JP2023536181A - Containers containing laminates of polyethylene - Google Patents

Abstract

A container is provided that includes a laminate, the laminate comprising a first layer of machine direction oriented polyethylene (MDO-PE), a second layer of biaxially oriented polyethylene (BO-PE), and a second layer of polyethylene (PE). A third layer.

Description

The present application relates to containers comprising laminates of polyethylene.

Plastic packaging, including rigid bottles and flexible bags (also referred to herein as pouches), is widely used in a variety of applications. One of the most important requirements for plastic packaging, especially robust plastic packaging of products such as detergent powders or liquids, is the mechanical strength of the thermoplastic material used to prepare the plastic packaging. , because the plastic packaging must withstand some impact and maintain the integrity of the packaging until the end of the product's use. To assess whether plastic packaging is robust enough to contain the contents therein, several tests are used to measure mechanical performance. The most common tests include tensile strength, seal strength and drop test. Tensile strength testing measures how much tensile stress causes a plastic film to break. Seal strength testing measures how much tensile stress causes the seal of a plastic packaging (such as a flexible bag) to break. A drop test measures the overall robustness of a plastic packaging by dropping it from a certain height and then checking if any leaks occur.

In particular, Stand Up Pouches (SUPs) with bottom gusset features are one of the most widely used flexible packages and are typically Typically used to contain powders or liquids of products such as in the fabric care sector. Such pouches have very high mechanical performance requirements to prevent leakage due to drops from height or storage with other objects throughout the product life cycle. In this case, the choice of thermoplastic materials used to prepare such plastic packaging is very limited as most thermoplastic materials cannot provide the required sufficient mechanical strength. be done. Additionally, laminates comprising two or more layers of thermoplastic material are commonly used to meet mechanical strength requirements. Currently, commercial laminates that can pass the drop test of detergent pouches include polyethylene terephthalate/polyethylene (PET/PE) laminates, polyamide/polyethylene (PA/PE) laminates. body, PET/PA/PE laminates, and PET/vacuum metallized PET/PE laminates. However, none of these laminates are recyclable as they contain at least two different thermoplastic polymers. Therefore, there is a need to develop laminates that have sufficient mechanical strength and are recyclable.

Polyethylene (PE) is a common thermoplastic polymer for plastic packaging. However, PE films generally have lower mechanical strength and heat resistance compared to other thermoplastic polymer films such as PET and PA. Recently, some new types of PE films, such as oriented PE films, have been developed to improve the mechanical properties of PE films. However, prior to the present invention, there are no known pouches made from monopolymer PE laminates that can pass drop tests under heavy loads exceeding 1 kg, especially for liquid products. Therefore, plastic packaging such as stand-up pouches (SUP) made of monopolymer PE laminates remains technically challenging for rugged applications (especially drop tests) for liquids.

The present disclosure provides a first layer of machine direction oriented polyethylene (MDO-PE), a second layer of biaxially oriented polyethylene (BO-PE) and a layer of polyethylene (PE). Of the above needs, based on the surprising discovery that a monopolymer PE laminate comprising a third layer can provide sufficient mechanical strength, in particular to pass drop tests satisfy one or more of Furthermore, laminates according to the present disclosure may be recyclable as the laminate is a monopolymer PE laminate, i.e. the main thermoplastic polymer in the laminate is PE.

In one aspect, the present disclosure provides a container comprising a laminate comprising a first layer of MDO-PE, a second layer of BO-PE, and a third layer of PE. include.

In another aspect, the present disclosure provides a laundry detergent bag containing 0.1 kg to 3 kg of laundry detergent, comprising a first layer of MDO-PE, a second layer of BO-PE, and a second layer of PE. A laundry detergent bag is provided which is constructed from a laminate including three layers.

In a further aspect, the present disclosure provides a laminate that includes a first layer of MDO-PE, a second layer of BO-PE, and a third layer of PE.

It is an advantage of the laminate to have sufficient mechanical strength to prevent leakage due to dropping from height, storage of contents or impalement with sharp objects.

Another advantage of the laminate is that it can pass the drop test for detergent stand-up bags.

Another advantage of laminates is the ability to create containers for recyclable detergent powders or liquids.

Another advantage of laminates is that they allow for good heat sealing between two laminates according to the present disclosure.

