Application of catalyst in automotive sponge seats

Application of catalyst in automotive sponge seats
The so-called car seat is the seat used when taking a car.
According to the location, it can be roughly divided into:
Front seats: headrest, backrest, cushion, (armrest),
Rear seats: (headrest), backrest, cushion, flank, (armrest).
Chinese name car seat
Foreign name CarSeat
Classification Leather seats, flannel seats, etc
1 Introduction
Price introduction
Basic Requirements
2 Seat type
Leather seat
Flannelette seat
child seat
Racing seats
3 Development history
4 Use, adjustment and production process of seats
Seat position adjustment
Adjustment method
Production process
Price introduction
The average price of ordinary car seats is about 850-1050 dollars, that of mid-range cars is about 1400-1600 dollars, and that of high-end cars is more than 2000 dollars. For most cars, seats are more expensive than gearboxes, chassis and body. [1]
Basic Requirements
Car seat drivers and passengers shall provide comfortable and safe driving and riding positions for easy operation. It shall meet the following conditions:
1. The seats in the whole compartment shall be arranged reasonably, especially the driver’s seat must be in a good position;
2. The shape design of the seat must conform to the physiological function of the human body, and strive to be beautiful on the premise of ensuring comfort;
3. The seat must be safe and reliable, with sufficient strength, stiffness and durability, compact structure and minimum mass;
4. Reliable locking devices shall be provided for various adjustment mechanisms set to meet the comfort of drivers and passengers to ensure safety.

Seat type
Car seats can be divided into separate seats and bench seats according to their shapes; It can be divided into fixed type, detachable type and adjustable type according to functions; It can be divided into single seat, double seat and multi seat seats according to the number of seats. According to the use performance of seats, it has developed from fixed seats to multi-function power adjustable seats, including air cushion seats, electric seats, stereo seats, spiritual recovery seats, and electronic adjustment seats. It can be divided into leather seats and flannelette seats according to the material. There are also seats for special use objects, such as children’s seats and racing seats.
Leather seat
China’s automobile industry has developed rapidly in recent years, and will continue to develop steadily in the future. There is a large demand for seats, so the passenger car seat industry still has huge development space in the future.
Two advantages
1. Easy to clean. Compared with fabric covered seats, dust can only fall on the leather seat surface, not deep into the seat. Therefore, it can be cleaned by gently wiping with a cloth. For flannelette seats, you need to buy seat cushions. Otherwise, once it is dirty, it may penetrate into the seat interior.
2. Easier heat dissipation. Although leather can also absorb heat, its heat dissipation performance is better.
Two deficiencies
1. The surface is vulnerable. Sharp objects are the bane of leather, so leather seats need more care.
2. It feels too slippery. Car owners may wear seat belts or add cushions to deal with this problem. In fact, the general manufacturer has dealt with this problem by wrinkling the leather surface to increase the friction coefficient.
Leather seats and flannelette seats
Leather seats and flannelette seats

1、 Cortex
Cattle leather, also known as Grade A leather, is a common material used in all car leather seats. Its surface is delicate and soft, with almost no pores visible. Its texture is strong and very flexible, so the seats processed are extremely beautiful.
Buffalo leather is also known as Grade B leather. Compared with cattle leather, it has the advantages of being strong and wear-resistant, but its disadvantages are not soft enough, poor feel, poor toughness, rough surface, and clear pores. The processed seats have a slightly worse appearance than cattle leather.
In addition to the above two kinds of cortex, there is also a kind of C-grade skin on the market, that is, the two-layer skin of cattle and buffalo.
Grade C leather is much different from Grade A leather and Grade B leather in terms of quality, beauty, price and service life. Therefore, customers are not recommended to use leather processing seats below Grade B.
Under normal circumstances, the seats made of Grade A leather and Grade B leather can generally be used for more than 5 to 8 years. That is to say, in China, leather seats can basically remain intact even if the car is scrapped or renewed.
