JPS62106702A - Upper material for shoes - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a shoe cover material, and more particularly to a shoe cover material that is soft to the touch and has excellent breathability.

(Prior art) Laminated shoe coverings that use fabric as the surface material of shoe coverings generally use a cloth material with a relatively dense texture as the outer fabric,
As the backing material, a cloth material with a relatively coarse m-weave, a thin sheet of flexible polyurethane foam, etc. are used.

Conventionally, when bonding such materials together, the following methods were used: ■ Method using solvent rubber glue ■ Method using latex adhesive ■ Method using solvent-based urethane resin glue ■ Method using liquid diene polymer and polyisocyanate This has been done using methods such as using the entire glue as the main ingredient.

(Problems to be Solved by the Invention) However, with such conventional techniques, problems have arisen in terms of production and physical properties as a material for covering.

First, the problem that ■, ■, and ■ have in common is the lack of breathability. When these glues are applied, they form a film and have almost no ventilation. Regarding individual glues, in terms of texture, the mixture is good due to the rubber raw material, but there is a risk of environmental pollution and fire due to the use of solvents.
Furthermore, the solvent used is a waste of resources due to the final volatilization, and the physical properties of the covering material include poor water-resistant adhesion.

The latex rubber glue (■) has basically the same properties as the solvent rubber paste (■), and the resulting texture is also the same, but it requires a large amount of energy to evaporate water, and the ammonia in the latex is environmentally friendly. There were problems in terms of contamination, and in terms of physical properties, there were problems with water-resistant adhesion.

In the method using solvent-based urethane resin glue,
Unlike solvent rubber glue or latex rubber glue, it is difficult to impart thixotropic viscosity, so there are drawbacks such as strong seepage into the coating substrate and hard texture. It had the same drawbacks as solvent rubber glue, such as the danger of pollution and fire, and the waste of resources as the solvent was ultimately volatilized.

In the method of ■, among the drawbacks of ■, ■, and ■ mentioned above,
Many of these methods are improved and eliminate the risk of environmental pollution and fire, require less energy during production, and have excellent water-resistant adhesive properties.

Furthermore, in terms of physical properties, it has particularly excellent air permeability, which is an excellent point that cannot be achieved with conventional glue. However, in terms of texture, the molecular weight of the liquid diene polymer is low, on the order of several thousand, so initial aggregation is difficult. The strength of the coating is weak, and therefore it has the disadvantage that it inevitably bleeds into the coated substrate, resulting in a hard texture.

As an improvement method for this, the inventors applied a sheet-like base material that had a 100% tensile modulus of 50 to 9 before applying a laminating adhesive that was made entirely of a liquid diene polymer and a polyisocyanate.
/- We have proposed a method of softening the texture by applying the following elastomer in advance.

However, even though this improved method improved the feel, it could not be said to be a complete improvement method because air permeability could not be obtained as long as the Nidistomer was applied with a conventional knife coat or the like.

The present invention solves these conventional drawbacks and provides a shoe cover material that is soft to the touch and has excellent breathability.

(Means for solving the problem) The shoe covering material of the present invention is made by laminating a sheet-like front base material and a sheet-like back base material with a laminated glue containing a liquid diene polymer and polyisocyanate e as main components. At the time of lamination, 5 or more meshes of nidistomer having a 100% tensile modulus of 50 kg/i or less are applied to the sheet-like base material on the side to which the laminating glue is applied.
0 Metsushi + [All features are that it must be applied in advance with a lower knob roll.

