TW542846B

TW542846B - Air and moisture vapor breathable biodegradable films and method of manufacture

Info

Publication number: TW542846B
Application number: TW090118058A
Authority: TW
Inventors: Pai-Chuan Wu; Thomas R Ryle
Original assignee: Clopay Plastic Prod Co
Priority date: 2000-11-22
Filing date: 2001-07-24
Publication date: 2003-07-21
Also published as: AU2001270168B2; MXPA03004503A; AU2001270168B9; AU7016801A; EP1335948A1; PL361022A1; WO2002042365A1; JP2004514756A; KR20030060943A; BR0115472A; AR030336A1; HUP0400310A2; RU2256673C2; CN1596277A

Abstract

Biodegradable films permeable to moisture vapor and air which act as barriers to liquid are made by a high speed method. The films have high moisture vapor transmission rates (MVTRs) on the order of about 1000 to about 4500 g/m<2>/day according to ASTM E96E and air breathability of about 30 to about 2000 cc/cm<2>/min at 90 psi air pressure.

Description

542846542846

相關申請案本發明係爲2_年⑴㈣中請之中請案編號讀8〇,374 的部分連續中請案，其又爲1 9 9 8年5月⑴中請之申請案編號09/080,063及1999年11月14日申請之申請案编號 09/395,627之#分連續中請案。所有前述中請案皆以引用方式完全併入本文中。發明領域本發月有關一種可透空氣及濕氣之生物可分解塑料膜及其製造方法。發明背景製造塑料膜之方法可回溯至許多年前。例如，三十多年則，頒予Troimstme等人之美國專利第3 484 853號（1968)係有關種具有所需之操作特性的壓紋塑料膜，及製造可使用之物件諸如尿布之方法。因爲彼時，於該領域中頒予許多專利。美國專利第4,376，147號（1983)揭示一種壓紋交叉方向（CD)及機械方向（md)薄膜。美國專利第5,202，173號 ( 1993)及第5,296，184( 1994)敎示一種超軟熱塑性薄膜，其係藉著增量地拉伸該壓紋薄膜且形成孔隙而達到透氣性。該薄膜可包含薄膜。聚己内酯（PCL)及澱粉聚合物或聚乙晞醇 (PVOH)之聚合物薄膜於增量拉伸時亦產生可透氣之產物，如美國專利第5,200,247號及第5,407,979號所揭示。最近，美國專利第5,865,926號提出一種製造布狀微孔層積物之方法’該層積物係爲具有透氣及透濕氣性而具有液體障壁性夤之非織造纖雉網的層積物。本紙張尺度適用中國國家標準((：；]^3) A4規格(21〇 X 297公釐) 542846 A7 B7 五、發明説明（2 ) 製造微孔性薄膜產物之方法亦於一段時間之前即已知。例如，Liu之美國專利第3,832,267號敎示一種含有分散之非晶形聚合物相的聚烯烴薄膜之熔體壓紋，之後拉伸或定向以改善該薄膜之氣體及濕氣穿透性。根據Lm ’267專利，具有分散之非晶形聚丙烯相的結晶聚丙烯薄膜係於雙軸抽拉（拉伸）之前先壓紋，以產生具有較大穿透性之經定向非多孔性薄膜。該經分散之非晶形相係用以提供微孔隙，以增加非多孔性薄膜之穿透性，以改善濕氣穿透性（MVT)。 1976年，Schwarz公佈一份文件，其描述用以製造微孔性基材之聚合物掺合物及組合物（Eckhard C.A. Schwartz (Biax-Fiberfilm)，’’New Fibrillated Film Structure, Manufacture and Uses' Pap. Svnth. Conf. ΠΑΡΡΡ. 1976，第 3 3 - 3 9 頁）。根據此份文件，兩種或多種不相容聚合物之薄膜--其中一聚合物形成連續相，而第二種聚合物形成不連續相…在拉伸時會產生相分離，而於聚合物基質中產生孔隙，而增加薄膜之孔隙度。可結晶之聚合物的連續薄膜基質亦可充填無機填料諸如黏土、二氧化鈥、碳酸躬等，以於經拉伸之聚合物基材上提供微孔隙。許多其他專利及公告揭示微孔性熱塑性薄膜產品之現象。例如，歐洲專利141592揭示聚烯烴之用途，尤其是含有分散之聚苯乙烯相的乙烯乙酸乙烯酯（EVA)，其於拉伸時產生孔隙性薄膜，改善該薄膜之濕氣穿透性。此項EP '592 專利亦揭示將EVA薄膜壓紋成具有厚及薄區域，之後拉伸以先提供具有孔隙之薄膜，之後拉伸以產生網狀產物之連本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 542846 A7 一 —___ B7 五、發明説明（3 ) 續步驟。美國專利第4,452,845號及第4,596,738號亦揭示一種經拉伸之熱塑性薄膜，其中分散相可爲充填有碳酸鈣之聚乙烯，以於拉伸時提供微孔隙。美國專利第3,137,746號 :第4,777,〇73號；第4,814，124號；及第4,921，653號揭示前述公告所描述之相同方法，包括先將含有填料之聚烯烴薄膜壓紋，之後拉伸該薄膜以提供微孔產物之步驟。亦頒佈其他專利公告，包括W0 98/23673，其係有關一種熱塑性共聚醋薄膜，具有改良之濕氣穿透率，且係藉著混合共聚酯樹脂與無機填料而製得。生物可分解及/或可製造堆肥產物有助於保持環境資源，且防止生成其他廢棄物。製造者及消費者皆明瞭垃圾場及其他丟棄邵位之有限空間，且可確定地尋求優於生物不可分解及/或不可製造堆肥之產物的生物可分解及/或可製造堆肥產物。生物可分解性及/或可製造堆肥性之需求對於用後丟棄式、高使用性產物諸如嬰兒尿布、女性衛生用品、醫院帷幔及其類者極爲重要。生物可分解及/或可製造堆肥之熱塑性薄膜係先前技藝界已知。削述美國專利第5,407,979號揭示一種包含三種組份之生物可分解熱塑性薄膜：烷醯基聚合物、經破壞之澱粉、及乙烯共聚物。該組份可經擠塑，該薄膜可拉伸以形成透氣性薄膜。美國專利第5,200,247號揭示一種生物可分解熱塑性薄膜，含有烷醯基聚合物/聚乙烯醇（PVA)摻合物。美國專利第5,196,247號揭示一種可製造堆肥之聚合物複合材料板及製造或製造堆肥之方法。 -6- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 裝訂Related Application The present invention is a part of the continuous application for the 2_year application, which has been filed with the number 80,374, which is again the application number 09 / 080,063, which was filed for the application in May 1998 And # 11/1999, Application No. 09 / 395,627 of the application filed on November 14, 1999. All of the foregoing claims are fully incorporated herein by reference. FIELD OF THE INVENTION This invention relates to a biodegradable plastic film that is permeable to air and moisture, and a method for manufacturing the same. BACKGROUND OF THE INVENTION The method of making plastic films dates back many years. For example, for more than thirty years, U.S. Patent No. 3,484,853 (1968) to Troimstme et al. Relates to an embossed plastic film having the required operating characteristics, and a method of making a useful article such as a diaper. Because at that time, many patents were granted in this field. U.S. Patent No. 4,376,147 (1983) discloses an embossed cross direction (CD) and mechanical direction (md) film. U.S. Patent Nos. 5,202,173 (1993) and 5,296,184 (1994) show an ultra-soft thermoplastic film that achieves breathability by incrementally stretching the embossed film and forming voids. The film may include a film. Polycaprolactone (PCL) and starch polymers or polyvinyl alcohol (PVOH) polymer films also produce breathable products during incremental stretching, as disclosed in US Patent Nos. 5,200,247 and 5,407,979. Recently, U.S. Patent No. 5,865,926 proposes a method for manufacturing a cloth-like microporous laminate. The laminate is a laminate of a nonwoven fibrous web having breathable and moisture-permeable properties and liquid barrier properties. This paper size applies to Chinese national standards ((:;) ^ 3) A4 specification (21 × X 297 mm) 542846 A7 B7 V. Description of the invention (2) The method of manufacturing microporous film products has also been available some time ago For example, U.S. Patent No. 3,832,267 to Liu discloses a melt embossing of a polyolefin film containing a dispersed amorphous polymer phase, which is then stretched or oriented to improve gas and moisture permeability of the film. According to the Lm '267 patent, a crystalline polypropylene film with a dispersed amorphous polypropylene phase is embossed before biaxial drawing (stretching) to produce an oriented non-porous film with greater penetration. The dispersed amorphous phase is used to provide microvoids to increase the permeability of non-porous films and improve the moisture vapor transmission (MVT). In 1976, Schwarz published a document describing its use in manufacturing Polymer Blends and Compositions of Microporous Substrates (Eckhard CA Schwartz (Biax-Fiberfilm), "New Fibrillated Film Structure, Manufacture and Uses' Pap. Svnth. Conf. ΠΑΡΡΡ." 