Product quality assurance measures

1. Product inspection

In the "Procedure Documents" of the ISO9000 quality management system, the "Procedures for Inspection of Raw Materials", "Procedures for Inspection of Intermediate Control of Products" and "Procedures for Inspection of Products" are specified in detail, and there are also "Inspection Operation Instructions" for each stage of perfection.

Inspection of raw materials: All raw materials involved shall be strictly inspected before entering the factory, and those that are unqualified shall be returned. Inspection indicators and processes shall be carried out according to the corresponding standards and inspection methods of each raw material, and shall be carried out according to the Operation Instruction for Raw Material Inspection.

Central control inspection: for each kettle of finished products, the laboratory personnel will take samples for inspection, and the inspection indexes include: homogeneity index, water reduction index, plasticity index, and each index will enter the next process after passing the inspection. Those who fail to pass the test will adjust the process parameters according to the process protocol and continue to react until they reach the standard. Detailed records of testing data, adjustment process, and monthly statistics reported. Central control inspection is carried out according to the "Central Control Inspection Operation Guideline".

Finished product inspection: Each product is inspected according to the standard batch and lot. The inspection of high performance water reducing agent of polycarboxylic acid system executes "Concrete Admixture" (GB8076) and related industry standards, and meets the methods and technical requirements of customers as stipulated in GB/T8077 "Test Method for Homogeneity of Concrete Admixture". The technical indexes of the products are required to fully meet the requirements of relevant standards and factory control values, and can enter the finished product warehouse only after clear identification. Product inspection is carried out by laboratory and test room according to "Finished Product Inspection Operation Guideline".

Factory inspection: A strict factory inspection system is stipulated for each product, and the inspection standards and methods are carried out in accordance with the items and methods stipulated in the corresponding product standards. The factory inspection is carried out by the test room and laboratory, according to the "Finished Product Inspection Operation Guideline". Qualified factory, and issued the "Product Certificate of Conformity", unqualified products according to the "Disposal Procedures for Unqualified Products" processing, clear identification, separate storage. To ensure that the product factory pass rate reaches 100%.

2. Production quality control

The product production process strictly abides by the provisions of "Product Production Operation Guideline" and "Production Process" and operates according to the steps. Focus on controlling the process parameters such as measurement, placement, time and temperature. After reaching the middle control index, the laboratory will take samples for inspection, and the laboratory personnel will inspect every kettle according to the requirements of the "Production Process Middle Control Inspection Operation Guideline". After reaching the internal control index, the product enters the next process. If the product fails to meet the internal control index, the production workshop will adjust the process parameters accordingly and continue to react until the internal control index is reached. The finished product will be sampled and inspected, and the qualified product will enter the storage tank, and the unqualified product will be disposed of according to the Disposal Process of Unqualified Product.

For each batch of products leaving the factory, after passing the sampling and inspection by the laboratory, the person in charge of quality will confirm and sign, and issue the "product factory certificate" before leaving the factory. To ensure that the product factory pass rate reaches 100%.

3 . Raw material quality control

Quality control firstly, we make sure that the raw materials enter the factory. Our company has developed a set of raw material procurement and inspection system. First of all, we will carry out long-term tracking and evaluation of the subsuppliers of raw materials, and select the subsuppliers with stable product quality and good reputation as long-term partners, so as to ensure the stable source of various raw materials. For the raw materials into the factory, according to the quality system requirements, each batch must be inspected, raw materials according to the relevant national standards for inspection, qualified into the warehouse, unqualified return.