With the development of the national economy, product packaging becomes more and more important. As a packaging form, plastic woven bags are widely used in product packaging of various industries due to their superior corrosion resistance and acid and alkali resistance.
Plastic woven bag packaging is also varied, there are for packaging powder materials such as cement, there are particles used to pack particles such as fertilizers, chemical raw materials, as well as for packaging foods such as sugar, flour.
However, the quality of plastic woven bags is unsatisfactory. In Xinjiang, which has a vast territory and a long transport distance, accidents that cause huge economic losses to the country and consumers due to the low strength of woven bags and the poor quality of woven bags cause accidents. , become a stumbling block to business development. How to improve the strength of woven bags and reduce the rate of broken bags has always been an urgent problem for woven bag manufacturers.
As a quality supervision agency, we must not only do a good job of supervising work in the large-scale development of the western region, but also need to serve the enterprises. We have done a lot of research in the inspection work for many years on the issue of how to improve the quality of plastic woven bags. That is, the relationship between the sewing intensity and the relationship between the sewing methods is discussed, and it is hoped that it will be helpful for the production enterprises.
There are two kinds of sewing methods for plastic woven bags: one is the sewing of civilian sewing machines; the other is the sewing of industrial sewing machines. Sewing with different methods has different effects on the strength and the drop test.
Sewing with a civilian sewing machine
The use of civilian sewing machine sewing pitch is small, the needle distance between 2-5mm, different stitches on the sewing strength has the following aspects: When the needle pitch is less than 3mm, due to the dense stitches, plastic flat yarn is In severe damage, the strength of the seam is significantly reduced. When the specimen is stretched, the wire is broken and the thread is not broken, so that the strength of the seam cannot meet the requirements. When the needle distance is between 3-4 mm, the number of needles is moderate and the flat yarn is damaged. Lighter, when the tensile failure of the sample, the sewing thread and the wire break at the same time, and the sewing strength can basically meet the standard requirements; when the needle distance is more than 4mm, although the flat yarn is less damaged, the line used by the civil machine is smaller, When the sample is stretched, the wire is broken and the wire is not broken, and the sewing strength cannot meet the requirements.
Sewing with industrial sewing machine
Industrial sewing machine sewing needle pitch is generally between 6-13mm, different stitches on the seam strength has the following aspects:
When the needle distance is more than 10mm, because the needle pitch is too large, some flat yarns are pulled out from the gap of the needle spacing during the stretching and the thread is not broken, so that the sewing strength is difficult to meet the standard requirements; when the needle distance is 6-8 mm, the needle is The number is moderate, there is no dehairing in the test, and when the sample is stretched and destroyed, the wire and the wire break simultaneously, and the sewing strength can meet the standard requirements; when the stitch length is less than 6mm, the sewing strength is easy to guarantee, but the thread amount is obvious. The increase will increase the cost. If the needle pitch is too small, the flat yarn of the woven bag will inevitably be damaged, and the sewing strength will decrease as the outside distance decreases.
Impact on drop test
Due to the small needle distance and the sewing of double lanes, the sewing machines for civilian use make the flat silk fibers more damaged, and the impact resistance of the flats is reduced when the sewing machine is dropped. The rate of broken bags is high. Industrial sewing machine sewing flat fiber is less damaged, and due to the thick line, the impact of the sewing site when the drop is higher, the rate of broken package is reduced.
In addition, sewing thread thickness also has a great influence on the sewing strength. The force of the thick line on the flat yarn is decomposed on a long circular arc line. The splitting ability of the flat yarn is weak, and the sewing strength is high; the force of the thin line on the flat yarn acts relatively at a certain point, and therefore The flat silk has a strong splitting ability and the sewing strength is low.
In summary, when the production enterprise is producing, it should use the industrial sewing machine to sew the sewing process. The stitch distance should be moderate and the line thickness should be appropriate. The sewing strength of the woven bag can be improved, and it is not easy to break the package when it is dropped.
