CN108584160B - Pressure balance composite liner and manufacturing method thereof - Google Patents
Pressure balance composite liner and manufacturing method thereof Download PDFInfo
- Publication number
- CN108584160B CN108584160B CN201810493729.5A CN201810493729A CN108584160B CN 108584160 B CN108584160 B CN 108584160B CN 201810493729 A CN201810493729 A CN 201810493729A CN 108584160 B CN108584160 B CN 108584160B
- Authority
- CN
- China
- Prior art keywords
- layer
- composite
- cushion layer
- sheet
- pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
- B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
- B65D81/127—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using rigid or semi-rigid sheets of shock-absorbing material
- B65D81/1275—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using rigid or semi-rigid sheets of shock-absorbing material laminated or bonded to the inner wall of a container
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Closures For Containers (AREA)
Abstract
The invention relates to the technical field of container sealing, in particular to a pressure balance composite liner and a manufacturing method thereof. According to the invention, the composite pad comprising the breathable cushion layer and the bearing cushion layer is arranged, the grooves on the breathable cushion layer are used as tunnels for communicating the inside and the outside of the container so as to balance the air pressure inside and outside the container, and the functions of preventing liquid leakage and simultaneously transmitting gas can be realized by controlling the size of the cross section area of the tunnels and the length of the tunnels. In addition, the breathable cushion layer and the bearing layer of the composite cushion are respectively thick in the breathable film in the existing sealing piece, and the composite cushion has better structural impact resistance than the film and can meet the impact resistance requirement of repackaging. The manufacturing method of the composite gasket is simple and easy to implement, and the groove serving as a tunnel can be directly carved and formed on the pre-bonded composite gasket base material by laser; the composite liner with the tunnel structure can be conveniently and quickly obtained.
Description
Technical Field
The invention relates to the technical field of container sealing, in particular to a pressure balance composite gasket and a manufacturing method thereof.
Background
In the storage of some slowly fermented foods or some chemicals having decomposing or volatile gas properties, the pressure in the bottle is often increased due to the slow generation of gas in the bottle, which is often manifested as a bottle expansion on some plastic bottles. In addition, for some products that absorb the gas in the bottle, such as oxygen-consuming contents, the pressure of the gas in the bottle becomes lower and the bottle collapses with atmospheric pressure. For the content containing liquid, in order to ensure that the sealing is not leaked, the bottle mouth is usually completely closed, so that the liquid in the bottle body is not leaked, but the pressure difference between the gas pressure in the bottle body and the external atmospheric pressure is caused, the bottle is inflated or deflated, and for the relatively rigid bottle body, the pressure in the bottle can cause risks such as accidental ejection of the content.
To solve the problem of gas permeation while ensuring a seal against liquids, US20040214492A1 discloses a Polytetrafluoroethylene (PTFE) film which utilizes a combination of film and surface coating to achieve the purpose of permeation of water vapor while preventing permeation or permeation of liquids or other gases. CN206781154U discloses a gasket structure, which realizes the function of permeating gas by using a gasket structure formed by combining polytetrafluoroethylene and non-woven fabrics.
Both of these schemes utilize the breathability of the polytetrafluoroethylene film, but also suffer from significant drawbacks. In order to meet the air permeability requirement and prevent liquid from penetrating or permeating the membrane body, a coating (such as US20040214492A 1) or a vinylidene chloride treatment (such as CN 206781154U) needs to be applied to the surface of the polytetrafluoroethylene, and the air permeability of the polytetrafluoroethylene membrane is affected by such treatment, and the air permeability is affected by poor treatment of the thickness of the coating. Thus, to meet the better permeability properties, the coating is generally relatively thin and requires very careful control, and the thickness of the polytetrafluoroethylene film must not be too high. This has the disadvantage that the shock and drop of the sealed container during handling causes a severe rise in pressure in the container during the very short time of impact, and the film is too thin to withstand such high strength impacts, which has limited the application of such films to lighter products. Although the non-woven fabric and the polytetrafluoroethylene film are used in CN206781154U to be overlapped to enhance the impact resistance, the film needs to be hot-melted or adhesive is adhered on the inner top cover at the same time in the used hot-melting process, and because the film is thinner, the film is very inconvenient in a hot-melting or adhesive mode, and the quality stability is poor, once the fusion part is damaged during the hot melting of the film or the adhesive is influenced by the content to lose the viscosity, the whole gasket structure can lose the sealing capability, and the liquid is easy to leak to cause danger.
Disclosure of Invention
The invention provides a pressure balance composite gasket for balancing the internal and external air pressure of a container, which is simple to manufacture, can resist larger impact force and can prevent substances in the container from leaking accidentally, and a manufacturing method of the pressure balance composite gasket, aiming at the problem that when the existing sealing element for balancing the internal and external air pressure of the container is subjected to higher impact force (such as vibration or drop in the carrying process), a membrane in the sealing element is easy to damage, and the container has leakage risk.