The advantage of Grade C leather is that it is cheap, but its life is short. It is not advisable for customers to choose Grade C leather.
Whether it is good leather or secondary leather, the key is maintenance. If the daily maintenance is improper, the service life is less than 1 or 2 years. For this reason, it is recommended to maintain once a month and clean once three months, which can be used for life.
Just as leather shoes should be maintained with shoe polish frequently, leather seats should be maintained with leather polish (an oily agent). A protective film can be added to the leather seats to make the leather look more oily, smooth and bright, and prevent the leather from drying and peeling. The car owner can ask the car beauty shop to do it, or he can do it himself.
2、 Identifying True and False
Look, good leather has smooth surface, fine texture, bright color and small pores.
Touch, this is an effective way. Good leather feels soft, smooth and elastic. If the leather surface has many grains, is hard or sticky, it is inferior.
Although burnt synthetic leather is also leather, some gum chemicals will be added during the processing, and there will be some coke after burning, but the dermis will not.
Wipe the leather back and forth for nine times with a damp fine gauze. If there is discoloration, it indicates that the quality is not up to standard.
Pull: pull the leather with both hands to both sides. If there are seam marks or a light white background on the leather surface, it indicates that the elasticity and dyeing process of the leather are not up to standard.
3、 Cleaning and curing
Simple maintenance method for leather
1. The leather chair should be two feet away from the heat source as far as possible. If it is too close to the heat source, the leather will be cracked
2. Do not expose to the sun for a long time to avoid fading of leather
3. Clean and maintain frequently, and use a vacuum cleaner to remove dust and ashes once a week
4. Do not use a hair dryer to dry the leather quickly after cleaning, and do it naturally.
Maintenance method of leather seats
Middle and high class cars are mostly leather seats, and many drivers add leather seats themselves to show comfort, luxury and nobility, and have a long service life. Genuine leather is a natural thing, so you can’t treat it lightly when you take care of it. Wipe dry with cotton towel after washing. Daily maintenance, in addition to the well-known avoidance of sharp objects scratching the leather, but also pay attention to dust and sun protection. Because the dust is all pervasive, it will absorb the natural oil in the leather, and then it will become a dry leather. The burning sun will make human skin aging, which is also applicable to leather seats. So for the maintenance of leather seats, the following should be done:
1. The leather chair of the car should be two feet away from the heat source as far as possible. If it is too close to the heat source, the leather will be cracked;
2. Don’t expose yourself to the sun for a long time to avoid the leather fading. Especially for those who drive open sports cars, don’t damage the leather for a while just for the sake of the wind.
3. Clean and maintain frequently, and use a vacuum cleaner to remove dust every week;
4. After cleaning, do not use a hair dryer to dry the leather quickly. Use cotton paper or soft towel to dry it to avoid scratching the leather. You can also dry it naturally in a cool and ventilated place.
5. Do not use chemical cleaning agents. And use less of the so-called leather protectant, which will make the leather dependent. If you stop using the leather, it will be dull.
6. Middle and high class cars are mostly leather seats, and chemical cleaning agents cannot be sprayed on casually. Strong alkaline cleaning agents, such as soapy water, should be used. Soak it in warm water with a clean soft towel, hit a proper amount of soap evenly on the towel, and then gently wipe the seat. After wiping the soap, ventilate and dry it, and then wipe it twice with a wet towel without soap after cleaning. This method also applies to plastic parts in door trim and instrument panel. The reason is that soap has strong decontamination, no irritation to human skin, and is more practical for leather goods. After cleaning, do not use a hair dryer to dry the leather quickly. Use cotton paper or soft towel to dry it to avoid scratching the leather. You can also dry it naturally in a cool and ventilated place.
7. The great enemies of leather are scissors, hard objects and high temperature. At ordinary times, be careful of sharp objects tearing the dermis. In order to prolong the service life, avoid exposure to the sun and do not exceed 60 ℃. Therefore, for cars equipped with leather seats, it is easy to stick the sunscreen film (anti ultraviolet and infrared radiation). When parking at ordinary times, try to choose a cool place to avoid the leather hardening, cracking and fading caused by long-term exposure to the sun.
