CN107312895B - Production method of multifunctional negative oxygen ion automobile interior leather - Google Patents
Production method of multifunctional negative oxygen ion automobile interior leather Download PDFInfo
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- CN107312895B CN107312895B CN201710658218.XA CN201710658218A CN107312895B CN 107312895 B CN107312895 B CN 107312895B CN 201710658218 A CN201710658218 A CN 201710658218A CN 107312895 B CN107312895 B CN 107312895B
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C1/00—Chemical treatment prior to tanning
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C1/00—Chemical treatment prior to tanning
- C14C1/08—Deliming; Bating; Pickling; Degreasing
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C11/00—Surface finishing of leather
- C14C11/003—Surface finishing of leather using macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C13/00—Manufacture of special kinds or leather, e.g. vellum
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C15/00—Apparatus for chemical treatment or washing of hides, skins, or leather
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/04—Mineral tanning
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
Abstract
The invention relates to a production method of negative oxygen ion multifunctional automobile interior leather. The method comprises the steps of fleshing, liming, deliming, softening, pickling, tanning, retanning, neutralizing, dyeing, fatliquoring, drying, milling, priming coating, middle coating, embossing and top coating, wherein the pickling and tanning steps sequentially comprise pickling with salt and tanning with aldehyde, and the pickling with salt is as follows: the liquid ratio of the skin after softened water washing is 50%, 50 parts of water is added based on 100 parts of the skin by mass, the temperature is controlled to be 20 +/-2 ℃, 7 parts of sodium chloride is added, 0.5 part of 10 wt% dilute formic acid is added after 15 minutes of reaction, 0.5 part of 10 wt% dilute formic acid is added again after 30 minutes of reaction, 0.35 part of 5 wt% dilute sulfuric acid is added after 30 minutes of reaction, 1 time of sulfuric acid is added in the same way after 30 minutes of reaction for 90 minutes, the pH value is controlled to be 2.8 +/-0.1 after the dilute sulfuric acid is added, and the reaction is carried out for 60 minutes; the invention has the functions of releasing negative oxygen ions for a long time, sterilizing and inhibiting bacteria, has the function of efficiently adsorbing, decomposing and degrading harmful gases such as formaldehyde and the like, and has good softness and setting property.
Description
Technical Field
The invention belongs to the technical field of new automotive interior materials, and particularly relates to a production method of multifunctional negative oxygen ion automotive interior leather.
Background
The quality of air in automobiles is increasingly concerned by consumers, and most of the air in automobiles is in a closed state when the automobiles are used, so the good and bad emission of interior materials and the influence on the air quality are important factors directly influencing the health of the consumers. Conventional automotive interior leather is also generally produced from salted raw cowhide through the processes of fleshing, liming, deliming, softening, pickling, tanning, retanning, neutralization, dyeing, fatliquoring, drying, milling, undercoating, embossing, top coating, etc., and the dermal interior material produced using the conventional process conditions and materials has the following problems:
1. in order to achieve beautiful coating and comfort, the existing product has moderate softness and poor shaping performance;
2. the bending resistance is poor, and the continuous kneading and bending cannot be withstood;
3. the genuine leather product prepared by the existing method has obvious genuine leather smell and diffused substances, air circulation in the automobile is not good, most users are not familiar with the genuine leather smell, and the genuine leather product is easy to grow mould and the like, thereby affecting the health of the users.
Disclosure of Invention
The invention aims to solve the technical problem of providing a production method of the multifunctional negative oxygen ion automobile interior leather aiming at the defects in the prior art, which has the functions of releasing negative oxygen ions for a long time, sterilizing and inhibiting bacteria, has the functions of efficiently adsorbing, decomposing and degrading harmful gases such as formaldehyde and the like, is soft and good in shape-fixing property, has enough fiber toughness and is bending-resistant, and the production process is environment-friendly and safe.
