GB2513207A

GB2513207A - Non-glue PVC non-slip floor tile and preparation method therefor

Info

Publication number: GB2513207A
Application number: GB1321794.8A
Authority: GB
Inventors: Benyuan Chen
Original assignee: DONNGGUAN MEIJER PLASTIC PRODUCTS CO Ltd
Current assignee: DONNGGUAN MEIJER PLASTIC PRODUCTS CO Ltd
Priority date: 2012-02-08
Filing date: 2012-02-08
Publication date: 2014-10-22
Anticipated expiration: 2032-02-08
Also published as: DE112012002666T5; DE112012002666B4; GB2513207B; WO2013116997A1; GB201321794D0

Abstract

Disclosed are a non-glue PVC non-slip floor tile and a preparation method therefor. Flexible lines are formed on the bottom surface of the PVC non-slip layer of the non-slip floor tile by hot pressing; and the lines formed by hot pressing comprise a plurality of seal inequilateral hexagon protruding ribs being connected continuously and repetitively. The material formulation of the PVC non-slip layer comprises by weight: 58.5%-63.5% of PVC with polymerization degree of 1000, 34.9-39% of plasticizing agent, 0.95%-2.1% of stabilizing agent, 0.5%-0.69% of toner powder, and 0.06%-0.08% of calcium carbonate of 800 mesh. The required softness obtained by using particular formulation dosage of the non-slip layer, combined with the inequilateral hexagon non-slip lines having the particular size and shape, enables the slip coefficient of the non-slip floor tile to be more than 1.5, thus the bottleneck of improving the non-slip performance in the industry of plastic floor tiles is overcome.

Description

TITLE

NON-GLUE PVC NON-SLIP FLOOR TILE AND PREPARATION METHOD

THEREFOR

BACKGROUND OF THE TNVENTION

Field of the Invention

100011 The present invention relates to techniques in plastic floor field, in particular relates to an non-glue non-slip PVC floor tile provided with high non-slip coefficient and a preparing method thereof.

Description of the Related Art

1 0 [0002] As everybody knows, a floor cover material, generally made of high molecular compound (mainly composed of resin) and referred to a plastic floor, includes the following characteristics. Firstly, the plastic floor is relatively cheaper, compared to carpets, wood floorings, stone materials and ceramic floor materials. The plastic floor has excellent decoration effects based on a variety of types, designs, patterns, colors, textures and shapes thereof and high density special structures capable of satisfying the requirements of different users, such as realistically simulated natural material of lines of wood, marbling, carpet and granite. Further, the plastic floor is characterized with multiple functions such as comfortable feet feel, warm feel, heat isolation, acoustic isolation and damp proof Because cement and sand or going in for large-scale construction are not needed, the plastic 2 0 floor can be conveniently and rapidly built and laid by dedicated paste, and a user is further allowed to be involved in design, material selection and construction processes. In weight comparison, the light plastic floor is generally one-tenth of the wood floor, one twentieth of the ceramic tile floor, and one-twenty fifth of the stone material, so that the light plastic floor can be easily moved and constructed than the wood floor, the ceramic tile floor and the stone material, preferably suitable for at least three-story building and office constructions and capable of reducing the supported weight of the buildings and providing safety. Moreover, the plastic floor having excellent wear resistance and long life span is capable of being conveniently cleaned, washed and dried. Therefore, based on the features and advantages of the plastic floor, it is understood the plastic floor is suitably applied to the related markets.

10003] Research developments on slip resistance of the plastic floors are constantly studied in the related fields, In the performance of the plastic floor, the slip resistance is referred to the non-slip property of the plastic floor, and the non-slip coefficient is an important factor to determine the slip resistance of the plastic floor. At present, an non-slip pattern formed of regular hexagon, circle or wave-shape is disclosed to be disposed on a bottom surface of the plastic floor which is utilized to contact a ground surface, it is known that the non-slip coefficient of the conventional plastic floor is at most H, and the improper design and combination of these patterns still cannot advancedly increase the non-slip coefficient of the plastic floor, BRIEF SUMI%IARY OF THE INVENTION [0004] In view of this, the main purpose of the present invention is to provide an non-glue non-slip PVC floor tile and a preparing method thereof, capable of being characterized with excellent non-slip property, 2 0 [0005] For realizing the purposes above, the present invention adopts the following technical projects.

