RU10055U1 - WORK SHOES - Google Patents

Description

The claimed technical solution relates to the shoe industry, and more specifically to the manufacture of special work shoes intended for everyday use when working with radioactive substances in the second and third zones of enterprises.

Known special-purpose shoes with the adhesive method of fastening (TU 8831-007-05251557-96 were put into effect on 01.01.97 - OJSC Roslegprom - a copy is attached). The footwear is intended for everyday use when working with radioactive substances in the second and third zones of enterprises working with radioactive substances. The upper of the shoe is made of technical weave fabric, a two-layer twill made of synthetic staple fiber lavsan - TU 17 RSFSR 42-2038-86, treated to give a water resistance of at least 1,500 Pa at 140 mm Hg, with hydrophobic drugs, for example, a 5-m solution organosilicon emulsion K 3-42-20 according to TU 6-02-887-7V. Shoes withstand at least 20 decontamination cycles. The sole of the shoe (on the undercarriage of the bottom - with a corrugated convex surface of the sole and heel) is made of monolithic rubber of the brand. B-5 of the following composition: styrene-butadiene rubber, isoprene rubber, sulfur, mercaptobenzothiazole, diphenylguanvin, zinc oxide, industrial carbon, rubrax, liquid paraffin, paraffin, felted and drap.

Internal details of the upper: the back pocket and the set-in insole are made of upper material of the shoe, and the insole is made of half-woolen bikes and cardboard.

Intermediate details of the top: the toe cap and bump are made of vulcanized rubber-fiber mixture. To perform intermediate operations, for example, glueing parts for bending with glue, using work shoes

VK glue based on natural rubber is bonded.

For unloading and auxiliary fastening operations, NG grade glue based on chloroprene rubber was used; along the drawn edge line - adhesive No. 65 - 18-20% based on polyurethane polymer,

The strength of fixing the bottom of the shoe by vulcanization is 180-220 n / cm. The lower limit of the confidence interval for the coefficient of deactivation U after 4 cycles of pollution - decontamination is 48.

Having a number of advantages such as satisfactory functionality (protection of the foot), deactivability, at the same time, the disadvantages of the prototype include:

1. Low hygiene due to the use of stapled dacron fiber in the top fabric actively absorbing dirt.

2. The rapid loss of the initial appearance of the shoe during operation due to the formation of peeling (spools) on the textile upper of the shoe made of staple lavsan fiber, which also complicates the decontamination process.

3. The implementation of the sole of monolithic rubber with soot fillers leaves traces on the bright floor of the premises of the nuclear power plant.

4. Low-tech manufacturing of shoes by vulcanization. The technical result of the claimed solution is to eliminate

these shortcomings, namely, increasing operational properties: functionality by changing the design of shoes, hygienic properties while improving the appearance of shoes during operation, due to the additional use of complex lavsan fabric (29x2 tex) in the structure of the fabric, and improving the decontamination of shoes by using plastic compound based on suspension polyvinyl chloride for the bottom of the shoe and modification of the fabric of the upper shoe, while improving the manufacturability of shoe manufacturing th method.

The task is achieved in that work shoes with a top made of waterproof weave fabric are two-layer twill, with weft staple dacron fibers, on a lining, including berets connected on the front and back parts by sewing with polyester tape, in the upper part of the perimeter of which there is an adjustment tool in the cutouts the diameter of the foot girth in the form of an elastic shoe tape, shaped stitches are made on the berets, securing the lining and back, as well as a polymer sole with reflexion along the running gear, hn5 / trennye details of the upper part of the shoe - ksch) manic for the back and a set-in insole made of upper material, an insole made of bikes and cardboard, u) intermediate details of the upper part of the shoe - a rounded toe and back made of vulcanized rubber-fibrous mixture, a lining, characterized in that the upper , which also has a circular vamp, is made of 29x2 tex multilayer main yarns and lavsan weft staple weaves, two-layer twill with a surface density of 528-556 g / m and warp density - the number of threads per 10 cm 399-407, weft density - chi a strand of 10 cm 355-370, a thickness of 0.83-1.00 mm, berets made narrower in the upper part, and a monolithic sole with an elevated heel connected with the injection method and the top is made of plastic compound based on suspension polyvinyl chloride and plasticizers with the addition of thermal stabilizers , density 0.99-1.01 g / 6 ", Shore hardness 65-75 cu, melt flow at 170 ° C 12-20 g / 10 min, thermal stability at 185 ° 0 90-110 min, cut the soles are rounded, and recesses are made on the running surface in the heel and beam parts to reduce .. slipping and reducing the surface of contact with radioactive substances, as well as to improve the decontamination process, ending in the fore and heel parts with additional transverse corrugation.

