SK9459Y1 - Sewing method of protection outfits made of non-woven textile fabric with stiches resistant against penetration of liquids, aerosols and microorganisms and the stiches - Google Patents

Abstract

The method of sewing protective sets made of nonwoven fabrics with seams resistant to the penetration of liquids, aerosols and microorganisms is carried out in such a way that the individual parts of protective sets made of nonwoven single- to multilayer textile made of polypropylene and / or polyethylene, where one layer is an antibacterial layer containing active silver. , are machine sewn with a needle with a needle thickness of 60/10 Nm to 70/10 Nm and a thread made of 100% polyester with a thread thickness of Nm 150 to 120. The needle with a needle thickness of 60/10 Nm to 70/10 Nm has a tip - R. Švíky the sewn-on individual parts of the components of the whole-body protective sets are machine-grafted with a size of 2 mm to 5 mm.

Description

SK 9459 Υ1

Field of technology

The technical solution relates to a method of sewing nonwoven materials, where there is a requirement that the seam-stitched joint be resistant to the penetration of liquids, aerosols and microorganisms, which is useful in the production of reusable protective components all-body and all-day protection from nonwovens antibacterial treatment, which is designed to protect people from infection with pathogenic microorganisms. However, it can also be used in the production of separating compartments, either fixed or with passages, stationary tent parts, sleeves for arms, legs, head, etc. The technical solution also concerns the seam itself - a stitched joint, which is resistant to the penetration of liquids, aerosols and possibly also microorganisms. Ultimately, it is a matter of protecting persons at higher risk of infection by pathogenic microorganisms, such as rescue teams, police and customs forces, medical personnel, biological collectors, shelters and persons who come into contact with the public in the performance of their duties. The technical solution belongs to the textile industry.

Prior art

At present, various methods are known for protecting humans, in particular against infection by pathogenic microorganisms. These are hygienic drapes and respirators, gloves, caps and leg warmers. In the state of the art, there are also solutions for whole-body protection, especially against small dust particles. These are light protective suits Tyvek, Microgard, Micromax designed for single use, especially in the chemical industry. One well-known representative of such protective suits is the Overal Z2 paint-tex plus. It is made with an innovative online technology, where a breathable filter membrane made by meltblown technology is placed between two layers of polypropylene. It is designed for industrial, renovation and remediation work. These protective suits are not suitable for the protection of medical staff in hospitals, emergency medical services and are not suitable for all-day wear as a so-called protective suit. A common disadvantage of stitched components of reusable all-body and all-day protection made of non-woven fabric, even with possible antibacterial treatment, is the fact that they are not resistant to penetration of liquids, aerosols and microorganisms at stapling points. it is sufficiently filled with thread. And the thread itself is absorbent. In particular, when sewing medical overalls, due to the fact that even thicker areas are grafted, thicker R80 / 12 needles are used. Similarly, in the overall sewing of ski overalls, due to the fact that even thicker areas are grafted, even thicker needles R90 / 14 are used.

The not yet fully explored issue of methods of human protection, especially against infection by pathogenic microorganisms, as well as a sufficiently unexplored sewing method evoked the current pandemic of coronavirus Covid-19 to design a sewing method that would lock the product without the need for decontamination. The result of this effort is a method of sewing protective sets of nonwoven fabrics with seams resistant to the penetration of liquids, aerosols and microorganisms and seams, which are described in this technical solution.

The essence of the technical solution

Shortcomings in the state of the art in the textile industry with a focus on personal protective and hygienic aids, especially against pathogenic microorganisms in health care, rescue services, police and customs services, in persons collecting biological material, compartment workers and persons who perform their service come into contact with the public solves the proposed solution of sewing protective sets made of non-woven fabrics with seams resistant to the penetration of liquids, aerosols and microorganisms as well as possible antibacterial treatment and the seams themselves as stitched joints according to the technical solution.