In order to achieve the above purpose, the present invention adopts the following technical scheme.
The pressure balance composite pad comprises a bearing pad layer and a ventilation pad layer which are fixedly attached together, wherein a first perforation is arranged in the middle of the bearing pad layer, and a second perforation is arranged in the middle of the ventilation pad layer;the breathable cushion layer is provided with a groove from the edge of the second perforation to the outer edge of the breathable cushion layer, the length of the groove is 4-60mm, and the cross section area of the groove is 78-785400 mu m 2 。
Preferably, the pressure balance composite pad further comprises a top pad layer, and the bearing pad layer, the ventilation pad layer and the top pad layer are sequentially overlapped, fixed and bonded together.
More preferably, a third perforation is arranged in the middle of the top cushion layer.
Preferably, the top pad layer is composed of at least one material of cardboard, metal foil, foamed PE (foamed polyethylene), PE (polyethylene), PP (polypropylene) and PVC (polyvinyl chloride).
Preferably, the breathable cushion layer is a PET layer (polyethylene terephthalate) or a PA layer (polyamide) or a modified PE layer; the modified PE layer is a PE film containing 0.5-10wt.% of titanium dioxide, and the particle size distribution of the titanium dioxide is between 0.08-2 mu m.
Preferably, the bearing cushion layer is a PE layer or a PP layer or a foaming PE layer.
Preferably, the bearing cushion layer and the ventilation cushion layer are annular, and the annular width is 8-15mm; 20-40 grooves are formed in the breathable cushion layer, and the length of each groove is 8-12mm.
The preparation method of the pressure balance composite gasket comprises the following steps:
s1, overlapping and fixing a first sheet for manufacturing the bearing cushion layer and a second sheet for manufacturing the ventilation cushion layer together to form the composite cushion substrate.
When the pressure balance composite pad further comprises a top pad layer, in the step S1, a first sheet for manufacturing the bearing pad layer, a second sheet for manufacturing the air-permeable pad layer, and a third sheet for manufacturing the top pad layer are stacked and fixed together to form the composite pad substrate.
Preferably, the first sheet is a PE or PP or foamed PE layer; the second sheet is a PET film or a PA film or a PE modified film, the PE modified film is a PE film containing 0.5-10wt.% of titanium dioxide, and the particle size distribution of the titanium dioxide is between 0.08 and 2 mu m; the third sheet material is composed of at least one material selected from the group consisting of paperboard, metal foil, foaming PE, PP and PVC.
S2, manufacturing the cross section area of the second sheet material to be 78-785400 mu m 2 Is provided.
Preferably, the grooves are formed by engraving lines in the second sheet material with a carbon dioxide laser through the first sheet material.
S3, punching perforations on the composite gasket base material, forming first perforations on the first sheet material to form a bearing cushion layer, and forming second perforations on the second sheet material to form a ventilation cushion layer; the grooves on the second sheet are divided into two parts during punching and perforating, and the length of the grooves is 4-60mm.
Preferably, in the step S3, the composite spacer substrate is die-cut into a ring shape.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the composite pad comprising the breathable cushion layer and the bearing cushion layer is arranged, the grooves on the breathable cushion layer are used as tunnels for communicating the inside and the outside of the container so as to balance the air pressure inside and outside the container, and the functions of preventing liquid leakage and simultaneously transmitting gas can be realized by controlling the size of the cross section area of the tunnels and the length of the tunnels. In addition, the breathable cushion layer and the bearing layer of the composite cushion are respectively thick in the breathable film in the existing sealing piece, and the composite cushion has better structural impact resistance than polytetrafluoroethylene film and can meet the impact resistance requirement of repackaging. The manufacturing method of the composite gasket is simple and easy to implement, and the groove serving as a tunnel can be directly carved and formed on the pre-bonded composite gasket base material by laser; when the composite liner has a three-layer structure, the first sheet material can be used for carving the second sheet material to form the groove by selecting proper sheet materials, so that the composite liner with a tunnel structure can be conveniently and quickly obtained.
The principle of the invention is that a groove with a certain cross-section area and a certain length is introduced into a composite liner to form a tunnel which is communicated with the inside and the outside of a container, the pressure drop of the tunnel is calculated according to a van-to-n equation, deltaP=A multiplied by mu multiplied by u multiplied by L/d-2, wherein L is the radius of a pipeline, in this example, the radius of the tunnel is rho is the density of fluid, mu is the viscosity of the fluid, u is the flow velocity, and A is the constant related to the friction coefficient of the fluid and the pipeline. As can be seen from the pressure drop equation, the mass and viscosity characteristics of the fluid are different, and the pressure drop loss of the gas is much smaller than that of the liquid. Thus, the flow conditions in such tunnels are greatly different. When the resistance is greater than the static pressure generated by inversion of the liquid in the container, the liquid is prevented from flowing out of the tunnel in the tunnel until the flow speed of the liquid is reduced to the minimum, and the resistance in the tunnel and the pressure of the liquid in the container are balanced. The friction coefficient of the air in the tunnel is extremely small, the flow speed is not fast, and the air pressure is easily balanced by the mutual communication of the tunnel when the pressure difference exists between the inside and the outside of the container, so that the functions of balancing the air pressure inside and outside the container and preventing liquid from leaking accidentally can be achieved by reasonably setting the diameter and the length of the tunnel.