As the sheet-like front base material and the sheet-like back base material in the present invention, conventional laminated materials of this kind can be used, such as natural fibers such as cotton and linen, recycled fibers such as rayon, etc. Examples include woven fabrics, nonwoven fabrics, and knitted fabrics using semi-synthetic fibers such as acetate, and synthetic fibers such as nylon and tetron. These base materials are treated with water and oil repellents as necessary.
There is no problem in performing all flame retardant treatments. In addition, in order to improve the emotional strength with the sole material, a layer made of, for example, urethane resin is placed on the opposite side of the sheet-like table base material from the pasting side.
It is a preferable embodiment to perform a treatment to improve surface adhesion by applying a liquid-type waxing agent or the like.Furthermore, a flexible polyurethane foam sheet can be used as the sheet-like top substrate, but A composite material having a thickness of about 1 to 5 ffiffi, which is made by fully laminating a foam sheet with a thinner knitted or woven fabric, is preferable from the viewpoint of maintaining strength (t').

This invention: The liquid diene polymer No. 10 has at least two active hydrogen groups in the molecule, has an average molecular weight of 400 to 10,000, exhibits fluidity at room temperature, and has a hydroxyl group at the end of one molecule. Polybutadiene, butadiene-inglen copolymer, acrylonitrile-butadiene copolymer, styrene-butadiene copolymer, etc., having a crosslinkable functional group such as , mercapto group, amino group, or carboxyl group, are used. These can be used early or in combination. Examples of polyisocyanates include biphenyl diisocyanate, inphorone diisocyanate,
Diphenylmethane diisocyanate, naphthalene diisocyanate, toluene diisocyanate, etc., as well as modified products, derivatives, and crude products thereof can be used. These polyisocyanates can be used alone or in combination.

This liquid diene polymer and polyisocyanate are mixed in consideration of the reaction equivalent ratio to form a laminating paste.

Normally, this mixing ratio is determined by the NC07OH ratio.
The range of H=lOO to 120/100 is preferable.

This laminating glue may contain fillers such as calcium carbonate, clay, talc, white carbon, aluminum hydroxide, urethanization catalysts such as organometallic soaps and organic amines, and further (= means antiseptic) as necessary. An oxidizing agent, an ultraviolet absorber, a coloring agent, an antistatic agent, a plasticizer, etc. can be selected and added as appropriate.Furthermore, if necessary, for dispersion of individual additives, a material that does not contain active hydrogen can be added. Organic solvents can be used.

In the present invention, the sheet-like front or back base material on the side to which the laminating glue is applied has a 100% tensile modulus of 50 to 9/cIIl or less, preferably 5 to 20 h/cr.
1 of elastomer is applied using a print roll of 5 or more meshes and 200 or less meshes.

Examples of this nidistomer include acrylic resins, urethane resins, rubbers, etc.R, which are bath-dissolved in an organic solvent and have a resin or rubber solid content of 5 to 70%.

It is a two-component type that adds a crosslinked polyisocyanate such as Coro$-TO” H% Desmodur R1 Desmodur RP, and has a 100% tensile modulus of 50 kg/-
The following can be used:

If the 100% tensile modulus is 50 Kp/I:171 or more, the texture becomes hard, which is not preferable. If these nidistomers are applied to a sheet-like base material in advance, it is applied with a 1-lint roll with a mesh size of 5 to 200 meshes, but the preferred mesh size is 10 to 100 meshes, which has good air permeability and a good texture. It's also soft. If the number of meshes in the print roll is less than 5 meshes, the printing points of the elastomer are too far apart and there is no effect of softening the texture, and if the number of meshes is larger than 200 meshes, the printing points of the elastomer are too close together, resulting in poor breathability. , none of them achieve the desired effect.

In order to apply the laminating glue whose main components are a parent liquid diene yarn polymer and polyisocyanate to a sheet-like substrate printed with the elastomer, it is common to apply it with a doctor knife, but it is also possible to apply it with a roll coater or spray. , hand coating V, or other coating means may be used.

(Effect) The uninvented shoe covering material has a 100% tensile modulus of 50 K in advance on the sheet-like base material on the side to which the lamination layer is applied.
By applying the following Nistomer with a print roll of 5 meshes or more and 200 meshes or less, the lamination glue is prevented from seeping into the sheet-like base material, and the texture is soft and there is a possibility of wrinkles. Since it is made of a single layer of mesh-like elastomer, a shoe covering material with excellent breathability can be obtained.