The essence of the solution lies in the fact that in the method of sewing protective sets made of non-woven fabrics with seams resistant to penetration of liquids, aerosols and microorganisms, individual parts of protective sets made of non-woven single-, double-, triple- to multi-ply fabric made of machine sew with a needle with a needle thickness of 60/10 Nm to 70/10 Nm and a thread made of 100% polyester with a thread thickness of Nm 150 to 120. It is advantageous if a needle with a point - R is used for sewing. In this sewing method, the seams of the sewn-on individual parts of the whole-body and all-day protective sets are machined in a size of 2 mm to 5 mm. Nonwoven fabrics are also machine-sewn in this way, in which one layer of nonwoven double, three- to multilayer polypropylene and / or polyethylene fabric is an antibacterial layer containing active silver. In this way, nonwovens with at least one surface treatment are also sewn by machine: lamination, latexing, penetration and rubberizing. In this way, nonwoven fabrics are machine sewn, with one layer

SK 9459 va1 in non-woven multilayer fabric made of polypropylene and / or polyethylene is heat-insulating or cooling. The method of sewing according to the technical solution is also related to machine sewing of non-woven fabrics of protective sets containing at least one of the components: all-body all-day protective overall with hood / collar, gloves, headgear, arm warmers, shoe covers, separating compartments, either fixed or with passages, stationary tent parts, bags, protective sleeves for bags, protective sleeves for luggage, flaps single and double to protect zippers, etc.

This method of sewing with seams resistant to the penetration of liquids, aerosols and microorganisms is preferably applicable to a full-body all-day protective coverall with a hood, in which the individual parts are sewn in a sequence of steps:

- stitching of the back, the back and the stitching of the 5 mm stitched seam,

- trouser back stitching, seat and stitching,

- stitching of the back and trousers at the waist,

- sewing of the rubber band into the inner belt seam,

- sewing raglan sleeves on the front part and stitching,

- sewing raglan sleeves on the back and stitching,

- sewing rubber bands, 2 cm wide, in sleeves with a tab,

- seat stitching in a sitting position,

- stitching of the sides of the front and back and stitching with the securing of the sleeves,

- sewing rubber bands, 2 cm wide, in the lower trouser part with a tab,

- hood stitching and grafting,

- sewing a circular part of the hood around the perimeter and grafting 2 mm,

- sewing the rubber band into the back of the hood,

- sewing of the underlay and the edges of the zipper parts of the hood,

- hood sewing into the neckband,

- sewing the right zipper with an overlap up to the top of the hood,

- sewing of the left zipper part with overlap of the underlay of the whole zipper with grafting on the upper part of the left front part,

- hemming of the hood opening on the face with edging rubber and securing at the edges and - stitching of the step part and grafting with securing of the trouser bottoms.

Also, the sewing method with seams resistant to the penetration of liquids, aerosols and microorganisms is advantageously applicable to a full-body all-over protective coverall with a collar, in which the individual parts are sewn in a sequence of steps:

- stitching of the back, back and seam stitching, - stitching of the back of the trousers, seat and stitching, - stitching of the back and leg part at the waist,

- sewing raglan sleeves on the front part and stitching,

- sewing raglan sleeves on the back and stitching,

- sewing rubber bands, 2 cm wide, in sleeves with tab - cuff,

- seat stitching in a sitting position,

- stitching of the sides of the front and back and stitching with the securing of the sleeves,

- sewing elastics, 2 cm wide, in the lower trouser part with a tab - cuffs, - sewing the collar around the perimeter of the hips and top and turning the collar on the cheeks, - sewing the collar into the neckband,

- sewing the right zipper part with overlap up to the top of the collar with sewing the underlay,

- sewing of the left zipper part with overlap of the underside of the whole zipper with stitching in the upper part of the right front part and seat, and

- stitching the step section and grafting on by securing the trouser bottoms.

In this way, sewing with seams resistant to the penetration of liquids, aerosols and microorganisms, it is also possible to sew additional components of all-body and all-day protective sets from non-woven fabrics with antibacterial treatment, such as: headgear, shoe covers, gloves or gloves. One layer is an antibacterial layer of polypropylene and / or polyethylene with an active silver content with a minimum content of 0.7% by weight. active silver, which may or may not be covered on both sides with non-woven fabric. It is preferred that the active silver content is 1.2% by weight. or more. The nonwoven fabric layer can be of the Meltblown type, which has excellent filtering and sorption properties. Antibacterial efficacy and, in general, efficacy against pathogenic microorganisms is achieved by the active ingredient - active silver, which acts only in the wet state, when it is active after wetting. Therefore, the captured particles - bacteria, viruses are either killed or paralyzed, when their strains do not multiply. Layers, whether marginal, middle

SK 9459 Υ1 or other nonwoven fabrics may, for example, be of the Spunbond type and are characterized by their mechanical properties, in particular strength.

In this sewing method, seams resistant to the penetration of liquids, aerosols and microorganisms are made in such a way that needle punches with a needle thickness of 60/10 Nm to 70/10 Nm in covered layers of nonwoven single-, double-, triple- to multi-layer fabric of polypropylene and / or polyethylene with an optional thermal insulation or cooling layer are tightly filled with a 100% polyester yarn with a yarn thickness of Nm 150 to 120.