[0006] A circular-type non-glue non-slip PVC floor tile includes a PVC non-slip layer, a PVC boftom material layer, a PVC middle material layer, a PVC printed layer and a PVC wear-resistant layer which are bottom-up sequentially stacked and combined by thermal pressing. The PVC non-slip layer includes a bottom surface utilized to contact a ground surface and formed with a flexible thermal-pressed pattern by thermal pressing. The thermal-pressed pattern includes a plurality of continuously and repetitively connected, closed and non-equilateral hexagonal protruded ribs circumferentially formed as a closed concave-chambered sucking disk.

[0007] A material ingredient of the PVC non-slip layer measured by weight includes degree of polymerization of 1000 of PVC from 58,5% to 63.5%, plasticizer from 34.9% to 39%, stabilizer from 0.95% to 2.1%, color powder from 0.5% to 0.69% and 800 mesh calcium carbonate from 0.06% to 0.08%, which are amounted to tOO%, 10008] Further, the non-equilateral hexagonal protruded rib has a shape 1 0 circumferentially formed by two isometric and parallel positive short sides and two pairs of two parallel slanted long sides wherein the length of each positive short side is ranged from 4 mm to 8 mm, the length of each slanted long side is ranged from 5 mm to 9 mm, the length of the slanted long side is absolutely greater than that of the positive short side, and the positive short side and the slanted long side have same width of t mm and same height ranged from 0.25mm to 0.35 mm.

[0009] A method for preparing the non-glue non-slip PVC floor tile includes the steps of: [0010] providing a combination processing of a first thermal-pressing by bottom-up sequentially stacking the PVC non-slip layer, the PVC bottom material layer and the PVC middle material layer to thermally press and laminate into a supporting body, wherein a heating temperature of 130 Celsius for 24 minutes is provided in a sectionally-pressurized type thermal pressing process which includes a first sectional pressurization of 50-60 kgf/cm2 from 24 to 27 minutes, a second sectional pressurization of 60-80 kgf/cm2 from I to 3 minutes, and a third sectional pressurization of 110-130 kgf/cm2 from 15 to 20 minutes; and 100111 providing a second thermal-pressing pattern processing by bottom-up sequentially stacking the PVC wear-resistant sayer and the PVC printed layer on the supporting body for thermal pressing, wherein a heating temperature of 130 Celsius for 24 minutes is provided in a sectionally-pressurized type thermal pressing process which includes a first sectional pressurization of 50-60 kgf/cm2 from 24 to 27 minutes, a second sectional pressurization of 65-95 kgf/cm2 from I to 3 minutes, and a third sectional pressurization of 110-140 lcgf/cm2 from 20 to 24 minutes; in the thermal pressing process, the PVC wear-resistant layer is combined with the PVC printed layer, the PVC printed layer is combined with the PVC middle material layer of the supporting body, and the 1 0 bottom surface of the PVC non-slip layer and a top surface of the PVC wear-resistant layer are simultaneously formed with patterns by thermal pressing, wherein the thermally-pressed pattern formed on the bottom surface of the PVC non-slip layer includes a plurality of continuously and repetitively connected, closed and non-equilateral hexagonal protruded ribs; the non-equilateral hexagonal protruded ribs has a shape circumferentially formed by two isometric and parallel positive short sides and two pairs of two parallel slanted long sides wherein the length of each positive short side is ranged from 4 mm to 8 mm, the length of each slanted long side is ranged from 5 mm to 9 mm, the length of the slanted long side is greater than that of the positive short side, and the positive short side and the slanted long side have same width of 1 mm and same height ranged from 025 mm to 035 mm, [0012] Aftcr cxtcnsivc and intension rescarchcs and scvcral tests, thc applicant rcndcrs that the non-slip property of the plastic floor is determined by the combination of the multiple factors such as flexibility of the non-slip layer and the shape design of the non-slip patterns, and a high non-slip coefficient can be obtained when the flexibility of the non-slip layer and the shape design of the non-slip patterns are optimistically combined. The technical projects of the present invention can have a required flexibility by utilizing a special ingredient amount of the non-slip layer and provide an non-slip coefficient of 1.5 (proving 36% increment greater than the non-slip coefficient of 1.1 of the conventional plastic floor tile) by incorporating with non-equilateral hexagonal non-slip patterns with special sizes and shapes, thereby enhancing the non-slip property of the floor tile to overcome the bottlenecks of plastic floor tile. Further, the non-glue non-slip PVC floor tile of the present invention still can have excellent non-slip property on wetted or damped ground surfaces, particularly suitable for the bathroom and balcony. Besides, the non-glue non-slip PVC floor tile of the present invention is conveniently assembled and 1 0 disassembled, capable of providing hard-going effect in wetted or damped area and enhanced non-slip effect to assure the safety of the elder and children.

