TW403709B - Pouch for packaging flowable materials - Google Patents

Abstract

An environmentally friendly polymer film pouch made from a homogeneously branched linear ethylene interpolymer film structure for the packaging of flowable materials such as milk, is disclosed. A pouch made from a multilayer film structure such as a two-layer or a three-layer coextruded film containing at least one seal layer of a homogeneously branched linear polyethylene is also disclosed. A process for making a pouch for packaging flowable materials using a homogeneously branched linear ethylene interpolymer film structure is also disclosed.

Description

A7 B7 403702 V. Description of the invention (1 The present invention relates to a bag used for consumer packaging for liquid materials (such as liquid vessels such as milk). The bag is made of a certain membrane structure and contains at least one homogeneous branch Linear ethylene copolymers. U.S. Patent Nos. 4,503,102, 4,521,437, 5,288,531 and 5,360,648 disclose disposable bags for the production of polyethylene films for the manufacture of liquids such as milk packaging. U.S. Patent No. 4,503,102 discloses bags made of ethylene and C4 -Cn is an adduct of linear ethylene copolymer obtained from α-olefin copolymerization and ethylene-vinyl acetate polymer obtained by copolymerization of ethylene and vinyl acetate. The linear polyethylene copolymer has a density of 0.916 to 0.930 g Per cubic centimeter (g / cm3) and a melt index of 0.3 to 2.0 grams / 10 minutes (g / 10 min). The ethylene-vinyl acetate polymer has a weight ratio of ethylene to vinyl acetate of 2.2: 1 to 24: 1 And a melt index of 0.2 to 10 g / 10 min. US Patent No. 4,503,102 discloses that the adduct has a linear low-density polyethylene to ethylene · vinyl acetate polymer weight ratio of 1.2: 1 to 4: 1. US Patent No. 4,503,102 and also A laminate containing the aforementioned compound as a sealing film is disclosed. US Patent 4,521,437 describes a bag made of a sealing film made from 50 to 100 parts with a density of 0.916 to 0.930 g / cm3 and a marriage index of 0.3 to 2.0 g / 10 minutes of linear copolymer of ethylene and dilute -1, and 0 to 50 parts by weight of ethylene and CrC1 (with a density of 0.916 to 0.930 g / cm3 and a body index of 0.3 to 2.0 g / 10 minutes ) a -Olefin linear copolymer, high density polyethylene with density of 0.916 to 0.924 g / cm3 and melt index of 1 to 10 g / 10 minutes and its admixtures are made into beta seals disclosed in US Patent 4,521,437 The film is selected based on the following criteria: (a) Bags with an M test value that are substantially smaller than the bags described below at the same film thickness. The bags described below are based on 85 paper standards, and the household standard rate (CNS > Α4 size (210 × 297 mm) ) (诮 Please read the precautions on the back before filling this page)-Install · Thread ir. Department 10 k r.} Ji -Τ ffc A ί 印 4 ________ 40370S ___ ^ _ 5. Description of the invention (2) copies have density About 0.919 g / cm3 and melt index about 075 g / 10 Made of a blend of 15 minutes of linear ethylene / butyl-1 copolymer and 15 parts of high pressure polyethylene with a density of about 0918 g / cm3 and a melt index of 8.5 g / 10 minutes; or (b) a pair of For bags larger than 5 ”to 5 liters, the m (2) test value is less than about 12%; or ⑷ For bags with a volume of 3 liters, the m (i.3) test value is less than about 5%. The M, M (2) and M (1.3) tests are bag drop tests as defined in US Patent No. 4,521,437. The bags are also made of composite film, where the sealing film constitutes at least an inner layer. U.S. Patent No. 5,288,531 discloses a bag made of a film structure having a conjugate of both: (&) 10 to 100 parts by weight polymerization of at least one ultra-low density linear ethylene copolymer The material is a sealing layer consisting of ethylene and at least one C3-C100: an olefin copolymer having a density of 0.89 g / cm3 to less than 0-915 g / cm3, and (b) 0 to 90 The weight ratio of at least one polymer is selected from the group consisting of linear copolymers of ethylene and Crc18a-olefins having a density greater than 0.916 g / cm3 and a melt index of 0.1 to 10 g / 10 minutes; the high pressure low density polyethylene has a density of 0.916 to 0.930. G / cm3 and melt index from 0.1 to 10 g / 10 minutes; or ethylene_vinyl acetate copolymer having a weight ratio of ethylene to vinyl acetate of 2.2: 1 to 24: 1 and a melt index of 0.2 To 10 g / 10 minutes. The hot-melt sealing layer of U.S. Patent No. 5,288,531 can provide improved double-layer or triple-layer co-extruded multilayer film structure with improved hot-tack strength and lower hot-seal starting temperature. U.S. Patent No. 5,360,648 discloses a bag made of a film structure having a blend of both: (a) 10 to 100 parts by weight of at least one homogeneous branched substantially linear ethylene / α-olefin copolymer having One of the political papers described in the paper is suitable for the standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling in this I) -Packing-Order-Line A7 B7 V. Description of Invention (

40370S characteristics; and (b) 0 to 90% by weight of at least one polymer selected from the group consisting of heterogeneous branched linear ethylamidine / C3-C18a-dilute hydrocarbon copolymers, high pressure low density polyethylene and ethylene vinyl acetate copolymers. The film structure of U.S. Patent 5,360,648 provides a wide range of heat seals. Polyethylene bags known in the prior art have some drawbacks. Problems with films known in the prior art are related to the sealing properties and performance of the films produced. In particular, the prior art has a high incidence of "leakage" when the film is made into a bag. In other words, sealing defects such as small holes appear at or near the seal, so the tissue of the fluid substance flows out of the bag. Although the sealing and performance of the prior art film have been satisfactory, the industry still needs the film to have better sealing and performance properties for the manufacture of air-tight sealed bags that contain fluid substances. In particular, it is necessary to improve the sealing properties of the film, such as higher hot-tack strength and lower hot-tack and heat-seal initiation temperature. Improve the processability of the film and the bag made of the film. For example, the packaging line speed of known packaging equipment for making bags such as forming, filling and sealing machines is currently limited by the sealing properties of the film used by the machine. Prior art polyethylene films typically have relatively low thermal tack strength, high thermal tack seal initiation temperatures, and narrow seal ranges. Therefore, the rate of bag production by forming, filling and sealing machines is limited. If the hot-tack strength can be improved and the temperature range of hot-seal for obtaining strong seals can be widened, the speed of the machine for forming, filling and welding can be increased, so that the production speed of the bag can be increased. "So far, attempts have been made to expand the bag film. The heat sealing temperature range is different from the power. It would be desirable to provide a polymer film structure for a pouch container that has a higher thermal tack strength over a wider range of prior art films, or a suitable alternative thereof. This paper size applies Chinese National Standard (CNS) A4 specification (21 × 297 mm) (诮 Please read the precautions on the back before filling in the (?!) Page) 屮 k il 乂, j ii 消 fc 竹 印 1 ^ ----- ^-r ------ salty ---------- 6 403708% V. Description of the invention (4) ~~ I hope to provide a wide range of heat sealing and its performance properties A polyethylene film structure that is as good or better than the known prior art bag films. It is also desirable to provide a film structure for a bag container which has a heat-sealable layer, so the film structure has a wider sealing range for bag transformation and the finished product has acceptable physical properties. Furthermore, it is desirable to provide a bag made of the aforementioned film structure, so that the failure rate of the bag is reduced. It has been discovered today that homogeneously branched linear ethylene / α · olefin copolymers can provide significant advantages in the membrane structure of bags. Homogeneously branched linear ethylene / α-olefin copolymers have higher thermal tack strength than homogeneously branched substantially linear ethylene / α-olefin copolymers when used as a sealant. It has good heat-sealability at lower temperatures than required for heterogeneous branched linear ethylene / α-olefin copolymers, and it is easy to learn thin slabs and heat-seal equipment. A bag made of a film structure containing a homogeneously branched linear ethylene / α-olefin copolymer also has unexpectedly good pop-up properties when used as a seal layer or a combination thereof as a core layer. One aspect of the present invention is directed to a bag made of a film structure having a tubular shape and a transverse heat-sealed end, the film structure comprising at least one film layer comprising: (I) 10 to 100% by weight of at least one layer comprising at least one Homogeneous branched linear ethylene / α-olefin copolymers are characterized by: (a) a composition distribution branch or width index (CdBI) greater than 50%, and (b) a molecular weight distribution MW / MNS 1.5 to 2.5; and (II) 0 Up to 90% by weight of at least one polymer is selected from the group consisting of heterogeneous branched linear ethylene olefin copolymers, high pressure low density polyethylene, and; this paper size applies to China National Slope (CNS) A4 specification (210X297 male sauce). II-t -=-II ------ nn / i.ir III (please read the precautions on the back before reconcile this book) -------- 7 40370S A7 ______________________________ B7 V. Description of the invention (5) 'Ethylene-vinyl acetate copolymer. A specific example of the present invention is a bag made of a double-layer (that is, A / B) co-extruded film, which contains an outer layer of heterogeneous branched linear low-density polyethylene and an inner sealing layer of the aforementioned homogeneous branched linear ethylene copolymer. . Another specific example of the present invention is a bag made of three layers of co-extruded film (that is, eight or eight or eight / ...). The film contains an outer layer and a core layer containing heterogeneous branched linear low-density polyethylene. (The same or dissimilar heterogeneous branched linear low density polyethylene) or high pressure low density polyethylene and an inner sealing layer containing the aforementioned homogeneous branched linear ethylene copolymer. Another aspect of the present invention is a method for preparing the aforementioned bag. Another aspect of the invention is directed to a bag made of a tube-shaped film structure with a transverse heat-sealing end, the bag structure containing at least one film layer containing (I) 10 to 100% by weight, at least one layer containing at least one Homogeneous branched linear ethylene polymer, wherein the homogeneous branched linear ethylene polymer is characterized by: (a) a density of 0.90 g / cm3 to 094 g / cm3, (b) a CDBI greater than 50%, and (C) Single differential scanning card metering (DSC) melting peaks are _30t to 5 (rc; and (II) 0 to 90% by weight. At least one polymer is selected from the group consisting of heterogeneous branched linear ethylene olefin copolymers, high pressure. Low density polyethylene and ethylene-acetic acid Ethylene ester copolymer "Another specific example of the present invention is a double-layer (ie, A / B) co-extruded film. The paper size is suitable for National Standards (CNS) A4 (210X297 mm) ----- --------- IT ------ 0-* · (诮 Read the precautions on the back before writing this page) A74037Ω〇β7 Red α \ Department again :) eliminate \\ η 卬- ¾1) 5. Description of the invention (6 bags) The film contains an outer layer of heterogeneous branched linear low-density polyethylene and an inner sealing layer of the aforementioned homogeneous branched linear ethylene copolymer. Yet another specific example of the present invention consists of three Layers (ie A / β / Α or A / B / C) bags made of co-extruded film containing an outer layer and a core layer containing heterogeneous branched linear low density polyethylene (same or dissimilar heterogeneous Branched linear low density polyethylene) or high pressure low density polyethylene and an inner sealing layer containing the aforementioned homogeneous branched linear hexene copolymer. Another aspect of the present invention is a method for preparing the aforementioned bag. The film structure of the bag of the present invention Better sealing and lower hot-tack strength compared to currently available commercially available films at lower sealing temperatures The use of the bag-making film of the present invention in a forming, filling, and sealing machine allows the machine speed to be higher than the speed that can be achieved using a commercially available film. Figure 1 shows a perspective view of the bag packaging of the present invention. Figure 2 A perspective view of another bag package of the present invention is shown in Fig. 3. Fig. 3 is an enlarged perspective view of a part of the film structure of the bag of the present invention.第. Figure 5 shows another specific example of the film structure of the bag of the present invention and another partially enlarged cross-sectional view. 第 6 囷 is based on Table 9 resin 9_π and comparative resin 13, the maximum film heat of the bag of the present invention Graphical illustration of viscosity versus resin density 密度. As shown in FIGS. 丨 and 2, the bag for packaging a fluid substance of the present invention is made of a single-layer film structure of a polymer sealing layer, which is a homogeneous branched linear ethylene / α-olefin copolymer (hereinafter It is called "HBLEp ,,". This paper size is in accordance with CNS A4 specification (210X2 ^^ 7