These and other features, aspects and advantages of particular embodiments will become apparent to those of ordinary skill in the art upon reading this disclosure.

The embodiments described in the drawings are exemplary in nature and are not intended to limit the invention as defined by the claims. The detailed description of the exemplary embodiments below can be understood by reading in conjunction with the following drawings.
1 illustrates one embodiment of a laminate according to the present disclosure; 4 illustrates another embodiment of a laminate according to the present disclosure;

The following description provides a broad description of a number of different embodiments of the disclosure. This description is to be construed as illustrative only and is intended to describe all possible embodiments, as it would be impractical, if not impossible, to describe all possible embodiments. isn't it. Any feature, characteristic, component, composition, ingredient, product, step or methodology described herein may be superseded by any other feature, characteristic, component, composition, component described herein. , products, steps or methodologies may be combined with, or replaced in whole or in part by them. Numerous alternative embodiments could be implemented, using either current technology or technology developed after the filing date of this patent, and such embodiments would still be covered by the claims. will be included within the scope of All publications and patents cited in this specification are hereby incorporated by reference.

The present disclosure relates to a container comprising a laminate, the laminate comprising a first layer of MDO-PE, a second layer of BO-PE and a third layer of PE. The total thickness of laminates according to the present disclosure can be 70 microns to 400 microns, preferably 100 microns to 350 microns, more preferably 120 microns to 300 microns, and most preferably 140 microns to 250 microns. In particular, the first layer may have a thickness of 5 microns to 50 microns, preferably 10 microns to 45 microns, more preferably 15 microns to 40 microns, most preferably 20 microns to 30 microns, and/or The second layer may have a thickness of 5 microns to 50 microns, preferably 8 microns to 45 microns, more preferably 12 microns to 40 microns, most preferably 15 microns to 25 microns; layer may have a thickness of 10 microns to 250 microns, preferably 30 microns to 230 microns, more preferably 100 microns to 200 microns, most preferably 120 microns to 160 microns.

Preferably, the container may be recyclable. More preferably, laminates according to the present disclosure may contain no more than 10 wt%, preferably no more than 7 wt%, more preferably no more than 5 wt%, and most preferably no more than 3 wt% non-PE thermoplastic polymer.

Preferably, laminates according to the present disclosure have a machine-direction can have a tensile strength along

Preferably, laminates according to the present disclosure have a lateral tensile strength of greater than 100 N/inch, preferably greater than 120 N/inch, more preferably greater than 130 N/inch, most preferably greater than 140 N/inch, measured by the method according to Test 2. and/or preferably the laminate according to the present disclosure is greater than 70 N/inch, preferably greater than 80 N/inch, more preferably greater than 90 N/inch as measured by the method according to Test 3 may have a seal strength at the side seal of greater than 100 N/inch, most preferably greater than 100 N/inch; , preferably greater than 80 N/inch, more preferably greater than 90 N/inch, most preferably greater than 100 N/inch, at the bottom seal.

Preferably, a container according to the present disclosure may be a flexible bag (also called a "pouch"), preferably a flexible stand-up bag. As used herein, the terms "stand-up bag," "Stand Up Bag," or "Stand Up Pouch" shall not be used by any external article. Refers to a bag that has a bottom gusset feature that allows the bag to stand up without being supported. In particular, a container according to the present disclosure may be a flexible bag with a spout, preferably a flexible stand-up bag with a spout.

As used herein, the term "spout" encompasses a capped or uncapped spout assembly, specifically a spout comprising a spout body and preferably a spout. a cap separable from the body. The spout may have any suitable size, for example with a diameter of 0.5 cm to 10 cm. The spout may be located at any suitable location, in particular the spout may be located at the top edge, e.g., near the midpoint of the top edge (i.e., the top spout pouch ), or may be located near the connection point between the top edge and the first side edge (ie, a corner spout pouch). The spout may have a center of gravity. A spout may have one or more features. As used herein, the term "feature" means any structural characteristic. The spout can be manufactured by any suitable process such as injection molding, compression molding, blow molding, and the like. And the spout can be made from a polyolefin such as PE or PP, preferably HDPE, more preferably a blend of HDPE and LLDPE.

