CN102250559B - Method for preparing masking material for spraying - Google Patents
Method for preparing masking material for spraying Download PDFInfo
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- CN102250559B CN102250559B CN 201110137717 CN201110137717A CN102250559B CN 102250559 B CN102250559 B CN 102250559B CN 201110137717 CN201110137717 CN 201110137717 CN 201110137717 A CN201110137717 A CN 201110137717A CN 102250559 B CN102250559 B CN 102250559B
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Abstract
The invention provides a method for preparing a masking material for spraying. The method provided by the invention comprises four main steps of: step 1, preparing material; step 2, carrying out surface treatment; step 3, sticking a double-faced adhesive tape; and step 4, blanking and molding. A contact angle between a side circumferential surface of the cylindrical masking material prepared withthe method and water is in a range of 80-95 DEG; when the masking material is used, a mould joint surface between a flowing material and the masking material is smooth and flat after the flowing material such as coating and the like forms a coating film, and the masking material is stripped, so that a wave-shaped rough structure is not formed on the mould joint surface after the common adhesive tape is stripped, and the phenomenon that the edge of the coating film is rough and uneven can be inhibited to ensure that the whole coating film is uniform and flat. The method provided by the invention has simplicity for manufacturing, is economical and practical and has a better practical value and a wide application prospect in the field of a surface treatment technology for materials.
Description
Technical field
The present invention relates to a kind of preparation method of masking material for spraying, this masking material is when the surface treatments such as spraying, uses when hiding non-application position, belongs to the surface treatment technology of material field.
Background technology
In the surface treatments such as modern application, for protection does not need part to be processed, often adopt the materials such as newspaper or adhesive tape to cover protection.In this way, it is poor to cover protection effect, and being coated with film edge needs following process, greatly reduces whole working efficiency.
For example when aircraft skin surface spraying coating, should not implement application on every side at position or threaded hole that parts are installed, therefore need masking material that non-application position is protected, as shown in Figure 4.
In processing mode in the past, usually adopt adhesive tape to cover to non-application position.Adopt this mode to protect, this position of energy basic guarantee is not by coating pollution.But have following problem: behind paint solidification, because adhesive tape and paint solidification are integrated, adhesive tape is relatively more difficult with separating of coating, even may cause the marginal laceration of filming; And after peeling off, the joint face of adhesive tape and coating is generally undulatory coarse structure, and the surrounding edge of filming is more coarse; Because adhesive tape and base plate are the capillary difference that differing materials causes, cause the pattern that is coated with the convex-concave inequality that the film edge appearance do not expect after the adhesive tape protection, make filming of application position smooth not, filming thickness difference occurs.The like this appearance of problem will reduce whole attractive in appearance and result of use of filming, and causing filming needs following process, reduces whole production efficiency.
Summary of the invention
1, purpose: purpose of the present invention is exactly for a kind of preparation method of masking material for spraying is provided, when covering do not need to be coated with regional with this masking material, the joint face that non-application position periphery is filmed is smooth smooth, and the generation of the edge-coating shape convex-concave uneven phenomenon that can suppress to film.
2, technical scheme: the preparation method of a kind of masking material for spraying of the present invention, make flow process as shown in Figure 1, the method concrete steps are as follows:
Step 1: get the raw materials ready.
Before making masking material, need to prepare following material:
(A) with Low Density Polyethylene (LDPE) sheet material as base material; The physical dimension of this sheet material is selected according to actual process requirements, sheet thickness generally below 2mm, the surface to the contact angle of water between 70 °～110 °.
(B) 360～600 order waterproof abrasive papers, double faced adhesive tape;
(C) acetone or toluene solution, PE surfactant.
Step 2: surface treatment
At first with acetone or toluene solution the upper surface of polyethylene sheets is carried out alligatoring and skimming treatment, again upper surface is cleaned and dries, utilize at last the PE surfactant to carry out activation treatment.
The purpose of this step is by polyethylene surface being processed, increased its surface energy, strengthens itself and double faced adhesive tape cohesive force.
