CN104692225A - V-shaped TPU handrail and preparation method thereof - Google Patents
V-shaped TPU handrail and preparation method thereof Download PDFInfo
- Publication number
- CN104692225A CN104692225A CN201510039424.3A CN201510039424A CN104692225A CN 104692225 A CN104692225 A CN 104692225A CN 201510039424 A CN201510039424 A CN 201510039424A CN 104692225 A CN104692225 A CN 104692225A
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- handrail
- tpu
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- preparation
- type bar
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B23/00—Component parts of escalators or moving walkways
- B66B23/22—Balustrades
- B66B23/24—Handrails
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D29/00—Producing belts or bands
Abstract
The invention provides a V-shaped TPU handrail and a preparation method thereof. The V-shaped TPU handrail is formed by adhering a V-shaped strip to a flat handrail through a moisture-cured hot melt adhesive. The adhesive force between the V-shaped strip and the abdomen sliding layer of the flat-type handrail can reach 8.17 N/mm, so that the V-shaped handrail can be applied to a heavy-load escalator or an automatic sidewalk.
Description
Technical field
The present invention relates to the technical field of escalator, especially relate to the V-type handrail utilizing TPU material to prepare.
Background technology
Escalator obtains extensive application in public places, the handrail being usually used in escalator or moving sidewalk is with flat rubber belting or C type and two kinds, V-type band, the former is mainly used in general items in commerce escalator as not high in hoisting depth or moving sidewalk, the latter is mainly used in public transport, requires that handrail has heavily loaded escalator or the moving sidewalk of more large driving force.Handrail prepares the current multiselect elastomeric material of material or TPU thermoplastic material (also known as TPUE plastic cement); Because caoutchous material property defect is as little in rigidity or price is more expensive etc., replaced by thermoplastic polyurethane material's plastic cement gradually.
Thermoplastic polyurethane elastomer is by the High molecular material of diisocyanate quasi-molecule and macromolecular polyol, the common reactive polymeric of low molecular polylol, and molecular structure is that the soft segment that the hard block and diisocyanate that are obtained by reacting by isocyanates and chain extender and macromolecular polyol are obtained by reacting alternately is formed; Its Patent CN101323409A provides in handrail and manufacture method thereof, describing armrest is adopt thermoplastic elastic thing or polyurethane material to form, and Japanese Patent JP3604687 and Chinese patent CN101323409A provides handrail and the dependency structure of thermoplastic material formation.TPU molding process planning comprises the mode of injection moulding, blowing, compression forming and extrusion molding, at present, TPUE plastic cement (TPU) is generally applied to the preparation of handrail, existing TPU handrail only has the flat rubber belting that only can be used for the not high escalator of degree of lifting or moving sidewalk a kind of, this is because when adopting TPU material to prepare handrail, normally, select the technique of extrusion molding, thermoplastic macromolecule material and steel wire or fibre-glide layer are made the C type handrail of homoplasmon, and when preparing V-type handrail, as shown in Figure 1, because the basic flat pattern handrail of V-type handrail selects different TPU material to tackle different stress condition with the V-type bar being positioned at centre, first the flat pattern handrail and the V-type bar that are adopting the method for extrusion molding to obtain not homoplasmon respectively, then V-type bar peace Armrest band is assembled, the performance of current assembling V handrail is lower, although in current technology, if application number is the Chinese patent etc. of 201010267391.5, provide the structure of V-type handrail, be confined to the poor caoutchous material of pull resistance more, lack actv. and utilize TPU material to prepare the method for V handrail.
Meanwhile, TPU materials application, in multiple fields product, depends on its interpolation material reacted; With recording TPU polymer Typical in patent CN101977995A by making hydroxy-end capped polyethers or hydroxy-end capped polyester, chain extender and isocyanate compound react and prepare, and the TPU poly-mer of the preparation of three kinds of reactants can be used for various field; Patent CN101166774A is loaded with about adding plasticizer to increase its performance in basic reaction thing, provides the novel TPU elastic body of the handrail being applied to elevator in international monopoly WO2009076768; At present, preparing handrail, thermoplastic polyurethane material (TPU) comprises above-mentioned fundamental reaction thing as filler and the lubricant in order to improve handrail performance, because melt viscosity is comparatively obvious to extrusion process, extruding to add often causes discharging uneven man-hour, add lubricant stable melt viscosity, improving processing characteristics can improve the quality of products simultaneously; In preparation feedback process, lubricant can migrate to surface under high-temperature treatment condition, form structural barrier thus there is the certain lubricity in surface, but V-type handrail can be caused to carry out assembling and only can be confined to mechanical package and gummed connection mode can not be adopted due to the existence of lubricant; A kind of assembled armrest belt provided in patent CN101927942A, card article is utilized to be fixed by middle fixed part (V-type bar), be confined to the handrail of elastomeric material and mechanical assembling can cause producing mechanical hard defects when using, affect service life.To sum up current, based on the particularity of TPU material, in prior art, lack the V-type handrail with the gummed of certain performance.
Summary of the invention
The object of the present invention is to provide a kind of TPU handrail of V-type, solve the defect of the TPU flat rubber belting handrail only had at present for general commercial place, expand the field of application of TPU handrail.
One aspect of the present invention provides a kind of V-type TPU handrail, and it adopts moisture-curable hot melt adhesive to be bonded by V-type bar and flat pattern handrail.
Wherein, the physical and chemical parameter of described V-type bar is as follows: hardness is 89-95A, and fusion index is 8-15g/10min, and density is 1.18-1.25mg/m
3, water ratio <0.2%, glass transition temperature is-20 ± 5 DEG C, and pulling strengrth is 45-55Mpa, and breaking elongation is 350-450%.
On the other hand, the invention still further relates to a kind of preparation method of V-type TPU handrail, its step is as follows:
1) TPU material is adopted to extrude obtained flat pattern handrail and V-type bar respectively;
2) utilize purging medium to step 1) in preparation V-type bar adhesive surface clean;
3) moisture-curable hot melt adhesive be heated to 20 ~ 180 DEG C and be coated on the adhesive surface of flat pattern handrail, then V-type bar is pasted onto the adhesive surface place of flat pattern handrail, and apply the pressure of 0.1Mpa ~ 10Mpa, after keeping 2s ~ 300s, obtain V-type TPU handrail.
Wherein, moisture-curable hot melt adhesive, having another name called damp solidifying polyurethane hot melt adhesive or moisture-curable polyurethane hot melt adhesive, is hold-NCO based prepolymers for base-material, is equipped with the additive such as nonreactive thermoplastic base resin, tackifying resin, antioxidant, catalyst, filler with NCO and forms.During use, hot melt adhesive heating and melting fluidly after, be coated in by sticky base material (flat pattern handrail) surface, adherend is bonded, bonding is formed after cooling, utilize the moisture in air afterwards or by the micro-moisture in sticky base material and other compounds containing active hydrogen with NCO group reacts, chain extension, generation cross-linked structure and have the poly-mer of high cohesion, makes cohesive force strengthen further.NCO group in isocyanates is very easily reacted with the compound containing active hydrogen, main chemical reactions comprises-and the reactant of NCO group and water or other active hydrogen compounds and isocyanate groups react and generate allophanate, ureido groups and isocyanates react generation biuret structure, wherein above-mentioned reactant carbamate chain link and urea chain link polarity very high, form being rigidly connected of polyurethane molecular structure, its heating-up temperature is the principal element of impact reaction.
