JP2514159B2 - Resin coated gloves - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a fiber glove as a raw material, and an emulsion resin, natural rubber latex, or synthetic rubber latex (hereinafter, The present invention relates to a resin-coated glove finished by applying a paste sol (hereinafter referred to as a vinyl chloride paste) of a resin other than vinyl chloride resin or vinyl chloride resin.

[0002]

2. Description of the Related Art Most of the original gloves are made of knitted fabric and are stretchable, that is, "giant", so that they are easy to put on the hand and do not give a resistance to the left while wearing. Latex and PVC paste are waterproof and slip-resistant (non-slip) to original gloves
However, in order to prevent the appearance and stretchability of the original glove from being impaired, it is necessary to apply a thin coat so as not to exude to the back side (inside when worn).

In this case, if the original gloves are made by cutting cloth and sewing, the thickness of the coating film is freely controlled by a roll coater or the like and latex or PVC paste is applied to the cloth without bleeding to the back side. There is also a method. However, in the case of so-called seamless original gloves knitted into a glove model by a knitting machine, this is attached to a molding hand mold, dipped in a latex or PVC paste layer and then lifted and applied (hereinafter, dip Method). In that case, it is not possible to mechanically control the degree of penetration of the latex or vinyl chloride paste and the thickness of the coating film, as in the case of coating with a roll coater or the like.

Of course, as a method of preventing the latex or PVC paste from seeping out in the dipping method, it is considered that the viscosity of the latex or the PVC paste is adjusted to be high and the degree of penetration thereof is suppressed. However, in that case, sufficient peeling strength cannot be obtained between the coating film and the original glove, and the coating film also becomes thick, so a flexible resin-coated glove cannot be obtained. On the other hand, when a latex or a vinyl chloride paste is prepared to have a low viscosity, the coating film can be thinned, but it exudes inside the original glove, which impairs the commercial value of the resin-coated glove. Therefore, in the dipping method, an important technical issue is how to apply a latex or a vinyl chloride paste prepared to have a low viscosity without bleeding inside.

In this regard, JP-A-57-2717 (Japanese Patent Publication No. 58-12361) and JP-A-2-104706 (Japanese Patent Publication No. 4-44063) impart an oil repellent agent to a raw glove, and the oil repellent action causes It is supposed that the PVC paste to be applied will not penetrate into the inside of the original glove and will not leak inside. In addition, JP-A-2-118102 (Japanese Patent Publication No. 7444/1992)
3) is to apply a coagulant such as acid or polyvalent metal salt to the original gloves,
The latex is applied to carry out sealing treatment, and then the vinyl chloride paste is applied, and the coating film of the latex that has been solidified first suppresses the internal permeation of the vinyl chloride paste. In addition, Japanese Patent Laid-Open No. 2-139401 (Japanese Patent Publication No. 4-44)
In 004), vinyl chloride resin powder is used in place of the vinyl chloride paste, which is sprinkled on the original gloves, and the vinyl chloride resin powder that has scattered is melted to form a vinyl chloride resin film on the surface of the original gloves. I am going to do it.

[0006]

As described above, various improvements have been made on the method of applying the vinyl chloride paste while suppressing the seepage to the back side of the original glove. However, while the vinyl chloride paste is oily, the latex is aqueous and is prepared to have a lower viscosity than the vinyl chloride paste.
These improved techniques for PVC paste cannot be applied when applying latex. Especially, since the surface of the original glove is not a little fluffy, the above second method,
That is, in the method of coagulating the latex to stop it, when the original gloves to which the coagulant is added are immersed in the latex,
At the moment of touching the original gloves, the latex coagulates and does not penetrate into the inside of the original gloves at all, and the latex coating film is easily peeled off. Further, in the above-mentioned third method, that is, the method of spraying and spraying the vinyl chloride resin powder, the vinyl chloride resin powder does not enter the inside of the original glove and is melted by the appearance of floating on the fluffed original glove surface. The film is easily peeled off and lacks durability.

By the way, the latex coating film has less temperature dependency than the vinyl chloride resin coating film and retains excellent elasticity even in severe cold conditions. Therefore, working gloves coated with latex are particularly suitable for working in refrigeration facilities. Although strongly demanded, there has not been obtained a flexible and flexible resin-coated glove in which latex is prepared to have a low viscosity and thinly applied, and which is easily stretched and fits easily in the hand.