Preferably, the container holds between 0.05 kg and 10 kg, preferably between 0.1 kg and 5 kg, more preferably between 0.2 kg and 3 kg of product, such as 0.1 kg, 0.2 kg, 0.3 kg, 0.4 kg, 0.4 kg, It can contain 5 kg, 1 kg, 2 kg, 3 kg, 4 kg, 5 kg, or any range thereof. More preferably, the product may be selected from the group consisting of fabric care products, home care products, hair care products, beauty care products and personal care products, preferably laundry detergent products, more preferably granular laundry detergents or liquid laundry detergents. is.

The layers in laminates according to the present disclosure may be arranged in any order. Preferably, the layers in a laminate according to the present disclosure may be arranged from outside to inside in the order i), ii), iii) or in the order ii), i), iii) . In the context of this disclosure, the term "inside" refers to the side of the laminate within the packaging (e.g., flexible bag) facing the contents (e.g., detergent solution) contained within the packaging. , the term "outer" refers to the side of the laminate that is opposite the inner side.

Overall laminates and layers within laminates according to the present disclosure may have different initial sealing temperatures as measured by the method according to Test 4. In particular, the overall laminate according to the present disclosure has an initial sealing temperature of 125°C or less, preferably 120°C or less, more preferably 118°C or less, most preferably 115°C or less, measured by the method according to Test 4. The first layer may have an initial sealing temperature of at least 130°C, preferably at least 135°C, more preferably at least 140°C, most preferably at least 145°C, as measured by the method according to Test 4.

In another aspect, the present disclosure is a bag containing 0.05 kg to 10 kg, preferably 0.1 kg to 5 kg, more preferably 0.2 kg to 3 kg of laundry detergent, wherein a first layer of MDO-PE and a second layer of BO-PE and a third layer of PE.

In a further aspect, the present disclosure provides a laminate that includes a first layer of MDO-PE, a second layer of BO-PE, and a third layer of PE. 1-2 illustrate embodiments of laminates according to the present disclosure.

FIG. 1 shows a laminate 1 comprising a first layer 11 of MDO-PE, a second layer 12 of BO-PE and a third layer 13 of PE, the adhesive between the layers being Not shown.

FIG. 2 shows a laminate 1 comprising a second layer 21 of BO-PE, a second layer 22 of MDO-PE and a third layer 23 of PE, the adhesive between the layers being Not shown.

Polyethylene (“PE”)
The laminates of the present disclosure contain polyethylene (PE) as the primary thermoplastic polymer (ie, PE-based laminates). Preferably, then, the PE component may comprise one or more segments (or sub-segments) of PE polymer. PE is generally high-density polyethylene (HDPE, densities above 0.941 g/cc), medium-density polyethylene (MDPE, densities between 0.926 and 0.940 g/cc), low-density (low-density polyethylene, LDPE, density of 0.910-0.925 g/cc), and linear low-density polyethylene (LLDPE, density of 0.910-0.925 g/cc) being classified. See, eg, ASTM D4976-98: Standard Specification for Polyethylene Plastic Molding and Extrusion Materials. These PE divisions can then be further divided into monomodal or multimodal (eg, bimodal) subdivisions.

One of the major uses of polyethylene (HDPE, LLDPE, and LDPE) is in film applications such as shopping bags, liners for institutional and consumer trash cans, merchandise bags, transportation bags, food packaging films, Multilayer bags, liners, vegetable bags, stretch wraps, shrink wraps, and the like. Important physical properties of PE-based film layers include tear strength, impact strength, tensile strength, stiffness, and transparency. Different combinations of PE sections and subsections are used herein depending on the application and/or desired film properties. In some embodiments, the PE component in laminates of the present disclosure will include some level of linear low density polyethylene (LLDPE) polymer.

At least one layer of the film comprises a PE component of 70% to 99% by weight of the at least one layer of the film. Preferably, at least one layer of the film comprises a PE component of 75% to 98%, more preferably 80% to 95%, even more preferably 82% to 93% by weight of the at least one layer. include. The PE component has at least one PE polymer, optionally two or more PE polymers. At least one layer of the film comprises from 70% to 99% by weight of the at least one layer of at least one PE polymer of the PE component. Preferably, at least one layer of the film comprises from 75% to 98%, more preferably from 80% to 95%, even more preferably from 82% to 93% by weight of the at least one layer of PE component at least one PE polymer of

In some embodiments, at least one film layer comprises LLDPE polymer from about 1% to about 100% by weight of the PE component. More preferably, the LLDPE is from 25 wt% to 100 wt% (in at least one film layer), alternatively from 25 wt% to 90 wt%, even more preferably from 30 wt% to 100 wt%, and More preferably, the LLDPE is more than 50 wt%, preferably more than at least 60 wt%, more preferably more than at least 70 wt% of the PE component.