Flannelette seat

1、 Advantages and disadvantages
1. The surface is not easy to be damaged, and the service life is long. In case of knives, scissors, needles, etc., the leather will leave marks. In comparison, flannelette is less delicate. In addition, the cost of flannelette is far lower than that of genuine leather. Of course, more importantly, leather is more prone to aging than flannel, and the service life of flannel seats is longer.
2. The seat is stable and skid resistant. The flannelette seat is more stable when sitting, and there is no feeling of slipping.
In addition, it has the characteristics of low price, light weight and good air permeability.
1. It is easy to hide dirt and not easy to clean. The dust will go deep into the seat, so the cleaning work is heavy, so you need to buy a cushion for the flannel seat, otherwise once it is dirty, it may penetrate into the seat.
2. Poor heat dissipation. The seats of a vehicle that is scorched by the sun at noon in summer must be very hot. But if it is a leather seat, you can beat it with your hands to dissipate the heat, or you won’t feel so hot after sitting on it for a while. The flannelette seat does not have such good heat dissipation.
Flannelette seat
Flannelette seat
2、 Cleaning and curing
The seats made of fabric are relatively simple to handle. When the woven seat is not very dirty, you can use a long hair brush and a strong suction vacuum cleaner to brush the seat surface while using the suction port of the vacuum cleaner to suck out the dirt. For particularly dirty seats, the following steps should be taken during cleaning: first, clean the dirty parts with a hair brush, then use a clean rag dipped in a small amount of neutral detergent, fully wipe the seat surface under the condition of half dry and half wet, and then use a vacuum cleaner to clean the seats again and remove excess moisture.
Use a vacuum cleaner to remove dust and debris. If the dust condenses on the flannel cloth or is difficult to remove with the vacuum cleaner, first brush it with a soft brush and then use the vacuum cleaner to absorb it.
Wipe the fiber surface with a dry cloth, and then thoroughly dry the seat fiber. If the flannel cloth is still dirty, wipe it with mild soapy water and warm water, and then thoroughly dry it.
If the dirt cannot be removed, try the commercially available fiber cleaner. Use the cleaner in the less obvious position to make sure it will not have negative effect on the flannel cloth. Use the detergent according to the instructions.
Don’t eat in the car at ordinary times. When you have to eat, be careful not to let the fine residue of food fall on the seat to avoid the strange smell caused by mites or other microorganisms.
child seat
child seat
child seat
The full name of ISOFIX is “International Standards Organization FIX”, which means “International Organization for Standardization Fixture” in Chinese. It is a new standard for placing child seats in cars. This standard is being accepted by many automobile manufacturers. Its function is to make the installation of child seats fast and simple.
When the car leaves the factory, the ISOFIX interface has been installed in the car. Child seat manufacturers install ISOFIX connectors on child seats. In this way, the ISOFIX child seat can be easily fixed to the ISOFIX interface of the car.
The development of ISOFIX is an important development, because many people can not correctly install child seats. The survey shows that a large proportion of child seats are not safe enough to install.
Most child seats are placed on the seats in the car and secured with cross body shoulder straps (sometimes only with a belt). However, different cars have different seats, safety belts and fixing methods. Different shapes of car seats, shorter safety belts and different anchor points will lead to some child seats being placed more forward or more backward. All these factors make it difficult to manufacture child seats suitable for all models.
ISOFIX is designed to solve all these problems. Its ultimate goal is to make any ISOFIX child seat you buy suitable for your car. You can simply plug it into the child seat interface.
Another function of ISOFIX is that it can establish a rigid connection between the child seat and the car to make it more stable.
Unfortunately, it takes a long time to develop the technical details of the ISOFIX standard. Upon completion of this work, Regulation R44.03 must be updated to add new standards.