(Examples, Comparative Examples) Example: A 2/1 twill weave fabric made of Raycot fiber] Er-Soshita was used as the sheet-like backing material, and an acrylic resin treatment agent Crisco-1-1018 with a 100% tensile modulus of 5 to 9/- was used. (
Manufactured by Dainippon Ink)? 40jFwet/m by distribution below
All coating was carried out using a 25-mesh print roll with 11 dimensions of No. 2, and the coating was dried by heating at 100° C. for 1 minute.

Contains Nidistomer Parts by weight Criscort 1018 100 Coronate
L (Japanese Seven Urethane U") / Ison Tote)
2. Next, apply a laminating glue containing the following combination of diene type compound and polyisocyafluoro 1-t as the main ingredients to the side of the sheet-like backing material coated with Nistomer, with a basis weight of 250 mm/m'. Immediately, a 20/2 x 2-0 // plain weave 0 x 43 cotton fabric was laminated as a sheet-like outer fabric and continuously rolled up while heating and curing at 100°C for 3 minutes to obtain a laminated broken material. .

Lamination glue formulation weight part, 1
H'i no BD R-45HT @ 11' Nobuta ε no ni〉ku AROO ne U ζ J) 100 Charcoal Calcium (Light filled ax j)
100 Schif> Width Easy Nolaurate (Urethane Biu Kyoji Nagi M to E Anti) GO2 Booth Bin 32
8 (Tsune Tsugu and Bon ni Qi 1 -y7':'jJ Iggy Shaso) 05 Sexyl Phthalate (Kaguchi Ukisai)
30, the air permeability was good as shown in Table 3.

Comparative Example 1: A sheet-like back base material and a front base material similar to those in Example i were prepared, and natural rubber-based toluene-dissolved solvent-based rubber glue (solid content 50%) was applied to the sheet-like base material at a basis weight of 700 f/m. ', apply with 111
First, the front base material was laminated and continuously rolled up for 1 inch while heating and drying at 100°C for 1 minute, and then heated at 150°C x 4 in a vulcanizer.
While completing the entire vulcanization process, it is continuously rolled up (', f'
I got it.

The physical properties of the obtained coating material are as shown in the following. ), but although it had a soft texture, it had no breathability and was not a good cover material.

Ratio@da"d 2 When obtaining the entire cover material using the same sheet base material, nidistomer, and laminating glue as in the example, 40ywθt /
? ? ! A coating material was obtained in the same manner as in Example 2 except that the coating was applied with a basis weight of '. As for the physical properties of this product, as shown in Table 1, the feel was as good as in the examples, but the air permeability was hardly good and could not be said to be good.

Comparative Example 3 Using the same sheet base material as in Example, a lace cover material was obtained (-In this case, pre-coating with acrylic treatment agent I was not performed, but the same laminating glue as in Example was used to laminate the lace base material, A covering material was obtained.As shown in Table 2, the physical properties of this material were breathable, but the texture was hard and could not be said to be good.

Table - Note: The texture is 6 on the JIS L-1096 handle ometer.
11j feet. The smaller the number, the softer it is.

Air permeability was determined using a Frazier air permeability tester, examples,
As is clear from the comparative example, the only material that has a soft texture and excellent breathability is the material covered in this study.The conventional method does not have both texture and breathability, and has insufficient physical properties. It was something.

Claims (1)

[Claims] When laminating a sheet-like front base material and a sheet-like back base material with a laminating glue whose main components are a liquid diene polymer and a polyisocyanate, the sheet-like base material on the side to which the laminating glue is applied is 100% tensile modulus is 50Kg/cm^2
A shoe covering material characterized in that the following elastomer is applied in advance with a print roll of 5 mesh or more and 200 mesh or less.