In some embodiments, at least one film layer comprises HDPE or MDPE polymer from 1% to 100% by weight of the PE component. More preferably, HDPE or MDPE comprises 10 wt% to 80 wt%, alternatively 20 wt% to 60 wt%, even more preferably 30 wt% to 50 wt% of PE (in at least one film layer). is an ingredient.

Suitable suppliers/products of PE include Dowlex(TM) from Dow Chemical and Borstar(TM) from Borealis and Borouge and Enable(TM) from Exxon Mobile.

Machine Direction Oriented Polyethylene (MDO-PE)
The laminates of the present disclosure include layers of machine direction oriented polyethylene (MDO-PE). The machine direction (MD) is also known as the longitudinal direction (generally the direction perpendicular to the traverse direction (TD)). MD orientation is the preferred initial stage after the unconverted film is formed. During MD orientation, the unconverted film from the blown line or cast line is heated to orientation temperature via one or more hot rollers. The heated film is fed to slow draw rolls with nip rollers having the same rolling speed as the heated rollers. The film then enters the high speed draw rolls. The high speed draw rolls have a speed 2-10 times that of the low speed draw rolls and can effectively draw the film continuously. There may be another high speed draw roll that is even faster than the first high speed draw roll so that the film undergoes two stages of drawing. Between the two draw stages there is another set of heated rolls that set the temperature of the film after the first draw and before the second draw. The temperatures in these two drawing stages can be the same or different. Orientation may be a single draw instead of a two draw.

The total MD draw ratio is 2:1 to 10:1, more preferably 3:1 to 9:1, even more preferably 5:1 to 8:1. The total MD draw ratio includes all orientation stages. For example, if a two stage orientation is used with a first draw ratio of 2:1 and a second draw ratio of 3:1, then the total draw ratio is 6:1.

The orientation temperature in MD orientation is about 50°C to less than 140°C, preferably less than 130°C, more preferably less than 120°C, alternatively 60°C to 120°C, or less than 115°C, or 70°C to 115°C. . The temperature also depends on the processing speed. Higher processing speeds generally require higher temperatures due to the relatively short contact time between the film and the hot rollers. Slower processing rates require relatively low temperatures due to longer contact times.

A typical thickness of the MDO-PE layer has a thickness of 5 microns to 50 microns, preferably 10 microns to 45 microns, more preferably 15 microns to 40 microns, most preferably 20 microns to 30 microns.

Biaxially oriented polyethylene (BO-PE)
The laminates of the present disclosure include layers of biaxially oriented polyethylene (BO-PE). BO-PE film is a film stretched in both MD and TD, resulting in molecular chain orientation in two directions. One of the common processes for preparing BO-PE is a sequential process, in which a thick extruded sheet is heated to its softening point (not melting point) and machined using heated rollers. It is mechanically stretched in the direction and subsequently stretched in the transverse direction, ie perpendicular to the direction of travel, in a heated oven. It is also possible to stretch the film in both directions simultaneously, but the equipment required for this is somewhat more complex. In particular, BO-PE can be produced by a tubular process in which tubular cells are expanded, or a tenter frame process in which a thick extruded sheet is heated to its softening point (not melting point) and mechanically stretched. Biaxially oriented polyethylene film processes are disclosed, by way of example, in WO201270373A1, US10363700B2, and US6689857B1.

The MD draw ratio can be from 4.5:1 to 6:1 and the TD draw ratio can be from 7:1 to 8:1, but these ratios are fully adjustable.

A typical thickness of the BO-PE layer has a thickness of 5 microns to 50 microns, preferably 8 microns to 45 microns, more preferably 12 microns to 40 microns, most preferably 20 microns to 40 microns.

Test method Test 1. Drop Test The drop test performed in this disclosure is based on the Neyer drop test as follows.

