CN108622536A - Bag - Google Patents
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- Publication number
- CN108622536A CN108622536A CN201710178028.8A CN201710178028A CN108622536A CN 108622536 A CN108622536 A CN 108622536A CN 201710178028 A CN201710178028 A CN 201710178028A CN 108622536 A CN108622536 A CN 108622536A
- Authority
- CN
- China
- Prior art keywords
- bag
- layer
- thickness
- film
- low density
- 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.)
- Pending
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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
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Bag Frames (AREA)
Abstract
The present invention provides a kind of bag, which is made of multi-layer film structure comprising：(A) polyester layer, (B) Biaxially-oriented polyethylene layer and (C) low density polyethylene layer, wherein (B):(C) thickness ratio is 1:1~1:2.4.
Description
Technical field
The present invention relates to bags, are especially used for the packaging bag of packaging flowable materials.
Background technology
In China, mainly polybag is used to constitute the plastics as the outer packaging bag of flowable materials (for example, washing powder)
The base material of the film of bag mainly uses polyethylene (PE).Common bag thickness is generally all set to thicker, is wanted with reaching intensity
It asks.For example, as shown in Figure 1, the polybag constituent material of the prior art is to bond polyethylene terephthalate by adhesive layer DD
Made of ester (PET) layer AA (for example, thickness is 12 μm) and low density polyethylene (LDPE) (LDPE) layer CC (for example, thickness is 100 μm)
Composite membrane.However, thickness is thicker to mean that used thin-film material is more, not environmentally.And with the increasing of people's environmental consciousness
By force, it is desirable to reduce the discharge of the carbon dioxide caused by packaging material.Therefore, it is necessary to study more advanced technology to be constituted to reduce
The thickness of the film of bag.
A kind of bag for packaging flowable materials is disclosed in patent document 1, it includes polymer composition layer, line styles
Ethylene copolymer layer and high pressure polyethylene layer, wherein polymer composition layer includes by ethylene and at least one C3-C18 α-
The mixture and vinyl-vinyl acetate copolymer of linear ethylene copolymers and high pressure low density made of olefin-copolymerization.But
It is that the thickness that the film for constituting bag is reduced while ensureing the intensity of bag is not referred in the patent document.
Patent document
Patent document 1：CN1246099A
Invention content
The present invention makes in view of above-mentioned problems of the prior art, and main purpose is that providing one kind both protected
It demonstrate,proves the intensity of bag simultaneously and reduces the bag of the thickness for the film for constituting bag.
To achieve the goals above, bag of the invention is made of the multi-layer film structure comprising following (A)~(C) layers：(A)
Polyester layer, (B) Biaxially-oriented polyethylene layer, (C) low density polyethylene layer, wherein (B):(C) thickness ratio is 1:1~1:
2.4。
The present invention is by the way that (A), (B) and (C) layer to be used cooperatively with certain proportion, even if to reduce the use of thin-film material
Amount reduces thickness, can also take into account intensity and environmental requirement.
The beneficial effects of the invention are as follows：It is capable of providing the film that a kind of intensity not only having ensured bag simultaneously reduces composition bag again
The bag of thickness.
Description of the drawings
Fig. 1 is the cross section structure schematic diagram of the composition film of the bag of an example of the prior art.
Fig. 2 is the cross section structure schematic diagram of the composition film of the bag of an embodiment of the invention.
Fig. 3 is the structural schematic diagram of the bag of an embodiment of the invention.
Fig. 4 is the oblique view of the erecting packing bag of an embodiment of the invention.
Fig. 5 is the layer structural section structure chart near the engaging zones of the bag of an embodiment of the invention.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with attached drawing.
Fig. 2 is the cross section structure schematic diagram of the composition film of the bag of an embodiment of the invention.Fig. 3 is the one of the present invention
The structural schematic diagram of the bag of a embodiment.Fig. 4 is the oblique view of the erecting packing bag of an embodiment of the invention.Fig. 5
It is the layer structural section structure chart near the engaging zones of the bag of an embodiment of the invention.