Drawings
Fig. 1 is a schematic structural diagram of a bearing pad layer in embodiment 1;
FIG. 2 is a schematic structural view of the air-permeable mat of example 1;
FIG. 3 is a schematic view of the structure of the top mat layer in example 1;
FIG. 4 is a schematic structural view of the pressure-balanced composite gasket of example 1;
FIG. 5 is a schematic structural diagram of the composite spacer substrate of example 1;
FIG. 6 is a schematic structural diagram of the composite spacer substrate after grooves are formed in the second sheet in example 1;
FIG. 7 is a schematic structural view of the pressure-balanced composite gasket of example 2;
FIG. 8 is a schematic view of the air-permeable gasket of example 2;
FIG. 9 is a schematic structural view of the composite spacer substrate described in example 2;
FIG. 10 is a schematic view of the structure of the composite spacer substrate after forming grooves in the second sheet in example 2;
FIG. 11 is a schematic view of the structure of the air-permeable mat of example 5.
Detailed Description
In order to more fully understand the technical content of the present invention, the technical solution of the present invention will be further described and illustrated with reference to specific embodiments.
Example 1
The embodiment provides a pressure balance composite gasket and a manufacturing method of the pressure balance composite gasket.
Referring to fig. 1 to 4, the pressure balance composite pad of this embodiment is in the shape of a ring, the ring width is 9±1mm, the ring outer diameter is 35mm, and includes an annular bearing pad layer 110, a ventilation pad layer 120 and a top pad layer 130 which are sequentially stacked and fixedly bonded together. The middle part of the bearing cushion layer 110 is provided with a first perforation 111, the middle part of the ventilation cushion layer 120 is provided with a second perforation 121, and the middle part of the top cushion layer 130 is provided with a third perforation 131. The air-permeable cushion layer 120 is provided with 20 grooves 122 extending from the edge of the second through holes 121 to the outer edge of the air-permeable cushion layer 120 (i.e. the grooves 122 extend through the ring surface of the air-permeable cushion layer 120), the length of the grooves 122 is 8-12mm, the width of the grooves 122 is 10 μm, and the cross-sectional area of the grooves 122 is about 78.5 μm 2 . In this embodiment, the top cushion layer 130 is a foamed PE sheet having a thickness of 2mm, the air-permeable cushion layer 120 is a PET layer having a thickness of 12 μm, and the carrier cushion layer 110 is a transparent PE layer having a thickness of 60. Mu.m.
The manufacturing method of the pressure balance composite gasket of the embodiment is as follows:
s1, sequentially overlapping and bonding and fixing a first sheet for manufacturing a bearing cushion layer, a second sheet for manufacturing a ventilation cushion layer and a third sheet for manufacturing a top cushion layer together by using gluing equipment to form a composite gasket base material, as shown in fig. 5. The first sheet is PE, the second sheet is PET film, and the third sheet is foamed PE.
S2, 10 scribing lines with the line width of 10 mu m are etched on the composite gasket base material through the first sheet material at the speed of 100mm/min and the power of 90% (90% of the actual power of the laser is 30W when the laser equipment is set to work) on the second sheet material by using 30W carbon dioxide laser, and the scribing lines penetrate through two ends of the second sheet material, so that grooves are formed on the second sheet material, as shown in fig. 6. (with a 30W carbon dioxide laser, the power is set between 60-90% and the second sheet is scanned at a speed of 100mm/min, the illuminated area will form a pit.)
S3, punching the composite gasket base material into an annular gasket, wherein the annular gasket is 9+/-1 mm in annular width and 35mm in annular outer diameter, forming a first perforation on a first sheet to form a bearing cushion layer, forming a second perforation on a second sheet to form a ventilation cushion layer, and forming a third perforation on a third sheet to form a top cushion layer, so as to obtain the pressure balance composite gasket, as shown in fig. 4. After punching, the second perforation divides the groove on the second sheet into 20 grooves, and the length of the groove is 8-12mm.