Thirty filled pouches are subjected to free-fall experiments from heights ranging from 73.9 cm to 182 cm. Specifically, every single pouch was dropped from a height of 73.9 cm 4-5 times (2 at the base, 1 at the front, 1 at the back, and 1 at the spout (must be facing downwards during the drop). If not)) Drop it and see if it passes (no leaks) or fails. If it can pass at a height of 73.9 cm, the free fall experiment is repeated from increased height to a height of 182 cm or until it fails at some height. The allowable height is calculated by the average maximum height minus 3 standard deviations for a total of 30 results. The success criterion is >/= 1.0 meter height tolerance. The test conditions are room temperature (25° C.).

Test 2. Tensile Strength Test Tensile strength is measured on an Instron tensile tester at room temperature along both the machine and transverse directions. Samples are obtained by cutting the body or bottom of the pouch into film strips having a width of 25.4 mm and a length of 250 mm. The moving speed of the tensile tester (crosshead) is 300 mm/min. The breaking force of each film strip is recorded as the result, tensile strength along the machine direction and tensile strength along the transverse direction.

Test 3. Seal Strength Test Seal strength is also measured with an Instron tensile tester at room temperature. Samples are obtained by cutting the sealed laminate into film strips with a width of 25.4 mm at different positions on the pouch. For the side seal, samples were obtained at 6 different positions (3 left, 3 right) and for the bottom seal, 6 different positions (3 front, 3 rear). Obtain a sample. The moving speed of the tensile tester (crosshead) is 300 mm/min. The average separation force of the film strip from both the different positions of the side seals and the different positions of the bottom seals is recorded as the result, namely the seal strength of the side seal and the seal strength of the bottom seal. .

Test 4. Measurement of initial sealing temperature Initial sealing temperature is measured by hot tack equipment (Testing Machines Inc. (New Castle-Delaware , USA) manufactured by SL-10). The sample is heated on the instrument under 4 bar for 0.72 seconds by using different temperatures (starting from a relatively low temperature) to determine if it can be sealed. If sealing fails, repeat the test at a higher temperature. The minimum temperature interval for this instrument can be 1°C. If the sample can be sealed starting from a certain temperature, record such temperature as the initial sealing temperature.

Example 1. Drop Test of Stand-Up Pouches with Monopolymer PE Laminates Pouches were made using different monopolymer PE laminates (MDO-PE and PE for 1, BO-PE and PE for comparative laminate 2), respectively. Each laminate was prepared by dry lamination, in which the adhesive was applied onto one layer of film, allowed to dry, and then another layer of film was placed on the adhesive surface to form a bond. For the three-layer construction, the same process was again applied between the third layer of film and the two-layer laminate. The specific structures of Laminate 1 and Comparative Laminates 1 and 2 are shown in Table 1 below. The initial sealing temperatures of MDO-PE, BO-PE and PE are above 155°C, above 125°C and above 125°C, respectively, as measured by the method according to test 4.

By using Laminate 1 and Comparative Laminates 1 and 2, stand-up pouches (SUP) were made. The SUP contained three panels, a front panel, a rear panel and a bottom panel. The pouch making process included film slitting, body panel (front and back panel) two-side sealing, bottom panel two-side sealing, gusset four-side sealing, and gusset punching. Specifically, the bottom panel was a rectangle that could be folded horizontally at its centerline. Two edges along the long sides of the bottom panel were sealed with front and rear panels, respectively. In the gusset portion, two-side sealing of the body panel and four-side sealing of the gusset portion were simultaneously formed. The SUP was made by using a Tiemin pouch making machine (sealing temperature: 125-130° C. and sealing pressure: 3-4 bar) manufactured by Tiemin (Wuxi, China).

The pouches made from Laminate 1 and Comparative Laminates 1 and 2 had the same design, that of Ariel Japan, 1.35 kg of strong detergent solution (pouch size was 198 mm). width, height of 272 mm, gusset depth of 55 mm). The MDO-PE and BO-PE films used in all these laminates were identical. The blown PE used across all these laminates was the same PE composite, differing only in thickness. Pouches for all three laminates were formed on the same pouch making machine. Pouches were successfully prepared using Laminate 1 and Comparative Laminate 1, but the pouches could not be heat sealed without sealing problems, so Comparative Laminate 2 was used to make the pouches. could not. In particular, the pouches of Comparative Laminate 2 were either poorly sealed, leaving weak or open seals, or were oversealed with seals that were significantly wrinkled or charred. . No operating windows were found on the pouch making machine. Water was filled with a target fill weight of 1.36 kg.

