U.S. patent application number 14/008342 was filed with the patent office on 2014-01-23 for synthetic wood having elastic layer.
This patent application is currently assigned to LG HAUSYS, LTD.. The applicant listed for this patent is Dong Jin Kim, Kyung Gu Nam, Jung Il Son. Invention is credited to Dong Jin Kim, Kyung Gu Nam, Jung Il Son.
Application Number | 20140023871 14/008342 |
Document ID | / |
Family ID | 46932031 |
Filed Date | 2014-01-23 |
United States Patent
Application |
20140023871 |
Kind Code |
A1 |
Kim; Dong Jin ; et
al. |
January 23, 2014 |
Synthetic Wood Having Elastic Layer
Abstract
The present invention relates to a synthetic wood having an
elastic layer, wherein a synthetic wood layer and the elastic layer
formed at one side of the synthetic wood layer are formed
integrally. According to the present invention, since the elastic
layer formed of a rubber material is provided on the upper surface
of the synthetic wood, it is possible to increase the contact
surface area upon walking and thus improve the anti-slip
performance.
Inventors: |
Kim; Dong Jin; (Daejeon,
KR) ; Nam; Kyung Gu; (Daejeon, KR) ; Son; Jung
Il; (Yongin-si,, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Kim; Dong Jin
Nam; Kyung Gu
Son; Jung Il |
Daejeon
Daejeon
Yongin-si, |
|
KR
KR
KR |
|
|
Assignee: |
LG HAUSYS, LTD.
Seoul
KR
|
Family ID: |
46932031 |
Appl. No.: |
14/008342 |
Filed: |
February 14, 2012 |
PCT Filed: |
February 14, 2012 |
PCT NO: |
PCT/KR2012/001113 |
371 Date: |
September 27, 2013 |
Current U.S.
Class: |
428/492 ;
156/244.11 |
Current CPC
Class: |
B32B 2471/00 20130101;
B32B 2307/744 20130101; B32B 2264/067 20130101; E04F 15/10
20130101; B32B 21/02 20130101; B32B 2274/00 20130101; Y10T
428/31826 20150401; B32B 21/08 20130101; B32B 2270/00 20130101 |
Class at
Publication: |
428/492 ;
156/244.11 |
International
Class: |
E04F 15/10 20060101
E04F015/10 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 30, 2011 |
KR |
10-2011-0028621 |
Claims
1. A synthetic wood having an elastic layer, wherein a synthetic
wood layer and the elastic layer formed at one side of the
synthetic wood layer are formed integrally.
2. The synthetic wood of claim 1, wherein the synthetic wood layer
is integrally formed with the elastic layer through a dual
extruding process.
3. The synthetic wood of claim 1, wherein the elastic layer is
composed of 15 to 35 parts by weight of a synthetic resin, 5 to 15
parts by weight of a thermoplastic elastomer, 50 to 70 parts by
weight of wood flour and 1 to 15 parts by weight of an
additive.
4. A method of manufacturing a synthetic wood having an elastic
layer, comprising: extruding a synthetic wood layer through one
side of an extrusion mold; extruding an elastic layer through the
other side of the extrusion mold; forming the synthetic wood layer
and the elastic layer integrally with a boundary therebetween; and
cooling the synthetic wood, in which the synthetic wood layer and
the elastic layer are integrally formed, to a predetermined
temperature.
5. The method of claim 4, further comprising cutting the cooled
synthetic wood having the elastic layer in a predetermined length.
Description
TECHNICAL FIELD
[0001] The present invention relates to a synthetic wood having an
elastic layer, and more particularly to a synthetic wood having an
elastic layer, which a rubber material is provided thereon to
increase surface elasticity thereof and improve its anti-slip
function, thereby increasing a contact surface area upon walking
and thus improving slip resistance.
BACKGROUND ART
[0002] Recently, the synthetic wood is being recognized as a
substitute for a general wooden material due to its excellent
exterior effect and environmentally friendly characteristics.
[0003] The synthetic wood has been used widely in the United states
and Japan from about 15 years ago and it was from about 3 or 4
years ago to be used in earnest in Korea. Due to its harmlessness
to human body, recyclability, environmentally friendly
characteristics, excellent heat resistance and durability, the
future relevant market is expected to be increased. The synthetic
wood is being used widely as an alternative construction material
which can be used in a public place such as a park, a walk and a
school.
