sewing thread - this is an extended, thin, evenly twisted yarn or thread with special properties that allow it to be used when sewing. Sewing threads are the main material for fastening clothing items made of fabrics, knitted and non-woven fabrics, fur, leather, etc.
At work the thread is subjected to repeated stretching and bending, friction and abrasion (for example, on the eye of the needle and on the material to be joined, etc.). These effects partially violate the integrity of the thread and reduce its strength.

When using the finished product the thread in the seam is also subjected to various influences - insignificant in size, but repeated stretching and bending; friction impact detergents at washing and chemical preparations at a dry-cleaner; high temperatures and pressure when ironing. These effects also destroy the threads in the seams.
In other words, the features of the sewing technology and the operating conditions of the finished products dictate certain quality requirements for the sewing threads chosen for sewing.

Particularly stringent requirements are imposed on their strength, which depends on the quality of the original yarn, the fibrous composition of the threads, their additional finishing, etc. (see below " Properties and structure of sewing threads ").
The quality of sewing threads is regulated by standards, which indicate the performance standards for the most important characteristics.

Requirements for the quality of sewing threads

Sewing threads must have:
- high tensile strength and sufficient elasticity (to reduce breakage on sewing machines ah and ensuring the necessary strength of the seam during the operation of products);
- be uniform in thickness (also for uniform tension in the sewing machine and the formation of a high-quality seam);
- have a high color fastness to the action of light weather, dry cleaning, washing;
- be heat-resistant (to prevent breakage from melting synthetic threads or overheating of natural and artificial threads, etc.).

The properties and structure of sewing threads are determined by:

fibrous composition;
. the number of additions;
. twist direction;
. thick;
. final finishing.

Let's take a closer look...

By fiber composition sewing threads are divided into natural (cotton, silk, linen); chemical (polyester, polyamide, viscose); combined from various fibers (see below section " ").

According to the number of additions, the threads are single-twisted in 2 or 3 additions and double-twisted in 4, 6, 9 or 12 additions.
- Single-twisted threads are obtained by twisting 2 or 3 original individual threads. Hence their name - single-twisted in 2 or 3 additions (see Figure 1 below " The structure of sewing threads ").

To obtain two-twist threads, the original threads are first twisted into 2 or 3 additions. Then the resulting single-twisted semi-finished products are twisted together again finally. Depending on the number of initial components at the first and second stages of twisting, these threads are called double-twisted in 4, 6, 9 or 12 additions.

Important!

For sewing, the use of double-twisted threads is more preferable, since, due to the additional fixation of the fibers during twisting, they acquire greater strength, better resist abrasion, and this reduces the breakage of the threads when sewing the product, and the stitching is smoother. Increasing the number of plies also increases the strength of the threads.

Picture 1. Structure of sewing threads.

In the direction of twist threads are right (Z) and left (S) final twist. It is preferable to use right-handed threads, as they have less breakage in sewing machines than left-handed threads.

Important!

The direction of the twist of the threads can be determined in this way: unwind a piece of thread with your right hand between your thumb and forefinger in a clockwise direction. If the thread is additionally twisted, then it has a twist (S), and if it unwinds, it has a twist (Z)

Thickness sewing threads are also very diverse. The thickness of sewing threads is characterized by a trade (conditional) number or linear density (tex). For threads of different fibrous composition, there is a trade numbering. For example, cotton threads have trade numbers 10, 20, 30, 40, and so on; natural silk threads - 18, 33, 65; lavsan threads - 22 L, 33 L, 55 L, etc.; kapron threads - 50 K.

At the same time, it is important to know: for threads made from natural fibers (cotton, natural silk) - the larger the number, the thinner they are. For synthetic threads, on the contrary, thinner threads have lower numbers.
And one more thing: If the thickness of the threads is the same, it is recommended to pay attention to the number of additions - the more threads are twisted, the better the threads.

By type of finish threads can be harsh, matte, glossy, white, colored, black. Bleaching and dyeing reduce the strength of threads. Glossy threads are stronger than matte ones.

