JPS6228744B2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to improved flocked laminates.

More specifically, the flocked laminate consists of a synthetic resin layer, an adhesive layer, and a flocked layer, and the synthetic resin layer is obtained by applying an aqueous dispersion containing a synthetic resin powder having hot melt adhesive properties and drying it by heating. The present invention relates to a flocked laminate characterized by being a resin layer, and optionally provided with a release material under the synthetic resin layer.

Conventionally, flocked laminates have been used in a wide range of fields, such as markings on fabrics, clothing as badges, decorations for bags; handicraft supplies, educational materials; building materials, interior parts of vehicles, etc.; and other materials. ing. In many of these applications, flocked laminates are used by adhering them to adherends, and such flocked laminates generally consist of a synthetic resin base layer with hot melt adhesiveness, an adhesive layer, and a flocked layer. 3 stacked together in order
It consists of layers. When this laminate is put to practical use, a particularly required characteristic is that the flocked layer firmly adheres to the base layer.

On the other hand, Japanese Patent Publication No. 52-25433 discloses a flocked laminate consisting of four layers: a mold release material 1, a synthetic resin base layer 2 having hot melt adhesive properties, an adhesive layer 3, and a flocked layer 4, as shown in FIG. is disclosed, and it is described that the flocked layer 4 can be firmly adhered to the base layer 2 using the adhesive layer 3.

On the other hand, JP-A-54-18874 discloses a two-layer flocked body in which a flocked layer is directly flocked onto a thermoplastic resin layer without using an adhesive. However, this flocked body has drawbacks such as the fact that the flocked layer is not firmly adhered to the thermoplastic resin layer.

This invention is a further development of the above invention. That is, as shown in FIG. 2, a mold release material 5 is provided as necessary, and a synthetic resin layer 6 is sequentially formed thereon.
The synthetic resin layer 6 consists of an adhesive layer 7 and a flocked layer 8, and the synthetic resin layer 6 is not just a film of a resin having hot melt adhesive properties, but is made by applying an aqueous dispersion containing a synthetic resin powder having hot melt adhesive properties and drying it by heating. It is characterized by being a resin layer obtained by. As a result, the surface of the synthetic resin layer 6 that is bonded to the adhesive layer 7 is different from the surface of a resin film that is manufactured in advance and usually has a smooth surface.
Since it has a large number of fine irregularities, the anchoring effect of the irregularities allows the flocked layer 8 to be well adhered to the synthetic resin layer 6 via the adhesive layer 7.

As the mold release material used in the flocked laminate of this invention, a conventional one can be used. Among these, those having the following properties are preferred.

a. It has low hygroscopicity. b. It has almost the same shrinkage rate as the synthetic resin layer. c. It does not harden when heated and does not undergo changes that would impair the quality of the laminate. d. Adhesion to the synthetic resin layer. (e) Little migration of silicone resin (f) Stable releasability Synthetic resin powders with hot melt adhesive properties used in this invention include polyamide copolymer resin, polyester resin, polyethylene resin, and ethylene-vinyl acetate. Polymer resins, etc. are possible.

In particular, from the viewpoint of adhesive strength and washing resistance, which are important properties when applied to textile products,
Polyamide copolymer resins at 160°C are suitable, such as nylon 6/66/12, 6/69/12, 6/
610/12, 6/612/12, 6/66/11, 6/66/
69/12, 6/66/610/12, 6/66/612/12,
There are powders such as 6/66/11/12 and 6/69/11/12. The melting point was measured by DSC at a temperature increase rate of 16°C/mm.

In addition, as a synthetic resin powder, the average particle size is approximately 0.1
~500μ can be used. There is no need to particularly limit the particle size from the viewpoint of adhesion, but from the viewpoint of dispersion in an aqueous dispersion of synthetic resin powder having hot melt adhesive properties and fluidity as an aqueous dispersion, finer particles are preferable.

In addition, the above synthetic resin powder having hot melt adhesive properties is mixed with a thickener, a surfactant, water, and other additives in a conventional manner, for example, using a kneader type stirrer, and the above powder is uniformly dispersed into an aqueous dispersion. It is used by coating it on a support that has mold releasability.

As thickeners, common ones such as sodium polyacrylate, polyacrylamide hydroxyethyl cellulose, and polyvinyl alcohol are used, and as surfactants, for example, polyoxyethylene nonylphenol ether, polyoxyethylene monooleate, and Oxyalkylene glycol derivatives and the like are used.

The blending ratio of the synthetic resin powder in this aqueous dispersion is 10 to 50%, preferably 20 to 40%. If the blending ratio of the synthetic resin powder is lower than the above range, the amount of the synthetic resin powder applied to the adherend will be insufficient, resulting in poor adhesion, and if it is higher than the above range, the paste will become unstable and may separate. It becomes difficult to apply uniformly to the mold material. Also, the thickness of the coating layer is usually 100
~200μ, and is appropriately adjusted depending on the viscosity of the paste or the application method.

The adhesive used in the present invention is not particularly limited, and any adhesive that can generally be used for flocking may be used. For example, the following polymer emulsion can be exemplified.

Namely, natural rubber latex, synthetic rubber latex such as nitrile-butadiene rubber, styrene-butadiene rubber, chloroprene rubber, and synthetic resins such as polyacrylic acid ester, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyethylene-vinyl acetate, epoxy resin, and polyurethane. Most polymer emulsions can be used, including emulsions. Of course, these also include modified emulsions that are commonly used.

Furthermore, these polymer emulsions can be used alone or in combination.