The composite liner of the embodiment is placed in the bottle cap, the top cushion layer faces the inner top of the bottle cap, the bearing cushion layer faces the bottle opening of the bottle, when the bottle cap is screwed on the bottle opening of the bottle, the end part of the bottle opening is abutted against the annular surface of the bearing cushion layer, one end of the groove in the composite liner is exposed in the bottle, and the other end of the groove is exposed at the outer edge of the bottle opening, so that a channel communicated with the inside and the outside of the bottle is formed through the groove of the composite liner and a gap of threads between the bottle cap and the bottle opening. Filling the bottle with a liquid with the viscosity of 1mPa×s, placing a composite liner in the bottle cap, screwing the bottle cap and the bottle mouth to be tightly matched, inverting the bottle, and ensuring that the bottle has no liquid leakage after 12 hours; the liquid in the bottle is changed into 500g of 10% sodium bicarbonate solution (accounting for 85% of the volume of the bottle), the bottle cap with the composite liner is tightly screwed and sealed immediately after 10g of sodium hydroxide solid is added, and the bottle body is observed after 12 hours, so that no bulge phenomenon exists. The bottle is dropped from the height of 1.2m, and the composite liner is free from damage and deformation.
Example 2
The embodiment provides a pressure balance composite gasket and a manufacturing method of the pressure balance composite gasket.
Referring to fig. 7-8, the pressure balance composite pad of the present embodiment is in the shape of a ring with a ring width of 14-15mm and a ring outer diameter of 64mm, and includes an annular bearing pad layer 210 and a ventilation pad layer 220 which are sequentially stacked and fixedly bonded together. The middle part of the bearing pad layer 210 is provided with a first perforation 211, and the middle part of the ventilation pad layer 220 is provided with a second perforation 221. The air-permeable cushion layer 220 is provided with 20 grooves 222 extending from the edge of the second through hole 221 to the outer edge of the air-permeable cushion layer 220 (i.e. the grooves 222 extend through the ring surface of the air-permeable cushion layer 220), the length of the grooves 222 is 14-17mm, the width of the grooves 222 is 60 μm, and the cross-sectional area of the grooves 222 is 2827 μm 2 . In this embodiment, the carrier mat 210 is a foamed PE sheet having a thickness of 2mm, and the air-permeable mat 220 is a PET layer having a thickness of 65. Mu.m.
The manufacturing method of the pressure balance composite gasket of the embodiment is as follows:
s1, stacking, bonding and fixing a first sheet for manufacturing a bearing cushion layer and a second sheet for manufacturing a ventilation cushion layer together by using a gluing device to form a composite cushion substrate, wherein the composite cushion substrate is shown in fig. 9. The second sheet is PET film, and the first sheet is foamed PE.
S2, etching 10 score lines with the line width of 60 mu m on the second sheet directly on the composite gasket base material by using carbon dioxide laser, and enabling the score lines to penetrate through two ends of the second sheet so as to form grooves on the second sheet, as shown in fig. 10. (the power and speed of carbon dioxide laser were set as in example 1.)
S3, punching the composite gasket base material into an annular gasket, wherein the annular gasket is 14-15mm in annular width and 64mm in annular outer diameter, forming a first perforation on a first sheet to form a bearing cushion layer, and forming a second perforation on a second sheet to form a ventilation cushion layer, so as to obtain the pressure balance composite gasket, as shown in fig. 7. After punching, the second perforation divides the groove on the second sheet into two parts to form 20 grooves, and the length of the grooves is 14-17mm.
The composite liner of the embodiment is placed in the bottle cap, the breathable cushion layer faces the inner top of the bottle cap, the bearing cushion layer faces the bottle opening of the bottle, when the bottle cap is screwed on the bottle opening of the bottle, the end part of the bottle opening is abutted to the ring surface of the bearing cushion layer, one end of the groove in the composite liner is exposed in the bottle, and the other end of the groove is exposed at the outer edge of the bottle opening, so that a channel communicated with the inside and the outside of the bottle is formed through the groove of the composite liner and a gap between the bottle cap and the bottle opening. Filling the bottle with a liquid with the viscosity of 12000mPa×s, placing a composite liner in the bottle cap, screwing the bottle cap and the bottle mouth to tightly fit, inverting the bottle, and keeping the bottle free from liquid leakage after 12 hours; the liquid in the bottle is changed into 500g of 10% sodium bicarbonate solution (accounting for 85% of the volume of the bottle), the bottle cap with the composite liner is tightly screwed and sealed immediately after 10g of sodium hydroxide solid is added, and the bottle body is observed after 2 hours, so that no bulge phenomenon exists. The bottle is dropped from the height of 1.2m, and the composite liner is free from damage and deformation.
Example 3
The embodiment provides a pressure balance composite gasket and a manufacturing method of the pressure balance composite gasket.
