Chemical fiber production anti-static safety regulations
In the first chemical fiber production process, equipment (such as feeders, rollers, etc.) and chemical fiber or chemical fiber contact each other and they are charged when compressed, stretched or even dried in the air. . Most of the chemical fiber raw materials and semi-finished products have resistivities greater than 1×10 9 Ω·m, and the generated static charges are not easily leaked, and static electricity is easily accumulated. This rule does not apply to the antistatic treatment of liquids, powders, etc. in chemical fiber production. 1. When there is a potential difference between human beings and other objects and a discharge occurs, the human body suffers from mental stress due to electric shock, and may cause secondary accidents. 2. Repulsion and attraction due to static electricity Even if the electrostatic potential is not high (such as several hundred volts), it will cause the proliferation of fibers, increase the fly, wind the rollers and rollers, etc., and increase the breakage, resulting in abnormal production. 3. After chemical fiber is electrostatically charged, it is easy to absorb dust and so on, which affects the quality of chemical fiber. 4. In the production of non-woven fabrics (such as carpets), in the process of opening the fibers, the pressed fibers are subjected to various impacts, and the electrostatic charges are generated by the friction, so that loose fibers are attached to the frames, pipes, etc., resulting in fibers. Uneven thickness affects the unevenness of the product. 5. Electrostatic operation makes the fiber package not tight, affecting storage and increasing transportation costs. 6. Due to the influence of static electricity, a large amount of chemical fiber dust flies, causing pollution to the production environment. Article 3 Where there are electrostatic hazards in the process, equipment or place, the corresponding anti-static safety measures should be adopted so that the electrostatic potential of the insulator is controlled below the recommended allowable value: (1) The static potential of the insulator should be controlled to 10kV or less only to prevent the electric insulator from causing electric shock to the operator. 2. In the event of electrostatic shock to the operator, it may cause a secondary accident. In addition to the static potential of the insulator should be controlled below 10kV, appropriate safety measures should be taken for the equipment or device. Article 4 Chemical fiber production adopts measures to increase the relative humidity of the surrounding environment of the hydrophilic insulating material to prevent the accumulation of static electricity. Without affecting the quality of the product, the relative humidity of the surrounding environment of the charged object is controlled at more than 60%. Article 5 The role of antistatic oil: Some antistatic oils can ionize in water to increase their electrical conductivity. Most antistatic oils can increase moisture absorption. 1. Requirements for anti-static oil: After the anti-static oil agent is added, the properties of the fiber can not be deteriorated, and there is no corrosive effect on the machinery and equipment. It can not cause pollution of the production environment and the impact on human health. The performance of antistatic agents should be stable and significant. 2. Selection and dosage of antistatic oil: According to the product variety, specification and holding requirements, processing conditions, and according to the requirements of the post-processing equipment, choose the appropriate antistatic oil agent, the amount of oil added, so that the product reaches The resistance value stipulated by the quality standard, if not specified in the standard, the resistivity of the product shall be less than 1×10 9 Ω·m. 3. The method of adding anti-static oil agent: chemical fiber semi-finished product or after one or more uniform spraying, impregnation or adding before fiber molding. Article 6 uses a static eliminator or ionizes the air surrounding the charged body to eliminate the static charge accumulated on the processed material. 1. Selection principle of static eliminator: The static eliminator should be selected according to the level of the object's electrostatic potential, elimination requirements, operating characteristics, and the nature of the medium. 2. Types of static eliminators: Inductive electrostatic eliminators, high-voltage corona discharge static eliminators, ion flow static eliminators, and radioisotope static eliminators. 3. The selection of the installation position of the static eliminator: It is convenient for the process operation, eliminating the effect of static electricity, relative to the maximum potential of the charged body, approaching the charged body, and avoiding the metal background. Article VII of the selection of machine parts and materials, should consider the use of static electricity sequence selected to generate the opposite charge to neutralize, thereby eliminating or reducing static electricity. 1. When chemical fiber is drafted, the rubber coating of the drafting device should be conductive rubber. 2. Polyethylene staple fiber conveyor belt should use conductive rubber products or anti-static measures. 3. Doffing of polyester filaments and nylon filaments after doffing should be done with paper cylinders or static-conducting plastic cylinders. Plastic cylinders with good insulation and untreated must not be used. Article 8 Electrostatic grounding is used to cause static charges generated on the object to leak to the ground, thereby limiting the potential rise of the electrostatic object or limiting the resulting electrostatic discharge. 