Furthermore, thickeners, pigments, crosslinking agents (melamine resins, epoxy resins, isocyanate blocks, etc.), catalysts for crosslinking, etc. are added to these polymer emulsions as necessary.

Dyes and pigments can be added to the synthetic resin layer and/or the adhesive layer as described above in order to impart hiding properties to the adherend. In other words, it is possible to avoid being affected by the color of the adherend to which the flocked laminate is to be bonded. Titanium oxide fine powder, black (e.g. Toyo Dry Color TN-0643), red (e.g. Toyo Dry Color TN-4274), and blue (e.g. Toyo Dry Color TN-4274) are used as dyes and pigments with strong hiding power.
TN-7268), etc. Further, when blending dyes and pigments into the synthetic resin layer, these dyes and pigments can be added in advance to the synthetic resin powder itself having hot melt adhesive properties.

The flocked laminate of this invention is generally produced as follows.

The aqueous dispersion containing the synthetic resin powder having hot melt adhesive properties is coated onto a support having mold releasability by a conventional method, for example, using a roll coater. Next, this is heated and dried at 150 to 200°C. An adhesive is then applied on the resulting synthetic resin layer in a conventional manner, for example using a roll coater. In addition, after applying the aqueous dispersion, there is no need to heat and dry it.
Adhesive can also be applied immediately. The short fibers are then flocked onto the adhesive layer primarily by electrostatic flocking (electrodeposition or electro-flocking). Next, heating and drying is performed at about the baking temperature of the polymer emulsion of the adhesive layer.

This heating and drying turns the synthetic resin layer into a film, yielding a flocked body that can be peeled off from a support having releasable properties.

As this support, a release material such as release paper can be used. In this case, a new product can be manufactured with the release paper still attached.

Furthermore, the support may be a belt made of a material that itself has mold release properties, such as Teflon resin, or a belt made of a heat-resistant synthetic material such as heat-resistant rubber or polyurethane coated with a mold-release agent such as silicone resin. can be used.

Further, a sheet or film made of a synthetic resin such as polyethylene, polypropylene, or polyethylene terephthalate coated with a release agent such as silicone resin can also be used as the support.

When these supports are used, the flocked body is peeled off from the support to produce a product.

Of course, in this case, a release material such as release paper may be attached after the flocked body is peeled off from the support if necessary.

The short fibers used in this invention are dyed and electrodeposited fibers made of acrylic, nylon, polyester, rayon, cotton, modacrylic, etc., which are bundled and cut into arbitrary lengths. used.

When using the flocked laminate of this invention, if there is a mold release material, peel it off, stack the synthetic resin layer facing the adherend, heat and press from the side opposite to the flocked part, and the synthetic resin layer are fused and the flocked laminate and the adherend are adhered.

Next, the present invention will be illustrated based on Examples, but the present invention is not limited thereby.

Example 2 parts by weight of sodium polyacrylate as a thickener was added to 100 parts by weight of water, and the mixture was stirred for about 4 hours using an impeller type stirrer. 1 part by weight of polyethylene glycol was added to this thickener solution, stirred for 30 minutes, and then polyamide resin nylon 6/6/12/12 (copolymerization ratio 30/30/
40, melting point 115℃) was added and stirred for an additional hour, and the viscosity was 75,000 cps (BL type viscometer, rotor No. 4, with polyamide resin uniformly dispersed).
A milky white aqueous dispersion was obtained.

After applying this aqueous dispersion to a thickness of about 270μ on release paper whose surface was treated with silicone,
After drying by heating at a temperature of 150° C. for 9 minutes, a hot melt resin layer of polyamide resin in the form of a film with a thickness of about 100 μm was obtained on the release paper. On top of this film-like hot melt resin layer, a methacrylic acid-modified ethyl acrylate-butyl acrylate copolymer emulsion (solid content concentration 46%, ammonia containing 5 parts by weight of melamine resin per 100 parts by weight of solid content of the emulsion) is applied. (thickened to approximately 1000 cps with water), and on top of this, short rayon fibers (fineness: 7.5 denier, fiber length: 0.5 mm) were directly flocked using the electrostatic flocking method, and then at a temperature of 90℃. A flocked laminate was created by baking with

Next, cut this flocked laminate into the desired shape, peel off the release paper attached to the opposite side of the flocked surface, place it on a stockinette shirt, and heat it to 150°C using an iron.
This flocked laminate was thermally bonded by heat pressing for 10 seconds. The adhesive strength and washing resistance of this flocked laminate were very good.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a flocked laminate disclosed in Japanese Patent Publication No. 52-25433, and FIG. 2 is a sectional view of an embodiment of the flocked laminate of the present invention. 1, 5... Mold release material, 2... Synthetic resin base layer having hot melt adhesive properties, 3, 7... Adhesive layer,
4, 8...Flocked layer, 6...Hot melt resin layer.

Claims (1)

[Scope of Claims] 1. A flocked laminate comprising three layers: a synthetic resin layer, an adhesive layer and a flocked layer thereon in order, and the synthetic resin layer is an aqueous dispersion containing synthetic resin powder having hot melt adhesive properties. A flocked laminate characterized in that it is a resin layer obtained by coating the body and heating and drying it. 2. In the flocked laminate, a mold release material is applied, and an aqueous dispersion containing synthetic resin powder, which consists of four layers, a synthetic resin layer, an adhesive layer, and a flocked layer in this order, and the synthetic resin layer has hot melt adhesive properties, is applied thereon. A flocked laminate characterized in that it is a resin layer obtained by heating and drying.