The technical scheme adopted by the invention for solving the technical problem is as follows: the production process of the multifunctional negative oxygen ion automobile interior leather comprises the steps of fleshing, liming, deliming, softening, pickling, tanning, retanning, neutralizing, dyeing, fatliquoring, drying, milling, priming coating, middle coating, embossing, top coating and the like, and is characterized in that:
the pickling and tanning steps sequentially comprise pickling by adding salt and tanning by adding aldehyde, wherein the pickling by adding salt is as follows: the liquid ratio of the skin after softened water washing is 50%, 50 parts of water is added based on 100 parts of the skin by mass, the temperature is controlled to be 20 +/-2 ℃, 7 parts of sodium chloride is added, 0.5 part of 10 wt% dilute formic acid is added after 15 minutes of reaction, 0.5 part of 10 wt% dilute formic acid is added again after 30 minutes of reaction, 0.35 part of 5 wt% dilute sulfuric acid is added after 30 minutes of reaction, 1 time of sulfuric acid is added in the same way after 30 minutes of reaction for 90 minutes, the pH value is controlled to be 2.8 +/-0.1 after the dilute sulfuric acid is added, and the reaction is carried out for 60 minutes;
the aldehyde tanning comprises the following steps: adding 3.5 parts of modified aldehyde tanning agent into the salted pickled leather drum, reacting for 180 minutes, controlling the temperature to be 22-25 ℃, controlling the pH value to be 2.7 +/-0.1, adding 0.5 part of sodium formate, reacting for 30 minutes, adding 0.5 part of sodium formate and 3 parts of fragrant and phenanthrene tannin extract, reacting for 30 minutes, adding 0.4 part of baking soda, reacting for 30 minutes, adding 0.3 part of baking soda, reacting for 60 minutes, adding 3 parts of composite tanning agent RLS and 0.2 part of mildew-proof bactericide, reacting for 180 minutes, controlling the temperature to be 38-40 ℃, adjusting the pH value to be 4.6-4.7, cleaning for 20 minutes by 150 parts of normal temperature water after the reaction is finished, cooling and taking out the drum;
the retanning step comprises the following steps: putting the evenly-cut white skin into a rotary drum for rewetting, adding 200 parts of water at 40 ℃ by taking the white skin as 100 parts by mass, washing for 10 minutes by rewetting water, draining, then adding 200 parts of water at 30 ℃, adding 0.5 part of 10% formic acid and 2 parts of sodium bicarbonate, reacting for 50 minutes, then adding 2 parts of low-emission retanning agent QS and 4 parts of CF liq, controlling the pH value to be about 4.0 +/-0.1, reacting for 50 minutes, draining, adding 200 parts of water at 30 ℃ for washing for 15 minutes, draining, then adding 100 parts of water at 30 ℃, 2 parts of polymer fat liquor RV and 2 parts of MSG, and reacting for 30 minutes. And then adding 5 parts of Tara plant tannin extract, 2 parts of fragrant phenanthrene tannin extract, 5 parts of retanning agent VR, 3 parts of filler ZF and 3 parts of retanning auxiliary agent HO, and reacting for 30 minutes to finish retanning filling.
The neutralization step is as follows: adding 0.8 part of baking soda and 3 parts of retanning agent NG liq to react for 30 minutes, controlling the pH value to be 5.5 +/-0.1, adding 0.3 part of reducing agent sodium bisulfite and 0.2 part of antioxidant BHT, and effectively removing harmful substances such as acetaldehyde and formaldehyde possibly generated in the previous process under the combined action of the substances, and also preventing the relevant substances from generating oxidation reaction so as to strictly control the generation of aldehyde and ketone substances.
