CN101215179A - Lightweight fireproof filling material for metal door produced by expansion perlite and preparation method thereof - Google Patents

Lightweight fireproof filling material for metal door produced by expansion perlite and preparation method thereof Download PDF

Info

Publication number
CN101215179A
CN101215179A CNA2007103069935A CN200710306993A CN101215179A CN 101215179 A CN101215179 A CN 101215179A CN A2007103069935 A CNA2007103069935 A CN A2007103069935A CN 200710306993 A CN200710306993 A CN 200710306993A CN 101215179 A CN101215179 A CN 101215179A
Authority
CN
China
Prior art keywords
filling material
metal door
perlite
expansion perlite
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CNA2007103069935A
Other languages
Chinese (zh)
Other versions
CN101215179B (en
Inventor
应连希
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yongkang Meixin Industry Coltd
Original Assignee
Yongkang Meixin Industry Coltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yongkang Meixin Industry Coltd filed Critical Yongkang Meixin Industry Coltd
Priority to CN2007103069935A priority Critical patent/CN101215179B/en
Publication of CN101215179A publication Critical patent/CN101215179A/en
Application granted granted Critical
Publication of CN101215179B publication Critical patent/CN101215179B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/10Lime cements or magnesium oxide cements
    • C04B28/105Magnesium oxide or magnesium carbonate cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/28Fire resistance, i.e. materials resistant to accidental fires or high temperatures

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Special Wing (AREA)
  • Building Environments (AREA)

Abstract

The invention discloses a lightening fireproof filling material for producing metal door by expanded perlite and a process for preparation. The material comprises expanded perlite, magnesium oxide, magnesium sulfate, calcium hydroxide, aqueous adhesive and water proofing agent, the volume weight is between 200-300kg/m3, the proportionings of each component according to weight percentage respectively are that the expanded perlite takes 45-65, the magnesium oxide takes 15-25, the magnesium sulfate takes 5-15, the calcium hydroxide takes 0.5-4 and the aqueous adhesive takes 2-5. Employing the technical scheme, the product has the advantages of high mechanical strength, light weight, high grade of fire resistance, good effect of sound absorption and acoustic insulation, strong anti-weatherability, heat insulation, heat preservation and energy conservation, easy production and no poison, on hazard and no radiation and the like. The product can be widely used in metal door industry, architectural materials industry and the related industries.

