JPS58501068A - aerosol container - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] aerosol fan spray head Technical field The present invention relates to an aerosol spray head, and particularly relates to an aerosol spray head that uses a soluble nitrogen atomizer. The present invention relates to a spray head utilized for dispensing sticky polymer solutions.

Background technology Application of small volumes of Nistomer adhesive materials is most conveniently applied by aerosol spray. clothed. In many applications, the adhesive has an elliptical or oval shape rather than a circular spray shape. This convenience is enhanced when sprayed in a 7-amp spray format. The reason is that the fan type is dispersed. Creates a more even application across the width of the mold.

Elastomeric polymers (e.g. cross-linked nitri/l/comb, cross-linked Chill rubber, polychloroprene fusion copolymer) can be sprayed using a fan spray head attached. It was sold in an aerosol container. However, sparging is a precipitate that does not occur in solution. sludge problems and soluble polymers have higher adhesion than cross-linked polymers. Because it provides strength and withstands high temperatures well, it can be used to melt elastomers and polymers as opposed to spraying. It is desirable to be able to spray the liquid.

However, until now in the aerosol industry, elastomer adhesive solutions It has not been possible to commercially produce a satisfactory aerosol container filled with Because, A satisfactory spray form can be obtained from aerosols containing more than a few percent of sticky solids in the solution. It was impossible to obtain.

This is due to the fact that the polymer structure of the nystomeric sticky solution has a wide range of chain entanglements. That is, this is because it has high solution viscosity. Generally, the polymer is about 10,000 or more If a solution having an average molecular weight of above and non-Newtonian viscoelastic properties is produced, , it was difficult to spray from the aerosol industry.

For example, a polychloroprene contact adhesive can be dissolved in a solvent such as methylene chloride. , filled into a pressurized aerosol container with a propellant source such as dimethyl ether, When sprayed through an existing fan spray head, rather than rIJtIIJi Unacceptably narrow streamline release occurs at aerosol solids levels of about 4,4 wt. It can be obtained with

Standard 475cm3 4.4% polychloroprene adhesive packaged in aerosol The solution requires about 22 grams of adhesive product, i.e. an area of only about 3.6 m2. Give enough amount to coat the two sides. Consumers mainly pay for the container and check the contents. Such small quantities of the product are not commercially acceptable as it wears out quickly. Will. As a result, soluble adhesive polymers are It has not been successfully sold. Alternatively, these are cross-linked and aerosolized where possible. Cans, tubes, or It is sold in a bottle-like container.

Industrial users of adhesives use airless spray gun equipment to produce soluble adhesive polymers. Although convenience is available, it is too bulky and expensive for individual consumer use.

These airless spray gun devices have an elongated nozzle opening placed in a groove and Spray with a restraint in the material flow path upstream of the nozzle opening similar to that described in using the head. This structure is described in U.S. Patent No. 2,621. (3782,68 5,627,3, [] [10,576, ro, 647,147 and 4. θ97. 000.

However, such airless injection gas/device has a power consumption of 0.17 megapascals. Typically a pressure of 6.9 megapascals or more compared to the nominal aerosol container pressure The teachings of the above-listed patents are to operate at reduced pressure and filled with soluble polymers. Is this structure effective for force-operated aerosol container spray heads? Not shown.

Disclosure of invention Propulsion with adhesive solids level 2.5 times higher than that sprayed by existing spray heads When spraying an elastomeric adhesive polymer in solution with a force source, the present invention provides a uniform A spray head is provided to create a fan spray type.

The spraying head according to the present invention comprises a soluble elastomeric adhesive polymer solution and a relatively Storing the propulsion source at low pressure Special table 1986-501068 (3) (Includes the L1 mandrel inserted into the aerosol container.

the inlet mandrel communicates with the passageway of the outlet tube oriented at substantially 90 degrees to the inlet mandrel; and It intersects the outlet pipe passageway and ends in a groove that forms the nozzle opening, which is elongated from the center. including an entrance passageway. The nozzle opening formed in this way generally has an elliptical cross section. generally centered within the groove and aligned with the groove substantially longer than the secondary axis of the opening. It has a main axis line.