The bag of present embodiment includes：(A) polyester layer, (B) Biaxially-oriented polyethylene (BOPE) layer, (C) low density polyethylene
Alkene (LDPE) layer, wherein (B):(C) thickness ratio is 1:1~1:2.4.Between polyester layer A and Biaxially-oriented polyethylene layer B
And there is adhesive layer D between Biaxially-oriented polyethylene layer B and low density polyethylene layer C.
The constituent material of the polyester layer A of the bag of present embodiment can be polyethylene terephthalate (PET), poly- pair
Benzene dicarboxylic acid trimethylene glycol ester (PTT), polybutylene terephthalate (PBT) etc.；Preferably pet layer.
The constituent material of the adhesive layer D of the bag of present embodiment is preferably polyurethanes adhesive.
From the viewpoint of not only ensure that the intensity of bag reduces the thickness of film of composition bag simultaneously again, preferred present embodiment
Bag polyester layer A thickness be 10~25 μm, more preferably 10~15 μm, further preferably 11~13 μm.
From the viewpoint of not only ensure that the intensity of bag reduces the thickness of film of composition bag simultaneously again, preferred present embodiment
Bag Biaxially-oriented polyethylene layer B thickness be 20~50 μm, more preferably 20~30 μm, further preferred 23~27 μm.
From the viewpoint of not only ensure that the intensity of bag reduces the thickness of film of composition bag simultaneously again, preferred present embodiment
Bag low density polyethylene layer C thickness be 20~60 μm, preferably 25~60 μm, more preferably 30~60 μm.It is common
Bag generally reaches intensity requirement by using low density polyethylene (LDPE).And in the present embodiment, even if reducing low density polyethylene
The dosage of alkene can also keep good intensity, take into account intensity and environmental requirement.
From the viewpoint of not only ensureing the intensity of bag simultaneously but also reducing the thickness for the film for constituting bag, the bag of present embodiment
Biaxially-oriented polyethylene layer B and low density polyethylene layer C thickness ratio (B):(C) it is 1:1~1:2.4, preferably 1:1.2~
1:2.4.Present embodiment is by the way that (A) of bag, (B) and (C) layer to be used cooperatively with certain proportion, even if to reduce film material
The dosage of material reduces thickness, can also take into account intensity and environmental requirement.
From the viewpoint of not only ensure that the intensity of bag reduces the thickness of film of composition bag simultaneously again, preferred present embodiment
Bag layer A, layer B and layer C overall thickness be 50~110 μm, preferably 60~100 μm, more preferable 62~97 μm, further preferably
It is 67~97 μm.
Big packaging bag generally to intensity requirement higher, even and if the bag of present embodiment is used as high-capacity packaging bag,
Also good intensity, and meet the requirement of environmental protection can be kept.It is preferred that the bag of present embodiment can be used for 1500~4000g's of filling
Content.
The composition film of the bag of present embodiment can be manufactured by dry-lamination process etc..Specifically, can be：
First by the first base material of polyester layer A by adhesive be coated with it is compound with the second base material Biaxially-oriented polyethylene layer B, then will more than
Obtained double-layer structure is re-used as new base material and is coated with by adhesive, is carried out with third base material low density polyethylene layer C compound.
The bag of present embodiment can be engaging back (3-1), top (3-2) by above-mentioned composition film in a manner of sealing
It is made with lower part (3-3), structure can be bag as shown in Figure 3, can also be as side shown in Fig. 4 (a) or 4 (b) is attached
There is the erecting packing bag (4-A or 4-B) of rivel (4-1).In addition, the bag of present embodiment can be as shown in Figure 5 by will be above-mentioned
The low density polyethylene layer C of film is constituted to be fabricated with overlapped state formation engaging zones.
The bag of present embodiment can be used for packaging flowable materials, such as washing powder, liquid detergent, grain, feed for pet etc..
The preferred embodiment of the present invention is illustrated above, but the present invention is not limited to above-mentioned embodiments；This
Field technology personnel are without departing from spirit of the invention, so that it may to carry out various modifications to above-mentioned embodiment.
Embodiment
The present invention is further illustrated by the following examples, but the present invention is not limited to following embodiments.
Embodiment 1
(manufacture of the constituent material of bag)
Dry multiple preceding preparation is carried out first, is opened motor exhaust, is opened steam drying switch, adjust scraper angle,
Low-speed running is laminated heating roller heating, and upper glue roller smooth roll is depressed in adjustment EPC deviation correcting devices position successively, and adjusts each roller speed
Degree, each position tension, pressure and temperature.