[0013] A detailed description is given in the following embodiments with reference to the accompanying drawings,

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention can be more frilly understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein: [0014] Fig. 1 is a schematic view showing a three-dimensional structure of a supporting body of an embodiment of the present invention after a combination processing of a first thermal-pressing is fulfilled; [0015] Fig. 2 is a schematic view showing a product of an embodiment of the present invention after a second thermal pressing is fulfilled; [0016] Fig. 3 is an enlarged schematic view showing a bottom surface of an non-slip layer of an embodiment of the present invention; and [0017] Fig, 4 is a partially enlarged schematic view showing thermally-pressed pattern of an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

100181 [First embodimenfl 100191 A method for preparing an non-slip PVC (PVC) floor tile comprises the following steps.

[0020] Firstly, as shown in Fig. 1, in a combination processing of a first thermal-pressing, a PVC non-slip layer 10, a PVC bottom material layer 20 and a PVC middle material layer 30 are bottom-up sequentially stacked to thermally press and laminate into a supporting body 70, A heating temperature of 130 Celsius for 24 minutes is provided in a sectionally-pressurized type thermal pressing process, and pressurized parameters are 1 0 physically shown in Table Al.

Table A]

Unit Stage First sectional Second sectional Third sectional pressurization pressurization pressurization Pressure 50 kgf/cm' 80 kgf/cm2 110 kgf/cm' Parameter Time 24 mm 3 mm 20 mm 10021] A material ingredient of the PVC non-slip layer measured by weight includes degree of polymerization of 1000 of PVC of 58,5%, plasticizer of 38.8%, stabilizer of 2.t%, color powder 0.52% and 800 mesh calcium carbonate of 0.08%, which are amounted to 100%.

10022] Secondly, as shown in Fig. 2, in a second thermal-pressing pattern processing, a PVC wear-resistant layer 50 and a PVC printed layer 40 are bottom-up sequentially stacked on the supporting body 70 for thermal pressing, wherein a heating temperature of 118 degrees of Celsius for 24 minutes is provided in a sectionally-pressurized type thermal pressing process, and pressurized parameters are physically shown in Table BI.

I TableBi

Unit Stage First sectional Second sectional Third sectional pressunzation pressurization pressurization 2 2 2 Pressure 50 kgf/cm 95 kgf/cm 140 kgf/cm Parameter Time 29 mm 3 mm 24 mm [0023] In the thermal pressing process, the PVC wear-resistant layer 50 is combined with the PVC printed layer 40, the PVC printed layer 40 is combined with the PVC middle material layer 30 of the supporting body 70, and the bottom surface of the PVC non-slip layer 10 and a top surface of the PVC wear-resistant layer 50 are simultaneously formed with patterns 60 and 80 by thermal pressing, respectively.

[0024] Referring to Figs. 3 and 4, the thermally-pressed pattern 60 formed on the bottom surface of the PVC non-slip layer 10 includes a plurality of continuously and repetitively connected, flexible, closed and non-equilateral hexagonal protmded ribs 61 1 0 which are circumferentially formed as a closed concave-chambered sucking disk.

[0025] The non-equilateral hexagonal protmded rib has a shape circumferentially formed by two isometric and parallel positive short sides 611 and two pairs of two parallel slanted long sides 612 wherein the length A' of each positive short side 611 is 4 mm, the length of each slanted long side 612 is 5 mm, the positive short side 6]] and the slanted long side 612 have same width D' of 1 mm and same height H' of 0.25 mm.