1. Requirements for electrostatic grounding (1) The conductors connected and grounded by static electricity should be solid and reliable to ensure the integrity of the electrical path; (2) The resistance value of the electrostatic grounding system should meet the requirements; (3) The resistance value of the electrostatic grounding system shall be tested once a year and a measurement data file shall be established. If the resistance value of the system under test does not meet the requirements, it shall be overhauled immediately; (4) For metal conductors, the grounding resistance value of the conductor should be measured directly; for other objects, the leakage resistance value should be measured; for the location with jumper wiring, the resistance value of the jumper wiring should be measured; (5) During the production process, when the partial repair of the equipment, etc., will cause the disconnection of the static connection circuit of the object, temporary grounding should be done in advance. After overhaul, it should be restored in time and the resistance value should be retested. 2. The range of static grounding (1) Parts of the production facility that generate static electricity that will harm the production and subject the human body to electrostatic shocks, and that can be grounded to eliminate static electricity; (2) When the metal conductor on the production device is likely to generate static electricity and electrification, regardless of its size, it should be electrostatically grounded; (3) When a conductor with a conductivity of 1 × 10-8 S/m or more and an object with a surface intrinsic resistance of 1 × 109 Ω or less, there is a possibility of static electricity or electrification, a metal conductor that is tightly bonded to this object should be installed. Indirect grounding. 3 does not require static grounding (1) When metal conductors requiring static grounding have been connected to lightning protection or protective earthing systems that prevent leakage of electrical equipment; (2) Surfaces of non-conductors and surfaces with an inherent resistance of 1 × 10 11 Ω or more; (3) When a part of a metal conductor is buried underground or when there is a jumper to a building or metal such as a steel structure. 4. Grounding resistance (1) The total leakage resistance of the electrostatic grounding connection system should not be greater than 1 x 106 ohms, and the resistance value of the grounding body should not be greater than 100 ohms; (2) When the static electricity grounding is shared with other use grounds, the grounding resistance should be determined according to the grounding requirements of other applications. Article 9 The safety management of anti-static hazards involves the departments of equipment, electrics, crafts, quality, production, etc. The direct-affiliated enterprises shall clearly define the management responsibilities according to the actual conditions of the unit, and the safety supervision and management department shall be responsible for supervision and inspection. Article 10 The relevant personnel should master the technical knowledge of electrostatic safety and the precautionary measures against static electricity hazards, and be familiar with the production process and equipment operation status. When it is found that the electrostatic potential exceeds the recommended allowable value or the specific resistance of the fiber product exceeds the required value, which may cause an electrostatic accident and cause the product quality index to decline, it is entitled to stop production and report to the leader to take effective preventive measures as soon as possible. Article 11 All anti-static equipment, devices and protective articles shall be designated by a designated person to be inspected and repaired on a regular basis and filled out with a registration card. Article 12 The relevant technical department shall appoint a special person to carry out regular inspections of static electricity generating parts, static eliminators, and static grounding conditions in various technological processes of chemical fiber production, and to timely organize and archive the test results. 1. Prediction of electrostatic properties of fiber ribbons: The fiber specific resistance test has a fiber mass specific resistance measurement, fiber volume ratio resistance measurement, and fiber leakage resistance measurement. 2. During the actual production process, static electricity potential of the charged body can be measured in the item with static electricity detection (the static potential meter can be used with a non-contact type electrostatic meter with a maximum range of 100 kV, and can be measured by binning, with an accuracy of 5.0, using the instrument instructions). Measurement of ambient temperature and relative temperature and measurement of the operating speed of a charged body. 3. The purpose of static electricity detection: analyze the degree of harm, study preventive measures, determine the elimination effect. 4. The classification of static electricity detection items: when using new raw materials, the prediction of the charging performance of objects; the actual production process, the detection of the static state of the fiber belts; In the first chemical fiber production process, equipment (such as feeders, rollers, etc.) and chemical fiber or chemical fiber contact each other and they are charged when compressed, stretched or even dried in the air. . Most of the chemical fiber raw materials and semi-finished products have resistivities greater than 1×10 9 Ω·m, and the generated static charges are not easily leaked, and static electricity is easily accumulated. This rule does not apply to the antistatic treatment of liquids, powders, etc. in chemical fiber production. 