[0008]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to obtain a resin-coated glove 15 in which latex is used instead of vinyl chloride resin and the latex is not exuded inside the original glove 11 and is applied thinly.

[0009]

[Concept of the Invention] Referring to the above-mentioned third method (Japanese Patent Laid-Open No. 2-139401) in which a vinyl chloride resin powder is sprinkled / sprayed, latex particles are enlarged without being gelated and made into a powder form and attached to an original glove. It is considered that the coating film is formed by gelling as it is.

By the way, the commonly used latex particles have a particle size of 0.1 to 0.05 μm, and the particle size can be changed by adjusting the addition amount of an emulsifier used during emulsion polymerization of latex. Further, it is known that after the emulsion polymerization, an electrolyte is added to the latex to weaken the dispersing power of the emulsifier and change the particle size of the latex particles.

For example, in JP-A-57-155272 (Japanese Patent Publication No. 59-3593), a styrene-butadiene copolymer latex having a particle size of 0.3 μm is added as a seed latex during emulsion polymerization of styrene, butadiene and acrylic acid. , A styrene / butadiene copolymer latex having a particle size of 2.7 μm is synthesized.

Further, Japanese Patent Laid-Open No. 61-336336 (Japanese Patent Publication No.
22174) and JP-A-60-23425 (Japanese Patent Publication No. 3-3).
4481), a cationic water-soluble polymer or a cationic surfactant is added to a mixed solution of an anionic or nonionic latex with an anionic water-soluble polymer under acidic conditions to induce coacervation, Particle size 30
A dispersion of coacervate particles containing a sol component of ˜40 μm is obtained, and when a latex or a surfactant is added to the dispersion, secondary coagulation of the coacervate particles disappears, and it is dehydrated and dried to remove asphalt modifiers and We manufacture latex powder suitable for injection molding raw materials.

In this case, the coacervate particles contain the sol component, float in the dispersion in a state capable of secondary aggregation, and dehydrate without adding latex or a surfactant as a secondary aggregation inhibitor to the coacervate particles. It is considered that the particles adhere to each other to form a film. Therefore, if the original glove is immersed in the dispersion liquid of the coacervate particles and lifted, the dispersion liquid adhering to the original glove absorbs part of the water content and evaporates, and the coacervate particles transfer the water as a medium. Dispersion balance is disturbed and secondary aggregation is promoted, and as a result, it adheres to the original gloves to form a coating film.

In that case, the coacervate particles are much larger than the ordinary latex particles and are less likely to penetrate into the inside of the original glove. Then, the secondary agglomeration starts in the process in which water is absorbed in the raw glove immersed in the dispersion liquid, and the coacervate particles are more difficult to penetrate into the raw glove. Thus, on the surface of the raw glove lifted from the dispersion liquid, it is considered that the coacervate particles do not seep inside the raw glove and enter between the fibers of the raw glove and gel while sticking and forming a coating film. It was

[0015]

The present invention has been completed on the basis of the above findings. In the resin-coated glove 15, the original glove 11 is attached to the molding hand mold 17, and the latex coacervate particles 13 are dispersed. Immerse in dispersion liquid 18 and lift up to coat coacervate particles 13 on the surface of original glove 11, then dip in latex and lift up to latex 1
4 and coated with coacervate particles 13 and latex 14
Is produced by gelling.

When the coacervate particles 13 are applied and then further dipped in the latex (14), the coacervate particles 13 are coarser than the latex particles (14), and innumerable gaps 16 are formed to coat the coacervate particles. The adhesive layer 12 does not serve as a waterproof layer, and the coacervate particles 13 have a relatively large degree of gelation on the surface thereof and have a poorer adhesive strength than the latex particles (14). This is to reinforce the coacervate particle coating layer 12 in terms of peel strength and the like.

Resin-coated gloves 1 thus obtained
In No. 5, a coating layer 12 of latex coacervate particles 13 is laminated on the surface of the original glove 11, and the coating layer 1
2 has a latex coating film 14 formed thereon, and the latex (14) of the latex coating film 14 exudes from the gaps 16 between the coacervate particles of the coating layer 12 and the original glove 1
1 adheres to the surface, thereby enhancing the delamination strength between the coacervate particle coating layer 12 and the thick glove 11.

