JP2016135226A - Flame retardant cubic lattice shape cushion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flame retardant cubic lattice shape cushion that has superior mechanical properties such as moderate softness and compressibility necessary as a cushion, vibration absorption, dehumidification properties, deformation followability and anti-settling property, while including sufficient flame resistance.SOLUTION: A flame retardant cubic lattice shape cushion is characterized by the cubic lattice shape cushion with a honeycomb shape structure comprising viscoelastic elastomer compound, having a thickness decreasing rate of 5.0% or less in a repeated compression residual strain test (based on JIS K-6400-4:2004 B method) and being a multiple polygonal aggregate by a consecutive lattice wall, and forming a lattice body having at least an upper part opened. The viscoelastic elastomer compound contains oil, a styrene block copolymer, bromine flame retardants and an antimony trioxide.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flame-retardant three-dimensional lattice cushion used for a seat, a bed, and the like.

  In addition to the function of supporting and holding a human weight, a cushion used for a seat or a bed is required to be comfortable. A comfortable cushion is required to have moderate softness and compressibility, vibration absorption, dehumidification, deformation follow-up and no sag as mechanical properties. Furthermore, when these cushions are used as vehicle seats, it is necessary to place importance on safety in the event of a fire, and a flame-retardant function is also required.

  Patent Document 1 discloses a molded body having mechanical characteristics that require the cushion. According to the patent document 1, since the built-in bulge has the action element, the mechanical characteristics can be improved. However, the mechanical characteristics are sufficiently used as a cushion for a seat, a bed, and the like. I was not satisfied.

  Therefore, as a cushion having further improved mechanical characteristics, a structure in which partition walls are juxtaposed in a lattice shape as in Patent Document 2 has been developed.

  Furthermore, Patent Document 3 discloses a cushion having excellent mechanical characteristics that has both durability and followability by making the structure different between the upper layer portion and the lower layer portion.

JP-T-2001-514911 Japanese Utility Model Publication No. 52-15307 Utility Model Registration No. 3140168

  However, in the above-mentioned patent document, it has not been studied to impart flame retardancy to a cushion used for a seat, a bed or the like, and it has a sufficient flame retardancy function while maintaining the mechanical characteristics necessary for the cushion. There was no cushion. Therefore, the present invention has excellent mechanical properties such as moderate softness and compressibility, vibration absorption, dehumidification, deformation followability and no sag required as a cushion while having sufficient flame retardancy. It is an object to provide a flame retardant solid lattice-shaped cushion.

  The inventors of the present invention have intensively studied to solve the above problems. As a result, the present inventors have found that by using a specific viscoelastic elastomer compound in a cushion having a specific structure, both sufficient flame retardancy and mechanical properties as a cushion can be achieved. That is, the present invention is as follows.

The present invention
[1] In a repeated compression residual strain test (conforming to JIS K-6400-4: 2004 B method) comprising a viscoelastic elastomer compound, the thickness reduction rate is 5.0% or less, and a plurality of continuous lattice walls are used. It is a three-dimensional lattice-shaped cushion having a honeycomb-shaped structure which is a square aggregate, and at least a lattice body having an open top is formed,
A flame-retardant three-dimensional lattice-shaped cushion, wherein the viscoelastic elastomer compound contains oil, a styrene-based thermoplastic elastomer, a bromine-based flame retardant, and antimony trioxide.
[2] A honeycomb-shaped structure that is an aggregate of a plurality of polygons by continuous lattice walls, forming a lattice body that is open at least upward, and compressibility between an upper layer portion and a lower layer portion of the lattice body, The bendability and buckling property are set differently, and the lower layer portion has a + shape in a polygonal shape of the honeycomb-shaped structure constituting the lattice body, the planar shape having a height lower than the lattice wall height from the bottom portion. A three-dimensional lattice-shaped cushion made of a viscoelastic elastomer compound, in which both ends of the rib are integrally formed on the inner wall of the lattice wall,
A flame-retardant three-dimensional lattice-shaped cushion, wherein the viscoelastic elastomer compound contains oil, a styrene-based thermoplastic elastomer, a bromine-based flame retardant, and antimony trioxide.
[3] A honeycomb-shaped structure that is a collection of a plurality of polygons by continuous lattice walls, forming a lattice body that is open at least upward, and compressibility between an upper layer portion and a lower layer portion of the lattice body, The bendability and buckling property are set to be different, and the upper layer portion has a planar shape having a height lower than the height of the lattice wall from the upper surface portion in the polygon of the honeycomb-shaped structure constituting the lattice body. A three-dimensional lattice-shaped cushion made of a viscoelastic elastomer compound, in which both ends of the shaped rib are integrally formed on the inner wall of the lattice wall,
A flame-retardant three-dimensional lattice-shaped cushion, wherein the viscoelastic elastomer compound contains oil, a styrene-based thermoplastic elastomer, a bromine-based flame retardant, and antimony trioxide.
[4] The brominated flame retardant having a weight ratio of 0.10 to 0.40 with respect to the total weight of the oil and the styrene thermoplastic elastomer, and 0.03 to 0.15 The flame retardant solid lattice-shaped cushion according to any one of [1] to [3], wherein the antimony trioxide is included.
[5] The [1] to [4], wherein the viscoelastic elastomer compound includes the styrene thermoplastic elastomer in a weight ratio of 0.10 to 0.50 with respect to the weight of the oil. The flame-retardant solid lattice-shaped cushion as described.
[6] The flame retardant solid lattice-shaped cushion according to [1] to [5], wherein the styrene thermoplastic elastomer has a weight average molecular weight of 100,000 to 500,000.
[7] The flame-retardant three-dimensional lattice-shaped cushion according to [1] to [6], wherein the styrene-based thermoplastic elastomer has a styrene content of 15 to 50% by weight.
[8] The flame-retardant three-dimensional lattice-shaped cushion according to [1] to [7], wherein the bromine-based flame retardant has a melting point higher than that of the styrene-based thermoplastic elastomer.
[9] The flame retardant solid lattice shape according to [1] to [8], wherein the brominated flame retardant is a component having an aromatic ring having a plurality of bromine atoms in the molecular structure. cushion.
[10] The flame retardant solid lattice-shaped cushion according to [1] to [9], wherein the oil is a paraffinic oil.
[11] The flame-retardant three-dimensional lattice cushion according to [1] to [10], which is used for automobile interiors.

  According to the present invention, while having sufficient flame retardancy, the flame retardancy has mechanical properties such as moderate softness and compressibility, vibration absorption, dehumidification, deformation followability and no sag required as a cushion. It is possible to provide a three-dimensional lattice-shaped cushion.

It is a figure which shows the 1st structural example of this invention. It is a figure which shows the 2nd structural example of this invention. It is a figure which shows the 3rd structural example of this invention. It is the figure which measured the body pressure dispersion | distribution of the cushion body which has the spatial structure which consists of 1 layer of honeycomb-like lattice walls. It is the figure which measured the body pressure dispersion | distribution of the cushion body to which the structure of this invention is applied. It is the figure illustrated about the behavior when a big twist (shearing force) acts on a lattice wall.