Recommendations for using sewing threads
1. Regardless of whether you sew by hand or on a machine, different threads are used for each type of work (for basting, for seaming, for finishing a product with decorative seams, etc.). In each case, they must be selected individually, taking into account the required strength of the seams and their purpose. General recommendations for the use of various sewing threads are given in Table 2 " Appointment of sewing threads " (see below).
2. To obtain high-quality stitches when sewing products, it is necessary to choose the right threads, take into account their fibrous composition and thickness.
The correct choice of thread depends, first of all, on the fabric - its thickness and composition. For example, when sewing thick materials, use thicker threads; when sewing thin materials, use thinner threads. The raw material composition of the threads must also be similar or similar to the composition of the fabric, since the requirements for the care of the selected threads and the fabric itself must be consistent. The thickness of the sewing thread, in turn, serves as the basis for choosing a sewing needle of the desired diameter: the thicker the thread, the larger the needle should be.
And further:
- The threads used for sewing products must match the color of the material or be combined with it.
- The threads on the spool always look darker than on the fabric. Therefore, in order to correctly determine their color, it is recommended to choose threads slightly darker than the color of the fabric.
- Instead of cotton threads, it is allowed to use threads made of chemical and fibers of the same thickness.

Recommendations for the interchangeability of sewing threads of various compositions are given in Table 3 " Interchangeability of sewing threads " (see below). The correspondence is based on their thickness (linear density).

Table 2 "Purpose of sewing threads"

Table 3 "Interchangeability of sewing threads"

Characteristics of sewing threads by raw material composition
There should be a lot of threads when sewing - in a large assortment and with a wide choice of colors. When choosing threads, attention should be paid to their thickness and composition.

Important!

For each type of work, as well as depending on the characteristics of the material, the threads must be selected individually - there are no "UNIVERSAL" sewing threads. As a rule, the basis for right choice threads, first of all, is their raw material composition. And one more thing: threads of different composition with the same numbers will not be the same in thickness, which must be taken into account when choosing threads.

Raw composition of threads
Sewing threads are made from natural and chemical fibers and threads.

Cotton threads (cotton)
They are used in the manufacture of almost any type of garment, and natural raw materials make these threads indispensable in the production of clothing for children.

According to the method of finishing, cotton threads are produced in matte and glossy versions, harsh and treated with special compounds, different in color. The most expensive option by far are mercerized cotton threads.

Depending on the thickness, sewing threads are assigned trade numbers. The trade number is a conditional number of threads that characterizes their thickness. As a rule, the higher the number, the thinner the threads.

Cotton threads produce the following trade numbers: 10, 20, 30, 40, 50, 60, 80, 100.

The use of threads depends on their thickness. For example, threads No. 80 and No. 100 are the thinnest, so they are used for sewing products from the thinnest fabrics, and threads No. 30 and No. 40, respectively, are suitable for products made of denser and thicker fabrics (see Table 1 from the section " Tools and fixtures for handmade. Hand sewing needles ").

When performing manual work (for example, basting parts), it is recommended to use thin (No. 60-80) cotton threads.

By strength, cotton threads are divided into trade marks "Prima", "Extra", "Special", "Especially strong". Prima brand threads are the least durable. Threads trademark"Especially durable" is used for the manufacture of workwear.

Silk threads (sewing silk)

Due to insufficient strength, the assortment of silk threads is currently quite limited (displaced by chemical analogues). Silk threads are mainly used for finishing work and machine embroidery.

By thickness, natural silk is divided into

thin No. 65,

medium number 33,

thickened No. 13, No. 18.

Thread No. 65 is used for joining and overcasting details from thin fabrics (for example, organza, chiffon, etc.);

for finishing stitches on medium-thick fabrics, No. 33 is suitable; No. 18

and 13 for machine buttonholes, sewing on buttons and finishing stitches on woolen fabrics.

