JPS6159350B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to fibrous material clay, particularly fibrous material clay that is manufactured by mixing a colored fibrous material with a glue and applying it to the surface of a molded object such as styrofoam, synthetic resin, or glass. . Although it is not excluded that the fiber material clay of the present invention can be used alone to make a model, that is, to be used as clay, it is generally a model made of styrofoam, synthetic resin, celluloid, glass, metal, wood, etc. It is used as clay, which is spread thinly and applied to the surface of the earth to create an elegant surface. This type of fibrous clay is characterized by (i) the degree of adhesion to the surface of the object when it is applied by hand or spatula, and (ii) the degree of elongation when it is applied to the surface of the object. , (iii) stickiness or adhesion to the hands or spatula during application, (iv) texture of the clay itself, (v) speed of drying, (vi)
Problems include peeling after drying and (vii) cracking and roughness of the clay surface after drying. When the degree of adhesion mentioned in (i) above is not sufficient, in the process of painting, the area that was applied first is pulled by the area that will be applied later, resulting in a so-called "mekure" shape. If the elongation mentioned in (ii) above is not sufficient, it will not be possible to apply the material by pressing it onto the surface of the object and spreading it thinly. state. the above
If the stickiness or adhesion caused by (iii) is too strong, the amount of adhesion on the hands and spatula increases instead of on the surface of the molded object, making it difficult to work and making the hands dirty. When the texture described in (iv) above is not good, the fibers become noticeable and the texture becomes rough. If the speed of drying as described in (v) above is slow, for example, if it takes a day and night, the joy of touching the workpiece will be greatly lost if it is used for crafts in elementary schools (for example, if it dries within an hour) desired). If the peeling phenomenon described in (vi) above exists after drying, the surface of the workpiece after painstaking machining will become uneven. If cracks occur on the surface of the clay after drying as described in (vii) above, the beauty of the surface of the workpiece will be lost, and if the surface of the clay is not smooth enough, fibrous material will become noticeable on the surface of the clay. It becomes a shape. In consideration of the above-mentioned problems, the present invention uses a paste-like solution of a copolymer of vinyl alcohol and vinyl acetate alcohol as a glue material to be mixed with the fiber material, thereby solving the above-mentioned problems. It aims to solve the problem. The above adhesive using a copolymer consisting of vinyl alcohol and vinyl acetate alcohol is a white or transparent adhesive, and the inventor has found that when mixed with crushed fiber material, it does not become sticky to hands or spatulas. It has been found that this material has no adhesive properties, has a good degree of adhesion to the surface of a molded body, and has sufficient elongation as a clay material, making it ideal as a clay material for fibers. The fibrous clay according to the present invention is produced as follows. In other words, a fiber material such as wood pulp is crushed in water, the fiber material is colored with a dye or pigment, and then the weight ratio of the fiber material to water is 100:100.
Or dehydrate until the ratio is about 100:50. On the other hand, water is added to the copolymer powder consisting of vinyl alcohol and vinyl acetate alcohol in an amount of about 15 to 3 times by weight, and while heating to an appropriate temperature (about 90℃), the vinyl alcohol and vinyl acetate are mixed.・Create glue by melting a copolymer consisting of alcohol. An appropriate amount of antifoaming agent and antifungal agent is added to the glue material. The colored material (containing water) configured as described above and the glue material (containing water) containing the copolymer of vinyl alcohol and vinyl acetate alcohol are mixed and kneaded together. At this time, polyethylene oxide is added as an additive in an amount of about 2% by weight based on the total weight to suppress stickiness and give some gloss. EXAMPLE The inventor used Denka HV Polymer Powder K0094 (trade name) as a copolymer of vinyl alcohol and vinyl acetate alcohol as the glue material to be mixed into the fiber material. According to analysis by a testing agency, the glue material is a copolymer consisting of vinyl alcohol (hereinafter abbreviated as V _A ) and vinyl acetate alcohol (hereinafter abbreviated as V _AC ), and V _A /V _AC = 86 /14 [mol] was confirmed by an infrared spectrophotometer using an interferometer. Then, the following six types of clay were experimentally manufactured by changing the amount of the glue material. The weight percentages shown below represent the percentages based on the total clay. That is, (A) a coloring material containing 20% by weight of pulp (the same applies for crushed paper waste) and 10% by weight of water;
15% by weight vinyl alcohol and vinyl acetate.
Clay (hereinafter referred to as clay A) is a mixture of a glue material containing a copolymer of alcohol and 53% by weight of water, 1.7% by weight of polyethylene oxide, and 0.3% by weight of a fungicide. (B) A colored material containing 20% by weight of pulp and 12% by weight of water, a copolymer of 12% by weight of vinyl alcohol and vinyl acetate alcohol, and 54.64
Clay (hereinafter referred to as clay B) is a mixture of sizing material containing 1.36% by weight of water and 1.36% by weight of polyethylene oxide. (C) A colored material containing 20% by weight of pulp and 20% by weight of water, a copolymer of 10% by weight of vinyl alcohol and vinyl acetate alcohol, 48.6% by weight of water and 1.4% by weight of polyethylene oxide. Clay mixed with glue material containing (hereinafter referred to as clay C). (D) A colored material containing 20% by weight of pulp and 20% by weight of water, a copolymer of 8% by weight of vinyl alcohol and vinyl acetate alcohol, 51.1% by weight of water and 0.9% by weight of polyethylene oxide. Clay mixed with glue material containing (hereinafter referred to as clay D). (E) A colored material containing 20% by weight of pulp and 20% by weight of water, a copolymer of 5% by weight of vinyl alcohol and vinyl acetate alcohol, 54.3% by weight of water and 0.7% by weight of polyethylene oxide. Clay (hereinafter referred to as clay E) mixed with a glue material containing. (F) A colored material containing 20% by weight of pulp and 20% by weight of water, a copolymer of 3% by weight of vinyl alcohol and vinyl acetate alcohol, 56.6% by weight of water and 0.4% by weight of polyethylene oxide. Clay mixed with glue containing (hereinafter referred to as clay F). The results of investigating the characteristics of the above six types of clay A to F are shown in the following table.