The dyeing steps are as follows: adding 7 parts of azo and harmful substance-free dye, 3 parts of PR-C leveling agent and 3 parts of TARA retanning agent into the rotary drum, reacting for 70 minutes, adding 0.7 part of 85% formic acid, controlling the pH value to be 4.8 +/-0.1, reacting for 10 minutes, adding 5 parts of retanning agent R12, reacting for 30 minutes, adding 100 parts of water at 60 ℃, rotating for 10 minutes to control the temperature in the drum to be 50 ℃, draining and controlling to be dry. After dyeing, 150 parts of hot water at 40 ℃ is added and rotated for 5 minutes, 10 parts of aldehyde-removing antibacterial agent CG2 (which can breathe and generate negative oxygen ions with multifunction and high efficiency) and 1 part of acrylic resin (which are mixed) are added, the leather is rotated for 30 minutes, and the leather is fixed in the integral fiber of the leather through the filling absorption effect of the leather, so that the negative ions are continuously generated on the flesh side of the leather after the finished product is obtained;
the step of fat liquoring is as follows: adding 2 parts of MSG fatting agent, 4 parts of SQS fatting agent with ultralow emission, 2.5 parts of 10% FGB grease and 3 parts of PFM-C retanning agent into the rotary drum, reacting for 60 minutes, adding 0.2 part of mildew preventive and 2 parts of compound auxiliary agent Levotan, reacting for 50 minutes, adding 3 parts of 85% formic acid into the rotary drum for three times, adding for 10 minutes for the first time, adding for the second time, adding for the third time after 10 minutes, reacting for 20 minutes after the addition is finished, draining; washing with 200 parts of water at 45 ℃ for 10 minutes, draining, adding 200 parts of water at 40 ℃, 1 part of odor regulator RA and 2 parts of odor absorbent AMF, strengthening absorption and removing the heavy leather odor of the leather by using the mechanical action of the rotation of a rotary drum for 45 minutes, adding 1 part of formic acid into the rotary drum, evenly adding the formic acid into the rotary drum for three times at intervals of 10 minutes, reacting for 30 minutes after the formic acid is added for the last time, adjusting and keeping the pH value to be 4.0, and taking out the leather from the drum.
The drying step is as follows: squeezing and stretching, vacuum drying and low-temperature hanging and airing, wherein the squeezing pressure is controlled at 30Bar, the stretching speed is 7 m/min, the humidity of the leather body after squeezing is 45%, the vacuum drying temperature is 45 ℃, the time is 120S, the low-temperature hanging and airing temperature is 35-38 ℃, the drying time is about 8 hours, and finally, when the moisture content in the leather is controlled at 12% -14%, the leather enters a step of softening and is controlled according to the required softness;
the coating steps are sequentially primary coating, intermediate coating, embossing and top coating, wherein a primary coating, an intermediate coating and a top coating are respectively adopted, the materials and the methods of the primary coating and the intermediate coating are similar, and the required pigment paste amount is respectively added into the primary coating and the intermediate coating according to the category difference and color matching requirements of target colors. The top layer coating comprises the following components in parts by mass: 15 parts of negative ion generator CG2, 20 parts of water-based pigment paste, 150 parts of water, medium-soft polyurethane resin PR30 parts, 80 parts of medium-hard polyurethane resin MELIO, 150 parts of delustering resin LV, 220 parts of delustering resin HS, physical property auxiliary SR50 parts, 50 parts of silicon-containing hand feeling agent and 10 parts of X-80 crosslinking agent.