[0026] The slip resistance of the non-slip PVC floor tile formed by the second thermal-pressing pattern processing is tested on a horizontal platform by a frictional coefficient tester, wherein a tension gauge meter has an indicated value ranged from zero to 1 kg and an accuracy of 0.01 kg. Before using, the value of the tension gauge meter is reset and a to-be-tested object is properly placed. When a weighted counterweight block and a floor tile product adhesively combined to each other are placed on the platform, a power supply is turned on to slide a direction control switch moving from back to front along a guide rail at a constant speed. The experiment of reading a maximum indicated value of the tension gauge meter and sliding the direction control switch for inverse movement is repeated three times for obtaining an average value, and the frictional coefficient can be obtained by dividing the average value with a force for moving the weigh of the counterweight block and the floor tile product. Thus, the tested non-slip coefficient obtained from the frictional coefficient tester is 1.52.

100271 [Second embodiment] [0028] A method for preparing an non-slip PVC floor tile comprises the following steps.

[0029] Firstly, as shown in Fig. 1, in a combination processing of a first thermal-pressing, a PVC non-slip layer tO, a PVC bottom material layer 20 and a PVC middle material layer 30 are bottom-up sequentially stacked to thermally press and laminate into a supporting body 70. A heating temperature of 130 degrees of Celsius for 24 minutes is provided in a sectionally-pressurized type thermal pressing process, and pressurized parameters are physically shown in Table A2.

Table A2

Unit Stage First sectional Second sectional Third sectional pressurization pressurization pressurization Pressure 60 kgf/cm2 60 kgf/cm2 110 kgficm2 Parameter Time 24 mm 1 mm 15 mm [0030] A material ingredient of the PVC non-slip layer measured by weight includes degree of polymerization of 1000 of PVC of 63,5%, plasticizer of 34.9%, stabilizer of 1.0%, color powder 0.54% and 800 mesh calcium carbonate of 0.06%, which are amounted to 100%.

[0031] Secondly, as shown in Fig. 2, in a second thermal-pressing pattern processing, a

B

PVC wear-resistant layer 50 and a PVC printed layer 40 are bottom-up sequentially stacked on the supporting body 70 for thermal pressing, wherein a heating temperature of 118 degrees of Celsius for 24 minutes is provided in a sectionally-pressurized type thermal pressing process, and pressurized parameters are physically shown in Table B2,

Table B2

Unit Stage First sectional Second sectional Third sectional pressurization pressurization pressurization Pressure 50 kgf/cm' 95 kgf/cm2 140 kgf/cm2 Parameter Time 29 mm 3 mm 24 mm 100321 In the thermal pressing process, the PVC wear-resistant layer 50 is combined with the PVC printed layer 40, the PVC printed hiyer 40 is combined with the PVC middle material layer 30 of the supporting body 70, and the bottom surface of the PVC non-slip layer 10 and a top surface of the PVC wear-resistant sayer 50 are simultaneously formed with patterns 60 and 80 by thermal pressing, respectively.

[0033] Referring to Figs. 3 and 4, the thermally-pressed pattern 60 formed on the bottom surface of the PVC non-slip layer 10 includes a plurality of continuously and repetitively connected, flexible, closed and non-equilateral hexagonal protruded ribs 61 which are circumferenti ally formed as a closed concave-chambered sucking disk.

[0034] The non-equilateral hexagonal protruded rib has a shape circumferentiafly formed by two isometric and parallel positive short sides 6t 1 and two pairs of two parallel slanted long sides 612 wherein the length A' of each positive short side 611 is 4mm, the length of each slanted long side 612 is 5 mm, the positive short side 611 and the slanted long side 62 have same width D' of mm and same height H' of 0.35 mm.

[0035] The slip resistance of the non-slip PVC floor tile formed by the second thermal-pressing pattern processing is tested by the frictional coefficient tester and the testing method, and the tested non-slip coefficient obtained therefrom is 1.55.

100361 [Third embodimenfl [0037] A method for preparing an non-slip PVC floor tile comprises the following steps.

[0038] Firstly, as shown in Fig. 1, in a combination processing of a first thermal-pressing, a PVC non-slip layer 10, a PVC bottom material layer 20 and a PVC middle material layer 30 are bottom-up sequentially stacked to thermafly press and laminate into a supporting body 70. A heating temperature of 130 degrees of Celsius for 24 minutes is provided in a sectionally-pressurized type thermal pressing process, and pressurized parameters are physicafly shown in Table A3.

