KR101936580B1 - A seating seat - Google Patents

Abstract

The present invention relates to a multipurpose seating seat having a seat-shaped body for a user to directly sit thereon and, more specifically, provides a multipurpose seating seat, wherein a hip mounting unit concavely recessed is formed at both sides of a surface of the body for hips of the user to be mounted when the user sits, and a thigh mounting unit concavely extending to a front end of the body from another front end of the hip mounting unit is formed for both thighs to be mounted when the user sits. Moreover, a cutting unit of which a portion is cut is formed to be folded at both sides of a lower portion of the body when both sides of the body are bent, and a grip unit is provided in both end portions of the body for both sides of the body to be pulled and folded.

Description

A seating seat < RTI ID = 0.0 >

The present invention relates to a multi-purpose seating sheet which can be used in place of a seat portion of a chair and a sofa, but is also capable of being directly seated in place of a cushion in a room and having a protection function against natural disasters such as earthquakes.

Generally, the seat used in the chair and the room has a circular or square shape, and the surface is kept flat to support the user's hips.

These sheets are responsible for absorbing and distributing some of the load of the user. Recently, however, there has been an increase in the number of students and workers who sit and study for a long time in addition to the interest in health.

Korean Patent Laid-Open No. 10-2004-0027779 discloses a cushioning seat for a chair, wherein a center portion of the body constituting the cushioning seat for a chair is provided with a hips A support portion protruding outwardly and upwardly to surround the hip portion of the human body is formed on both sides of the rear portion of the seating portion, and a front portion of the body is formed with a front portion having a larger inclination degree, And a downward inclined portion formed in a shape of an arcuate groove having a lower inclination toward the front so as to lightly contact with the back surface of the thigh of the human body is formed on both sides of the central protruding portion.

The Korean Patent Laid-Open Publication No. 10-2004-0027779 discloses that the center and rear portions of the front portion are formed to be relatively protruded so that when the chair user sits on the cushioning seat, the elasticity of the cushioning sheet itself and the protrusions formed on the center and rear portions of the front portion, Not only can the lower body of the human body be wrapped around the buttocks of the body, but also the backrest of the human body is relieved by the recessed groove formed partly at the front part, so that the blood circulation can be facilitated. So that the reliability of the chair can be improved.

The present invention also relates to a multipurpose seating seat for improving the safety of a user in the event of a natural disaster such as an earthquake and a fire, as well as a sitting posture of a user.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hip rest and a thigh rest which are formed on a body so that a user can be stably placed on the body to maintain a correct sitting posture, Both sides of the body are folded through the grip portion and the incision portion provided on both sides and the lower side of the body so as to protect the head portion of the user from the falling objects generated during the earthquake, There is.

In addition, since the body is made of a functional masterbatch made of a polyethylene resin, a blowing agent masterbatch, a cross-linking agent masterbatch and a flame retardant masterbatch, it is excellent in workability and can be conveniently used in winter, It is another object of the present invention to provide a multi-purpose seating sheet capable of minimizing the spread of a flame by preventing the drop of the molten resin and minimizing the generation of smoke when a fire occurs.

In order to accomplish the above object, the present invention provides a seat for a seat for a user to directly sit on, a hip seating part recessed on both sides of the body surface so that the user can sit on the seat when the seat is seated A thigh seating part extending concave from the front end of the hip seating part to the front end of the body so that both thighs can be seated when the user is seated, Wherein the gripping portion includes a pair of elongated straps extending on both sides of the body so as to be spaced apart from each other, and an elongated strap extending from the body of the elongated strap, And a gripping pad for gripping both sides of the body so that the user grips the separated portion with the hand, In the multi-purpose sheet that is occupied Velcro is formed, respectively provided on both sides of the side end portion of the body so that the extension jangkkeun strap can be removed,
The body is formed by extruding a raw material containing 20 to 25% by weight of a polyethylene resin, 50 to 60% by weight of a blowing agent master batch, 7 to 10% by weight of a master batch of crosslinking agent, and 10 to 20% under,
The polyethylene resin is composed of 70 to 80 parts by weight of LDPE (Low Density Polyethylene) and 20 to 30 parts by weight of m-LLDPE (Metallocene Linear Low Density Polyethylene)
Wherein the foaming agent masterbatch comprises 60 to 70 parts by weight of low density polyethylene (LDPE) and at least one foaming agent 30 to 40 selected from the group consisting of azodicarbonamide, azobisisobutyronitrile, benzenesulfonhydrazide, By weight,
The master batch of the crosslinking agent is composed of 92 to 98 parts by weight of LDPE (Low Density Polyethylene) and 2 to 8 parts by weight of a crosslinking agent,
The flame retardant master batch contains 20 to 30 parts by weight of LDPE, 10 to 15 parts by weight of antimony trioxide (Sb ₂ O ₃ ), 35 to 40 parts by weight of decabromodiphenyl ether (DBDPE), magnesium hydroxide (MgOH ₂ ) 10 to 15 parts by weight of a diatomaceous earth and 8 to 13 parts by weight of diatomaceous earth.