It will be as the first base material of polyester layer A (12 μm of thickness) and as the second base material (layer of Biaxially-oriented polyethylene layer B
It is 25 μm thick) on roll up, open machine, the first base material carries out adhesive by upper glue roller and (is used as adhesive layer D, is selected from polyurethane sticking
Agent) coating, steam channel is then entered by smooth roll respectively and is dried.Then the first base material and the second base material are being laminated
Heating part be laminated compound, is finally wound.Then double-layer structure derived above new base material is re-used as to enter
Dry to answer a pager's call, double layer substrates carry out adhesive (being used as adhesive layer D, be selected from polyurethane binder) coating by upper glue roller, with conduct
The third base material (30 μm of thickness) of low density polyethylene layer C carries out dry multiple.Obtain the constituent material of the bag of embodiment 1.
To the constituent material of the bag of the embodiment 1 obtained as described above, carries out every intensity according to following test method and survey
Examination, result is summarised in together in table 1.Every test below is all in temperature 23 (± 2) DEG C, the ring of 45~55%RH of humidity
It is carried out in border.
(strength test)
(1) peel strength
It is detected according to following methods：
1) wide 15 ± 1mm, long 200mm sample strips vertically and horizontally each 5 are taken；
2) one layer in three layers of composite layer of a wherein sample is peeled off into 50mm in advance with base material；
3) both ends of sample Stripped portions are clipped in the upper and lower fixture of cupping machine with graphic recording device respectively
On, it is T-shaped；
4) it is pulled open with the speed of 300mm/min；
5) peak load (unit when fracture is read：N/15mm)；
6) another layer in three layers of composite layer of the sample is peeled off into 50mm in advance with base material；
7) repetition is above-mentioned 3)~5) step；
8) take remaining four sample, repetition above-mentioned 2)~7) step.
When the test result of the peel strength of 5 samples reaches established standards (>=2N/15mm), then it is considered as qualification.
(2) pull-off force and elongation at break
It is detected according to following correlation technique：
1) wide 15 ± 1mm, length >=150mm sample strips vertically and horizontally each 3 are taken；
2) a wherein sample is fixed on the fixture of the cupping machine with graphic recording device, is in a straight line,
Spacing 50mm in the middle part of sample；
3) setting tensile speed is 200mm/min；
4) maximum pull (unit when fracture is read：) and elongation (unit N/15mm：%)；
5) take remaining 5 sample, repetition above-mentioned 2)~4) the step of.
When the pull-off force of each 3 samples and the test result of elongation at break in length and breadth reach established standards (pull-off force >=
55N/15mm, elongation at break >=105%) more than when, then be considered as qualification.
(3) puncture-resistant intensity
It is detected according to following methods：
1) test piece is divided into two groups, every group 5 by the test piece 10 for taking diameter 100mm；
2) a piece of test piece is taken to be mounted on sample film clamping ring from first group；
3) draw point for being 0.5mm with a diameter of 1.0mm and spherical tips radius, with the speed of 50 ± 5mm/min by introversion
It is outer top thorn it is above-mentioned 2) in test piece；
4) peak load (unit that draw point penetrates test piece is read：N)；
5) take remaining four test piece in the group, repetition above-mentioned 2)~4) step；
6) a piece of test piece is taken to be mounted on sample film clamping ring from second group；
7) draw point for being 0.5mm with a diameter of 1.0mm and spherical tips radius, with the speed of 50 ± 5mm/min by extroversion
It is interior top thorn it is above-mentioned 6) in test piece；
8) peak load (unit that draw point penetrates test piece is read：N)；
9) take remaining four test piece in the group, repetition above-mentioned 6)~8) step.
When the test result that the draw point of test sample penetrates the peak load of test piece reaches established standards (>=28N) or more
When, then it is considered as qualification.
Embodiment 2
Other than being adjusted to the thickness of each layer of A, B, C as shown in table 1, is manufactured and tested similarly to Example 1.
As a result it is summarised in together in table 1.
Embodiment 3
Other than being adjusted to the thickness of each layer of A, B, C as shown in table 1, is manufactured and tested similarly to Example 1.