1: Huangshan Novel Co.; , Ltd. (Huangshan, Anhui, China) MDO-PE
2: Guangdong Decro Film New Materials co. , ltd. BO-PE manufactured by (Foshan, Guangdong, China)
3: Huangshan Novel Co.; , Ltd. Blown PE manufactured by (Huangshan, Anhui, China)
4: Huangshan Novel Co.; , Ltd. Blown PE manufactured by (Huangshan, Anhui, China)
5: Total thickness includes thickness of all PE layers and adhesive thickness between PE layers.

A drop test was performed according to Test 1. Thirty pouches prepared as described above were subjected to a drop test at room temperature. Acceptable height was calculated by the average of the 30 total maximum heights minus 3 standard deviations. The drop test results are shown in Table 2 below, in which Laminate 1 exhibits significantly better drop resistance than Comparative Laminate 1, although Laminate 1 has a lower total thickness than Comparative Laminate 1.

Example 2. Improved Tensile Strength of 3-Layer Monopolymer PE Laminate Compared to 2-Layer Monopolymer PE Laminate Laminate 1 and Comparative Laminate 1 were subjected to tensile strength testing according to Test 2. The results of the tensile strength test are shown in Table 3 below, with Laminate 1 exhibiting significantly improved tensile strength, particularly in the transverse direction, compared to Comparative Laminate 1, while Laminate 1 is superior to Comparative Laminate It has a total thickness of less than one.

Example 3. Improved Seal Strength of 3-Layer Monopolymer PE Laminate Compared to 2-Layer Monopolymer PE Laminate and then subjected to seal strength testing by Test 3. The results of the seal strength test are shown in Table 4 below, Laminate 1 shows a much higher seal strength to the bottom seal of the stand-up bag compared to Comparative Laminate 1, but Laminate 1 has a lower overall thickness than Comparative Laminate 1 .

Example 4. Successful manufacture of stand-up pouch with spout with monopolymer PE laminate As in Example 1, the stand-up pouch accommodates the spout at the junction between the top and side edges of the pouch. Stand-up bag pouches were made using different monopolymer PE laminates (Laminate 1 and Comparative Laminate 1), respectively, except for . The spout was made from PE. During pouch manufacture, spouts were inserted into a continuous spout insertion machine (Totani ST-30 Spout Insertion Machine). Specifically, the spout was preheated (eg, 200-240° C., 0.35 MPa, and 0.5 seconds). The spout is then heat-sealed at heating station #1 (eg, 165°C, 0.2 MPa, and 0.2 seconds) followed by heating station #2 (eg, 190°C, 0.1 MPa, and 0.1 seconds). Finally it was cooled in a cooling station (0.35 MPa and 0.35 sec).

As shown in Table 5 below, Laminate 1 has a three-layer structure (MDO-PE, BO-PE, and PE) and Comparative Laminate 1 has a two-layer structure (MDO-PE for Comparative Laminate 1). and PE). Each laminate is prepared as in Example 1.

1: Huangshan Novel Co.; , Ltd. (Huangshan, Anhui, China) MDO-PE
2: Guangdong Decro Film New Materials co. , ltd. BO-PE manufactured by (Foshan, Guangdong, China)
3: Huangshan Novel Co.; , Ltd. Blown PE manufactured by (Huangshan, Anhui, China)
4: Huangshan Novel Co.; , Ltd. Blown PE manufactured by (Huangshan, Anhui, China)
5: Total thickness includes thickness of all PE layers and adhesive thickness between PE layers.

The pour spout stand-up pouches made from Laminate 1 and Comparative Laminate 1 had the same design, namely Ariel Japan, 1.35 kg strong liquid spout pouch design (pouch The dimensions were 198 mm width, 272 mm height, 55 mm gusset depth). The MDO-PE films used in all these laminates were identical. The blown PE used across all these laminates was the same PE composite, differing only in thickness. Pouches for all three laminates were formed on the same pouch making machine. Pouches were successfully prepared using Laminate 1, but Comparative Laminate 1 could not be used to make pouches because the spout could not be heat sealed with the laminate without sealing problems. I didn't. The results of pouch manufacturing are shown below. Additionally, several other sealing conditions were attempted for Comparative Laminate 1, all of which failed.

