CN104111199A - Method and device for testing heat-resistant property of hot-melt adhesive - Google Patents
Method and device for testing heat-resistant property of hot-melt adhesive Download PDFInfo
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- CN104111199A CN104111199A CN201410374459.8A CN201410374459A CN104111199A CN 104111199 A CN104111199 A CN 104111199A CN 201410374459 A CN201410374459 A CN 201410374459A CN 104111199 A CN104111199 A CN 104111199A
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Abstract
The invention relates to a method and a device for testing the heat-resistant property of a hot-melt adhesive, and belongs to the technical field of property testing of the hot-melt adhesive. The method comprises the following steps of: preparing an adhesive block coated with steel wires, and then placing the adhesive block into an adhesive block fixing clamp; respectively embedding the steel wires into corresponding grooves, then fixing one end of the connecting piece of the adhesive block fixing clamp to a lower clamp of a tensile testing machine, and connecting the steel wire positioned on the other end of the connecting piece of the adhesive block fixing clamp to an upper clamp of the tensile testing machine; respectively testing the force used in pulling the adhesive block out of the steel wires at different temperature, and judging the heat-resistant property according to the variation degree of the force. By adopting the technology, the method disclosed by the invention completes the evaluation of the heat-resistant property of the hot-melt adhesive; the method disclosed by the invention is scientific, accurate, high in feasibility, simple and easy to operate, fills a blank and increases a very valuable testing method for an evaluating system of the heat-resistant property of the domestic hot-melt adhesive because an obtained result can objectively and visually show the heat-resistant property of the hot-melt adhesive and is suitable for being popularized and applied.
Description
Technical field
The invention belongs to hot melt adhesive technical field of performance test, be specifically related to method of testing and the device of the hot melt adhesive heat resistance that a kind of science is accurate, feasibility is high, simple to operation.
Background technology
Steel wire mesh frame PE complex pipe is installed the advantages such as more convenient, traceable detection because it has higher compressive resistance, preferably economy, stronger through-current capability, lighter meter Chong, transport, has become the first product of China's reinforced thermoplastics pipeline.The market practice of more than ten years shows: steel wire mesh frame PE compound pipeline complex pipeline, obtaining the successful while, has also exposed problems.Distinct issues are: heat resistance is poor, generally only can be applicable to 40 DEG C of following low temperature fields.The shear resistance of binding resin and steel wire requires to be more than or equal to 13, could use, and proves through a large amount of tests and theoretical research, and the hot melt adhesive that steel wire reinforced composite tube middle layer is used has played conclusive effect to the heat resistance of complex pipe.At present, domestic manufacturer, on the basis of original hot melt adhesive, through modification, has developed the hot melt adhesive having compared with high-temperature resistant performance in succession.
According to " CJ-T189-2007 steel-wire carcass PE tubing and pipe fitting " standard, evaluate at present the most frequently used method of hot melt adhesive heat resistance: use this hot melt adhesive to produce steel-wire carcass reinforced composite pipe for binding resin, this complex pipe is carried out to the hydrostatic test under different temperatures.Test condition is: pressure: 1.2 times of nominal pressures; Time: 165h, if at corresponding temperature, 1.2 times of nominal pressures, after pressurize 165h, tubing does not break, impermeable, illustrate that this tubing can be at this temperature, nominal pressure is with interior long-term use, and clearly, the method cost is high, test period is long, the loaded down with trivial details difficult operation of process, and affect normal Workshop Production, cause manpower, raw-material loss etc.
Summary of the invention
For the above-mentioned problems in the prior art, the object of the present invention is to provide that a kind of science is accurate, feasibility is high, simple to operation and detect method of testing and the device of hot melt adhesive heat resistance fast.