-------------- IT ------. ^ Is-(Please read the notes on the back before filling in this page J 9 40370ii a? ___________ B7 _ V. Description of the invention ( 7) (; Read the precautions on the back before writing this page) The HBLEP of the present invention is usually a copolymer of ethylene and at least one 0: -dilute hydrocarbon containing 3 to 20 carbon atoms. The term "interp〇lymer" is used herein to indicate a copolymer (copomer or terpomer), etc. In other words, 'at least one other comonomer is polymerized with ethylene to make a copolymer For example, the HBLEP terpolymer containing ethylene / 1-octene-hexene can be used in the membrane structure as a polymer sealing layer. A polymer of ethylene and C3-C2 () α-olefin is particularly preferred. For example, HBLEP can be selected from ethylene / Propylene, ethylene / 1-butene, ethylene / 〖· pentene, ethylene / 4-menthyl-1-pentene, ethylene / 1-hexene, ethylene / 1_heptene, ethylene /〗 _ octene and Ethylene / 1-decene copolymer, preferably ethylene / 1-octene copolymer. As for the preferred polymer used in the present invention, the term ', homogeneously branched linear ethylene polymer' means that the olefin polymer has a homogeneous short Branched, but without long-chain branches. In other words, 'linear ethylene polymers do not contain long-chain branches. Such polymers include linear low-density polyethylene polymers and linear high-density polyethylene polymers, which can be used to provide uniform branches (also (Ie, homogeneous branches) by a polymerization method of distribution (as described by Elston in USP 3,645,992). Uniform branch distribution is in which comonomers are scattered randomly in a specific copolymer molecule, and substantially all of the copolymer molecules in the copolymer have equal Ethylene / comonomer ratio. In the Elston polymerization process, soluble vanadium catalyst systems are used to make polymers, but other companies such as Mitsui Petrochemical and Exxon Chemical have used so-called single-site catalyst systems to produce linear systems with similar homogeneous structures. Ethylene polymers. Examples of such linearly homogeneous branched ethylene polymers include TAFMER, which is the trade name of Mitsui Petrochemical Company, and EXACT and EXCEED, which are manufactured by Exxon Chemical Company. Sale of this paper size Shizhou China National Standard ([Yang> Six 4 size (210 father 297 mm) 10

40370S V. Description of the Invention (8) --- The trade name of the product. "Homogeneous branched linear ethyl compound,-the term non-referred to the old branched polyethylene glycol known to the industry containing many long bond branches. Typically, the homogeneous branched linear ethylenic polymer is an ethylene / α · smoky copolymer, Among them, the thin smoke is at least one C3-C20fl! -Hydrocarbon (such as propylene, butylene, butylene, 4-methyl-1-pentene, 1-hexene, 丨 -octene), preferably at least one of them. An alpha hydrocarbon is 1-octene. The best ethylene / α · olefin copolymer is a copolymer of ethylene and a C3_C20a olefin, especially an ethylene / C: 4-c6 α-dilute hydrocarbon copolymer. Also, "Homogeneous The term "branched linear ethylene polymer" does not refer to a homogeneous branched substantially linear polymer (hereinafter referred to as "SLEP") and is different from SLEP, ie, for example, Falla et al. Are described in US Patent 5,360,648. The main chain of the copolymer in SLEp is replaced by 0.01 to 3 long chain branches per 100,000 carbons. "SLEp examples include ENGAGE and AFFINITY, trade names manufactured and sold by The Dow Chemical Company." Short chain The branch distribution index (SCBDI) or the composition distribution branch index cDBI is defined as the weight percentage of the polymer molecules whose comonomer content falls within the range of 50% of the median total mole content. The CDBI of polymers can be calculated from data obtained by well-known techniques, such as temperature-increasing dissolution and separation techniques (herein abbreviated as "TREF"), for example, described in Journal Polymerj eienee, Poly. Phys. Ed., V〇1.20 Ρ 441 (1982), author Wild et al., Or U.S. Patent 4,798,081. The SCBDI or CDBI of the homogeneous branched linear ethylene / α-women copolymers (copolymers) and copolymers (copolymers) used in the present invention is greater than about 50%, preferably greater than about 70%, more preferably greater than about 80% and Optimally greater than about 90% »Homogeneous branched linear B paper used in the present invention is suitable for Sichuan China Storehouse Standard (CNS) M specification (210X297 mm) 1 ^ 1 ^ n—. -Pack-(Please read the back first Please fill in this page for the note item-T-口 11 4Ml0k___b7__ V. Description of the invention (9) (Please read the notes on the back before filling in the transcript 1) a / a-Office i-copolymer (interpolymer) and copolymerization Polymers, such as those measured by the "TREF" technology, lack measurable "high density," parts. The high density part includes linear homopolymer polyethylene. The "high density" part can be described as having a degree of branching A polymer portion that is less than or equal to about 2 methyls per 1000 carbons. The term "substantially lacks a measurable high-density portion" means that linear copolymers and copolymers do not have a degree of branching less than or equal to about 2 methyl / 1000 carbon polymer part. Here The term "narrow short chain distribution" is used to refer to copolymers and refers to the branching distribution of olefin monomers of copolymers characterized by SCBDI or CDBI. This term is defined as a copolymer molecule having an alpha-olefin monomer content greater than about 50 weight percent It is within the range of 50/0 of the median value of the total mole content of the α-olefin monomer. The calculation technique of the CDBI is outlined as above. However, the preferred TREF technique does not include the removal amount in the CDBI calculation. The monomer of the better copolymer Distribution and CDBI were determined using 13C NMR analysis according to the techniques described in US Patent No. 5,292,845 and Rev. Macromol. Chem. Phys., C29, pp. 201-317, author JCRandall, etc. Homogeneous branch and low density polyethylene (hmVLDPE) Homogeneous branched linear low density polyethylene (hmLLDPE) is well known in the industry. For example, Elston disclosed in U.S. Patent 3,645,992. HmVLDPE and hmLLDPE can be prepared in solution, slurry, and gas phase processes using hafnium, zirconium and vanadium catalyst systems. Ewen et al., U.S. Patent 4,937,299 A method for preparing such polyethylene using a metallocene catalyst is described. HmVLDPE and hmLLDPE are linear polyethylenes, which are homogeneous branched polymers. Ziegler-type non-homogeneous linear polyethylene, which does not contain long-chain branches. Commercial examples of these polymers, such as Mitsuimoto Paper, are medium-sized (CNS) A4 (2 丨 0 X 297 mm) ) 12 Α7 Β7 ______ 4〇37〇c 5. Description of the invention (μ Petrochemical Company sells under the trade name Tafmo and Exxon Chemical Company sells it under the trade names Itzac and East. As for the better homogeneous branched linear ethylene polymer, the homogeneous branch indicates that the comonomers are scattered in the specific copolymer molecule, and all the copolymer molecules in the copolymer have equal ethylene / comonomer in the copolymer. ratio. The term "linear ethylene / α · olefin copolymer" does not refer to high-pressure branched (radical polymerized) polyethylene, as known in the industry, which has relatively many long-chain branches. The homogeneous branched linear ethylene / α-kun of the present invention Hydrocarbon copolymers and copolymers have a single melting point, which is the opposite of traditional Ziegler polymerization (heterogeneous polymerization) copolymers with two or more melting points. (DSC) is measured at a temperature range of 200 ° C to 150 ° C. In addition, the novel homogeneous branched linear ethylene / α_enecopolymers and interpolymers have dazzling points and copolymers. Or the copolymer density is related. As the polymer density decreases, the melting peak decreases in a direct linear relationship. On the contrary, heterogeneous branched ethylene polymers have melting point peaks that do not change substantially with the polymer density, mainly due to the existence of melting points High density polymer portion (homopolymer linear polyethylene melting point) of about 1221. The homogeneously branched linear ethylene / α-olefin copolymer or copolymer used in the present invention The density of (COpolymer) (measured according to ASTM D-792) is usually below about 0.94 g / cm3 and preferably from 0.90 g / cm3 to 0.94 g / cm3. Generally homogeneous branched linear ethylene / α-olefin polymers Separately used for the sealing layer of the membrane or membrane structure. However, the homogeneous branched linear ethylene / α-olefin polymer can be applied to the Chinese Standard (CNS) A4 specification (210X297 mm) for this paper size --------- ----- ΐτ ------ 0-(Please read the notes on the back before writing this page) k ii -Ί i / ί ί \ / ·, ii 印 13 A7