The invention adopts a special pickling and tanning process, controls a proper pH value while fully degreasing, deliming and properly softening to remove fiber interstitium, adopts the modified aldehyde tanning agent and the fragrant tannin extract to cure the leather and simultaneously improve the fragrant fragrance of the leather, thereby relieving bad smell and organic matter influence of a leather product caused by the original leather. The retanning, neutralizing, dyeing and fatliquoring process not only screens and adopts chemical materials with low organic emission, but also adds an antioxidant and a reducing agent during neutralization, and strictly controls the generation of organic substances such as aldehyde and ketone. The aldehyde-removing antibacterial agent which can breathe and generate negative oxygen ions with multiple functions and high efficiency is added at the later stage of dyeing, and is CG2, and the aldehyde-removing antibacterial agent is fixed in the leather integral fiber through the filling and absorbing effect of the leather, so that aldehyde substances are effectively removed, and the meat surface of the leather coated into the seat can continuously generate negative ions. In the greasing process, the greasing agent is reasonably selected and matched, so that the greasing is uniform and is completely absorbed, the leather body is soft and moist for a long time, and the related physical properties of finished leather, such as light resistance, heat resistance, flame retardance, washing resistance and physical strength, are effectively improved. The special drying mode of wringing and stretching, vacuum drying and low-temperature hanging and drying lays a foundation for increasing the size of a product, controlling proper setting property and proper extensibility and elasticity, avoids the loss of grease or other retanning filling materials caused by high-temperature quick drying, effectively retains the retanning fatliquoring filling materials in the leather, and simultaneously, because of low drying temperature, the moisture is slowly lost, the leather is beneficial to retaining better hand feeling and elasticity, and simultaneously, the leather body is compact, has enough toughness and good resilience.
The bending resistance of leather is not only related to the elasticity of the leather blank, but also directly related to factors such as the penetration bonding fastness of the coating and the leather blank layer, the film forming property of the coating, the crosslinking degree of resin molecules and the like. According to the invention, the proportion of each layer of coating is optimized, so that the permeability and the film forming property of the coating are improved, the crosslinking degree is increased, and the extension among molecular chains is enhanced, thereby enhancing the bending resistance of the leather; the leather is coated with the water-based polyurethane and acrylic anion coating agent, and the anion generator CG2 and the cross-linking agent are mixed and added at the same time, after the leather is sprayed on the surface of the leather, the anion can be generated and released on the surface of the leather, so that the leather has the effects of efficiently and constantly releasing negative oxygen ions and resisting and inhibiting various bacteria; the product quality meets the requirements of customer standards, and meanwhile, the leather product for automobile interior decoration is free of harmful substances such as formaldehyde and acrolein, and the antibacterial and bacteriostatic capabilities of the product in the using process are improved.
Detailed Description
The production process of the present invention is described in detail below:
the production process comprises the steps of fleshing, liming, deliming, softening, pickling, tanning, retanning, neutralizing, dyeing, fatliquoring, drying, milling, priming coating, middle coating, embossing, top coating and the like, wherein:
the pickling and tanning steps sequentially comprise pickling by adding salt and tanning by adding aldehyde, wherein the pickling by adding salt is as follows: the liquid ratio of the skin after softened water washing is 50%, 50 parts of water is added based on 100 parts of the skin by mass, the temperature is controlled to be 20 +/-2 ℃, 7 parts of sodium chloride is added, 0.5 part of 10 wt% dilute formic acid is added after 15 minutes of reaction, 0.5 part of 10 wt% dilute formic acid is added again after 30 minutes of reaction, 0.35 part of 5 wt% dilute sulfuric acid is added after 30 minutes of reaction, 1 time of sulfuric acid is added in the same way after 30 minutes of reaction for 90 minutes, the pH value is controlled to be 2.8 +/-0.1 after the dilute sulfuric acid is added, and the reaction is carried out for 60 minutes;