As a result it is summarised in together in table 1.
Table 1
As shown in Table 1, the overall thickness of the film of the composition bag of Examples 1 to 3 is 62~97 μm, with the prior art
Compared to reducing thickness.The peel strength of the constituent material of the bag of Examples 1 to 3 all reaches 2.3~7.3N/15mm, pull-off force
All reach 58~95N/15mm, elongation at break all reaches 105~143%, and puncture strength all reaches 28~39N.It follows that
The bag of Examples 1 to 3 all not only ensure that the intensity of bag simultaneously but also reduce the bag of the thickness for the film for constituting bag.
Claims (8)
1. a kind of bag, which is made of the multi-layer film structure comprising following (A)~(C) layers：
(A) polyester layer,
(B) Biaxially-oriented polyethylene layer,
(C) low density polyethylene layer,
Wherein, (B):(C) thickness ratio is 1:1~1:2.4.
2. bag as described in claim 1, wherein
(A), the overall thickness of (B) and (C) are 60~100 μm.
3. bag as described in claim 1, wherein
(A), the overall thickness of (B) and (C) are 62~97 μm.
4. bag as described in claim 1, wherein
(A), the overall thickness of (B) and (C) are 67~97 μm.
5. bag as described in claim 1, wherein
(C) thickness of low density polyethylene layer is 20~60 μm.
6. bag as described in claim 1, wherein
(C) thickness of low density polyethylene layer is 25~60 μm.
7. bag as described in claim 1, wherein
(C) thickness of low density polyethylene layer is 30~60 μm.
8. bag according to any one of claims 1 to 3, wherein
The bag is used to fill the content of 1500~4000g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710178028.8A CN108622536A (en) | 2017-03-23 | 2017-03-23 | Bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710178028.8A CN108622536A (en) | 2017-03-23 | 2017-03-23 | Bag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108622536A true CN108622536A (en) | 2018-10-09 |
Family
ID=63707363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710178028.8A Pending CN108622536A (en) | 2017-03-23 | 2017-03-23 | Bag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108622536A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1206373A (en) * | 1995-12-05 | 1999-01-27 | 陶氏化学公司 | Novel pouches for packaging flowable materials in pouches |
| CN101035717A (en) * | 2004-10-01 | 2007-09-12 | 旭化成派克斯株式会社 | Pillow packaging bag, pillow type packaging body, heat seal bar for pillow packaging machine, and pillow packaging machine |
| CN101117036A (en) * | 2006-07-31 | 2008-02-06 | 陶氏全球科技股份有限公司 | Layered film combination, packaging made by the layered film combination and use method thereof |
| CN101863336A (en) * | 2010-06-11 | 2010-10-20 | 上海紫江彩印包装有限公司 | Flexible laminated material packaging bag |
| CN201745868U (en) * | 2010-06-11 | 2011-02-16 | 上海紫江彩印包装有限公司 | Packaging bag made of flexible laminated material |
| CN102029754A (en) * | 2010-09-21 | 2011-04-27 | 昆山加浦包装材料有限公司 | High barrier coextruded stretch film |
-
2017
- 2017-03-23 CN CN201710178028.8A patent/CN108622536A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1206373A (en) * | 1995-12-05 | 1999-01-27 | 陶氏化学公司 | Novel pouches for packaging flowable materials in pouches |
| CN101035717A (en) * | 2004-10-01 | 2007-09-12 | 旭化成派克斯株式会社 | Pillow packaging bag, pillow type packaging body, heat seal bar for pillow packaging machine, and pillow packaging machine |
| CN101117036A (en) * | 2006-07-31 | 2008-02-06 | 陶氏全球科技股份有限公司 | Layered film combination, packaging made by the layered film combination and use method thereof |
| CN101863336A (en) * | 2010-06-11 | 2010-10-20 | 上海紫江彩印包装有限公司 | Flexible laminated material packaging bag |
| CN201745868U (en) * | 2010-06-11 | 2011-02-16 | 上海紫江彩印包装有限公司 | Packaging bag made of flexible laminated material |
| CN102029754A (en) * | 2010-09-21 | 2011-04-27 | 昆山加浦包装材料有限公司 | High barrier coextruded stretch film |
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