The method of testing of described a kind of hot melt adhesive heat resistance, is characterized in that comprising the steps:
1) related instrument comprises compression molding instrument, cupping machine, makes fixture and the blob of viscose stationary fixture for fixing blob of viscose for making the blob of viscose of the blob of viscose that is coated with steel wire;
2) steel wire being placed on to blob of viscose makes in the groove of train wheel bridge of fixture, edge, train wheel bridge both sides is stretched out at steel wire two ends, cover again at the lower plate mating with train wheel bridge and cover, on the mounting hole of the erection bolt insertion lower plate on train wheel bridge, connect and obtain blob of viscose making fixture, this blob of viscose is made to fixture and put into compression molding instrument, make fixture inner cavity toward blob of viscose and put into colloidal solid and vulcanize, the blob of viscose that obtains being coated with steel wire is for subsequent use, and colloidal solid is binding resin;
3) by step 2) make the blob of viscose that is coated with steel wire be put in blob of viscose stationary fixture, steel wire embeds respectively in corresponding groove, again web member one end of blob of viscose stationary fixture is fixed on the lower gripper of cupping machine, the steel wire of the other end relative with the web member of blob of viscose stationary fixture is connected on the upper clamper of cupping machine, under same stretch speed, be drawn out blob of viscose power used to testing respectively steel wire at different temperature;
4) according to the pulling force measured, calculate corresponding shear resistance, compared with the shear resistance of standard, draw this thermosol heat resistance result at this section of temperature.
The method of testing of described a kind of hot melt adhesive heat resistance, is characterized in that described blob of viscose is made fixture all identical with size, shape and the inner chamber size of blob of viscose stationary fixture, is of a size of 90mm × 50mm × 20mm.
The method of testing of described a kind of hot melt adhesive heat resistance, is characterized in that described steel wire diameter is 1.0mm.
The method of testing of described a kind of hot melt adhesive heat resistance, it is characterized in that step 2) described steel wire two ends stretch out respectively the edge, both sides of train wheel bridge, and one end steel wire length being connected with the upper clamper of cupping machine is greater than the distance between train wheel bridge and upper clamper.
The method of testing of described a kind of hot melt adhesive heat resistance, it is characterized in that step 2) conditions of vulcanization is: curing temperature is 230 DEG C, cure time 50-70min, the dull and stereotyped pressure of vulcanizer is 15MPa, within in sulfidation each 15 minutes, carry out an exhaust, after sulfuration finishes, after naturally cooling 1h, from mould, take out sample.
The method of testing of described a kind of hot melt adhesive heat resistance, is characterized in that the temperature described in step 3) is 20-100 DEG C, and draw speed is 190-210mm/min.
The method of testing of described a kind of hot melt adhesive heat resistance, is characterized in that the cupping machine operation steps described in step 3) is as follows: set test temperature, puller system zeroing; Again the web member of blob of viscose stationary fixture is connected on the lower gripper of cupping machine, with its in opposite directions the steel wire of one end be connected on the upper clamper of cupping machine, cut the unnecessary steel wire in two ends, attached glue on cleaning steel wire, machine and make clamper increase, until steel wire is extracted out, record peak load.
The method of testing fixture used of described a kind of hot melt adhesive heat resistance, is characterized in that comprising blob of viscose making fixture and blob of viscose stationary fixture.
The method of testing fixture used of described a kind of hot melt adhesive heat resistance, it is characterized in that described blob of viscose making fixture comprises the train wheel bridge and the lower plate that are square shape structure, the one side that train wheel bridge coordinates with lower plate is provided for installing the groove of steel wire, four jiaos of train wheel bridges arrange respectively erection bolt, and four jiaos of correspondences of lower plate are symmetrical arranged mounting hole.
The method of testing fixture used of described a kind of hot melt adhesive heat resistance, it is characterized in that described blob of viscose stationary fixture comprises square shape chuck body, in described chuck body, be provided for installing the groove of steel wire, one side with groove in chuck body arranges web member, by this web member, this fixture is connected on cupping machine, in chuck body, with the fixture being equipped with vertical both sides, groove limit for fixing blob of viscose, described fixture is connected in chuck body by set bolt.