There is a restraining part located between the mandrel and the nozzle opening, which This increases the uniformity of the resulting spray pattern. In one embodiment, the seven restraints are connected to the spray and defining an orifice in communication with the outlet tube. another implementation In examples, the restraint may include an orifice or multiple orifices located within the passageway of the outlet tube. orifices. Yet another embodiment of this restraint is located within the outlet pipe. A rectangular orifice is defined.

Brief description of the drawing The invention will be further described with reference to the accompanying drawings, in which like reference numerals refer to (some of the drawings) FIG. An elevation view of a portion of the sol container; FIG. 2 is a partially cross-sectional elevational view of the spray assembly of FIG. 1; 6 is an end view of the outlet pipe section of the spray head of FIG. 1, FIG. 4(d), line 4-- A partial cross-sectional view taken generally along 4; FIG. 5 shows a second embodiment of a spray head assembly according to the present invention, partially cut away. The elevation view, Figure 6, shows the orifice plate shown in solid lines and the additional orifice plate shown in phantom lines. a partially sectional elevational view of a sixth embodiment of a spray head according to the invention; FIG. 7 is a cross-sectional view taken along ff11.7-7 in FIG. 6; FIG. 8(d) Partially cross-sectional vertical view of a fourth embodiment of a spray head assembly according to the present invention. side view, FIG. 9 shows a jet that does not include any of the restraints taken generally along line 9-9 of FIG. To the mist, the spray head assembly (made by , is the spray type after spraying the plane.

BEST MODE FOR CARRYING OUT THE INVENTION 1 and 2, a conventional aerosol container 1 including a neck portion 3 is shown. and is equipped with a valve 5, one of many types known in the art. Good too. Valve 5 is placed in the bottom of container 1 so that all contents of container 1 are exposed to water. including an infiltration tube (not shown).

A spray head assembly embodying the invention is inserted into the container valve 5 and connected to the spray head assembly. an elongated nozzle opening through which the contents of the container 1 flow to form a spray 15; a nozzle outlet tube 11 having an interconnecting passageway terminating in section 13; No. The spray head 9, best seen in Figure 2, is approximately 100 degrees with respect to the inlet stem 17. including an exit hole 19 oriented at an angle of . The inlet shaft 17 has a metering gap 2 on its lower side. It has a cylindrical wall 21 cut to form 3. The inlet stem 1γ is the spray head When 9 is pressed down, it serves to actuate the container valve 5 and the consumption gap 23 regulates the flow of the contents of the container 1 into the atomizing head 9. The contents of container 1 are The cylindrical inlet passage 25 formed by the cylindrical wall 21 through the gap 23 and the spray head It flows to the main body 27 of the door 9. The passage 25 is a cylinder that intersects and communicates with the exit hole 19. It ends in room 29.

The above structure is conventional and is the most common technical structure. however , the artificial mandrel 17 is placed into a spray head 9 having a container valve 5 and a female inlet. It's okay. Either structure may be used in conjunction with the present invention.

The spray head 9 can be applied to the entire area or from suitable materials including plastic. 2. ) or may be molded, but cost considerations and the ability to withstand chemical attack It is preferably molded from plastic.

1-4 depict a preferred embodiment of the invention, in which orifice 43 is A determining restraint 41 is incorporated between the cylindrical chamber 29 and the outlet hole 190.

The restraint 41 is preferably molded as an integral part of the spray head body 27; It may be glued or welded in place. - The restraint part 41 is a central orifice 43 The orifice is formed as an annular ring defining an internal cross-sectional area of the outlet tube 11. or has a cross-sectional area smaller than any of the cross-sectional areas of the inlet passage 25, and has a nozzle opening. It is approximately equal to the cross-sectional area of the mouth portion 13.