Fig. I and 2 presents schematic solutions of working shoes,

FigL - appearance of work shoes;

figure 2 - work shoes in section,

where I is the circular vampire scribbled on. outer berets 2; 3 - inner tibia; 4 - elastic shoe tape located in the notches of berets 2; 5, 6 - inner lining for berets; 7 - pocket for backdrop 13 (figure 2); 8, 9 - polyester tape for sewing the front and rear seams connecting the berets; 10 - lining under a circular vamp; II - liner; 12 - a pad of felt or drap; 14 - a toe cap of the vulcanized rubber-fiber mixture; 15 - set-in insole made of upper material; 16 - an insole made of bikes and cardboard; 17 - a sole from plastic compound P1-2 based on suspension polyvinyl chloride; 18 - shaped line securing the lining 5, b and the back 13 on the berets 2.

Work shoes are made by the injection-molding method at the existing equipment park using a known sequence

technological operations. All edges of the details of the workpiece (circular vamp, berets), lining and set-in insole to prevent shedding of fibers are impregnated with glue based on polyurethane polymer. The top of the workpiece (berets, connected by seaming with a polyester tape at the front and rear seams, and a circular vamp) are processed by folding and reinforced with a hem. To each of the berets a double line in the upper teas is attached with a means of regulating the legs of the diameter of the leg coverage in the form of shoe elastic tape (TU 8I5I-023-003I9799-95, TU 17 RSFSR 21.2-236-4-91). To fasten the details of the top, lavsan threads according to OST 17-257-84, kapron threads according to OST 17-303-83, reinforced threads on ost 17-921-88 are used.

Lavsan fabric for upper shoes is treated to impart water-resistant properties (at least 1,500 PA at 140 mm water column) with hydrophobic preparations - a 5% solution of organosilicon emulsion to 3-42-20 according to TU 6-02-887-74, followed by drying at a temperature of 70-90 ° C for fixing on fabric.

The lavsan fabric is made by weaving a two-layer twill. As the main threads, lavsan multifilament threads 29x2 tex are used, as weft ones, dacron staple threads 72 tex are used. Surface density, g / m - 528-556 Thickness of fabric, mm - 0.83-1.00

Density, threads / 10 cm

based- 399-407

io duck- 355-370

Breaking load, N

based - 2500

duck - 1500

Elongation,%

at break: based - 100

duck 30

Abrasion resistance

revolutions - 2100 ± 40.

The use of the main multifilament yarns ensures that the upper of the shoe improves hygienic properties by reducing sorption of dirt on the surface of the fabric, reducing peeling, which ensures the appearance of the fabric during use and improves the decontamination of the shoe as a whole, while maintaining the quality of attaching the upper to the sole.

For dimensional stability of the shoe under the berets and the vamp, a lining of top material is sewn along the entire perimeter with a shaped stitch pumped by the fixation of the backdrop. The toe cap is glued and stitched to the toe and heel parts of the workpiece and in the pocket a back made of vulcanized rubber-fiber mixture.

livinylchlorozza with plasticizers having minimal volatility with good plasticizing ability, such as dibutyl phthalate, dioctyl phthalate, dibutyl sebacinate,

As thermostabilizers use tribasic lead sulfate, dibasic lead stearate. The composition of the polyvinyl chloride plastic compound also includes fillers. The plastic based on suspension polyvinyl chloride, mainly white, has sufficient sorption-desorption properties, ensuring minimal absorption of radioactive contaminants and good cleaning from them.