TPU mainly by diisocyanate, polyalcohols and chain extender three class basic material carry out processing reaction and form; TPU is that a class heats the poly-mer that can plastify, and less in chemical constitution exist chemical crosslinking, and the linear structure mainly with molecule exists, and but there is a certain amount of physical crosslinking, therefore is called thermoplastic polyurethane.Moisture-curable hot-melt after adopting heating in the application is overlying on the flat rubber belting handrail of TPU material, TPU under the action of heat, its linear polymer physical crosslinking, simultaneously when hot melt adhesive completes chemical crosslinking, TPU linear polymer can participate in its reaction, adhesive force between V-type bar obtained after two kinds of cross-linking reactions and flat pattern handrail can higher than existing V-type handrail, and can meet its being suitable at heavy-load type escalator or moving sidewalk completely.Illustrated preparation method, makes V-type polyurethane handrail have simple structure, and operating procedure is simple, environmental protection, simplifies existing production technology and reduces waste of material.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of V-type handrail;
The detection data of the adhesive force between the V-type bar of the V-type handrail of Fig. 2 prepared by the present invention and handrail belly sliding layer.
Wherein, 1-flat pattern handrail, 2-V type bar.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, be clearly and completely described technical scheme of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The present invention relates to the V-type handrail adopting TPU material to be prepared; Wherein TPU, TPUE, is the linear block copolymers be made up of with the hard section of diisocyanate-chain extender soft section of oligomer polyol, has caoutchouc elasticity and plastic properties under room temperature, can be melt into rheid under high temperature; Simultaneously to add man-hour temperature comparatively responsive to extruding for rheid, adds lubricant stable melt viscosity and improve processing characteristics.During enforcement, TPU material can purchased from company, and adopts the mode extruded to prepare flat pattern handrail respectively and cross section is trapezoidal V-type bar, and those skilled in the art obtain corresponding or TPU handrail structure of the present invention according to known TPU production technology.When V-type handrail uses, V-type bar coordinates with the friction layer of handrail drive wheel, and in order to drive the rotation of whole handrail, wherein in the present invention, the requirement parameter of V-type bar is: hardness is 89-95A (shore hardness), fusion index is 8-15g/10min, and density is 1.18-1.25mg/m
3, water ratio <0.2%, glass transition temperature is-20 ± 5 DEG C, is pulling strengrth 45-55Mpa, and breaking elongation is 350-450%, the performance that the entirety in order to meet V-type handrail uses; Wherein, the testing standard that hardness adopts is ASTMD2240-00, the testing standard that fusion index adopts is 190 DEG C/8700ASTM D1238, the testing standard that density adopts is ASTM D-792-98A, the testing standard that pulling strengrth adopts is ASTM D412-02, and the testing standard that breaking elongation adopts is ASTM D412-02.The above-mentioned parameter of V-type strip adoption of the present invention can make V-type bar show higher performance in handrail use procedure, the overall quality improving whole handrail.
In preparation method, adopt the adhesive surface of cleaning agent to flat pattern handrail and V-type bar carry out clean after, then at the surface coating moisture-curable hot melt adhesive of its adhesive surface, cleaning agent is preferably organic solvent class purging medium, can select ether, acetone class purging medium; Moisture-curable hot melt adhesive composition is base polyurethane prepolymer for use as, and during effect, meeting polymerization reaction take place, can select the hot melt adhesive product of BASF AG or Henkel KGaA company.The heating-up temperature of moisture-curable hot melt adhesive is also to reaction outbalance, heating-up temperature selects 20 ~ 180 DEG C, preferably adopts heating-up temperature to be 100 DEG C-150 DEG C, at described temperature, moisture-curable hot melt adhesive completes final polymerization reaction, completes the intermolecular physical crosslinking with TPU simultaneously.During enforcement, hot melt gun is adopted to heat hot melt adhesive, and be coated in the adhesive surface place (center of handrail belly sliding layer) of flat pattern handrail, with after-applied 0.1Mpa ~ 10Mpa pressure, preferably pressure is 1.0Mpa ~ 10Mpa, keep 2s ~ 300s, preferably after 5 ~ 120s and get final product; The physical crosslinking between hot melt adhesive and TPU is completed under described pressure and time.
Make the V-type TPU handrail obtained according to the inventive method, the adhesive force between the belly sliding layer of V-type bar and flat pattern handrail can reach 8.17N/mm, can meet V-type handrail and be applied to requirement on heavily loaded escalator or moving sidewalk.Specific embodiment is as follows, and with reference to V-type handrail structure shown in Fig. 1;
Embodiment 1
1) adopting TPU material to extrude cross section is trapezoidal V-type bar and flat pattern handrail;
2) adhesive surface of ether purging medium to V-type bar is used to clean;
3) by hot melt gun, moisture-curable hot melt adhesive is heated to 140 DEG C, is then coated in the center of the belly sliding layer of handrail;
4) V-type bar is pasted onto the center of handrail belly sliding layer, applies the pressure of 5Mpa and after keeping 15s, obtain V-type TPU handrail.
Embodiment 2
1) adopting TPU material to extrude cross section is trapezoidal V-type bar and flat pattern handrail;
2) adhesive surface of acetone purging medium to V-type bar is used to clean;
3) by hot melt gun, moisture-curable hot melt adhesive is heated to 100 DEG C, is then coated in the center of the belly sliding layer of handrail;
4) V-type bar is pasted onto the center of handrail belly sliding layer, applies the pressure of 10Mpa and after keeping 5s, obtain V-type TPU handrail.
Embodiment 3
1) adopting TPU material to extrude cross section is trapezoidal V-type bar and flat pattern handrail;
2) adhesive surface of ethanol purge agent to V-type bar is used to clean;
3) by hot melt gun, moisture-curable hot melt adhesive is heated to 150 DEG C, is then coated in the center of the belly sliding layer of handrail;
4) V-type bar is pasted onto the center of handrail belly sliding layer, applies the pressure of 1Mpa and after keeping 120s, obtain V-type TPU handrail.
Embodiment 4
1) adopting TPU material to extrude cross section is trapezoidal V-type bar and flat pattern handrail;
2) adhesive surface of acetone purging medium to V-type bar is used to clean;
3) by hot melt gun, moisture-curable hot melt adhesive is heated to 20 DEG C, is then coated in the center of the belly sliding layer of handrail;
4) V-type bar is pasted onto the center of handrail belly sliding layer, applies the pressure of 10Mpa and after keeping 300s, obtain V-type TPU handrail.
Embodiment 5
1) adopting TPU material to extrude cross section is trapezoidal V-type bar and flat pattern handrail;
2) adhesive surface of ethanol purge agent to V-type bar is used to clean;
3) by hot melt gun, moisture-curable hot melt adhesive is heated to 180 DEG C, is then coated in the center of the belly sliding layer of handrail;
4) V-type bar is pasted onto the center of handrail belly sliding layer, applies the pressure of 0.1Mpa and after keeping 60s, obtain V-type TPU handrail.
Embodiment 6
1) adopting TPU material to extrude cross section is trapezoidal V-type bar and flat pattern handrail;
2) adhesive surface of ether purging medium to V-type bar is used to clean;
3) by hot melt gun, moisture-curable hot melt adhesive is heated to 150 DEG C, is then coated in the center of the belly sliding layer of handrail;
4) V-type bar is pasted onto the center of handrail belly sliding layer, applies the pressure of 10Mpa and after keeping 2s, obtain V-type TPU handrail.
V-type TPU handrail prepared by present invention process carries out performance test experiments (embodiment 1-3), and with reference to shown in Fig. 2, test result is as follows:
Embodiment 1
Mean force=15.0353N/mm (Newton/millimeter, lower same), minimum force=11.7726N/mm, maximum peak force=17.0518N/mm, minimum peak force=12.0910N/mm, mean peak force=13.221N/min, meta peak force=12.4303N/mm.
Embodiment 2
Mean force=11.7865N/mm, minimum force=0.9202N/mm, maximum peak force=14.5534N/mm, minimum peak force=11.3199N/mm, mean peak force=12.0625N/min, meta peak force=12.0241N/mm.
Embodiment 3
Mean force=9.7213N/mm, minimum force=1.0024N/mm, maximum peak force=14.6668N/mm, minimum peak force=6.1277N/mm, mean peak force=10.8707N/min, meta peak force=11.5358N/mm.
Embodiment aviation value
Mean force=12.181N/mm, minimum force=4.5650N/mm, maximum peak force=14.7573N/mm, minimum peak force=9.8462N/mm, mean peak force=12.0514N/min, meta peak force=11.9967N/mm.
Through test, about average adhesion before the V-type bar of TPUE plastic cement and handrail belly sliding layer can arrive 12 Newton/millimeter, meet V-type handrail and be applied to requirement on heavily loaded escalator or moving sidewalk, and then expand the field of application of TPU handrail.During enforcement, can utilize and above-mentioned prepare the staircase that handrail is applied to heavily loaded class.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a V-type TPU handrail, is characterized in that, adopts moisture-curable hot melt adhesive to be bonded by V-type bar and flat pattern handrail.
2. V-type TPU handrail as claimed in claim 1, it is characterized in that, the physical and chemical parameter of described V-type bar is as follows: hardness is 89-95A, and fusion index is 8-15g/10min, and density is 1.18-1.25mg/m
3, water ratio is <0.2%, and glass transition temperature is-20 ± 5 DEG C, and pulling strengrth is 45-55Mpa, and breaking elongation is 350-450%.
3. a preparation method for V-type TPU handrail, is characterized in that, step is as follows:
1) TPU material is adopted to extrude obtained flat pattern handrail and V-type bar respectively;
2) utilize purging medium to step 1) in preparation V-type bar adhesive surface clean;
3) moisture-curable hot melt adhesive be heated to 20 ~ 180 DEG C and be coated on the corresponding adhesive surface of flat pattern handrail, then V-type bar is pasted onto the adhesive surface place of flat pattern handrail, and apply the pressure of 0.1Mpa ~ 10Mpa, after keeping 2s ~ 300s, obtain V-type TPU handrail.
4. the preparation method of V-type TPU handrail as claimed in claim 3, it is characterized in that, the physical and chemical parameter of described V-type bar is as follows: hardness is 89-95A, and fusion index is 8-15g/10min, and density is 1.18-1.25mg/m
3, water ratio <0.2%, glass transition temperature is-20 ± 5 DEG C, and pulling strengrth is 45-55Mpa, and breaking elongation is 350-450%.
5. the preparation method of the V-type TPU handrail as described in claim 3 or 4, is characterized in that, step 2) described in purging medium be organic solvent class purging medium.
6. the preparation method of the V-type TPU handrail as described in claim 3 or 4, is characterized in that, step 3) described in heating-up temperature be 100 DEG C-150 DEG C.
7. the preparation method of the V-type TPU handrail as described in claim 3 or 4, is characterized in that, step 3) described in applied pressure be 1.0Mpa ~ 10Mpa.
8. the preparation method of the V-type TPU handrail as described in claim 3 or 4, is characterized in that, step 3) in, the holding time is 5s ~ 120s.
9. utilize the handrail that described in any one of claim 3-8 claim prepared by method.
10. comprise the staircase of handrail described in claim 1,2 or claim 9.
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| CN201510039424.3A CN104692225B (en) | 2015-01-26 | 2015-01-26 | A kind of V-type TPU handrails and preparation method thereof |
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| CN106079185A (en) * | 2016-06-28 | 2016-11-09 | 依合斯电梯扶手（上海）有限公司 | V-type elevator handrail molding device |
| CN107055296A (en) * | 2017-06-05 | 2017-08-18 | 依合斯电梯扶手（上海）有限公司 | A kind of conveyer belt based on elevator handrail |
| CN110041688A (en) * | 2019-04-28 | 2019-07-23 | 南通江中光电有限公司 | A kind of formula of escalator handrail |
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| CN106079185A (en) * | 2016-06-28 | 2016-11-09 | 依合斯电梯扶手（上海）有限公司 | V-type elevator handrail molding device |
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| CN107055296A (en) * | 2017-06-05 | 2017-08-18 | 依合斯电梯扶手（上海）有限公司 | A kind of conveyer belt based on elevator handrail |
| CN110041688A (en) * | 2019-04-28 | 2019-07-23 | 南通江中光电有限公司 | A kind of formula of escalator handrail |
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| Publication number | Publication date |
|---|---|
| CN104692225B (en) | 2017-05-31 |
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