Step 3: paste double faced adhesive tape
The polyethylene sheets through after the surface treatment that step 2 is obtained lies on the horizontal operation face, wherein treated side up, be that 15 ℃～38 ℃, humidity are in 30%～60% the situation in temperature, the double faced adhesive tape glue-line is fitted on the treated side of polyethylene sheets, after Ying Yiyi end was fitted first, the slow the other end that is depressed into again was to reduce the probability of Bubble formation, then impose the pressure of about 0.1MPa with cylinder or other modes, make it that effective adhesive be arranged.
Step 4: stamping-out moulding
The polyethylene sheets with double faced adhesive tape that step 3 is obtained is placed on the Drilling machines bench, wherein be stained with the surface of double faced adhesive tape up, then utilize circular stamping knife to pass through clamp, start drilling machine, utilize manually to make fast downward die-cut sheet material of circular stamping knife, obtain the cylindrical masking material of side periphery roughness between Ra1.6um～6.3um.
The purpose of this step just guarantees the roughness of masking material side periphery.The wettability of solid material surface is determined jointly by its chemical constitution and micro-geometry, under the prerequisite that the polyethylene chemical constitution has been determined, the roughness of side periphery in pre-determined range, the two just guaranteed masking material side periphery to the contact angle of water between 80 °～95 °.
Wherein, the described low density polyethylene sheet material of step 1 requires contact angle to water between 70 °～110 °, refers to by the contact angle tester different low density polyethylene sheet materials be tested, and selects the material that meets the demands.
Wherein, step 2 is described with upper surface alligatoring and the skimming treatment to polyethylene sheets of acetone or toluene solution, its specific implementation process is: at first utilize 360～600 order waterproof abrasive papers that grinding process is carried out on the polyethylene sheets surface, with acetone or toluene solution polyethylene sheets is carried out wiping behind polishing 3min～5min, carry out skimming treatment.
Wherein, step 2 is described cleans and drying and processing upper surface, its specific implementation process is: wash at least 3min with the room temperature tap water that flows, again with distilled water or washed with de-ionized water 3～6 times, then at 30 °～60 ° dry 30min～60min in convection oven.
Wherein, the described PE surfactant that utilizes at last of step 2 carries out activation treatment, its specific implementation process is: utilize the instruments such as brush, under 15 °～25 ° envrionment temperature, surfactant to treated surface coated a layer thickness is 5um～15um carries out next step operation through after 12s～25s drying.This PE surfactant refers to use the liquid material that deals with the bonding carrier surfaces such as plastics in order to improve adhesiveproperties, generally the surface treatment agent of the models such as Mei Taibang 770 commonly used, happy Thailand 770 and 3M94.
Wherein, the described double faced adhesive tape that pastes of step 3, this layers of two-sided thickness range is generally between 0mm～0.2mm.
Wherein, the described roughness that obtains the side periphery at the drilling machine Blanking Shaping of step 4 is the cylindrical masking material between Ra1.6um～6.3um, and the diameter of this cylindrical masking material is generally decided according to the needs that cover at application position, and thickness is between 0～2mm.This drilling machine rotating speed generally is selected between 800r/min～1800r/min.
Wherein, the described circular stamping knife of step 4 is the rapid steel material, and the hardness of this stamping knife is between HRC50～70, and the diameter of stamping knife is identical with the diameter of cylindrical masking material.
3, advantage and effect: masking material of spraying usefulness of the present invention and preparation method thereof advantage is:
1) this masking material and film adhesive are little, and it is smooth smooth to guarantee to peel off rear joint face, and simultaneously inhibition is filmed and is coated with the generation of the uneven pattern of shape convex-concave.
2) this masking material is drawn materials conveniently, and the preparation method is simpler.
Description of drawings
Fig. 1 is FB(flow block) of the present invention
Fig. 2 is the schematic perspective view of an embodiment of the present invention
Fig. 3 is the front view of an embodiment of the present invention
Fig. 4 is the schematic perspective view of spraying forepiece
Fig. 5 is the synoptic diagram of spraying state
Fig. 6 is the schematic perspective view that masking material is peeled off state after the expression application
Nomenclature
1 masking material, 11 double faced adhesive tape glue-lines
12 double faced adhesive tape separate-type paper, 2 application panels
3 non-application positions, 4 screw holes
5 spray gun F joint faces
B is coated with film edge
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The preparation method of a kind of masking material for spraying of the present invention, referring to shown in Figure 1, the method concrete steps are as follows:
Step 1: get the raw materials ready.
