The method of obtaining duplicate material

 

(57) Abstract:

Usage: garment and footwear industry. The essence of the invention: a method of obtaining a composite material designed to simplify and improve the environmental security technology for layered materials consisting of woven canvas and polymer films, by pre-forming the fleece of a mixture containing 10 to 100 wt.% thermoplastic fibers with a melting point component of 0.75 - 1.6 melting point of the inner layer of thermoplastic polymer, and a thermoplastic film in the form of paintings of unlimited length, the Assembly of a multilayer stack comprising at least one outer layer of nonwoven fiber fabric and an inner layer of thermoplastic polymer, hypoproteinemia multilayer stack on a punched equipment and heat treatment at a temperature of from 1.0 to 1.7 the melting temperature of the film of thermoplastic polymer 6 C.p. f-crystals, 1 table.

The invention relates to the field of processing technology of polymers, and more particularly to methods of producing a multilayer polymeric nonwoven materials in the form of paintings of unlimited length. The invention can find Primo receiving air and vapor permeable layered materials with a number of high protective, forming and operating properties.

A method of obtaining duplicate material - fibrous basis for artificial leather of the two fibrous, non-woven canvas. The method involves the preliminary formation of two non-woven canvases from a mixture of natural and synthetic fibers, blind sided perforation, the connection of the canvases in the package, additional end-to-end hypoproteinemia, latex impregnation and subsequent heat treatment for the purpose of vulcanization and removal of solvents (author. mon. USSR N 484701, class D 06 M 17/04, 1970). The disadvantages of the known method of producing duplicate material: low strength exfoliation, application of organic substances and the need to respect the protective measures in the process of their removal.

A method of obtaining composite material including a preliminary formation of fleece and a thermoplastic film in the form of paintings of unlimited length, the Assembly of a multilayer stack with a layer of a film of thermoplastic polymer in the package, hypoproteinemia package with firmware fiber cloths and heat treatment (C. B. Tikhomirov. Chemical technology of production of nonwovens. M: Light industry, 1971, sue and sufficient tensile strength.

Disadvantages of the method of producing a multilayer material: low resistance to delamination at the border of the film - nonwoven cloth.

The problem to which the present invention is directed, is to simplify and improve the environmental safety of the method, increasing the strength of the composite material on the delamination.

The technical result is achieved in that in the method of obtaining a composite material including a preliminary formation of fleece and a thermoplastic film in the form of paintings of unlimited length, the Assembly of a multilayer stack comprising at least one outer layer of nonwoven fiber fabric and an inner layer of thermoplastic polymer, perforating the layer of thermoplastic polymer by hypoproteinemia and heat treatment, according to the invention a pre-formed fibrous webs of a mixture containing at least 10 wt.% thermoplastic fibers with a melting point component of 0.75 - 1.6 melting point of the inner layer of thermoplastic polymer, and the perforation is carried out after the complete Assembly of the multilayer stack in conjunction with additional firmware fiber cloths n is knogo fiber, does not allow duplicate materials with sufficient strength to delamination. The use of thermoplastic fibers with a melting point component of less than 0.75 of the melting temperature of the inner layer of thermoplastic polymer, does not ensure the preservation of consumer properties of fibrous materials after heat treatment, due to complete melting and loss of form fibers. Use termoplastycznego fibers with a melting point component of more than 1.6 melting point of the inner layer of thermoplastic polymer, does not allow duplicate materials with sufficient strength and delamination.

The invention is illustrated in the examples.

Example 1. Get duplicated material made of polyester fibers, intended for the manufacture of parts of footwear. Pre-form two non-woven needle-punched canvas in the form of paintings of unlimited length, width 1900 mm and weighing 40 g/m3from a mixture of high-melting polyester (PE) and fusible thermoplastic polypropylene (PP) fibers. The share of low-melting thermoplastic polypropylene fibers in the mixture is 10 wt.%, temperature placenearest (LDPE). The melting point of the polyethylene 110oC. the melting point of the polypropylene contained in the form of fibers in the layers of woven canvas is 1,54 the melting temperature of polyethylene. Tubular film of polyethylene using a roller mechanism is placed between the two needle canvases with education inside the layered package of two layers of polyethylene with a total thickness of 100 μm. Multilayer package containing two fibrous outer and two inner film layer stacked on the conveyor belt, is fed into the zone hypoproteinemia on the unit type DRUM". Hypoproteinemia perform using piercing needles on both sides of the layered package at a depth of 7 mm on each side with speed, providing the density of the perforations 600 1/cm2.