The pressure balance composite pad of the embodiment is annular, the annular width is 8-10mm, the annular outer diameter is 35mm, and the pressure balance composite pad comprises an annular bearing pad layer and an air-permeable pad layer which are sequentially overlapped, fixed and adhered together. The middle part of the bearing cushion layer is provided with a first perforation, and the middle part of the breathable cushion layer is provided with a second perforation. 20 grooves (namely, the grooves penetrate through the annular surface of the breathable cushion layer) from the edge of the second perforation to the outer edge of the breathable cushion layer are formed in the breathable cushion layer, the length of each groove is 8-12mm, the width of each groove is 10 mu m, and the cross section area of each groove is about 78.5 mu m 2 . In this embodiment, the bearing cushion layer is a foamed PE sheet with a thickness of 2mm, the air-permeable cushion layer is a modified PE layer with a thickness of 15 μm, the modified PE layer is a PE film containing 2wt.% of titanium dioxide, and the particle size distribution of the titanium dioxide is between 0.08 and 2 μm.
The manufacturing method of the pressure balance composite gasket of the embodiment is as follows:
s1, stacking, bonding and fixing a first sheet material for manufacturing the bearing cushion layer and a second sheet material for manufacturing the ventilation cushion layer together by using a gluing device to form the composite cushion substrate. The second sheet is a modified PE layer, and the first sheet is foamed PE.
S2, etching 10 scribing lines with the line width of 10 mu m on the second sheet of the composite gasket base material directly by using carbon dioxide laser, and enabling the scribing lines to penetrate through two ends of the second sheet so as to form grooves on the second sheet. (the power and speed of carbon dioxide laser were set as in example 1.)
S3, punching the composite gasket base material into an annular gasket, wherein the annular gasket is 8-10mm in annular width and 35mm in annular outer diameter, forming a first perforation on a first sheet to form a bearing cushion layer, and forming a second perforation on a second sheet to form a ventilation cushion layer, so that the pressure balance composite gasket is manufactured. After punching, the second perforation divides the groove on the second sheet into 20 grooves, and the length of the groove is 8-12mm.
The composite liner of the embodiment is placed in the bottle cap, the breathable cushion layer faces the inner top of the bottle cap, the bearing cushion layer faces the bottle opening of the bottle, when the bottle cap is screwed on the bottle opening of the bottle, the end part of the bottle opening is abutted to the ring surface of the bearing cushion layer, one end of the groove in the composite liner is exposed in the bottle, and the other end of the groove is exposed at the outer edge of the bottle opening, so that a channel communicated with the inside and the outside of the bottle is formed through the groove of the composite liner and a gap between the bottle cap and the bottle opening. Filling the bottle with a liquid with the viscosity of 600 mPas, placing a composite liner in the bottle cap, screwing the bottle cap and the bottle mouth to be tightly matched, inverting the bottle, and avoiding liquid leakage of the bottle after 12 hours; the liquid in the bottle is changed into 500g of 10% sodium bicarbonate solution (accounting for 85% of the volume of the bottle), the bottle cap with the composite liner is tightly screwed and sealed immediately after 10g of sodium hydroxide solid is added, and the bottle body is observed after 8 hours, so that no bulge phenomenon exists. The bottle is dropped from the height of 1.2m, and the composite liner is free from damage and deformation.
Example 4
The embodiment provides a pressure balance composite gasket and a manufacturing method of the pressure balance composite gasket.
The pressure balance composite pad of the embodiment is annular, the annular width is 14-15mm, the annular outer diameter is 64mm, and the pressure balance composite pad comprises an annular bearing pad layer and an air permeable pad layer which are sequentially overlapped, fixed and adhered together. The middle part of the bearing cushion layer is provided with a first perforation, and the middle part of the breathable cushion layer is provided with a second perforation. The ventilation cushion layer is provided with 40 grooves extending from the edge of the second perforation to the outer edge of the ventilation cushion layer (namely, the grooves penetrate through the ring surface of the ventilation cushion layer), the length of each groove is 14-17mm, the width of each groove is 60 mu m, and the cross section area of each groove is 2827 mu m 2 . In this example, the carrier mat was a foamed PE sheet having a thickness of 2mm, and the breathable mat was a PET layer having a thickness of 12. Mu.m.
The manufacturing method of the pressure balance composite gasket of the embodiment is as follows:
s1, stacking, bonding and fixing a first sheet material for manufacturing the bearing cushion layer and a second sheet material for manufacturing the ventilation cushion layer together by using a gluing device to form the composite cushion substrate. The second sheet is PET film, and the first sheet is foamed PE.
S2, etching 20 scribing lines with the line width of 60 mu m on the second sheet of the composite gasket base material directly by using carbon dioxide laser, and enabling the scribing lines to penetrate through two ends of the second sheet so as to form grooves on the second sheet. (the power and speed of carbon dioxide laser were set as in example 1.)
S3, punching the composite gasket base material into an annular gasket, wherein the annular gasket is 14-15mm in annular width and 64mm in annular outer diameter, forming a first perforation on a first sheet to form a bearing cushion layer, and forming a second perforation on a second sheet to form a ventilation cushion layer, so that the pressure balance composite gasket is manufactured. After punching, the second perforation divides the groove on the second sheet into 40 grooves, and the length of the groove is 14-17mm.