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As described above, according to the present invention, the hip seating portion and the thigh seating portion formed on the body allow the user to be stably placed on the body and maintain the correct seating posture so that the crowd of the spine is not generated, It has the effect of improving the learning or business ability for the living students and workers.

In addition, both sides of the body are folded through the grip portion and the cut-out portion provided on both sides and the lower side of the body, thereby protecting the head portion of the user from falling objects generated during the earthquake.

In addition, since the body is made of a functional masterbatch made of a polyethylene resin, a blowing agent masterbatch, a cross-linking agent masterbatch and a flame retardant masterbatch, it is excellent in workability and can be conveniently used in winter, The present invention has the effect of preventing diffusion of the flame as much as possible by preventing the drop phenomenon of the molten resin and minimizing the generation of smoke when a fire occurs.

1, 2 and 3 are views showing a preferred embodiment of the present invention,
Fig. 4 is an exemplary view showing a preferred form of folding the body through the incision of the present invention; Fig.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 4 is a view illustrating a preferred embodiment in which the body is folded through the incision part of the present invention. FIG. 4 is a perspective view of a seat part of a chair and a sofa according to the present invention, The present invention relates to a multi-purpose seating sheet including a body 1 in a form of a sheet which can be used while being seated directly in place of a cushion in a room.

As shown in FIGS. 1 to 4, the multi-purpose seating sheet of the present invention is formed with a hip seating portion 10 recessed on both sides of the surface of the body 1 so that the user can sit on the seat when the user sits.

A thigh seating part 20 is formed at the tip of the hip seating part 10 so as to allow the user to sit on both thighs when the user is seated.

That is, the hip seating portion 10 and the thigh seating portion 20 formed on the body 1 can be stably placed on the body 1 to maintain a correct seating posture so that a crowd of the spine is not generated .

On both sides of the lower portion of the body 1, a cutout portion 30 is formed in which the body 1 is partially cut so as to be folded when the both sides of the body 1 are bent. At both ends of the body 1, And a grip portion 40 that can be folded and pulled is provided.

That is, when a natural disaster such as an earthquake occurs, both sides of the body 1 are folded through the incision 30 when both sides are pulled by using the grip portion 40 in a state where the body 1 is urgently put on the head, ) Protects the upper part of the head and the folded part of the body 1 protects both sides of the head and both sides of the head so as to protect the user's head against sudden natural disasters such as earthquakes, It is possible to protect the user from falling objects and drastically reduce the casualty damage.

Wherein the body 1 including the buttocks seat 10, the thigh seat 20 and the incision 30 comprises 20 to 25% by weight of a polyethylene resin, 50 to 60% by weight of a blowing agent master batch, 10% by weight of a flame retardant and 10-20% by weight of a master batch of a flame retardant is processed through an extruder, followed by foaming.

Polyethylene resin has characteristics such as impact resistance, flexibility, chemical resistance and water resistance as well as properties that are easy to process due to its high strength and light weight. It is an optimal material for a seat for supporting a user's lower body, Master batch, and flame retardant master batch.

These polyethylene resins are obtained by polymerizing ethylene. Various PEs are produced by polymerization conditions such as pressure, catalyst and the like. They can be classified into LDPE, LLDPE, MDPE, and HDPE according to their density and molecular structure.

The main characteristics of conventional PE are related to the melt index (MI), the molecular weight distribution (MWD) and the density. When the molecular weight distribution is narrow, the impact strength is increased and the warpage after molding is low , A broader molecular weight distribution results in better processability and better environmental stress crack resistance (ESCR). Further, as the density increases, the bending strength, the heat distortion temperature, and the like are lowered and the MI is lowered. As the density is lowered, the bending strength and the like are lowered and the MI is increased.

For reference, ESCR refers to resistance to chemicals that cause stress cracks on the surface or inside of a molded article due to a tensile stress smaller than tensile strength, and acids, alcohols, silicones, detergents, hydrocarbons, etc., Because of the nature of the material, it is necessary to select a material with a high ESCR for the product to be contacted.

On the other hand, LDPE (Low Density Polyethylene) is mainly used as a polyethylene (PE) resin for a foamable mold. It has a low density of 0.915 to 0.920 g / cm3 and a melt index (MI) of 10 to 25 g / Flexibility and heat stability. However, in the present invention, m-LLDPE (Metallocene Linear Low Density Polyethylene) is appropriately mixed to improve physical properties.