The plastic is obtained by rolling and subsequent calendering of a polymer mixture with a plasticizer and a heat stabilizer, as follows: 0 by a more advanced extrusion method onto screw machines through an annular or slot head. Melt flow at 170 ° C is 12-20 g / 10 min. The plastic sole has:

density 0.99-1.01

Shore hardness, conventional units 65-75;

thermal stability at 185 ° C 90-110 min.

The injection method of attaching the bottom of the shoe (molding and attaching) is carried out in 15-20 seconds. The average fastening strength of the bottom of the shoe is 400 N / cm (300-500); the edge of the sole has a rounded shape, and the running surface in the heel and tuft of the sole has recesses to reduce slipping and reduce the contact surface with radioactive substances, as well as facilitate the decontamination of shoes . In the fore and heel parts, an additional transverse corrugation of the surface is provided (to reduce slipping). An overestimated heel part of the sole improves flushing processes during decontamination, and together with the back gives the shoe form stability.

for industrial and urban special laundries for decontamination of work clothing and additional personal protective equipment L 1298-75.

After decontamination, the shoes for imparting water resistance are processed again with hydrophobic drugs.

1. Stability and deactivability assessment are carried out in accordance with GOST 27708-88. Nitric acid salts of radionuclides Gz, Yats are used as the polluting solution. , Cz,.

The coefficient of CD decontamination, measured by the ratio of the levels of radioactive contamination of shoe samples before and after decontamination, indicates how many times the contamination of materials has decreased after decontamination

prototype - 48

The declared decision is 57.

The remaining indicators of the eyes and its components were determined:

2. The strength of the seams of the workpieces - according to GOST 9290-76.

3. Strength of fastening of the bottom parts of the shoe - according to GOST 9292-82.

4. Water resistance and humidity of the material of the upper shoe - according to GOST 3816-81.

5. Linear dimensions and surface density - in accordance with GOST 29I04.I.

6. The number of threads per 10 cm - according to GOST 29104.3.

7. Breaking characteristics - according to GOST 29104.4-91.

8. Melt flow index PVC - according to GOST 11645-73.

9. Density - according to GOST 15139-69.

10. Hardness - according to GOST 263-75.

11. Thermal stability - according to GOST 14041-68 at a temperature of 175 and 185 ° C.

Claims (1)

Work shoes with a top made of waterproof double-layered twill weave with weft lavsan staple fibers on the lining, including berets connected on the front and back by sewing with polyester tape, in the upper part of the perimeter of each in the cutouts there is a means of adjusting the diameter of the leg circumference in the form of elastic shoe tape, on the berets made shaped stitches securing the lining and back, as well as a polymer sole with corrugation on the undercarriage, the inner details of the upper shoe - pocket for adnika and set-in insole from upper material, insert insole from bike and cardboard, intermediate details of the upper part of the shoe — a rounded toe and back made of vulcanized rubber-fiber mixture, a lining characterized in that the upper part of the shoe, which has an additional circular vault, is made of lavsan basic multifilament threads 29 x 2 tex from Dacron weft staple weaving threads "double layer twill" with a surface density of 528 - 556 g / m ² , the density on the basis - the number of threads / 10 cm - 399 - 407, the density on the weft - the number of threads / 10 cm - 355 - 370 thick fabrics 0.83 - 1.00 mm, berets made narrower in the upper part, and a monolithic sole with an elevated heel connected by injection method with the upper of the shoe is made of plastic based on suspension polyvinyl chloride and plasticizers with the addition of heat stabilizers, density 0.99 - 1, 01 g / cm ³ , Shore hardness 65 - 75 conventional units, melt flow at 170 ^o C 12 - 20 g / 10 min, thermal stability at 180 ^o C 90 - 110 min, the bottom edge is rounded, and along the running surface the soles in the heel and the tuft parts are made indentations, I finish in the fore and heel parts with additional transverse corrugation.