The nozzle outlet pipe 11 is press-fitted into the outlet hole 19 in order to contact the restraint part 41. yen. A cylinder body 45 and a flat tip 47 in which the nozzle opening 13 is formed. including. The outlet tube 11 may be held in the hole 19 by friction and therefore not removed. or may be glued or welded in place. Nozzle opening 1 3 has a cylindrical passage 49 extending centrally through the outlet tube 11 and a transverse tapered groove 5. 1 was used in conjunction with an inlet pipe passageway 25 having a diameter of In this case, 1.0 fin was determined based on experience. Beyond the outlet passage 49, the nozzle opening 13 is a tapered groove 51 having sides 55 and 57 arranged at an enclosing angle of approximately 90 degrees; It is formed by crossing the passage taper 53 in the transverse direction.

Groove 51 intersects outlet passage 53 to a depth substantially equal to the length of taper 53. Ru. The elongated opening 13 thus formed and best visible in FIG. substantially along the groove 51 than in the transverse dimension to the groove 51. Has long dimensions. The preferred opening size is 1.5 mm along the groove 51, and the groove 5 1 in the transverse direction.

Groove sides 55 and 57 form the terminal surfaces of outlet tube 11. The side surfaces of the groove 51 are flat. Local areas 59 and 61.

The shape of the tip portion 4T of the outlet pipe 11 remote from the groove 51 is such that it exits from the nozzle opening 13. It does not affect the shape of the spray 15 and is therefore not critical to the invention. flat local 59 and 61 may be inclined in the opposite direction from the groove 51, for example in a concave or convex manner, or 1 or any arrangement that does not interfere with the spray 15 may be used. However, air enters the groove 51 and is aligned with the spray 15 to promote the dispersion of the spray material. , the groove 51 extends a distance at least substantially greater than the opening length, and preferably It is important that it extends over the entire width of the tip 47.

The outlet passage 49 is preferably shaped with a conical taper 53. The passage 49 ends because it is easy to use, but the passage 49 has a parabolic, hyperbolic, or spherical shape It may end with a reduced cross section of . Described in U.S. Patent No. 4,097,000 The method shown above shows that a reduced section with a parabola on the side section and an ellipse on the cross section is convenient. It will be. However, these shapes are somewhat difficult to mold, and as shown in the example Very satisfactory results are obtained if the reduced section is conical in side section. .

FIG. 5 shows the present invention including a spray head 5 identical to the spray head 9 illustrated in FIG. A second embodiment of the spray assembly 63 is shown in FIG. The outlet pipe 67 includes an outlet chamber 69. The outlet chamber is modified to meet a constraint 73 defining an orifice 74. From the end 71 of the outlet pipe 67 to the outlet chamber 69 and the same size and size as the nozzle opening in FIG. and an outlet passageway 75 that communicates with a nozzle opening 77 shaped like a.

A diameter of 1.9 mm used in conjunction with an exit passageway 75 having a diameter of 1.5 mm and a length of 2 mm. , an outlet chamber 69 having a length of 12.7 gi+ is provided by the spray head assembly 7 of FIG. It has been found that it is possible to produce a uniform and satisfactory fan spray mold almost identical to that produced by I was taken out.

FIG. 6 shows a further atomizing head assembly 790 in accordance with the present invention including: atomizing head 81f; represents an embodiment in which the spray head has a restraint instead of the restraint 41 or 73. Since the section is inserted into the spray head 81, it simply limits the stroke of the outlet tube 850. is generally similar to spray heads 9 and 65 described above, except with an annular shoulder. It is the same. The outlet pipe 85 includes an outlet chamber 87, an outlet passage 89, a nozzle opening 91, These increase the length of the outlet tube 85, thereby making the outlet chamber 81 22.1 mm long. Other than housing, the outlet chamber 69, outlet passageway 75, and outlet passageway 75 of the spray head assembly 63 of FIG. and nozzle opening 77 in all respects. centered along the length of outlet tube 87 , an annular plate defining an outlet passageway 89 and an orifice 95 coaxial with the nozzle opening 91; There is a restraining portion 93 formed by. The restraining plate 93 is preferably similar to the outlet pipe 85. The sea urchin is made of plastic, and either press fit or adhesive bonding or welding is used. is fixed in the outlet chamber 87 by. Appropriate for restraint plate 93 and orifice 95 The dimensions were found to be 1 mm in width and 1.25 gm in diameter, respectively.