The ISOFIX seats available in the market are only applicable to some models that have been tested.

1、 Security
The child seat is usually installed on the back seat of the car. If it is placed on the front seat, the front windshield will hurt the child in case of collision. The front airbag of many vehicles can protect passengers well, but it is a fatal killer for children whose bones are not fully developed. If the child’s height is lower than the car seat or the weight is less than the small safety bearing of the seat, the child seat should be installed backward. If the forward installation is adopted, the young child’s neck is easily accessible to absorb the impact force of the impact to a large extent, so that the child’s fragile neck can be protected. However, when the child’s height exceeds the seat or weight exceeds the safety standard, such a backward installation is relatively unsafe. The backward installation and forward installation depend on the size of the child. At the same time, professional technicians should also be consulted when purchasing, and the installation should be carried out after detailed understanding.
child seat
child seat
2、 Purchasing method
Only when children’s safety seats are correctly purchased and used can they provide due safety guarantee for children’s riding safety.
Don’t make a purchase decision too quickly. Before purchasing, carefully read the user manual and product catalog provided by the seat manufacturer, and understand the characteristics and scope of use of each model in detail. You may want to consult the car manufacturer about this product to determine whether the seat of this model can be well installed in your car. Think about how you will use it. For example, if you need to install and remove the child seat frequently, a lighter seat will be more suitable for you.
Don’t buy used seats. Cracks have even occurred due to plastic aging or long-term compression
child seat
child seat
Collision may lead to hidden trouble of second-hand seats, which may lead to failure to play its due protective role in case of traffic accidents. It is also difficult for us to understand the past use background of these seats.
Be sure to fill in the receipt and send it back to the seat manufacturer. It is convenient for manufacturers to notify you in time when they find quality problems and update product information. Moreover, in case of design and manufacturing defects, you will not give up the right to be recalled.
3、 Installation steps
Whether the installation method is correct is crucial for the child safety seat to play its due protective role.
1. Carefully read the operating instructions provided by the manufacturer and install the seats in strict accordance with the requirements. If the instruction manual is lost, consult the manufacturer and ask for another one.
2. Install the child seat in the rear seat of the car as much as possible.
3. After the child safety seat is fastened to the car seat, the seat shall be pressed onto the car seat with slight force and then fastened to ensure fixation.
4. The seat belt should not have any slack.
5. Under no circumstances should you make any changes to the design of the child safety seat or the car safety belt without authorization, so that an unsuitable child safety seat can be installed on your car.
6. If you often disassemble the child safety seat, you should carefully check whether it is properly placed after each installation. Even if it is installed on the vehicle for a long time, regular inspection shall be carried out to ensure that the installation is firm.
7. If you think there is anything wrong with your installation, be sure to ask relevant personnel to check for you, so as not to leave any potential safety hazard.

4、 Installation inspection
1. Is the direction wrong. The baby seat must be installed backward, and can only be installed forward after the baby can sit.
2. Installation position. It is not recommended to install the car child seat on the front passenger seat for safety; During the journey, the middle position of the rear seat is the right place to install the baby seat.
3. Airbag. Not only the front airbag will cause harm to the baby; You must check carefully to ensure that all the air bags around the baby are invalid. This must be confirmed.
4. Whether the method is correct. The safety belt must be installed in the specified way, and the hole through which the safety belt should pass is the hole, only in this way can the stability be guaranteed; The product manual should be put in the car so that you can refer to it at any time during installation.
5. Stability. After installation, you should shake it a few times, or kneel on the seat and shake it a few times to see if its deviation range can not exceed 2cm. If it exceeds the range, it means that your installation is unqualified, and you should install it again
6. Baby comfort. Adjust the distance between the safety belt and the baby’s body. It is better to put 2 fingers in, not too tight. The lower leg guards should also be adjusted, not too tight. If necessary, blanket or towel can be used.