The advantages of the solution of the method of sewing protective sets made of non - woven fabrics also with possible antibacterial treatment with seams resistant to penetration of liquids, aerosols and microorganisms and the stitched joint - seam according to the technical solution are obvious from its effects, which manifests itself externally. The effects and originality lie in a unique sewing method, the seams of which are resistant to the passage of pathogenic microorganisms, liquids and aerosols. The grafting contributes to the resistance to the passage of pathogenic microorganisms, liquids and aerosols, because two or more layers of stitched material are layered in the resulting suture and the resulting suture thickness is filled into the needle with a fuller thread. The combination of antistatic material with polyester yarn also contributes to the resistance to the passage of pathogenic microorganisms, liquids and aerosols. The special sewing technology and its declared as well as achieved final properties are protocolly confirmed by the Institute for Testing and Certification, a. s., in Zlín.

Examples of embodiments

The individual embodiments of the technical solution are presented for illustration and not as limitations of technical solutions. Those skilled in the art will find, or be able to ascertain using no more than routine experimentation, many equivalents to specific embodiments of the invention. Such equivalents will also fall within the scope of the protection claims.

Example 1

In this example of a specific embodiment of the technical solution, a method of sewing a whole - body and all - day protective coverall with a hood made of nonwoven fabrics with seams resistant to the penetration of liquids, aerosols and microorganisms and the resulting stitched joint - seams is described. The following parts were used for the whole-body and all-day protective overalls with a hood:

1. Front part two parts

2. Rear part, back part two parts

3. Back part, trouser part two parts

4. Raglan sleeves, two parts

5. Hood in two parts, side and top

6. Hood lining, two parts

7. Rubber for cuffs, sleeves and trousers - width 2 cm

8. Rubber band - width 1 cm

9. Rubber, hood ZD center - 0.4 mm and edging rubber around the perimeter of the hole - 2.5 cm

Specially modified breathable three-layer nonwovens with antibacterial treatment were used for the production of all-body and all-day protective overalls with a hood. Its middle layer of the Meltblown type is an antibacterial layer made of 100% polypropylene with a content of 1.2% by weight. of active silver, which is covered on both sides with a non-woven fabric of the Spunbond type.

A needle was used for the production of full-body and all-day protective overalls with a hood

- Type. GROZ BECERT - Nm 70/10

-DPx5

-135x5

- tip - R and thread - type. BELFIL - S

- Nm 120 Tex 27

- 100% polyester;

thereby producing seams resistant to the penetration of liquids, aerosols and microorganisms, made in such a way that needle punches with a needle thickness of 70/10 Nm in covered layers of nonwoven three-layer polypropylene fabric are tightly filled with 100% polyester thread with a thread thickness of Nm 120.

During the sewing of the whole-body and all-day protective overalls with a hood, the individual parts are sewn together in a sequence of steps:

- stitching of the back, the back and the stitching of the 5 mm stitched seam,

- trouser back stitching, seat and stitching,

- stitching of the back back and leg section at the waist,

SK 9459 Υ1

- grafting on the rubber band on the front side,

- sewing raglan sleeves on the front part and stitching,

- sewing raglan sleeves on the back and stitching,

- sewing rubber bands, 2 cm wide, in sleeves with a tab,

- seat stitching in a sitting position,

- stitching of the sides of the front and back and stitching with the securing of the sleeves,

- sewing rubber bands, 2 cm wide, in the lower trouser part with a tab,

- hood stitching and grafting,

- sewing a circular part of the hood around the perimeter and grafting 2 mm,

- sewing the rubber band into the back of the hood,

- sewing of the underlay and the edges of the zipper parts of the hood,

- hood sewing into the neckband,

- sewing the right zipper with an overlap up to the top of the hood,

- sewing of the left zipper part with overlap of the underlay of the whole zipper with grafting on the upper part of the left front part,

edging the hood opening on the face with edging rubber and securing at the edges, and

- stitching of the step section and grafting with securing of the trouser bottoms. In an alternative embodiment, a thermal insulation layer can also be introduced into the sewing.