Particularly when spraying viscous solutions, one or more restraint plates 93 may be provided within the outlet chamber 87. It was found that the uniformity of the spray pattern was improved by In this case, multiple plates 9 3 (shown in phantom) into the exit chamber 87 and equally along the length of the exit chamber 87. May be placed separately. Although one and three plates 93 are shown, two plates 93 should also be satisfied. and are arranged symmetrically within the outlet chamber 87 and along the length of the outlet chamber 87. It is anticipated that more than two plates 93 could be used if equally spaced.

The last embodiment is illustrated in FIGS. 8 and 9, which have a diameter of 1.9 mm, A spray head including an outlet tube 99 dimensioned to provide an outlet chamber 101 of length 221 The head assembly 97 is shown. The outlet pipe 99 is configured to form a rectangular orifice 103. The material is wrinkled or shaped, and its longitudinal center is inserted into the spray head 105. It is located 11 degrees from the end of the outlet pipe 99. The length of the orifice 103 is approximately 2 mm, and as best seen in Figure 9, the cross section is rectangular with rounded ends and flat. The dimension between the rounded surfaces 10γ and 109 is 0.75'mm. In this case, the relevant The dimensions and shape of the spray head 105, outlet passage 111, and nozzle opening 1130 are as follows. This is the same as the spray head 81, outlet passage 89, and nozzle opening 91 in FIG. be satisfied The embodiment of FIG. 8 is shown for making a fan atomizer mold, and has the advantage of reduced cost. ゛ may be provided separately.

Figures 10 and 11 show the container 1 and the nozzle opening 13°77.91 or 113°. Orifices 43, 74 in spray head assembly 7°63, γ9 or 97 between 0 It represents the effect of providing 95 or 103. FIG. 10 shows that the nozzle opening 13 is , Spray from above onto a horizontal surface using container 1 held at approximately 45 degrees at a distance of 150 mm from the surface. A spray head similar to the spray head of FIG. 2 that appears when This is a part of the fan spray mold 115 made by.

The spray mold 115 has sharply defined thread-like edges or tails 117 on each end, and the mold 115 is characterized by a shallow spray area 119 towards the end. Also, the amount of material sprayed is It was found that the weight became much heavier from the bottom toward the top of the mold 1150.

Figure 11 shows the orifices 43, 74, 95, 10 shown in Figure 2.5.6.8. Under the same conditions, spray head assembly body 7, 63, 79.97 containing any of 3. This is the fan spray mold 121 that I made. The spray mold 121 shown in FIG. 11 has a missing tail portion 117. The spray mold 115 of FIG. be identified. One shallow spray area 123 located in the bottom half of the spray mold 121 is generally This region 123 is similar to the shallow spray region in the spray mold 115 in FIG. have been found to contain more than 100% of sprayed material. Furthermore, orifice 43 ．． The spray mold 121 created when using 74.95 or 103 has an orifice 43.74.95 or 103 or 103. It has been found to be more uniform from edge to edge than the fog type.

The difference between the spray mold 115 of FIG. 10 and the spray mold 121 of FIG. 11 is illustrated by the following example. and that each of the spray head assemblies 7, 63, 79 or 97 described herein A fan spray mold 121 made according to the seed embodiment and similar to that in FIG. 2 but with restraints. Compared to fan atomizer mold 115 made with an atomizer head assembly that does not include section 41. Strengthen comparison. Examples of stiffness are presented to aid in understanding the invention and to limit its scope. Don't interpret it that way.

Examples 1-7 In methylene chloride? A solution of dichloroprene contact adhesive was prepared with the composition shown below in Table 1. Prepared using minutes and quantities.

