JP2022068934A - Corner cushion - Google Patents

Abstract

To provide a corner cushion that does not spoil the fine appearance of attached furniture or electrical appliance and the like.SOLUTION: A plasticizer, a stabilizer, a processing aid, and a lubricant are added to 100 pts.mass of polyvinyl chloride (PVC), and 0.2 to 0.3 pts.mass of a black pigment is added to obtain the corner cushion. As a result, the whole is colored black, and even if the polyvinyl chloride is yellowed due to deterioration by sunlight or the like, the yellowness is almost inconspicuous. Further, by using polyvinyl chloride, the surface thereof exhibits a moderate gloss, and the feeling of incompatibility with the feeling of the gloss of furniture or plastic electric appliance disappears and becomes less conspicuous, and the fine appearance is not spoiled.SELECTED DRAWING: Figure 1

Description

The present invention particularly relates to a corner cushion that is attached to the edges and corners (corners) of furniture, electric appliances, etc. to protect them.

In recent years, cushioning materials have been attached to the corners of factory sites, building entrances, carry-in entrances, elevator entrances, pillars, beams, etc. to prevent people or objects from colliding with them and causing injury or breakage. There are many cases. Most of this cushioning material is made of a resin material with excellent elasticity and impact resistance, such as sponge, polyurethane foam, polyethylene foam, and NBR foam rubber, and has various sizes depending on the place of use and purpose. Shapes, materials, and patterns are manufactured, sold, and used properly.

For example, as in Patent Documents 1 and 2 below, cushioning materials applied to construction sites, construction sites, parking lots, etc. are made of elastic materials such as foamed polyethylene and sponge, and their surfaces are covered with them. A soft sheet material with water resistance and flexibility such as a PVC sheet is provided, and a reflective sheet is attached to the surface of the sheet material, or the sheet material itself is made into a so-called tiger pattern to make it stand out as much as possible. Many have drawn attention to people and workers.

On the other hand, in the case of applying to industrial products that require not only functions but also aesthetics such as furniture and electrical appliances, the thickness is thin and such as polyvinyl chloride (PVC) so as not to impair the design and aesthetics as much as possible. There is also an increasing demand for cushioning materials that use transparent (clear) and inconspicuous resin materials.

Japanese Unexamined Patent Publication No. 2009-185526 Japanese Unexamined Patent Publication No. 2018-105062

However, although the cushioning material made of polyvinyl chloride (PVC) is in a clear transparent state immediately after production, its surface deteriorates and becomes yellow when exposed to sunlight (ultraviolet rays) or fluorescent light for a long period of time. This can greatly spoil the aesthetics of furniture and electrical appliances to which it is attached.

Therefore, an object of the present invention has been devised to solve these problems, and an object of the present invention is to provide a new corner cushion that does not spoil the aesthetics of attached furniture, electric appliances, and the like. ..

In order to solve the above problems, the present invention relates to 100 parts by mass of polyvinyl chloride (PVC), 70 to 90 parts by mass of a plasticizer, 2 to 5 parts by mass of a stabilizer, 1 to 3 parts by mass of a processing aid, and a lubricant. It is a corner cushion characterized by containing 0.5 to 2.0 parts by mass and containing 0.2 to 0.3 parts by mass of a black pigment.

By using the corner cushion of such a component, the whole is colored black, so that it is almost noticeable even if the polyvinyl chloride (PVC) is yellowed due to deterioration by sunlight (ultraviolet rays) or the light of a fluorescent lamp. It disappears. In addition, by using polyvinyl chloride (PVC), the surface of the surface exhibits an appropriate luster, so that the housings of electric appliances such as TVs and PC monitors, tablet terminals, and smartphones, which are mostly made of plastic, The glossiness and discomfort of the frame surface disappears and it becomes less noticeable, and its aesthetic appearance is not spoiled. Furthermore, by coloring it black, it is in harmony with the black plastic housing and frame, so that its presence and discomfort can be eliminated.

Here, the plasticizer blended in this polyvinyl chloride (PVC) imparts appropriate flexibility and elasticity as a shock absorbing material to polyvinyl chloride (PVC) which is hard as it is, and is mainly composed of an acid. A compound (ester) synthesized from alcohol is used. The reason why the blending amount is defined as 70 to 90 parts by mass with respect to 100 parts by mass of polyvinyl chloride (PVC) is that if it is less than 70 parts by mass, the flexibility as a cushioning material is poor, and conversely, it exceeds 90 parts by mass. This is because the cushioning material becomes too soft and the elasticity (impact resistance) of the cushioning material is lowered, preferably 75 to 85 parts by mass, and more preferably 80 to 82 parts by mass.