Example 2

In this example of a specific embodiment of the technical solution, a method of sewing a whole-body and all-day protective overalls with a collar of nonwoven fabrics with seams resistant to the penetration of liquids, aerosols and microorganisms and a stitched joint is described. The following parts were used for the whole-body and all-day protective overalls with a collar:

1. Front part two parts

2. Rear part, back part two parts

3. Back part, trouser part two parts

4. Raglan sleeves, two parts

5. Standing collar

6. Cufflinks, 2 cm wide

7. Rubber band, 1 cm wide.

Specially modified breathable three-layer nonwovens with antibacterial treatment were used for the production of all-body and all-day protective overalls with a hood. Its middle layer of the Meltblown type is an antibacterial layer made of 100% polypropylene with a content of 0.9% by weight. of active silver, which is covered on both sides with a non-woven fabric of the Spunbond type, one layer being made of polyethylene.

A needle was used to produce a full-body and all-day protective overall with a collar

- Type. GROZ BECER - Nm 60/10

-DPx5

-135x5

- tip - R and thread - type. BELFIL - S

- Nm 150 Tex 27

- 100% polyester;

At the same time, seams resistant to the penetration of liquids, aerosols and microorganisms were formed, made in such a way that needle punches with a needle thickness of 60/10 Nm in covered layers of nonwoven three-layer polypropylene fabric are tightly filled with 100% polyester thread with Nm 150 thread thickness.

When sewing the whole body and all-day protective overalls with a collar, the individual parts are sewn together in a sequence of steps:

- back stitching, back and seam stitching,

- trouser back stitching, seat and stitching,

- stitching of the back, back and trousers at the waist,

- sewing the belt rubber band into the inner belt seam,

- grafting on the rubber band on the front side,

- sewing raglan sleeves on the front part and stitching,

- sewing raglan sleeves on the back and stitching,

- sewing rubber bands, 2 cm wide, in sleeves with tab - cuff,

- seat stitching in a sitting position,

- stitching of the sides of the front and back and stitching with the securing of the sleeves,

- sewing rubber bands, 2 cm wide, in the lower trouser part with a tab - cuffs,

- stitching the collar around the hips and top and turning the collar over on the cheeks,

SK 9459 Υ1

- sewing the collar into the neckband,

- sewing the right zipper part with overlap up to the top of the collar with sewing the underlay,

- sewing of the left zipper part with overlap of the underside of the whole zipper with stitching in the upper part of the right front part and seat, and

- stitching of the step section and grafting on by securing the trouser bottoms.

In an alternative embodiment, a cooling layer may also be introduced into the sewing.

Example 3

This example of a specific embodiment of the technical solution describes a method of sewing individual components of the protective set - full-body and all-day protective overalls, where the individual components are gloves, headgear, arm warmers, shoe covers, individual parts of non-woven three-layer polypropylene fabric with antibacterial filter layer containing active silver with seams resistant to penetration of liquids, aerosols and microorganisms are machine sewn with a needle - type. GROZ BECERT - Nm 60/10 -DPx5 -135x5 - tip - R and thread - typ. BELFIL - S

- Nm 150 Tex 27

- 100% polyester;

At the same time, seams resistant to the penetration of liquids, aerosols and microorganisms were formed, made in such a way that needle punches with a needle thickness of 60/10 Nm in covered layers of nonwoven bilayer fabric of polypropylene and polyethylene are tightly filled with 100% polyester thread with Nm 150 thread thickness. .

The nonwoven fabric used has surface treatments in alternatives: lamination, latexing, penetration and rubberizing.

Example 4

This example of a specific embodiment of the technical solution describes a method of sewing individual components of a protective set - such as dividing compartments with passages, tent parts, bags, protective sleeves for bags, protective sleeves for luggage, the individual parts of non-woven three-layer polypropylene fabric with antibacterial filter layer containing active silver with seams resistant to penetration of liquids, aerosols and microorganisms are machine sewn with a needle - type. GROZ BECERT - Nm 70/10 -DPx5 -135x5 - tip - R and thread - typ. BELFIL - S

- Nm 120 Tex 27

- 100% polyester;

thereby producing seams resistant to the penetration of liquids, aerosols and microorganisms, made in such a way that needle punches with a needle thickness of 70/10 Nm in covered layers of nonwoven three-layer polypropylene fabric are tightly filled with 100% polyester thread with a thread thickness of Nm 120.

The nonwoven fabric used has surface treatments in alternatives: lamination, latexing, penetration and rubberizing.

Example 5

In this example of a specific embodiment, the sewing method described in Examples 1 to 4 is described, with the difference that nonwoven products are sewn from a starting raw material mixture of polypropylene and polyethylene without active silver with seams resistant to the penetration of liquids or aerosols.