the aldehyde tanning comprises the following steps: adding 3.5 parts of modified aldehyde tanning agent into the salted pickled leather drum, reacting for 180 minutes, controlling the temperature to be 22-25 ℃, controlling the pH value to be 2.7 +/-0.1, adding 0.5 part of sodium formate, reacting for 30 minutes, adding 0.5 part of sodium formate and 3 parts of fragrant and phenanthrene tannin extract, reacting for 30 minutes, adding 0.4 part of baking soda, reacting for 30 minutes, adding 0.3 part of baking soda, reacting for 60 minutes, adding 3 parts of composite tanning agent RLS and 0.2 part of mildew-proof bactericide, reacting for 180 minutes, controlling the temperature to be 38-40 ℃, adjusting the pH value to be 4.6-4.7, cleaning for 20 minutes by 150 parts of normal temperature water after the reaction is finished, cooling and taking out the drum;
the retanning step comprises the following steps: putting the evenly-cut white skin into a rotary drum for rewetting, adding 200 parts of water at 40 ℃ by taking the white skin as 100 parts by mass, washing for 10 minutes by rewetting water, draining, then adding 200 parts of water at 30 ℃, adding 0.5 part of 10% formic acid and 2 parts of sodium bicarbonate, reacting for 50 minutes, then adding 2 parts of low-emission retanning agent QS and 4 parts of CF liq, controlling the pH value to be about 4.0 +/-0.1, reacting for 50 minutes, draining, adding 200 parts of water at 30 ℃ for washing for 15 minutes, draining, then adding 100 parts of water at 30 ℃, 2 parts of polymer fat liquor RV and 2 parts of MSG, and reacting for 30 minutes. And then adding 5 parts of Tara plant tannin extract, 2 parts of fragrant phenanthrene tannin extract, 5 parts of retanning agent VR, 3 parts of filler ZF and 3 parts of retanning auxiliary agent HO, and reacting for 30 minutes to finish retanning filling.
The neutralization step is as follows: adding 0.8 part of baking soda and 3 parts of retanning agent NG liq to react for 30 minutes, controlling the pH value to be 5.5 +/-0.1, adding 0.3 part of reducing agent sodium bisulfite and 0.2 part of antioxidant BHT, and effectively removing harmful substances such as acetaldehyde and formaldehyde possibly generated in the previous process under the combined action of the substances, and also preventing the relevant substances from generating oxidation reaction so as to strictly control the generation of aldehyde and ketone substances.
The dyeing steps are as follows: adding 7 parts of azo and harmful substance-free dye, 3 parts of PR-C leveling agent and 3 parts of TARA retanning agent into the rotary drum, reacting for 70 minutes, adding 0.7 part of 85% formic acid, controlling the pH value to be 4.8 +/-0.1, reacting for 10 minutes, adding 5 parts of retanning agent R12, reacting for 30 minutes, adding 100 parts of water at 60 ℃, rotating for 10 minutes to control the temperature in the drum to be 50 ℃, draining and controlling to be dry. After dyeing, 150 parts of hot water at 40 ℃ is added and rotated for 5 minutes, 10 parts of aldehyde-removing antibacterial agent CG2 (which can breathe and generate negative oxygen ions with multifunction and high efficiency) and 1 part of acrylic resin (which are mixed) are added, the leather is rotated for 30 minutes, and the leather is fixed in the integral fiber of the leather through the filling absorption effect of the leather, so that the negative ions are continuously generated on the flesh side of the leather after the finished product is obtained;
the step of fat liquoring is as follows: adding 2 parts of MSG fatting agent, 4 parts of SQS fatting agent with ultralow emission, 2.5 parts of 10% FGB grease and 3 parts of PFM-C retanning agent into the rotary drum, reacting for 60 minutes, adding 0.2 part of mildew preventive and 2 parts of compound auxiliary agent Levotan, reacting for 50 minutes, adding 3 parts of 85% formic acid into the rotary drum for three times, adding for 10 minutes for the first time, adding for the second time, adding for the third time after 10 minutes, reacting for 20 minutes after the addition is finished, draining; washing with 200 parts of water at 45 ℃ for 10 minutes, draining, adding 200 parts of water at 40 ℃, 1 part of odor regulator RA and 2 parts of odor absorbent AMF, strengthening absorption and removing the heavy leather odor of the leather by using the mechanical action of the rotation of a rotary drum for 45 minutes, adding 1 part of formic acid into the rotary drum, evenly adding the formic acid into the rotary drum for three times at intervals of 10 minutes, reacting for 30 minutes after the formic acid is added for the last time, adjusting and keeping the pH value to be 4.0, and taking out the leather from the drum.