Table A3

Unit Stage First sectional Second sectional Third sectional pressurization pressurization pressurization Pressure 55 kgf/cm2 70 kgf/cm2 120 kgf/cm2 Parameter Time 25 mm 2 mm 16 mm [0039] A material ingredient of the PVC non-slip layer measured by weight includes degree of polymerization of 1000 of PVC of 61,5%, plasticizer of 36.5%, stabilizer of 1.3%, color powder 0.64% and 800 mesh calcium carbonate of 0.06%, which are amounted to 100%.

[0040] Secondly, as shown in Fig. 2, in a second thermal-pressing pattern processing, a PVC wear-resistant layer 50 and a PVC printed layer 40 are bottom-up sequentially stacked on the supporting body 70 for thermal pressing, wherein a heating temperature of 118 degrees of Celsius for 24 minutes is provided in a sectionally-pressurized type thermal pressing process, and pressurized parameters are physically shown in Table B3.

I Table B3

Unit Stage First sectional Second sectional Third sectional pressunzation pressurization pressurization -2 2 2 Pressure 60 kgf/cm 95 kgf/cm 140 kgf/cm Parameter Time 29 mm 1 mm 24 mm [0041] In the thermal pressing process, the PVC wear-resistant layer 50 is combined with the PVC printed layer 40, the PVC printed layer 40 is combined with the PVC middle material layer 30 of the supporting body 70, and the bottom surface of the PVC non-slip layer 10 and a top surface of the PVC wear-resistant layer 50 are simultaneously formed with patterns 60 and 80 by thermal pressing, respectively, [0042] Referring to Figs. 3 and 4, the thermally-pressed pattern 60 formed on the bottom surface of the PVC non-slip layer 10 includes a plurality of continuously and repetitively connected, flexible, closed and non-equilateral hexagonal protmded ribs 61 1 0 which are circumferentially formed as a closed concave-chambered sucking disk.

[0043] The non-equilateral hexagonal protmded rib has a shape circumferentially formed by two isometric and parallel positive short sides 611 and two pairs of two parallel slanted long sides 612 wherein the length A' of each positive short side 611 is 4mm, the length of each slanted long side 612 is 5 mm, the positive short side 6 and the slanted long side 612 have same width D' of 1 mm and same height H' of 0.30 mm.

[0044] The slip resistance of the non-slip PVC floor tile formed by the second thermal-pressing pattern processing is tested by the frictional coefficient tester and the testing method, and the tested non-slip coefficient obtained therefrom is 1,50, [0045] [Fourth embodiment] 2 0 [0046] A method for preparing an non-slip PVC floor tile comprises the following steps.

[0047] Firstly, as shown in Fig. 1, in a combination processing of a first thennal-ii pressing, a PVC non-slip layer 10, a PVC bottom material layer 20 and a PVC middle material layer 30 are bottom-up sequentially stacked to thermafly press and aminate into a supporting body 70. A heating temperature of 130 degrees of Celsius for 24 minutes is provided in a sectionally-pressurized type thermal pressing process, and pressurized parameters are physicafly shown in Table A4.

Table A4

Unit Stage First sectional Second sectional Third sectional pressurization pressurization pressurization 2 2 2 Pressure 52 kgf/cm 62 kgf/cm 110 kgf/cm Parameter Time 25 mm 2 mm 20 mm [0048] A material ingredient of the PVC non-slip layer measured by weight includes degree of polymerization of 1000 of PVC of 62,3%, plasticizer of 35.2%, stabilizer of 1.8%, color powder 0.62% and 800 mesh calcium carbonate of 0.08%, which are amounted to 100%.

100491 Secondly, as shown in Fig. 2, in a second thermal-pressing pattern processing, a PVC wear-resistant layer 50 and a PVC printed layer 40 are bottom-up sequentially stacked on the supporting body 70 for thermal pressing, wherein a heating temperature of 118 degrees of Celsius for 24 minutes is provided in a sectionally-pressurized type thermal pressing process, and pressurized parameters are physically shown in Table B4.