40370S _________B7_ V. Description of the invention (1 1) Blend other polymers for hot-melt sealing layer. Generally, the content of the homogeneously branched linear ethylene olefin polymer is 10 ° / of the polymer composition of the film structure. To 100% by weight. The molecular weight of the homogeneous branched linear acetamidine / α-hydrocarbon copolymer (copolymer) and copolymer used in the present invention can be measured using the solution index according to ASTM D-1238 conditions 190 ° (: / 2_16 仟 g (formerly known as "Condition (E)" is also called ID for easy indication. The melt index is inversely proportional to the molecular weight of the polymer. So the higher the molecular weight, the lower the melting point. But the relationship is not linear. The homogeneous branch linear ethylene / The melt index of α-olefin copolymers and copolymers is usually about 10 g / 10 minutes (1 dg / 10 min) or less, preferably 0.01 g / 10 minutes to 10 g / 10 Divide, optimal 0.4 g / 10 minutes to 1.2 g / 10 minutes. Another molecular weight that can be used to characterize homogeneous branched linear ethylene / α-olefin copolymers (interpolymer) and copolymers (copolymer) is measured according to ASTM The measurement of the melt index of D-1238 condition 190 ° C / l0 仟 g (formerly known as 'condition (N)', also known as Ιιο) is conveniently indicated. The two melt index ratios are the standards for the melt flow ratio. Not 11 〇 / 12. For a homogeneous linear ethyl baking polymer 'Ιι〇 / Ι2 The ratio has an interactive relationship with the molecular weight distribution, that is, as the MW / MN increases, 11 () / 12 also increases. However, because the homogeneous branched linear ethylene polymer has a narrow MW / MN (1.5 to 2.5), 110/12 The ratio is low (ie about 6.5). The molecular weight distribution (MW / MN) of homogeneous branched linear ethylene / 〇! -Diluted smoke copolymer (interpolymer) and copolymer (copolymer) is by gel permeation chromatography (GPC) Analysis' GPC is based on Waters 150C high-temperature chromatography unit equipped with three mixed porosity columns (Polymer Laboratories 103, 104, 105, and 106) at the paper scale. Mm) 14

40370S Plant V. Description of Invention (l2) Gentle operation of 140eC system. The solvent was 1, 2, 4 · trifluorobenzene, and a sample solution of 0-3% by weight was prepared from the solvent for injection. The flow rate was 1.0 ml / min and the injection volume was 200 microliters. The molecular weight was determined using a narrow molecular weight distribution polystyrene standard (available from Polymer Laboratories) combined with its dissolution volume. The equivalent polyethylene molecular weight is determined using the Mark-Houwink coefficients of appropriate polyethylene and polystyrene (as described by Williams and Ward in Journal of Polymer Science, Polymer Letters, Vol. 6, (621) 1968). The following formula is deduced: M polyethylene = a * (M polyethylene) b

In the formula, a = 0.4316 and b = 1.0 »The weight average molecular weight 1 ^^ is calculated in the usual manner according to the following formula: Mw = 2, where% and 1 ^ are the weight components of the first dissolution fraction dissociated by the GPC column, respectively. And molecular weight. The MW / MN is preferably 1.5 to 2.5 and particularly 2 to 2.5 for homogeneously branched linear ethylene / α-dilute hydrocarbon copolymers and copolymers. Additives known to those in the industry, such as antioxidants [such as blockers (such as Irganox 1010 or Irganox 1076, manufactured by Ciba Geiger), phosphites (such as Ergofos ( Irgafos) 168, manufactured by Ciba Gage Company, suspension additives (such as polyisobutylene (PIB)), Standostab PEPQ (supplied by Sandoz), anti-caking additives, slip additives, UV stabilizers, pigments, processing aids (especially fluoroelastomers such as Dynamar FX 5920, manufactured by 3M, which can be used to improve the processability of homogeneous branched linear ethylene polymers) can also be added to this paper scale Tongzhou Central China National Standards (CNS) M Specification (2 丨 〇x297mm) Packing ------ Order ------ Wire * 1 (Read the precautions on the back before filling in this page) 15 A7 factory ---------_ 4〇37〇δ ___ Ε ___ V. Description of the invention (l3) The polymer of the film structure, thereby manufacturing the bag of the present invention. The film and film structure disclosed herein can be single-layer or Multilayer film structure, homogeneously branched linear ethylene / α-olefin copolymer (copolymer) and copolymer (in terpolymer) is used as at least one layer, preferably a sealing layer. The thickness of the sealing layer is at least about 0.1 mil (2.5 microns) and above, preferably 0.2 mil (5 microns) to 10 mil (254 microns), and particularly preferred 0.4 mils (10 microns) to 5 mils (127 microns). The unexpected feature of the film structure of the bag of the present invention is its wide heat seal range, especially given the narrow melting range of linear ethylene polymers (using differential scanning) This is especially true for cardometric measurements. Usually the heat seal range of the film structure is 50 ° C to 160 ° C and preferably 75 ° C to 130X: The sealing layer of the present invention has been found to be relatively made of heterogeneous branched ethylene polymers The prior art polyethylene film has a wider heat seal range, even at comparable densities. The wide heat seal range permits greater flexibility for the heat seal method used for bags made from film structures. It is generally used The melting point range of the linear ethylene polymer for manufacturing the film structure with the film structure of the heat-seal range as specified above is 50 »c to 1300c, preferably 55 ° C to 115 ° C. 4 Another aspect of the bag structure of the present invention An unexpected feature is The highest thermal tack strength of the film is measured using the DTC thermal tack strength method as defined below. Through f; Density reduction of often heterogeneously branched linear ethylene / α-olefin copolymers has no effect on the maximum | thermal tack strength. The film of the invention can achieve higher thermal tack strength when the density of the homogeneously branched linear ethylene / i / α-olefin copolymer (Copolymer) and copolymer (interpolymer) is low. I; The film of the invention Another is an unexpected feature for comparing money from a homogeneous paper rule.