Description

Utilize expansion perlite to produce lightweight fireproof filling material for metal door and preparation method
Technical field
The present invention relates to a kind of light material, the lightweight fireproof filling material and the preparation method of industry such as particularly a kind of door inner filling material that can be used for metal door such as antitheft door, fire door, steel entering house door, material of construction.
Background technology
At present, generally to select honeycomb paper and Calucium Silicate powder plate holder aluminium silicate wool for use be stopping composition to metal door such as the antitheft door of production, fire door, steel entering house door.The weak point that honeycomb paper exists is: meeting fire can burn, and does not have fire resistance, and sound absorption sound insulation and heat preservation and insulation are poor, and moisture-sensitive is met water and can be softened, and the waterproof water resistance is poor.The weak point that Calucium Silicate powder plate holder aluminium silicate wool exists is: fire resistance rating is low, meet high temperature and can produce fusing, do not have anti-fire action, the production cost height, asbestos needle-holding hand, dust suck the human body infringement big, and State Environmental Protection Administration just clearly stipulated in 2005 for this reason, must not contain asbestos in the household article, tackiness agent must not contain objectionable impuritiess such as formaldehyde, benzene.Metal door such as antitheft door, fire door, steel entering house door press for a kind of fire-protection rating height, physical strength is good, production is easy for installation, cost is low type gate inner filling material.
And the material of construction of use is generally based on clay brick, cement products at present, and its shortcoming is that Heavy Weight, intensity are low, the sound-insulating and heat-insulating flameproof effect is poor; Though relevant scientific research institution, manufacturer and knowledgeable people have carried out R and D at the problems referred to above that exist, as a kind of light sound-proof heat-insulating, fire-preventing material of construction and the manufacture method of State Intellectual Property Office at Granted publication on August 24th, 2005, its patent No. is 021084467, with ore deposit sillar or earth spherolite through high-temperature catalytic, to produce the inorganic light weight particulate matter, adopt inorganic light weight particulate matter and unsaturated polyester to mix mutually, carry out molded and shaped again, make fixed this inorganic light weight particulate matter of unsaturated polyester gummed, make various plates, the light sound-proof heat-insulating, fire-preventing material of construction of bar and post class; Its shortcoming is complex manufacturing, cost height, therefore is difficult to apply on market.
For this reason, many scientific research institutions, manufacturer and knowledgeable people have carried out R and D at the problems referred to above, do not improve way preferably but have as yet so far.
Summary of the invention
My company is the problem that solves above-mentioned existence, drop into a large amount of manpower and financial resources and carried out development research, through effort more than a year, my company develops the lightweight fireproof filling material and the preparation method of industries such as a kind of door inner filling material that can be used for metal door such as antitheft door, fire door, steel entering house door and material of construction.The objective of the invention is to produce a kind of unit weight at 200~300kg/m 3Between lightweight fireproof filling material, these goods have physical strength height, in light weight, advantage such as fire resistance rating is high, good, the weathering resistance of sound absorption soundproof effect is strong, heat insulation heat preservation energy-saving, production are easy.These goods can be widely used in metal door industry, building material industry and relevant industries.
The technical solution adopted for the present invention to solve the technical problems, it comprises expansion perlite, magnesium oxide, sal epsom, white lime, water soluble adhesive, water-resisting agent, and unit weight is at 200~300kg/m 3Between, each composition mixture ratio by weight percent is respectively:
Expansion perlite 45~65;
Magnesium oxide 15~25;
Sal epsom 5~15;
White lime 0.5~4;
Water soluble adhesive 2~5;
Water-resisting agent 1~6.
Described perlite is a ball-type closed pore shape, particle diameter≤1~3mm, and unit weight is at 130~150kg/m 3, the effect that mainly play weight reduction, sound-insulating and heat-insulating insulation, fireproof, reduces cost.
Described magnesian content 〉=85%, its active oxidation Mg content 〉=65%, have not been cooked or heated long enough burn till part≤2%, overdo burn till part≤3%, free calcium oxide content≤2%, ferric oxide≤1.5%, loss on ignition≤15% mainly plays gelling, the effect of gaining in strength.
Described sal epsom mainly plays solidification, the hole that reduces the goods hardenite is arranged, to returning halogen and returning the modifying function of frost, increases waterproof and water resistance, avoids the corrosion of iron sheet, plays the rust protection effect.
Described water soluble adhesive is a butadiene-styrene latex, and the solids content of its aqueous solution is 45~52%, mainly plays bonding effect.
Described water-resisting agent is a waterproofing agent of organosilicon, mainly has been gap and transparent performance that pore is stopped up in sealing, improves structure, improves water resisting property, reduces water-intake rate.
The preparation method of described lightweight fireproof filling material, it comprises the steps:
(1), will mix in expansion perlite, magnesium oxide, sal epsom, white lime, the water-resisting agent adding stirrer with order by weight proportion;
(2), simultaneously be emulsion with the water soluble adhesive thin up, and add in proportion in the stirrer that it is even to carry out secondary stirring again, water content requires material to be pinched with hand agglomerating, loses the degree that can scatter again on the ground and is advisable;
(3), compound is added use press compression moulding in the mould;
(4), after the demoulding, one week of natural curing become finished product in summer under the normal temperature and pressure, the maintenance of need heating winter.
After adopting above-mentioned technical scheme, the present invention has following advantage:
1, the present invention's mechanical-physical drawing method, in expansion perlite, add thick shape gelling slip, in mixing the process that stirs, the expansion perlite surface is formed one deck waterproofing membrane seals pore, both expansion perlite was played the waterproof resistance effect, bonding effect is arranged again, make the expansion perlite particle mutually bonding and form a monoblock through compacting, thereby make lightweight fireproof filling material of the present invention have the performance of adiabatic heat-insulation, sound absorption sound insulation, obvious energy conservation, it is easy and simple to handle, less investment, cost are low;
2, the present invention can prevent damp suction surface halide accumulation, craze and transfiguration;
3, the structure that bonded together by the expansion perlite particle of goods of the present invention changes the size of unit weight and intensity by the consumption of adjusting particle diameter size and gelating material, and setting range is big, and unit weight can be at 200~300kg/m 3Between select for use arbitrarily according to purposes so that satisfy the requirement of different functions of use;
4, the present invention uses styrene-butadiene latex as water soluble adhesive, thereby water-absorbent, cost value of having improved the perlite surface etc. all are better than existing other caking agent, its major cause is that it is a water soluble adhesive, to producing low-density goods beyond thought adhesive effect is arranged, it is big that power is stained with on the surface, bonding stability is strong, helps controlling stopping composition unit weight size, thereby can make goods unit weight at 200~300kg/m 3Between adjust arbitrarily, can widen Application Areas of the present invention greatly like this; Also improve freeze thawing intensity simultaneously, done wet tenacity, softening intensity and corrosion resistant ability, waterproof water resistance and energy-saving effect.
5, goods of the present invention can be used as metal anti-theft safety door, metal entering house door, fire metal door inner filling material, it is the substitute that replaces honeycomb paper, calcium silicate board and aluminium silicate wool, its cost is than calcium silicate board and aluminium silicate wool low about 60%, reduce the usage quantity of honeycomb paper, very big potentiality are also arranged saving forest resourceies; Can change traditional stopping composition honeycomb paper, calcium silicate board and aluminium silicate wool and fill that difficulty is big, the backwardness of complex manufacturing, raise labour productivity, shorten the production cycle, be once great technological change to the production of metal door; The present invention is used for building material industry, and consumption is very huge.
Embodiment
Further specify the present invention below in conjunction with specific embodiments, it comprises expansion perlite, magnesium oxide, sal epsom, white lime, water soluble adhesive, water-resisting agent, and unit weight is at 200~300kg/m 3Between, each composition mixture ratio by weight percent is respectively:
Expansion perlite 45~65;
Magnesium oxide 15~25;
Sal epsom 5~15;
White lime 0.5~4;
Water soluble adhesive 2~5;
Water-resisting agent 1~6.
Described perlite is a ball-type closed pore shape, particle diameter≤1~3mm, and unit weight is at 130~150kg/m 3
Described magnesian content 〉=85%, its active oxidation Mg content 〉=65% has not been cooked or heated long enough and burns till part≤2%, overdoes and burns till part≤3%, free calcium oxide content≤2%, ferric oxide≤1.5%, loss on ignition≤15%.
Described water soluble adhesive is a butadiene-styrene latex, and the solids content of its aqueous solution is 45~52%.
Described water-resisting agent is a waterproofing agent of organosilicon.
The preparation method of described lightweight fireproof filling material, it comprises the steps:
(1), will mix in expansion perlite, magnesium oxide, sal epsom, white lime, the water-resisting agent adding stirrer with order by weight proportion;
(2), simultaneously be emulsion with the water soluble adhesive thin up, and add in proportion in the stirrer that it is even to carry out secondary stirring again, water content requires material to be pinched with hand agglomerating, loses the degree that can scatter again on the ground and is advisable;
(3), compound is added use press compression moulding in the mould;
(4), after the demoulding, one week of natural curing become finished product in summer under the normal temperature and pressure, the maintenance of need heating winter.
Embodiment 1: present embodiment is 200kg/m by unit weight 3Prepare, wherein perlite 110kg, magnesium oxide 40kg, sal epsom 20kg, waterproofing agent of organosilicon 6kg, white lime 2kg, styrene-butadiene latex 7kg.Process by above-mentioned described preparation method, perlitic diameter≤1~3mm, the ratio of its compression is 1.4: 1, is pressed into the sheet material of 2050mm * 960mm * 50mm.This material combustion performance reaches the A1 level after testing, and the Fire Resistance Steel Door fire performance of filling with this material is 72 minutes, reaches 1 grade of fire resistance period requirement of first.Ultimate compression strength 23Mpa, folding strength 13Mpa.
Embodiment 2: present embodiment is 250kg/m by unit weight 3Prepare, wherein perlite 138, magnesium oxide 50, sal epsom 25, waterproofing agent of organosilicon 7.5, white lime 2.5, styrene-butadiene latex 7.Process by above-mentioned described preparation method, perlitic diameter≤1~3mm, the ratio of its compression is 1.6: 1, is pressed into the sheet material of 2050mm * 960mm * 50mm.This material combustion performance reaches the A1 level after testing, and the Fire Resistance Steel Door fire performance of filling with this material is 72 minutes, reaches 1 grade of fire resistance period requirement of first.Ultimate compression strength 24.3Mpa, folding strength 13.9Mpa.
Embodiment 3: present embodiment is 300kg/m by unit weight 3Prepare, wherein perlite 165, magnesium oxide 60, sal epsom 30, waterproofing agent of organosilicon 9, white lime 3, styrene-butadiene latex 10.5.Process by above-mentioned described preparation method, perlitic diameter≤1~2.5mm, the ratio of compression is 1.8: 1 times, makes the sheet material of 2050mm * 960mm * 50mm.This material combustion performance reaches the A1 level after testing, and the Fire Resistance Steel Door fire performance of filling with this material is 72 minutes, reaches 1 grade of fire resistance period requirement of first.Ultimate compression strength 25.74Mpa, folding strength 14.8Mpa.
From the foregoing description can draw unit weight light-intensity difference, unit weight weight-intensity is good; Above-mentioned board product detects this material combustion performance through national fire-proof construction material quality supervision and test center and reaches the A1 grade standard, and the Fire Resistance Steel Door fire performance of filling with this material is 72 minutes, reaches 1 grade of fire resistance period requirement of first.

