CN104592912A - Modified adhesive for manufacturing formaldehyde-free artificial boards - Google Patents
Modified adhesive for manufacturing formaldehyde-free artificial boards Download PDFInfo
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- CN104592912A CN104592912A CN201510053427.2A CN201510053427A CN104592912A CN 104592912 A CN104592912 A CN 104592912A CN 201510053427 A CN201510053427 A CN 201510053427A CN 104592912 A CN104592912 A CN 104592912A
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Abstract
The invention relates to a modified adhesive for manufacturing formaldehyde-free artificial boards. Components of the modified adhesive include polyvinyl acetate adhesive, polyurethane adhesive and/or acrylate adhesive and a curing agent, wherein the weight percentage of the curing agent is 0-1%. The polyurethane adhesive with good elasticity, strong toughness, high tensile splitting strength, ageing resistance, good adhesion and resistance to cold water and boiling water and/or the acrylate adhesive with strong adherence, ageing resistance, weather resistance and good flexibility and the polyvinyl acetate adhesive are mixed and blended, thus, the modified adhesive has good cold-press adhesion performance and waterproofness, and no toxic gas such as formaldehyde is generated in the production procedure; moreover, the modified adhesive can be directly used for machining artificial boards without addition or transformation of old mechanical equipment and operation modes which are adopted for a long time and become familiar do not need to be changed, and therefore the modified adhesive can be accepted easily by artificial board manufacturers, which is beneficial to popularization and promotion.
Description
Technical field
The invention belongs to man-made board technology field, particularly relate to a kind of modified adhesive manufacturing Formaldehyde Free Wood-based Panel.
Background technology
Along with the Economic development of the mankind and the new line of environmental consciousness, all over the world, especially developed country, developing country are for the regulation of the burst size of methanal of various wood-based plate (comprising glued board, shaving board, fiberboard and core-board) and requirement, more and more stricter, therefore, relevant expert, scholar also research and develop manufacture method and the relative adhesive of various low formaldehyde or zero formaldehyde wood-based plate by every means.
At present, wood-based plate process industry still uses adhesive made of synthetic resin widely, such as, and urea formaldehyde resins glue, melamine-formaldehyde resin adhesive, Phenol aldehyde resin, these traditional synthetic resins all contain the formaldehyde of toxic human body, should progressively replace by the tackiness agent of more environmental protection.
It is reported, in recent years at the manufacture workshop of some plywood production factories or multi-layer solid wood floor base material, brought into use not containing the tackiness agent of formaldehyde, produce containing the glued board of formaldehyde, these containing the tackiness agent of formaldehyde, approximately can not be divided into three to be greatly class:
The first kind for use epoxy resin, this resinoid not containing formaldehyde and also bonding strength good especially, unfortunately, in use, operate more inconvenient, and price is high, therefore, can't be generally used.
Equations of The Second Kind is amylan, such as rubber made from soybean cake, and not containing formaldehyde, price is also cheaper, but bonding strength is poor, and difficulty reaches the requirement of type Ⅰ plywood.
3rd class is for using the solid-state tackiness agent of thermoplastic film like, this kind of tackiness agent is not also containing formaldehyde, possesses excellent bonding strength, price is also moderate, just need first hot pressing in the production process manufacturing glued board, then just to cold pressing cooling, this is not identical with the production technique of traditional (precompressed) ability hot pressing of first colding pressing, in addition, also need the condition of supporting high temperature (about 200 DEG C) hot pressing, therefore, ready-made traditional type workshop is generalized to, need some funds to transform mechanical means, this is the Major Difficulties promoting thermoplasticity glued membrane.
Summary of the invention
For solving the above-mentioned problems in the prior art, the invention provides and a kind of there is excellent Cold-press adhesion performance and water resistance, the toxic gases such as formaldehyde can not be produced in production process, and can when not needing add or transform old mechanical means, be directly used in processing artificial boards, also need not change the operator scheme of long-term habits, be easy to the modified adhesive received by wood-based plate producer.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
Manufacture a modified adhesive for Formaldehyde Free Wood-based Panel, its component comprises polyvinyl acetate glue, polyurethane ester gum and/or acrylate adhesive, solidifying agent, and wherein the weight percent of solidifying agent is 0 ~ 1%.