The flame retardant solid lattice-shaped cushion according to a preferred embodiment of the present invention will be described in the following order.
1) Material of flame retardant three-dimensional lattice cushion 1-1) Components of viscoelastic elastomer compound 1-2) Manufacturing method of viscoelastic elastomer compound 1-3) Properties of viscoelastic elastomer compound 1-4) Viscoelastic elastomer compound 2) Flame Retardant Solid Lattice Shape Cushion Structure 3) Flame Retardant Solid Lattice Shape Cushion Manufacturing Method 4) Physical Properties of Flame Retardant Solid Lattice Shape Cushion 5) Action / Effect of Flame Retardant Solid Lattice Shape Cushion 6 ) How to use a flame retardant solid lattice cushion

≪Material for flame retardant solid lattice shaped cushion≫
<Ingredients of viscoelastic elastomer compound>
(component)
-Styrenic thermoplastic elastomer The styrene thermoplastic elastomer used for this invention is not specifically limited. Specific examples of the styrenic thermoplastic elastomer in the embodiment of the present invention include, for example, polystyrene-poly (ethylene / propylene) block (SEP), polystyrene-poly (ethylene / propylene) block-polystyrene (SEEPS), and SBS (styrene- Butadiene-styrene copolymer), SEBS (styrene-ethylene-butadiene-styrene copolymer), SEBC (styrene-ethylene-butadiene-highly crystalline ethylene copolymer), SEPS (styrene-ethylene-propylene-styrene copolymer) ) And the like. Further, it may be a triblock or a diblock. However, although the reason is not clear, when a flame retardant or a flame retardant aid is added, a triblock is preferable because the degree to which the properties originally possessed by the elastomer are impaired is lower than that of diblock. One of these or a mixture of two or more can be used.

  The weight average molecular weight of the styrenic thermoplastic elastomer used in the present invention is preferably 100,000 to 500,000. More preferably, it is 150,000 to 400,000, and most preferably 200,000 to 350,000. If the weight average molecular weight is 100,000 or more, moldability is improved, and if it is 500,000 or less, high followability as a structure can be satisfied. Here, the weight average molecular weight refers to a polystyrene equivalent weight average molecular weight measured by a gel permeation chromatography (GPC) method. The measurement conditions are as follows.

Eluent: Tetrahydrofuran (THF), Sample concentration (THF solution): 0.1% (W / V), Column: G4000H _XL + G2000H _XL + G1000H _XL (manufactured by Tosoh Corporation, 7.8 mmφ × 300 cm each), column temperature : 40 ° C, detector: differential refractometer (RI)

The styrene content of the styrenic thermoplastic elastomer used in the present invention is preferably 15 to 50% by weight. More preferably, it is 20 to 40% by weight, and most preferably 25 to 35% by weight. When the styrene content rate satisfies this range, a suitable hardness as a cushion can be obtained. Further, as will be described later, mechanical properties such as flexibility and plasticity can also be provided in relation to the aromatic ring of the brominated flame retardant. The styrene content described in the present invention can be measured by a general method. For example, it can be measured using an ultraviolet spectrophotometer or ¹ H-NMR spectrum.

-Oil It does not specifically limit as oil used for this invention. In addition to mineral oils, synthetic oils can also be used. It is preferable to comprise mineral oils such as naphthenic oil and paraffinic oil. However, in the system of the present invention in which a styrene thermoplastic elastomer, a brominated flame retardant, and antimony trioxide are combined, the reason is not clear, but paraffinic oil is used in comparison with other oils. This is preferable because the effect of the invention is further enhanced. This is used as a plasticizer or softener such as a thermoplastic elastomer. Even if any of naphthenic oil, paraffinic oil, synthetic oil, or a mixture thereof is used, the above-described effect as a plasticizer or softener can be obtained in the same manner.

-Brominated flame retardant The flame retardant used in the present invention is a brominated flame retardant. Such brominated flame retardants include hexabromocyclododecane (HBCD), hexabromobenzene, decabromodiphenyl oxide (DBDPO), octabromodiphenyl oxide, tetrabromobisphenol A (TBBA), bis (tribromophenoxy) ethane. Bis (pentabromophenoxy) ethane (BPBPE), tetrabromobisphenol A epoxy resin (TBBA epoxy), tetrabromobisphenol A carbonate (TBBA-PC), ethylene (bistetrabromophthal) imide (EBTBPI), ethylene bispentabromo Diphenyl, tris (tribromophenoxy) triazine (TTBPTA), bis (dibromopropyl) tetrabromobisphenol A (DBP-TBBA), bis (dibromopropyl) (Lopyl) tetrabromobisphenol S (DBP-TBBS), tetrabromobisphenol S (TBBS), tris (tribromoneopentyl) phosphate (TTBNPP), polybromotrimethylphenylindane (PBPI), tris (dibromopropyl) -isocyanurate (TDBPIC). These flame retardants can be used alone or in admixture of two or more.

  The brominated flame retardant used in the present invention is preferably a component having an aromatic ring having a plurality of bromine atoms in the molecular structure. Because the brominated flame retardant binds to the hard block part of the styrenic thermoplastic elastomer due to the interaction between the aromatic ring in the molecular skeleton of the styrenic thermoplastic elastomer and the aromatic ring of the brominated flame retardant (that is, on the plasticizer side). Since the amount of the plasticizer flame retardant dispersed can be relatively reduced), the amount of the flame retardant used can be reduced. As a result, the original physical properties of the cubic lattice cushion made of viscoelastic elastomer compound ( It is presumed that flame retardancy can be imparted without impairing viscoelasticity, stretchability, durability, etc.). The bromine content is preferably 60% by mass (theoretical value relative to the entire molecular weight) or more.

(Influence on mechanical properties of benzene ring)
Moreover, in addition to the above mechanism, as a result of relatively reducing the content of brominated flame retardant, sufficient flame retardancy can be imparted, and the content of the aromatic ring whose structure itself is rigid is reduced as a whole. It becomes possible. As a result, when applied to a cushion or the like as a structure, it is presumed that both desired mechanical properties and flame retardancy can be realized.

  The brominated flame retardant used in the present invention preferably has a melting point of the brominated flame retardant higher than that of the styrene thermoplastic elastomer. This is because if the melting point is lower, the effect as a flame retardant may not be exhibited. The melting point can be measured by a general method. For example, using a differential scanning calorimeter, it can be measured as the temperature of the melting peak when the temperature is raised at a heating rate of 10 ° C./min.

  Regarding the flame retardancy in the present invention, FMVSSS No., which is the standard for interior materials for automobiles in the United States, when the use of automobile seats is considered. It is preferable to satisfy 302.

  The present invention contains antimony trioxide which is an inorganic flame retardant as a flame retardant aid together with a flame retardant. Flame retardancy can be enhanced by using in combination with a brominated flame retardant. In addition to antimony trioxide, other flame retardant aids can be used in combination. Examples of such flame retardant aids include antimony tetraoxide, antimony pentoxide, sodium pyroantimonate, and trichloride. Antimony compounds such as antimony, antimony trisulfide, antimony oxychloride, antimony perchloropentane dichloride, potassium antimonate, boron metabolites such as zinc metaborate, zinc tetraborate, zinc borate, basic zinc borate, zirconium oxidation And antimony tetraoxide, antimony pentoxide, antimony trichloride, antimony trisulfide, and zinc borate are preferable.

