According to the chemical properties of the waterproofing agent, there are water-based waterproofing agents and oily water-repellent agents; according to the type of stone materials suitable for stone materials, there are waterproofing agents suitable for marble, water-proofing agents suitable for granite, and waterproofing agents suitable for sandstone. According to the surface form of the waterproofing agent applied to the stone, there is a waterproofing agent suitable for the smooth surface, and a waterproofing agent suitable for the matte surface and a waterproofing agent for the matte surface.
How to choose the right waterproofing agent?
At present, there are many types of waterproofing agents sold in the Chinese market, both domestically produced and imported. These different brands of waterproofing agents vary in quality and price, and the difference is large. Some foreign brands have spent more money, but may not be able to achieve good waterproof and anti-fouling effects. Some domestic brands of waterproofing agents can not be said because it is domestically produced, its waterproof, antifouling effect is not as good as foreign waterproofing agent products. In the concept of selecting a water repellent product, users should not be foreign and light domestic. Don't mistake our country's water-repellent production and use later than abroad, and mistakenly believe that our technology in this area is not as good as abroad. In the correct choice of waterproofing agent brand, the following is my own point of view for your reference.
1, starting from the practical. As long as the domestic brand of waterproofing agent can provide the inspection report of the waterproofing effect of the appraisal and certification of the authoritative department (preferably the National Building Materials Bureau), and the inspection effect is not lower than or slightly lower than that of similar foreign products, it is best to choose the domestic brand. Domestic brands have advantages in price and are easy to purchase. When there is a dispute over product quality, they are better negotiated. The technical support and after-sales service of product providers can also keep up.
2. Consider the price. At present, the price of domestic waterproofing agents varies greatly. If the price is high and the waterproof effect is good and the high-priced waterproofing agent is selected, the cost per unit area of ​​the waterproofing agent will be too high, and the profit of the enterprise will be relatively low. Therefore, when choosing a water repellent, you should take into account the relationship between price and effect.
3. Think about the concept of environmental protection. The water repellents currently on the market are environmentally friendly and non-environmentally friendly. When selecting the waterproofing agent, it should be considered whether the selected waterproofing agent is harmful to the environment, operators and users. The environmentally friendly water repellent is environmentally friendly and does not cause side effects to the operator, let alone the health of the injured person. Non-environmental waterproofing agents have a certain pungent odor, and some even have a particularly strong pungent odor. Ingestion during use can cause lung damage, and severe cases can cause breathing difficulties. Exposure to an excessive amount of such water repellent aerosol can cause skin irritation, dry and dry skin, discomfort in the throat, difficulty breathing and dizziness. Non-environmental water repellent residual liquid can not be dumped into the sewer, otherwise it will have certain impact on the environment.
4. Choose from the surface type of stone products. The corresponding water repellent should be selected according to the type of stone surface to be treated. If it is a smooth marble, choose a waterproofing agent suitable for the smooth marble, sandstone stone is suitable for the sandstone type of waterproofing agent, matte surface stone is suitable for the matte surface type of waterproofing agent.
5. Choose from the feasibility of operation. It is advisable to occupy less space when brushing water repellent, because there is not enough space in many factories and construction sites to be used as a place for waterproofing agent treatment. The water repellent can penetrate quickly and does not require too much time to dry. The operation method is simple and fast.
6. Choose new products that are upgraded as much as possible. At present, the stone chemical industry is developing rapidly, and many new and better performance waterproofing agents are constantly being born. If the price performance ratio of the new product is more advantageous, consider choosing a new product when choosing a water repellent.
A captive bolt pistol (also variously known as a cattle gun, stunbolt gun, bolt gun, or stunner) is a device used for stunning animals prior to slaughter.
The principle behind captive bolt stunning is a forceful strike on the forehead using a bolt to induce unconsciousness. The bolt may or may not destroy part of the brain.
The bolt consists of a heavy rod made of non-rusting alloys, such as stainless steel. It is held in position inside the barrel of the stunner by means of rubber washers. The bolt is usually not visible in a stunner in good condition. The bolt is actuated by a trigger pull and is propelled forward by compressed air or by the discharge of a blank round ignited by a firing pin. After striking a shallow but forceful blow on the forehead of the animal, spring tension causes the bolt to recoil back into the barrel.
The captive bolt pistols are of three types: penetrating, non-penetrating, and free bolt. The use of penetrating captive bolts has, largely, been discontinued in commercial situations in order to minimize the risk of transmission of disease.
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