Further, described modified adhesive is the tackiness agent being applicable to manufacture I class wood-based plate, its by the polyvinyl acetate glue of 37 ~ 68%, the polyurethane ester gum of 31 ~ 62% and/or acrylate adhesive, 0 ~ 1% solidifying agent be mixed with and form.
Further, in described " the polyurethane ester gum of 31 ~ 62% and acrylate adhesive ", the ratio of polyurethane ester gum and acrylate adhesive is 1:1.
Further, described modified adhesive is the modified adhesive being applicable to manufacture II class wood-based plate, its by the polyvinyl acetate glue of 58 ~ 68%, the polyurethane ester gum of 21 ~ 31% and/or acrylate adhesive, 0 ~ 1% solidifying agent, the starch-type weighting agent of 5 ~ 5.5%, the water of 5 ~ 5.5% be mixed with and form.
Further, in described " the polyurethane ester gum of 21 ~ 31% and acrylate adhesive ", the ratio of polyurethane ester gum and acrylate adhesive is 1:1.
Further, described starch-type weighting agent is flour and/or bean powder.
The invention has the beneficial effects as follows:
The present invention, by technique scheme, can have excellent Cold-press adhesion performance and water resistance, also can not produce the toxic gases such as a large amount of formaldehyde in production process, both ensure the personnel safety of direct labor, also can not cause the pollution of surrounding enviroment; And when not needing add or transform old mechanical means, being directly used in processing artificial boards, also need not changing the operator scheme of long-term habits, to be easy to receive by wood-based plate producer, be conducive to penetration and promotion.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
A kind of modified adhesive manufacturing Formaldehyde Free Wood-based Panel of the present invention, its component comprises polyvinyl acetate glue, polyurethane ester gum and/or acrylate adhesive, solidifying agent, and wherein the weight percent of solidifying agent is 0 ~ 1%.
Embodiment one:
A kind of modified adhesive manufacturing Formaldehyde Free Wood-based Panel described in the embodiment of the present invention is the tackiness agent being applicable to manufacture I class wood-based plate, its by the polyvinyl acetate glue of 37 ~ 68%, the polyurethane ester gum of 31 ~ 62% and/or acrylate adhesive, 0 ~ 1% solidifying agent be mixed with and form; Wherein, in described " the polyurethane ester gum of 31 ~ 62% and acrylate adhesive ", the ratio of polyurethane ester gum and acrylate adhesive is the 1:1(i.e. polyurethane ester gum of 15.5 ~ 31% and the acrylate adhesive of 15.5 ~ 31%).
The gluing component of following two examples and the ratio of component of adopting of modification being applicable to manufacture I class wood-based plate of the present invention is prepared from.
Example one: polyvinyl acetate glue 100 parts
polyurethane ester gum (or acrylate adhesive) 50 parts
1.5 parts, solidifying agent.
Example two: polyvinyl acetate glue 100 parts
polyurethane ester gum 25 parts
acrylate adhesive
25 parts
1.5 parts, solidifying agent.
Modified adhesive of the present invention is by adopting good springiness, toughness is strong, tensile splitting strength is large, not easily aging, adhesion property is good, the polyurethane ester gum of resistance to cold water and boiling water and/or adhesion strong, ageing resistance, weathering resistance, the acrylate adhesive that flexibility is good and polyvinyl acetate glue mixing preparation form, both there is excellent Cold-press adhesion performance, adhesive capacity is between 800 ~ 1800 centipoises, for in wood-based plate manufacturing process, for the cold pressing process after wood single-plate gluing, benefit much, good water resistance can be had again, greatly improve the water-repellancy of wood-based plate, tested by the dipping and stripping of 100 DEG C of boiling water, meet the national standard of I class wood-based plate (as glued board) and relevant international standard, the life stage (required time after mixing by various material to glue sclerosis) of the tackiness agent of above-mentioned each component ratio allotment is adopted to be not less than the twice of operating time, avoid because of the too short thus easy premature cure of glue of life stage, cause the problem that bonding strength after hot pressing is bad, and also can not produce the toxic gases such as a large amount of formaldehyde in production process, both ensure the personnel safety of direct labor, also can not cause the pollution of surrounding enviroment, be conducive to penetration and promotion.