Before making masking material, need to prepare following material:
(A) with Low Density Polyethylene (LDPE) sheet material as base material; The physical dimension of this sheet material is selected according to actual process requirements, sheet thickness generally below 2mm, the surface to the contact angle of water between 70 °～110 °.
(B) 360～600 order waterproof abrasive papers
(C) acetone or toluene solution, Mei Taibang 770 surface treatment agents
(D) 3M double faced adhesive tape, material requirements: bonding low-surface-energy material better performances, bondline thickness is no more than 0.2mm
Step 2: surface treatment
(A) at first utilize 360～600 order sand paper that the polyethylene sheets upper surface is carried out roughening treatment, with acetone or toluene solution polyethylene sheets is carried out wiping behind polishing 3min～5min, carry out skimming treatment;
(B) alligatoring that step (A) is made and the polyethylene sheets after the degreasing wash at least 3min with the room temperature tap water that flows, again with distilled water or washed with de-ionized water 3～6 times, then at 30 °～60 ° dry 30min～60min in convection oven;
(C) polyethylene sheets that step (B) is made carries out surface activation process:
Plan is at polyethylene sheets surface coated H=5um～15um=(5～15) * 10
-6The surfactant of m, the length of setting polyethylene sheets is L=1m, wide W=0.5m, thickness T=1mm.
Polyethylene surface area S=L * W=1 * 0.5=0.5m
2
The volume of surfactant is V=S * H=0.5 * (5～15) * 10
-6=2.5ml～7.5ml
Under 15 °～25 ° temperature, Mei Taibang 770 surface treatment agents in that polyethylene surface is toppled over about 2.5ml～7.5ml utilize brush that treatment agent is uniformly coated on the surface.Carrying out next step operation through after 12s～25s drying;
The purpose of this step is by polyethylene surface being processed, increased its surface energy, strengthens itself and double faced adhesive tape cohesive force.
Step 3: paste double faced adhesive tape
The surface treated polyethylene sheets that step 2 is obtained lies on the horizontal operation face, wherein treated side up, be that 15 ℃～38 ℃, humidity are in 30%～60% the situation in temperature, the double faced adhesive tape glue-line is fitted on the treated side of polyethylene sheets, after Ying Yiyi end was fitted first, the slow the other end that is depressed into again was to reduce the probability of Bubble formation, then impose the pressure of about 0.1MPa with cylinder or other modes, make it that effective adhesive be arranged.
Step 4: stamping-out moulding
The polyethylene sheets with double faced adhesive tape that step 3 is obtained is placed on the Drilling machines bench, wherein be stained with the surface of double faced adhesive tape up, be Φ 12mm with utilizing diameter, material is rapid steel, hardness is the stamping knife between HRC50～70, pass through clamp, drill press spindle rotarily drives the rotation of stamping knife, the drilling machine rotating speed is selected in 1500r/min, utilize and manually make fast downward die-cut sheet material of stamping knife, obtaining diameter is Φ 12mm, the tubular masking material 1 of side periphery roughness between Ra1.6um～6.3um, Fig. 2 is the schematic perspective view of masking material, Fig. 3 is its front view, wherein 11 is the double faced adhesive tape glue-line of the bonding on the cylindrical masking material upper base disc, and 12 is the double faced adhesive tape separate-type paper.
The purpose of this step just guarantees the roughness of masking material side periphery.The wettability of solid material surface is determined jointly by its chemical constitution and micro-geometry, under the prerequisite that the polyethylene chemical constitution has been determined, the roughness of side periphery in specified range, the two just guaranteed masking material side periphery to the contact angle of water between 80 °～95 °.
Masking material 1 of the present invention pastes on the non-application position 3 of as shown in Figure 4 application panel 2 coated surfaces, and protection screw hole 4 is not by coating pollution.After peeling off double faced adhesive tape separate-type paper 12, be bonded on the non-application position 3 through double faced adhesive tape glue-line 11.Then as shown in Figure 5, utilize 5 pairs of coated surfaces of spray gun to spray, and after spraying, the processing such as heat to filming, impel the curing of coating.After paint solidification, as shown in Figure 6, utilize hand or instrument directly to peel off masking material 1.