Examples of this plasticizer include phthalates (Phthalate), adipates (Adipate), trimellitic acid esters (Trimellitate), polyesters (Polyester), phosphoric acid esters (Phosphate), citric acid esters (Citrate), and the like. Known chemicals such as Sebacate, Azelaic acid ester, Maleic acid ester, and benzoic acid ester can be used. Further, as the acid, phthalic acid, trimellitic acid, adipic acid and the like can be used, and as the alcohol, octanol, isononanol, higher mixed alcohol and the like can be used.

Similarly, the stabilizer blended in this polyvinyl chloride (PVC) is for preventing the desorption of hydrogen chloride during heating and softening of PVC, which is the main raw material, and for suppressing the chain reaction of decomposition, for example. Use known chemical substances such as calcium-zinc-based stabilizers (Ca-Zn-based), barium-zinc-based stabilizers (Ba-Zn-based), tin-based stabilizers (Sn-based), and lead-based stabilizers (Pb-based). Can be done. The blending amount is defined as 2.0 to 6.0 parts by mass with respect to 100 parts by mass of polyvinyl chloride (PVC), but the effect is not sufficient if it is less than 2.0 parts by mass, and conversely, 6 This is because no further effect can be obtained even if the amount exceeds 0.0 parts by mass, preferably 3.0 to 5.0 parts by mass, and more preferably 4.0 to 4.5 parts by mass.

Then, in order to further enhance the functions of these stabilizers, a processing aid (pure organic processing aid) that does not contain a metal such as an epoxyplasticizer or a chelator is used. Epoxy plasticizers are very effective in improving heat resistance and light resistance as well as plasticizers, and are indispensable for Ba—Zn-based and Ca—Zn-based stabilizers. On the other hand, the chelator encloses the metal chloride secondarily generated by the reaction between the stabilizer and hydrogen chloride in a harmless form, and an organic phosphite compound or the like can be used. The blending amount is defined as 1.0 to 3.0 parts by mass with respect to 100 parts by mass of polyvinyl chloride (PVC), but the effect is not sufficient if it is less than 1.0 part by mass, and conversely, 3 This is because no further effect can be obtained even if it exceeds 0.0 parts by mass, and it is preferably 1.5 to 2.5 parts by mass, more preferably. It is 2.0 to 2.3 parts by mass.

Similarly, the lubricant blended in this polyvinyl chloride (PVC) reduces the friction between the PVC and the injection machine or the mold and the friction between the resin particles in injection molding, and the fluidity and separation of the PVC. It improves the shape and is effective in improving the processing efficiency and the appearance of the molded product. Some of them function as external lubricants and others have an effect on internal lubricants, and usually both can be used in combination.

Suitable lubricants are, for example, paraffin wax, synthetic polyethylene, liquid paraffin, stearic acid, behenic acid, 12 hydroxystearic acid, stearyl alcohol, stearic acid amide, oleic acid amide, erucic acid amide, methylene bisstearic acid amide. , Ethylene bisstearic acid amide, Ca stearic acid, Zn, Mg, Pb, glycerin monostearate, glycerin monooleate, butyl stearate and the like can be used. And, the reason why the compounding amount was defined as 0.5 to 2.0 parts by mass with respect to 100 parts by mass of polyvinyl chloride (PVC) is that the effect is not sufficient if it is less than 0.5 parts by mass, and conversely, 2 This is because no further effect can be obtained even if it exceeds 0.0 parts by mass, preferably 0.8 to 1.5 parts by mass, and more preferably 1.0 to 1.3 parts by mass.

Similarly, as a black pigment to be blended in this polyvinyl chloride (PVC), carbon black, which is commonly used as a colorant for resins, can be used. The blending amount is 0.2 to 0.3 parts by mass, preferably 0.23 to 0.28 parts by mass with respect to 100 parts by mass of polyvinyl chloride (PVC). Since polyvinyl chloride (PVC), which is the main component, and other compounding ingredients themselves are transparent resins, it is only possible to make transparent ones by simply processing them into an arbitrary shape with a molding machine, but adding pigments. The whole can be colored with any color.

That is, in the case of a pigment made of carbon black, the optimum blending amount is 200 to 300 g with respect to 100 kg of polyvinyl chloride (PVC), and the mass ratio thereof is 0.2 to 0.3 parts by mass of PVC. It can be colored in a beautiful black color with a unique luster. If it is less than 0.2 parts by mass, the color will be closer to gray than black, and the yellowing that develops with deterioration cannot be completely hidden. On the contrary, even if it is mixed in excess of 0.3 parts by mass, it will be. This is because not only the black color cannot be made darker than that, but also the glossiness peculiar to PVC is impaired.

Further, if a yellow pigment is used instead of the black pigment, the whole can be colored yellow. As the yellow pigment, a pigment made of titanium oxide and condensed azo, which is also commonly used as a resin colorant, can be used. When this yellow pigment is used, it is 0.10 to 0.25 parts by mass, more preferably 0.15 to 0.20 parts by mass with respect to 100 parts by mass of polyvinyl chloride (PVC).

That is, the optimum blending amount is 100 to 250 g with respect to 100 kg of polyvinyl chloride (PVC), and the mass ratio thereof is as small as 0.10 to 0.25 parts by mass with the luster peculiar to PVC. It can be colored in a beautiful yellow color. This is because if it is less than 0.10 parts by mass, the color becomes lightly yellowish and the same as the yellowing that develops with deterioration. On the contrary, even if it is mixed in excess of 0.25 parts by mass, it becomes more yellow. This is because not only is it impossible to make the color darker, but also the glossiness peculiar to PVC is impaired.

According to the present invention, since the whole is colored in an arbitrary color, it is hardly noticeable even if the polyvinyl chloride (PVC) is yellowed due to deterioration by sunlight (ultraviolet rays) or the light of a fluorescent lamp. In addition, by using polyvinyl chloride (PVC), the surface of the surface exhibits an appropriate luster, so that the housings of electric appliances such as TVs and PC monitors, tablet terminals, and smartphones, which are mostly made of plastic, The glossiness and discomfort of the frame surface disappears and it becomes less noticeable, and its aesthetic appearance is not spoiled. Furthermore, by coloring it in black or yellow, it harmonizes with the black or yellow housing or frame made of plastic, so that its presence or discomfort can be eliminated.

It is a perspective view which shows an example of the corner cushion 100 (three-legged cushion) which concerns on this invention. It is a perspective view which shows an example of the corner cushion 200 (L-shaped cushion) which concerns on this invention. It is a perspective view which shows an example of the corner cushion 300 (long cushion with an L-shaped cross section) which concerns on this invention. It is a perspective view which shows an example of the corner cushion 400 (long cushion with a C-shaped cross section) which concerns on this invention. It is a chart showing Examples 1 to 3 and Comparative Examples 1 to 4 of a sample using a black pigment. It is a chart showing Examples 4 to 6 and Comparative Examples 5 and 6 of a sample using a yellow pigment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 4 show an embodiment of the corner cushions 100 to 400 according to the present invention. First, FIG. 1 is a corner cushion 100, which is a so-called three-legged cushion, and has an L-shaped cross section covering each of three sides extending in the X-axis, Y-axis, and Z-axis directions around one corner of a cube. It is in the form of having protective pieces 110, 110, 110. Further, FIG. 2 is a corner cushion 200, which is a so-called L-shaped cushion or the like, and has a form having L-shaped protective pieces 210, 210 having an L-shaped cross section covering two sides extending in the X-axis and Y-axis directions, respectively. , Practically the most versatile.

FIG. 3 is a long corner cushion 300 having an L-shaped cross section, which is attached to a corner of a desk or table top plate or an outer frame of a television and functions to protect them. Further, FIG. 4 is an elongated corner cushion 300 having a C-shaped cross section, which is attached along, for example, the door edge of a car or the outer edge of a plate-like body and functions to protect them. Then, these corner cushions 100 to 400 are firmly attached to each part so as not to fall off by the double-sided tape or the adhesive provided inside the corner cushions 100 to 400.

The corner cushions 100 to 400 according to the present invention having such a form contain polyvinyl chloride (PVC) as a main component, and an appropriate amount of a plasticizer, a stabilizer, a processing aid, a lubricant, and an arbitrary color are used. Consists of the pigments of. The surface of the corner cushions 100 to 400 reflects light to give them a glossy luster, and the entire surface is colored black or yellow, so that not only the function but also the design is particularly good. When applied to priority furniture, electrical appliances, etc., the function as a cushioning material can be maintained for a long period of time without spoiling their aesthetic appearance. Hereinafter, examples and comparative examples of the corner cushions 100 to 400 according to the present invention will be described.

(Examples 1 to 3)
As shown in Table 1 of FIG. 5, 72 parts by mass of phthalate ester as a plasticizer and calcium-zinc-based stabilizer (Ca—Zn-based) as a stabilizer with respect to 100 parts by mass of powdered polyvinyl chloride (PVC). ) By 3.8 parts by mass, pure organic processing aid by 2.2 parts by mass as a processing aid, and paraffin wax by 1.0 parts by mass as a lubricant, and carbon black as a black pigment is 0 in each. After blending .25 parts by mass (Example 1), 0.20 parts by mass (Example 2), and 0.30 parts by mass (Example 3), these are kneaded with a processing machine such as a henschel type mixer or a ribbon blender. Three types of compounds (samples) were prepared. Since these samples still contain some water, they are dried for several tens of minutes to several hours, and then each of these samples is placed in an extrusion molding machine and heat-melted while being injection-molded into a mold. A sample (corner cushion) having the form shown in FIG. 1 was prepared.

