JP2909549B2 - Powder bonding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for uniformly bonding a functional powder to the surface of various substrates such as fibers, paper, and wood.

[Prior art] Conventionally, underwear, textiles such as sanitary goods, textiles such as non-woven fabrics, textile products such as non-woven fabrics, paper products such as wallpaper, base materials such as wood products such as flooring, pigments, antibacterial agents, As a method of bonding powder such as a deodorant and a far-infrared radiation agent, an acrylic or urethane resin to which an organic solvent has been added to have a low viscosity is used as an adhesive, which is then adhered and dried by printing or the like. Was.
In this method, since the organic solvent used is volatilized and the resin is crosslinked, it is difficult to make the resin uniform in terms of adhesive strength.

[Problems to be solved by the invention]

When bonding powder to a substrate such as the fiber, paper, and wood, in a method using a liquid adhesive containing an organic solvent, which has been conventionally performed, the substrate of the fiber, paper, and wood is In general, there are many products that are weak to high-temperature heating, and in many cases, cannot be operated in a state of being exposed to a high temperature for a long time. Therefore, if the treatment is carried out under the condition of low temperature as much as possible, the heating state during drying is difficult to be uniform due to the evaporation endothermic of the solvent and the like, so that the resin cross-linking is not uniform and the adhesive strength is not uniform. was there. Further, since the used organic solvent evaporates, a special device is required for exhausting the solvent, and the working environment cannot be said to be good.

[Means for solving the problem]

In view of the above problems, the present inventors have high working environment safety, and furthermore, the base material such as the fiber, paper, wood, etc., has a low temperature or a short heating time that does not cause the deterioration thereof. As a result of examining the method of adhering the powder to the various base materials in the above, it is a polymer coated with the powder, and,
After adhering the polymer component having a melting index of 20 or more at the softening temperature to the base material, heating the polymer at or above the softening temperature of the polymer to allow the powder to be uniformly bonded to the base material only by softening the polymer. And completed the present invention.

Referring to FIG. 1, a polymer 1 is first prepared. Next, the polymer 1 is coated with the powder 2. Next, the polymer 1 coated with the powder 2 is attached to the substrate 3 to which the powder is to be adhered. Thereafter, the polymer 1 is softened and the powder 2 is adhered to the substrate 3.

In this case, the surface of the base material such as the fiber, paper, and wood is generally rough, but the polymer 1 coated with the powder 2 has a rough surface even if the surface of the base material 3 is rough. , Respectively, adhere to the substrate 1 by the polymer 1 at each location where it is sprayed, without flowing, while maintaining the state of sprayed density of the polymer 1 respectively.

Any powder that can be applied in the present invention can be used as long as it does not deteriorate at the polymer softening temperature, but it is bonded to various substrates using a functional powder having antibacterial properties, deodorizing properties, and far-infrared radiation. Preferably. This makes it possible to provide a functional material as never before.

 Hereinafter, the present invention will be described.

In the present invention, a method for producing a polymer includes a method for producing the polymer by suspension polymerization or emulsion polymerization, a method for dissolving the polymer in a solvent, and then adding a non- or poor solvent to precipitate and precipitate the polymer, and dissolving the polymer in a solvent by heating. There are known a method of cooling and crystallizing after precipitation, and a method of mechanical pulverization using a ball mill, a jet mill, or the like, and any of these methods can be used. Among them, the heat dissolution precipitation method, which is preferable in that the particle size is easily adjusted to 10 to 50 μm, which is relatively fine, can be molded into a spherical shape, and is preferable in that the particles are uniformly adhered to the substrate, is preferable.

Examples of the type of the resin using the polymer in the present invention include polyolefin, polyamide, polyvinyl, and a copolymer resin, and a dissolution index at a softening temperature has a carbon number of 2 or less of 20 or less.
Polymers of six olefins are preferred. Examples of these polymers include polyethylene, polypropylene, polypentene, polybutylene and polyhexene. In this specification, the softening temperature refers to a temperature at which a polymer undergoes thermal deformation under a pressure of 60 psi.

In the present invention, as the method of coating the polymer with the powder, any of the conventionally known methods can be used. For example, a coating method using a surfactant, a polymer, or an inorganic substance, organizing surface functional groups, a free radical reaction, an electron donor acceptor (electron d)
onor-acceptor) reaction, sol-plastic powder adsorption, silane coupling reaction, non-desorption adsorption polymerization polymerization method, etc., grafting monomer by nascent surface activity while grinding, or grafting while cutting polymer Mechanochemical method, curing reaction in liquid,
Examples of the method include phase separation from an organic solvent system, spray drying, and vacuum encapsulation. Of these, a mechanical chemical method using a pulverizer such as a ball mill is preferable because the polymer surface can be uniformly coated while forming fine particles of the powder and can be easily prepared without using a complicated machine.

