost and the stability of supply are four important issues. Buyer to clarify in advance demand, strict screening and improve its terms and conditions, the provider, must strengthen the inspection, the shuttle can effectively avoid purchasing risk and superior products to meet the demand, then can buy can provide guarantee for the production of.