-Other components The viscoelastic elastomer compound of the present invention is a heat stabilizer, antioxidant, light stabilizer, ultraviolet absorber, crystal nucleating agent, anti-blocking agent, seal as long as the object of the present invention is not impaired. Well-known agents such as property improvers, mold release agents such as stearic acid and silicone oil, lubricants such as polyethylene wax, colorants, pigments, inorganic fillers such as alumina, and foaming agents (organic, inorganic, microcapsule) Additives can be blended.

<Combination ratio of each component>
(Combination ratio of styrene thermoplastic elastomer)
The viscoelastic elastomer compound of the present invention preferably contains 5 to 30% by weight, more preferably 10 to 20% by weight of the styrenic thermoplastic elastomer component relative to the total composition. If it is 5% by weight or more, moldability is improved, and if it is 30% by weight or less, sufficient heat resistance is considered to be obtained.

(Oil blending ratio)
The viscoelastic elastomer compound of the present invention preferably contains 30 to 80% by weight of oil component, more preferably 40 to 70% by weight, based on the total composition. If it is 30% by weight or more, desired flexibility and compressibility can be obtained, and if it is 80% by weight or less, sufficient moldability can be obtained.

(Combination ratio of styrene thermoplastic elastomer and oil component)
The weight ratio of the oil and the styrene-based thermoplastic elastomer contained in the viscoelastic elastomer compound of the present invention preferably contains styrene-based thermoplastic elastomer at 0.10 to 0.50 with respect to the oil, and more preferably. Is 0.15 to 0.35. If it is 0.10 or more, the moldability is improved, and if it is 0.50 or less, it is expected to have sufficient heat resistance.

(Combination ratio of flame retardant components)
The viscoelastic elastomer compound of the present invention has a weight ratio of 0.10 to 0.40 brominated flame retardant and 0.03 to 0.15 antimony trioxide with respect to the total weight of oil and styrenic thermoplastic elastomer. It is preferable to contain a bromine-based flame retardant having a weight ratio of 0.20 to 0.30 and 0.06 to 0.10 antimony trioxide. Originally, the components of viscoelastic elastomer compounds, such as oil and styrene thermoplastic elastomers, are flammable, so imparting flame retardancy to them is the viscoelasticity, elasticity and durability of the materials. It becomes easy to inhibit. In addition, in order to satisfy the mechanical properties required as a cushion, a very fine formulation is required. For example, in order to maintain durability when commercialized as a cushion, it is required that the result of a repeated compression residual strain test described later satisfy a predetermined value. For this purpose, in addition to the selection of the above-mentioned flame retardant materials, it is also important to select the blending ratio of the above four main components (oil, styrene thermoplastic elastomer, bromine flame retardant and antimony trioxide). come. Here, the quality requested | required in the test of a repeated compression residual strain test is satisfy | filled by making the brominated flame retardant which is a flame retardant raw material, and antimony trioxide below into the upper limit ratio mentioned above. On the contrary, by setting it to the lower limit value or more, it is difficult to easily burn.

(Ratio of other components)
The blending ratio of other components is not particularly limited. In the range which does not impair the effect which this invention requires, other components, such as an additive, can be contained.

≪Method for producing viscoelastic elastomer compound≫
Examples of the melt-kneading apparatus used for obtaining the viscoelastic elastomer compound of the present invention include an open type mixing roll, a non-open type Banbury mixer, an extruder, a kneader, and a continuous mixer. In the melt-kneading, all components to be kneaded may be melt-kneaded all at once, or some components may be kneaded and then other components may be added and melt-kneaded. The melt-kneading is performed once or twice. This may be done. In order to improve the kneading state, it is preferable to use a twin screw extruder. Melting may occur at a temperature lower than the glass transition point of the styrene-based thermoplastic elastomer, and the higher the temperature, the lower the melt viscosity and the easier the mixing, but if too high, thermal decomposition may occur. The temperature in melt kneading is usually 100 to 250 ° C., and the time is usually preferably 1 to 30 minutes. The temperature and melt kneading time can be appropriately adjusted according to the application.

≪Properties of viscoelastic elastomer compound≫
Styrenic thermoplastic elastomers are usually rubber-like at room temperature, but have a thermoplastic property that allows soft deformation and free deformation by breaking the cross-linked structure as the temperature rises. These structures in the viscoelastic elastomer compound are generally constituted by a styrene block site being physically crosslinked at room temperature, whereby oil molecules are incorporated into a network structure formed by the physical crosslinking. It has a gel (gel) structure. Gels incorporating such organic substances are generally classified as organogels.

≪Physical properties of viscoelastic elastomer compound≫
<Flammability test>
Regarding the flame retardancy of the viscoelastic elastomer compound of the present invention, FMVSS (Federal Motor-Vehicle Safety Standard) No. 302 Evaluation is performed according to the combustion test. The flame retardance standard can be appropriately changed depending on the application, but the burning rate is preferably 150 mm / min or less, more preferably 102 mm / min or less, and 80 mm / min. Most preferably, it is less than or equal to min. In the case of an automobile seat which is a preferred application of the present invention, it is considered to be preferably 102 mm / min or less. This is to ensure sufficient time to escape in the event of a vehicle fire.

  The physical property value of the viscoelastic elastomer compound of the present invention, which is a three-dimensional lattice-shaped structure, and has excellent mechanical properties as a cushion (such as torsional followability / absorbability and deformation and sag of vertical and horizontal partition walls) The following three tests are listed as methods for measuring physical property values required to realize (prevention).

<Tensile strength test>
The tensile strength test is the maximum stress that leads to cutting in accordance with JIS K 6251: 2010 “Vulcanized rubber and thermoplastic rubber-Determination of tensile properties” with “Dumbell shape No. 3” as the shape of the test piece. The tensile strength (MPa) is measured. The tensile strength of the viscoelastic elastomer compound of the present invention is preferably 0.8 MPa or more, and more preferably 1.2 MPa or more. By having a tensile strength of 0.8 MPa or more, particularly durability, followability and absorbability characteristics can be improved.

<Elongation test at cutting>
The tensile strength test was measured in accordance with JIS K 6251: 2010 “Vulcanized rubber and thermoplastic rubber-Determination of tensile properties” with “Dumbell shape No. 3” as the test piece shape. To do. The tensile strength of the viscoelastic elastomer compound of the present invention is preferably 850% or more, and more preferably 1000% or more. By having a tensile strength of 850% or more, particularly durability and followability / absorbability characteristics can be improved.

<Tear strength test>
The tear strength test was measured according to JIS K 6252: 2007 “Vulcanized rubber and thermoplastic rubber-Determination of tear strength” with “Crescent shape” as the shape of the test piece. To do. The tensile strength of the viscoelastic elastomer compound of the present invention is preferably 8.0 kN / m or more, and more preferably 10.0 kN / m or more. By having a tensile strength of 8.0 kN / m or more, particularly durability characteristics can be improved.