In addition, modified adhesive of the present invention is also (precompressed) hot pressing afterwards of first colding pressing in use, and hot pressing temperature also only needs 110 DEG C ± 5 DEG C, this operation is similar to traditional manufacturing process, therefore, when not needing add or transform old mechanical means, processing artificial boards is directly used in, also need not change the operator scheme of long-term habits, to be easy to receive by wood-based plate producer.
Embodiment two:
The modified adhesive manufacturing Formaldehyde Free Wood-based Panel described in the invention process can also be the modified adhesive being applicable to manufacture II class wood-based plate, its by the polyvinyl acetate glue of 58 ~ 68%, the polyurethane ester gum of 21 ~ 31% and/or acrylate adhesive, 0 ~ 1% solidifying agent, the starch-type weighting agent of 5 ~ 5.5%, the water of 5 ~ 5.5% be mixed with and form; Wherein, in described " the polyurethane ester gum of 21 ~ 31% and acrylate adhesive ", the ratio of polyurethane ester gum and acrylate adhesive is 1:1; Described starch-type weighting agent is flour and/or bean powder.
The gluing component of following three examples and the ratio of component of adopting of modification being applicable to manufacture II class wood-based plate of the present invention is prepared from.
Example one: polyvinyl acetate (PVA) 100 parts
Polyurethane(s) 35 parts
1 part, solidifying agent
8 parts, flour
8 parts, water.
Example two: polyvinyl acetate (PVA) 100 parts
Acrylate 30 parts
1 part, solidifying agent
8 parts, flour
8 parts, water.
Example three: polyvinyl acetate (PVA) 100 parts
Polyurethane(s) 16 parts
Acrylate 16 parts
1 part, solidifying agent
8 parts, flour
8 parts, water.
Similarly, modification described in the embodiment of the present invention two is gluing by adopting good springiness, toughness is strong, tensile splitting strength is large, not easily aging, adhesion property is good, the polyurethane ester gum of resistance to cold water and boiling water and/or adhesion strong, ageing resistance, weathering resistance, the acrylate adhesive that flexibility is good and polyvinyl acetate glue mixing preparation form, both there is excellent Cold-press adhesion performance, adhesive capacity is between 800 ~ 1800 centipoises, for in wood-based plate manufacturing process, for the cold pressing process after wood single-plate gluing, benefit much, good water resistance can be had again, greatly improve the water-repellancy of wood-based plate, tested by the dipping and stripping of 63 DEG C of hot water, meet the national standard of II class wood-based plate (as glued board) and relevant international standard, simultaneously by adding the starch-type weighting agent both mixed viscosity of adjustable whole tackiness agent, commissure can be filled and led up again for coarse wood single-plate, also can reduce tackiness agent cost of manufacture, simultaneously the tackiness agent of above-mentioned each component ratio allotment there will not be premature cure thus the problem that bonding strength is bad after causing hot pressing, and also can not produce the toxic gases such as a large amount of formaldehyde in production process, both ensure the personnel safety of direct labor, also can not cause the pollution of surrounding enviroment, be conducive to penetration and promotion.Also be (precompressed) hot pressing afterwards of first colding pressing in use, and hot pressing temperature also only needs 110 DEG C ± 5 DEG C, this operation is similar to traditional manufacturing process, therefore, when not needing add or transform old mechanical means, be directly used in processing artificial boards, also need not change the operator scheme of long-term habits, to be easy to receive by wood-based plate producer.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (6)
1. manufacture a modified adhesive for Formaldehyde Free Wood-based Panel, it is characterized in that: its component comprises polyvinyl acetate glue, polyurethane ester gum and/or acrylate adhesive, solidifying agent, wherein the weight percent of solidifying agent is 0 ~ 1%.
2. the modified adhesive of manufacture Formaldehyde Free Wood-based Panel according to claim 1, it is characterized in that: described modified adhesive is the tackiness agent being applicable to manufacture I class wood-based plate, its by the polyvinyl acetate glue of 37 ~ 68%, the polyurethane ester gum of 31 ~ 62% and/or acrylate adhesive, 0 ~ 1% solidifying agent be mixed with and form.