5、 Structural characteristics
Child safety seats have been widely used in Europe and the United States. As the number of private cars in China continues to rise, many families with children will worry about the safety of children riding. When choosing products, you must choose the right one, but not necessarily the expensive one. The safety seat can completely protect the baby’s head, brain and all parts of the body, and can completely absorb the instant impact on the baby’s head, brain and all parts of the body.
The seat completely eliminates any mistakes that may occur when people hold it, and also completely avoids all kinds of accidents that may occur when children ride alone, such as touching and moving; It can provide strong protection, buffering and maintenance for children during normal driving or in case of an accident.
The seat adopts an ergonomic shape that conforms to the characteristics of children’s body shape, fully matching the physiological characteristics of children of different ages, so that children can sit on it more considerate and comfortable.
6、 Usage
No matter how short the journey is, you should use the child safety seat every time you drive with your children.
1. Before starting, take time to check if the child is securely and comfortably strapped. Make sure that the belt used to tighten the child is adjusted to the proper length – it is advisable to insert only two fingers between the child’s chest and the belt.
2. Don’t put the buckle clip of the tension belt on the child’s belly.
3. The leg belt passes through the pelvis (not the stomach), from one hip bone to the other; The diagonal belt should be attached to the child’s shoulder, not the neck (some seats have a clip to help secure the belt). Never put the seat belt on the child’s arm or back.
4. Make sure that the safety belt passes through the safety seat in the correct way. Some seats provide an alternative passage for use when the car seat belt is short and cannot pass through the main passage.
7、 Cleaning and maintenance
1. Remove the cloth cover and dry it naturally after hand washing with laundry detergent or baby specific clothes cleaner.
2. Wipe the plastic part gently with a damp cloth.
3. If the child seat is damaged, it should be repaired in time to prevent children from pulling the damaged part more and more.
4. Put the child seat in a dry place to avoid long hair.
5. When reinstalling and using, carefully check whether the installation is correct and firm.
8、 Precautions
1. 0 to 1 year old infants are suitable for infants under 18 kg
The baby seat at this stage must be installed backward until the baby can sit up by himself.
2. Children between 1 and 3 years old are suitable for children under 9-25kg
Let children between 1 and 3 years old sit in the rear facing safety seat as long as possible. This is a good way to protect them. They should always sit in the rear facing safety seat until they reach the height or weight limit allowed by your car seat manufacturer. Once your child grows taller than the rear facing safety seat, he will be ready to sit in the front facing safety seat with harness. When the car is facing back, the impact force will be distributed on the whole back and head to reduce the impact on the neck caused by the frontal impact.
3. Suitable for children aged 4 to 7 up to 15-36 kg
Let children aged 4 to 7 sit in the forward facing safety seat with harness until they reach the height or weight limit allowed by your car seat manufacturer. Once they grow taller than the forward facing seat with harness, it is time to let them sit on the booster seat but still sit on the back seat.

4. Children aged 8 to 12
Have children aged 8 to 12 sit in their booster seats until they are old enough to fit the seat belts correctly. With the booster seat cushion, the child’s body will be raised to a certain height. In the event of a collision, the standard seat belt in the car will cover the stronger part of the body. Research data show that children who use booster seats are about 75% less likely to be injured than children who do not use fixtures.
Racing seats
Racing seats
Racing seats
Racing seats after loss of comfort
The professional bucket seat is much lower than the ordinary seat. It has no recline and front and rear height adjustment. It is designed for a driver separately. The seat position is completely tailored to the driver’s figure and welded to the steel frame. Excess regulation system will increase weight and be prone to failure. Racing seats are usually made of hard plastic or carbon fiber as a skeleton, and are covered with lightweight anti-skid fabrics. There are holes above the backrest for the passage of professional safety belts. There are protective supports at the waist and at both sides of the head. The racers are fully bound to the seats to prevent the impact of centrifugal force on the riders during rapid cornering. The backrest and cushion are basically fixed at an angle of 90 degrees. Such a seat has no comfort at all. Its only purpose is safety. Only a few original cars use racing seats as the standard configuration when they leave the factory. In order to meet the fans’ desire for racing, the refitting manufacturer has introduced adjustable racing seats. Good racing seats have first-class quality, and of course the price is also first-class.
development history
As an important part of automobile interior decoration, the development of automobile seat cushion also promotes the development of automobile interior decoration industry. In its development process, it has condensed several characteristics of this industry during this period.