≪Structure of flame retardant solid lattice shaped cushion≫
In the cushion according to the present embodiment, a lattice body having a polygonal honeycomb shape is formed by continuous lattice walls made of a viscoelastic elastomer compound so that the compressibility, flexibility and buckling property in the vertical direction are different. Depending on the configuration to be set, the compressibility, bendability and buckling property of the upper layer honeycomb-shaped structure are increased, and the compressibility, bendability and buckling property of the lower layer honeycomb-shaped structure are set to be small so that the upper layer can withstand a small load. Improve the followability, prevent the sinking that feels the bottom from the load in the lower layer, improve the sleeping comfort, and lie on the bed for a long time, such as sick people and people who need care Distribute the load of people who should not be able to prevent problems such as blood circulation problems.

  Within the polygonal shape of the honeycomb-shaped structure constituting the lattice body, the planar shape that is about half the height of the lattice wall from the bottom is a + shape (including a square shape such as a × shape or a well shape). The ribs made of elastic elastomer compound are integrally formed on the inner wall of the lattice wall, making the cushion's vertical compressibility, flexibility and buckling different, improving the followability to small loads, and bottoming with loads It is possible to prevent a sinking that feels a sense and to provide a cushion with excellent load dispersibility.

  The structure in which the cross-section of the polygonal shape of the honeycomb structure constituting the lattice body is integrally formed so as to differ in the vertical stacking direction makes the cushion's vertical compressibility, bendability and buckling property different, and a small load Therefore, it is possible to prevent the sinking such that the following performance is improved and the feeling of bottoming out, and the cushion has excellent load dispersibility.

  A honeycomb-shaped structure having a small polygonal cross-sectional size and a honeycomb-shaped structure having a large polygonal cross-sectional size are stacked and fixed only at the periphery thereof. The center of the honeycomb-shaped structure with a large cross-sectional size is not fixed, so the skin surface comfort is absorbed while absorbing movements other than the vertical direction such as twisting and crushing that occur when the structure rolls over. The force of the polygonal honeycomb structure with a large cross-sectional size can be expanded over a wide range as well as the side surface of the honeycomb structure. Dispersibility can be further improved, and a cushion can be provided that is comfortable to sleep and can prevent blood circulation problems.

  By forming a lattice body having a polygonal honeycomb shape structure with continuous lattice walls and setting the vertical compressibility, bendability and buckling property to be different, the compressibility of the upper layer honeycomb shape structure, Decreasing the flexibility and buckling, setting the compressibility, flexibility and buckling of the honeycomb structure of the lower layer large, increasing the skin contact area in the upper layer, reducing the skin stress, Improves the ability to follow deviations and torsional movements other than in the vertical direction, making it possible to prevent sinking that feels bottoming.

  Because the honeycomb structure of the upper and lower layers is formed integrally, the wall tilt distance due to pressing is reduced, so the user can reduce the sense of rolling and the vertical and horizontal partition walls are less inclined. Also, there is an effect of preventing deformation and sag of the vertical and horizontal partition walls caused by long-term use. Furthermore, the torsion (shearing force) generated by the vibration and body motion of the vehicle is absorbed, and it becomes possible to prevent a blood circulation disorder and the like.

  Hereinafter, specific structural examples of the flame-retardant solid lattice-shaped cushion of the present invention will be described in detail with reference to FIGS.

<First structural example>
An embodiment according to the structure of the present invention will be described with reference to the drawings. FIGS. 1A, 1B and 1C show a first structural example of the cushion of the present invention. The cushion 1 is selected from an aggregate composed of an elastomer and a viscoelastic elastomer, and is formed of a viscoelastic elastomer compound further including a flame retardant. The cushion 1 is formed into a honeycomb-shaped structure, which is an aggregate of a plurality of rectangular cross sections, including a lateral side wall 2, a longitudinal direction side wall 3, a lateral direction partition wall 4, and a longitudinal direction partition wall 5. The cross-sectional shape of the unit polygon of the honeycomb structure is not limited to the rectangle shown in the embodiment, but may be another polygon. A planar shape formed of a viscoelastic elastomer compound extending from the bottom of the polygonal cross section surrounded by the transverse partition walls 4 and the longitudinal partition walls 5 of the honeycomb-shaped structure to a height lower than the height of the transverse longitudinal partition walls 4 and 5. As shown in FIGS. 1A and 1B, a X-shaped rib 6 or a + -shaped rib 6 is formed as shown in FIG. Both ends of the rib 6 are integrally connected to the inner walls of the horizontal and vertical partition walls 4 and 5. The shape of the rib 6 may be any shape as long as the compressibility, flexibility, and buckling property of the cushion 1 in the vertical direction are appropriately different. Further, the height from the bottom of the rib 6 can be lowered by increasing the thickness of the rib 6. By configuring the cushion 1 in this way, the compressibility, bendability and buckling property of the portion where the rib 6 is not formed are the same as the compressibility, bendability and buckling property of the portion where the rib 6 is formed. Since the upper portion of the cushion 1 is relatively large, the upper portion of the cushion 1 follows even a small load, and the load is distributed. The lower portion of the cushion 1 has a smaller compressibility, bendability and buckling property than the upper portion. Prevent sinking.

<Second structural example>
FIGS. 2A and 2B show a second structural example of the cushion of the present invention. The cushion 7 shown in the second structural example is selected from an aggregate made of an elastomer and a viscoelastic elastomer, and is formed of a viscoelastic elastomer compound further including a flame retardant. The cushion 7 is composed of two upper and lower portions 8 and 9. As shown in FIG. 2A, the upper portion 8 of the cushion 7 has a lateral side wall 10, a longitudinal side wall 11, a lateral partition 12, and a longitudinal partition 13 like the cushion 1 of the second structural example. And formed into a honeycomb-shaped structure which is an aggregate of a plurality of rectangular sections. Further, the lower portion 9 of the cushion 7 is formed in a honeycomb-shaped structure which is an aggregate of a plurality of rectangular cross sections, with the lateral side wall 14, the longitudinal side wall 15, the lateral direction partition wall 16 and the longitudinal direction partition wall 17. The difference between the upper and lower portions 8 and 9 of the cushion 7 is that the polygonal cross-sectional size constituting the honeycomb structure is formed so that the upper portion 8 is larger than the lower portion 9. As shown in FIG. 2B, the upper and lower portions 8 and 9 of the cushion 7 are integrally formed. By integrally forming the cross-sectional size of the polygon constituting the honeycomb-shaped structure of the upper portion 8 of the cushion 7 to be larger than the cross-sectional size of the polygon constituting the honeycomb-shaped structure of the lower portion 9, the cushion 7 The upper portion 8 follows even a small load and distributes the load, and the lower portion 9 of the cushion 7 is smaller in compressibility, flexibility and buckling than the upper portion, and prevents sinking due to the load. To do.