When hypoproteinemia fibers of the outer layers extend through a perforated film and a link (stitch) the layers together. Stitched multi-layer package with perforated film layers are sent in the heat chamber and heated to 170oC, which is 1.5 melting point of the polyethylene for 3 minutes. The temperature in zones of the heat chamber is increased from 150 to 170oC. Layered package when heated undergoes shrinkage in the second adhesive and mechanical connection canvases fusion of polyethylene. Destroyed by perforation and shrinkage melting the inner layer provides the optimum combination of high air and vapor permeability strength (see table).

Example 2. Get duplicated material in example 1, but as one of the outer layers use artificial fur. Also use tubular film of polyethylene of a thickness of 60 μm, which is placed between the needle canvas and faux fur with education inside the layered package of two layers of polyethylene with a total thickness of 120 μm. Ipoprozhuk carry with one hand, from the side of the canvas to a depth of 8 mm with speed, providing education 200 holes on 1 cm2. Stitched multi-layer package with perforated film layers are sent in the heat chamber and heated to 180oC for 5 minutes, the Maximum temperature in the heat chamber is 1.64 melting point of the polyethylene. Material properties are given in table.

Example 3. Get duplicated material in example 1, but as one of the outer layers of the use of textile material - cloth, produced from a mixture of synthetic polyester fibers and natural fibers. The share of polyester fiber in SMEs canvas and to a depth of 5 mm from the side of the drape. The maximum temperature in the heat chamber is 1.7 the melting temperature of polyethylene. Material properties are given in table.

Example 4. Get duplicated material according to example 3, but as one of the outer layers use cotton. The maximum temperature in the heat chamber is 1.6 melting point of the polyethylene. Material properties are given in table.

Example 5. Get duplicated material in example 1, but as thermoplastic polymer for the manufacture of the film using a polyvinyl chloride (PVC). The melting point of polyvinyl chloride 189oC, which corresponds to the ratio of the melting temperature of polypropylene fibers and films of polyvinyl chloride 0.9. The maximum temperature in the heat chamber 225oC, which is 1.2 melting point of polyvinyl chloride. The resistance to delamination of composite material exceeds its tensile strength.

Example 6. Get duplicated material in example 1, but as thermoplastic polymer for the manufacture of the film using a high-pressure polyethylene with a high melt index. The melting point of polyethylene grades used 105oC. the temperature of the PLA is of polyethylene. The maximum temperature in the heat chamber 178,5oC, which is 1.7 the melting temperature of high-pressure polyethylene. The resistance to delamination of composite material exceeds its tensile strength.

Example 7. Get duplicated material in example 1, but as a thermoplastic film using the film-polycaproamide (PA). The melting point of the polyamide 226oC, which corresponds to the ratio of the melting temperature of polypropylene fibers and the polyamide film of 0.75. The maximum temperature in the heat chamber 226oC, which is 1.0 melting point is polycaproamide. The resistance to delamination of composite material exceeds its tensile strength.

1. A method of obtaining a composite material including a preliminary formation of fleece and a thermoplastic film in the form of paintings of unlimited length, the Assembly of a multilayer stack with a layer of a film of thermoplastic polymer in the package, hypoproteinemia package with firmware fiber cloths and heat treatment, characterized in that for forming fiber fabric used thermoplastic fiber with a melting point component of 0.75 to 1.6 tempera is 0 wt.% thermoplastic fibers with a melting point, part of 0.75 to 1.6 melting point of the inner layer film of thermoplastic polymer, and a heat treatment is carried out at a temperature of 1.0 - 1.7 melting temperature of the film of thermoplastic material.

2. A method of obtaining a composite material under item 1, characterized in that hypoproteinemia perform to the density of holes 200 - 800 1/cm2.

3. The method of obtaining duplicate material on PP.1 and 2, characterized in that when flashing fiber cloths depth of the perforation is 5 to 8 mm.

4. A method of obtaining a composite material under item 1, characterized in that as one of the layers additionally use artificial fur and/or the textile fabric from a blend of synthetic and natural fibers: cotton, satin, cloth, silk, velour, Jersey.

5. A method of obtaining a composite material under item 1, characterized in that an inner layer of thermoplastic polymer used films of polyolefins.

6. A method of obtaining a composite material under item 1, characterized in that a mixture of polyester and polypropylene fibers.

7. The method of obtaining duplicate material on p. 1, wherein t is

 

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