1. In the embryonic stage, there was no design before 2000, and the quality was generally small, with high profits for manufacturers and few dealers.
2. In the initial development period, 2000-2002, there was no design, the quality was average, the quantity increased, the scale was small, the production quantity increased, and the profit was acceptable.
3. During the rapid development period, from 2002 to 2005, the design began. The number of high, middle and low quality divisions increased significantly, with different sizes and scales and low profits. The number of brand operations increased significantly, with low profits. Everyone started to compete for brands.
4. In the stable development period, after 2005, the design was emphasized, and the quality differentiation was more obvious. The manufacturers frequently closed down and opened new ones, with different sizes and profit differentiation. The brand operation began to strengthen, and large-scale dealers appeared. The large dealers took counter control of the manufacturers, and the small dealers took over the brands.
5. The monopoly period is unpredictable. According to the needs of the market, there is a reasonable situation that high-end products with excellent design and quality coexist with low-cost products. There are large-scale manufacturers and a large number of subordinate co processing plants. The profits are stable. The brand starts to seize most of the market. There is a combination or integration of large-scale dealers and manufacturers, and the profits are stable.
In these five stages, there are different cooperation relationships between manufacturers and dealers, and the same products also become different due to the needs of the market. However, in general, the development of products is obvious because of different stages. Excellent design and good workmanship have become an important part of different high-end products in this market.
Use, adjustment and production process of seats
If there is no special accident, the car cloth seat cover should be removed and cleaned every six months. The leather seat cover should be wiped frequently. When scrubbing, you must pay attention not to use acidic liquid to scrub, because the leather seat cover has been chemically treated, and acidic cleaner may affect its life.
Don’t expose the car to the sun. The strong sunlight may cause the leather seat cover to oxidize and give off an unpleasant leather smell. In addition, the strong sunlight may also cause the seat cover to crack.
Under normal circumstances, leather seat covers should be replaced every 5 years, and cloth seat covers should be replaced every year.
Car seat
Car seat
Seat position adjustment
Many drivers often neglect to adjust the position of the driver’s seat before driving. In fact, the correct driving posture can effectively protect the driver’s safety. If the seat position is not appropriate, it will affect the driver’s vision and control sensitivity, and even lead to traffic accidents, hurting yourself and others.
Therefore, one thing before driving is to adjust the height of the driver’s seat. The correct seat height shall be adjusted so that the driver’s vision will not be blocked by the steering wheel, and all important instruments and street signs can be clearly seen. After adjusting the height of the seat, adjust the front and rear positions of the seat. First, you should lean your hips back as far as possible to reach between the cushion and the back of the chair, so that you can sit more stably without shaking. After you sit firmly, you should pay attention to the position of your hands and feet. Put your left and right hands respectively at the 9 and 3 o’clock positions of the steering wheel. At this time, you should not let your back leave the seat back. If you leave, it means you sit too back and must move the seat forward. The other two hands should be slightly bent, so that in case of an accident, the impact force can be effectively dispersed and the force can not be concentrated on each joint of the arm.
In addition, the position of the left and right feet must be able to keep the legs bent when the pedal is pressed to the bottom. If your legs are straight when you step on the pedal to the bottom, you must pull the seat forward. It is worth noting that the knee should not be pressed against the steering column, and a certain distance should be kept, otherwise the foot movement will be affected and the reaction will not be timely.