<Third structure example>
3A and 3B show a third structural example of the cushion of the present invention. The cushion 18 shown in the third structural example is selected from an aggregate made of an elastomer and a viscoelastic elastomer, and is formed of a viscoelastic elastomer compound further including a flame retardant. The cushion 18 is composed of two upper and lower portions 19 and 20. As shown in FIG. 3A, the upper portion 19 of the cushion 18 is a honeycomb that is an aggregate of a plurality of rectangular cross sections including a lateral side wall 21, a longitudinal side wall 22, a lateral partition wall 23, and a longitudinal partition wall 24. Formed into a shape structure. In addition, the lower portion 20 of the cushion 18 is formed in a honeycomb-shaped structure which is an aggregate of a plurality of rectangular cross sections including a lateral side wall 25, a longitudinal side wall 26, a lateral partition wall 27, and a longitudinal partition wall 28. A sheet-like material 29 such as non-woven fabric, cloth, tape, paper, etc. is adhered only to the periphery. As shown in FIG. 3B, the upper and lower portions 19 and 20 of the cushion 18 are formed as separate bodies, and the upper portion 19 of the cushion 18 is bonded only around the upper surface of the lower portion 20. 29 are bonded together by an adhesive or heat welding. The cross-sectional size of the polygon that forms the honeycomb-shaped structure of the upper portion 19 of the cushion 18 is larger than the cross-sectional size of the polygon that forms the honeycomb-shaped structure of the lower portion 20. The compressibility, bendability and buckling property of the upper portion 19 of the cushion 18 are larger than the compressibility, bendability and buckling property of the lower portion 20, and the upper portion 19 only surrounds the lower portion 20. Because it is in a fixed state, the movement of twisting of the polygonal honeycomb-shaped structure having a large cross-sectional size can move not only on the side surface of the honeycomb-shaped structure but also in a wide range during movement such as turning over. Therefore, the dispersibility of the load is further improved, and the upper portion 19 of the cushion 18 follows even a small load, disperses the load, and the lower portion 20 of the cushion 18 is compressible, flexible and buckled. Is smaller than the upper part to prevent sinking due to load.

  In the structural example of the present invention, a structural limitation is added to the effect that a rib whose planar shape is lower than the lattice wall is formed integrally with the inner wall. In addition, the structural example of the present invention solves the problem of lack of durability such as so-called sag, and also follows a small load applied to the cushion, and further twists (shearing force) when turning over. An object of the present invention is to provide a cushion that absorbs the water and disperses the load so that the user does not feel the bottom, thereby eliminating the sinking and improving the sleeping comfort and sitting comfort.

  For this purpose, in the structural example of the present invention, ribs having a cross-sectional shape of a height lower than the height of the lattice wall from the bottom of the honeycomb-shaped polygon constituting the lattice body are arranged inside the lattice wall. Are formed integrally with each other. That is, in the structure example of the present invention, a two-stage structure is formed of a lower layer portion in which x or + shaped ribs are formed and an upper layer portion in which these ribs are not formed (hereinafter, such an installation method is referred to as a first method). Is called the installation method). Thereby, the compressibility of the up-down direction of a cushion, flexibility, and buckling property can be varied greatly between an upper layer part and a lower layer part.

  If a small load is applied to the cushion, it can be received by the upper layer portion having no rib, and only the upper layer portion can follow this. On the other hand, when a large load that cannot be received only by the upper layer portion is applied, the wall surface of the lattice wall of the upper layer portion is inclined to the lower layer portion, and the wall surface comes into contact with the lower layer portion. At this time, since the large load can be received by the rib structure of the lower layer portion, it is possible to prevent a sinking that the user feels bottoming and to provide a cushion with excellent load dispersibility.

  In the structural example of the present invention, the upper layer portion and the lower layer portion are clearly separated in the vertical direction. Moreover, the ribs constituting the lower layer part are formed integrally with the surrounding lattice wall and are not formed in a projecting shape, so that even if a large torsion (shearing force) is applied, the rib almost tilts. There is no.

  Further, in the structural example of the present invention, the rib is limited so that the planar shape of the rib is x or +, and the crossing angle of the rib is approximately 90 °. That is, by limiting the crossing angle of the ribs to approximately 90 °, there is almost no tilting regardless of the direction of twisting.

  That is, in the structural example of the present invention, the compressibility, flexibility, and buckling property of the upper layer portion where the rib is not formed and the lower layer portion where the rib is formed can be greatly different from each other. it can. Therefore, when a load is applied, it is possible to mainly tilt only the lattice wall constituting the upper layer portion without tilting the lower layer portion having the rib structure. In other words, the total tilt distance can be handled only by the upper layer part where the rib is not formed, and the tilt distance carried by the lower layer part can be reduced. For this reason, it is possible to greatly reduce the feeling of side swaying given to the user.

  In the cushion according to the present invention, the total tilt distance can be reduced. For this reason, by disposing the cushion according to the present invention on the seat surface of a wheelchair or the like, it is possible to improve the stability of the sitting position compared to a simple lattice-shaped cushion body, and it is particularly difficult to maintain the sitting position. It is also possible to provide a cushion body that reduces the tilting distance while further reducing the tilt distance for the elderly and the physically handicapped. In addition, by providing a cushion having the above-described configuration in a wheelchair or the like, it is possible to provide an innovative wheelchair that can always hold and stabilize the sitting posture of an elderly person or the like.

  Moreover, the structural example of this invention can also employ | adopt the 2nd installation method installed upside down. In this second installation method, a rib structure having a planar shape of x or + is used as the upper layer portion, and a honeycomb-like lattice wall having no rib is used as the lower layer portion. In such a case, it is possible to increase the contact area between the upper layer surface and the body surface of the user in contact with the upper layer surface, and it is possible to give a soft touch feeling to the user, and a stable and gentle skin feeling. It is also possible to continue to give a more comfortable cushion body. For example, when a small load is applied to the surface of the upper layer portion, the upper layer portion transmits the load to the lower layer lattice wall with almost no deformation. The part bends based on the transmitted load, thereby dispersing the load. Even when a large load is applied to the surface of the upper layer, the upper layer gradually sinks into the lower layer while maintaining its shape, and after the upper layer reaches the cushion bottom, the upper layer itself collapses. However, the load will be dispersed. In particular, when the bottom of the cushion is fixed with a nonwoven fabric or the like, the tilt distance of the cushion body itself is smaller than the tilt distance of the cushion body in the first installation method, and the sitting posture can be more stably maintained. It will be planned.

  As described above, the structure example of the cushion according to the present invention is formed by forming a spatial structure composed of honeycomb-like lattice walls that are roughly divided and a spatial structure surrounded by finely divided rib structures over two layers. Yes. The tendency of tilting can be significantly different between these two layers. And in this cushion, it becomes possible to use properly the 1st installation method and the 2nd installation method by changing an upper layer part and a lower layer part.

  That is, the first installation method is desirable when a large force is applied locally such as a heel, and the second installation method is when the body and the cushion body contact over a wide range such as the back. Is desirable. In particular, the second installation method exhibits a particularly excellent effect in reducing side shaking by eliminating the bottom itself when it is necessary to take a sitting posture by lifting the backrest of the bed. Furthermore, since the second installation method can give a soft touch feeling to the user, a more comfortable use environment is provided for users who are sensitive to skin contact feeling or who are concerned about skin damage due to edema. It can also be provided.

  Further, the first installation method and the second installation method are cases where the cushion is deformed by applying a large load to the space structure portion divided into two small parts by providing the space structure having two different shapes. However, since the space surrounded by the walls of the honeycomb structure can always be maintained, the body temperature is excellent and the moisture is easily released. It is.