The m-LLDPE polymerized by a metallocene catalyst has a density of 0.912 to 0.925 g / cm 3 and an MI of 3.6 to 5.5 g / 10 min, which is easy to mold and has high impact strength and flexibility The present invention is characterized in that LDPE: m-LLDPE is used in a range of 70 to 80: 20 to 30 By mixing them in a weight ratio, it becomes possible to increase the density of the polyethylene (PE) resin and increase the flexural strength of the foam due to the low melt index (MI) and to maintain the flexibility well. In addition, tensile strength, hardness, heat resistance, and chemical resistance are improved and stress cracks are reduced due to the increase in the density of the polyethylene resin.

The foaming agent master batch has the function of absorbing and dispersing the user's load in addition to the feeling of padding by foaming the sitting seat and absorbing and dispersing the load applied to the lower body including the user's bones, It is possible to prevent the diseases caused by the load applied to the lower body while improving the learning or working ability, thereby contributing to the maintenance of the user's health, and also having the heat insulating property, so that it can be used in the winter season.

The master batch of the blowing agent is composed of 60 to 70 parts by weight of LDPE (Low Density Polyethylene) and 30 to 40 parts by weight of a blowing agent. If the chemical foaming agent is compatible with the polyethylene resin, there is a specific limitation Generally, it is possible to use any one or more selected from the group consisting of azodicarbonamide, azobisisobutyronitrile, benzenesulfonhydrazide, and the like, so that detailed description thereof will be omitted. However, when the foaming agent master batch is formulated with LDPE 60 to 70: 30 to 40 parts by weight as a foaming agent, it is possible to form a normal foam due to sufficient foaming. When the content exceeds the above range, not only heat resistance shrinkage but also mechanical properties Which is undesirable.

The master batch of the crosslinking agent is composed of 92 to 98 parts by weight of LDPE (Low Density Polyethylene) and 2 to 8 parts by weight of a crosslinking agent. Examples of the crosslinking agent usable in the present invention include organic peroxides such as cyclohexanone peroxide, Propyl carbonate, t-butyl peroxylaurate, t-butyl peroxyacetate, di-t-butyl diperoxyphthalate, t-dibutylperoxymaleic acid, t-butyl cumyl peroxide, t- , t-butyl peroxybenzoate, dibenzoyl peroxide, dicumyl peroxide, 1,3-bis (t-butylperoxyisopropyl) benzene, methyl ethyl ketone peroxide, di- (2,4-dichlorobenzoyl) (T-butylperoxy) -3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5- (t-benzoylperoxy) hexane, 2,5-dimethyl Butyl peroxide, 2,5-di (t-butylperoxy) hexane, di-t-butyl peroxide, 2,5- , 4-bis (t -Butylperoxy) valerate, and a, a'-bis (t-butylperoxy) diisopropylbenzene, and the like.

If the content of the crosslinking agent is insufficient, the crosslinking agent masterbatch can not be formed due to insufficient crosslinking. If the content exceeds the above range, the degree of crosslinking will increase sharply to cause over-crosslinking, thereby making normal foam molding difficult.

Flame retardant masterbatch is LDPE (Low Density Polyethylene) 20 ~ 30 parts by weight of antimony trioxide _{(Sb 2 O 3) 10 ~} 15 parts by weight, Decabromodiphenyl ether (Decabromodiphenyl Ether, DBDPE) 35 ~ 40 parts by weight, Magnesium hydroxide (MgOH ₂ ), and diatomaceous earth 8-13 parts by weight. This is because it improves the flame retardancy of the seat, prevents the drop of the molten resin when a fire occurs, minimizes the generation of smoke, Flame retardant formulation in the flame retardant master batch was improved to minimize diffusion.

For reference, antimony trioxide (Sb ₂ O ₃ ) is widely used for flame retarding purposes, and is usually used together with a halogen flame retardant material. Since the halogenated antimony generated by these reactions plays a role of flame retarding, Decabromodiphenyl Ether (DBDPE), a flame retardant, was used. In general, the brominated flame retardant has excellent physical properties and relatively low price. However, DBDPE is known to contain less harmful substances such as dioxin than other brominated flame retardants such as TBBPA (Tetrabromobisphenol-A) and DBDPO (Decabromodiphenyl Oxide) have.

On the other hand, inorganic flame retardants such as aluminum hydroxide (Al (OH) ₃ , ATH) are not a perfect substitute for brominated flame retardants because of their low physical properties despite low cost and environment friendliness. There is a drawback that the quality of the finished product is lowered. In addition, the use of flame retardant, which is a substitute for brominated flame retardants, is limited in scope and is not only compromising environmental regulations but also losing its price competitiveness.