[Table] However, ◎ is excellent, ○ is good, △ is fair, × is not possible.In general, the weight ratio of the copolymer consisting of vinyl alcohol and vinyl acetate alcohol to the pulp decreases (especially for clays E and F). (case), the fibrous nature of the clay itself becomes noticeable. Then, when applying it to the surface of the model,
The clay loses its elongation, making it difficult to push out and can only be applied by pressing, and the clay itself becomes crumbly. Moreover, after drying, the surface of the clay becomes uneven.
In addition, especially when the molded object has a glossy finish such as glass, when trying to press and adhere the molded object, the molded object tends to form a sticky shape. On the other hand, the weight ratio of the copolymer consisting of vinyl alcohol and vinyl acetate alcohol to the pulp increases, and especially in the case of clay A, it becomes easier to peel off when adhered to a molded object such as glass. This can be considered to be due to the following reasons. In other words, in the case of clays E and F, the amount of copolymer consisting of vinyl alcohol and vinyl acetate alcohol is small, which allows for misalignment between fibers due to shrinkage during drying. Even if the degree of adhesion to the surface of the molded object is small, peeling after drying is unlikely to occur. On the other hand, in the case of clay A, the shrinkage during drying causes the surface of the molded object to be misaligned, and peeling is likely to occur. In addition, in the case of clay A, the clay feels sticky, and when it is applied, it may spread sufficiently and be applied thinly, so it tends to have a sticky feel and lose its soft texture. From the above, clay B, C, and D are considered to be excellent products, clay A is considered to be approximately at the upper limit of the amount of copolymer consisting of vinyl alcohol and vinyl acetate alcohol, and clay E is vinyl·
This is considered to be approximately the lower limit of the amount of a copolymer consisting of alcohol and vinyl acetate/alcohol. As explained above, in the clay according to the present invention, a glue material using a copolymer of vinyl alcohol and vinyl acetate alcohol is used. For this reason, in the case of conventional clay of this type, especially when it is applied to glass, metal, or shiny synthetic resin, the adhesion strength is not sufficient, and when it is pressed and applied, it may cause creases. However, in the case of the clay of the present invention, all these problems are solved.

Claims (1)

[Scope of Claims] 1. A fibrous material clay in which crushed fibrous material is colored and a sizing material is mixed therein, and the sizing material is a sizing material in which a copolymer of vinyl alcohol and vinyl acetate alcohol is dissolved as the sizing material. is used, 20% by weight of the fiber material, 5 to 15% by weight of the above copolymer of vinyl alcohol and vinyl acetate alcohol, 0.4 to 2.25% by weight of additives,
A fibrous material clay characterized by being composed of residual water. 2. The fibrous clay according to claim 1, wherein the fibrous material is made of wood pulp or a fibrous material whose main component is wood pulp. 3. Claim 1 or 2, wherein the additive includes polyethylene oxide, and the polyethylene oxide is blended in a weight ratio of 8% to 15% with respect to the copolymer. Fiber material clay as described in section.