[0004] Typically, in manufacturing processes for the synthetic
wood, a plasticizer, an adhesive, a pigment, an infrared blocker
and a stabilizer are mixed at high temperature, and wood flour and
rice husks are further mixed in a small amount and then the mixture
is extrusion-molded with high pressure.
[0005] In other words, to manufacture the synthetic wood, the
mixture of the plastic and wood flour is injection-molded into a
certain shape. The mixture is extruded with high pressure, thereby
injection-molding a product.
[0006] A deck product which is used in a footpath and a walk is a
flooring material on which many people walk. It is important to
prevent negligent accidents due to the slip, and particularly, in
case of being moisture on the road surface after the snow or rain,
there is a danger of injury due to the slip.
[0007] Therefore, there has been proposed various method of
improving the anti-slip function. For example, there are a method
of forming an uneven pattern on the synthetic wood, a method of
forming fine protrusions or projections on the synthetic wood by
adding various inorganic materials or using a foaming or etching
process, or a brushing method of a surface of the synthetic wood to
provide a high surface roughness.
[0008] However, in case of the method of forming the uneven pattern
on the synthetic wood, since foreign substances such as moisture
and sands can be easily accumulated thereon, it becomes further
slippery.
[0009] And in case of the method of adding the inorganic materials
or the brushing method, the anti-slip functions can be maintained
at the initiatory stage, but normal wear and tear occurs as times
goes by. Thus, there is a problem that the worn portion thereof
becomes further slippery.
[0010] Further, in case of improving the surface roughness using
the inorganic materials, if a pedestrian, particularly a child
falls down, body parts such as hands and a face may be scratched or
wounded.
[0011] Therefore, it has been required to develop new synthetic
wood having excellent anti-slip performance while maintaining its
own properties and appearance.
DISCLOSURE OF INVENTION
Technical Problem
[0012] An embodiment of the present invention is directed to
providing a synthetic wood having an elastic layer, on which a
rubber material is provided so as to form the surface elastic
layer, thereby increasing a contact surface area upon walking and
thus improving its anti-slip function.
Solution to Problem
[0013] To achieve the object of the present invention, the present
invention provides a synthetic wood having an elastic layer,
wherein a synthetic wood layer and the elastic layer formed at one
side of the synthetic wood layer are formed integrally.
[0014] Preferably, the synthetic wood layer is integrally formed
with the elastic layer through a dual extruding process.
[0015] Preferably, the elastic layer is composed of 15 to 35 parts
by weight of a synthetic resin, 5 to 15 parts by weight of a
thermoplastic elastomer, 50 to 70 parts by weight of wood flour and
1 to 15 parts by weight of an additive.
[0016] Further, the present invention provides a method of
manufacturing a synthetic wood having an elastic layer, including
extruding a synthetic wood layer through one side of an extrusion
mold; extruding an elastic layer through the other side of the
extrusion mold; forming a boundary between the synthetic wood layer
and the elastic layer; and cooling the synthetic wood, in which the
synthetic wood layer and the elastic layer are integrally formed,
to a predetermined temperature.
[0017] Further, the method may further include cutting the cooled
synthetic wood having the elastic layer in a predetermined
length.
Advantageous Effects of Invention
[0018] According to the present invention as described above, it is
possible to provide a synthetic wood having an elastic layer, on
which a rubber material is provided so as to form the surface
elastic layer, which maintains the synthetic wood's own appearance
and properties having environmentally friendly characteristics,
excellent heat resistance and durability.
[0019] And, according to the present invention, it is possible to
provide a synthetic wood having an elastic layer, on which a rubber
material is provided so as to form the surface elastic layer,
thereby increasing a contact surface area upon walking and thus
improving its anti-slip function.
BRIEF DESCRIPTION OF DRAWINGS
[0020] FIG. 1 is a view of a synthetic wood having an elastic layer
according to an embodiment of the present invention.
DETAILED DESCRIPTION OF MAIN ELEMENTS
[0021] 10:elastic layer 20: synthetic wood layer
[0022] 100: synthetic wood
MODE FOR THE INVENTION
[0023] Hereinafter, the embodiments of the present invention will
be described in detail with reference to accompanying drawings.
[0024] Herein, the same reference numerals are given to the same or
corresponding parts.