By adopting above-mentioned technology, compared with prior art, beneficial effect of the present invention is as follows:
The invention discloses a kind of novel hot melt adhesive heat resistance evaluation method and the method device used, this apparatus structure is simple, easy to operate, those of ordinary skill operation, by using compression molding instrument, cupping machine, for making that the blob of viscose of the blob of viscose that is coated with steel wire is made fixture and for equipment such as the blob of viscose stationary fixtures of fixing blob of viscose, detect the required power of steel wire pull-out blob of viscose under relevant temperature, again according to corresponding computing formula, can calculate the shear resistance at this temperature, the shear resistance of the shear resistance at this temperature and binding resin and steel wire is required to be more than or equal to compared with 13 standard, the heat resistance of this hot melt adhesive at this temperature can significantly be judged, whether be applicable to use at this temperature.The method science is accurate, feasibility is high, simple to operation, the anti-corrosion performance that shows hot melt adhesive that acquired results can objective image, fill up a blank, increased a very valuable test method for the appraisement system of the heat resistance of domestic hot melt adhesive, be suitable for applying.
Brief description of the drawings
Fig. 1 is that blob of viscose of the present invention is made clamp structure schematic diagram;
Fig. 2 is the front view structural representation of Fig. 1 of the present invention;
Fig. 3 is blob of viscose fixing jig structure schematic diagram of the present invention.
1-train wheel bridge in figure, 2-lower plate, 3-groove, 4-erection bolt, 5-blob of viscose is made fixture inner cavity, 6-mounting hole, 7-web member, 8-mounting groove, 9-chuck body, 10-fixture, 11-set bolt.
Embodiment
Below in conjunction with Figure of description, the invention will be further described:
As Figure 1-3, a kind of method of testing of hot melt adhesive heat resistance, comprises the steps:
1) related instrument comprises compression molding instrument (Huzhou is along power rubber manufacturing machinery company limited), cupping machine (testing equipment company limited is surveyed in Shenzhen ten thousand), makes fixture and the blob of viscose stationary fixture for fixing blob of viscose for making the blob of viscose of the blob of viscose that is coated with steel wire;
As shown in Figure 1-2, described blob of viscose is made fixture and is comprised the train wheel bridge 1 and the lower plate 2 that are square shape structure, the one side that train wheel bridge 1 coordinates with lower plate 2 is provided for installing the groove 3 of steel wire, 1 four jiaos of train wheel bridges arrange respectively erection bolt 4, four jiaos of correspondences of lower plate 2 are symmetrical arranged mounting hole 6, are inserted and in mounting hole 6, are obtained blob of viscose and make fixture by erection bolt 4;
As shown in Figure 3, described blob of viscose stationary fixture comprises square shape chuck body 9, in described chuck body 9, be provided for installing the mounting groove 8 of steel wire, in chuck body 9, with one side of mounting groove 8, web member 7 is set, by this web member 7, this fixture is connected on cupping machine, in chuck body 9, with the fixture 10 being equipped with vertical both sides, mounting groove 8 limits for fixing blob of viscose, described fixture 10 is connected in chuck body 9 by set bolt 11;
It is all identical with size, shape and the inner chamber size of blob of viscose stationary fixture that blob of viscose is made fixture, is of a size of 90mm*50mm*20mm;
2) steel wire that is 1.0mm by diameter is placed on blob of viscose and makes in the groove 3 of train wheel bridge 1 of fixture, train wheel bridge 1 edge, both sides is stretched out at steel wire two ends, wherein reserve certain length on one side, should be fit into after blob of viscose stationary fixture at it, web member 7 is fixed on lower gripper, the length that copper cash reserves at least equals the distance between train wheel bridge 1 edge and the upper clamper of cupping machine, cover again at the lower plate 2 mating with train wheel bridge 1 and cover, erection bolt 4 on train wheel bridge 1 inserts to connect on the mounting hole 6 of lower plate 2 and obtains blob of viscose and make fixture, this blob of viscose is made to fixture and put into compression molding instrument, putting into colloidal solid toward blob of viscose making fixture inner cavity 5 vulcanizes, the blob of viscose that obtains being coated with steel wire is for subsequent use,
3) by step 2) make the blob of viscose that is coated with steel wire be put in blob of viscose stationary fixture, steel wire embeds respectively in corresponding groove, again web member one end of blob of viscose stationary fixture is fixed on the lower gripper of cupping machine, the steel wire of the other end relative with the web member of blob of viscose stationary fixture is connected on the upper clamper of cupping machine, under same stretch speed, be drawn out blob of viscose power used to testing respectively steel wire at different temperature; Described temperature is 20-100 DEG C, and draw speed is 190-210mm/min, is preferably 200mm/min;
Described cupping machine operation steps is as follows: set test temperature, puller system zeroing; Again the web member of blob of viscose stationary fixture 7 is connected on the lower gripper of cupping machine, with its in opposite directions the steel wire of one end be connected on the upper clamper of cupping machine, cut the unnecessary steel wire in two ends, machine make clamper rise, until steel wire is extracted out, record peak load.