Linen threads

Intended for the manufacture of products technical purpose and household consumption, such as tarpaulin products; tailoring of footwear (in saddlery production), in the manufacture of lace.

Viscose threads

In appearance, they are similar to natural silk threads. A feature of viscose threads is the decrease in wet strength. Therefore, in the clothing industry they are used in limited quantities, mainly for embroidery.

Synthetic threads

Synthetic threads are produced from polyester (lavsan) and polyamide (kapron) fibers and threads both in pure form and in blends. Such threads have high strength and low shrinkage.

Important!

For synthetic threads, their conditional numbers are commensurate with their linear density (thickness).

By production method synthetic threads are divided into complex, reinforced (combined), textured (volumetric, elastic), monofilament, etc.

Complex synthetic threads in appearance they resemble threads made of natural silk.
. Complex nylon threads have high strength and abrasion resistance surpass all other threads, so they are widely used for buttonholes, as well as in the manufacture of clothing from durable non-shrink materials. They have a conventional trade designation of 50K.

The heat resistance of the threads is low, therefore, the wet-heat treatment of products made using nylon threads should be carried out through a moistened ironing iron at a temperature of 160-165 ° C and for no more than 30 s.

. Complex lavsan threads are also non-shrinking, but inferior to kapron in strength and abrasion resistance, however, they surpass them in heat resistance. Trade numbers: 22L, ZZL, 55L, 90L. Thin threads 22L, ZZL are used for the manufacture of underwear, shirts and costume and dress products, and thick threads 55L, 90L are used for embossed finishing stitches.
Lavsan and kapron threads withstand short-term heating up to a temperature of 240-270°C.

Important!

Sewing threads made from multifilament threads are characterized by a small thickness with a significant breaking load. Therefore, it is possible to use complex threads with a thickness equal to the thickness of commonly used cotton threads, but get a much stronger seam.

Textured sewing thread (elastic)

Currently, the most widely used polyester textured thread (PT), which is a three-dimensional thread with loops on the surface.

Textured sewing threads are used for overcasting the edges of parts, as well as in the manufacture of garments from elastic knitted fabrics. They provide strong, stretchable seams with good covering, which is also important when sewing products from easily fraying fabrics. Symbol thread - 18 LT, 24 LT, 37 LT, etc.

Reinforced sewing thread

They are produced by connecting a core of polyester (lavsan) complex thread and a braid of cotton (LH), polyester (LL) or siblon (LS) fiber.

Due to their combined properties, reinforced threads are universal, they are used in the clothing, knitwear, footwear, leather goods industry for stitching parts, overcasting cuts and finishing stitches.

.
. Reinforced cotton-lavsan sewing threads 36 LH, 36 LH-1, 35 LL are suitable for sewing products from thin and medium thickness fabrics, knitted fabrics; 44 LH, 44 LH-1 and 65LH, 65 LH-1 are recommended to be used instead of cotton threads of trade numbers No. 30 and 40. The threads have high strength, heat resistance, elasticity and wear resistance, as well as slight shrinkage. They are resistant to dry cleaning and washing.
.Reinforced lavsan threads with a braid of lavsan fibers also provide thread seams with the necessary indicators of strength and wear resistance. Threads with the number 35LL are used for sewing products from thinner fabrics, knitwear; 45 LL, 70 LL, etc., respectively, are suitable for denser and heavier fabrics.

monofilament

An interesting and promising range of transparent threads. They can be colorless for processing light-colored materials and pigmented (tinted in gray, brown) - for dark tones.

The initial raw material for their production is polyamide (kapron or nylon), which has high elastic properties, high resistance to abrasion and transparency.

Treated with special optical preparations, they are able to acquire the color of the processed material. Therefore, when sewing fabrics of different colors, the need for frequent refilling of sewing machines is eliminated. They are produced under the numbers 7KMP, 13KMP and 20KMP. Transparent threads are recommended for sewing shirts made of polyamide fabric, women's blouses and knitted dresses in medium and light colors.