Industrial applicability

The method of sewing protective sets from non-woven fabrics with seams resistant to the penetration of liquids, aerosols and microorganisms and the seams according to this technical solution can be used in the textile industry.

Claims (13)

SK 9459 Υ1 PROTECTION REQUIREMENTS A method for sewing protective sets made of nonwoven fabrics with seams resistant to the penetration of liquids, aerosols and microorganisms, characterized in that the individual parts of the protective sets made of nonwoven single, double, triple to multilayer fabrics made of polypropylene and / or polyethylene are machined sew with a needle with a needle thickness of 60/10 Nm to 70/10 Nm and a 100% polyester thread with a thread thickness of Nm 150 to 120. Sewing method according to claim 1, characterized in that the needle with a needle thickness of 60/10 Nm to 70/10 Nm has a tip - R. The sewing method according to claim 1, characterized in that the seams of the sewn-on individual parts of the protective sets are machine-stitched in a size of 2 mm to 5 mm. The sewing method according to claim 1, characterized in that the nonwoven fabrics are machine sewn, wherein one layer of the nonwoven double, three- to multilayer polypropylene and / or polyethylene fabric is an antibacterial layer containing active silver. The sewing method according to claim 1, characterized in that nonwoven fabrics are machine stitched in which one layer of the nonwoven multilayer fabric of polypropylene and / or polyethylene is heat-insulating. The sewing method according to claim 1, characterized in that nonwoven fabrics are machine stitched in which one layer of the nonwoven multilayer fabric of polypropylene and / or polyethylene is coolant. The sewing method according to claim 1, characterized in that the nonwoven fabrics are machine sewn with at least one surface treatment: lamination, latexing, penetration and rubberizing. Sewing method according to at least one of Claims 1 to 7, characterized in that nonwoven fabrics of protective sets comprising at least one of the following components are machine-sewn together: shoe covers, separating compartments fixed or with passages, stationary tent parts, bags, protective covers for bags, protective covers for luggage. Sewing method according to at least one of Claims 1 to 7, characterized in that the individual parts of the all-body all-day protective coverall with a hood / collar are sewn in a sequence of steps: stitching the back part, the back part and the 5 mm stitched seam; trouser back stitching, seat and stitching; stitching of the back and trouser part in the waist; sewing the belt rubber band into the inner belt seam; grafting on the rubber band on the face side; sewing raglan sleeves on the front and stitching; sewing raglan sleeves on the back and stitching; sewing rubber bands, 2 cm wide, in sleeves with bookmark; stitching the front part in a sitting position; stitching the sides of the front and back and stitching to secure the sleeve bands; sewing rubber bands, 2 cm wide, in the lower trouser part with a tab; first hood / collar sewing operations; sewing the right zipper part with overlap up to the top of the hood; sewing the left zipper part with overlap of the underlay of the whole zipper with grafting on the upper part of the left front part; second hood / collar sewing operations. The sewing method according to claim 9, characterized in that the individual parts of the full-body all-day hooded overalls are sewn in a sequence of steps of the first additional hood sewing operations: stitching the back part of the hood and grafting; sewing a circular part of the hood around the perimeter and grafting 2 mm; sewing the rubber band into the back of the hood; sewing the underlay and the edges of the zipper parts of the hood; sewing the hood into the neckband, and by a sequence of steps of additional additional sewing operations of the hood: edging the hood hole on the face with edging rubber and securing at the edges; stitching of the step part and grafting with securing of the trouser bottoms. The sewing method according to claim 9, characterized in that the individual parts of the all-body all-day protective overalls with the collar are sewn in a sequence of steps of the first additional collar sewing operations: sewing the collar around the hips and top and turning the collar on the face; sewing the collar into the collar, and the second additional operation of sewing the collar consists in sewing the step section and grafting on by securing the trouser bottoms. 12. Seams resistant to the penetration of liquids, aerosols and microorganisms, characterized in that needle needles with a needle thickness of 60/10 Nm to 70/10 Nm in covered layers of nonwoven single- to multilayer polypropylene and / or polyethylene fabric are tight. filled with 100% polyester thread with a thread thickness of Nm 150 to 120. Liquid, aerosol and microorganism penetration resistant seams according to Claim 12, characterized in that needle needles with a needle thickness of 60/10 Nm to 70/10 Nm in covered layers of nonwoven single- to multilayer polypropylene fabric and / or polyethylene and the thermal insulation or cooling layer are tightly filled with a thread of 100% polyester with a thread thickness of Nm 150 to 120. End of document