The safety belt is a very effective safety device, which can effectively relieve people’s forward momentum. The safety belt also has its fastening method. Generally, the position where the safety belt is pulled down in the car can be adjusted. The correct position is to adjust it to the position where it leans against the B-pillar and is the same or nearly the same height as the eyes when the safety belt is not in use. In this way, when the safety belt is buckled, it will just pass through the chest and clavicle. Once the impact occurs, it will not cause the impact force to focus too much on a certain position and hurt passengers.
Adjustment method
The driver’s seat shall protect the waist when keeping the seat surface and backrest at an angle of about 100 degrees. This is because when people lean against the seat back with an inclination of 100 degrees, they lean back slightly, which is just in line with the natural curve of our waist bending slightly. At this time, the bulge part designed at the waist back of the car seat can reduce the pressure on the waist.
In life, many novice drivers like to adjust the back of their seats straight, thinking that sitting straight is more effective. But in fact, according to our waist curve, the lumbar spine is straight, and the pressure it bears is also large, which is adverse to the waist.
Experts suggest that you should check the back of your seat before driving today. If you are afraid that 100 degrees is not easy to master, you can first straighten the back of the chair, and then let the headrest of the chair lean back a fist or so.
If you want to drive a long-distance car, it is recommended to put a small cushion on your back to better protect your waist.
Production process
It is difficult and simple to make the chair. Two or three people and a leather sewing machine can wrap the leather chair. It looks OK on the surface, but it is much worse for an expert.
Leather chair plate making is a basic and important work, and an important indicator to measure the quality of leather chairs. The pattern of leather chairs is controlled by experienced professional technicians. After the version is determined, the production process will begin.
The step is to cut skin. A piece of cowhide is about 40 to 50 square feet. The leather and leather surface of the cow back are good leather parts. They are generally used for the backrest and cushion of the seat. Because these two parts of the seat are subject to long-term pressure and friction, they are also easy to feel. The leather surface of tripe and neck is poor. It is generally used for the skirt of seats or parts that are not easy to see. The leather has a certain stretching direction like the cloth. Some leather chairs appear concave convex after sitting for a month or two, most of which are caused by improper cutting direction.
The second step is sewing. After the leather is cut, the sewing process begins. There is also some emphasis here. Generally, 12 to 15mm thick sponge with mesh bottom is also placed under the leather. Note that some stores cut corners here. When sewing, it is very important whether the workers are skilled. Once the leather is sewn, it cannot be changed, or obvious pinholes will be left on the leather. When checking, pay attention to whether the needle distance of open thread is even, whether the leather head is exposed, whether there is burr and thread head, and whether the color of thread and leather is consistent.
The third step is to fit the seat. In short, it is to fit the sewn leather cover on the seat. Simple to say, but not easy to do. When fitting, the leather case will be torn or scratched by a little carelessness. After fitting, the leather case should be firmly attached to the seat by tapping and pulling. The clips for fixing the leather case should be rust proof, and the size and tightness of the clips should be consistent. When assembling the seat, the seam between the cushion and the cushion should be symmetrical and neat.
The fourth step is to reinstall the seat. The space of the door and the interior of the car is limited, and the size of the seats is not small, and they are relatively heavy. When reinstalling, it is necessary to avoid scratching the seat surface and touching the car paint, so it must be done according to the requirements of the reinstallation process, otherwise, the previous work will be wasted if there is any carelessness.
Generally, leather chairs for five seater cars can be made in 3-4 hours.
After using the leather chair for a period of time, some owners will encounter some problems:
1. Foaming: also called separation layer, mainly due to the quality of glue. Imported leather shall be selected as far as possible.
2. Needle thread crack: leftover problems in material or process. Find the shop owner to repair it.
3. Discoloration: leather quality problem. Try to choose imported leather.
4. Deformation: mainly concentrated in the cushion and backrest. It is a problem with the operation process. It is not cut according to the texture of the leather. Ok, that’s all for the introduction of leather chair making. I hope it will be helpful to you.

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