Staple synthetic threads (LSh)

In structure and appearance, they are close to cotton, but they are distinguished by greater strength, less shrinkage. They are softer than complex ones and more resistant to high temperatures.

Staple thread is universal in use: 27 LSH - used for sewing thin linen, dress, silk and shirt fabrics; 40 LSH - fabrics of medium surface density; 80 LSH - leather goods.

All of the above types of threads are by no means a complete list of threads used in the sewing industry today, their range is much richer and more diverse.

On this page we will get acquainted with the main characteristics of sewing threads.
sewing thread- this is an extended, thin, evenly twisted yarn or thread with special properties that allow it to be used when sewing. Sewing threads are the main material for fastening clothing items made of fabrics, knitted and non-woven fabrics, fur, leather, etc.
At work the thread is subjected to repeated stretching and bending, friction and abrasion (for example, on the eye of the needle and on the material to be joined, etc.). These effects partially violate the integrity of the thread and reduce its strength.
When using the finished product the thread in the seam is also subjected to various influences - insignificant in size, but repeated stretching and bending; friction exposure to detergents during washing and chemicals during dry cleaning; high temperatures and pressure when ironing. These effects also destroy the threads in the seams.
In other words, the features of the sewing technology and the operating conditions of the finished products dictate certain quality requirements for the sewing threads chosen for sewing. Particularly stringent requirements are imposed on their strength, which depends on the quality of the original yarn, the fibrous composition of the threads, their additional finishing, etc. (see below "Properties and structure of sewing threads").
The quality of sewing threads is regulated by standards, which indicate the performance standards for the most important characteristics.

Requirements for the quality of sewing threads
Sewing threads must have:
- high tensile strength and sufficient elasticity (to reduce breakage on sewing machines and ensure the necessary strength of the seam during the operation of products);
- be uniform in thickness (also for uniform tension in the sewing machine and the formation of a high-quality seam);
- have a high color fastness to the action of light weather, dry cleaning, washing;
- be heat-resistant (to prevent breakage from melting synthetic threads or overheating of natural and artificial threads, etc.).

The properties and structure of sewing threads are determined by:
fibrous composition;
the number of additions;
twist direction;
thick;
final finishing.

Let's take a closer look...

By fiber composition sewing threads are divided into natural (cotton, silk, linen); chemical (polyester, polyamide, viscose); combined from various fibers (see the section below "Characteristics of sewing threads by raw material composition").
By number of additions threads are single-twisted in 2 or 3 additions and double-twisted in 4, 6, 9 or 12 additions.
- Single-twisted threads are obtained by twisting 2 or 3 original individual threads. Hence their name - single-twisted in 2 or 3 additions (see Figure 1 below "Structure of sewing threads").
- To obtain two-twist threads, the original threads are first twisted into 2 or 3 additions. Then the resulting single-twisted semi-finished products are twisted together again finally. Depending on the number of initial components in the first and second stages of twisting, these threads are called double-twisted in 4, 6, 9 or 12 additions.

Important! For sewing, the use of double-twisted threads is more preferable, since, due to the additional fixation of the fibers during twisting, they acquire greater strength, better resist abrasion, and this reduces the breakage of the threads when sewing the product, and the stitching is smoother. Increasing the number of plies also increases the strength of the threads.

Picture 1. The structure of sewing threads.

In the direction of twist threads are right (Z) and left (S) final twist. It is preferable to use right-handed threads, as they have less breakage in sewing machines than left-handed threads.

Important! The direction of twisting of the threads can be determined in this way: unwind a piece of thread with your right hand between your thumb and forefinger in a clockwise direction. If the thread is additionally twisted, then it has a twist (S), and if it unwinds, it has a twist (Z)

Thickness sewing threads are also very diverse. The thickness of sewing threads is characterized by a trade (conditional) number or linear density (tex). For threads of different fibrous composition, there is a trade numbering. For example, cotton threads have trade numbers 10, 20, 30, 40, and so on; natural silk threads - 18, 33, 65; lavsan threads - 22 L, 33 L, 55 L, etc.; kapron threads - 50 K.

