CN104031581B - A kind of environment-friendly type high performance water adhesive and preparation method thereof for wood pencil - Google Patents

A kind of environment-friendly type high performance water adhesive and preparation method thereof for wood pencil Download PDF

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Publication number
CN104031581B
CN104031581B CN201410231820.1A CN201410231820A CN104031581B CN 104031581 B CN104031581 B CN 104031581B CN 201410231820 A CN201410231820 A CN 201410231820A CN 104031581 B CN104031581 B CN 104031581B
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China
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emulsion
vinyl acetate
stirring
pencil
environment
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CN201410231820.1A
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Chinese (zh)
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CN104031581A (en
Inventor
王永忠
蔡梦军
王立忠
马群
范丽明
吴秋芳
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中国第一铅笔有限公司
上海华明高技术(集团)有限公司
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Abstract

A kind of wood pencil environment-friendly type high performance water adhesive, is made up of ethene-vinyl acetate copolymer emulsion 70~90w%, ethylene-vinyl acetate carboxylation modified emulsion 5~10w% and acrylate pressure-sensitive adhesive emulsion 5~20w% formula. Its preparation process is: in reactor, add dispersed with stirring after ethene-vinyl acetate copolymer emulsion and ethylene-vinyl acetate carboxylation modified emulsion, then use the NaHCO of 8~10w%3It is 6.5~7.5 rear continuation dispersed with stirring that solution regulates the pH value of blending emulsion; Then add acrylate pressure-sensitive adhesive emulsion, regulating its viscosity with the polyglycol solution of 3~5w% is 1500~2000mPa.s (23 DEG C), and dispersed with stirring is evenly rear with packing after 200~400 mesh sieves filtrations. The present invention has that good fluidity, film forming speed are fast, water resistance and ageing-resistant performance is good, adhesion strength high, is applied to the bonding between timber and pencil-lead, timber and the timber of wood pencil, also can be used for the bonding between PVC plastic sheeting.

Description

A kind of environment-friendly type high performance water adhesive and preparation method thereof for wood pencil

Technical field

The present invention relates to a kind of aqueous adhesive and preparation method thereof, be particularly for a kind of wood pencil environment-friendly type highPerformance aqueous adhesive and preparation method thereof.

Background technology

In traditional pencil manufacture process, generally by applying external force, pencil-lead is squeezed in pencil groove in case pencilCore skids off from pencil timber, but this sampling technology often causes the pen core in pencil groove to be occurred out by the penholder of pinch off or pencilSplit, thereby cause a series of quality problems. In order to address this problem, conventional method is to utilize aqueous adhesive to incite somebody to action at presentPencil-lead is together with bonding wood materials, and concrete operation method is: water-based pencil-lead adhesive is coated on pencil slat material and plateIn groove on material, then pencil-lead is put into groove, more upper and lower two boards material is merged, by clamp, treat adhesiveAfter drying and forming-film, enter again the operations such as plane bar below, moulding, japanning.

Existing its main component of pencil-lead aqueous adhesive of current domestic use is polyvinyl acetate emulsion (PVAc breastLiquid), although polyvinyl acetate emulsion has good bond effect to timber, its resistance to water and moisture-proof are poor, easily moisture absorption becomesFilm temperature is high, and under high temperature, adhesion strength decline produces creep, strong to the bonding of the especially high category-B black of all kinds of pen cores pen coreDegree is not enough. In addition, due to loss of properties on aging after PVAc emulsion drying and forming-film, even if the pencil of making is placed one section at normal temperaturesAfter time, also easily there is the phenomenons such as slide core, cause the entirety of pencil end product quality to decline.

Summary of the invention

The object of the present invention is to provide a kind of wood pencil environment-friendly type high performance water adhesive, make it have water-fastProperty and good weatherability, creep resistance are strong, at adhesion strength high between timber and timber, between timber and pencil-lead.

The present invention is realized by following design:

A kind of wood pencil environment-friendly type high performance water adhesive, forms by following formula:

Constituent percentage by weight (w%)

Ethene-vinyl acetate copolymer emulsion 70~90

Ethylene-vinyl acetate carboxylation modified emulsion 5~10

Acrylate pressure-sensitive adhesive emulsion 5~20

Described ethene-vinyl acetate copolymer emulsion is that Beijing DongFang petroleum chemical engineering Co., Ltd. Organic Chemical Plant producesOne in EP706 type or EP707K type product that VAE-707 type, watt gram series of polymers (Nanjing) Co., Ltd produce, orMore than one mixture.