Table 1 T-butylphenol resin 6.4 Magnesium oxide 1.4 Water 0.07 Methylene chloride 68.4 1゛Neoprene AC''　E, 1. Commercially available from DuPont Denemose Company.

Put this chemical component into a 475!3 aerosol container 1 and cover it with a conventional can valve 5. Ta. Fill container 1 with 24 g of dimethyl ether through valve 5, thereby increasing the volume. An adhesive solids level of 11.1% is established in vessel 1. The pressure inside the aerosol container 1 is , reached about 0.017 megapascals. Spray head assembly 7 of FIG. 2.5.6.8. 63.79.97 and a spray head assembly similar to that of FIG. 2 but without the restraint 41. The bodies are then placed on the container valves 5 and the containers 1 are inserted into the nozzle at an angle of approximately 45° to each. The opening was held approximately 150 degrees from the foil paper placed on a horizontal surface. Same solution as above Spray the seedling soil and let it dry, then the spray mold is cut into five equal widths, each with a Includes 20% of the mold dimension transverse to the direction of spraying action. The valley width is measured and the material are removed with a solvent and the widths are further dried and reweighed, thereby resolving the first contact on each width. Obtain the amount of dressing material.

In this manner, the uniformity of the spray molds produced by each embodiment according to the present invention was compared with each other. and compared to a spray head assembly that does not include a restraint. These comparisons The results are listed below Table 2, and these are for spraying with the same example number and drawing number. head assembly 7,63°79 or 97 and spray expressed as total amount sprayed Contains the amount of material in one-fifth of the fog type.

Table 2 Material in the width 14 of the spray mold 2 5 22.6 23.8 23.8 10.7 19.0 Complete spray type Each fifth of the spray molds will contain exactly 20% of the total amount of material atomized.

None of the spray head assemblies 7, 63, 79 or 97 reach this level of perfection. However, any of the orifice 43, 74, 95 or 103 embodiments described above The spray head assembly 7, 63, 79 or 97 includes an orifice. This example shows that the fan creates a more uniform spray pattern than a non-atomizer head assembly would. are doing.

When spraying soluble elastomeric adhesive polymers at low pressure, the special The nozzle opening 13.77°91.113 arrangement allows for fan spraying that is acceptable on the market. As molded and demonstrated, various embodiments of the restraining portion 41.73°93.103 increases the uniformity of the spray mold produced. This spray head structure is an airless spray / when using the device, approximately 0.14 and 0.69 compared to the required approximately 6.9 MPa. Atomizes polymer adhesives in solution at typical aerosol container pressures of between megapascals. It is possible to mist. This ability to spray at low pressures and the incredible pressure phase The difference is that the propulsion source is in a solid solution with the adhesive, and a part of the propulsion source is mixed with the adhesive solution. This is partly due to the fact that it is sprayed on.

Propulsion sources used effectively are dimethyl ether, propane, and isobutane. , chlorofluorocarbons and combinations thereof. Carbon dioxide gas that does not enter the solution Or other propulsion/power sources typically used in aerosol applications, such as saltpeter oxide , which produce satisfactory spray molds at low adhesion solids levels, but at the desirably high levels described herein. If the level is too low, a satisfactory spray pattern cannot be produced.

In addition to polychloroprene, other materials that could be successfully sprayed using the published structure were , non-crosslinked nitrile polymers, natural rubber, acrylic resins, butyl rubber non-cross-linked SBR polymer, cross-linked SBR polymer, butadiene styrene copolymers, aliphatic cyclic polyesters, vinyl-vinyl chloride acetate copolymers, The polymer description is not to be construed as being limited to these examples.

In particular, a number of preferred shapes and dimensions have been provided for illustrative purposes only. The present invention It includes all alternatives and modifications that come within the scope of the appended claims.

