JP3015606U - Thermal adhesive pollution control sheet - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a sheet that can be easily and inexpensively surface-treated to prevent adhesion and contamination of an adhesive or concrete on the surface of a wood material. [Structure] A fibrous layer 3 is formed on the lower surface of a polyolefin resin film 1 with an adhesive polyolefin copolymer resin 2 interposed therebetween.
To form a portion 5 impregnated with the adhesive polyolefin-based copolymer resin on the upper side in the fibrous layer 3 and apply a thermosetting adhesive 4 to the lower surface of the fibrous layer 3 to form the fiber. The heat-adhesive stain-preventing sheet is provided with a portion 6 impregnated with an uncured thermosetting adhesive on the lower side of the quality layer 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention aims at facilitating cleaning, peeling and demolding by preventing adhesives, concrete, etc. from firmly adhering to the surface of wood materials, wooden molds, etc. The present invention relates to a sheet for sticking to a surface of a wooden material for the purpose of, and a sheet for preventing pollution, which simplifies the work when sticking to the surface of a wooden material.

[0002]

[Prior art]

 As a sheet for the purpose of sticking to the surface of a wood material to prevent the adhesion of concrete, adhesive, etc., the present inventor has proposed it as Japanese Patent No. 1747019 and Utility Model Registration No. 1956653. In addition, fluororesin films and sheets with good anti-adhesion effects are also used in some areas. A large number of sheets for the purpose of protecting and decorating the surface of wood materials are generally marketed as decorative films and decorative sheets. However, in order to firmly adhere any film or sheet to a wood material, it is necessary to apply an adhesive and then press-bond it with a press or roll.

[0003]

[Problems to be solved by the device]

 When the above fluororesin is used on the surface as a sheet for preventing the adhesion of concrete or adhesive to the surface of wood materials and contamination, its releasability and non-contamination property are good, but fluororesin Since it is expensive, it cannot be used easily. There are water-based, oil-based, heat-meltable, and thermosetting adhesives, etc. as the adhesive used to attach the sheet to the surface of the wood material. It is not suitable for work applications, and heat-melting ones require cold pressure because bubbles are generated when decompressing after heating under pressure. Thermosetting adhesives can be bonded only by heating under pressure. However, it is usually troublesome to handle because it is necessary to sandwich the adhesive-impregnated paper separately. As a simple bonding method, it is possible to use pressure-sensitive adhesive, but pressure-sensitive adhesive is not practical because it has weak adhesion to wood materials with a rough surface, and it is simple and reliable for wood materials. There is a need for an inexpensive pollution control sheet that can achieve adhesion.

[0004]

[Means for solving problems]

 The present invention has been made in order to reduce the price, and at the same time, to improve the handling workability of the thermosetting adhesive. First, as the material for the first layer on the surface, a polyolefin-based resin film which is inexpensive, has no polarity, and does not adhere to concrete or adhesive is used. As the second layer, an adhesive polyolefin-based copolymer resin for the purpose of firmly adhering the first layer and the third layer on the surface was used. As the fibrous layer of the third layer, a paper or a non-woven fabric excellent in adhesiveness with a thermosetting adhesive and impregnating with an uncured adhesive is used, and the adhesive polyolefin-based copolymer resin is used. The fibrous layer was impregnated to the middle level. When using paper, decorative paper may be used in consideration of decorativeness. As the fourth layer, a thermosetting adhesive is applied to the lower surface of the fibrous layer, and a portion impregnated with the uncured thermosetting adhesive is provided on the lower side of the fibrous layer, and We made it easy to bond by simply applying pressure and heating. As the thermosetting adhesive, phenol resin, melamine resin or the like is used.

[0005]

[Action]

 Since the first layer on the surface of the present invention uses a polyolefin resin film, even if concrete or adhesive adheres, it can be easily peeled and removed by drying and solidifying. have. The internal structure of the sheet is composed of a second layer of an adhesive polyolefin-based copolymer resin and a third layer of a fibrous layer made of paper, non-woven cloth or the like. The copolymer resin has a function of firmly bonding the polyolefin resin film on the surface to the fibrous layer, and the fibrous layer serves as a carrier for the uncured thermosetting resin and at the same time as the polyolefin copolymer resin. It acts to connect with the thermosetting resin. In addition, there is an uncured thermosetting resin that is partially impregnated in the fibrous layer on the back surface, so simply by pressing and heating with a hot press, the resin will once melt and soak into the wood material. After being transparent, it is cured and a strong bond is obtained.