As previously mentioned, after this masking material 1 is peeled off, because of side periphery and the adhesive power of filming lower, the joint face F at non-application position 3 is roughly smooth smooth, undulatory Rough Horizontal Plane can not appear, simultaneously be coated with the pattern that the convex-concave inequality does not appear in film edge B around the non-application position 3, guaranteed the whole concordant polishing of filming.
Take polyethylene as base material, the 3M double faced adhesive tape is that binding agent is made masking material.
Step 1: get the raw materials ready.
Before making masking material, need to prepare following material:
(A) thickness is Low Density Polyethylene (LDPE) sheet material of 1mm, and its contact angle to water is 74 °.
(B) 400 order waterproof abrasive papers
(C) acetone soln, Mei Taibang 770 surface treatment agents
(D) 3M double faced adhesive tape 9495LE, its bondline thickness are 0.16mm
Step 2: surface treatment
(A) at first utilize 400 order sand paper that the polyethylene sheets upper surface is carried out roughening treatment, with acetone soln the polyethylene sheets upper surface is carried out wiping behind the polishing 4min, carry out skimming treatment;
(B) alligatoring that step (A) is made and the polyethylene sheets upper surface after the degreasing are used washed with de-ionized water 5 times, then at 38 ° of dry 50min in convection oven again with the mobile tap water flushing of room temperature 3min;
The upper surface of the polyethylene sheets that (C) step (B) is made carries out surface activation process:
Plan is in polyethylene sheets surface coated H=10um=10 * 10
-6The surfactant of m, the length of polyethylene sheets are L=1m, wide W=0.5m, thickness T=1mm.
Polyethylene surface area S=L * W=1 * 0.5=0.5m
2
The volume of surfactant is V=S * H=0.5 * 10 * 10
-6=5ml
Be in 20 ° of situations in temperature, Mei Taibang 770 surface treatment agents in that polyethylene surface is toppled over about 5ml utilize brush that treatment agent is uniformly coated on the surface.After through the 20s drying, carry out next step operation;
Step 3: paste double faced adhesive tape
The polyethylene sheets through after the surface treatment that step 2 is obtained lies on the horizontal operation face, its treated side up, be that 20 ℃, humidity are in 41% the situation in temperature, the double faced adhesive tape glue-line is fitted on the treated side of polyethylene sheets, after Ying Yiyi end is fitted first, the slow the other end that is depressed into again, to reduce the probability of Bubble formation, then with cylinder roll extrusion on the double faced adhesive tape separate-type paper, impose the pressure of about 0.1MPa, make itself and polyethylene surface that effective adhesive be arranged.
Step 4: stamping-out moulding
The polyethylene sheets that is stained with double faced adhesive tape that step 3 is obtained is placed on the Drilling machines bench, wherein be stained with the surface of double faced adhesive tape up, be that Φ 12mm, material are rapid steel with diameter, hardness is that the circular stamping knife of HRC65 clamps at drilling machine, drill press spindle rotarily drives the rotation of circular stamping knife, the drilling machine rotating speed is 1500r/min, utilize manually to make fast downward die-cut sheet material of circular stamping knife, obtain diameter of phi 12mm, highly be that 1.16mm, side periphery roughness are the masking material 1 of the cylindrical shape of Ra3.2um.