The drying step is as follows: squeezing and stretching, vacuum drying and low-temperature hanging and airing, wherein the squeezing pressure is controlled at 30Bar, the stretching speed is 7 m/min, the humidity of the leather body after squeezing is 45%, the vacuum drying temperature is 45 ℃, the time is 120S, the low-temperature hanging and airing temperature is 35-38 ℃, the drying time is about 8 hours, and finally, when the moisture content in the leather is controlled at 12% -14%, the leather enters a step of softening and is controlled according to the required softness;
the coating steps are sequentially primary coating, intermediate coating, embossing and top coating, wherein a primary coating, an intermediate coating and a top coating are respectively adopted, the materials and the methods of the primary coating and the intermediate coating are similar, and the required pigment paste amount is respectively added into the primary coating and the intermediate coating according to the category difference and color matching requirements of target colors. The top layer coating comprises the following components in parts by mass: 15 parts of negative ion generator CG2, 20 parts of water-based pigment paste, 150 parts of water, medium-soft polyurethane resin PR30 parts, 80 parts of medium-hard polyurethane resin MELIO, 150 parts of delustering resin LV, 220 parts of delustering resin HS, physical property auxiliary SR50 parts, 50 parts of silicon-containing hand feeling agent and 10 parts of X-80 crosslinking agent.
The main performance indexes of the product are as follows: the release amount of negative oxygen ions is more than or equal to 1200/cm 2. s; formaldehyde content is not detected; flame retardant properties: a-0mm/min (no ignition); the tensile strength is more than or equal to 130N; the unilateral tearing force is more than or equal to 25N; the atomization value is less than or equal to 5 mg; crack resistance normal state 100,000 times without cracks; the bonding fastness of the coating is more than or equal to 3.5N; the softness is more than or equal to 3.0 mm; no abrasion for abrasion resistance more than or equal to 500 times
This kind of car seat leather product can effectively control organic diffusion, has the clearance and can continuously decompose negative oxygen ion in order to purify the interior air quality of car to aldehyde material, and this kind of seat leather product caters to consumer's health demand, lets people enjoy the softness and the natural comfort of genuine leather simultaneously, also increases a high-end luxury of good health again. Because the leather is used for covering the automobile seat, higher requirements are also provided for the covering property, the wear-resisting property, the bending-resisting property and the like of the leather, the properties are determined by special processes and formulas in the manufacturing process, the leather is used as a traditional industry, the production process is approximately the same, and completely different products and properties are obtained due to the differences of process conditions, formulas and chemical materials used.
The above description is only an example of the present invention, and the present invention is not limited to the above example, and many modifications are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (6)