Table B4

Unit Stage First sectional Second sectional Third sectional pressuzation pressurization pressurization Pressure 50 kgf/cm2 94 kgf/cm2 140 kgf/cm2 Parameter Time 28 mm 3 mm 23 mm [0050] In the thermal pressing process, the PVC wear-resistant layer 50 is combined with the PVC printed layer 40, the PVC printed layer 40 is combined with the PVC middle material layer 30 of the supporting body 70, and the bottom surface of the PVC non-slip layer 10 and a top surface of the PVC wear-resistant layer 50 are simultaneously formed with patterns 60 and 80 by thermal pressing, respectively.

100511 Referring to Figs. 3 and 4, the thermally-pressed pattern 60 formed on the bottom surface of the PVC non-slip layer 10 includes a plurality of continuously and repetitively connected, flexible, closed and non-equilateral hexagonal protmded ribs 61 which are circumferentially formed as a closed concave-chambered sucking disk.

100521 The non-equilateral hexagonal protruded rib has a shape circumferentially formed by two isometric and parallel positive short sides 611 and two pairs of two parallel slanted long sides 612 wherein the length A' of each positive short side 6t1 is 4 mm, the length of each slanted long side 612 is 5 mm, the positive short side 611 and the slanted long side &12 have same width D' of mm and same height El' of 0.25 mm.

[0053] The slip resistance of the non-slip PVC floor tile formed by the second thermal-pressing pattern processing is tested by the frictional coefficient tester and the testing method, and the tested non-slip coefficient obtained therefrom is 1.53.

[0054] [Fifth embodiment] [0055] A method for preparing an non-slip PVC floor tile comprises the following steps.

[0056] Firstly, as shown in Fig. , in a combination processing of a first thermal-pressing, a PVC non-slip layer 10, a PVC bottom material laycr 20 and a PVC middle material layer 30 are bottom-up sequentially stacked to thermally press and laminate into a supporting body 70. A heating temperature of HO degrees of Celsius for 24 minutes is provided in a sectionally-pressurized type thermal pressing process, and pressurized parameters are physically shown in Table AS.

Table AS

Unit Stage First sectional Second sectional Third sectional pressurization pressurization pressurization Pressure 60 kgf/cm2 80 kgf/cm2 110 kgf/cm2 Parameter Time 27 mm 3 mm 15 mm [0057] A material ingredient of the PVC non-slip layer measured by weight includes degree of polymerization of 1000 of PVC of 59%, plasticizer of 39%, stabilizer of 1.25%, color powder 0.69% and 800 mesh calcium carbonate of 0.06%, which are amounted to 100%.

10058] Secondly, as shown in Fig, 2, in a second thermal-pressing pattern processing, a PVC wear-resistant layer 50 and a PVC printed layer 40 are bottom-up sequentially stacked on the supporting body 70 for thermal pressing, wherein a heating temperature of 118 degrees of Celsius for 24 minutes is provided in a sectionally-pressurized type thermal pressing process, and pressurized parameters are physically shown in Table B5.

Table B5

Unit Stage First sectional Second sectional Third sectional pressurization pressurization pressurization Pressure 50 kgf/cm2 80 kgf/cm2 120 kgf/cm2 Parameter Time 29 mm 1 mm 22 mm [0059] In the thermal pressing process, the PVC wear-resistant layer 50 is combined with the PVC printed layer 40, the PVC printed layer 40 is combined with the PVC middle material layer 30 of the supporting body 70, and the bottom surface of the PVC non-slip layer 10 and a top surface of the PVC wear-resistant layer 50 are simultaneously formed with patterns 60 and 80 by thermal pressing, respectively.

[0060] Referring to Figs. 3 and 4, the thermally-pressed pattern 60 formed on the bottom surface of the PVC non-slip layer 10 includes a plurality of continuously and repetitively connected, flexible, closed and non-equilateral hexagonal protmded ribs 61 which are circumferentially formed as a closed concave-chambered sucking disk, 100611 The non-equilateral hexagonal protruded rib has a shape circumferentially formed by two isometric and parallel positive short sides 611 and two pairs of two parallel slanted long sides 62 wherein the length A' of each positive short side 611 is 4 mm, the length of each slanted long side 612 is 5 mm, the positive short side 611 and the slanted long side 612 have same width D' of 1 mm and same height H' of 0,25 mm.

100621 The slip resistance of the non-slip PVC floor tile fonned by the second thermal-pressing pattern processing is tested by the frictional coefficient tester and the testing method, and the tested non-slip coefficient obtained therefrom is 1,51,