1. When there is a potential difference between human beings and other objects and a discharge occurs, the human body suffers from mental stress due to electric shock, and may cause secondary accidents. 2. Repulsion and attraction due to static electricity Even if the electrostatic potential is not high (such as several hundred volts), it will cause the proliferation of fibers, increase the fly, wind the rollers and rollers, etc., and increase the breakage, resulting in abnormal production. 3. After chemical fiber is electrostatically charged, it is easy to absorb dust and so on, which affects the quality of chemical fiber. 4. In the production of non-woven fabrics (such as carpets), in the process of opening the fibers, the pressed fibers are subjected to various impacts, and the electrostatic charges are generated by the friction, so that the loose fibers are attached to the frames, pipes, etc., resulting in fibers. Uneven thickness affects the unevenness of the product. 5. Electrostatic operation makes the fiber package not tight, affecting storage and increasing transportation costs. 6. Due to the influence of static electricity, a large amount of chemical fiber dust flies, causing pollution to the production environment. Article 3 Where there are electrostatic hazards in the process, equipment or place, the corresponding anti-static safety measures should be adopted so that the electrostatic potential of the insulator is controlled below the recommended allowable value: (1) The static potential of the insulator should be controlled to 10kV or less only to prevent the electric insulator from causing electric shock to the operator. 2. When static electricity strikes an operator, it may cause a secondary accident. The electrostatic potential of the insulator should be controlled below 10 kV, and corresponding safety measures should be taken for the device or device. Article 4 Chemical fiber production adopts measures to increase the relative humidity of the surrounding environment of the hydrophilic insulating material to prevent the accumulation of static electricity. Without affecting the quality of the product, the relative humidity of the surrounding environment of the charged object is controlled at more than 60%. Article 5 The role of antistatic oil: Some antistatic oils can ionize in water to increase their electrical conductivity. Most antistatic oils can increase moisture absorption. 1. Requirements for anti-static oil: After the anti-static oil agent is added, the properties of the fiber can not be deteriorated, and there is no corrosive effect on the machinery and equipment. It can not cause pollution of the production environment and the impact on human health. The performance of antistatic agents should be stable and significant. 2. Selection and dosage of antistatic oil: According to the product variety, specification and holding requirements, processing conditions, and according to the requirements of the post-processing equipment, choose the appropriate antistatic oil agent, the amount of oil added, so that the product reaches The resistance value stipulated by the quality standard, if not specified in the standard, the resistivity of the product shall be less than 1×10 9 Ω·m. 3. The method of adding anti-static oil agent: chemical fiber semi-finished product or after one or more uniform spraying, impregnation or adding before fiber molding. Article 6 uses a static eliminator or ionizes the air surrounding the charged body to eliminate the static charge accumulated on the processed material. 1. Selection principle of static eliminator: The static eliminator should be selected according to the level of the object's electrostatic potential, elimination requirements, operating characteristics, and the nature of the medium. 2. Types of static eliminators: Inductive electrostatic eliminators, high-voltage corona discharge static eliminators, ion flow static eliminators, and radioisotope static eliminators. 3. The selection of the installation position of the static eliminator: It is convenient for the process operation, eliminating the effect of static electricity, relative to the maximum potential of the charged body, approaching the charged body, and avoiding the metal background. Article VII of the selection of machine parts and materials, should consider the use of static electricity sequence selected to generate the opposite charge to neutralize, thereby eliminating or reducing static electricity. 1. When chemical fiber is drafted, the rubber coating of the drafting device should be conductive rubber. 2. Polyethylene staple fiber conveyor belt should use conductive rubber products or anti-static measures. 3. Doffing of polyester filaments and nylon filaments after doffing should be done with paper cylinders or static-conducting plastic cylinders. Plastic cylinders with good insulation and untreated must not be used. Article 8 Electrostatic grounding is used to cause static charges generated on the object to leak to the ground, thereby limiting the potential rise of the electrostatic object or limiting the resulting electrostatic discharge. 