1. A production method of multifunctional negative oxygen ion automobile interior leather comprises the steps of fleshing, liming, deliming, softening, pickling, tanning, retanning, neutralizing, dyeing, fatliquoring, drying, milling, priming coating, middle coating, embossing and top coating, and is characterized in that the pickling and tanning steps sequentially comprise pickling with salt and tanning with aldehyde, and the pickling with salt is as follows: the liquid ratio of the skin after softened water washing is 50%, 50 parts of water is added based on 100 parts of the skin by mass, the temperature is controlled to be 20 +/-2 ℃, 7 parts of sodium chloride is added, 0.5 part of 10 wt% dilute formic acid is added after 15 minutes of reaction, 0.5 part of 10 wt% dilute formic acid is added again after 30 minutes of reaction, 0.35 part of 5 wt% dilute sulfuric acid is added after 30 minutes of reaction, 1 time of sulfuric acid is added in the same way after 30 minutes of reaction for 90 minutes, the pH value is controlled to be 2.8 +/-0.1 after the dilute sulfuric acid is added, and the reaction is carried out for 60 minutes;
the aldehyde tanning comprises the following steps: adding 3.5 parts of modified aldehyde tanning agent into a salted pickled leather drum, reacting for 180 minutes, controlling the temperature to be 22-25 ℃, controlling the pH value to be 2.7 +/-0.1, adding 0.5 part of sodium formate, reacting for 30 minutes, adding 0.5 part of sodium formate and 3 parts of fragrant-phenanthrene tannin extract, reacting for 30 minutes, adding 0.4 part of baking soda, reacting for 30 minutes, adding 0.3 part of baking soda, reacting for 60 minutes, adding 3 parts of composite tanning agent RLS and 0.2 part of mildew-proof bactericide, reacting for 180 minutes, controlling the temperature to be 38-40 ℃, adjusting the pH value to be 4.6-4.7, cleaning for 20 minutes by 150 parts of normal-temperature water after the reaction is finished, cooling and taking out the drum;
the retanning step comprises the following steps: putting the evenly shaved white skin into a rotating drum for rewetting, adding 200 parts of water at 40 ℃ by taking the white skin as 100 parts by mass, washing for 10 minutes by rewetting water, draining, then adding 200 parts of water at 30 ℃, adding 0.5 part of 10% formic acid and 2 parts of sodium bicarbonate, reacting for 50 minutes, then adding 2 parts of low-emission retanning agent QS and 4 parts of CF liq, controlling the pH value to be 4.0 +/-0.1, reacting for 50 minutes, draining, adding 200 parts of water at 30 ℃ for washing for 15 minutes, draining, then adding 100 parts of water at 30 ℃, 2 parts of polymer RV and 2 parts of MSG, reacting for 30 minutes, then adding 5 parts of Tara plant tannin extract, 2 parts of fragrant plant tannin extract, 5 parts of retanning agent VR, 3 parts of filler ZF and 3 parts of retanning auxiliary agent HO, and reacting for 30 minutes to finish retanning and filling.
2. The method for producing negative oxygen ion multifunctional automobile interior leather according to claim 1, wherein the neutralizing step is: 0.8 part of baking soda and 3 parts of retanning agent NGliq are added to react for 30 minutes, the pH value is controlled to be 5.5 +/-0.1, and 0.3 part of reducing agent sodium bisulfite and 0.2 part of antioxidant BHT are added.
3. The production method of negative oxygen ion multifunctional automobile interior leather according to claim 1, characterized in that the dyeing step is: adding 7 parts of dye without azo and harmful substances, 3 parts of PR-C leveling agent, 3 parts of Tara plant tannin extract into a rotary drum, reacting for 70 minutes, adding 0.7 part of 85% formic acid, controlling the pH value to be 4.8 +/-0.1, reacting for 10 minutes, adding 5 parts of retanning agent R12, reacting for 30 minutes, adding 100 parts of water at 60 ℃, rotating for 10 minutes to control the temperature in the drum to be 50 ℃, draining and controlling to dry, adding 150 parts of hot water at 40 ℃ to rotate for 5 minutes after dyeing, adding 210 parts of negative ion generator CG and 1 part of acrylic resin, rotating the drum for 30 minutes, and fixing the negative ion generator in leather integral fiber through the filling absorption effect of the leather so as to continuously generate negative ions on the flesh side of the leather after the finished product is obtained.