//7 international search report

Claims (1)

[Claims] 1. The valve (5) defines an inlet (23) and is slidably and sealably installed in the valve (5). Spray head assembly (7, 73, 79, 97) with attached inlet stem (17) , intersects the inlet stem (17) and terminates within the nozzle opening (13,77°91.113). outlet pipe (1i, 67°85.99), and inlet (23) and nozzle opening (13, γ7.91.113) , 75, 89, 111), the container (1) comprising: The spray head (7, 63, 79, 97) is pressed down into the valve (5). Filling at low pressure with material that can be sprayed through the nozzle opening (13,77°91.113) In the above-mentioned aerosol container which is filled with 111) and the end of the outlet pipe (11, 67, 85, 99) having an elongated groove (51) defining a terminal surface, said groove (51) defining said outlet tube passageway (49); , 75, 89, 111), thereby intersecting the openings (13, 77, 91, 11 3), and the groove extends substantially from the opening (13, 77, 91° 113). The above aerosol container (1) is characterized in that it is long. 2 Cross-sectional area substantially larger than the cross-sectional area of the passage (25, 49, 75, 89, 111) and is arranged between the nozzle opening (13, 77, 91, 113) and the inlet (23). The restraint part (41, 73) that defines the orifice (43, 74, 95, 103) , , 93, 103). Vessel (1). 6. The orifice (43, 74, 95, 103) is connected to the outlet pipe passage (49, 75, 8 9,111,) is coaxial with the aerosol container according to claim 2, Vessel (1). 4. The orifices (43, 74, 95, 103) are connected to the inlet stem (17) and the outlet pipe ( 11, 67, 85, 99) aerosol container (1). 5 Coaxial with the outlet pipe passage (75, 89, 111), the outlet pipe (67, 85, 99) The section is substantially larger than the cross-sectional area of the outlet pipe passageway (75, 89, 111). Claims characterized in that it has an exit chamber (69, 87, 101) having an area Aerosol container (1) according to paragraph 2. 6 The orifice (74) is coaxial with the outlet pipe passageway (75) and is coaxial with the inlet pipe (11). is arranged between the outlet pipes (67), and further the outlet chamber (69) extends to the restraining part (73). Claim No. 3, characterized in that it thereby communicates directly with said orifice (74). Aerosol container (1) of item 5. The Z orifice (95) is coaxial with the outlet pipe passageway (89) and inside the outlet chamber (87). Aerosol container (1) according to claim 5, characterized in that it is arranged in a. 8. The restraint part (93) has a plurality of parts that are coaxial with each other and coaxial with the outlet pipe passageway (89). orifices (95) disposed within the exit chamber (87); ) are equally spaced from each other along K. container (1). 9 The orifice (103) has a substantially rectangular cross-sectional area and is located within the exit chamber (101). Claim characterized in that it is arranged and centered with respect to the cross-sectional area of the outlet chamber (101) Aerosol containers (1) according to scope 5. 10.Claims 4 and 6. , aerosol containers (1 ), and the orifice (43, 74, 95) or orifice (95) is a nozzle. Said having a circular cross-sectional area substantially equal to the cross-sectional area of the hole opening (13, 77, 91) Standard azole container (1). 11, the groove (51) extends across the width of the outlet pipe (11, 67, 85°99); , having an open end. Vessel (1). 12. The groove (51) has a V-shaped cross section and a bevel angle from 40 degrees to 120 degrees. A claim characterized in that it has a side surface (55°57) arranged at Aerosol containers (1) according to any of the headings. 16, the outlet pipe passage (49, 75, 89.111) is a cone that intersects the groove (-51) It ends in a taper, thereby creating a shape that corresponds to a parabola that intersects two diagonals. characterized by forming a nozzle opening (13, 77.91.113) with The aerosol container (1) according to claim 12. 14. Having a motive force source that is soluble in the material, a portion of which is sprayed together with the material. Aerosol container (1) according to any of the preceding claims, characterized in that: 15. The motive force source soluble in the material is dimethyl ether, propane, isobutyl , fluorine trichloride methane, difluorine methane dichloride, trifluorine methane chloride, fluorine dichloride Comprising of The aerosol container (1) of claim 14, characterized in that the aerosol container (1) is selected from the group consisting of ).