Described ethylene-vinyl acetate carboxylation modified emulsion is that watt gram series of polymers (Nanjing) Co., Ltd produces920 type products.

Described acrylate pressure-sensitive adhesive emulsion is the GH2155 type product that Shanghai Huayi Acrylic Acid Co., Ltd. produces.

The preparation method of environment-friendly type high performance water adhesive for described wood pencil, comprises the following steps:

(1) in reactor, add the ethene-vinyl acetate copolymer emulsion good by formula metering, start agitating device slightlyAfter being permitted to stir, add ethylene-vinyl acetate carboxylation modified emulsion, then with the speed dispersed with stirring 0.5 of 60~80 revs/min~1 hour, then use the NaHCO of 8~10w%3After solution regulates the pH value of above-mentioned blending emulsion to be 6.5~7.5, continue dispersed with stirring0.5~1 hour;

(2) then the acrylate pressure-sensitive adhesive emulsion measuring is added in aforesaid reaction vessel to 15~30 points of dispersed with stirringZhong Hou, regulating its viscosity with the polyglycol solution of 3~5w% is 1500~2000mPa.s (23 DEG C, rotation viscometer), then withThe speed dispersed with stirring of 100~120 revs/min 0.5~2 hour;

(3) finally filter rear packaging with 200~400 mesh sieves, can obtain wood pencil environment-friendly type high performance water glueStick.

Wood pencil provided by the present invention has good fluidity, film forming speed with environment-friendly type high performance water adhesiveHurry up, water resistance and ageing-resistant performance is good, adhesion strength high.

Wood pencil provided by the invention environment-friendly type high performance water adhesive, via TUV south, group of Germany sets upFormer Jiangsu Shanghai branch company of increase one's luck product traffic Co., Ltd (be now renamed as: in southern moral authentication checks (China) Co., LtdSea branch company) detect the content of the content of the free formaldehyde in adhesive, the content of benzene, toluene+dimethylbenzene, and always volatilizationThe content of organic matter does not all detect, and meets wanting of national standard " safety general of GB21027-2007 students' supplies requiring "Ask, prove that it is that Environmental Safety is desirable.

Wood pencil provided by the present invention with environment-friendly type high performance water adhesive can be widely used in wood pencil itBetween timber and the bonding between pencil-lead, also can be used for the bonding between timber and timber, also can be used for PVC plastic sheeting itBetween bonding.

Detailed description of the invention

Embodiment 1

At 1.5m3In reactor, add ethene-vinyl acetate copolymer emulsion 700kg, after starting agitating device and stirring slightly,Add 100kg ethylene-vinyl acetate carboxylation modified emulsion, then with the speed dispersed with stirring of 60 revs/min 1 hour, then use 8w%NaHCO3It is 6.5 that solution regulates the pH value of above-mentioned blending emulsion, continues dispersed with stirring 1 hour.

Then 200kg acrylate pressure-sensitive adhesive emulsion is added wherein, dispersed with stirring is after 15 minutes, by the poly-second two of 5w%It is 2000mPas (23 DEG C, rotation viscometer) that alcoholic solution regulates its viscosity, less with the speed dispersed with stirring 2 of 100 revs/minTime.

Finally, after filtering with 400 mesh sieves, pack, can obtain wood pencil environment-friendly type high performance water adhesive.

Embodiment 2

At 1.5m3In reactor, add ethene-vinyl acetate copolymer emulsion 900kg, after starting agitating device and stirring slightly,Add 50kg ethylene-vinyl acetate carboxylation modified emulsion, then with the speed dispersed with stirring of 80 revs/min 0.5 hour, then useThe NaHCO of 10w%3It is 7.5 that solution regulates the pH value of above-mentioned blending emulsion, continues dispersed with stirring 1 hour;

Then 50kg acrylate pressure-sensitive adhesive emulsion is added wherein, dispersed with stirring is after 30 minutes, with the polyethylene glycol of 3w%It is 1700mPas (23 DEG C, rotation viscometer) that solution regulates its viscosity, less with the speed dispersed with stirring 0.5 of 120 revs/minTime.

After finally filtering with 200 mesh sieves, pack, can obtain wood pencil environment-friendly type high performance water adhesive.

Embodiment 3

At 1.5m3In reactor, add ethene-vinyl acetate copolymer emulsion 750kg, after starting agitating device and stirring slightly,Add 80kg ethylene-vinyl acetate carboxylation modified emulsion, then with the speed dispersed with stirring of 60 revs/min 1 hour, then use 9w%NaHCO3It is 6.8 that solution regulates the pH value of above-mentioned blending emulsion, continues dispersed with stirring 0.5 hour.