1976, pages 3 3-3 9 ). Based on this Document, a film of two or more incompatible polymers-one of the polymers forms a continuous phase and the second polymer forms a discontinuous phase ... phase separation occurs during stretching and is in the polymer matrix Pores are created and the porosity of the film is increased. The continuous film matrix of the crystallizable polymer can also be filled with inorganic fillers such as clay, dioxide, carbonate, etc. to provide microvoids on the stretched polymer substrate. Many other patents and publications disclose the phenomenon of microporous thermoplastic film products. For example, European patent 141592 discloses the use of polyolefins, especially ethylene vinyl acetate (EVA) containing a dispersed polystyrene phase, which is produced during stretching Porous film to improve the moisture permeability of the film. This EP '592 patent also discloses embossing an EVA film with thick and thin areas, and then stretching to provide a film with pores first, and then stretching to produce The paper size of the net-like product is in accordance with the Chinese National Standard (CNS) A4 (210 X 297 mm) 542846 A7 A — ___ B7 V. Description of the invention (3) Continued steps. US Patent No. 4,4 Nos. 52,845 and 4,596,738 also disclose a stretched thermoplastic film in which the dispersed phase may be a calcium carbonate-filled polyethylene to provide microvoids when stretched. US Patent No. 3,137,746: No. 4,777, 〇73 No. 4,814,124; and No. 4,921,653 disclose the same method described in the aforementioned bulletin, including the steps of first embossing a polyolefin film containing a filler and then stretching the film to provide a microporous product. Other patent publications have also been issued, including WO 98/23673, which relates to a thermoplastic copolymerized vinegar film that has improved moisture vapor transmission and is made by mixing a copolyester resin with an inorganic filler. Biodegradable and / or compostable products help preserve environmental resources and prevent the generation of other waste. Manufacturers and consumers are aware of the limited space in dumps and other discard locations, and can definitely look for biodegradable and / or compostable products that are superior to biodegradable and / or non-compostable products. The need for biodegradability and / or compostability is extremely important for post-disposable, highly useable products such as baby diapers, feminine hygiene products, hospital drapery and the like. Biodegradable and / or compostable thermoplastic films are known in the art. Decoding U.S. Patent No. 5,407,979 discloses a biodegradable thermoplastic film containing three components: an alkylene-based polymer, a damaged starch, and an ethylene copolymer. This component can be extruded and the film can be stretched to form a breathable film. U.S. Patent No. 5,200,247 discloses a biodegradable thermoplastic film containing an alkylene-based polymer / polyvinyl alcohol (PVA) blend. U.S. Patent No. 5,196,247 discloses a polymer composite sheet capable of being composted and a method for manufacturing or manufacturing compost. -6- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) binding