The magnesium hydroxide (MgOH ₂ ) is harmless to the human body and is used to neutralize acidic wastewater. The endothermic decomposition point is as high as 332 ° C, which increases the ignition point and reduces smoke when added to other substances or reactions. [Mg (OH) 2 (s) - > MgO (s) + H2O (g)] is also used as a coating for preventing fire since it absorbs oxygen during combustion and generates water and removes a combustible material. (MgOH ₂ ) in an amount of about 10 to 15 parts by weight based on the total amount of the master batch of the flame retardant in consideration of dispersibility, moldability, and the like, thereby improving the flame retardancy and preventing the drop of the molten resin It is confirmed that the diffusion of the flame can be suppressed as much as possible by minimizing the occurrence of the flame.

The flame retardant masterbatch contains diatomaceous earth in the form of powder. The diatomaceous earth is mainly composed of silicic acid (SiO ₂ ) and is a poor conductor of heat with high water absorption because of its fine porous structure, and is known to have heat insulation and heat resistance. In addition, diatomaceous earth is more resistant to shrinkage than asbestos or goto (magnesium oxide) at temperatures above 525 ° C, and is an effective insulation that is not broken by heat, so it is also used as a refractory for equipment that must maintain a high temperature. It is also used as a soundproofing agent for noise, as an adsorbent and a filter medium for refining pharmaceuticals and foods.

For this reason, the flame retardant masterbatch contains diatomaceous earth in an amount of about 8 to 13 parts by weight, thereby absorbing the smoke generated by the fire, thereby reducing the generation of toxic gases and reducing the spread of the flame.

By including a plurality of functional masterbatches as described above, the workability is excellent and the composition of the master batch of the flame retardant agent is optimally mixed to thereby provide excellent flame retardancy, prevent the drop of the molten resin during a fire, So that the diffusion of the flame can be suppressed as much as possible.

The grip section 40 includes a pair of elongated straps 41 extending on both sides of the body 1 and spaced apart from the body 1 of the elongated strap 41, And a gripping pad 43 for gripping the user to hold the body 1 so that both sides of the body 1 are folded.

That is, the elongated strap 41 is worn by a user or fixed to a chair and a couch so that the body 1 can be stably stowed by the user. When the natural strap 43 is used, It is pulled so as to apply force to both sides of the body 1 in a state of being directly held and used so that both sides of the body 1 can be folded more smoothly.

A Velcro 45 is formed at each end of the elongated strap 41 so that the elongated strap 41 provided on both sides of the body 1 can be attached to and detached from the end of the elongated strap 41, So that it can be freely detached so as to be worn on the user or fixed to the chair and sofa.

10: hip seating part 20: thigh seating part
30: incision section 40:
41: extension cord 43:
45: Velcro

Claims (5)

A hip seat (10) is formed on both sides of the body (1) so that the hip can be seated when the user is seated, and the hip seat (10) A thigh seat part 20 is formed at the tip end of the buttock seating part 10 so as to allow both thighs to be seated when the seat 1 is seated, A cut portion 30 is formed in the body 1 so as to be folded when both sides of the body 1 are folded and both ends of the body 1 are provided with grip portions 40 The grip portion 40 includes an extension cord 41 extending on both sides of the body 1 so as to be spaced apart from each other by a pair, (43) for gripping the body (1) so that both sides of the body (1) are folded, In the multi-purpose sheet that is occupied Velcro 45 so that each extension strap (41) provided on either side of the end side of the body (1) can be removed in jangkkeun 41 is formed,
The body 1 is produced by extruding a raw material comprising 20 to 25% by weight of a polyethylene resin, 50 to 60% by weight of a blowing agent master batch, 7 to 10% by weight of a master batch of crosslinking agent, and 10 to 20% Foamed,
The polyethylene resin is composed of 70 to 80 parts by weight of LDPE (Low Density Polyethylene) and 20 to 30 parts by weight of m-LLDPE (Metallocene Linear Low Density Polyethylene)
Wherein the foaming agent masterbatch comprises 60 to 70 parts by weight of LDPE (Low Density Polyethylene) and at least one foaming agent 30 to 40 selected from the group consisting of azodicarbonamide, azobisisobutyronitrile, benzenesulfonhydrazide, By weight,
The master batch of the crosslinking agent is composed of 92 to 98 parts by weight of LDPE (Low Density Polyethylene) and 2 to 8 parts by weight of a crosslinking agent,
The flame retardant master batch contains 20 to 30 parts by weight of LDPE, 10 to 15 parts by weight of antimony trioxide (Sb ₂ O ₃ ), 35 to 40 parts by weight of decabromodiphenyl ether (DBDPE), magnesium hydroxide (MgOH ₂ ) 10-15 parts by weight, and diatomaceous earth 8-13 parts by weight. delete delete delete delete

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