Cement bag production standard: the newly revised "cement bag" national standard is compared with the 1996 edition standard, both in content and form, has had the big change.It is mainly shown in the following aspects:
New standard cancels seam bottom paper bag bag type, the paper bag that the regulation is used to pack cement all is paste bottom bag.
From the perspective of occupational safety and health, the new standard stipulates that in addition to 50 kg bags, other small bags can be used, and the recommended size of 25 kg cement bags is given.In addition, also stipulated plastic woven bag plastic bag and composite bag plastic woven cloth unit area quality, tensile load, peel strength and other physical performance indicators.
Combine the applicable temperature and firmness index of cement packaging bags for assessment, and specify the applicable temperature type of packaging bags according to different bag-making materials, so as to cancel the regulation of classifying packaging bags according to the number of unbroken falling of the bags.New standard cement bags suitable temperature paper is divided into two 60 ℃ and 80 ℃, fumo plastic woven bags and compound bag point 80 ℃, 90 ℃ and 100 ℃.For the test of firmness, drop test shall be carried out after heat treatment at the set applicable temperature. 5 sample bags shall be taken for test, and the number of unbroken drops of each sample bag shall be no less than 8 times.If it is less than 8 times, the applicable temperature and firmness are not qualified.
The requirements for the adaptability of the process of cement packaging bags are increased.That is to say, the whole packaging system of cement plant is in a stable state, and the cement packaging bags should meet the normal packaging requirements and the broken rate of cement bags should not exceed 3‰ after coming out of the packaging machine.make provisions for delivery inspection, type inspection items and judgment rules respectively.The new standard stipulates that if the delivery inspection items do not meet the requirements, the inspection shall be judged and approved and the re-inspection shall not be allowed.If any item other than the appearance fails to meet the requirements, it is allowed to double and take two sets of samples for inspection. If all of them meet the requirements, it is deemed as qualified by the type inspection; otherwise, it is unqualified.The effect of bag-making material on cement strength and the test method of moisture resistance are adjusted.
In summary, the revised standard of cement bags will play an important role in improving the quality of cement bags, meeting the packaging requirements of cement plants, standardizing the production of the bag making industry and promoting the technical progress of the industry.