At the same time, it is important to know: for threads made from natural fibers (cotton, natural silk) - the larger the number, the thinner they are. For synthetic threads, on the contrary, thinner threads have lower numbers.
And one more thing: If the thickness of the threads is the same, it is recommended to pay attention to the number of additions - the more threads are twisted, the better the threads.

By type of finish threads can be harsh, matte, glossy, white, colored, black. Bleaching and dyeing reduce the strength of threads. Glossy threads are stronger than matte ones.

Recommendations for using sewing threads
1. Regardless of whether you sew by hand or on a machine, different threads are used for each type of work (for basting, for seaming, for finishing a product with decorative seams, etc.). In each case, they must be selected individually, taking into account the required strength of the seams and their purpose. General recommendations for the use of various sewing threads are given in Table 2 "Purpose of sewing thread"(see below).
2. To obtain high-quality stitches when sewing products, it is necessary to choose the right threads, take into account their fibrous composition and thickness.
The correct choice of thread depends, first of all, on the fabric - its thickness and composition. For example, when sewing thick materials, use thicker threads; when sewing thin materials, use thinner threads. The raw material composition of the threads must also be similar or similar to the composition of the fabric, since the requirements for the care of the selected threads and the fabric itself must be consistent. The thickness of the sewing thread, in turn, serves as the basis for choosing a sewing needle of the desired diameter: the thicker the thread, the larger the needle should be.
And further:
- The threads used for sewing products must match the color of the material or be combined with it.
- The threads on the spool always look darker than on the fabric. Therefore, in order to correctly determine their color, it is recommended to choose threads slightly darker than the color of the fabric.
- Instead of cotton threads, it is allowed to use threads made of chemical and fibers of the same thickness.
Recommendations for the interchangeability of sewing threads of various compositions are given in Table 3 (see below). The correspondence is based on their thickness (linear density).

table 2 "Purpose of sewing thread"

Table 3 "Interchangeability of sewing threads"

Characteristics of sewing threads by raw material composition
There should be a lot of threads when sewing - in a large assortment and with a wide choice of colors. When choosing threads, attention should be paid to their thickness and composition.

Important! For each type of work, as well as depending on the characteristics of the material, the threads must be selected individually - there are no "UNIVERSAL" sewing threads. As a rule, the basis for the correct choice of threads, first of all, is their raw material composition. And one more thing: threads of different composition with the same numbers will not be the same in thickness, which must be taken into account when choosing threads.

Raw composition of threads
Sewing threads are made from natural and chemical fibers and threads.

Cotton threads (cotton)
They are used in the manufacture of almost any type of garment, and natural raw materials make these threads indispensable in the production of clothing for children.
According to the method of finishing, cotton threads are produced in matte and glossy versions, harsh and treated with special compounds, different in color. The most expensive option by far are mercerized cotton threads.
Depending on the thickness, sewing threads are assigned trade numbers. The trade number is a conditional number of threads that characterizes their thickness. As a rule, the higher the number, the thinner the threads.
Cotton threads produce the following trade numbers: 10, 20, 30, 40, 50, 60, 80, 100.
The use of threads depends on their thickness. For example, threads No. 80 and No. 100 are the thinnest, so they are used for sewing products from the thinnest fabrics, and threads No. 30 and No. 40, respectively, are suitable for products made of denser and thicker fabrics (see Table 1 from section "Tools and accessories for handicrafts. Manual sewing needles").
When performing manual work (for example, basting parts), it is recommended to use thin (No. 60-80) cotton threads.
By strength, cotton threads are divided into trade marks "Prima", "Extra", "Special", "Especially strong". Prima brand threads are the least durable. Threads of the brand "Especially durable" are used for the manufacture of overalls.

