Black masterbatch is one of the most commonly used types of masterbatch, and the color masterbatch requires the use of pigment roommates, and the pigment selected for black masterbatch must be matched with plastic raw materials and additives.
It is required that the pigment selected for black masterbatch requires that the pigment has strong solvent resistance, and can not have any reaction with the resin and various additives, including various chemical reactions, so as to avoid the change of color of the pigment and affect the use effect. For example, carbon black controls the curing reaction of polyester plastics, so they cannot be added to polyester.
As we all know, plastic products need a higher temperature for molding, so the pigment is required to have good high temperature resistance, so as to ensure that the pigment will not decompose and react due to high temperature in the process of heating and forming plastic products. In general, the heat resistance of inorganic pigments is better than that of organic pigments, so make a good choice according to your needs.
In addition, the black masterbatch is required to have higher requirements for the dispersion and tinting strength of the pigments used, and these factors will have a great adverse impact on the appearance of plastic products. It should be noted that even the same pigment product will show different effects and degrees of dispersion and tinting strength when used in different types and properties of plastic products.
There are strict processes and regulations for the use of masterbatches, which are to ensure the quality of masterbatches, and also to ensure their own quality and quality.
1. Pick up the masterbatch. While receiving raw materials according to the formula process, the production operator must fill in the number of raw material pots used in each machine in the "PP-R, PE Pipe Masterbatch Use Control Record" in the raw material warehouse according to the specific specifications of the products produced by each machine on duty, and according to the number of pots, refer to the "PE and PP-R Pipeline Masterbatch Addition Regulations" to accurately calculate the amount of masterbatch, report the total amount of masterbatch to the warehouse administrator, and make a record signature.
2. The color masterbatch is issued. According to the number of raw material pots filled in by the production operator, the warehouse keeper accurately calculates the amount of masterbatch with reference to the regulations, and carefully verifies the amount calculated by the production operator. The black masterbatch manufacturer reminds everyone that if the raw materials in the production process are insufficient and new raw materials need to be replenished, they are still strictly implemented in accordance with the above, and the raw materials and masterbatches are issued at the same time, and the raw materials or masterbatches shall not be issued separately.
3. Use of color masterbatch. Production operators must add masterbatches in strict accordance with the formula process and relevant regulations, weigh accurately, ensure the mixing time, and ensure uniform mixing. The black master manufacturer believes that it should be strictly forbidden to add indiscriminately, which will affect the product quality and process stability. When handing over the shift, the remaining raw materials must have the corresponding remaining masterbatch, and the successor host must carefully check and verify, and report in time if there is any abnormality; If there is no reflection, the successor host will be responsible for affecting the quality of the product and the stability of production.
4. The masterbatch is withdrawn. Unused raw materials and masterbatches must be returned to the warehouse in time; When returning, the production operator must accurately return the warehouse according to the number of raw materials and masterbatches, and shall not return less; The warehouse keeper strictly verifies whether the returned quantity is consistent, and shall not return raw materials or masterbatches separately. The return record of color masterbatch is still truthfully filled in the "PP-R, PE Pipe Masterbatch Use Control Record" and signed for checking.
5. Record keeping. The warehouse administrator must keep the control record of the use of the masterbatch, and the black masterbatch manufacturer reminds the production operator to fill in the truth and neatly, and there must be no omission, damage, blurring, etc.
6. Inspection. The relevant process personnel shall inspect and verify the "Control Record for the Use of Color Masterbatches for PP-R and PE Pipes" from time to time, at least once a week. Violations of the regulations that are detected shall be recorded and punished in a timely manner, and shall not be tolerated. Every quarter, the original record of "PP-R, PE Pipe Masterbatch Use Control Record" will be submitted to the factory department for inspection, and the real situation of distribution and use will be verified.
The use of masterbatch for coloring in the plastic products industry has been very common, compared with the use of pigment coloring, the use of masterbatch has many advantages and advantages, the following will introduce to you what are the advantages of using masterbatch.
1. First of all, the use of masterbatch to color plastic products can make the pigment better dispersed in the plastic, which is conducive to maintaining the chemical stability and color stability of the pigment;
2. The black masterbatch has no dust generation, which avoids the dust flying poplar during mixing, can protect the health of the operator, the operation process is simple, and the color change is easy;
3. Masterbatch can avoid pollution to the environment and utensils, and will not be stained everywhere, which is of great help to the operating environment;
4. The use of color masterbatch can save time, and can avoid the phenomenon of moisture absorption, oxidation, and agglomeration caused by direct contact with air during storage and use, which affects the use effect.