4. The production method of negative oxygen ion multifunctional automobile interior leather according to claim 1, characterized in that the step of fatliquoring is: adding 2 parts of MSG fatting agent, 4 parts of SQS fatting agent with ultralow emission, 2.5 parts of 10% FGB grease and 3 parts of PFM-C retanning agent into a rotary drum, reacting for 60 minutes, adding 0.2 part of mildew preventive and 2 parts of compound auxiliary agent Levotan, reacting for 50 minutes, adding 3 parts of 85% formic acid into the rotary drum for three times, adding for 10 minutes after the first addition for the second time, adding for the third time after 10 minutes, reacting for 20 minutes after the addition is finished, draining; washing with 200 parts of water at 45 ℃ for 10 minutes, draining, adding 200 parts of water at 40 ℃, 1 part of odor regulator RA and 2 parts of odor absorbent AMF, utilizing the mechanical action of the rotation of the rotary drum to enhance the absorption and remove the heavy skin odor of the dermis for 45 minutes, adding 1 part of formic acid into the rotary drum, evenly adding the formic acid for three times, adding the formic acid for 10 minutes at intervals, reacting for 30 minutes after the formic acid is added for the last time, adjusting and keeping the pH value to be 4.0, and taking out the leather from the drum.
5. The method for producing negative oxygen ion multifunctional automobile interior leather according to claim 1, wherein the drying step is: squeezing and stretching, vacuum drying and low-temperature hanging and airing, wherein the squeezing pressure is controlled at 30bar, the stretching speed is 7 m/min, the humidity of the leather body after squeezing is 45%, the vacuum drying temperature is 45 ℃, the time is 120s, the low-temperature hanging and airing temperature is 35-38 ℃, the drying time is 8 hours, and finally, when the moisture content in the leather is controlled at 12% -14%, the leather enters a step of softening, and the control target is set according to the required softness.
6. The method for producing negative oxygen ion multifunctional automobile interior leather according to claim 1, wherein the coating steps are sequentially base coating, intermediate coating, embossing and top coating, a primer coating, an intermediate coating and a top coating are respectively adopted, and required pigment pastes are respectively added into the primer coating and the intermediate coating according to the category difference and color matching requirement of target colors, wherein the top coating comprises the following components in parts by mass: 15 parts of negative ion generator CG2, 20 parts of water-based pigment paste, 150 parts of water, 30 parts of medium-soft polyurethane resin PR, 80 parts of medium-hard polyurethane resin MELIO, 150 parts of delustering resin LV, 220 parts of delustering resin HS, 50 parts of physical property auxiliary agent SR, 50 parts of silicon-containing hand feeling agent and 10 parts of X-80 crosslinking agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710658218.XA CN107312895B (en) | 2017-08-04 | 2017-08-04 | Production method of multifunctional negative oxygen ion automobile interior leather |
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| CN108315508B (en) * | 2018-03-05 | 2020-10-27 | 海宁森德皮革有限公司 | Production method of refreshing and fragrant low-emission low-fogging automobile interior leather |
| CN108977593B (en) * | 2018-07-19 | 2021-07-09 | 兴业皮革科技股份有限公司 | Production process for improving flatness and fineness of grain surface of leather |
| CN109554510B (en) * | 2018-10-19 | 2021-09-14 | 海宁森德皮革有限公司 | Method for producing low-odor clean automobile interior leather by using bio-enzyme technology |
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| CN110616283A (en) * | 2019-10-10 | 2019-12-27 | 四川圣达高环保科技有限公司 | Special coating material for leather with passive negative oxygen ion release function |
| CN110964864A (en) * | 2019-10-10 | 2020-04-07 | 四川圣达高环保科技有限公司 | Negative oxygen ion leather processing technology |
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| CN111187866B (en) * | 2020-01-13 | 2022-05-20 | 兴业皮革科技股份有限公司 | Negative oxygen ion leather and preparation method thereof |
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| CN112011655A (en) * | 2020-08-18 | 2020-12-01 | 罗莱生活科技股份有限公司 | Processing method of low-odor leather, leather product formed by processing method and cowhide mat formed by processing method |
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Denomination of invention: A Production Method for Negative Oxygen Ion Multifunctional Automotive Interior Leather Effective date of registration: 20230529 Granted publication date: 20200505 Pledgee: Zhejiang Haining Rural Commercial Bank Co.,Ltd. Pledgor: HAINING SENDE LEATHER Co.,Ltd. Registration number: Y2023980042053 |
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