For the coacervate particles 13 and the latex 14, it is preferable to use natural rubber, polyisoprene rubber, polychloroprene rubber or the like having high adhesiveness. The coacervate particle dispersion liquid 18 and the latex 14 are applied to the raw gloves by a dipping method in which the raw gloves are dipped and lifted in them, a spray method, a dropping method, a drip method (curtain flow), a brush coating method, or the like. Latex coating 1
The surface of No. 4 can be finished by applying a paint to color it, spraying a rubber powder to prevent slipping, or applying a vinyl chloride paste or electrostatic flocking.

[0019]

[Example] Natural rubber latex 10 having a resin content of 60%
0 parts by weight, 0.7 parts by weight of 25% aqueous ammonia solution, 0.9 parts by weight of vulcanizing agent (sulfur), 0.9 parts by weight of vulcanizing aid (zinc white), vulcanization accelerator (Ouchi Shinko Chemical Industry) Product name:
BZ) 0.45 parts by weight, vulcanization accelerator (Ouchi Shinko Chemical Industry Co., Ltd. product name: EZ) 0.45 parts by weight, antioxidant (Ouchi Shinko Chemical Industry Co., Ltd. product name: NS-30) 0 ．
Water was added to a latex mixed solution consisting of 6 parts by weight to prepare a latex mixed solution having a solid content of 45% by weight.

Next, this latex mixed solution was dropped into a 5% aqueous solution of sulfuric acid band to induce coacervation to prepare a dispersion 18 of coacervate particles 13 of natural rubber having a particle size of 50 to 500 μm. FIG. 3 shows the natural rubber coacervate particles 13 dispersed in the dispersion liquid 18.
It is a micrograph of.

Next, the original knitting gloves 11 for seamless knitting are attached to the molding hand mold 17, immersed in this dispersion 18 and lifted to fix the coacervate particles 13 on the surface of the original gloves 11.
The coating layer 12 was dried. FIG. 4 is a photomicrograph of the seamless knitting raw gloves 11 before the dipping, and FIG. 5 is a photomicrograph of the seamless knitting raw gloves 11 after the dipping.

Next, the coating layer 12 is attached to the molding hand mold 17 and is applied.
A layer of seamless knitted raw gloves 11 with a resin content of 6
100 parts by weight of 0% natural rubber latex, 1.2 parts by weight of 10% hydroxylated aqueous solution, 0.7 part by weight of vulcanizing agent (sulfur), 0.6 part by weight of vulcanizing aid (zinc white), vulcanizing Accelerator (Ouchi Shinko Chemical Industry Co., Ltd. product name: EZ) 0.7 parts by weight,
Anti-aging agent (Ouchi Shinko Chemical Co., Ltd. product name: NS-
30) A latex (14) having a viscosity of 250 cps was prepared by adding a thickener (product name: Toagosei Kagaku Kogyo KK, product name: A-20L) composed of 0.6 parts by weight and a pigment, and applied at 130 ° C. The resin-coated gloves 15 were made by vulcanization for 15 minutes.

The thickness of the coacervate particle coating layer 12 of the obtained resin-coated glove 15 is about 100 μm, and the coacervate particles 13 form a scaly shape sticking to the stitch of the original glove 11 and are aggregated and bonded. Was. The latex coating film 14 has a thickness of about 300 μm, and a part 14 of the latex coating film 14 has a gap 1 between the coacervate particles 1 and 13.
No. 6 exuded to the surface of the original glove 11 and was firmly bonded.

The peel strength between the latex coating film 14 and the original glove 11 was measured using a Shopper-type tensile strength tester according to JIS-K-6301. The result was 0.8 Kg / cm.
The above peel strength was confirmed. In this peel strength test, when a peel strength of about 0.8 kg / cm is recognized, the latex coating film 1 held by the jig of the tensile strength tester is
4 was cut without peeling from the original gloves 11 and the peel strength could not be measured. Therefore, the peel strength was 0.
Certified as 8 kg / cm or higher.