[0025] Referring to FIG. 1, a synthetic wood 100 having an elastic
layer 10 according to an embodiment of the present invention is
characterized in that the elastic layer 10 is integrally formed on
an upper surface of a synthetic wood layer 20, and particularly,
the elastic layer 10 is integrally formed on the upper surface of
the synthetic wood layer 20 by a dual extrusion method.
[0026] Hereinafter, each construction element of the synthetic wood
100 having the elastic layer 10 will be described detailedly.
[0027] In the synthetic wood 100 having the elastic layer 10
according to the present invention, the synthetic wood layer 20 is
manufactured by mixing a plasticizer, an adhesive, a pigment, an
infrared blocker and a stabilizer at high temperature, further
mixing wood flour and rice husks in a small amount and then
extruding the mixture with high pressure. A composition and a
composition ratio thereof are changed according to its
manufacturers.
[0028] Further, with respect to the elastic layer 10 composed of 25
parts by weight of a synthetic resin, 10 parts by weight of a
thermoplastic elastomer, 60 parts by weight of wood flour and 5
parts by weight of an additive, the slip resistance was measured in
the state that a static load of 60 kg was applied thereto, on the
basis of KS M 3510 (a testing method of a polymer flooring
material). That is, the slip resistance was measured by a
reciprocating friction test of about 10,000 times using shoes
having a urethane sole, and a result thereof is shown in table
1.
TABLE-US-00001 TABLE 1 Frictional Frictional coefficient before
coefficient after Sample wearing wearing Embodiment of the present
0.63 0.63 invention Conventional product 0.52 0.46 (comparative
example 1) Product having high surface 0.70 0.52 roughness
(comparative example 2)
[0029] Therefore, according to the synthetic wood 100 having the
elastic layer of the present invention, since the thermoplastic
elastomer is added to a surface thereof in order to permanently
increase the surface elasticity, it is possible to increase a
contact surface area between pedestrian's shoes (mostly, rubber)
and the synthetic wood 100 and thus improve the anti-slip
performance.
[0030] In other words, when a concentrated load of a pedestrian
having an average weight of about 60 kg is applied to upper surface
of the synthetic wood, i.e., the elastic layer 10, a product of the
present invention having high surface elasticity is pushed down in
a moment, and the contact surface area between the pedestrian's
shoes and the synthetic wood 100 is increased, thereby providing
excellent anti-slip performance.
[0031] Generally, the harder and stiffer the surface is, the more
the surface is worn. However, since the synthetic wood having the
elastic layer according to the embodiment of the present invention
has high elasticity, the wearing is reduced, thereby providing
excellent anti-slip performance.
[0032] Hereinafter, a method of manufacturing the synthetic wood
having the elastic layer according to an embodiment of the present
invention will be described.
[0033] In the method of manufacturing the synthetic wood having the
elastic layer according to the embodiment of the present invention
includes s step S100 of extruding a synthetic wood layer through
one side of an extrusion mold; a step S200 of extruding an elastic
layer through the other side of the extrusion mold; a step S300 of
forming a boundary between the synthetic wood layer and the elastic
layer; and a step S400 of cooling the synthetic wood, in which the
synthetic wood layer and the elastic layer are integrally formed,
to a predetermined temperature.
[0034] Herein, the step S100 of extruding the synthetic wood layer
and the step S200 of extruding the elastic layer through the other
side of the extrusion mold are performed at a front side of the
extrusion mold, and the steps S300 and S400 are performed at a rear
side thereof.
[0035] The method may further include a step S500 of cutting the
synthetic wood having the elastic layer in a predetermined
length.
[0036] The embodiments of the present invention, as described
above, are just examples, and thus the present invention is not
limited to them.
[0037] According to the present invention, the rubber material is
provided on the upper surface of the synthetic wood so as to form
the surface elastic layer. Therefore, it is possible to provide the
synthetic wood which has the environmentally friendly
characteristics, excellent heat resistance and durability while
maintaining its own properties and appearance.
[0038] Further, according to the synthetic wood of the present
invention, since the contact surface area is increased upon the
walking, the slip resistance is improved.
[0039] While the present invention has been described with respect
to the specific embodiments, it will be apparent to those skilled
in the art that various changes and modifications may be made
without departing from the spirit and scope of the invention as
defined in the following claims.
* * * * *