PH值过高对人体的影响

The impact of high pH on the human body

人的皮肤表面分泌出的汗液和皮脂的混合物经检验测定：东方人皮肤的PH值一般为4.5～6.5，这是人体皮肤分泌的尿素、尿酸、盐分、乳酸、脂肪酸、游离脂肪酸、中性脂肪等混合物的PH值。由于在人体表面存留着这么多的酸性物质，使皮肤的平均PH值为5.75，呈弱酸性。它能抑制体表细菌的寄生，这种杀菌能力被称为皮肤的自我净化。皮肤呈碱性拾，不但细菌易繁殖，而且对刺激性物质的抵抗力也下降。

The mixture of sweat and sebum secreted on the surface of human skin has been tested and determined: the pH value of Oriental skin is generally 4.5-6.5, which is the pH value of the mixture of urea, uric acid, salt, lactic acid, fatty acids, free fatty acids, neutral fats and other substances secreted by human skin. Due to the presence of so many acidic substances on the surface of the human body, the average pH value of the skin is 5.75, which is weakly acidic. It can inhibit the parasitism of surface bacteria, and this bactericidal ability is known as the self purification of the skin. The skin is alkaline, which not only makes it easy for bacteria to reproduce, but also reduces its resistance to irritating substances.

碱性比较强的洗涤剂残留于布草，一般脱脂力比较强，与皮肤的酸性物质会发生中和反应。这种反应会引起皮肤干燥、产生刺激性、引起人体过敏和某些皮肤病，对皮肤造成损害。我们的皮肤是弱酸性的，这种弱酸性是为了保护我们的肌肤抵御外来的细菌对皮肤的侵害。如果我们接触和使用了PH值偏高的布草，那么就破坏了我们皮肤原有的自我保护作用，直接影响到我们的人身健康和安全。

Detergents with strong alkalinity remain in linen and generally have strong degreasing power, which can neutralize acidic substances in the skin. This reaction can cause skin dryness, irritation, allergies, and certain skin diseases, causing damage to the skin. Our skin is weakly acidic, which is designed to protect our skin from the invasion of foreign bacteria. If we come into contact with and use cloth with a high pH value, it disrupts the original self-protection function of our skin, directly affecting our personal health and safety.

2、PH值过高对布草的影响

2. The impact of high pH value on linen

碱性洗涤剂在布草上的残留影响。虽然碱性洗涤剂在洗涤过程中对棉纤维是安全的，不会损伤布草的纤维，但碱性洗涤剂残留在纤维之内，烘干或烫平后，会使布草发灰变硬，板结。

The residual effect of alkaline detergent on linen. Although alkaline detergents are safe for cotton fibers during the washing process and do not damage the fibers of the linen, alkaline detergents remain within the fibers and can cause the linen to turn gray, hard, and harden after drying or ironing.、

洗涤的水质影响。据调查目前大部分洗涤部(公司)仍采用地表水、地下水、自来水等硬水洗涤，采用软水洗涤很少。硬水用于过水清洗，硬水中的钙镁等金属离子在PH值较高时容易生成不溶性盐类在布草上沉积，使白色布草产生发灰现象，影响白度和手感，使颜色布草的色彩变暗，失去光泽。钙镁等金属离子在布草上沉积，于纤维的粘附是相当牢固的，要把布草上粘附的钙镁等金属离子洗除，使发灰的白色布草变白，在目前的情况来讲，解决这个问题对布草没有损失时相当困难的。

The impact of washing on water quality. According to the survey, most washing departments (companies) still use hard water such as surface water, groundwater, and tap water for washing, and rarely use soft water for washing. Hard water is used for washing with water. Metal ions such as calcium and magnesium in hard water are prone to form insoluble salts when the pH value is high, which can deposit on the fabric, causing the white fabric to turn gray, affecting its whiteness and texture, making the color of the fabric darker and lose its luster. Metal ions such as calcium and magnesium deposit on the fabric, and their adhesion to the fibers is quite strong. It is necessary to wash away the metal ions such as calcium and magnesium adhering to the fabric, making the gray white fabric turn white. In the current situation, solving this problem is quite difficult when there is no loss of fabric.

铁等显色金属在水中并不以金属形态存在，而是以离子或离子化合物形式存在，如果这些水在采用碱性洗涤剂加热洗涤布草或采用氧化剂漂洗时，由于PH值较高会形成显色金属化合物。如铁锈(氢氧化铁)沉积在布草上成为一些棕色的斑点，也会使白色布草整体变黄，使眼色布草色彩变淡、变暗。

Iron and other color developing metals do not exist in the form of metals in water, but in the form of ions or ionic compounds. If these waters are heated with alkaline detergents to wash linen or rinsed with oxidants, they will form color developing metal compounds due to their high pH value. If rust (iron hydroxide) deposits on the cloth and becomes some brown spots, it can also make the white cloth turn yellow as a whole, making the color of the cloth lighter and darker.

对毛巾类柔软效果的影响。柔软剂一般采用阳离子表面活性剂。使用时应避免使用质量太差的水(如折合CaCO3计硬度大于100ppm以上的水)，尽量洗净残留在布草上的残余碱(PH值高)和洗涤剂的阴离子活性物以免影响柔软质量。过水不清、水质太差、碱性洗涤剂和阴离子活性物残留于毛巾纤维之内，很大程度上会抑制和抵消柔软剂的作用，毛巾烘干后，会使毛巾发灰变硬，柔软效果不佳。

The impact on the softness effect of towels. Softeners generally use cationic surfactants. When using, it is necessary to avoid using water with poor quality (such as water with a CaCO3 hardness greater than 100ppm), and try to clean the residual alkali (high pH value) and anionic active substances of the detergent on the cloth as much as possible to avoid affecting the softness quality. Unclear water flow, poor water quality, residual alkaline detergents and anionic active substances in towel fibers can greatly inhibit and counteract the effect of softeners. After drying the towel, it will make it gray and hard, resulting in poor softening effect.

用于过水清洗，硬水中的钙镁等金属离子在PH值较高时容易生成不溶性盐类在布草上沉积，使白色布草产生发灰现象，影响白度和手感，使颜色布草的色彩变暗，失去光泽。钙镁等金属离子在布草上沉积，于纤维的粘附是相当牢固的，要把布草上粘附的钙镁等金属离子洗除，使发灰的白色布草变白，在目前的情况来讲，解决这个问题对布草没有损失时相当困难的。

Used for water cleaning, metal ions such as calcium and magnesium in hard water are prone to form insoluble salts when the pH value is high, which can deposit on the linen, causing the white linen to turn gray, affecting whiteness and texture, making the color of the linen darker and lose its luster. Metal ions such as calcium and magnesium deposit on the fabric, and their adhesion to the fibers is quite strong. It is necessary to wash away the metal ions such as calcium and magnesium adhering to the fabric, making the gray white fabric turn white. In the current situation, solving this problem is quite difficult when there is no loss of fabric.

铁等显色金属在水中并不以金属形态存在，而是以离子或离子化合物形式存在，如果这些水在采用碱性洗涤剂加热洗涤布草或采用氧化剂漂洗时，由于PH值较高会形成显色金属化合物。如铁锈(氢氧化铁)沉积在布草上成为一些棕色的斑点，也会使白色布草整体变黄，使眼色布草色彩变淡、变暗。

Iron and other color developing metals do not exist in the form of metals in water, but in the form of ions or ionic compounds. If these waters are heated with alkaline detergents to wash linen or rinsed with oxidants, they will form color developing metal compounds due to their high pH value. If rust (iron hydroxide) deposits on the cloth and becomes some brown spots, it can also make the white cloth turn yellow as a whole, making the color of the cloth lighter and darker.

对毛巾类柔软效果的影响。柔软剂一般采用阳离子表面活性剂。使用时应避免使用质量太差的水(如折合CaCO3计硬度大于100ppm以上的水)，尽量洗净残留在布草上的残余碱(PH值高)和洗涤剂的阴离子活性物以免影响柔软质量。过水不清、水质太差、碱性洗涤剂和阴离子活性物残留于毛巾纤维之内，很大程度上会抑制和抵消柔软剂的作用，毛巾烘干后，会使毛巾发灰变硬，柔软效果不佳。但铁离子的水平却只能有0.2ppm，PH值的正确控制可以降低铁离子与柔软剂的结合显色)。

The impact on the softness effect of towels. Softeners generally use cationic surfactants. When using, it is necessary to avoid using water with poor quality (such as water with a CaCO3 hardness greater than 100ppm), and try to clean the residual alkali (high pH value) and anionic active substances of the detergent on the cloth as much as possible to avoid affecting the softness quality. Unclear water flow, poor water quality, residual alkaline detergents and anionic active substances in towel fibers can greatly inhibit and counteract the effect of softeners. After drying the towel, it will make it gray and hard, resulting in poor softening effect. However, the level of iron ions can only reach 0.2ppm, and proper pH control can reduce the binding color of iron ions with softeners.

本文由酒店布草友情奉献.更多有关的知识请点击:http://www.jnadx.com 真诚的态度.为您提供为全面的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待

This article is dedicated to the friendship of hotel linen. For more information, please click: http://www.jnadx.com Sincere attitude. We will provide you with comprehensive services. We will gradually contribute more relevant knowledge to everyone. Stay tuned