3) according to the pulling force measured, calculate corresponding shear resistance, compared with the standard that requires (being more than or equal to 13MPa) with hot melt adhesive shear resistance, draw this thermosol heat resistance result at this section of temperature.
The hot melt adhesive of having used common hot melt adhesive and modification in embodiments of the invention is according to the method for blob of viscose that is coated with steel wire, respectively the hot melt adhesive of common hot melt adhesive and modification is made to the common blob of viscose (being called for short hot melt adhesive I) that is coated with accordingly steel wire and the heat-resisting blob of viscose (being called for short hot melt adhesive II) that is coated with steel wire, record respectively 20 by method of testing of the present invention again, 30, 40, 50, 60, 70, 80, 90, strong pulling force at 100 DEG C, according to the computing formula of the shear resistance of binding resin and steel wire bonding interface, calculate corresponding shear resistance, be shown in Table 1.
The computing formula of the shear resistance of bonding interface: σ=F/(3014 × d × t)
Wherein: σ--the shear resistance of binding resin and steel wire bonding interface, unit is MPa;
F--maximum pull, unit is ox;
D--steel wire diameter, unit is millimeter;
The interface length of t--steel wire and binding resin, unit is millimeter.
Common glue and the shear resistance of heat-resistant adhesive under different temperatures that table 1 records for the present invention
As shown in table 1, hot melt adhesive I is the hot melt adhesive that on existing market, steel wire tube generally uses, this glue shear resistance in the time of 40 DEG C is 11.8 MPa, 40 DEG C of above equal < 10MPa of its shear resistance, require (being more than or equal to 13MPa) according to hot melt adhesive shear resistance, can draw, the maximum temperature that this glue heat resistance can bear is 40 DEG C; Hot melt adhesive II is on the basis of hot melt adhesive I, obtain having compared with high temperature tolerance hot melt adhesive through modification, the shear resistance of modified hot melt adhesive in 80 DEG C time is for all higher than 13MPa, can tentatively judge that the long-term serviceability temperature of this type hot melt adhesive is 80 DEG C, according to the data of this test gained, can save 80 DEG C of following each temperature sections of this hot melt adhesive and adopt respectively a large amount of loaded down with trivial details tests of the hydrostatic test heat resistance of tubing.
According to method of testing of the present invention, can clearly analyze the upper limit temperature of heat tolerance of blob of viscose, compared with prior art, it is easy and simple to handle, cost is low, accuracy is high, is suitable for applying.
Claims (10)
1. a method of testing for hot melt adhesive heat resistance, is characterized in that comprising the steps:
1) related instrument comprises compression molding instrument, cupping machine, makes fixture and the blob of viscose stationary fixture for fixing blob of viscose for making the blob of viscose of the blob of viscose that is coated with steel wire;
2) steel wire being placed on to blob of viscose makes in the groove (3) of train wheel bridge (1) of fixture, train wheel bridge (1) edge, both sides is stretched out at steel wire two ends, cover again at the lower plate (2) mating with train wheel bridge (1) and cover, the upper connection of mounting hole (6) that erection bolt (4) on train wheel bridge (1) inserts lower plate (2) obtains blob of viscose making fixture, this blob of viscose is made to fixture and put into compression molding instrument, make fixture inner cavity (5) toward blob of viscose and put into colloidal solid and vulcanize, the blob of viscose that obtains being coated with steel wire is for subsequent use;
By step 2) make the blob of viscose that is coated with steel wire be put in blob of viscose stationary fixture, steel wire embeds respectively in corresponding groove, again web member one end of blob of viscose stationary fixture is fixed on the lower gripper of cupping machine, the steel wire of the other end relative with the web member of blob of viscose stationary fixture is connected on the upper clamper of cupping machine, under same stretch speed, be drawn out blob of viscose power used to testing respectively steel wire at different temperature;
4) according to the pulling force measured, calculate corresponding shear resistance, compared with the shear resistance of standard, draw this thermosol heat resistance result at this section of temperature.
