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How to identify the quality of water stop strips that swell with water
When it comes to water swelling water stop, everyone should be familiar with it. We all know that there are two types of water swelling water stop bars, one is product type and the other is putty type, so what are the differences between the two water stop bars? , How to distinguish the quality of good or bad. Let's find out with the editor of Hebei Tushun!
Let ’s talk about the difference between the product type and the putty type first. Let ’s look at the specifications that can be customized. Then look at the color. The red water stop is mostly the product type, and the black or gray-black is mostly the putty type. . This is a convenient way to distinguish the product type from the putty type water stop bar from the appearance!
Now let's talk about how to distinguish the quality of the water-swelling water stop bar next time. Probably judged from the following.
1. Look at the material first. Here is not to look at the material list and test report, but to see the material of the product.
The water stop strip is divided into product type and putty type in process and material. Generally speaking, the product type is red, which is made of raw materials after the process of opening and mixing. Once the product is finished, the shape cannot be changed and the feel It is harder and implements the standard of intumescent rubber. It has high standard requirements and many projects. It has higher indicators in hardness and pressure, etc. The product price is higher and it is mostly used in projects with special design requirements.
Putty type water-swellable water-stop bar is a common black water-stop bar. It is directly extruded after mixing. It is a commonly used product in most architectural designs and implements three national standards.
2. Visual inspection
After getting the sample, first of all, visual inspection, appearance, specifications, etc. Take the putty-type water-swellable water-stop bar product produced by our Tushun Rubber Products Co., Ltd. as an example. The commonly used specification is 20mm * 30mm, which refers to the cross-sectional specification. The length is generally 5 meters in a plate, with a separator paper packaging in the middle. Good quality water stop strips are square in appearance and full in shape. The thickness of a water stop strip is uniform before and after, and the length is continuous and there is no break point in the middle. However, if the water stop strip is squeezed and deformed in some parts due to transportation, it is normal.
3. Feel
The putty type water-swellable water stop is a rubber product with rubber characteristics. It feels rich and has certain toughness in the hand. How to judge it? The following methods can be used for simple test:
Putty type water-swellable water-stop bar should be held in the hand, and it should have a certain degree of flexibility. It can be bent at any time, and there may be a few cracks after bending, but it should not be broken. After stretching, there can also be a few cracks, but it should not break. It should be noted that this is a simple detection method, please do not pull the water stop bar forcibly in the specific construction.
In fact, the early putty type water-swellable water-stop strips are required for self-viscosity, and the joints can be directly pressed and pressed firmly. Since the national standard does not require it, we are now only customized for customers with special requirements.
4. Soak
Many people think of the putty type water-swellable water stop bar. Will it swell with water? Of course, yes, swelling water, stopping water with water is the working principle of the water stop. The water swelling of the water stop bar is a physical change. After absorbing water, the water is stored to increase the volume.
5. Acceptance
Acceptance is also a very important part. First look at whether the bulk goods are consistent with the samples and whether the specifications are within a reasonable range, and then you can randomly check the length of a box. This is very important, because the price of the product depends not only on the unit price but also on the actual unit price, that is, whether the product supplied Sufficient amount, otherwise it is possible to buy cheap and expensive.
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13313081215 Manager Wang 