16. 40370S _B7 'Explanation of the invention (M) Branches made of substantially linear acetamidine / α-dilute copolymers (copolymer) and copolymers (interpolymer) can achieve higher thermal viscosity in a wider area. For example, a film made of a heterogeneously branched linear ethylene / α-olefin copolymer has a maximum thermal tack strength of 2.7 Newtons / inch at a density of 0.905 g / cm3, and a substantially linear ethylene / α_olefin copolymer made of a homogeneous branch The film has a maximum thermal tack strength of 0.902 g / cm3 and a density of 7.0 Newtons / inch, and a film of the present invention made of a homogeneous branched linear ethylene olefin copolymer having a density of 0.900 g / cm3 has a maximum thermal tack strength of 98 Newtons The film structure of the present invention also has a hot-tack or hot-seal starting temperature lower than about U (rc.) At a force of at least about 1 Newton / 忖 (39.4 Newtons / meter). The seal made by the dissolving layer has higher strength than the prior art with a higher density of polyethylene at a lower sealing temperature. High heat seal strength at low temperatures and a wide range of heat viscosity are permitted for conventional packaging equipment such as vertical forming, filling It is very important that the sealing machine produces the bag at a higher rate with less leakage. It is believed that the use of at least one homogeneous branched linear ethylene polymer in the sealing layer of the pouch structure of the bag of the present invention can For: (1) a bag that can be manufactured at a faster rate via a forming, filling, and sealing machine; and (2) a seal that has fewer leaks, especially when the bag of the present invention uses linear low density polyethylene, This is especially true for bags made of ultra-linear low-density polyethylene, high-pressure low-density polyethylene, or a combination thereof. In a specific example of the present invention, the bag is made of a film structure that is tubular and has a transverse heat-sealable end. Membrane structure has at least one membrane layer package A7 B7 one 403708 V. Description of the invention (is (I) 10 to 100% by weight at least one layer containing at least one homogeneous branched linear ethylene / α-olefin copolymer characterized by: U) composition Distribution branch or width index (cdbI) is greater than 50%, and (b) molecular weight is WMw / MN $ 1.5 to 2.5; and (II) 0 to 90〇 / 〇 at least one polymer is selected from the group consisting of heterogeneous branched linear ethylene / C3-C18a-olefin copolymer, high-pressure low-density ethylene and ethylene · vinyl acetate copolymer. (11) Heterogeneous branched linear ethylene / C3-C18a-dilute hydrocarbon copolymer is usually a linear low-density polyethylene (if used Geller's catalysts make linear low density Polyethylene is often divided into small collections called very low-density polyethylene (VLDPE) or ultra-low-density polyethylene (ULDPE). VLDPE and ULDPE are interchangeable here and are roughly used in a manner known to the industry. Usually (11 The density of linear low-density polyethylene is in the range of 0.87 g / cm3 to 0.94 g / cm3, preferably 0.87 g / cm3 to 0.912 g / cm3. The linearity of the heterogeneous branch of (II) is preferably low The density ethylene / C3-C18〇: -olefin copolymer has a melt index of 0.1 to 10 g / 10 minutes. The high-pressure low-density polyethylene of (Π) preferably has a density of 0.916 to 0.93 g / cm3 and a melt index of 0.1 to 10 g / 10 minutes. The preferred (II) ethylene-vinyl acetate copolymer has a weight ratio of ethylene to vinyl acetate from 2.2: 1 to 24: 1 and a melt index from 0.2 to 10 g / 10 minutes. Referring to the 3rd to 5th circles, the film structure of the bag of the present invention also includes a multilayer or composite film structure 30, preferably containing the aforementioned polymer sealing layer as the inner layer of the bag. As known to those in the industry, the multilayer film structure of the bag of the present invention can contain a variety of films. The paper size is in the state of China (CNS) A4 (210X297 mm). -------- Π ----- --- 1T ------ ^-* (诮 Please read the notes on the back before filling this page) *. ≫ < y, Ministry • 1 '.Fire ii. 乂' J ji fc Vi- 卬ί1 18

• V eliminate 1! · Α η a printed A7 B7 403708 — ------------------ — 5. Description of the invention (1 6) Layer combination, as long as the sealing layer constitutes the final film Just a part of the structure. The multilayered rhenium structure of the present bismuth can be a co-extruded film, a coated film, or a laminated film. The membrane structure also contains a sealing layer combined with a barrier layer such as polyester, nylon, evoh, polyvinylidene gas (PVDC) such as Saran (trade name of The Dow Chemical Company) and a metallized film. The end use of the bag can indicate to a considerable extent the choice of other materials used in combination with the sealing film. Here, the bag refers to at least one bag with a sealing layer on the inner side. As shown in Fig. 3 (a), a specific example of the film structure 30 of the bag of the present invention includes a homogeneously branched linear ethylene polymer sealing layer 31 and at least one polymer outer layer 32. The polymer outer layer is preferably a polyethylene film layer, more preferably a heterogeneous branched linear polyethylene, hereinafter referred to as, linear low density polyethylene (LLDPE) or a combination thereof '' '' ultralinear low density polyethylene ("Uldpe") or a combination thereof, `` Very Low Density Polyethylene, '' ("VLDPE") or a combination thereof, and a homogeneously branched substantially linear ethylene polymer "(SLEP), an example of a commercially available LLDPE is DOWLEX 2045 (commercial name available from The Dow Chemical Company). An example of a commercially available ULDPE is ATTANE 4201 (a commercial name available from The Dow Chemical Company). An example of a commercially available SLEP is AFFINITY PL 1880 (A commercially available product from the Dow Chemical Company). Name) 〇 LLDPE (including VLDPE and ULDPE) used here is a heterogeneous branched linear copolymer, which is ethylene and a small amount of α-olefins containing 3 to 18 carbon atoms, preferably 4 to 10 carbon atoms (such as 1-butene, 4-methyl-1-pentene, 1-hexene, octene and 1-decene) and copolymers preferably containing 8 carbon atoms (such as 1-octene). Usually Heterogeneous branch LLDPE system uses Ziegler catalyst: this paper scales Sichuan National Standard (CNS) A4 specification (210X297 mm) installed -------- order ------ line-- (read first (Notes on the back are reproduced on this page) 19 40370δ Α7 -------------- Β7 _ ^ ___ V. Description of the invention (1 7) For example, use the method described in US Patent 4,076,698 (Anderson, etc.) LLDPE for outer layer 32 usually has a density greater than 0.87 g / cm3, more preferably 0.9 to 0-93 g / cm3; usually has a melt index (12) to 10 g / 10 minutes, It is preferably 0.5 to 2 g / 10 minutes; and usually has an I / O 2 ratio of 5 to 20, preferably 7 to 20. As for the heterogeneous branched LLDPE (including VLDPE and ULDPE), the 110/12 ratio tends to follow the molecular weight of the LLDPE ( mw / Mn) increase, which is an unexpected contradiction with the novel homogeneous branched linear ethylene / α-olefin copolymer (copolymer) and copolymer (copoimer) discussed here. US Patent Use 5,2 < 72,236 and 5,278,272 to produce a homogeneous branched substantially linear ethylene / α-olefin copolymer (SLEp) for the outer layer 32, having a melt index Iz of 0.01 g / 10 minutes to 10 g / 10 minutes, Preferably 0-5 to 2 g / 10 minutes; and a density of 0 85 g / cm3 to 0 94 g / cm3, preferably 0.900 to 0.925 g / cm3: and a molecular weight (Mw / Mn) of 1.5 to 5 2.5 and solution flow ratio ι1 () / ΐ2 is at least about 7 and preferably 7 to 20. The thickness of the outer layer 32 can be any thickness as long as the minimum thickness of the seal layer 31 is about 0.1 mole (2.5 microns). As shown by the circle, another specific example of the film structure 30 of the bag of the present invention includes a polymer layer 32 sandwiched between two polymer sealing layers 31 As shown in Fig. 5, still another specific example of the film structure 30 of the bag of the present invention includes at least one polymer core layer 33 between at least one polymer outer layer M and at least one polymer sealing layer 31. The polymer layer 33 has the same LLDPE or a combination of SLEp film layers as the outer layer 32, or preferably a different paper size (CNS) A4 specification (Public Authors ----- ------- ------- 11 ------ ^-~ (诮 Read the notes on the back before filling in this buttercup) 20 V. Description of the invention (I8