This method uses a polymer (10 to 50μ)
m) and the powder (1-5 μm) whose surface is to be coated are mixed and ground. Polymers are hardly milled, whereas powders such as inorganics are gradually milled. At this time, a charge is generated on the surface of the polymer particles due to an abrasion charge effect due to abrasion between the surface of the polymer particles and the surface of the powder particles, and the powder particles ground on the surface of the particles adhere in the form of aggregates. At this time, the physical properties of the powder are preferably those having a particle diameter of 1 to 5 μm and Mohs hardness of 4 or less.

In the present invention, any powder can be used as long as it does not deteriorate at the polymer softening temperature, but it is preferable to adhere a functional powder having antibacterial properties, deodorization properties, and far-infrared radiation to various substrates. For example, as an antibacterial powder, for example, silver, copper, zinc, mercury, lead, tin, bismuth, cadmium or thallium and other metal ions and compounds thereof, and stabilized chlorine, hypozincate, chloramine, Organic compounds such as halogenated compounds such as ethylene iodide, alcohols, phenols, ethers, guanidines, thiazoles, quaternary ammonium salts, thiocarbamates, and surfactants can be used in silica gel, alumina, crystalline aluminosilicate Acid salts (synthetic or natural), amorphous aluminosilicate, activated clay, sepialite, clay material, activated carbon, various layered materials, and the like, which are supported by adsorption, bonding, ion exchange, and the like can be used. Further, examples of the powder having a deodorizing property include manganese / iron-containing activated carbon, iron phthalocyanine, stabilized chlorine oxide, and the like. Examples of powder having far-infrared radiation include alumina, silica, zirconia, silicon nitride, titanium nitride, titania, ceria, nickeleria, silicon carbide,
Tantalum carbide and the like can be mentioned.

In the present invention, any conventionally used method can be used as a method for attaching the polymer coated with the powder to the substrate. For example, a gravure method, a kiss coater method, a cast coat method, a calendar method, an electrostatic powder coating method, an electrodeposition coating method, a spray method, a knife coater method, and an impregnation method can be mentioned.

In the present invention, the method of bonding the polymer coated with the powder adhered to the substrate is to heat the used polymer to its softening temperature, melt it, and bond it to the substrate. The heating temperature is 40-100 ° C for polyolefin and 1 for polyamide.
The temperature is 30 to 190 ° C and 60 to 90 ° C for polyvinyl. Any heating method can be used as long as it can maintain the polymer softening temperature (40 to 200 ° C.) for 0.2 to 3 minutes, and any commonly used steam dryer, electric dryer, dryer, etc. may be used. it can.

The material to which the powder bonding method of the present invention is applied can be used in various fields. For example, in the field of clothing, sportswear,
Windbreakers, hospital clothing, surgical clothing, garments, underwear, socks, etc., interiors such as curtains, carpets, carpets, furniture linings, shower curtains, bath towels, wallpapers, etc.
In the field of architectural timber such as sanitary goods, flooring, interior materials, exterior materials and the like can be mentioned.

〔The invention's effect〕

The powder bonding method of the present invention converts the functional powder into a fiber,
It can be uniformly adhered to the surface of various substrates such as paper and wood, and has the following advantages.

(A) It has a uniform adhesive strength.

(B) Processing can be performed regardless of the type of the base material.

(C) The safety of the working environment is high.

(D) Materials having various functions can be obtained.

In particular, in the present invention, since the component of the polymer is processed by applying a polymer having a melting index of 20 or more at the softening temperature, when processed with the polymer, it becomes moderate softness when heated and melted, Has the effect that uniform fixation can be easily performed.

Furthermore, in the present invention, using a polymer component having a melting index of 20 or more at the softening temperature, softening the polymer coated with the powder, the powder, the fiber, paper, wood and the like When the polymer 1 coated with the powder 2 is roughly and densely adhered to the substrate such as the fiber, paper, and wood according to the importance, There is an effect of bonding while maintaining the coarse density.

Further, in view of the above circumstances, since it is not necessary to flow the polymer 1, the heating temperature for the polymer 1 is reduced, or the heating time is shortened, and the base material such as the fiber, paper, wood, etc., which usually has low heat resistance. There is also an effect that it can be applied without damaging the image.

〔Example〕

Next, embodiments of the present invention will be described with reference to Examples.
The present invention is not limited to the embodiments.

Reference Example 1 (Preparation of functional powder “antibacterial zeolite”) Zeolite is a commercially available A-type zeolite (Na ₂ O.Al ₂ O ₃₎
(1.9 SiO ₂ · XH ₂ O: average particle size 1.5 μm) was used. AgN as salt to provide each ion for ion exchange
O ₃ and Zn (NO ₃ ) ₂ were used. Powder dried by heating at 110 ° C
Water was added to 1 kg to make a slurry of 1.3, then stirred and degassed, and further adjusted to pH 5 to 7 by adding an appropriate amount of 0.5N nitric acid solution and water to make a slurry of 1.8 in total volume. Next, for ion exchange, a mixed aqueous solution 3 of 0.08 N AgNO ₃ and 1.8 N Zn (NO ₃ ) ₂ was added to make the total volume 4.8, and this slurry was kept at 40 to 60 ° C. for 10 to 48 hours. It was kept in an equilibrium state while stirring. After the completion of the ion exchange, the zeolite phase was filtered and washed with water at room temperature or warm water until excess silver ions and zinc ions in the zeolite phase disappeared. Next, the zeolite phase was dried by heating at 110 ° C. to obtain a sample. The sample contained 2.5% silver and 13.8% zinc.

Reference Example 2 (Preparation of functional powder "deodorized activated carbon") 20 g of manganese nitrate and 20 g of iron nitrate were dissolved in water 30, 10 kg of coconut shell powder activated carbon (particle diameter: 9 µm) was mixed well, and then heated to 120 ° C. And 9.7 kg of manganese-iron impregnated activated carbon was obtained. The sample contained 3.2% manganese and 5.1% iron.

Reference Example 3 (Preparation of Functional Powder "Far-Infrared Emissive Ceramic") Ceramic having the following composition was sufficiently pulverized with a ball mill.
After mixing, the mixture was fired at 1100 ° C. in an electric furnace to obtain a sample.

SiO ₂ … 52 parts Al ₂ O ₃ … 35 parts ZrO ₂ … 8 parts TaC… 3 parts NiO… 1 part TiN… 1 part Examples 1-3 (Preparation of powder adhesive cloth) Reference example The functional powder obtained in 1-3 and spherical nylon 12 resin as an example of the polymer (Toray sp-500, average particle size 5μ)
m, a softening temperature of 150 ° C., and a melting index of 35) were placed in a ball mill manufactured by Ito Seisakusho and milled at a rotation speed of 150 rpm for 4 hours to obtain surface-coated nylon 12. The coating amount and particle size of the obtained surface-coated nylon 12 are shown in Table 1. Furthermore, polyester woven fabric (SO503WDO made by Unitika, basis weight) with a gravure coater
The powder was bonded to 50 g / m ² ) with 0.4 g / m ² . After the adhesion, the powder was further heated at 155 ° C. for 1 minute with a ventilation dryer to obtain powder-bonded processed cloths of Examples 1 to 3.

Comparative Examples 1 to 3 (Preparation of Liquid Adhesive Worked Cloth) The functional powder obtained in Reference Examples 1 to 3 was mixed with a 3% urethane resin adhesive (Dainichi Seika NPU-5) and dispersed. Polyester nonwoven fabric (manufactured by Unitika) as in Examples 1 to 3
0.4 g / m ^{2 of} powder was adhered to SO503WDO with a basis weight of 50 g / m ² ). After the adhesion, the mixture was further heated at 155 ° C. for 1 minute with a ventilation dryer to obtain a processed liquid adhesive cloth of Comparative Examples 1 to 3.

In addition, as Comparative Example 4, a polyester nonwoven fabric was prepared in which only the polymer not coated with the functional powder was adhered in the same manner as in Examples 1 to 3.

Test Example 1 (Adhesion Test) Each work cloth obtained in Examples 1 to 3 and Comparative Examples 1 to 3
It was cut to 10 cm and subjected to a wear test according to JIS L849. It was worn 100, 250, and 500 times at a rate of 1 time / second, and the adhesive force was evaluated from the powder falling rate at that time. Table 2 shows the results.

Test Example 2 (Antibacterial test) Each of the work cloths obtained in Example 1 and Comparative Examples 1 and 4 was 5 × 5 cm.
And ⁵ ml of Escherichia coli (10 ⁵ cells / ml) was sprinkled thereon and cultured at 37 ° C. for 18 hours. The bacterial solution was washed away with a sterilized saline solution, and the number of E. coli present in the solution was measured to evaluate the antibacterial activity. Table 2 shows the results.

Test Example 3 (Deodorizing Test) For each of the processed cloths obtained in Example 2 and Comparative Examples 2 and 4,
Isobutyric acid and ammonia, one of the malodorous components emitted from the human body, are passed through a column containing 1 m ² of each work cloth, and the initial concentration is 1
The reduction rate (%) of the odorous substance of 0 ppm was measured by the gas detection tube method, and the deodorizing property was evaluated. Table 2 shows the results.

Test Example 4 (far-infrared radiation test) For each of the work cloths obtained in Example 3 and Comparative Examples 3 and 4,
The emissivity (%) at a wavelength of 10 μm was determined by comparing a black body furnace as an emission standard, and the far-infrared radiation was evaluated. Table 2 shows the results.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention, and FIG. 1 is a process diagram of a powder bonding method. 1 ... polymer, 2 ... powder, 3 ... base material.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-49-97852 (JP, A) JP-A-59-80436 (JP, A) JP-A-52-25832 (JP, A) JP-A-61-1982 119778 (JP, A) JP-A-56-129277 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) C09J 5/00 C09D 5/00

Claims (1)

(57) [Claims] 1. A polymer having a powder coated on its surface,
A powder mounting method of heating at a temperature equal to or higher than the softening temperature of a polymer after being attached to a base material such as paper or wood, wherein the component of the polymer has a melting index of 20 or more at the softening temperature, and the powder is used. A powder mounting method characterized by softening a polymer coated with the resin and adhering the powder at the adhesion position on the surface of a substrate such as the fiber, paper, and wood.