Plastic woven bag packaging is also varied, there are for packaging powder materials such as cement, there are particles used to pack particles such as fertilizers, chemical raw materials, as well as for packaging foods such as sugar, flour.
However, the quality of plastic woven bags is unsatisfactory. In Xinjiang, which has a vast territory and a long transport distance, accidents that cause huge economic losses to the country and consumers due to the low strength of woven bags and the poor quality of woven bags cause accidents. , become a stumbling block to business development. How to improve the strength of woven bags and reduce the rate of broken bags has always been an urgent problem for woven bag manufacturers.
As a quality supervision agency, we must not only do a good job of supervising work in the large-scale development of the western region, but also need to serve the enterprises. We have done a lot of research in the inspection work for many years on the issue of how to improve the quality of plastic woven bags. That is, the relationship between the sewing intensity and the relationship between the sewing methods is discussed, and it is hoped that it will be helpful for the production enterprises.
There are two kinds of sewing methods for plastic woven bags: one is the sewing of civilian sewing machines; the other is the sewing of industrial sewing machines. Sewing with different methods has different effects on the strength and the drop test.
Sewing with a civilian sewing machine
The use of civilian sewing machine sewing pitch is small, the needle distance between 2-5mm, different stitches on the sewing strength has the following aspects: When the needle pitch is less than 3mm, due to the dense stitches, plastic flat yarn is In severe damage, the strength of the seam is significantly reduced. When the specimen is stretched, the wire is broken and the thread is not broken, so that the strength of the seam cannot meet the requirements. When the needle distance is between 3-4 mm, the number of needles is moderate and the flat yarn is damaged. Lighter, when the tensile failure of the sample, the sewing thread and the wire break at the same time, and the sewing strength can basically meet the standard requirements; when the needle distance is more than 4mm, although the flat yarn is less damaged, the line used by the civil machine is smaller, When the sample is stretched, the wire is broken and the wire is not broken, and the sewing strength cannot meet the requirements.
Sewing with industrial sewing machine
Industrial sewing machine sewing needle pitch is generally between 6-13mm, different stitches on the seam strength has the following aspects:
When the needle distance is more than 10mm, because the needle pitch is too large, some flat yarns are pulled out from the gap of the needle spacing during the stretching and the thread is not broken, so that the sewing strength is difficult to meet the standard requirements; when the needle distance is 6-8 mm, the needle is The number is moderate, there is no dehairing in the test, and when the sample is stretched and destroyed, the wire and the wire break simultaneously, and the sewing strength can meet the standard requirements; when the stitch length is less than 6mm, the sewing strength is easy to guarantee, but the thread amount is obvious. The increase will increase the cost. If the needle pitch is too small, the flat yarn of the woven bag will inevitably be damaged, and the sewing strength will decrease as the outside distance decreases.
Impact on drop test
Due to the small needle distance and the sewing of double lanes, the sewing machines for civilian use make the flat silk fibers more damaged, and the impact resistance of the flats is reduced when the sewing machine is dropped. The rate of broken bags is high. Industrial sewing machine sewing flat fiber is less damaged, and due to the thick line, the impact of the sewing site when the drop is higher, the rate of broken package is reduced.
In addition, sewing thread thickness also has a great influence on the sewing strength. The force of the thick line on the flat yarn is decomposed on a long circular arc line. The splitting ability of the flat yarn is weak, and the sewing strength is high; the force of the thin line on the flat yarn acts relatively at a certain point, and therefore The flat silk has a strong splitting ability and the sewing strength is low.
In summary, when the production enterprise is producing, it should use the industrial sewing machine to sew the sewing process. The stitch distance should be moderate and the line thickness should be appropriate. The sewing strength of the woven bag can be improved, and it is not easy to break the package when it is dropped.
Standing Garment Steamer,Standing Clothes Steamer,Best Standing Steamer,Standing Steamer For Clothes
NINGBO ZHONGJIA ELECTRICAL APPLIANCE CO., LTD. , https://www.foodzhongjia.com