1. Requirements for electrostatic grounding (1) The conductors connected and grounded by static electricity should be solid and reliable to ensure the integrity of the electrical path; (2) The resistance value of the electrostatic grounding system should meet the requirements; (3) The resistance value of the electrostatic grounding system shall be tested once a year and a measurement data file shall be established. If the resistance value of the system under test does not meet the requirements, it shall be overhauled immediately; (4) For metal conductors, the grounding resistance value of the conductor should be measured directly; for other objects, the leakage resistance value should be measured; for the location with jumper wiring, the resistance value of the jumper wiring should be measured; (5) During the production process, when the partial repair of the equipment, etc., will cause the disconnection of the static connection circuit of the object, temporary grounding should be done in advance. After overhaul, it should be restored in time and the resistance value should be retested. 2. The range of static grounding (1) Parts of the production facility that generate static electricity that will harm the production and subject the human body to electrostatic shocks, and that can be grounded to eliminate static electricity; (2) When the metal conductor on the production device is likely to generate static electricity and electrification, regardless of its size, it should be electrostatically grounded; (3) When a conductor with a conductivity of 1 × 10-8 S/m or more and an object with a surface intrinsic resistance of 1 × 109 Ω or less, there is a possibility of static electricity or electrification, the metal conductor to which this object is closely attached should be installed. Indirect grounding. 3 does not require static grounding (1) When metal conductors requiring static grounding have been connected to lightning protection or protective earthing systems that prevent leakage of electrical equipment; (2) Surfaces of non-conductors and surfaces with an inherent resistance of 1 × 10 11 Ω or more; (3) When a part of a metal conductor is buried underground or when there is a jumper to a building or metal such as a steel structure. 4. Grounding resistance (1) The total leakage resistance of the electrostatic grounding connection system should not be greater than 1 x 106 ohms, and the resistance value of the grounding body should not be greater than 100 ohms; (2) When the static electricity grounding is shared with other use grounds, the grounding resistance should be determined according to the grounding requirements of other applications. Article 9 The safety management of anti-static hazards involves the departments of equipment, electrics, crafts, quality, production, etc. The direct-affiliated enterprises shall clearly define the management responsibilities according to the actual conditions of the unit, and the safety supervision and management department shall be responsible for supervision and inspection. Article 10 The relevant personnel should master the technical knowledge of electrostatic safety and the precautionary measures against static electricity hazards, and be familiar with the production process and equipment operation status. When it is found that the electrostatic potential exceeds the recommended allowable value or the specific resistance of the fiber product exceeds the required value, which may cause an electrostatic accident and cause the product quality index to decline, it is entitled to stop production and report to the leader to take effective preventive measures as soon as possible. Article 11 All anti-static equipment, devices and protective articles shall be designated by a designated person to be inspected and repaired on a regular basis and filled out with a registration card. Article 12 The relevant technical department shall appoint a special person to carry out regular inspections of static electricity generating parts, static eliminators, and static grounding conditions in various technological processes of chemical fiber production, and to timely organize and archive the test results. 1. Prediction of electrostatic properties of fiber ribbons: The fiber specific resistance test has a fiber mass specific resistance measurement, fiber volume ratio resistance measurement, and fiber leakage resistance measurement. 2. During the actual production process, static electricity potential of the charged body can be measured in the item with static electricity detection (the static potential meter can be used with a non-contact type electrostatic meter with a maximum range of 100 kV, and can be measured by binning, with an accuracy of 5.0, using the instrument instructions). Measurement of ambient temperature and relative temperature and measurement of the operating speed of a charged body. 3. The purpose of static electricity detection: analyze the degree of harm, study preventive measures, determine the elimination effect. 4. The classification of static electricity detection items: when using new raw materials, the prediction of the charging performance of objects; the actual production process, the detection of the static state of the fiber belts; Hotel Towel,Cotton Hotel Towel,Hotel Terry Towel,Cotton Terry Towel Hebei Friend Co.,ltd , https://www.friend-apparels.com
The second chemical fiber electrostatic hazard
The grounding practices and requirements for static electricity should be referred to the relevant regulations.
The second chemical fiber electrostatic hazard
The grounding practices and requirements for static electricity should be referred to the relevant regulations.