Example 5. Drop Test of Spouted Stand-up Pouches with Monopolymer PE Laminate To determine whether a spouted stand-up bag made from a monopolymer PE laminate can pass a drop test, the following Table 7 Ariel Japan, 1.35 kg strong liquid spout pouches (pouch dimensions: 198 mm width, 272 mm height, 55 mm gusset depth) were used as in Example 4 using Laminates 2 and 3 shown. and Ariel Japan, 500 g heavy duty detergent solution spout pouches (pouch dimensions were 140 mm wide, 225 mm high, 38 mm gusset depth) were prepared.

1: Huangshan Novel Co.; , Ltd. (Huangshan, Anhui, China) MDO-PE
2: Guangdong Decro Film New Materials co. , ltd. BO-PE manufactured by (Foshan, Guangdong, China)
3: Huangshan Novel Co.; , Ltd. Blown PE manufactured by (Huangshan, Anhui, China)
4: Total thickness includes thickness of all PE layers and adhesive thickness between PE layers.

A drop test was performed according to Test 1. Thirty pouches prepared as described above were subjected to a drop test at room temperature. Acceptable height was calculated by the average of the 30 total maximum heights minus 3 standard deviations. Drop test results are shown in Table 8 below, and both stand-up pouches with spouts made from Laminates 1 and 2 are able to pass the drop test at both room temperature and 5°C. This is completely unexpected as there are no known stand-up pouches with spouts made from mono-PE laminates that can pass the drop test.

All documents cited herein, including any cross-referenced or related patents or patent applications, and any patent application or patent to which this application claims priority or benefit thereof, are excluded or otherwise qualified. Unless explicitly stated to do so, it is incorporated herein by reference in its entirety. Citation of any document is not considered to be prior art to any invention disclosed or claimed herein, or that it alone or in combination with any other reference or references constitutes No such invention is considered to teach, suggest or disclose. Further, if any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition given to that term in this document shall control. shall be

While specific embodiments of the invention have been illustrated and described, it will be apparent to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

Claims (16)