Then 170kg acrylate pressure-sensitive adhesive emulsion is added wherein, dispersed with stirring is after 20 minutes, by the poly-second two of 3w%After alcoholic solution regulates its viscosity to be 1500mPas (23 DEG C, rotation viscometer), less with the speed dispersed with stirring 2 of 100 revs/minTime.

After finally filtering with 400 mesh sieves, pack, can obtain wood pencil environment-friendly type high performance water adhesive.

Embodiment 4

At 1.5m3In reactor, add ethene-vinyl acetate copolymer emulsion 850kg, after starting agitating device and stirring slightly,Add 50kg ethylene-vinyl acetate carboxylation modified emulsion, then with the speed dispersed with stirring of 70 revs/min 0.75 hour, then useThe NaHCO of 9w%3It is 7.0 that solution regulates the pH value of above-mentioned blending emulsion, continues dispersed with stirring 0.75 hour.

Then 100kg acrylate pressure-sensitive adhesive emulsion is added wherein, dispersed with stirring is after 30 minutes, by the poly-second two of 4w%It is 1800mPas (23 DEG C, rotation viscometer) that alcoholic solution regulates its viscosity, less with the speed dispersed with stirring 1 of 110 revs/minTime.

After finally filtering with 400 mesh sieves, pack, can obtain wood pencil environment-friendly type high performance water adhesive.

Embodiment 5

At 1.5m3In reactor, add ethene-vinyl acetate copolymer emulsion 800kg, after starting agitating device and stirring slightly,Add 100kg ethylene-vinyl acetate carboxylation modified emulsion, then with the speed dispersed with stirring of 60 revs/min 1 hour, then useThe NaHCO of 10w%3It is 7.2 that solution regulates the pH value of above-mentioned blending emulsion, continues dispersed with stirring 1 hour.

Then 100kg acrylate pressure-sensitive adhesive emulsion is added wherein, dispersed with stirring is after 20 minutes, by the poly-second two of 3w%After alcoholic solution regulates its viscosity to be 1900mPas (23 DEG C, rotation viscometer), then with the speed dispersed with stirring 1.5 of 100 revs/minHour.

After finally filtering with 200 mesh sieves, pack, can obtain wood pencil environment-friendly type high performance water adhesive.

Following table is aqueous adhesive and the existing commercially available Henkel KGaA white glue with vinyl in the embodiment of the present invention 1~5, respectively at leadThe correction data of performance test while being used as binding agent in process for making, the pencil sample that every kind of aqueous adhesive is made is surveyedExamination quantity is 50; The pencil groove of selected test wood pencil sample is linden, and pencil-lead is color core, is commercially available prod.

Slide core method of testing: the finished product pencil newly completing was placed after 10 days, selected arbitrarily presentation quality satisfactoryPencil sample, the 10kg that pressurizes on its pen core kept for 6 seconds.

Volume is cut experimental technique: the pencil sharpener of selecting arbitrarily the satisfactory pencil sample of presentation quality angle to be 30o entersRow volume is cut, the bonding situation of observing the volume falling down and cutting pen core and sheet material inside thing.

Soaked senile experiment method: the finished product pencil newly completing was placed after 10 days, selected arbitrarily presentation quality symbolThe pencil sample that closes requirement soaks 1 hour in the underwater of (40 ± 5) DEG C, turns penholder two ends after taking out in the other direction, observes plumbousPen has or not the phenomenon of coming unglued.

High temperature ageing experimental technique: the satisfactory pencil sample of presentation quality that selection newly completes arbitrarily puts into 60In DEG C baking oven, after 2 weeks, observe pencil and have or not the phenomenon of coming unglued.

High low temperature aging circulation experiment method: it is 50 DEG C, humidity that the finished product pencil sample newly completing is put into temperatureBe in 80% climatic chamber 36 hours, then put into freezing 36 hours of the refrigerator of-18 DEG C. After circulation in continuous 3 weeks, observePencil has or not the phenomenon of coming unglued.

Upper table experimental data fully reflects: the effect of all embodiment finished products of the present invention, is all better than prior art.