  Although the above-mentioned content is the description about the installation method of the cushion 1 of FIG. 1, about the cushion 7 of FIG. 2, although both the upper part 8 and the lower part 9 are the combinations by a 1st installation method, Both the upper portion 8 and the lower portion 9 can be combined by the second installation method. Further, for this combination, the cushion 7 can be configured with the upper portion 8 as the first installation method and the lower portion 9 as the second installation method, and the upper portion 8 as the second installation method. It is also possible to configure the cushion 7 using the portion 9 as the first installation method. Further, when the cushion 7 is configured as another combination, it is possible to arrange the lower portion 9 in the upper portion and the upper portion 8 in the lower portion. In this case, the combinations can be four combinations as described above. Become. Therefore, a total of eight combinations are possible as a combination method for constituting the cushion 7. This is the same when the cushion 18 of FIG. 3 is configured. These combinations are determined according to the required strength and situation of the cushioning properties, and an optimum configuration can be created.

  In addition, the structural example of the present invention having a two-layer structure in which the upper layer portion and the lower layer portion are clearly separated in the vertical direction can make a significant difference in deformation behavior between the upper layer portion and the lower layer portion. It is possible to effectively absorb the shifting force generated in the body. For this reason, it is possible to greatly reduce the decrease in blood flow in the capillaries by absorbing the shearing force generated on the body surface due to the displacement, and it is also possible to prevent the occurrence of the floor displacement itself.

  As support for this, FIG. 4 is data obtained by measuring body pressure dispersion of a cushion body (hereinafter referred to as a comparative structure example) having a spatial structure composed of one layer of honeycomb-like lattice walls, and FIG. 5 shows the present invention. It is the data which measured the body pressure dispersion | distribution of the cushion body which applied this structure. Each of these data is such that the back-up angle is 80 °, which is the situation where the most local pressure can be generated in actual use of the cushion body to which the comparative structure example is applied and the cushion body to which the structure of the present invention is applied. The pressure distribution applied to each cushion body was measured with each placed on a bed and with a human body sitting.

  As a result, in FIG. 4, the region exceeding 40 mmHg is displayed slightly, and it is shown that a region where the pressure is locally increased occurs. This occurs because the honeycomb-like lattice wall is greatly tilted and sinks due to the load, and the load cannot be dispersed.

  On the other hand, in FIG. 5, since the area | region exceeding 40 mmHg is not displayed at all, the area | region where pressure becomes high does not generate | occur | produce, but sinking is suppressed by distributing a load. The effect is shown. In addition, the effect due to the difference in body pressure distribution during sleep becomes more prominent particularly in a state where the human body is set to a lateral posture rather than a supine posture.

  From the above-mentioned supporting results, the present invention adopting a configuration that is different from the comparative structure example particularly in a case where more comfortable bedding and chairs must be provided with emphasis on the health of the user, The present invention has a function and effect peculiar to the structure example of the present invention that does not occur in the invention described in the comparative structure example.

  In the structure example of the present invention, a lattice body having an open top may be formed. By opening the upper side in this way, it is possible to improve the dehumidifying property as compared with the case where the inside of the column is sealed, and it is possible to effectively absorb the shearing force (torsional force).

  In addition, the structure example of the present invention in which the inside of the lattice body is not sealed does not necessarily show a direct type sinking operation, but shows various bending operations according to the gravity of the object. For this reason, in the structure example of the present invention, it is not possible to effectively prevent the cushion element from sinking simply by disposing the solid protrusions while paying attention only to the direct subsidence.

  Therefore, in the structural example of the present invention, both ends of the rib made of viscoelastic elastomer compound having a + shape in the planar shape are integrally formed on the inner wall of the lattice wall. As a result, even if a large twist (shearing force) acts on the lattice wall, the tilt distance can be reduced by forming the inner wall and both ends of the rib integrally. In support of this, in FIG. 6, Experimental Example 1 in which the inner wall of the lattice wall and both ends of the rib are integrally formed is compared with Experimental Example 2 in which the rib both ends are not integrally formed on the inner wall of the lattice wall. It is shown that (distance AA ′) is small. For this reason, when the structural example of the present invention having a small tilt distance is applied as a cushion, the body can be kept stable by preventing the body from sinking.

  On the other hand, when the solid protrusion formed in the sealed lattice body is disposed as an alternative to the rib of the structural example of the present invention, the solid protrusion is, as shown in Experimental Example 3 of FIG. The vertical wall erected vertically is tilted largely in the same manner as the tilting tendency, and the tilting distance itself is increased, giving the user a so-called side-shake feeling. In particular, when a twist (shearing force) is applied when turning over, this column or solid protrusion will tilt greatly, which gives great discomfort to the elderly and disabled people who use it. It will also end up.

  In other words, the structural example of the present invention is an optimal lattice for contributing to stable maintenance of the body with sufficient insight into the tilting tendency and tilting distance when a load is applied to the grid body whose upper side is open. A new configuration for realizing tilting of the body is newly found, and this is a constituent requirement of the invention.

  In such a structure example of the cushion according to the present invention, the total tilt distance can be reduced as compared with the conventional example. For this reason, by arranging the structural example of the cushion according to the present invention on the seating surface of a wheelchair or the like, it is possible to improve the stability of the sitting position as compared with a simple lattice-shaped cushion body, and particularly to maintain the sitting position. It is also possible to provide a cushion body with a reduced tilting distance while reducing the tilting distance for elderly persons and persons with physical disabilities who are difficult to handle. In particular, the cushion body disposed in a wheelchair or the like has a structure in which the elderly person or the like sits continuously for a long time, so that the humidity tends to be high but the upper part of the lattice body is opened. In the example, the cushion body can be dehumidified.

≪Method of manufacturing flame-retardant three-dimensional lattice cushion≫
The method for producing the flame-retardant solid lattice-shaped cushion of the present invention will be described in detail below.

The manufacturing method of the structure of the present invention is not particularly limited. Changes can be made according to the melting point, mixing ratio, etc. of the styrene thermoplastic elastomer or mineral oil. As a specific method for producing the structure of the present invention, for example, the following steps are included.
(1) a kneading step in which a styrene thermoplastic elastomer and a plasticizer are kneaded to form a molding material;
(2) A molding step of press-fitting the molding material obtained in (1) into a cavity of a mold at a predetermined temperature;
(3) After (2), after the shape of the molded product in the cavity is stabilized, the mold is opened and a mold release step is taken out to take out the molded product.

  The step of “kneading” the material is as described above, and is not particularly limited as long as various components are mixed well. Moreover, various components can also be dissolved and mixed in the soluble organic solvent.

  As a method used in the molding process using the viscoelastic elastomer compound of the present invention, for example, injection molding or extrusion molding can be applied. For this, a molding machine capable of melting a general molding material can be used. An injection molding machine, an extrusion molding machine, etc. are mentioned. As molding conditions, 100 to 300 ° C is generally preferable, and 120 to 280 ° C is more preferable. In this case, the temperature of the mold to be used is preferably set to 50 ° C to 210 ° C.

