JPS60914B2 - makeup sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a decorative sheet that is flexible and durable, and whose surface has the performance of a thermosetting resin decorative board.

Conventionally, thermosetting resin decorative laminates have been produced either by laminating decorative paper and core base paper with thermosetting resin and then applying pressure at high temperature and pressure, or by impregnating thermosetting resin into decorative paper. The conventional method is to heat and press the coated and impregnated paper onto an inorganic or wood-based substrate to integrate it.

Therefore, dry plates with excellent surface properties such as surface hardness, heat resistance, and chemical resistance can be obtained, but the drawback is that the radius of curvature is 4.
It is difficult to attach adhesives to the parts, and the scope of use is limited. In view of the drawbacks of the present invention, the surface performance is similar to that of a thermosetting resin veneer, and the sheet has excellent curved surface processing properties.

In order to use IQ-hoko paper or paper, which is normally used for decorative boards, to make the intended purpose of I-Q-Sake sheet, it is desirable to increase the internal strength of the base paper by soaking it inside with resin. In this case, it is known that impregnating with a thermoplastic dispersion improves the reinforcing effect and the flexibility and properties, but it is difficult to uniformly disperse the plastic particles in the cellulose by just impregnating with a conventional method.
Alternatively, during drying, the plastic particles migrate to the outside of the decorative paper or paper, resulting in a defect that the inner layer is easily torn due to lack of internal reinforcing effect. A method for completely penetrating the inside of paper with a thermoplastic dispersion is to apply a cationic active liquid to the base paper in advance, or to pre-impregnate the base paper with a polycationic compound, and then soak it in an anionic synthetic resin dispersion and dry it. It is known that penetration can be achieved satisfactorily by. In the present invention, (8) Salmon paper or paper is coated with a thermoplastic dispersion on one side (preferably from the back side) and dried.

In this case, as mentioned above, the plastic particles are not completely dispersed in all layers of the paper, and the desired performance value cannot be obtained in terms of the internal strength of the base paper. By coating and soaking a thermosetting resin on the surface layer side of the decorative paper or paper (primary reinforcement) obtained in this way, and drying, it is possible to simultaneously improve the intralayer strength of the decorative paper or paper that is insufficient in the primary reinforcement. This invention relates to a decorative sheet obtained by ensuring the required performance as a phantom salmon sheet. Next, the present invention will be explained in more detail as follows.

The resin to be coated and impregnated from one side (especially the back side) of the decorative paper or paper for reinforcement is a thermoplastic dispersion of polyacrylate, polyvinyl acetate, polyvinyl chloride, or polymethacrylate, or an acrylate group, or a methacrylate ester. group and methylmethacrylamide simple substance SB
It is a reticulated synthetic resin dispersion based on R, NBR.

If these resin dispersions alone require impregnating properties, the impregnating effect can be achieved by using resin dispersions to which an anionic wetting agent is added. The resin dispersion is coated and impregnated from one side (preferably the back side) of decorative paper or paper using a coating dryer, and then heated and dried at 100 to 180 degrees Celsius, thereby dispersing water and at the same time adding to the thermoplastic properties. Promote crosslinking of resin and improve the intralayer strength of decorative paper or paper. The in-layer strength of this base paper with only primary impregnation is 3 in plane tensile strength.
~5k9/c cooperation can only be secured. On the other hand, as the resin to be coated and impregnated on the surface layer side, a thermosetting resin such as a far-curing type melamine resin, amino alkyd resin, unsaturated polyester resin, diallyl phthalate resin, etc. is used.
The curing agent, curing accelerator, etc. may be selected based on the type of resin, heat-drying conditions, and the resin's poto-trifling. As for the matting agent, for example, an inorganic powder mixed with silicon oxide that meets the manufacturing conditions may be selected. The thermosetting resin is coated on the surface layer side of decorative paper or paper and at the same time impregnated inside. Thereafter, curing is accelerated by heating and drying at 110°C to 180°C. The in-layer strength of the decorative sheet thus obtained was 8 in plane tensile strength.
Upload from k9/c po to 15k9/ji. - The decorative sheet obtained as described above is maneuverable and has surface performance equivalent to that of a thermosetting resin decorative board.

Next, a typical example will be described. Example 1 Aqueous dispersion of modified acrylic acid ester copolymer with excellent self-crosslinking properties, solid content 30%, viscosity 5 ratio p, average particle size 0
．． 0.2 part of an anionic wetting agent was added to the 1 to 0.3 molar mixture to prepare a primary immersion resin.

Coat and mix the resin from the back side of a decorative base paper with a basis weight of 55 mm and control it with a round bar so that the amount is 20 to 25% by weight.Then, heat dry for 5 minutes in a dryer at 160 qC to obtain a primary compound. A soaked sheet was created.

Next, a plasticized type melamine resin with a solid content of 45% and a viscosity of 5&p is coated from the surface side of the primary impregnated sheet and controlled with a round bar so that it becomes 10 to 15% by weight of the primary impregnated sheet. then 150oo for 10
A decorative sheet was prepared by heating and drying for a minute.

The decorative sheet has the desired performance as shown in Table 1. Example 2 Aqueous dispersion of modified acrylic acid ester copolymer with excellent self-crosslinking properties, solid content 30%, viscosity 5
Ratio p, average particle size 0.1-0.3, anionic wetting agent 0. A group part was added to prepare a resin for primary mixing.

Coat and impregnate the resin from the back side of IQ ship paper with a grammage of 45 cm/㎜ and control it with Marufuji to 25-30%, then heat dry for 5 minutes in a dryer at 160 q0. A primary impregnated sheet was created.

Next, coat and impregnate an amino alkyd resin with a solid content of 40% and a viscosity of 6 p from the surface side of the primary co-soaked sheet so that it becomes 17 to 2% by weight based on the primary co-soaked sheet. control. Thereafter, a decorative sheet was prepared by heating and drying at 130° C. for 5 minutes. The decorative sheet has the desired performance as shown in Table 1. Example 3 A resin for primary impregnation was prepared by adding 0.2 parts of an anionic wetting agent to SBR having a solid content of 50% and a viscosity of 6 p.

Coat and mix the resin from the back side of decorative paper with a basis weight of 55 kg/mt, control it with a round rod so that it becomes 25 to 3% by weight, and then heat dry for 5 minutes in a 140 q○ dryer. A primary co-soaked sheet was prepared. Next, coat a plasticized type melamine resin with a solid content of 45% and a viscosity of 5 Kp from the surface side of the primary impregnated sheet, using a round rod to make the amount 12 to 18% by weight based on the primary impregnated sheet. control.

Thereafter, it was heated and dried for 10 minutes in a 15,000° dryer to produce a decorative sheet. The decorative sheet has the desired performance as shown in Table 1. Table 1

Claims (1)

[Scope of Claims] 1. A decorative sheet made by coating or impregnating paper with a plastic aqueous dispersion on one side and a fast-setting thermosetting resin on the other side. 2. The decorative sheet according to claim 1, wherein the paper is decorative paper. 3. The decorative sheet according to claim 1, wherein the surface to which the aqueous plastic dispersion is applied or impregnated is the back surface. 4. The decorative sheet according to claim 1, wherein the surface coated with or impregnated with a fast-curing thermosetting resin is the front surface.