The composite liner of the embodiment is placed in the bottle cap, the breathable cushion layer faces the inner top of the bottle cap, the bearing cushion layer faces the bottle opening of the bottle, when the bottle cap is screwed on the bottle opening of the bottle, the end part of the bottle opening is abutted to the ring surface of the bearing cushion layer, one end of the groove in the composite liner is exposed in the bottle, and the other end of the groove is exposed at the outer edge of the bottle opening, so that a channel communicated with the inside and the outside of the bottle is formed through the groove of the composite liner and a gap between the bottle cap and the bottle opening. Filling the bottle with a liquid with the viscosity of 1mPa×s, placing a composite liner in the bottle cap, screwing the bottle cap and the bottle mouth to be tightly matched, inverting the bottle, and ensuring that the bottle has no liquid leakage after 12 hours; the liquid in the bottle is changed into 400g of 10% hydrogen peroxide solution (accounting for 85% of the volume of the bottle), after 5g of ferrous hydroxide solid is added, the bottle cap with the composite liner is tightly screwed and sealed, and after 4 hours, the bottle body is observed, so that no bulge phenomenon exists. The bottle is dropped from the height of 1.2m, and the composite liner is free from damage and deformation.
In other embodiments, the top pad layer may also be a board made of at least one of cardboard, metal foil, foamed PE, PP, and PVC; the breathable cushion layer can also select a PA layer or a modified PE layer with the titanium dioxide content of 0.5-10wt.% and the grain size distribution of 0.08-2 mu m; the bearing cushion layer can also be selected from a PP layer.
In other embodiments, the cross-sectional area of the grooves in the breathable backing layer may also be as large as 785400μm 2 I.e. the groove width of the groove may be as wide as about 1000 μm and the length of the groove may be set between 4 and 60mm. When the pressure balance composite liner is matched with a bottle cap and a bottle for use, the bottle can be used for containing liquid with the viscosity of 1mpa multiplied by s to 20000mpa multiplied by s, and the bottle filled with the liquid is inverted for 12 hours without liquid leakage.
Example 5
The embodiment provides a pressure balance composite gasket and a manufacturing method of the pressure balance composite gasket.
The pressure balance composite pad of this embodiment is annular, the annular width is 9±1mm, the annular outer diameter is 35mm, and includes an annular bearing pad layer, a breathable pad layer 520 (refer to fig. 11) and a top pad layer which are sequentially stacked and fixed together. The middle part of the bearing cushion layer is provided with a first perforation, the middle part of the ventilation cushion layer 520 is provided with a second perforation 521, and the middle part of the top cushion layer is provided with a third perforation. The air-permeable cushion layer 520 is provided with 20 grooves 522 extending from the edge of the second through holes 521 to the outer edge of the air-permeable cushion layer 520 (namely, the grooves 522 penetrate the ring surface of the air-permeable cushion layer 520), the length of the grooves 522 is 8-12mm, the width of the grooves 522 is 0.2mm, and the cross-sectional area of the grooves 522 is about 31400 μm 2 . In this example, the top cushion layer is a foamed PE sheet having a thickness of 2mm, the air-permeable cushion layer 520 is a PET layer having a thickness of 12 μm, and the carrier cushion layer is a transparent PE layer having a thickness of 60. Mu.m.
The manufacturing method of the pressure balance composite gasket of the embodiment is as follows:
s1, sequentially overlapping and bonding and fixing a first sheet for manufacturing a bearing cushion layer, a second sheet for manufacturing a ventilation cushion layer and a third sheet for manufacturing a top cushion layer together by using gluing equipment to form a composite gasket base material. The first sheet is PE, the second sheet is PET film, and the third sheet is foamed PE.
S2, processing 10 groups of scribing groups on a second sheet material through a first sheet material on a composite gasket base material by using 30W carbon dioxide laser at a speed of 100mm/min and a power of 10% (the actual power of the laser is 10% of the actual power of 30W when the laser equipment is set to work), wherein the scribing groups are formed by two mutually parallel protruding scribing lines with a line width of 10 mu m and a distance of 0.2mm (the second sheet material is irradiated by using the 30W carbon dioxide laser at a speed of 100mm/min, the irradiated areas are fused and expanded to form protruding lines), each scribing group penetrates through two ends of the second sheet material, and each scribing group passes through the subsequent area for manufacturing a second perforation on the second sheet material, and after the scribing groups are punched, required grooves are formed on the second sheet material.
S3, punching the composite gasket base material into an annular gasket, wherein the annular gasket is 9+/-1 mm in annular width and 35mm in annular outer diameter, forming a first perforation on a first sheet to form a bearing cushion layer, forming a second perforation on a second sheet to form a ventilation cushion layer, and forming a third perforation on a third sheet to form a top cushion layer, so that the pressure balance composite gasket is manufactured. After punching, the second perforation divides the groove on the second sheet into 20 grooves, and the length of the groove is 8-12mm.
