PVC profile manufacturers tell you the choice of formula
Selection and formulation of PVC materials
In the production of SG-5 resin with low degree of polymerization, hard tube should be selected
The higher the degree of polymerization, the better the physical mechanical properties and heat resistance,
However, due to the poor fluidity of the resin, it is difficult to process the resin. Therefore, SG-5 resin with viscosity of (1.7 ~ 1.8) × 10-3 Pa? S is desirable.
Lead stabilizer is generally used for hard pipe, which has good thermal stability and ternary lead is commonly used, but its own smoothness is poor,
General and smooth excellent lead and barium fertilizers.
It is very important to select and use the smoother in the processing of hard tube,
Making the melt viscosity decrease is beneficial to the molding, and considering the smoothness, preventing the fusion from adhering to the molten iron, and making the appearance of the product bright.
Smooth inside is generally used for metal soaps, while smooth exterior uses low melting point wax
It is mainly filled with calcium carbonate and barium (barite powder). The performance of calcium carbonate outer tube is good,
However, if the dosage is too high, it will affect the pipeline performance, pressure pipeline and corrosion resistance, so it is unnecessary or less to use fillers.
Source: PVC profile manufacturer www.zhongshanlida.cn
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12-17
Extrusion molding of plastic profile manufacturers
Plastic profile extrusion molding planning considerations. In the planning of extrusion molding of plastic profile, special attention should be paid to the uniformity of wall thickness, fillet and stiffener. If there is any omission, it will lead to irreparable defects. Li, chief engineer of the plastic molding Research Institute of Tsinghua University, also pointed out that the planning of plastic products is very different with different cooling and setting methods. Let's take a look at the th
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Influence of technical commonness on PVC profile manufacturers
The coextrusion of PVC profiles and multicolored surface layers is one of the most popular coloration methods for PVC profiles in China. From 2002 to now, the development trend of producing colorful profiles by CO extrusion is rapid, accounting for about 40% of the sales market of colorful profiles, and it is estimated to reach 80% in 2020. By using coextrusion technology, the milky white PVC profile can be colored, and the aging resistance, temperature resistance and impact resistance of the PV
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12-17
Coloring problems of PVC profile manufacturers
Therefore, in terms of PVC coloring, fully consider the characteristics of commonly used resins and related modifiers, and blend the characteristics of color paste. In the selection of additives, we should pay attention to the following three problems: 1. Production and processing reliability, some ingredients in additives will promote the dissolution of resin. For example, iron ion and zinc ion are metal catalysts for PVC resin dissolution. Therefore, the use of compound (red, yellow, brown and
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12-17
Analysis on the defects of PVC profile manufacturer's production process
PVC profiles are widely used and bring convenience to our life. Generally, when we choose PVC profile, we will go to the regular business to buy, this posture quality is more guaranteed. We should read the operation manual carefully before using PVC profile, so that there will be no problem in the application process, which will affect our work. Some time, due to our improper use of methods will form PVC profile can not be used normally, then what should we do? 1. Surface tarnish: causes: poor p