[0006]

【Example】

In the first embodiment, first, a composite sheet up to the third layer is manufactured. A 50-micron-thick polypropylene film was used as the first layer film 1, a commercially available kraft paper of 40 g / m ² was used as the fibrous layer 3, and an adhesive polyolefin copolymer resin 2 was used as the adhesive layer 2. The modified polypropylene resin ER-4 20L manufactured by Denko Co., Ltd. was compressed with a pressure roll and a cooling roll while being discharged between the polypropylene film and the paper at a temperature of 280 ° C. and a film thickness of 50 microns using an extrusion laminator machine. As a result, a three-layer composite sheet having a part 5 impregnated with the modified polypropylene resin ER-420L on the upper side in the fibrous layer 3 was produced.

Next, as a thermosetting adhesive for the fourth layer, phenol resin manufactured by Showa Polymer Co., Ltd., Shonor BLS-356 was applied to the paper side surface of the composite sheet at a rate of 50 g / m ^2. After that, it is dried with warm air at 80 ° C. for 10 minutes, and the above-mentioned Sinorol BLS-356 is in an uncured state on the lower side in the fibrous layer 3 (the reaction product is softened or melted when heated, but a solvent such as alcohol or acetone is used). A heat-adhesive stain prevention sheet provided with the impregnated portion 6 in a state of swelling and not completely dissolving, that is, a B-state) was obtained.

In the second embodiment, a polypropylene film having a thickness of 30 μm is used as the first layer film 1 for producing a composite sheet, and a commercially available 23 g / m ² paper is used as the fibrous layer 3. Using a paper having a wood grain pattern printed on the inter-strengthened paper, a modified polypropylene resin ER-420L manufactured by Showa Denko KK was used as the adhesive polyolefin-based copolymer resin 2 at a temperature of 280 ° C. using an extrusion laminator machine. A portion 5 impregnated with the modified polypropylene resin ER-420L on the upper side in the fibrous layer 3 by pressing with a pressure roll and a cooling roll while discharging between a polypropylene film and paper with a film thickness of 15 microns. A composite sheet having a three-layer structure was manufactured.

Next, as a thermosetting adhesive for the fourth layer, phenol resin manufactured by Showa Polymer Co., Ltd., Shonor BLS-356 was applied to the paper side surface of the composite sheet at a rate of 50 g / m ^2. After that, it was dried with warm air at 80 ° C. for 10 minutes, and the heat-bonding property with a beautiful wood pattern having a portion 6 impregnated with the above-mentioned Shonor BLS-356 in an uncured state on the lower side in the fibrous layer 3. A pollution control sheet was obtained.

In the third embodiment, as the fibrous layer 3, a nonwoven fabric Benlyse WP-402 manufactured by Asahi Kasei Kogyo Co., Ltd. is used. A heat-adhesive stain-proof sheet for processing was obtained.

[0011]

[Effect of device]

 When using the sheet according to the present invention to prevent contamination on the surface of plywood, it is sufficient to polymerize the sheet according to the present invention on the plywood and press and heat with a hot press as it is. The product can be obtained in a very simple process without the need to apply an adhesive. Further, since the liquid adhesive is not used, the gluing step can be omitted, and there is no fear of the working environment being deteriorated by the liquid adhesive. Further, the number of steps is reduced, so that the production efficiency is improved.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of a pollution control sheet according to the present invention.

[Explanation of symbols]

1 polyolefin-based resin film 2 adhesive polyolefin-based copolymer resin 3 fibrous layer 4 thermosetting adhesive 5 part of the fibrous layer impregnated with adhesive polyolefin-based copolymer resin 6 inside fibrous layer Lower part that is impregnated with uncured thermosetting adhesive

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B28B 7/38 B32B 7/12 9268-4F 27/12 8413-4F

Claims (3)

[Scope of utility model registration request] 1. A portion in which a fibrous layer is adhered to a lower surface of a polyolefin resin film through an adhesive polyolefin copolymer resin, and the upper side of the fibrous layer is impregnated with the adhesive polyolefin copolymer resin. A thermosetting adhesive is applied to the lower surface of the fibrous layer, and a portion impregnated with an uncured thermosetting adhesive is provided in the lower side of the fibrous layer. Sheet. 2. The heat-adhesive stainproof sheet according to claim 1, wherein the fibrous layer is paper. 3. The heat-adhesive stain prevention sheet according to claim 1, wherein the fibrous layer is a non-woven fabric.