2. the method for testing of a kind of hot melt adhesive heat resistance according to claim 1, is characterized in that described blob of viscose is made fixture all identical with size, shape and the inner chamber size of blob of viscose stationary fixture, is of a size of 90mm*50mm*20mm.
3. the method for testing of a kind of hot melt adhesive heat resistance according to claim 1, is characterized in that described steel wire diameter is 1.0mm.
4. the method for testing of a kind of hot melt adhesive heat resistance according to claim 1, it is characterized in that step 2) described steel wire two ends stretch out respectively the edge, both sides of train wheel bridge (1), and one end steel wire length being connected with the upper clamper of cupping machine is greater than the distance between train wheel bridge (1) and upper clamper.
5. the method for testing of a kind of hot melt adhesive heat resistance according to claim 1, it is characterized in that step 2) in conditions of vulcanization be: curing temperature is 230 DEG C, cure time 50-70min, the dull and stereotyped pressure of vulcanizer is 15MPa, in sulfidation, carried out an exhaust every 15 minutes, after sulfuration finishes, after naturally cooling 1h, from mould, take out sample.
6. the method for testing of a kind of hot melt adhesive heat resistance according to claim 1, is characterized in that the temperature described in step 3) is 20-100 DEG C, and draw speed is 190-210mm/min.
7. the method for testing of a kind of hot melt adhesive heat resistance according to claim 1, is characterized in that the cupping machine operation steps described in step 3) is as follows: set test temperature, puller system zeroing; Again the web member of blob of viscose stationary fixture (7) is connected on the lower gripper of cupping machine, with its in opposite directions the steel wire of one end be connected on the upper clamper of cupping machine, cut the unnecessary steel wire in two ends, attached glue on cleaning steel wire, machine and make clamper increase, until steel wire is extracted out, record peak load.
8. the method for testing of a hot melt adhesive heat resistance fixture used, is characterized in that comprising blob of viscose making fixture and blob of viscose stationary fixture.
9. the method for testing of a kind of hot melt adhesive heat resistance according to claim 8 fixture used, it is characterized in that described blob of viscose making fixture comprises the train wheel bridge (1) and the lower plate (2) that are square shape structure, the one side that train wheel bridge (1) coordinates with lower plate (3) is provided for installing the groove (3) of steel wire, (1) four jiao of train wheel bridge arranges respectively erection bolt (4), and four jiaos of correspondences of lower plate (2) are symmetrical arranged mounting hole (6).
10. the method for testing of a kind of hot melt adhesive heat resistance according to claim 8 fixture used, it is characterized in that described blob of viscose stationary fixture comprises square shape chuck body (9), in described chuck body (9), be provided for installing the mounting groove (8) of steel wire, one side of chuck body (9) upper band mounting groove (8) arranges web member (7), by this web member (7), this fixture is connected on cupping machine, the upper both sides vertical with band mounting groove (8) limit of chuck body (9) are equipped with the fixture (10) for fixing blob of viscose, described fixture (10) is connected in chuck body (9) by set bolt (11).
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| CN108716968A (en) * | 2018-05-22 | 2018-10-30 | 浙江中特化工有限公司 | A kind of test device and its test method of test hot melt adhesive air-tightness |
| CN110736699A (en) * | 2019-09-11 | 2020-01-31 | 临海伟星新型建材有限公司 | Device for testing binding force between plastic part and metal insert and testing method thereof |
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| CN110736699A (en) * | 2019-09-11 | 2020-01-31 | 临海伟星新型建材有限公司 | Device for testing binding force between plastic part and metal insert and testing method thereof |
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| CN104111199B (en) | 2016-06-29 |
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