Or its combination SLEP, and more preferably LLDPE or its combination SLEP has a higher density than the outer layer 32. The thickness of the core layer 33 may be any thickness, as long as the minimum thickness of the sealing layer 31 is about 0. mil (2.5 microns). 0 ^ 70 Another specific example (not shown) of the film structure of the bag of the present invention may have a structure including a sealing layer 31 and another polyethylene film layer, which will be referred to as `` high-pressure low-density polyethylene, '' hereinafter ("LDPE") "The LDPE layer typically has a density of 0.916 to 0.930 g / cm3 and a melt index of ⑺ to ⑺g / 10 minutes. As long as the minimum thickness of the sealing layer 31 is about 0.1 mil (2.5 microns), the LPDE can be any thickness. Another specific example (not shown) of the film structure for the bag of the present invention may have a structure including a sealing layer 31 and an EVA copolymer layer having a weight ratio of ethylene to vinyl acetate of 2.2 to 1 to 24: 1 and melt index from 02 to 20 g / 10 minutes ^ The thickness of the EVA layer can be any thickness. As long as the minimum of the sealing layer 31 is about 0.1 mil (2.5 microns), the thickness of the film structure used to make the bag of the present invention is 0.5 mil (27 microns) to 10 mil (254 microns), which is 1 mil (25.4 micrometers) to 5 mils (127 micrometers) "As can be seen from the different specific examples of the present invention shown in circles 3-5, the film structure of the bag of the present invention has design flexibility. Different LLDPE (such as VLDPE and ULDPE) or SLEP can be used for the outer layer or core layer to obtain the best specific film properties such as film stiffness and film physical properties. Such films can be optimized for specific applications such as forming, filling and sealing machines. The polyethylene film structure used to make the bag of the present invention can be manufactured by a blow pipe extrusion method or a cast extrusion method known to those skilled in the art. Blow pipe extrusion method, for example, this paper is in accordance with the CNS A4 specification (210X297 mm) '-~~~---------- ^ — (Please read the precautions on the back first Transcribe this page} Order line 21 40370S μ ____ B7 V. Description of the invention (19) ~~~ A description was published in Modern Plastics Encyclopedia in October 1989, which published 66 volumes, 11 issues, pages 264 to 266. The casting extrusion method is described in, for example, Modern Plastics Encyclopedia Issued in October, 1989, Volume 66, Issue 11, page 256 to 257. Specific examples of the bag of the present invention are shown in i and 2 圊, which are filled with a gas-tight container β ′, which is a fluid substance. “Substance” means that the substance can flow and be pumpable under the action of gravity, but “flowable substance” does not include gaseous substances. Flowable substances include non-carbonated liquid vessels (such as milk, water, juice, wine) and carbonated liquids ( (Such as soda, beer, water); emulsions (such as ice cream mixture, soft milk marlin); pastes (such as meat paste, peanut butter); preserved items (if. Sauce, pie filling, marmalade); jelly; dough; minced meat (Such as sauce); powder (such as gelatin powder, detergent); granular solid (such as Stone fruit, sugar, oatmeal) and other materials. The bag of the present invention is particularly useful for packaging liquids (such as milk). Flowable substances also include oily liquids (such as cooking oil or machine oil). Once the film structure of the bag of the present invention is completed, The structure is cut to a desired width by a conventional bag-making machine. The specific examples of the bag of the present invention are shown in Figures 1 and 2), which are manufactured by the so-called molding, filling and sealing machines well known in the industry. The tubular member 11 has a longitudinal blanking seal 12 and a transverse seal 13 so that a "pillow" bag is formed when the bag is filled with a fluid substance. As for the second 圊, the bag 20 is a tubular member 21 and has three along the tubular member 11 three. The fin seal 22 around the sides, that is, the top seal 22a and the longitudinal side seals 22b and 22c, and the generally concave or "bowl-shaped" member 23 with the bottom is sealed to the bottom of the tubular member 21, so the bag is filled with a fluid substance When viewed in a circular cross-section, a generally semi-circular or bowl-shaped bottom is formed in the longitudinal direction. The bag shown in Figure 2 is known in the industry as the so-called 'Enviro-Pak' bag. This paper is in accordance with the China National Standard (CNS) ) Α4 size (210X297 mm) meal " ------ line (please Read the notes on the back and fill in this page) 22 40370S A7, __________B7 V. Description of the invention (20) The bag made by the present invention is preferably the first in the industry known as the vertical forming, filling and sealing (VFFS) machine manufacturing Round bags. Examples of commercially available VFFS machines include those manufactured by Hayssen or Prepac. VFFS machines are described in the following references: FCLewis, "Form-Fill-Seal", Packaging Encyclopedia »page 180 ° in the VFFS packaging process Here, the plastic film structure sheet described herein is fed into a VFFS machine, and the sheet is formed into a continuous tube in a film forming section. The pipe is formed by the longitudinal edge of the sealing film together with the inner / outer seal compressive plastic film and the sealing film, or the inner / inner seal fin-shaped sealing plastic film. Secondly, the sealing rod transversely seals the tube at one end serving as the bottom of the bag, and then a filling material such as milk is added to the bag. The top of the sealing rod sealing bag is then burned with plastic or cutting film, thus separating the formed complete bag from the tube. The bag making process using the VFFs machine is outlined in U.S. Patent Nos. 4,503,102 and 4,521,437. The bag capacity of the present invention can be changed. Usually the bag contains 5 to 10 liters, preferably 10 to 8 liters and more preferably 1 to 5 liters of flowable material. Using the homogeneous branched linear ethylene / α · olefin copolymer of the present invention to seal a double-layer or triple-layer co-extruded film product to obtain a film structure, which can be used in VFFS and its production of bags at a faster rate. Leak point. The bags of the present invention may also be printed using techniques known in the art, such as arc discharge or flame treatment before printing. The use of bags for packaging consumer liquids such as milk has advantages over past use of containers such as glass bottles, cartons, and high density polyethylene bottles. The containers used in the past consumed a lot of natural resources during the manufacturing process, and required a lot of empty when they were buried. ——Bills (CNS) A4 (210X297 mm) ~-Packing --- I, ----- " (Read the precautions on the back before writing ") 23

Vi «Ο ^ Α7 '---------------------------- B7 V. Description of the invention (2 1) One'-~ Lose a lot of storage space and use more energy for temperature control of the product (due to the heat transfer properties of the container). The bag made of a film for packaging liquid capsules of the present invention can provide a variety of advantages over conventional containers. Bags: ⑴ consumes less natural resources, ⑺ requires less space when buried, (3) can be recycled, (4) is easy to process, requires less storage space, and (6) requires less energy during storage (packaging The heat transfer properties, (7) can be safely incinerated, and (8) can be reused (for example, empty bags can be used for other purposes such as freezer bags, sandwich bags and universal storage bags). The common of experimental tools A / B / A structure The plastic blown film samples are manufactured by using a layer ratio of a = 150 / 〇 (weight ratio of the total structure) and B = 70ο / 〇 (weight ratio of the total structure). But Table 1 contains resin samples 9, 10 and In the 11 film samples, the layer ratio is: a = 20% and B = 60% »Layer B is ethylene / ι_octene LlDPE has a melt index (i2) of about 1 g / 10 minutes and a density of about 0.92 g / cm3 No additives. In the examples, resins 1-3 are all heterogeneous branched ethylene / i-octene copolymers, resins 4-7 are all homogeneous branched substantially linear ethylene / 1-octene copolymers, and resins 9-11 are all homogeneous branches Linear Ethylene Polymer (HBLEP) »Table 1 summarizes the physical properties of the resin used in the A / B / A coextrusion blown film samples described in the manufacturing examples and comparative examples. Paper rule A Tongchuan China storehouse standard rate (CNS) A4 specification (210X297 mm) -------- install -----: order, ------ line (please read the back first (Notes on this page are reproduced on this page) 24

I U elimination fc aΐ \ 卬 t A7 B7 4〇37〇δ 1 — one one-· »·.,. One _ __ 5. Description of the invention (22)

Remarks: (*) Comparative Example: NM-Unmeasured Resin Nos. 2, 5, 6, and 7 were dry-mixed with 4,000 ppm of oxidized hair and 1200 ppm of erucamide. Resin 3 dry mix contains 6,000 ppm: silica and 1200 ppm erucamide. Resin 4 was dry mixed with 14,000 ppm of silicon dioxide and 1200 ppm of erucamide. Resin 8 is a monolayer milk bag film 'SM3' obtained from DuPont of Canada. It is believed to be about 8% by weight. Low density polyethylene has a density of about 0.92 g / cm3 and about 92% (weight ratio) heterogeneity. Blend of branched linear low-density polyethylene. Resins 9, 10, and 11 were dry-blended to contain 4000 ppm silica and 1,000 ppm erucamide. The final film density of the SM3 film was 0.918 according to DuPont Report G / cm3. Film samples were produced in Egan's three-layer extruder system. Extruder A has a 2.5-inch diameter screw (Bal 2) equipped with Maddox Mixture L / D = 24: 1,60 hp. Extruder B has a 2.5-inch diameter screw (DSB II) equipped with Maddox Mix L / D = 24: 1,75 hp. Extruder C has a 2-inch diameter screw (Modified MHD (Johnson) type); this paper size is Tongzhou Zhongli National Building Standard (CNS) A4 size (210X297 mm) (please read the precautions on the back first, and then «ΐίτpage j -Pei-order '25