(Evaluation methods)
Then, the color, gloss, and elasticity of each sample prepared in this way were evaluated. As these evaluation methods, each freshly completed sample was placed near a window in a room where natural light (sunlight) shines, left as it was for 3 weeks, and then each sample was compared with each freshly completed sample. As a method for evaluating elasticity, a deformed state (self-restoring force) after a 10 kg weight was loaded for 10 minutes was confirmed.

(Evaluation results)
As a result, there was almost no change in the color and gloss of each of the samples of Examples 1 to 3 as far as they were visually confirmed. In particular, the sample of Example 1 containing 0.25 parts by mass of carbon black did not change so much that it was completely indistinguishable from the newly completed sample. As for elasticity, about 30 minutes after removing the weight, each sample naturally returned to its original shape, and there was almost no effect on the performance as a cushioning material.

(Comparative Examples 1 and 2)
As shown in Table 1 of FIG. 5, two types of samples having the same components and blending amounts as in Example 1 except for the blending amount of carbon black, which is a black pigment, were produced, and each sample was evaluated in the same manner as in Example 1. Was done. As a result, in Comparative Example 1 in which the blending amount of carbon black was smaller than the default value of the present invention, although the gloss and elasticity were good, the color was too light and yellowing was conspicuous, and the hue was clearly changed. It was observed. Further, Comparative Example 2 in which the blending amount of carbon black was larger than the default value of the present invention was inferior to that in Example 1 in terms of both hue and gloss.

(Comparative Examples 3 and 4)
As shown in Table 1 of FIG. 5, two types of samples having the same components and blending amounts as in Example 1 were produced except for the blending amount of the plasticizer, and each sample was subjected to the same evaluation test as in Example 1. .. In Comparative Example 3 in which the blending amount of the plasticizer was smaller than the default value of the present invention, the color tone and glossiness were reasonable, but the overall hardness was high and the elasticity was poor. Further, in Comparative Example 4 in which the blending amount of the plasticizer was larger than the default value of the present invention, the glossiness and elasticity were inferior to those in Example 1.

(Examples 4 to 6)
As shown in Table 2 of FIG. 6, three types of samples having the same components and blending amounts as in Example 1 were produced except that a yellow pigment (titanium oxide + condensed azo) was used instead of carbon black as the pigment to be blended. , Each sample was subjected to the same evaluation test as described above. As a result, in Example 4 in which 0.17 parts by mass of the yellow pigment was used, the color, glossiness, and elasticity were all very good. In addition, good results were obtained for both the sample of Example 5 having 0.10 parts by mass of yellow pigment slightly less than this and the sample of Example 6 having 0.25 parts by mass of yellow pigment slightly more than this. ..

(Comparative Examples 5 and 6)
As shown in Table 2 of FIG. 6, two types of samples having the same components and blending amounts as in Example 4 except for the blending amount of the yellow pigment (titanium oxide + condensed azo) were produced, and each sample was the same as in Example 1. Evaluation test was conducted. As a result, in Comparative Example 5 in which the blending amount of the yellow pigment was smaller than the default value of the present invention, although the glossiness and elasticity were good, the color was too light and the whole was yellowish. Even though it was just manufactured, it turned yellowish due to deterioration. Further, Comparative Example 6 in which the blending amount of the yellow pigment was larger than the default value of the present invention was inferior to that in Example 4 in terms of both hue and gloss.

100 ... Corner cushion (three-legged cushion)
110 ... Protective piece 200 ... Corner cushion (L-shaped cushion)
210 ... Protective piece 300 ... Corner cushion (long cushion with L-shaped cross section)
400 ... Corner cushion (C-shaped long cushion)

Claims (2)

Contains 70 to 90 parts by mass of plasticizer, 2 to 5 parts by mass of stabilizer, 1 to 3 parts by mass of processing aid, and 0.5 to 2.0 parts by mass of lubricant with respect to 100 parts by mass of polyvinyl chloride (PVC). A corner cushion characterized by containing 0.2 to 0.3 parts by mass of a black pigment. Contains 70 to 90 parts by mass of plasticizer, 2 to 5 parts by mass of stabilizer, 1 to 3 parts by mass of processing aid, and 0.5 to 2.0 parts by mass of lubricant with respect to 100 parts by mass of polyvinyl chloride (PVC). A corner cushion comprising 0.10 to 0.25 parts by mass of a yellow pigment.

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