[0025]

According to the present invention, coacervate particles 1
3 is larger than the latex particles (14), does not penetrate into the inside 11 of the original glove, and forms the coating layer 12 on the surface of the original glove 11. In the coacervate particle coating layer 12, innumerable pinholes can be formed as the space 16 between particles, but since the coacervate particles 13 are of the same quality as the latex particles (14) and have a cohesive force, they are applied afterwards. The latex (14) aggregates and adheres to the coacervate particles 13 and the original glove 11 in the process of seeping from the gap 16 to the surface of the original glove 11, and the latex (14) permeates the original glove 11 and exudes to the inside thereof. There is no. Therefore, the present invention is advantageous when the resin-coated glove 15 is manufactured using the porous seamless knitted original glove 11 in which the latex 14 easily exudes.

In particular, the coacervate particles 13 at the time of adhering to the original glove 11 have an adhesive force of containing a sol component and secondarily aggregating, and therefore adhere to the original glove 11 and exude latex from the gap 16 ( 14) is the original gloves 11
Firmly adhere to. Therefore, according to the present invention, the interlaminar peel strength between the coacervate particle coating layer 12 and the original glove 11 and the intralayer peel strength in the coacervate particle coating layer 12 are reinforced by the latex (14), and the original glove 11 Resin-coated gloves with excellent peel strength between latex and latex coating film 1
5 is obtained.

Further, since the latex (14) is blocked by the coating layer 12 of the coacervate particles and the permeation into the inside 11 of the original glove is suppressed, the latex (14) can be prepared to have a low viscosity and used. The latex (14) thus prepared to have a low viscosity will form a thin coating film 14. Then, innumerable gaps 16 are formed in the coacervate particle coating layer 12, and as a result, they easily expand and contract. In this way, the latex coating film 14 can be made thin and highly stretchable, and the coacervate particle coating layer 12 has stretchability, so that a flexible and flexible resin-coated glove 15 that can be easily fitted to the hand when worn is obtained. To be

Further, the resin-coated gloves 15 according to the present invention
Is formed of rubber (12, 14) whose elasticity changes little with temperature changes and which has little temperature dependence, and is therefore convenient as a work glove in refrigeration facilities, cold regions, and the like. In the present invention, the reason why the coating of the coacervate particles 13 and the subsequent immersion in the latex (14) are to reinforce the coacervate particle coating layer 12 in terms of waterproofness, abrasion resistance, peel strength, etc., as described above. On the other hand, since the coacervate particle coating layer 12 prevents the latex (14) from seeping out, the present invention also applies to the case where the PVC paste is applied to the raw gloves 11 instead of the latex (14). It can be used.

[Brief description of drawings]

FIG. 1 is a front view of a process of manufacturing a resin-coated glove according to the present invention.

FIG. 2 is a partially enlarged sectional view of a resin-coated glove according to the present invention.

FIG. 3 is a photomicrograph of the structure of a natural rubber coacervate particle dispersed in a dispersion according to an example of the present invention.

FIG. 4 is a micrograph showing the shape of fibers on the surface of a seamless knitting raw glove before being immersed in a coacervate particle dispersion liquid according to an example of the present invention.

FIG. 5 is a micrograph of the fiber shape and the coacervate particle structure of the surface of the seamless knitted raw glove after being immersed in the coacervate particle dispersion liquid according to the example of the present invention.

[Explanation of symbols]

 11 Raw Gloves 12 Coacervate Particle Coating Layer 13 Coacervate Particles 14 Latex Coating Film 15 Resin Coated Gloves 16 Gap 17 Molding Hand Mold 18 Dispersion Liquid

Claims (3)

(57) [Claims] 1. The surface of the original glove 11 is laminated with a coating layer 12 of latex coacervate particles 13, and a latex coating film 14 is formed on the coating layer 12. Resin coated gloves. 2. The latex forming the coating film 14 according to claim 1 exudes from the gap 16 between the coacervate particles of the coating layer 12 to the surface of the raw glove 11. Item 1. The resin-coated gloves according to Item 1. 3. A dispersion 1 in which original gloves 11 are mounted on a molding hand mold 17 and latex coacervate particles 13 are dispersed.
8 onto the surface of the original glove 11 and coacervate particles 1
3. A method for producing resin-coated gloves, which comprises fixing the coating layer 12 of No. 3 and then applying latex on the coating layer 12 of the coacervate particles 13 to form a latex coating film 14.