Silk threads (sewing silk)
Due to insufficient strength, the assortment of silk threads is currently quite limited (displaced by chemical analogues). Silk threads are mainly used for finishing work and machine embroidery.
By thickness, natural silk is divided into thin No. 65, medium No. 33, thickened No. 13, No. 18. Threads No. 65 are used to connect and overcast details from thin fabrics (for example, organza, chiffon, etc.); for finishing stitches on medium-thick fabrics, No. 33 is suitable; No. 18 and 13 - for machine buttonholes, sewing on buttons and for finishing stitches on woolen fabrics.

Linen threads
Intended for the manufacture of products for technical purposes and household consumption, such as tarpaulin products; tailoring of footwear (in saddlery production), in the manufacture of lace.

Viscose threads
In appearance, they are similar to natural silk threads. A feature of viscose threads is the decrease in wet strength. Therefore, in the clothing industry they are used in limited quantities, mainly for embroidery.

Synthetic threads
Synthetic threads are produced from polyester (lavsan) and polyamide (kapron) fibers and threads both in pure form and in blends. Such threads have high strength and low shrinkage.

Important! For synthetic threads, their conditional numbers are commensurate with their linear density (thickness).

By production method synthetic threads are divided into complex, reinforced (combined), textured (volumetric, elastic), monofilament, etc.
Complex synthetic threads in appearance they resemble threads made of natural silk.
Complex nylon threads have high strength and are superior to all other threads in terms of abrasion resistance, so they are widely used for buttonholes, as well as in the manufacture of clothes from durable non-shrink materials. They have a conventional trade designation of 50K. The heat resistance of the threads is low, therefore, the wet-heat treatment of products made using nylon threads should be carried out through a moistened ironing iron at a temperature of 160-165 ° C and for no more than 30 s.
Complex lavsan threads are also non-shrinking, but they are inferior to nylon threads in terms of strength and abrasion resistance, but they are superior in heat resistance. Trade numbers: 22L, ZZL, 55L, 90L. Thin threads 22L, ZZL are used for the manufacture of underwear, shirts and costume and dress products, and thick threads 55L, 90L are used for embossed finishing stitches.
Lavsan and kapron threads withstand short-term heating up to a temperature of 240-270°C.

Important! Sewing threads made from multifilament threads are characterized by a small thickness with a significant breaking load. Therefore, it is possible to use complex threads with a thickness equal to the thickness of commonly used cotton threads, but get a much stronger seam.

Textured sewing thread (elastic)
Currently, the most widely used polyester textured thread (PT), which is a three-dimensional thread with loops on the surface. Textured sewing threads are used for overcasting the edges of parts, as well as in the manufacture of garments from elastic knitted fabrics. They provide strong, stretchable seams with good covering, which is also important when sewing products from easily fraying fabrics. Symbol for threads - 18 LT, 24 LT, 37 LT, etc.

Reinforced sewing thread
They are produced by connecting a core of polyester (lavsan) complex thread and a braid of cotton (LH), polyester (LL) or siblon (LS) fiber. Due to their combined properties, reinforced threads are universal, they are used in the clothing, knitwear, footwear, leather goods industry for stitching parts, overcasting cuts and finishing stitches.
Reinforced cotton-lavsan sewing threads 36 LH, 36 LH-1, 35 LL are suitable for sewing products from thin and medium thickness fabrics, knitted fabrics; 44 LH, 44 LH-1 and 65LH, 65 LH-1 are recommended to be used instead of cotton threads of trade numbers No. 30 and 40. The threads have high strength, heat resistance, elasticity and wear resistance, as well as slight shrinkage. They are resistant to dry cleaning and washing.
Reinforced lavsan threads with a braid of lavsan fibers also provide thread seams with the necessary strength and wear resistance. Threads with the number 35LL are used for sewing products from thinner fabrics, knitwear; 45 LL, 70 LL, etc., respectively, are suitable for denser and heavier fabrics.

monofilament
An interesting and promising range of transparent threads. They can be colorless for processing light-colored materials and pigmented (tinted in gray, brown) - for dark tones. The initial raw material for their production is polyamide (kapron or nylon), which has high elastic properties, high resistance to abrasion and transparency. Treated with special optical preparations, they are able to acquire the color of the processed material. Therefore, when sewing fabrics of different colors, the need for frequent refilling of sewing machines is eliminated. They are produced under the numbers 7KMP, 13KMP and 20KMP. Transparent threads are recommended for sewing shirts made of polyamide fabric, women's blouses and knitted dresses in medium and light colors.