Claims (6)

1. one kind is utilized expansion perlite to produce lightweight fireproof filling material for metal door, and it is characterized in that: it comprises expansion perlite, magnesium oxide, sal epsom, white lime, water soluble adhesive, water-resisting agent, and unit weight is at 200~300kg/m 3Between, each composition mixture ratio by weight percent is respectively:
Expansion perlite 45~65;
Magnesium oxide 15~25;
Sal epsom 5~15;
White lime 0.5~4;
Water soluble adhesive 2~5;
Water-resisting agent 1~6.
2. the expansion perlite that utilizes according to claim 1 is produced lightweight fireproof filling material for metal door, and it is characterized in that: described perlite is a ball-type closed pore shape, particle diameter≤1~3mm, and unit weight is at 130~150kg/m 3
3. the expansion perlite that utilizes according to claim 1 is produced lightweight fireproof filling material for metal door, it is characterized in that: described magnesian content 〉=85%, its active oxidation Mg content 〉=65%, have not been cooked or heated long enough and burn till part≤2%, overdo and burn till part≤3%, free calcium oxide content≤2%, ferric oxide≤1.5%, loss on ignition≤15%.
4. the expansion perlite that utilizes according to claim 1 is produced lightweight fireproof filling material for metal door, and it is characterized in that: described water soluble adhesive is a butadiene-styrene latex, and the solids content of its aqueous solution is 45~52%.
5. the expansion perlite that utilizes according to claim 1 is produced lightweight fireproof filling material for metal door, and it is characterized in that: described water-resisting agent is a waterproofing agent of organosilicon.
6. according to the preparation method of each described lightweight fireproof filling material of claim 1 to 5, it is characterized in that: it comprises the steps:
(1), will mix in expansion perlite, magnesium oxide, sal epsom, white lime, the water-resisting agent adding stirrer with order by weight proportion;
(2), simultaneously be emulsion with the water soluble adhesive thin up, and add in proportion in the stirrer that it is even to carry out secondary stirring again, water content requires material to be pinched with hand agglomerating, loses the degree that can scatter again on the ground and is advisable;
(3), compound is added use press compression moulding in the mould;
(4), after the demoulding, one week of natural curing become finished product in summer under the normal temperature and pressure, the maintenance of need heating winter.
CN2007103069935A 2007-12-29 2007-12-29 Lightweight fireproof filling material for metal door produced by expansion perlite and preparation method thereof Expired - Fee Related CN101215179B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2007103069935A CN101215179B (en) 2007-12-29 2007-12-29 Lightweight fireproof filling material for metal door produced by expansion perlite and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2007103069935A CN101215179B (en) 2007-12-29 2007-12-29 Lightweight fireproof filling material for metal door produced by expansion perlite and preparation method thereof

Publications (2)

Publication Number Publication Date
CN101215179A true CN101215179A (en) 2008-07-09
CN101215179B CN101215179B (en) 2011-05-18

Family

ID=39621699

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2007103069935A Expired - Fee Related CN101215179B (en) 2007-12-29 2007-12-29 Lightweight fireproof filling material for metal door produced by expansion perlite and preparation method thereof

Country Status (1)