≪Physical properties of flame retardant solid lattice shaped cushion≫
The following two items are evaluated about the physical property value as a structure of a flame-retardant solid lattice-shaped cushion. By including a flame retardant material as in the present invention, the hardness is generally increased. Also, the physical properties obtained vary greatly depending on the type and amount of flame retardancy. For example, when Al hydroxide or Mg hydroxide is used as a flame retardant, even if the flame retardancy is sufficient, there is no elasticity and the structure example of the present invention does not sufficiently function as a cushion Occurs. In general, the predetermined mixing ratio between the oil of the present invention and the thermoplastic elastomer may cause problems in moldability and form retention in a complicated structure because it is too flexible. However, by making the flame retardant component within the scope of the present invention, the two-layer structure through the rib structure of the present invention can provide formability and form retention, and at the same time, a cushion based on flexibility following It satisfies the mechanical characteristics of Therefore, in relation to the structure, it is necessary to adjust the contents of the oil and the styrenic thermoplastic elastomer at the same time. In other words, in order to simultaneously achieve the flame retardancy required for the flame retardant solid lattice cushion and the mechanical properties described above, the main components (oil, styrenic heat It is essential to strictly adjust the blending ratio of plastic elastomer, brominated flame retardant, and antimony trioxide.

<Compressive residual strain test>
The elasticity (shape reproducibility) required for the viscoelastic elastomer compound according to the present invention as a cushion structure is evaluated by determining the compression residual strain (C _s ) in accordance with JIS K 6400-4: C method. To do. The compression residual strain of the flame retardant solid lattice-shaped cushion of the present invention is preferably 10.0% or less, more preferably 5.0% or less, and 3.0% or less. Is most preferred. This is because if it is 10.0% or less, the cushion having the structure according to the present invention satisfies the required excellent durability and reproducibility of the cushion function.

<Repetitive compression residual strain test>
The durability required of the viscoelastic elastomer compound according to the present invention as a cushion structure is evaluated by determining the thickness reduction rate (C _fd ) in accordance with JIS K 6400-4: B method. The thickness reduction rate of the flame-retardant solid lattice-shaped cushion of the present invention is 5.0% or less. It is preferably 2.0% or less, more preferably 1.0% or less, and most preferably 0.5% or less. This is because if it is 5.0% or less, the cushion having the structure according to the present invention prevents sagging due to use and satisfies the required excellent durability.

≪Action and effect of flame retardant solid lattice shaped cushion≫
In the conventional cushion, when providing the flame retardancy to the cushion, it is possible to maintain the effect of preventing the displacement / twisting followability / absorption as described above and the deformation and sag of the vertical and horizontal partition walls. It becomes very difficult. It is necessary to satisfy that the material type and blending amount not only obtain physical properties satisfying flame retardancy and strain test as a viscoelastic elastomer compound material, but also function as a structure. It is. According to the flame-retardant three-dimensional lattice-shaped cushion according to the present invention, it is possible to obtain mechanical characteristics as a cushion that is not different from conventional products while having sufficient flame retardancy.

≪How to use flame retardant solid lattice cushions≫
The flame-retardant solid lattice-like cushion according to this embodiment can be used as follows. For example, an insulator for vibration isolation (with a bolt), a bolt penetrating bush, an (uneven) vibration isolation sheet, a tape, a seal, a vibration isolating member such as a chip, a bag cushioning material (for example, a shoulder bag for a school bag, a handbag) Armrests and wrist rests for PCs (also applied to mouse pads), paper feed rollers, audio-related materials (turntables, insulators, spacers, etc.), anti-vibration rubber feet for cases, faces of dolls for shoe aesthetics (skins, etc.) , Tennis rackets, insulation sheets, waterproofing sheets for utility pole protection, floor slip prevention mats, etc., film sealing products (for example, hip protectors for preventing thigh fractures in the elderly, postoperative body shape aids, rider suits, gloves (soccer Keepers, golf, skis, riders), rifle jackets (eg shoulder pads), sports shoes , Bed, high-temperature and high-pressure molding machine cushion (ceramic molding, etc.), heat conductive gel sheet (for example, for heat dissipation CPU core outer circumference, etc.), game machine vibration control pad, health care related, automotive parts (window packing cushioning material) Etc.), shock absorbers for automobile doors (sides, etc.), seats in automobiles, insoles for shoes, shock absorbers for foot care to relieve pain caused by hallux valgus or ingrown nails, etc. Shock absorbers, beds, mattresses, pillows, cushions, cushions and other miscellaneous goods, shock absorbers for bedding, elbow pads, knee pads, prevention of horse back slipping by heels, ski shoes, toe shoes, ballet shoes, Sports-related shock absorbers such as gloves, shock absorbers for transporting luggage, medical personnel to protect against fractures, injuries and injuries, and to prevent the prosthetic leg and skin from rubbing Shock absorbers for breast cancer, people who have had their breasts cut out, breast pads for swimwear and breast augmentation, artificial food for fishing, etc., and dust and debris from household items such as desks, chairs, computers, bookshelves and floors It can be applied to adsorbing cleaning supplies, as well as cosmetics such as packs, poultices, fragrances, etc., using the sustained release of oil, especially because of its flame retardancy and torsional (shearing) absorption characteristics. Application to floor slip prevention mats, beds, and automobile seats is suitable.

  Examples of the present invention will be described below, but the present invention is not limited to the following examples.

(material)
The following materials were used in preparing the viscoelastic elastomer compounds according to the examples.
Oil: Moresco White P-100 (trade name, manufactured by MORESCO, paraffinic oil)
Styrenic thermoplastic elastomer: Tuftec N504 (trade name, manufactured by Asahi Kasei Chemicals Corporation, weight average molecular weight: about 300,000, styrene content: 30% by weight)
Brominated flame retardant: FR-B (trade name, manufactured by Niho Chemical Co., Ltd., hexabromobenzene, melting point: 315 ° C.)
Antimony trioxide: AT-3 ^CN (trade name, manufactured by Suzuhiro Chemical Co., Ltd.)
Other ingredients: hindered phenolic antioxidant, phosphorus processing heat stabilizer)

Example 1
According to the formulation in Table 1, the production was carried out according to the production method described above for Example 1. More specifically, the blended components were preliminarily kneaded and extruded onto a strand having a diameter of about 5 mm at 140 ° C. with a twin screw extruder or the like, and cut into an appropriate length. The obtained compound pellets were melted at 170 ° C., poured into a mold (conforming to FMVSS No. 302), and cooled to obtain a test piece 1. In addition, the numerical value of Table 1 has displayed the weight part of each component when the sum total of oil and a styrene-type thermoplastic elastomer is 100 weight part.

(Comparative Example 1)
A test piece 2 was obtained by the same method as in Example 1 except that the composition of Comparative Example 1 in Table 1 was followed.

<Flammability test>
In accordance with the test method described above, a flammability test was performed on the test pieces 1 and 2.

(Evaluation of flammability)
The results of the flammability test were evaluated as follows. In the case of exceeding 150 mm / min, x and 150 mm / min or less were evaluated as ◯. The results are shown in Table 2.

<Tensile strength test>
In accordance with the test method described above, test pieces 1 and 2 (test piece shape: dumbbell shape No. 3) were prepared under the same conditions as in the combustion test, and a tensile strength test was performed.