The composite liner of the embodiment is placed in the bottle cap, the bearing cushion layer faces the inner top of the bottle cap, the top cushion layer faces the bottle opening of the bottle, when the bottle cap is screwed on the bottle opening of the bottle, the end part of the bottle opening is abutted against the annular surface of the top cushion layer, one end of a groove in the composite liner is exposed in the bottle, and the other end of the groove is exposed at the outer edge of the bottle opening, so that a channel communicated with the inside and the outside of the bottle is formed by the groove formed by the compound liner reticle group and a gap of threads between the bottle cap and the bottle opening. Filling the bottle with a liquid with the viscosity of 1mPa×s, placing a composite liner in the bottle cap, screwing the bottle cap and the bottle mouth to be tightly matched, inverting the bottle, and ensuring that the bottle has no liquid leakage after 12 hours; the liquid in the bottle is changed into 500g of 10% sodium bicarbonate solution (accounting for 85% of the volume of the bottle), the bottle cap with the composite liner is tightly screwed and sealed immediately after 10g of sodium hydroxide solid is added, and the bottle body is observed after 12 hours, so that no bulge phenomenon exists. The bottle is dropped from the height of 1.2m, and the composite liner is free from damage and deformation.
The foregoing description is only an example to further illustrate the technical content of the present invention, so that the reader can easily understand the technical content, but the embodiments of the present invention are not limited thereto, and any technical extension or recreating according to the present invention is protected by the present invention.
Claims (9)
1. The pressure balance composite pad is characterized by comprising a bearing pad layer and a ventilation pad layer which are fixedly attached together, wherein a first perforation is arranged in the middle of the bearing pad layer, and a second perforation is arranged in the middle of the ventilation pad layer; the breathable cushion layer is provided with a groove from the edge of the second perforation to the outer edge of the breathable cushion layer, the length of the groove is 4-60mm, and the cross section area of the groove is 78-785400 mu m 2 ；
The breathable cushion layer is a PET layer or a PA layer or a modified PE layer; the modified PE layer is a PE film containing 0.5-10wt.% of titanium dioxide, and the particle size distribution of the titanium dioxide is between 0.08-2 mu m;
the gas permeable cushion is permeable to gas and prevents leakage of liquid.
2. The pressure balanced composite pad according to claim 1 further comprising a top pad layer, wherein the carrier pad layer, the gas permeable pad layer and the top pad layer are sequentially stacked and secured together.
3. A pressure balanced composite pad according to claim 2 wherein the central portion of the top pad layer is provided with a third perforation.
4. The pressure balanced composite pad according to claim 2 wherein the top cushion layer is comprised of at least one of cardboard, metal foil, foamed PE, PP and PVC.
5. The pressure balanced composite pad according to claim 1 wherein the load bearing cushion layer is a PE layer or a PP layer or a foamed PE layer.
6. The pressure balanced composite pad according to any one of claims 1 to 5 wherein the carrier pad and the gas permeable pad are both annular in shape with a ring width of 8 to 15mm; 20-40 grooves are formed in the breathable cushion layer, and the length of each groove is 8-12mm.
7. A method of making a pressure balanced composite pad according to claim 1 comprising the steps of:
s1, overlapping and fixing a first sheet for manufacturing a bearing cushion layer and a second sheet for manufacturing a ventilation cushion layer together to form a composite cushion substrate;
s2, manufacturing the cross section area of the second sheet material to be 78-785400 mu m 2 Is a groove of the mold;
s3, punching perforations on the composite gasket base material, forming first perforations on the first sheet material to form a bearing cushion layer, and forming second perforations on the second sheet material to form a ventilation cushion layer; the grooves on the second sheet are divided into two parts during punching and perforating, and the length of the grooves is 4-60mm.
8. The method for preparing a pressure balance composite pad according to claim 7, wherein the pressure balance composite pad further comprises a top pad layer, and the bearing pad layer, the air permeable pad layer and the top pad layer are sequentially overlapped and fixedly attached together;
in the step S1, a first sheet for manufacturing a bearing cushion layer, a second sheet for manufacturing a ventilation cushion layer and a third sheet for manufacturing a top cushion layer are overlapped and fixed together to form a composite cushion substrate; the first sheet is PE or PP; the second sheet is PET or PA or modified PE, the modified PE is a PE film containing 0.5-10wt.% of titanium dioxide, and the particle size distribution of the titanium dioxide is between 0.08-2 mu m; the third sheet material is composed of at least one material selected from paper board, metal foil, foaming PE, PP and PVC;
in the step S2, a groove is formed by engraving a line on the second sheet material by using a carbon dioxide laser to penetrate the first sheet material.
