JP2005320494A - Woody interior wall material capable of spray coating - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a good quality wall material, the viscosity of which can easily be adjusted when in use in accordance with intended use and which is convenient in spite of the use of powdery plant fibers short in fiber length like wood flours. <P>SOLUTION: In general, it is extremely difficult to obtain a convenient, good quality wall material by using nearly powder-like plant fibers which is hard to effectively utilize the entanglement of fibers as a bond of the wall material, and by only adjusting the density of a water-based glue. In this invention, the above problem is solved by applying characteristics of a thickening polysaccharide imparting to a solution viscosity. The extremely easily coatable convenient wall material can be realized by adding force such as coating, pressing or spreading to the wall material containing a proper amount of the above thickening component. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a pollution-free indoor coating wall material that can be applied easily and can be spray-coated with wood powder as a main material, and a method for producing the same.

Conventionally, there has been a soil wall as an indoor wall material, and recently, a wall material in which fiber waste is hardened with a binder has become mainstream. As the fibers, straw, paper, pulp, chemical fibers, etc., which have a certain fiber length are basically used. The wall material is required to have certain conditions before and after the coating operation. That is, when it is placed on a trowel, it has an appropriate viscosity, and when applied, it has good elongation and is less likely to become uneven. These characteristics are considered to be a result of complicated involvement of the entanglement between the fibers and the strength of the interaction between the molecular surface of the constituent component and the water molecule. Accordingly, the amount of water at the time of use is important, and the ease of use is currently adjusted by the entanglement of the fiber length and the amount of water. For example, if the amount of water added is too large, there are problems such as drying time and dripping, and conversely, if the amount of water is too small, it becomes difficult to spread on the base material. You can see the importance of adjusting the amount of water. For this reason, there are no commercially available walls that use a large amount of wood flour or fiber that is too short. In particular, in the case of wood flour, it seems to be important to adjust the viscosity suitable for the wall material in order to achieve a product finish comparable to the conventional method.

Problems to be solved by the invention

In recent years, environmental hygiene has become an important issue in the housing construction field, and natural-oriented momentum has increased. There is great expectation for the use of wood that has been in the Japanese climate since ancient times. Thus, when using wood powder as a raw material for conventional wall materials, it is important to overcome the above-mentioned problems first. That is, in the case of wood powder, since there is less entanglement of fibers compared to paper and pulp, it is difficult to adjust the viscosity suitable for wall coating work. Therefore, if an appropriate thickening effect is given to the wall material immediately before the construction and a rheological change is made such that the viscosity is lowered by the coating operation, the coating property is excellent and spray coating is also possible. Such a principle is actively used in the food field. The most familiar example is mayonnaise products. This is a phenomenon in which the flow characteristic of mayonnaise is increased by the action of suppressing the tube by adding a thickening polysaccharide to the tube, and after it is further pushed out, it returns to its original viscous state and maintains its original shape. The biggest problem is to reproduce this similar phenomenon in the painted wall material.

In order to solve the above problems, the present invention takes the following technical means.
It is important how to maintain the viscosity of the wood powder-adhesive-water system in order to make a good wood-based wall material that is easy to use. For example, when a wall material prepared by simply using a system of wood flour and starch is poured into a glass separatory funnel without a paper roll and allowed to fall freely, a phenomenon of separation of water and solids occurs depending on the amount of water. However, when a small amount of thickening polysaccharide is added to this system and a similar experiment is attempted, the wood flour and starch paste are united, begin to fall like pulling a thread, and a remarkable rheological change can be observed. This experimental result is an index for adjusting a high-quality wall material mainly composed of wood powder. Specific means are as follows.

Any kind of wood flour can be chosen. However, in terms of the main component, the amount is optimally 50% by weight or more, preferably about 80% by weight, and may be used as colored wood powder as necessary. Also. The particle diameter is 1000 μm or less, and as with wood powder, the fiber length is as short as the powder. A close particle size can be selected.

As the adhesive, any kind of starch can be used when it is used in combination with pregelatinized starch or gelatin or gluten. If water resistance is required, a synthetic adhesive can be used. Moreover, the modified starch for paste in which other additives, such as antiseptic | preservative and a pigment, were previously prepared may be sufficient. The blending amount is 10 to 20% by weight, preferably about 10% by weight.

Xanthan gum is the most suitable thickening polysaccharide. Further, damarind gum, locust bean gum, duran gum, guar gum or the like alone or in combination with xanthan gum may be used.

As other additives, flame retardants, pigments, preservatives and the like are used in appropriate amounts, and natural products are preferably selected as much as possible in consideration of use conditions.

After the components shown in 0007 to 0009 are made into a uniform mixed powder, the amount of water added to the mixed powder is 5 to 8 times, preferably 6 in order to make it a coated wall material having a good quality and easy to use viscosity. Double amount is good.

The wall material of the present invention is easy to apply, and maintains the original gel state immediately after application and stabilizes it. It is also characterized by its ability to easily and easily adjust its favorite color tone and enjoy interior decoration. Furthermore, all natural products such as short powdery plant fibers other than wood powder can be selected as the constituent components of the wall material, and a completely pollution-free wall material can be provided.

The wall material for hand coating and spray coating can be easily used depending on the application, and can be adjusted by adjusting the amount of water added. Hereinafter, the use example will be described in detail.

First, a mixed powder containing wood flour as a main component was prepared by sequentially adding the components shown in the following formulation and stirring and mixing. Subsequently, water 6 times as much as the mixed powder was added and kneaded to prepare a hand-painted wall material. The blending ratio of the mixed powder is as follows.

80% by weight of spruce wood flour (average particle size 350 μm), 10% by weight of pregelatinized wheat starch, 3% by weight of xanthan gum, 6% by weight of an inorganic bulking agent (calcium carbonate), and 1% by weight of an antifungal agent.

Artemisia powder (green, average particle size 250 μm) 80% by weight, pregelatinized wheat starch 10% by weight, xanthan gum 3% by weight, inorganic extender (calcium carbonate) 6% by weight, fungicide 1% by weight.

Similarly, for spray coating, the components shown in the following formulation were sequentially added and mixed by stirring to obtain a mixed powder mainly composed of wood flour. Subsequently, 7 times as much water as this mixed powder was added and kneaded to obtain an appropriate viscosity for spray coating. The blending ratio of the mixed powder is as follows.

80% by weight of colored spruce wood powder (average particle size 200 μm), 7% by weight of processed starch (commercial product for paste containing preservatives), 3% by weight of low molecular weight gelatin, 3% by weight of xanthan gum, inorganic filler (trade name: Nipsil VN3) 6% by weight, fungicide 1% by weight.

Claims (2)

Wood-based non-polluting interior paint wall material that can be spray-painted, containing substances that reduce viscosity resistance when external forces such as suppression and painting are applied. The main component is wood flour (50 to 90% by weight), adhesive and starch (10 to 20% by weight), and thickening polysaccharides (1 to 10% by weight) that induce a drop in the viscosity of the system when applied or sprayed. ), Other powdered interior coating materials prepared by thoroughly mixing pigments and preservatives. Furthermore, this raw material is kneaded with 4 to 8 times as much water to produce a coated wall material for interior use.