A container comprising a laminate, the laminate comprising:
i) a first layer of machine direction oriented polyethylene (MDO-PE);
ii) a second layer of biaxially oriented polyethylene (BO-PE);
iii) a third layer of polyethylene (PE). The total thickness of said laminate is between 70 microns and 400 microns, preferably between 100 microns and 350 microns, more preferably between 120 microns and 300 microns, most preferably between 140 microns and 250 microns, and/or The layer has a thickness of 5 microns to 50 microns, preferably 10 microns to 45 microns, more preferably 15 microns to 40 microns, most preferably 20 microns to 30 microns, and/or said second layer , 5 microns to 50 microns, preferably 8 microns to 45 microns, more preferably 12 microns to 40 microns, most preferably 15 microns to 25 microns; A container according to claim 1, having a thickness of between 30 microns and 230 microns, more preferably between 100 microns and 200 microns, most preferably between 120 microns and 160 microns. Said container is recyclable and preferably said laminate contains no more than 10 wt%, preferably no more than 7 wt%, more preferably no more than 5 wt%, most preferably no more than 3 wt% non-PE heat 3. A container according to claim 1 or 2, comprising a plastic polymer. Said laminate has a tensile strength along the machine direction greater than 100 N/inch, preferably greater than 120 N/inch, more preferably greater than 130 N/inch, most preferably greater than 140 N/inch, measured by the method according to test 2 and/or the laminate has a has a tensile strength along the transverse direction, and/or said laminate has a tensile strength greater than 70 N/inch, preferably greater than 80 N/inch, more preferably greater than 90 N/inch, most preferably, measured by the method according to test 3 has a sealing strength at the side seal of greater than 100 N/inch and/or said laminate is greater than 70 N/inch, preferably greater than 80 N/inch, more preferably greater than 80 N/inch, measured by the method according to test 3 has a sealing strength at the bottom seal greater than 90 N/inch, most preferably greater than 100 N/inch. A container according to any preceding claim, wherein the container is a flexible bag, preferably a flexible stand-up bag, more preferably a flexible stand-up bag with a spout. A container according to any one of the preceding claims, wherein the container holds between 0.05 kg and 10 kg, preferably between 0.1 kg and 5 kg, more preferably between 0.2 kg and 3 kg of product. Claim wherein said product is selected from the group consisting of fabric care products, home care products, hair care products, beauty care products and personal care products, preferably laundry detergent products, more preferably granular laundry detergents or liquid laundry detergents. Item 6. The container according to item 6. 3. The claim wherein the layers in the stack are arranged from outside to inside in the order i), ii), iii) or ii), i), iii). The container according to any one of 1-7. said first layer has an initial sealing temperature of at least 130°C, preferably of at least 135°C, more preferably of at least 140°C, most preferably of at least 145°C, measured by the method according to Test 4;
Claims 1-8, wherein the laminate has an initial sealing temperature of 125°C or less, preferably 120°C or less, more preferably 118°C or less, most preferably 115°C or less, measured by the method according to Test 4. The container according to any one of Claims 1 to 3. A laundry detergent bag containing 0.1 kg to 5 kg of laundry detergent, said bag comprising:
i) a first layer of MDO-PE;
ii) a second layer of BO-PE;
and iii) a third layer of PE. The total thickness of said laminate is between 70 microns and 400 microns, preferably between 100 microns and 350 microns, more preferably between 120 microns and 300 microns, most preferably between 140 microns and 250 microns, and/or The layer has a thickness of 5 microns to 50 microns, preferably 10 microns to 45 microns, more preferably 15 microns to 40 microns, most preferably 20 microns to 30 microns, and/or said second layer , 5 microns to 50 microns, preferably 8 microns to 45 microns, more preferably 12 microns to 40 microns, most preferably 15 microns to 25 microns; 11. Laundry detergent bag according to claim 10, having a thickness of microns to 250 microns, preferably 30 microns to 230 microns, more preferably 100 microns to 200 microns, most preferably 120 microns to 160 microns. Said laminate has a tensile strength along the machine direction greater than 100 N/inch, preferably greater than 120 N/inch, more preferably greater than 130 N/inch, most preferably greater than 140 N/inch, measured by the method according to test 2 and/or the laminate has a has a tensile strength along the transverse direction, and/or said laminate has a tensile strength greater than 70 N/inch, preferably greater than 80 N/inch, more preferably greater than 90 N/inch, most preferably, measured by the method according to test 3 has a sealing strength at the side seal of greater than 100 N/inch and/or said laminate is greater than 70 N/inch, preferably greater than 80 N/inch, more preferably greater than 80 N/inch, measured by the method according to test 3 12. Laundry detergent bag according to claim 10 or 11, having a sealing strength at the bottom seal of more than 90 N/inch, most preferably more than 100 N/inch. A laundry detergent bag according to any one of claims 10-12, wherein the bag is a stand-up bag having a spout. A laminate,
i) a first layer of MDO-PE;
ii) a second layer of BO-PE;
iii) a third layer of PE. The total thickness of said laminate is between 70 microns and 400 microns, preferably between 100 microns and 350 microns, more preferably between 120 microns and 300 microns, most preferably between 140 microns and 250 microns, and/or The layer has a thickness of 5 microns to 50 microns, preferably 10 microns to 45 microns, more preferably 15 microns to 40 microns, most preferably 20 microns to 30 microns, and/or said second layer , 5 microns to 50 microns, preferably 8 microns to 45 microns, more preferably 12 microns to 40 microns, most preferably 15 microns to 25 microns; 15. Laminate according to claim 14, having a thickness of microns to 250 microns, preferably 30 microns to 230 microns, more preferably 100 microns to 200 microns, most preferably 120 microns to 160 microns. Said laminate has a tensile strength along the machine direction greater than 100 N/inch, preferably greater than 120 N/inch, more preferably greater than 130 N/inch, most preferably greater than 140 N/inch, measured by the method according to test 2 and/or the laminate has a has a tensile strength along the transverse direction, and/or said laminate has a tensile strength greater than 70 N/inch, preferably greater than 80 N/inch, more preferably greater than 90 N/inch, most preferably, measured by the method according to test 3 has a sealing strength at the side seal of greater than 100 N/inch and/or said laminate is greater than 70 N/inch, preferably greater than 80 N/inch, more preferably greater than 80 N/inch, measured by the method according to test 3 15. Laminate according to claim 13 or 14, having a sealing strength at the bottom seal of more than 90 N/inch, most preferably more than 100 N/inch.