9. The method for producing a pressure-balanced composite gasket according to claim 7, wherein in the step S3, the composite gasket base material is die-cut into a ring shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810493729.5A CN108584160B (en) | 2018-05-22 | 2018-05-22 | Pressure balance composite liner and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810493729.5A CN108584160B (en) | 2018-05-22 | 2018-05-22 | Pressure balance composite liner and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108584160A CN108584160A (en) | 2018-09-28 |
| CN108584160B true CN108584160B (en) | 2023-10-20 |
Family
ID=63632425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810493729.5A Active CN108584160B (en) | 2018-05-22 | 2018-05-22 | Pressure balance composite liner and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108584160B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1268048B (en) * | 1966-02-25 | 1968-05-09 | Scott Plastics Corp | Sealing washer for container caps |
| CN2113775U (en) * | 1992-01-28 | 1992-08-26 | 重庆市沙坪坝区马家岩纸箱厂 | Sealed pad for medicine bottles |
| CN1148838A (en) * | 1994-03-31 | 1997-04-30 | 克劳罗克斯公司 | Bi-directional venting liner |
| CN1171764A (en) * | 1994-10-31 | 1998-01-28 | 克劳罗克斯公司 | Reverse channel bidirectional venting liner |
| TWM327850U (en) * | 2007-08-29 | 2008-03-01 | Shi An Packing Entpr Co Ltd | Gas-venting pad |
| CN205114023U (en) * | 2015-10-16 | 2016-03-30 | 杨建功 | Ventilative bottle lid |
| TWM550719U (en) * | 2017-06-19 | 2017-10-21 | Yarn Precision Technology Co Ltd | Improved structure of breathable cap |
| CN208412705U (en) * | 2018-05-22 | 2019-01-22 | 广州立白企业集团有限公司 | A kind of pressure balance composite pad |
-
2018
- 2018-05-22 CN CN201810493729.5A patent/CN108584160B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1268048B (en) * | 1966-02-25 | 1968-05-09 | Scott Plastics Corp | Sealing washer for container caps |
| CN2113775U (en) * | 1992-01-28 | 1992-08-26 | 重庆市沙坪坝区马家岩纸箱厂 | Sealed pad for medicine bottles |
| CN1148838A (en) * | 1994-03-31 | 1997-04-30 | 克劳罗克斯公司 | Bi-directional venting liner |
| CN1171764A (en) * | 1994-10-31 | 1998-01-28 | 克劳罗克斯公司 | Reverse channel bidirectional venting liner |
| TWM327850U (en) * | 2007-08-29 | 2008-03-01 | Shi An Packing Entpr Co Ltd | Gas-venting pad |
| CN205114023U (en) * | 2015-10-16 | 2016-03-30 | 杨建功 | Ventilative bottle lid |
| TWM550719U (en) * | 2017-06-19 | 2017-10-21 | Yarn Precision Technology Co Ltd | Improved structure of breathable cap |
| CN208412705U (en) * | 2018-05-22 | 2019-01-22 | 广州立白企业集团有限公司 | A kind of pressure balance composite pad |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108584160A (en) | 2018-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7527840B2 (en) | Flexible laminate having an integrated pressure release valve | |
| SK286476B6 (en) | Pressure-compensating device for a dual container | |
| US9868575B2 (en) | Flexible laminate having an integrated pressure-release valve | |
| JP2008162695A (en) | Partially reinforced air-sealing body and its manufacturing method | |
| JP2008013256A (en) | Air seal having enhanced airtight function | |
| JP2008087855A (en) | Air sealing object with reinforcing sealing function | |
| CN111788071B (en) | Flexible laminate with improved integrated pressure relief valve | |
| JP2016124549A (en) | Deaeration bag for food products | |
| CN108584160B (en) | Pressure balance composite liner and manufacturing method thereof | |
| CN110733752B (en) | Packaging sheet for discharging gas and food container including the same | |
| US9457953B1 (en) | Produce bag with selective gas permeability | |
| WO2015151260A1 (en) | Cap with check valve, pouring container comprising said cap with check valve, and production method for said cap with check valve | |
| CN208412705U (en) | A kind of pressure balance composite pad | |
| JPS62121062A (en) | Manufacture of ink cartridge for ink jet printer | |
| JP2019112093A (en) | Paper container for liquid and manufacturing method of the same | |
| JPH0976375A (en) | Paper cup container | |
| JP2011111191A (en) | Air cell cushioning material | |
| CN208746669U (en) | A kind of deoxidizer packing bag | |
| KR101709949B1 (en) | Expansion absorbing member May prevent freezing for Water meters cubage | |
| JP2020023353A (en) | Sealable lid film for gas discharge and food container sealed with sealable lid film | |
| CN213058345U (en) | PVC packaging sleeve film | |
| JPH10167335A (en) | Oxygen barrier packaging bag | |
| JP4010626B2 (en) | Packaging bag for desiccant | |
| JP2011157117A (en) | Package | |
| JP2017114532A (en) | Packaging material for deoxidizer and deoxidizer package |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |