Pulp Molding

Abstract

To provide a pulp molded product having high reflectance and capable of efficiently diffusing light. The present invention relates to a pulp molded article, which has a total light reflectance of 50% or more at a wavelength of 555 nm.

Description

[Technical field]

[0001] The present invention relates to a pulp molded article. [Background technology]

[0002] In recent years, marine pollution caused by plastic waste has become a problem, and there is a demand for plastic-free products. For example, there is a demand for paper products, such as cardboard shelves and tables in furniture, due to their ease of disposal. Among paper products, pulp molded products in particular have excellent moldability and are environmentally friendly. Summary of the Invention [Problem to be solved by the invention]

[0003] Pulp molded products have been conventionally used as packages and cushioning materials, but are also being considered for use in various other applications. The present inventors have focused on the fact that pulp molded products can change the direction of light to brightly illuminate a room, and can function as a reflective member such as a lampshade, and have discovered that in order for a pulp molded product to function satisfactorily as a reflective member, it is preferable that the total light reflectance is equal to or greater than a predetermined value.

[0004] An object of the present invention is to provide a pulp molded article having high reflectance and capable of diffusing light efficiently. [Means for solving the problem]

[0005] The pulp molded article according to the present invention has the following features. <1> ~ <7> It has the following configuration. <1> A pulp molded product having a total light reflectance of 50% or more at a wavelength of 555 nm. <2> It is characterized by having a diffuse reflectance of 50% or more at a wavelength of 555 nm. <1> The pulp molded article according to claim 1. <3> Characterized by a total light transmittance of 1.0% or more at a wavelength of 555 nm <1> The pulp molded article according to claim 1. <4> Density 0.45g / cm 3 More than 1.0g / cm 3 Characterized in that <1> The pulp molded article according to claim 1. <5> The thickness is 500 μm or more and 1500 μm or less. <1> The pulp molded article according to claim 1. <6> The pulp blend ratio (LBKP / NBKP) of softwood bleached kraft pulp (NBKP) to hardwood bleached kraft pulp (LBKP) is 30 / 70 or more and 100 / 0 or less. <1> The pulp molded article according to claim 1. <7> <1> ~ <6> The pulp molded article according to any one of the above items is a reflective member for lighting, and is a lampshade. Effect of the Invention

[0006] The pulp molded product according to the present invention has a high reflectance when used as a reflective member, making it possible to reflect light efficiently. In addition, since it is made of paper, it can be disposed of or recycled in an environmentally friendly manner. [Brief description of the drawings]

[0007] [Figure 1] 1 is a perspective view of a ceiling lighting fixture using a reflective member according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a side view of the ceiling lighting fixture shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described in detail with reference to Figures 1 and 2. However, the present invention is not limited to this embodiment.

[0009] In this specification and the claims, a "pulp molded body" is a body made of pulp, and a "reflective member" includes, for example, a lampshade, a reflector, or other device that reflects light.

[0010] Hereinafter, a description will be given of an embodiment in which the pulp molded article is used as a lampshade, which is an example of a reflecting member (for lighting). [structure] Fig. 1 is a perspective view of a ceiling lighting fixture 1 using a reflective member 2 according to one embodiment of the present invention, and Fig. 2 is a side view of the ceiling lighting fixture 1 shown in Fig. 1. For ease of explanation, in Fig. 2, the reflective member 2 is cut away to make the lamp 4 and the cord 3 visible.

[0011] The reflective member (hereinafter also referred to as "lampshade") 2 according to this embodiment is a pulp molded body, and is used in a ceiling lighting fixture 1, as shown in Figs. 1 and 2. The ceiling lighting fixture 1 includes a plug 5 for supplying power from a power source on the ceiling, a cord 3 for supplying power from the plug 5 to a lamp (e.g., an LED lamp) 4, the lamp 4, and an umbrella-shaped lampshade 2 for reflecting and diffusing light projected from the lamp 4. The lampshade 2 is configured to cover the lamp 4 from above, and has a hole in the center through which the cord 3 passes. The present invention is not limited to hanging from the ceiling, and can also be used, for example, as a lamp shade for a lamp placed on a stand.

[0012] The lampshade 2 has a dome-like shape with a circular periphery as shown in Figures 1 and 2. However, this is not limited to the present invention, and the lampshade may be cone-like, or the shape can be set according to the type of lamp, light directionality, luminous flux, luminous intensity, brightness, illuminance, etc. For example, in the case of a rod-shaped lamp (e.g., a fluorescent lamp), the lampshade may be shaped like a long, thin umbrella.

[0013] In the present invention, in order to obtain the effects of the invention, it is preferable that the pulp molded article has a total light reflectance of 50% or more at a wavelength of 555 nm.

[0014] According to this configuration, when the pulp molded body is used as a reflective member, the reflectance is high, so it is possible to reflect light efficiently. In addition, since it is made of paper, it can be disposed of or recycled in an environmentally friendly manner. Here, the total light reflectance can be said to contribute to brightness (returning light).

[0015] This configuration also makes it possible to increase the efficiency of use of the light source (the lamp in this embodiment). The total light reflectance can be adjusted by changing the thickness, density, and surface roughness of the pulp molded body. The surface roughness can be adjusted by changing the pulp composition, etc.

[0016] Although a design is shown in Figure 1, the total light reflectance (and the diffuse reflectance and total light transmittance described below) mentioned here are for a plain product. The pulp molded product is preferably white, but it is also possible to add a design to it, as described below.

[0017] In the present invention, in order to obtain the effects of the invention, it is preferable that the pulp molded article has a diffuse reflectance of 50% or more at a wavelength of 555 nm.

[0018] This configuration makes it possible to diffuse highly directional light to produce soft light, which is even, gentle on the eyes, and natural, with a warm atmosphere. The diffuse reflectance can be adjusted by changing the thickness, density, surface roughness, etc. of the pulp molded body. Here, the diffuse reflectance can be said to contribute to the unevenness (uniformity) of the light.

[0019] The lampshade 2 according to this embodiment is capable of transmitting light from the inside. As shown in Fig. 1, the lampshade 2 has a floral design on the inside, and while reflecting light projected from the lamp 4 on the inside, transmits the light toward the outside, allowing the internal design to stand out on the outside.

[0020] In the present invention, in order to obtain the effects of the invention, it is preferable that the pulp molded article has a total light transmittance of 1.0% or more at a wavelength of 555 nm.

[0021] With this configuration, light is transmitted through the lampshade, making the lampshade brighter, improving its aesthetic appearance, providing design, and creating a warm and atmospheric light, thereby improving the atmosphere of the room. The total light transmittance can be adjusted by changing the thickness and density of the pulp molded body, etc.

[0022] In the present invention, the upper limit of the total light transmittance at a wavelength of 555 nm for the pulp molded body is preferably 50% or less, more preferably 30% or less, and even more preferably 2% or less, in order to obtain sufficient brightness at hand or in the room when using a lampshade (or to reduce the light that passes through the lampshade and increase the efficiency of the light source).

[0023] The inventors have discovered a pulp molded product suitable for use as a reflective member (lamp shade) by optimizing the materials and physical properties. [Method of measuring optical properties] As optical properties, the total light reflectance spectrum, diffuse reflectance spectrum, and total light transmittance spectrum were measured in the wavelength range of 300 to 850 nm including visible light using a UV-Visible Near-Infrared Spectrophotometer V-770 (manufactured by JASCO Corporation). As a representative, values ​​at a wavelength of 555 nm, which is near the peak of sensitivity of the human eye to brightness, were used as the total light reflectance, diffuse reflectance, and total light transmittance. For the measurements, an integrating sphere with a diameter of 60 mm was used, and a Spectralon was used as the standard white plate. The data acquisition interval was 1 nm, and the bandwidth was set to 2 nm for UV / Visible and 8 nm for Near-Infrared. Each measured value is the average value of measurements taken at three designated points on the pulp molded product.

[0024] The raw materials and manufacturing method of the pulp molded article according to this embodiment will be described below. [Pulp raw materials] Examples of the pulp raw material for the pulp molded body include wood pulp, non-wood pulp, and waste paper, with wood pulp and non-wood pulp being preferred, and the pulp raw material here is the pulp that constitutes the pulp molded body.

[0025] Examples of wood pulp include wood pulp that is generally used for papermaking purposes, and depending on the preparation method, it is classified into chemical pulps such as kraft pulp (KP), sulfite pulp (SP), and soda pulp (AP); semi-chemical pulps such as semi-chemical pulp (SCP) and chemi-ground wood pulp (CGP); and mechanical pulps such as groundwood pulp (GP), thermomechanical pulp (TMP, BCTMP), and refiner ground wood pulp (RGP); and the like.

[0026] Examples of wood pulp include coniferous pulp and hardwood pulp, depending on the raw material. Examples of coniferous pulp include pulp obtained from the fir and pine genus. Examples of hardwood pulp include pulp obtained from the acacia, eucalyptus, and poplar genus.

[0027] Among these, as wood pulp, bleached softwood kraft pulp (NBKP) and bleached hardwood kraft pulp (LBKP) are more preferable.

[0028] In the present invention, in order to achieve the effects of the present invention, it is preferable that the pulp blend ratio (LBKP / NBKP) of softwood bleached kraft pulp (NBKP) to hardwood bleached kraft pulp (LBKP) in the wood pulp constituting the pulp molded body is 30 / 70 or more and 100 / 0 or less. By setting the pulp blend ratio within this range, smoothness and dispersibility are improved. The pulp blend ratio affects reflectance, transmittance, and absorptance. From the viewpoint of the surface properties of the product, a higher LBKP is more preferable.

[0029] In the present embodiment, the hardwood pulp is preferably a wood pulp of the genus Acacia or the genus Eucalyptus from the viewpoint of the smoothness of the obtained pulp molded body. One type of hardwood pulp may be used alone, or two or more types may be used in combination.

[0030] In this embodiment, by containing coniferous pulp as the pulp raw material, a pulp molded product having superior strength and oil resistance can be obtained. As the coniferous pulp, in terms of strength and oil resistance, coniferous pulp of the genus Pinus is preferable, and radiata pine is more preferable, which is suitable for a lampshade for a kitchen. One type of coniferous pulp may be used alone, or two or more types may be used in combination.

[0031] When the pulp raw material is a mixed pulp of wood pulp and non-wood pulp, the content of wood pulp in the pulp raw material is, from the viewpoint of further improving the surface smoothness and oil resistance of the pulp molding, preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, even more preferably 20% by mass or more, even more preferably 45% by mass or more, and preferably 95% by mass or less, more preferably 90% by mass or less, even more preferably 80% by mass or less, and even more preferably 55% by mass or less.

[0032] Non-wood pulp is fiber obtained from the bark, stems, leaves, and leaf sheaths of plants.Specific examples include pulp obtained from cotton linters, cotton, linen, hemp, ramie, straw, esparto, Manila hemp, sisal, jute, flax, kenaf, bamboo, bagasse, ganpi, mitsumata, kozo, and mulberry.

[0033] From the viewpoint of improving the oil resistance of the pulp molded body, the non-wood pulp preferably contains at least one selected from bagasse and bamboo, more preferably at least one selected from bagasse and bamboo, and even more preferably bagasse.

[0034] When the pulp raw material is a mixed pulp of wood pulp and non-wood pulp, the content of non-wood pulp in the pulp raw material is, from the viewpoint of further improving the surface smoothness and oil resistance of the pulp molded body, preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 20% by mass or more, even more preferably 45% by mass or more, and preferably 95% by mass or less, more preferably 90% by mass or less, even more preferably 85% by mass or less, even more preferably 80% by mass or less, and even more preferably 55% by mass or less.

[0035] In this embodiment, the pulp raw material is preferably composed mainly of virgin pulp. By using virgin pulp as the main component, a pulp molded body having excellent surface smoothness can be obtained. Note that "composed mainly of virgin pulp" means that the content of virgin pulp in the pulp raw material is preferably 80% by mass or more, more preferably 85% by mass or more, even more preferably 90% by mass or more, still more preferably 95% by mass or more, and 100% by mass or less, still more preferably 100% by mass.

[0036] The virgin pulp is not particularly limited, but for example, bleached pulp and semi-bleached pulp are preferable.

[0037] Unbleached pulp tends to have a high residual amount of lignin, low whiteness, and high total light absorption, which leads to a decrease in reflectance and poor decorativeness. Therefore, the content of unbleached pulp in the pulp raw material is preferably 20% by mass or less, more preferably 10% by mass or less, even more preferably 5% by mass or less, and even more preferably none (0% by mass).

[0038] On the other hand, in applications requiring strength, inconspicuous stains, a natural texture, etc., it is preferable to use unbleached pulp. In this case, the content of unbleached pulp in the pulp raw material is preferably more than 20% by mass, more preferably 50% by mass or more, and even more preferably 80% by mass or more (upper limit 100% by mass). In this case, at least one of bleached pulp and semi-bleached pulp may be used in combination with unbleached pulp.

[0039] Furthermore, when mercerized pulp or crosslinked pulp is contained as a pulp raw material, the strength or density of the pulp molded body tends to decrease. Therefore, the content of mercerized pulp and crosslinked pulp in the pulp raw material is preferably 20% by mass or less, more preferably 10% by mass or less, even more preferably 5% by mass or less, and even more preferably none (0% by mass).

[0040] Waste paper pulp tends to have a large amount of residual ink and poor dispersibility. In addition, waste paper fibers tend to be frayed and deformed. In addition, waste paper pulp has low whiteness, and the total light absorption rate increases, which leads to a decrease in reflectance, and there are undeinked fibers that look black and long with ink remaining on the pulp fibers, which tends to cause black whiskers. In addition, dust can be seen due to the presence of vinyl that looks gray and black spots remaining. As a result, the appearance and surface smoothness of the obtained pulp molded product tend to decrease, so the content of waste paper pulp in the pulp raw material is preferably 20% by mass or less, more preferably 10% by mass or less, even more preferably 5% by mass or less, and even more preferably no content (0% by mass).

[0041] In this embodiment, the Canadian Standard Freeness (CSF) of the pulp raw material is preferably 100 mL or more, more preferably 150 mL or more, and even more preferably 200 mL or more from the viewpoint of the productivity of the pulp raw material and the papermaking property during the production of the pulp molded body, and is preferably 600 mL or less, more preferably 520 mL or less, even more preferably 450 mL or less, even more preferably 400 mL or less, and even more preferably 300 mL or less from the viewpoint of surface smoothness. If the CSF is higher than 600 mL, the surface property may be deteriorated.

[0042] As for CSF, it becomes transparent as beating progresses, i.e., its opacity decreases. CSF affects reflectance, transmittance, and absorptance.

[0043] The degree of beating may be adjusted so that the CSF falls within the above range.

[0044] CSF is measured in accordance with JIS P 8121-2:2012. For bleached pulp, white is preferred because of its high reflectance. In the present invention, in order to achieve the effects of the present invention, the kappa number of the pulp molded product is preferably 1 to 20. [Other ingredients] The pulp molded body is formed using the above-mentioned pulp as a main raw material. The pulp molded body may be formed from 100% pulp, but may also be formed by blending other components such as various internal additives in addition to pulp.

[0045] Examples of other components include inorganic substances such as talc and kaolin, inorganic fibers such as glass fiber and carbon fiber, synthetic resin powder or fiber such as polyolefin, polysaccharides such as carboxymethylcellulose, sizing agents, wet strength agents, dry strength agents, oil-resistant agents, retention agents, drainage improvers, bulking agents, aluminum sulfate, pH adjusters, pitch control agents, slime control agents, colorants such as pigments, etc. It is preferable to contain a sizing agent as another component.

[0046] Examples of sizing agents include rosin-based sizing agents (for example, acidic rosin-based sizing agents and neutral rosin-based sizing agents), alkyl ketene dimers, alkenyl succinic anhydrides, and styrene-containing polymers such as styrene-(meth)acrylate copolymers, with alkyl ketene dimers being preferred.

[0047] Examples of wet strength agents for internal addition include polyamidoamine-epichlorohydrin resin, epoxidized polyamidopolyamine, dialdehyde starch, urea formaldehyde resin, melamine-formaldehyde, polyacrylamide, methylolated polyacrylamide, polyethyleneimine, etc.

[0048] Examples of water repellents include wax emulsions, metal soaps (alkali salts of sodium, potassium, zinc, lithium, magnesium, etc.), fatty acid chromium complex salts (myristic complex salts, stearic acid chromic chloride complex salts, etc.), zirconium water repellents, silicone emulsions, etc.

[0049] In the case where the pulp molded product according to the present embodiment contains non-wood pulp, it is possible to improve the oil resistance using only the pulp raw material, and therefore it is possible to obtain sufficient oil resistance even if the amount of the wet strength agent and water repellent agent added is reduced or not added at all. Note that this does not exclude the addition of a wet strength agent or water repellent agent in order to obtain higher oil resistance and water resistance. [density] In the present invention, in order to obtain the effects of the invention, the density of the pulp molded body is 0.45 g / cm 3 More than 1.0g / cm 3 It is preferable that:

[0050] In addition, the density of the pulp molded body is preferably 0.50 g / cm from the viewpoint of further improving the surface smoothness and oil resistance. 3 More preferably, 0.60 g / cm 3 More preferably, it is 0.95 g / cm or more. 3 The following is the result.

[0051] The density of the pulp molded body can be measured according to JIS P 8118:2014. JIS P 8118:2014 is a method used for paper and paperboard, and in this embodiment, the size of the sample may not be as specified. In that case, the sample size is appropriately adjusted for measurement. The basis weight is measured according to JIS P 8124:2011, and the adjustment of the sample size is also the same as above. The flat part of the molded body is used for the measurement.

[0052] A certain degree of basis weight is preferable, as the transmittance decreases (opacity increases) and the reflectance improves.

[0053] In the present invention, in order to obtain the effects of the present invention, the pulp molded body has a basis weight of 1500 kg / m 2 The lower limit of the basis weight is preferably 200 kg / m 2 It is.

[0054] The pulp molded body may be made of multiple layers by performing the papermaking process described below multiple times or by hot pressing multiple molded intermediates in a hot pressing process, but from the viewpoint of superior surface smoothness and oil resistance, a single layer structure is preferred. Thickness The present inventors have discovered that in order to obtain the effects of the present invention, the thickness of the pulp molded article is preferably 500 μm or more and 1500 μm or less. [Fiber length] In the present invention, in order to obtain the effects of the present invention, it is preferable that the average fiber length in the pulp molded product is 0.5 mm or more and 1.0 mm or less. By keeping the fiber length within this range, the texture and dispersibility of the pulp are improved (flocks are reduced). The fiber length affects the reflectance, transmittance, and absorptance. Short fibers are preferable. [Manufacturing method of pulp molded body] The method for producing the pulp molded article is not particularly limited, but it is preferable to produce the article by a method having the following steps 1 to 3 in this order. The pulp molded article obtained by this method has excellent surface smoothness, so it can be decorated, has excellent cosmetic properties, and can be easily surface-treated. The decoration method is not particularly limited, and it may be painted with watercolor paints or the like.

[0055] Step 1: Preparing a pulp suspension Process 2: The process of papermaking in which the pulp suspension is passed through a papermaking mold to obtain a molded intermediate. Step 3: A hot pressing step of sandwiching the mold intermediate body between a first press die and a second press die and hot pressing the mold intermediate.

[0056] In step 1, a pulp suspension (pulp slurry) is prepared by adding a pulp raw material and, if necessary, other components to water. From the viewpoints of surface smoothness, dimensional stability, and productivity, the concentration of the suspension (slurry concentration) is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and even more preferably 0.5% by mass or more, and is preferably 7% by mass or less, more preferably 5% by mass or less, and even more preferably 3% by mass or less.

[0057] Step 2 is a papermaking step in which pulp is papered from a pulp suspension through a papermaking mold.

[0058] A forming die, such as a wire mesh die with a vacuum-drawn water-permeable structure, is immersed in the pulp suspension, and the pulp suspension is sucked into the forming die to expel the water, while at the same time the pulp fibers are laminated and adsorbed onto the die to form a three-dimensional wet paper. The forming die is then lifted out of the pulp suspension, and the water-absorbed three-dimensional wet paper is subjected to suction dehydration or pressure dehydration.

[0059] At this time, while continuing to apply vacuum suction to the molding die with the pulp laminated and adsorbed to its surface, a release device with vacuum suction is brought close to the pulp adsorption surface, and the pulp mold intermediate is dehydrated by compressed vacuum suction. After that, the vacuum pressure of the molding die is reduced to zero, and the release device is pulled back with the pulp mold intermediate still adsorbed to the release die, and the die is released.

[0060] Step 3 is a hot pressing step in which the mold intermediate obtained after the paper-making step is hot-pressed with a first press die and a second press die positioned in the opposite direction to the first press die while being heated.

[0061] In step 3, the dehydrated pulp mold intermediate obtained in step 2 is transferred to a first press die for hot pressing, which is made of, for example, a porous die. The pulp mold intermediate transferred to the first press die is sandwiched between the first press die and a second press die for hot pressing, which is positioned in the opposite direction to the first press die and engages with the first press die, and is heated and pressurized to obtain a predetermined pulp molded body.

[0062] It is preferable that at least one of the first press die and the second press die for hot pressing has an electric heater built therein, thereby heating at least one of the first press die and the second press die. Also, the entire die including the first press die and the second press die may be housed in a furnace into which hot air is introduced, so that hot air passes through the inside of the die.

[0063] In step 3 (hot pressing step), the pressure during pressing with the first press die and the second press die is preferably 0.1 MPa·s or more, more preferably 0.3 MPa or more, even more preferably 0.4 MPa·s or more, and still more preferably 0.6 MPa or more, from the viewpoint of obtaining a pulp molded body with excellent surface smoothness, and is preferably 3.0 MPa·s or less, more preferably 2.0 MPa or less, and even more preferably 1.5 MPa·s or less, from the viewpoint of power consumption and equipment load.

[0064] In step 3 (hot pressing step), the temperature during hot pressing is preferably 130°C or higher, more preferably 150°C or higher, and even more preferably 170°C or higher, from the viewpoints of obtaining a pulp molded body with excellent surface smoothness, and is preferably 280°C or lower, more preferably 250°C or lower, and even more preferably 230°C or lower, from the viewpoints of power consumption, equipment load, and suppression of discoloration.

[0065] In the above process, pulp molding with excellent smoothness is performed on both sides, but the present invention also allows an embodiment in which it is performed on only one side. In the pulp molding, for example, a fine mesh can be formed on the surface. [evaluation] The following Table 1 shows the pulp blend (LBKP to NBKP) (%), CSF (mL), hot press process (yes / no), thickness (μm), and density (g / cm3) for each example and comparative example. 3 ), surface roughness (average roughness Sa (μm)), surface roughness (maximum height difference Sz (μm)), total light reflectance (%), diffuse reflectance (%), and total light transmittance (%) at a wavelength of 555 nm.

[0066] For the evaluation of reflection and transmission (including measurements of total light reflectance, diffuse reflectance, and total light transmittance), a lampshade was attached and the lighting of the lampshade near the light source was evaluated in a dark room.

[0067] [Table 1]

[0068] In Comparative Example 1, at a wavelength of 555 nm, the total light reflectance is 43.6%, the diffuse reflectance is 39.9%, and the total light transmittance is 0.0%.

[0069] Comparative Example 1 has a lower reflectance than Examples 1 to 5, and therefore cannot diffuse light sufficiently. Also, Comparative Example 1 cannot transmit light sufficiently compared to Examples 1 to 5, and therefore cannot be expected to be effective as a lighting fixture. Comparative Example 1 has low "total light reflectance" and "diffuse reflectance", is dark and has uneven brightness, and is not suitable as a lampshade.

[0070] For example, in Example 5, the entire lampshade near the light source became moderately bright, the design of the lampshade improved, and the atmosphere of the room improved. However, in the case of Comparative Example 1, where the total light transmittance was 1.0 or less, the lampshade was dark and no change was observed in the design, so it did not contribute to improving the design of the lampshade. [others] The present invention is not limited to the above-described embodiments or the modified examples described throughout the specification, and appropriate changes and modifications can be made without departing from the technical concept of the present invention. [Explanation of symbols]

[0071] 1 Lighting equipment 2 Reflective material (lamp shade) 3. Code 4 Lamp 5 Plug

Claims

1. The total light reflectance at a wavelength of 555 nm is 50% or more, A pulp molded product having a thickness of 500 μm or more and 1500 μm or less.

2. 2. The pulp molded article according to claim 1, which has a diffuse reflectance of 50% or more at a wavelength of 555 nm.

3. 2. The pulp molded article according to claim 1, which has a total light transmittance of 1.0% or more at a wavelength of 555 nm.

4. Density is 0.45 g / cm 3 1.0g / cm or more 3 2. The pulp molded article according to claim 1, wherein:

5. 2. The pulp molded article according to claim 1, characterized in that the pulp blend (LBKP / NBKP) of softwood bleached kraft pulp (NBKP) to hardwood bleached kraft pulp (LBKP) is 30 / 70 or more and 100 / 0 or less.

6. The pulp molded article according to any one of claims 1 to 5 is a reflective member for lighting, and is a lampshade.

7. 7. The lampshade according to claim 6, the surface of which can be painted with watercolors or the like.

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