Country Link
CN (1) CN101215179B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101863651A (en) * 2010-05-11 2010-10-20 中国扬子集团滁州扬子门业有限公司 Stuffing of fire door
CN101659561B (en) * 2009-08-07 2012-03-21 通达耐火技术股份有限公司 800kg-class energy-saving heat insulation lining material and preparation method thereof
CN101659558B (en) * 2009-08-07 2012-03-21 通达耐火技术股份有限公司 500kg-class energy-saving heat insulation lining material and preparation method thereof
CN101659559B (en) * 2009-08-07 2012-04-11 通达耐火技术股份有限公司 600kg-class energy-saving heat insulation lining material and preparation method thereof
CN101659560B (en) * 2009-08-07 2012-04-18 通达耐火技术股份有限公司 700kg-class energy-saving heat insulation lining material and preparation method thereof
CN102863190A (en) * 2011-07-07 2013-01-09 刘学厚 Inorganic composite waterproof, fireproof and heat preservation material for buildings
CN103011861A (en) * 2012-12-18 2013-04-03 山西高科耐火材料股份有限公司 Glass kiln-used dry type micro-expansion heat preservation coating
CN108751880A (en) * 2018-06-14 2018-11-06 青岛正望钢水控制股份有限公司 A kind of fire window inflatable heat-barrier material and preparation method thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101659561B (en) * 2009-08-07 2012-03-21 通达耐火技术股份有限公司 800kg-class energy-saving heat insulation lining material and preparation method thereof
CN101659558B (en) * 2009-08-07 2012-03-21 通达耐火技术股份有限公司 500kg-class energy-saving heat insulation lining material and preparation method thereof
CN101659559B (en) * 2009-08-07 2012-04-11 通达耐火技术股份有限公司 600kg-class energy-saving heat insulation lining material and preparation method thereof
CN101659560B (en) * 2009-08-07 2012-04-18 通达耐火技术股份有限公司 700kg-class energy-saving heat insulation lining material and preparation method thereof
CN101863651A (en) * 2010-05-11 2010-10-20 中国扬子集团滁州扬子门业有限公司 Stuffing of fire door
CN101863651B (en) * 2010-05-11 2012-08-01 中国扬子集团滁州扬子门业有限公司 Stuffing of fire door
CN102863190A (en) * 2011-07-07 2013-01-09 刘学厚 Inorganic composite waterproof, fireproof and heat preservation material for buildings
CN103011861A (en) * 2012-12-18 2013-04-03 山西高科耐火材料股份有限公司 Glass kiln-used dry type micro-expansion heat preservation coating
CN103011861B (en) * 2012-12-18 2014-07-16 山西高科耐火材料股份有限公司 Glass kiln-used dry type micro-expansion heat preservation coating
CN108751880A (en) * 2018-06-14 2018-11-06 青岛正望钢水控制股份有限公司 A kind of fire window inflatable heat-barrier material and preparation method thereof

Also Published As

Publication number Publication date
CN101215179B (en) 2011-05-18

Similar Documents

Publication Publication Date Title
CN101215179B (en) Lightweight fireproof filling material for metal door produced by expansion perlite and preparation method thereof
CN101143777B (en) Lightweight fireproof foaming cement door inner filling material and preparation method thereof
CN101628802B (en) Composite inorganic heat insulation and waterproof mortar and application thereof
CN102826824B (en) Sound-proof, heat-insulated and flame-retardant lightweight aggregate magnesite coagulating composite material and composite plate thereof
CN104876471A (en) Inorganic composite insulation board
CN102942349B (en) Manufacturing method of inorganic dolomite magnesia fireproof gel material
CN101514089B (en) Self-insulation external wallboard for buildings
CN102296709B (en) Inorganic foam heat insulation profile
US8088217B2 (en) Cement-based fire door core
CN103510671B (en) Fire-proof magnesium composite board
CN102924009A (en) Inorganic composite thermal mortar
CN103193420A (en) Nano-material-containing high-strength high-heat insulation exterior wall inorganic heat-retaining face brick
CN103265262A (en) Inorganic composite insulation board and preparation method thereof
CN102633525A (en) Foam concrete with desulfurized gypsum as main cementing material and preparation method of foam concrete
CN102924001A (en) Novel expanded perlite insulation board and preparation method thereof
CN103243879A (en) High-strength high-heat-insulation inorganic heat-preservation decorative external wall face brick containing nano materials
CN102173677A (en) Inflaming retarding building heat insulation material and production method thereof
CN103880376B (en) A kind of lightweight inorganic fireproof heat preservation plate material
CN103011712B (en) Vitrified micro bubble thermal mortar aggregate and preparation method thereof
CN105863083A (en) Inorganic thermal insulating wall
CN113754367A (en) High-temperature-resistant high-strength fireproof door core plate and preparation method thereof
CN104402509A (en) Perlite fireproof door core board and preparation method thereof
CN103880375B (en) A kind of preparation method of lightweight inorganic fireproof heat preservation plate material
CN111848098A (en) Calcium magnesium silicate heat-insulating material and preparation method and application thereof
CN103496893A (en) Novel energy-saving, heat-preservation and environment-friendly building sand material and preparation method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110518

Termination date: 20141229

EXPY Termination of patent right or utility model