Staple synthetic threads (LSh)
In structure and appearance, they are close to cotton, but they are distinguished by greater strength, less shrinkage. They are softer than complex ones and more resistant to high temperatures. Staple thread is universal in use: 27 LSH - used for sewing thin linen, dress, silk and shirt fabrics; 40 LSH - fabrics of medium surface density; 80 LSH - leather goods.

All of the above types of threads are by no means a complete list of threads used in the sewing industry today, their range is much richer and more diverse.

Polyester threads lsh-210- this is a twisted product made of high-strength thin fibers, which is widely used in the textile industry, the production of soft containers, and the firmware of accounting documents. The material is lavsan staple fiber obtained from a polyethylene terephthalate melt by extrusion and air cooling.

What are the advantages of the LSh-210 thread

Lsh-210 threads are characterized by low weight and high breaking load. Products are soft, durable, elastic, resistant to abrasion, stretching, tearing. Advantages of staple lavsan threads:

• elasticity;
• biostability: not susceptible to the formation of fungus, mold;
• homogeneous structure;
• easy to use, easy to insert into the needle;
• do not require additional lubrication;
• well connected by knots;
• weather resistance: fibers are resistant to high humidity, temperature extremes, solar radiation;
• resistance to alkalis, acids, organic solvents.
• economical consumption;
• durability.

The material is environmentally friendly, complies with hygienic certificates and is used in the food industry.

What is the LSh-210 thread used for?

Bag sewing threads lsh-210 are used in the manufacture and sewing of packing bags made of natural fabrics, paper, craft, polypropylene. They sew the necks of bags for cereals, flour, sugar, tobacco and others. bulk products or non-food items. The threads form strong elastic seams that withstand multiple longitudinal and transverse tensions. Suitable for manual and stationary bag sewing machines. Thanks to its soft texture, the tare strings extend the life of the equipment.

Where else is LSh-210 used:

1. office area: filing books, multi-page archival, accounting documents (journals of accounting and registration of documents, contracts, cash books, personal files, forms strict accountability, statutes);
2. banking sector and cash collection: sealing and sealing with lead, plastic, rotary seals jewelry, cases and tubes for keys made of plastic or metal;
3. tailoring of awnings, tarpaulin products;
4. printing industry and polygraphy: bookbinding, stitching;
5. production of cargo, yacht ropes, cords, climbing ropes, halyards.

Reinforced lavsan thread with polyester or cotton braid is suitable for stitching furniture fabrics, artificial leather, workwear, carpets, car covers, sports equipment.

Where to buy thread LSH-210

We offer to buy polyester threads lsh-210 wholesale or retail at the maximum favorable prices. The PromTrust catalog contains white and colored sewing threads manufactured according to TU 8147-024-00319629-2000 | TU 8147-045-00319629. Product diameter 0.8 mm, breaking load 7 kgf.
Products are supplied in 1000m and 5000m cone bobbins, which are ideal for GK-9 portable bag sewing machines (LSh-210 1000 meters) and stationary machines (LSh-210 5000 meters). To calculate the required amount of thread, multiply the width of the bag by 3 and add about 10 cm. We deliver orders throughout Moscow and all of Russia.

Polyester mesh stitching thread made of staple lavsan. Manufactured from 100% polyester staple fiber. They have the ability to withstand multiple dynamic tension, provide strength and elasticity of the seams with longitudinal transverse stretching of the seam line.

Bag sewing threads

designed for sewing bags made of polypropylene, burlap, paper, as well as sewing products made of tarpaulin, awning fabrics.