^ 0370S A7 B7 V. Description of the invention (23) (Please read the precautions on the back before continuing on this page) We have McDonnell Mixture L / D = 24: 1,20 horsepower drive. The blown film production line is also equipped with an 8-inch three-layer co-extrusion die body, a Gloucester tower, a Sano collapse frame, a Sano bubble screening cage, and a Sano bubble enclosure. Various membrane samples were made to a 3 mil target density using an inflation ratio (BUR) of 2.5: 1. Each film system was tested according to the following test methods: Piercing: The puncturing system was measured using an Instron universal tensile tester with an integrator, a sample holder, and a piercing device. The Instron machine is set to a crosshead speed of 10 inches / minute and a chart recording speed (when in use) of 10 inches / minute. Use a load range of 50% of the load cell capacity (100 lb load in this test). The piercing device is mounted on the Instron machine so the clamping unit is attached to the lower seat and the ball is attached to the upper seat of the crosshead. Use five film samples (6 inches square each). The sample is clamped to the membrane holder, which is firmly fixed to the mounting frame. Crosshead formation was set and continued until the sample broke. Piercing resistance is defined as the volume of the membrane that can be divided by the puncture. The puncture resistance (PR) is calculated as follows: PR = E / ((12) (T) (A)) where PR = penetration resistance (feet-pounds / cubic inch), E = energy (inch-pounds) = Area under the load displacement curve, 12 = inch / feet T = film thickness (inch), and A = film sample area at the chuck = 12.56 square inches; Dart impact resistance: ASTM D1709, method A; Elmendorf's tear resistance: ASTM D1922; This paper is standard; 丨] National standard rate (CNS) A4 specification (210X297 mm) 26 A7 403/08 ____ B7 V. Description of the invention (24) Tensile properties: ASTM D882 uses Instron universal tensile testing machine (cross head speed 500 mm / min, full load 5 grams, threshold = 1% full load, fracture standard is 80% '2 inches meter length and 1 Inch sample width) f Coefficient of friction: ASTM D1894. The range of the coefficient of friction is quite important. Properly move the film on a vertical forming-filling-sealing machine (such as a Hays sen forming-filling-sealing machine): if the coefficient of friction is too low, the film is too slippery to pull the bag. Grasp the film; if the coefficient of friction is too high, the film is too sticky to the machine and the film cannot be pulled through the forming collar; the goals of a typical Heisen forming-filling-sealing machine are: (1) the inside / outside friction coefficient is 0.10-0.30 and (2) Outside / outside friction coefficient is 0.10-0.40; 1% and 2% secant modulus: ASTM D882. Membrane stiffness is important ’especially for the“ self-standing ”bag shown in Figure 2. The 1% and 20/0 secant modulus tests can indicate the rigidity of the film only. 1 Seal strength: This test measures the force required to separate the seal after it has cooled. The seal is manufactured using a DTC thermal tack tester but uses only the heat-sealed portion of the unit. The conditions of use are as follows:

Sample width ·· 24.4 mm seal time: 0.5 seconds seal pressure: 0.27 Newtons / mm / mm number of samples / each time: 5 temperature increments: 5 ° C seal strength using Instron universal tensile testing machine model 1122 Determination of β This paper is the standard China State Standards (CNS) Α4 size (210X297 mm) -------- f meal --------, 玎 ------ ^--(# Read the precautions on the back before writing this page) 27 40370 ^ A7 B7 V. Description of the invention (25 骐 samples are exposed to 50% relative humidity and 231 temperature for 24-48 hours and then tested. Instron test conditions are as follows: (诮 Please read the precautions on the back before filling in this page. ”Pull direction: 90 ° with the sealing angle. Crosshead speed: 500mm / min. Full load (FSL): 5 仟 g threshold: 1% FSL. Breaking standard: 80% meter length. : 2.0 inches and sample width: 1.0 inches; Thermal adhesion performance: The thermal adhesion test measures the force required to separate the heat seal before sealing and cooling. This test simulates using the material to fill the bag just after making the seal.-Order. The heat seal strength is typically the limiting factor for the increase in speed of the production line for bag making and filling operations. The film used DTC in the test Adhesion tester model 52D test. The use conditions are: sample width sealing time fusion sealing pressure delay time tearing speed sample speed / temperature increment temperature Fan Yuan line-24.4 mm 0.5 second 0.27 Newton / mm / mm 0.5 second 150 mm Temperature per second: 5

5 ° C

70〇C-130〇C The thermal adhesion failure of the seal usually occurs in three stages: no seal; the seal is pulled A7 —, -4aaw ___ B7 _____ 5. Description of the invention (26) Open (separation); and the membrane fails (at this time The molten film is pulled apart without significantly affecting the seal). The film failure zone begins where the hot tack strength reaches a maximum. In each case, the film failure occurred just in front of the seal. The force of 1 Newton / inch can be selected arbitrarily to determine the seal starting temperature.

Raw filling: Performance ,: The bag is made of Hayssen Ultima VFFS unit and contains 2 liters of water. The following conditions are used for Heisen: Model: RCMR @ -PRA MANo.U19644 Water quality = 2000 grams bag size = 7 hours X 12.5 leaf film width = 15.25 inches Registration roller: 5 degrees to 135 degrees Pull the bag: 10 degrees to 140 degree knife: 146 degrees to 265 degrees Chuck close: 136 degrees to 275 degrees Platform: 136 degrees to 265 degrees Stager: Off auxiliary parts: 137 degrees to 355 degrees Quali-closing: 140 degrees to 265 degrees Start delay: 50 ms Bag injection: Opening and closing air seal: 200 milliseconds Empty bag / minute: 60 Full bag / minute: 15 This paper is of suitable size; ϊΓ China'CNS) 6 4 size (2) 0x297 mm) ~------ ----------- iri ------- line >-(Please read the precautions on the back before writing this page) 29 A7 B7 4〇37〇〇 -_______________ V. Invention Description (27

Seal Rod Pressure: 150 psi Side Seal Type: Crimp, and Seal Temperature: 260 ° F

Pro / Fill 3000 liquid filling machine attached to VFFS »Pro / Fill 3000 The settings are: PS = 35, volume = 0903, and COA = 70; Manufactured at 280 ° F. About 20 bags are made at this temperature, and then the temperature of the sealing rod is decreased until the seal is no longer filled with water. Five of the 20 bags manufactured at each temperature were randomly selected and used to empty the empty bags. The seal strength was tested under the conditions described in the heat seal strength test on an Instron universal tensile tester model 1122. When the temperature of the sealing rod of the bag is no longer filled with water, it is believed that the pressure pumped into the bag is too large for the hot semi-melt seal. As a result, the bag was separated, and apparently, the bag failed to stick to the temperature. (Read the precautions on the back before you fill out this page).-Λ fr As 1'i: Μ 印