3. the modified adhesive of manufacture Formaldehyde Free Wood-based Panel according to claim 2, is characterized in that: in described " the polyurethane ester gum of 31 ~ 62% and acrylate adhesive ", the ratio of polyurethane ester gum and acrylate adhesive is 1:1.
4. the modified adhesive of manufacture Formaldehyde Free Wood-based Panel according to claim 1, it is characterized in that: described modified adhesive is the modified adhesive being applicable to manufacture II class wood-based plate, its by the polyvinyl acetate glue of 58 ~ 68%, the polyurethane ester gum of 21 ~ 31% and/or acrylate adhesive, 0 ~ 1% solidifying agent, the starch-type weighting agent of 5 ~ 5.5%, the water of 5 ~ 5.5% be mixed with and form.
5. the modified adhesive of manufacture Formaldehyde Free Wood-based Panel according to claim 4, is characterized in that: in described " the polyurethane ester gum of 21 ~ 31% and acrylate adhesive ", the ratio of polyurethane ester gum and acrylate adhesive is 1:1.
6. the modified adhesive of manufacture Formaldehyde Free Wood-based Panel according to claim 4, is characterized in that: described starch-type weighting agent is flour and/or bean powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510053427.2A CN104592912A (en) | 2015-02-03 | 2015-02-03 | Modified adhesive for manufacturing formaldehyde-free artificial boards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510053427.2A CN104592912A (en) | 2015-02-03 | 2015-02-03 | Modified adhesive for manufacturing formaldehyde-free artificial boards |
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| CN104592912A true CN104592912A (en) | 2015-05-06 |
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| CN201510053427.2A Pending CN104592912A (en) | 2015-02-03 | 2015-02-03 | Modified adhesive for manufacturing formaldehyde-free artificial boards |
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Citations (6)
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| CN101045847A (en) * | 2006-03-31 | 2007-10-03 | 中国科学院过程工程研究所 | Adhesive and paint for absorbing formol |
| CN101633826A (en) * | 2008-07-25 | 2010-01-27 | 宁波松鹤文具有限公司 | Toy glue and method for preparing same |
| CN101717611A (en) * | 2009-11-20 | 2010-06-02 | 中钞特种防伪科技有限公司 | Aqueous hot stamping glue, and applications and preparation method thereof |
| CN102101991A (en) * | 2010-12-27 | 2011-06-22 | 青岛爱尔家佳新材料有限公司 | Aqueous wire coating adhesive and preparation method thereof |
| CN102639326A (en) * | 2009-11-25 | 2012-08-15 | 泰华施公司 | Surface coating system and method of using surface coating system |
| CN103360985A (en) * | 2013-07-05 | 2013-10-23 | 全椒海丰印刷包装有限公司 | Natural rubber packing adhesive and preparation method thereof |
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2015
- 2015-02-03 CN CN201510053427.2A patent/CN104592912A/en active Pending
Patent Citations (6)
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|---|---|---|---|---|
| CN101045847A (en) * | 2006-03-31 | 2007-10-03 | 中国科学院过程工程研究所 | Adhesive and paint for absorbing formol |
| CN101633826A (en) * | 2008-07-25 | 2010-01-27 | 宁波松鹤文具有限公司 | Toy glue and method for preparing same |
| CN101717611A (en) * | 2009-11-20 | 2010-06-02 | 中钞特种防伪科技有限公司 | Aqueous hot stamping glue, and applications and preparation method thereof |
| CN102639326A (en) * | 2009-11-25 | 2012-08-15 | 泰华施公司 | Surface coating system and method of using surface coating system |
| CN102101991A (en) * | 2010-12-27 | 2011-06-22 | 青岛爱尔家佳新材料有限公司 | Aqueous wire coating adhesive and preparation method thereof |
| CN103360985A (en) * | 2013-07-05 | 2013-10-23 | 全椒海丰印刷包装有限公司 | Natural rubber packing adhesive and preparation method thereof |
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| 夏文干等: "《胶接手册》", 28 February 1089 * |
| 李红强: "《胶粘原理、技术及应用》", 31 January 2014 * |
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Application publication date: 20150506 |
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