Claims (7)
1. the preparation method of a masking material for spraying, it is characterized in that: the method concrete steps are as follows:
Step 1: get the raw materials ready
Before making masking material, need to prepare following material:
1) be that the LDPE sheet material is as base material with Low Density Polyethylene; The physical dimension of this sheet material is selected according to actual process requirements, thickness below 2mm, the surface to the contact angle of water between 70 °～110 °;
2) 360～600 order waterproof abrasive papers, double faced adhesive tape;
3) acetone or toluene solution, PE surfactant;
Step 2: surface treatment
At first with acetone or toluene solution the upper surface of polyethylene sheets is carried out alligatoring and skimming treatment, again upper surface is cleaned and dries, utilize at last the PE surfactant to carry out activation treatment; The purpose of this step is by polyethylene surface being processed, increased its surface energy, strengthens itself and double faced adhesive tape cohesive force;
Step 3: paste double faced adhesive tape
The polyethylene sheets through after the surface treatment that step 2 is obtained lies on the horizontal operation face, wherein treated side up, be that 15 ℃～38 ℃, humidity are in 30%～60% the situation in temperature, the double faced adhesive tape glue-line is fitted on the treated side of polyethylene sheets, after Ying Yiyi end was fitted first, the slow the other end that is depressed into again was to reduce the probability of Bubble formation, then impose the pressure of 0.1MPa in the cylinder mode, make it that effective adhesive be arranged;
Step 4: stamping-out moulding
The polyethylene sheets with double faced adhesive tape that step 3 is obtained is placed on the Drilling machines bench, wherein be stained with the surface of double faced adhesive tape up, then utilize circular stamping knife to pass through clamp, start drilling machine, utilize manually to make fast downward die-cut sheet material of circular stamping knife, obtain the cylindrical masking material of side periphery roughness between Ra1.6um～6.3um; The purpose of this step be guarantee the roughness of masking material side periphery and masking material side periphery to the contact angle of water between 80 °～95 °;
Wherein, step 2 is described carries out alligatoring and skimming treatment with acetone or toluene solution to the upper surface of polyethylene sheets, its specific implementation process is: at first utilize 360～600 order waterproof abrasive papers that grinding process is carried out on the polyethylene sheets surface, with acetone or toluene solution polyethylene sheets is carried out wiping behind polishing 3min～5min, carry out skimming treatment;
Step 2 is described cleans and dries upper surface, its specific implementation process is: wash at least 3min with the mobile tap water of room temperature, again with distilled water or washed with de-ionized water 3～6 times, then at 30 °～60 ° C dry 30min～60min in convection oven;
The described PE surfactant that utilizes at last of step 2 carries out activation treatment, its specific implementation process is: utilize brush tool, under the envrionment temperature of 15 °～25 ° of C, surfactant to treated surface coated a layer thickness is 5um～15um carries out next step operation through after 12s～25s drying.
2. the preparation method of a kind of masking material for spraying according to claim 1, it is characterized in that: its surface of the described low density polyethylene sheet material of step 1, refers to by the contact angle tester different low density polyethylene sheet materials be tested and selects the material that meets the demands between 70 °～110 ° the contact angle of water.
3. the preparation method of a kind of masking material for spraying according to claim 1, it is characterized in that: described this PE surfactant of step 2 refers in order to improve adhesiveproperties, with the liquid material that deals with the plastic bonding carrier surface, they are Mei Taibang 770, happy Thailand 770 and 3M94.
4. the preparation method of a kind of masking material for spraying according to claim 1, it is characterized in that: the described double faced adhesive tape that pastes of step 3, this layers of two-sided thickness is below 0.2mm.
5. the preparation method of a kind of masking material for spraying according to claim 1, it is characterized in that: step 4 is described to obtain the cylindrical masking material of side periphery roughness between Ra1.6um～6.3um at the drilling machine Blanking Shaping, and this drilling machine rotating speed is 800r/min～1800r/min.
6. the preparation method of a kind of masking material for spraying according to claim 1 is characterized in that: described this cylindrical masking material, and its diameter is selected according to application position needs, and thickness is between 0～2mm.
7. the preparation method of a kind of masking material for spraying according to claim 1, it is characterized in that: the described circular stamping knife of step 4 is the rapid steel material, the hardness of this stamping knife is between HRC50～70, and the diameter of stamping knife is identical with the diameter of cylindrical masking material.
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|---|---|---|---|
| CN 201110137717 CN102250559B (en) | 2011-05-25 | 2011-05-25 | Method for preparing masking material for spraying |
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|---|---|---|---|
| CN 201110137717 CN102250559B (en) | 2011-05-25 | 2011-05-25 | Method for preparing masking material for spraying |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111154417B (en) * | 2020-01-19 | 2021-09-03 | 惠州Tcl移动通信有限公司 | Protective film assembly |
| CN111961417A (en) * | 2020-07-07 | 2020-11-20 | 东风汽车底盘系统有限公司 | Wheel spraying finish paint shelters from sticky tape |
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