1〇3 · Α7 Β7 V. Description of the invention (28) Table 2 Resin. 1 ** 2 ** 3 ** 8 ** 9 10 11 Average meter (mil) 3.09 3.03 3.04 3.17 249 3.18 2.46 1% secant Chess volume (psi) (MD) (M pa) 31,928 (220) 28,504 (197) 27,873 (192) NM * 21,000 (141) 2,660 (18.3) 28,200 (194) 1% Secant modulus (psi) (CD) (M pa) 39,638 (273) 30,334 (209) 31,274 (216) NM * 29,900 (206) 31,000 (214) 38,000 (262) 2% Secant chess volume (psi) (MD) (M pa) 28,509 (197) 24,218 (167) 23,951 (165) 22,800 (157) 19,400 (134) 23,000 (158.5) 24,800 (171) 2% Secant chess volume (psi) (CD) (M pa) 33,730 (233) 26,087 (180) 26,783 ( 185) 25,449 (175) 25,300 (174) 26,300 (181.2) 31,900 (220) Emmendorf Tear Resistance (XMD) 534 530 524 239 363 317 498 Emmendorf Off (XCD) 654 644 638 394 396 366 718 Dart impact resistance (g) 596 751 889 465 246 202 630 Piercing (tombstone) (Joule may turn 26.0 (2.15) 25.8 (2.13) 26.5 (2.19) 13.8 (1.14) 152.9 (12.6) 139.5 (11.5) 24.2 (2) Tensile drop (psi) (MD) (M pa) 1580 (10.9) 1334 (9.2) 1308 (9) 1558 (10.7) 1.575 (10.8) 1,490 (10.3) 1,530 (10.5) Tensile drop (psi) (CD) (M pa) 1732 (11.9) 1417 (9.8) 1395 (9.6) 1524 (10.5) 1,400 (9.6) 1,500 (10.3) 1,380 (9.5) * NM = Not measured ** Comparative Table 2A resin only) ** 2 ** 3 ** 8 ** 9 10 11 Final tensile strength 5511 (38) 5338 (36.8) 5369 (37) 5639 (38.9 ) 5,920 (40.9) 6,150 (42.2) 6,490 (44.8) Final tensile strength 5768 (39.8) 4873 (33.6) 5145 (35.4) 6173 (42.6) 6,065 (41.9) 5,910 (40.8) 5,700 (39.2) Elongation 685 668 667 761 720 740 700 Elongation (%) (CD) 748 701 719 682 716 780 670 Toughness (feet-pounds / cubic inch) (MD) (Joules / cubic inch) 1364 (113) 1224 (101) 1228 (102) 1562 (129) 1,430 (9.9) 1,620 (11.2) 1,530 (10.6) Toughness (feet-pounds / cubic inch) (CD) (Joules / cubic inch 1549 (128) 1222 (101) 1293 (107) 1569 (130) 1,430 (9.9) 1,680 (11.6) 1,380 (9.5) * NM = Not measured ** Comparative example only -------- 1 ------ 1T ------ ^ I * (诮 Please read the notes on the back before filling this page) This paper is compliant with China National Standard (CNS) A4 size (210 × 25> 7 mm) 31 4〇37〇〇 A7 ------------------------------- B7 V. Explanation of the Invention (29) ~-The data in Tables 2 and 2A show the use of non- Films made from homogeneous branched ethylene / α-olefin copolymers and films made from novel homogeneous branched linear ethylene / α-olefin copolymers have higher puncture resistance than commercially available SM3 films. Similarly, the data also show that films made with heterogeneous branched ethylene / α-olefin copolymers and films made with novel homogeneous branched linear ethylene / β olefin copolymers have higher dart impact strength than commercially available SM3 films. In addition, films made with homogeneously branched linear ethylene olefin copolymers have higher dart impact strength than SM3 films or films made with heterogeneously branched ethylene / a-olefin copolymers. Films made from heterogeneous branched ethylene / a-olefin copolymers and films made from novel homogeneous branched linear ethylene / a-olefin copolymers also have higher tear strength than commercially available SM3 films. Table 3 Thermal Tack Strength (Newton / inch; Newton / 25mm) Temperature ° C (° F) Resin 1 ** Resin 2 ** Resin 3 ** Resin 4 ** Resin Resin 6 ** Resin 7 ** Resin 8 * * Resin 9 Resin 10 Resin 11 55 (131) NA NA NA 0.16 NA NA NA NA NM NM NM 65 (149) NA 0.10 NA 0.66 NA NA NA NM NM NM 70 (158) NA 0.10 0.10 2.83 0.10 NA NA NA NM NM NM 75 (167) NA 0.10 0.90 5.11 0.48 NA NA NA 0.17 NM NM 80 (176) NA 0.30 1.30 5.04 1 1.21 0.10 NA NA 1.07 NM NM 85 (185) NA 0.49 2.10 3.14 2.46 0.20 NA NA 2.89 NM NM 90 ( 194) NA 1.46 2.60 3.80 4.29 0.70 0.10 NA 4.75 0.23 0.81 95 (203) 0 2.19 2.60 3.40 6.41 1.90 0.40 0 8.34 0.85 0.88 100 (212) 0.40 2.78 3.10 3.21 6.95 4.30 0.90 0.30 9.81 3.03 2.33 105 (221) 1.40 3.13 3.10 2.58 6.30 5.40 2.60 1.10 9.12 5.69 4.29 110 (230) 2.90 3.06 3.00 2.39 5.80 5.70 4.20 2.10 8.36 6.83 4.86 115 (239) 3.20 2.62 2.90 2.21 5.00 5.00 4.20 3.40 6.97 5.51 5.53 120 (248) 3.30 2.41 3.00 1.64 4.20 4.20 4.00 3.60 5.49 4.52 4.65 125 (257) 3.00 2.22 2.60 1.73 3.60 3.60 3.30 3.60 4.51 3.75 4.50 130 (266) NM 2.10 NM 1.36 2.90 NM NM 3.50 3.69 3.34 4.25 135 (275) NM NM MM NM NM NM NM NM 3.08 3.05 3.90 140 (284) NM NM NM NM NM NM NM NM 3.04 2.71 3.25 145 (293) NM NM NM NM NM NM NM NM 1.77 2 * 80 2.05 150 (302) NM NM NM NM NM NM NM NM NM 1.77 2.31 1.92 ** Comparative example only NA = Not applicable; NM = Not measured 氺 Paper size Tongzhou 肀 National Standard (CNS) A4 Specifications (210X297 mm) ----------- 0 (Please read the notes on the back before filling this page) 32 —403709 _ ^ _ V. Description of the invention (30) The data in Table 3 shows novel homogeneity Branched linear ethylene / α-olefin copolymers have higher thermal tack strength than films made from homogeneously branched substantially linear ethylene / α-olefin copolymers or heterogeneous branched ethylene / α-olefin copolymers, and compared to commercially available SM3 films Higher hot tack strength. Table 4 Heat seal strength (lbs / inch) Temperature resin resin resin resin resin resin resin resin resin resin ° C (T) 2 ** 3 ** 4 ** 6 ** 7 ** 8 # * 9 10 11 55 ( 131) NA NA NA 0.16 ΝΑ ΝΑ ΝΑ ΝΑ NM NM NM 60 (140) NA NA NA 1.20 ΝΑ ΝΑ ΝΑ ΝΑ NM NM 65 (149) NA NA NA 2.35 ΝΑ ΝΑ ΝΑ ΝΑ ΝΜΝΜ NM 70 (158) NA NA NA 1.87 ΝΑ ΝΑ ΝΑ ΝΑ NM NM NM 75 (167) NA NA 0 1.68 0 ΝΑ ΝΑ ΝΑ NM NM 80 (176) NA 0.09 0.06 2.51 0.54 ΝΑ ΝΑ ΝΑ 0.65 NM NM 85 (185) NA 0.21 0.14 2.67 ΑΝΑ 2.73 NM NM 90 (194) NA 0.10 1.30 2.86 3.90 0 ΝΑ ΝΑ 3.40 NM NM 95 (203) NA 0.61 3.01 2.49 4.18 1.66 ΝΑ ΝΑ 3.57 0.56 0.17 100 (212) NA 1.02 3.87 2.78 5.34 4.60 0 0 4.88 3.46 1.71 105 ( 221) 0.04 4.05 3.90 3.02 5.80 5.03 2.98 0.20 5,28 3.95 2.62 110 (230) 4.26 4.11 3.97 3.41 6.00 6.16 4.97 2.20 5.05 5.28 3.89 115 (239) 4.95 4.34 4.27 3.61 5.50 6.06 5.86 5.10 4.91 5.35 4.15 120 (248) 5.16 4.72 4.65 3.60 5.55 6.24 5.80 7.60 4.60 5 .35 5.25 125 (257) 6.48 5.00 4.80 3.78 5.76 5.50 6.43 8.80 4.86 4.98 5.29 130 (266) 6.61 4.20 4.19 3.84 6.10 5.50 5.90 7.50 4.51 5.60 5.02 135 (275) NM NM NM NM NM NM NM NM NM NM 4.46 4.84 5.53 140 ( 284) NM NM NM NM NM NM NM NM NM 4.86 4.80 4.93 145 (293) NM NM NM NM NM NM NM NM 4.61 5.06 4.52 150 (302) NM NM NM NM NM NM NM NM NM 4.32 5.33 NM ** For comparison only = Not applicable NM = Not measured -------- Ik equipment -------- Order ------ Line- * (诮 Please read the notes on the back before filling in this 莨) Table 4 shows the data Films made with novel homogeneous branched linear ethylene / α-olefin copolymers have higher heat seal strength than films made with heterogeneous branched ethylene / α-olefin copolymers, and compare commercially available SM3 films and use heterogeneous branched ethylene / α-olefin copolymer film made lower heat-seal starting temperature This paper rule is suitable for China National Standards (CNS) A4 (210X297 mm) 403708 A7 B7 V. Description of the invention (3 1 Table 5 2 Hysen heat-sealing strength of liter water bag pounding (Newton / meter) Sealing temperature ° F (° C) Fat 1 * Resin 2 * Resin 3 * Resin 9 Resin 10 Resin 11 180 (82) NA] ΝΑ 0 NM 190 (87) NA] ΝΑ] ΝΑ 1.97 NM NM 200 (93) ΝΑ Ί ~~ ΝΑ Ί ΝΑ 3.52 0 NM 210 (99) NA ΝΑ 0 4.13 2.27 0 220 (104) NA 4.25 (745) 4.46 3.93 2.43 230 (110) NA 4.88 (855) 4.3 (754) 4.17 4.65 3.30 240 (116) 0 4.86 (852) 4.3 ( 754) 3.79 3.75 3.80 250 (121) 5.65 (990) 5.2 (912) 4.07 (713) 4.01 3.50 3.77 260 (127) 5.6 (982) 5.4 (947) 4.28 (750) 3.91 3.78 3.89 270 (132) 5.59 (980 ) 5.15 (903) 4.45 (780) 3.64 3.88 3.85 * Only for comparison example -------- install -------- ^ order --- line (please read the precautions on the back first) Fill in this tile} Part 10 λ .Τ dispense fc ii 卬 Table 5 shows that the film made using the novel homogeneous branched linear ethylene / α-diluted hydrocarbon copolymer has a heterogeneous branched ethylene / α_olefin copolymer made with similar density. The film has a wider sealing range and higher Hessen heat seal strength. The size of this paper is applicable to CNS Α4 size (210X29? Mm) 34

40370S V. Description of the invention (32) Excerpt from Table 6 5 sigh drop test data. Table 6 5 ft drop test resin failure bags% failure 1 * 100 100 2 * 8 8 3 * 3 3 9 0 0 10 3 3 11 25 25 * For comparison only {Please read the precautions on the back before filling in this Page} Although Resin 11 has a similar density as Comparative Resin 1, the percentage failure rate of bags made of Resin 11 is much lower than that of bags made of Comparative Example resin. Similarly, resin 10 and comparative resin 2 have similar densities, but bags made from resin 10 have a lower percentage failure rate than bags made from comparative resin 2. Bags made with resin 11 also have a lower percentage failure rate than bags made with comparative resin 3, even if the resin has a similar density. 35 This paper is suitable for China National Standards (CNS) A4 size (210X297 mm) 403708: B7 V. Description of the invention (33) Component reference 10 bags 11 Tubes 12 Vertical compression seals 13 Horizontal seals 20 bags 21 Tubular member 22 Peripheral fin seal 22a Top seal 22b, 22c Longitudinal side seal 23 Bowl 30 Multi-layer composite film structure 33 Polymer core layer Paper size Applicable to China National Standard (CNS) A4 size (210X297 mm) 36