The material of the tare thread has high strength, resistance to moisture, low temperatures and high dynamic loads. The LSh thread does not require special lubrication, and the soft texture increases the service life of the parts of bag stitching machines that come into contact with it.

LH thread, LL thread, reinforced cotton-dacron, reinforced polyester. They are made from a polyester complex thread and a braid of cotton (LH) or polyester (LL) fibers. Polyester reinforced threads LL are considered universal and provide high strength of the connection of parts, good appearance
and line elasticity. These threads are used for overcasting cuts, sewing details and finishing stitches.

In the production of products from thick and dense materials, for sewing shoes, leather goods, car covers, awnings and tents, technical products, upholstered furniture.

Reinforced threads- these are threads with a braid of polyester or cotton fiber and a continuous polyester complex thread. This combination gives maximum tensile strength, which ensures the use of these threads on high-speed sewing machines. Such threads are also characterized by high resistance to stretching and friction, which makes it possible to create a very strong and durable seam. Reinforced threads are used for sewing products High Quality where delicate stitching, high strength and no seam gathering are essential.

Reinforced threads with polyester braid (LL)

Marking LL (lavsan, lavsan) means that the thread consists of a lavsan core and a lavsan braid.

Composition of LL threads: 100% lavsan (polyester, polyester)

Reinforced threads (LL) are made from Polish, German complex polyester yarn and Korean staple polyester fiber and lavsan.

They have the right direction of the final twist.

The high strength of the threads is provided by a core of polyester complex yarn. The polyester staple fiber braid provides good sewing properties and reduces the risk of seam pulling during the sewing process.

During the rewinding process on the Jacob machine, the final finishing by immersion in a liquid composition with an organosilicon compound (KOS) improves the sewing properties of the threads, increases the elasticity and abrasion resistance of the threads, which improves the quality of the seam, increases heat resistance, reduces the electrification of the threads.

The quality control of semi-finished products is carried out on the Uster-Tester-3 device, which is a preventive control action during the start of technological process thread production. "Uster-Tester-3" also allows timely diagnostics of equipment. Quality control of finished threads is carried out on the device "Statimat-2".

Each reel is labeled with a color number.

Thermal properties of LL threads:

melting point 260◦С

<150 ◦С

linear shrinkage in boiling water 1.5% at 100°C

Chemical properties of LL threads:

humidity 1%

Threads have high strength, elasticity, wear resistance, slight shrinkage.

, , , , , ,

Documentation:

reinforced sewing threads, produced in accordance with GOST 6309 - 93 "Sewing threads, cotton and synthetic"

reinforced shoe threads are produced in accordance with GOST 30226 - 93 "Cotton and synthetic shoe threads"

shoe reinforced threads, produced according to TU 8147-028-00319629-2000 "Reinforced threads"

Reinforced threads with cotton braid (LH)

Marking LH (lavsan, cotton) means that the thread consists of a lavsan core and a cotton braid.

Composition of LH threads: 33% cotton + 67% polyester (polyester)

The threads have the right direction of the final twist

The high strength of the threads is provided by a core of polyester complex yarn. Cotton braid gives good hygienic and sewing properties, protects the threads from high temperatures during sewing and ironing.

During the rewinding process on the Jacob machine, the final finishing by immersion in a liquid composition with an organosilicon compound (KOS) improves the sewing properties of the threads, increases the uniformity, elasticity and abrasion resistance of the threads, which improves the quality of the seam, increases heat resistance, reduces the electrification of the threads.

Each reel is labeled with a color number.

Thermal properties of LH threads:

melting point 260◦С

iron bottom plate temperature<200 ◦С

linear shrinkage in boiling water 2% at 100◦С

Chemical properties of LH threads:

resistant to acid, alkali, organic solvents, bleaching, microorganisms and mold, chemical and wet washing

humidity 3%

Trade numbers issued by OAO PNK IM KIROVA: , , , ,