Claims (3)

1. a wood pencil environment-friendly type high performance water adhesive, is characterized in that by following formula composition:
Constituent percentage by weight (w%)
Ethene-vinyl acetate copolymer emulsion 70~90
Ethylene-vinyl acetate carboxylation modified emulsion 5~10
Acrylate pressure-sensitive adhesive emulsion 5~20;
The preparation method of environment-friendly type high performance water adhesive for described wood pencil, comprises the following steps:
(1) in reactor, add the ethene-vinyl acetate copolymer emulsion good by above-mentioned formula metering, start agitating device slightlyAfter being permitted to stir, add ethylene-vinyl acetate carboxylation modified emulsion, then with the speed dispersed with stirring 0.5 of 60~80 revs/min~1 hour, then use the NaHCO of 8~10w%3After solution regulates the pH value of above-mentioned blending emulsion to be 6.5~7.5, continue dispersed with stirring0.5~1 hour;
(2) then the acrylate pressure-sensitive adhesive emulsion measuring is added in aforesaid reaction vessel to dispersed with stirring 15~30 minutesAfter, regulating its viscosity with the polyglycol solution of 3~5w% is 1500~2000mPa.s, described viscosity is at 23 DEG C, by revolvingTurn viscosimeter and measure, then with the speed dispersed with stirring of 100~120 revs/min 0.5~2 hour;
(3) finally filter rear packaging with 200~400 mesh sieves, can obtain wood pencil environment-friendly type high performance water gluingAgent.
2. wood pencil according to claim 1 environment-friendly type high performance water adhesive, is characterized in that: described secondAlkene-acetate copolymer emulsion is the VAE-707 type produced of Beijing DongFang petroleum chemical engineering Co., Ltd. Organic Chemical Plant, watt gram poly-The mixture of one or more in EP706 type or EP707K type product that compound series (Nanjing) Co., Ltd produces.
3. wood pencil according to claim 1 environment-friendly type high performance water adhesive, is characterized in that: described thirdOlefin(e) acid ester pressure-sensitive emulsion is the GH2155 type product that Shanghai Huayi Acrylic Acid Co., Ltd. produces.
CN201410231820.1A 2014-05-29 2014-05-29 A kind of environment-friendly type high performance water adhesive and preparation method thereof for wood pencil CN104031581B (en)

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CN104531014A (en) * 2014-12-20 2015-04-22 李成功 Hot melt adhesive containing guar gum powder capable of gluing pencil holder
CN105440983B (en) * 2015-05-04 2017-08-08 湖南工业大学 One kind is applied to leather and non-polar plastic base material bonding aqueous binder
CN104974688A (en) * 2015-06-25 2015-10-14 安徽雪峰木业有限公司 Expandable graphite-containing flexible anti-aging modified polyvinyl acetate emulsion adhesive for pencils and preparation method thereof
CN104974690A (en) * 2015-06-25 2015-10-14 安徽雪峰木业有限公司 Nano-silica-containing enhanced modified polyvinyl acetate emulsion adhesive for pencils and preparation method thereof
CN104974691A (en) * 2015-06-25 2015-10-14 安徽雪峰木业有限公司 Nano-titania-containing antibacterial modified polyvinyl acetate emulsion adhesive for pencils and preparation method thereof
CN104974693A (en) * 2015-06-25 2015-10-14 安徽雪峰木业有限公司 Nano-alumina-containing corrosion-resistant long-acting modified polyvinyl acetate emulsion adhesive for pencils and preparation method thereof
CN105038658A (en) * 2015-06-25 2015-11-11 安徽雪峰木业有限公司 High-water-resistance modified polyvinyl acetate emulsion adhesive for pencils, and preparation method for adhesive
CN104974692A (en) * 2015-06-25 2015-10-14 安徽雪峰木业有限公司 Aromatic modified polyvinyl acetate emulsion adhesive for pencils and preparation method thereof
CN104974689A (en) * 2015-06-25 2015-10-14 安徽雪峰木业有限公司 High-adhesion nano-carbon sol-containing modified polyvinyl acetate emulsion adhesive for pencils and preparation method thereof
CN104974687A (en) * 2015-06-25 2015-10-14 安徽雪峰木业有限公司 Hollow glass microspheres-doped water-resistant modified polyvinyl acetate emulsion adhesive for pencils and preparation method thereof
CN105462519B (en) * 2015-12-31 2017-07-18 东莞铭丰生物质科技有限公司 A kind of world hamper and environment-friendly water-based adhesive and preparation method thereof
CN105482738B (en) * 2016-01-19 2017-06-06 湖南工业大学 One kind is applied to the special paper bonding aqueous binder of high speed gluing machine
CN107384253A (en) * 2017-08-16 2017-11-24 华威粘结材料(上海)股份有限公司 A kind of pencil glue and preparation method thereof

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