What is the difference between KAI membranes and Gore membranes?

Kai membrane technology originates from artificial blood vessel technology. For functional purposes, artificial blood vessels must possess the following characteristics: 1. An inert material that is resistant to corrosion ； 2. Not rejected by the human body, long service life ； 3. It is dense and porous, with larger pore sizes on the outer wall that allow it to grow and integrate with human tissue, while the inner wall has smaller pore sizes that prevent substances such as red blood cells from leaking out. 4. It has high strength and will not break easily, posing a risk to life. It is therefore made of expanded polytetrafluoroethylene, and a porous surface is formed through stretching. The Gore membrane is made of a composite material of PE and polytetrafluoroethylene, which tends to separate during use, leading to damage to the membrane. Nowadays, Gore has collaborated with Porel in this area, and the material has been changed to expanded polytetrafluoroethylene; however, the method used for fixing the material to the support structure differs from that used in Kay membranes

An introduction to GORE-Permatex membranes: According to GORE Corporation, the pore size of these membranes is 0.2 microns, and their thickness is 0.5 millimeters; therefore, they guarantee that the level of suspended particles is less than 0.5 ppm, with a filtration flux of more than 0.5 m3/m2·h. The sealing process of the membrane modules has been improved, with the number of screws increased from 5 to 9, in an effort to address the issue of membrane tubes coming loose. According to Ma Lixiong from GORE Company, the strength after this improvement can increase by nearly 3 times. According to PALL company staff, it has performed well in trials at Yangnong and Binhua, meeting the targets they guaranteed. According to the statements made by the staff from Binhua in their paper (see \"The Application of New Ghor Filtration Technology at Shandong Binhua\"), a comparison was conducted on the filtration flux, which showed an increase of 10–20%; there was no significant effect on the total amount of calcium and magnesium, and no comparative data were provided regarding suspended solids.

Currently, in the chlor-alkali industry, KAI Membrane and Gore Membrane are widely used for the purification of brine. We are currently using the HVM filters produced by KAI Membrane Company. We know that KAI Membrane is an improved version of Gore Membrane, but what exactly are the details of these improvements? What is the main difference between them? Those who use Gore Membrane could please share some relevant information on it, so that everyone can discuss and learn from it. Thank you all: handshake or send it to my email 601139620@QQ.COM

It seems that the sales manager at Kay Membrane Company used to work at Gore Membrane Company. There isn’t really any difference between them; the only difference might be whether the filter elements have seams or not. Kay Membrane uses seamless filter elements

That’s right; Manager Li Guoxin initially focused on promoting Gore membranes. However, as the number of users increased, more and more defects in those membranes became apparent. The timely emergence of Kai membranes allowed this agency to change its direction. So while the membranes may appear similar, their performance in chlor-alkali applications is still different. :lol :lol

The differences in the membranes are not clear, but the processes, main equipment, and their control systems are basically the same. This post was last edited by nanren2 on 2008-7-24 00:49]

The Kay membrane has the following characteristics: 1. Its pore size is 0.22–0.5 um, and it possesses a very high porosity, which enables it to achieve high filtration precision and permeate flux； 2. The filter membrane is made of expanded polytetrafluoroethylene, with no other materials blended in, offering excellent corrosion resistance ； In particular, it is capable of withstanding the corrosion caused by free chlorine and chlorates in saline water over a long period of time ； 3. The membrane has a large thickness; it features a one-piece molding structure without any composites or joints, which prevents cracking at the joints and ensures high mechanical strength ； 4. The frame of the membrane module is made of corrosion-resistant EPDM rubber, and the flexible frame significantly improves the backwashing efficiency ； 5. The diameter of the membrane filter elements is very small, which results in a large specific surface area for the filter membrane; thus, more filter membranes can be installed in a filter of the same volume to increase the filtering area. Gore membrane: It features large pore sizes, a high porosity rate, and low filtration pressure loss; solid-liquid separation can be achieved at a pressure of 0.1 Mpa. The Gore membrane, when used in bag filters, enables full-automatic control throughout the process. However, the polypropylene used as a backing layer on the membrane is susceptible to corrosion by free chlorine in saline water, resulting in a short service life. The membranes need to be replaced frequently, which makes operation inconvenient during actual production. Moreover, the membrane consumption is high, leading to elevated costs. However, the quality of the filtered brine is incomparable to that achieved by traditional methods.

What are the differences between Gore membranes and KAI membranes in filter applications? In the chlor-alkali industry, KAI membranes and Gore membranes are commonly used for the purification of brine. We are currently using HVM filters from KAI Membranes; we know that these are improved versions of Gore membranes. But what exactly are the details of these improvements, and what is the main difference between them? Could those who use Gore membranes share some information on them so that we can learn more? Thank you all: handshake or send it to my email 601139620@QQ.COM

Why isn’t anyone participating? Are there no companies that use these two types of membranes? Is it only our company? I’m sure that’s not the case; everyone, please get involved!

The membrane thickness of Kay membrane is 1 mm, while that of Gore membrane is 0.5 mm. The accessories for Kay membrane are made of titanium, whereas most of the components of Gore membrane are plastic; therefore, Gore membrane is cheaper but has a shorter lifespan； Kai membranes are slightly more expensive, but they have a longer lifespan (more than 10 applications have been in use for over 6 years without any need for replacement). Overall, Kai membranes are a better value, in my opinion, hehe

There is basically no significant difference in the quality of the filtered brine; the difference lies in the material of the membranes. The filtration membranes used by Kayi can withstand the corrosion caused by free chlorine, whereas those used by PAUL cannot. It is clear from the manufacturing process that Kayi does not require free chlorine to be removed before the brine enters the filter – in fact, free chlorine can help remove any harmful substances that may still be present in the membrane. On the other hand, PAUL requires that the free chlorine content in the crude brine be zero before it enters the membrane filter.