Claims (1)

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs of the People's Republic of China. A bag made of a structure having at least one film layer comprising: (I) at least one heterogeneous branched linear ethylene / α-olefin heterogeneous copolymer having a weight ratio of 10 to 100%, which is characterized by: (a) a CDBI greater than 50%, and (b) a molecular weight distribution MW / MN ranging from 1.5 to 2.5; and (ii) at least one polymer having a weight ratio of 0 to 90%, which is selected from the group consisting of substantially linear ethylene / (: 3 · (: 2α-olefin heteropolymers, heterogeneous branched linear ethylene / -olefin copolymers, high pressure low density polyethylene and ethylene · vinyl acetate copolymers.) The bag of item No.!, Wherein the film layer containing ⑴ and (π) is a sealing layer. 3. The bag of item No. 2 of the patent application, wherein the film structure has an outer layer containing at least one polymer selected from the group consisting of homogeneous branches real Linear ethylene α-olefin copolymer, heterogeneous branched linear ethylene / 〇3_ € 18〇; _ olefin copolymer, high-pressure low-density polyethylene and ethylene_vinyl acetate copolymer. The membrane structure has a core layer containing high-pressure low-density polyethylene. 5. The bag according to item 1 of the patent application scope, wherein the homogeneous branched linear ethylene / α-olefin copolymer is a copolymer of ethylene and C3-c2Qa · olefin This button standard applies to China National Standard (CNS) A4 specification (210 X 297 male t) 'ri-I A -------- L ------- M (Please read the arm surface first (Please note, please fill out this page again) 37 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 40370δ 6. Application for Patent Scope No. 87112754 Patent Application Amendment of Patent Scope Amendment Date: April 1989 1. A tube-shaped And a bag made of a film structure with a transverse heat-sealed end, the film structure having at least one film layer, the film layer comprising: (I) at least one heterogeneous branched linear ethylene / α-olefin heterogeneous 10 to 100% by weight ratio Copolymer characterized by: (a) large 50% of CDBI, and (b) a molecular weight distribution MW / MN ranging from 1.5 to 2.5; and (ii) at least one polymer with a weight ratio of 0 to 90%, which is selected from the group consisting of substantially linear ethylene / (: 3 · (: 2α-olefin heteropolymers, heterogeneous branched linear ethylene / -olefin copolymers, high-pressure low-density polyethylene, and ethylene-vinyl acetate copolymers. 2. If the scope of patent application is the first! The bag of item 1, wherein the film layer containing ⑴ and (π) is a sealing layer. 3. The bag according to item 2 of the patent application scope, wherein the membrane structure has an outer layer containing at least one polymer selected from the group consisting of a homogeneous branched substantially linear ethylene α-olefin copolymer, and a heterogeneous branched linear ethylene / 〇3_ € 18. _ Olefin copolymer, high pressure low density polyethylene and ethylene_vinyl acetate copolymer. 4. The bag according to item 3 of the patent application, wherein the membrane structure has a core layer containing high-pressure low-density polyethylene. 5. The bag according to item 1 of the patent application scope, wherein the homogeneous branched linear ethylene / α-olefin copolymer is a copolymer of ethylene and C3-c2Qa · olefin. This button scale is applicable to China National Standard (CNS) A4 specification (210 X 297mm t) 'ri-I A -------- L ------- M (Please read the precautions of the arm surface first (Fill in this page again) 37 403708 Scope of patent application. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 6. If the bag of the scope of application for item i is applied, the homogeneous branched linear ethylene / α: -olefin copolymer is a copolymer of ethylene and 1-octene. 7. The bag according to item i of the patent application scope, wherein the homo-f-branched linear ethylene / «-ene tobacco copolymer is a terpolymer of at least one species of c3_C20a women's tobacco. 8. The bag according to item 1 of the scope of patent application, wherein the homogeneous branched linear ethylene / α-olefin copolymer contains less than 0.01 long-chain branches per 1,000 carbons. 9. The bag of item 1 of the scope of patent application, wherein the molecular weight distribution Mw / Mn of the homogeneous branched linear ethylene /?-Olefin copolymer of the same is from 5 to 2.5. '! 〇. The bag according to item i of the patent application range', wherein the homogeneous branched linear ethylene / α-olefin copolymer has a melt flow ratio 11/12 of at least about 7. ". As for the bag of item i of the scope of patent application, wherein the homogeneous branched linear ethylene / 〇: _olefin copolymer of the ⑴ has a melt index L from 〇〇g ❹ ❹ to 10 g / 10 minutes, and the density From 0.90 g / cm3 to 0 g / cm3, the molecular weight distribution is 15 to 25. The flow ratio WI2 is at least about 7. ^ 12. The bag according to the scope of patent application item i, wherein the homogeneous branched linear ethylene / C ^ Cua-olefin copolymer of (11) has a melt index j from g / 10 min to 10 g / 10 min, and Densities range from 〇see / cubic centimeter of water to 0.94 g / cubic centimeter, molecular weight distribution MW / MN * i 5 to 25, and melt flow ratio 110/12 of at least about 7. Take for example the scope of patent application! A bag of items, in which the homogeneous branch of the maggot is solid linear ethylene / CrC2. ^ -Olefin copolymers are also characterized by. + Professional Miscellaneous Standards (CNS) A4 Inspection χ 297 έ .-- · — ik -------- tl .; (Please read the notes on the back before filling this page). 38 A8 B8 C8 D8 403708, patent application scope (a) Density from 0.870 g / cm3 to 0.940 g / m3 (b) Melt index from 0.01 g / 10 minutes to 10 grams / 1 (minutes) (c) from 0.01 long-chain branch / 1000 carbon to 3 long-chain branch / 1000 carbon 14. As the bag of the scope of patent application No. 1 wherein (II ) 'S heterogeneous branched linear ethylene / q-Cua-olefin copolymer has a density of greater than about 087 g / cm3 and a meltdown index from 0.1 to 10 g / 10 minutes. 15. The bag according to item i of the patent application range, wherein the high-pressure low-density polyethylene of ii) has a density of 0.916 to 0.93 g / cm3 and a solution index of 0.1 to 10 g / 10 minutes. 16. The bag according to item 丨 in the patent application range, wherein the (π) ethylene vinyl acetate copolymer has a weight ratio of ethylene to vinyl acetate of 2 2: 1 to 24: 1 and a melt index of 0.2 to 10 g. / 10 minutes. 17. For a bag in the scope of patent application item i, the bag can hold 5 ml to 5000 ml. 18. For a bag in the scope of patent application item i, wherein the bag contains liquid substances "19. In a bag in the scope of patent application claim 15, wherein the mobile material is milk. 20. A method for manufacturing a bag for containing a fluid substance, wherein the bag is prepared from a membrane structure using a forming-filling-sealing machine, and an improvement thereof includes using a membrane structure having at least one membrane layer, the membrane layer comprising: (I) at least one heterogeneous branched linear ethylene / α-olefin heterogeneous copolymer having a weight ratio of 10 to 100%, which is characterized by: (a) a CDBI greater than 50%, and (please read the first Please fill in this page again for attention) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -------- One Order '.1 .Γ ------ Line 1 ------ κ I l · --ί κ ----------- 39 A8 403709 cs _ D8 VI. Patent application scope (b) Molecular weight distribution Mw / Mn range from 1.5 to 2.5; and (Π) at least one 0 to 90% The weight ratio polymer is selected from the group consisting of heterogeneously branched linear ethylene / Cs-Cufl: -olefin copolymers, high pressure low density polyethylene, and ethylene-vinyl acetate copolymers. 21. A method of manufacturing a bag for containing a fluid substance, wherein the bag is prepared from a membrane structure using a forming-filling-sealing machine, and an improvement thereof includes using a membrane structure having at least one membrane layer, the membrane layer comprising: (I) (a) at least one homogeneously branched linear ethylene / α-olefin heteropolymer having a weight ratio of 10 to 100%, which is characterized by having: ⑴ greater than 50% CDBI, and (ii) a molecular weight distribution Mw / Mn ranges from 1.5 to 2.5; and (b) at least one polymer having a weight ratio of 0 to 90%, which is selected from the group consisting of-homogeneously branched substantially linear ethylene / C3-C20a · olefin heteropolymer 'heterogeneously branched linear ethylene / C3-Ct8a-olefin copolymer, high-pressure low-density polyethylene and ethylene-vinyl acetate copolymer; and the at least one layer is printed by a member of the Intellectual Property Office of the Ministry of Economic Affairs and a consumer cooperative (please read first) Please fill in this page again. (II) Heterogeneous branched linear low density ethylene / C3_Ci8a-olefin copolymer 'which has a density greater than about 0.87 g / cm3 and a melt index to 10 g / 10 minutes. 22. If applying for a patent The method of item 21, wherein the film structure comprises at least another layer comprising: (III) the high-pressure low-density polyethylene has a density of 0916 to 093 g / cm3 and a melt index of 0.1 to 10 g / 10 minutes. Standard (CNS) A4 specification (210 X 297 mm) ---- 40