(Evaluation of tensile strength)
About the result of the tensile strength test, it evaluated as follows. In the case of 0.8 MPa or more, it was marked as “◯”, and in the case of being less than 0.8 MPa, it was marked as “X”. The results are shown in Table 2.

<Elongation test at cutting>
In accordance with the test method described above, test pieces 1 to 2 (test piece shape: crescent shape) were prepared under the same conditions as in the combustion test, and an elongation test at break was performed on each of them.

(Evaluation of elongation at cutting)
About the result of the elongation test at the time of a cutting | disconnection, it evaluated as follows. When the elongation at break was 850% or more, it was evaluated as ◯, and when it was less than 850%, it was marked as x. The results are shown in Table 2.

<Tear test>
A tear test was performed on the test pieces 1 and 2 in accordance with the test method described above.

(Evaluation of tear test)
The results of the tear test were evaluated as follows. In the case of 8.0 kN / m or more, it was evaluated as ◯, and in the case of less than 8.0 kN / m, it was evaluated as x. The results are shown in Table 2.

  According to the composition table of Table 1, the three-dimensional lattice-shaped cushion structure of Structural Example 1 was prepared for the viscoelastic elastomer compounds of Example 1 and Comparative Example 1 according to the above-described production method. Specifically, the blended components were well pre-kneaded, extruded onto a strand of about φ5 mm at 140 ° C. with a twin screw extruder or the like, and cut into an appropriate length. The material was introduced from the material supply port of the molding machine, plasticized at 170 ° C., and the molten material was injected into a mold having a cavity having a desired shape. The mold temperature was set to about 60 ° C. After a proper cooling time, the structure was ejected from the mold.

<Compressive residual strain test>
According to the test method described above, a compression residual strain test was performed on the structures according to Example 1 and Comparative Example 1 obtained above (test piece shape: 5 × 5 × 3 cm, 35 ± 1 ° C., 70 ± 5%. RH x 72 hours, compression rate 50%).

(Evaluation of compression residual strain test)
About the result of the compression residual strain repetition test, it evaluated as follows. When the compressive residual strain exceeds 10.0%, x indicates 10.0% or less. The results are shown in Table 3.

<Repetitive compression residual strain test>
In accordance with the test method described above, the structure according to Example 1 and Comparative Example 1 was repeatedly subjected to a compressive residual strain test (test piece shape: 5 × 5 × 3 cm, 80000 times, compression rate 50%).

(Evaluation of repeated compression residual strain test)
The results of the repeated compression residual strain test were evaluated as follows. When the thickness reduction rate exceeds 5.0%, it was evaluated as x, and when it was 5.0% or less, it was evaluated as ◯. The results are shown in Table 3.

DESCRIPTION OF SYMBOLS 1 Cushion 2 Lateral side wall 3 Vertical direction side wall 4 Horizontal direction partition 5 Vertical direction partition 6 Rib 7 Cushion 8 Upper part 9 Lower part 10 Lateral side wall 11 Vertical direction side wall 12 Horizontal direction partition 13 Vertical direction side wall 14 Horizontal direction side wall 15 Vertical Directional Side Walls 16 Horizontal Partitions 17 Vertical Partitions 18 Cushion 19 Upper Part 20 Lower Part 21 Lateral Side Walls 22 Vertical Side Walls 23 Lateral Partitions 24 Vertical Partitions 25 Lateral Side Walls 26 Vertical Side Walls 27 Horizontal Partitions 28 Vertical Partitions 29 Sheet

Claims (11)

Aggregation of a plurality of polygons by a continuous lattice wall having a thickness reduction rate of 5.0% or less in a repeated compression residual strain test (conforming to JIS K-6400-4: 2004 B method) comprising a viscoelastic elastomer compound It is a three-dimensional lattice-shaped cushion having a honeycomb-shaped structure as a body and forming a lattice body with at least the upper part open,
A flame-retardant three-dimensional lattice-shaped cushion, wherein the viscoelastic elastomer compound contains oil, a styrene-based thermoplastic elastomer, a bromine-based flame retardant, and antimony trioxide. A honeycomb-shaped structure that is a collection of a plurality of polygons by continuous lattice walls, forming a lattice body that is open at least at the top, and compressibility, flexibility, and flexibility between the upper layer portion and the lower layer portion of the lattice body The buckling property is set to be different, and the lower layer portion is formed of a rib having a + -shaped planar shape that is lower than the height of the lattice wall from the bottom in the polygon of the honeycomb structure constituting the lattice body. A three-dimensional lattice-shaped cushion made of a viscoelastic elastomer compound with both ends formed integrally with the inner wall of the lattice wall,
A flame-retardant three-dimensional lattice-shaped cushion, wherein the viscoelastic elastomer compound contains oil, a styrene-based thermoplastic elastomer, a bromine-based flame retardant, and antimony trioxide. A honeycomb-shaped structure that is a collection of a plurality of polygons by continuous lattice walls, forming a lattice body that is open at least at the top, and compressibility, flexibility, and flexibility between the upper layer portion and the lower layer portion of the lattice body The buckling property is set to be different, and the upper layer portion is a rib having a + plane shape with a height lower than the height of the lattice wall from the upper surface portion in the polygon of the honeycomb-shaped structure constituting the lattice body. Is a three-dimensional lattice-shaped cushion made of a viscoelastic elastomer compound formed integrally with the inner wall of the lattice wall,
A flame-retardant three-dimensional lattice-shaped cushion, wherein the viscoelastic elastomer compound contains oil, a styrene-based thermoplastic elastomer, a bromine-based flame retardant, and antimony trioxide.   The viscoelastic elastomer compound has a weight ratio of 0.10 to 0.40 of the brominated flame retardant with respect to the total weight of the oil and the styrenic thermoplastic elastomer, and 0.03 to 0.15 of the three The flame retardant solid lattice-shaped cushion according to claim 1, comprising antimony oxide.   The said viscoelastic elastomer compound contains the said styrenic thermoplastic elastomer of 0.10-0.50 by weight ratio with respect to the weight of the said oil, The any one of Claims 1-4 characterized by the above-mentioned. Flame retardant solid lattice cushion.   The flame-retardant solid lattice-shaped cushion according to any one of claims 1 to 5, wherein the styrene-based thermoplastic elastomer has a weight average molecular weight of 100,000 to 500,000.   The flame-retardant three-dimensional lattice-shaped cushion according to any one of claims 1 to 6, wherein the styrene-based thermoplastic elastomer has a styrene content of 15 to 50% by weight.   The flame retardant solid lattice-shaped cushion according to any one of claims 1 to 7, wherein a melting point of the brominated flame retardant is higher than a melting point of the styrene thermoplastic elastomer.   The flame retardant solid lattice-shaped cushion according to any one of claims 1 to 8, wherein the brominated flame retardant is a component having an aromatic ring having a plurality of bromine atoms in the molecular structure. .   The flame-retardant solid lattice-shaped cushion according to any one of claims 1 to 9, wherein the oil is a paraffinic oil.   The flame-retardant solid lattice-like cushion according to any one of claims 1 to 10, wherein the flame-retardant solid lattice cushion is used for an automobile interior.

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