542846 A7 B7 五、發明説明（4 ) 所有生物可分解及/或可製造堆肥之柔軟布狀複合材料係揭示於美國專利第5,851，937號中。該複合材料係藉著增量地拉伸整體生物可分解及/或可製造堆肥之非織造網及塑料薄膜之一或多層，以提供柔軟之布狀質感而製得。製造液體障壁性之可透氣薄膜及層積物的方法仍存有缺點，其難以得到具有充分強度之液體障壁薄膜，同時保持生物分解性、透氣性及濕氣穿透性。發明概述本發明有關一種生物可分解薄膜，其係同時可穿透空氣及濕氣，且係液體之障壁。此等薄膜在100下及9 5百分比相對溼度（RH)下，根據ASTM E96E具有高於約1000克（gnls) 每米2每日之濕氣穿透速率（MVTRs)，及於90镑每平方英忖空氣壓力下具有高於約30¾升/厘米2 /分鐘之空氣穿透性。前述專利申請案編號09/080,063及09/480,3 74中，揭示具有高MVTRs之增量拉伸薄膜。此等申請案係有關具有 MVTRs之經增量拉伸之壓紋及未壓紋薄膜的改良，以約 1200至約4500克/米2/每曰爲佳。亦揭示此等薄膜與非織造基材之可透氣層積物。本發明係有關一種生物可分解薄膜及層積物之進一步改良，其同時可透空氣及濕氣。本發明廣義形式中，該生物可分解薄膜係包括生物可分解熱塑性戊基與機械性孔隙形成劑諸如碳酸鈣、二氧化矽及沸石之無機填料的掺合物。該薄膜或層積物中之孔隙形成劑係於拉伸時活化，以增量拉伸爲佳，以形成纖網及薄膜之微孔性薄膜或層積物。該本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公愛) 542846 A7 -— __B7 五、發明説明（5 )''~" 一^—— 生物可分解聚合物諸如聚己内酯（pCL)摻合以可形成薄膜之澱粉聚合物或聚乙晞醇（pvA)適於使用。其他生物可分解聚合物係包括聚交酯（PLA)、聚酯及共聚酯。刀該生物可分解薄膜及層積物可使用於尿佈背襯片、衛生棉及棉墊、及其他醫藥、包裝及外衣。該生物可分解薄膜特別適用於此等及其他類似之應用，因其具有透氣性、透濕氣性及不滲水性。參照以下詳述可進一步明瞭本發明生物可分解薄膜之效果及性質及其製造方法。發明詳述本發明之主要目的係製造透氣性及透濕氣性生物可分解薄膜，其於9〇磅每平方英吋空氣壓力下具有至少約3〇毫升 /厘米2/分鐘之透氣性，及於1〇〇Ίγ&95百分比相對溼度 (RH)下根據ASTM Ε96Ε高於約1〇〇〇克每米2每曰之MVTR。本發明另一目的係製造一種經增量拉伸之生物可分解熱塑性薄膜，其具有正常大小之透氣性質、均勻之孔隙度且不破裂。 A·生常可分解薄膜及層積物材料該生物可分解薄膜组合物可藉著調配生物可分解熱塑性聚合物與適當之添加劑及孔隙形成性填料而達成，提供擠塑物或薄膜.。該薄膜可與非織造網層積。碳酸鈣、硫酸鋇、一氧化碎及〉弗石粒子係最常見之填料。如前所發展，已知提供一種薄膜狀具有不同聚合物相之生物可分解薄膜，以當該薄膜於環境或室溫下拉伸時，產生微孔隙，以提供透氣性及濕氣穿透性。此等方法係描述於美國專利第本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐) 542846542846 A7 B7 V. Description of the invention (4) All soft cloth-like composite materials that are biodegradable and / or compostable are disclosed in US Patent No. 5,851,937. The composite material is produced by incrementally stretching one or more of the entire biodegradable and / or compostable nonwoven web and plastic film to provide a soft cloth-like texture. The method of manufacturing a liquid barrier film and a laminate having liquid barrier properties still has disadvantages, and it is difficult to obtain a liquid barrier film having sufficient strength while maintaining biodegradability, gas permeability, and moisture permeability. SUMMARY OF THE INVENTION The present invention relates to a biodegradable film which is capable of penetrating air and moisture simultaneously and is a liquid barrier. These films have a moisture vapor transmission rate (MVTRs) per day of greater than about 1000 grams (gnls) per square meter under ASTM E96E at 100 and 95 percent relative humidity (RH), and at 90 pounds per square meter. It has an air permeability of more than about 30¾ liters / cm 2 / minute under the air pressure of British Air. The aforementioned patent applications Nos. 09 / 080,063 and 09 / 480,37 74 disclose incrementally stretched films with high MVTRs. These applications are related to improvements in incrementally stretched embossed and unembossed films with MVTRs, preferably about 1200 to about 4500 g / m 2 / day. Breathable laminates of these films and nonwoven substrates are also disclosed. The present invention relates to a further improvement of a biodegradable film and laminate, which is simultaneously permeable to air and moisture. In the broad form of the present invention, the biodegradable film comprises a blend of a biodegradable thermoplastic pentyl and an inorganic filler such as calcium carbonate, silica, and zeolite. The pore-forming agent in the film or laminate is activated upon stretching, and is preferably stretched incrementally to form a microporous film or laminate of the web and film. The size of this paper is applicable to China National Standard (CNS) A4 specification (210 X 297 public love) 542846 A7-__B7 V. Description of the invention (5) '' ~ " A ^ —— Biodegradable polymer such as polycaproline Ester (pCL) starch polymers or polyvinyl alcohol (pvA) blended to form a film are suitable for use. Other biodegradable polymers include polylactide (PLA), polyester, and copolyester. Knife This biodegradable film and laminate can be used in diaper backing sheets, sanitary napkins and pads, and other medicines, packaging and outerwear. The biodegradable film is particularly suitable for these and other similar applications because it is breathable, moisture-permeable, and water-impermeable. The effects and properties of the biodegradable film of the present invention and its manufacturing method can be further understood with reference to the following detailed description. DETAILED DESCRIPTION OF THE INVENTION The main object of the present invention is to produce a breathable and moisture permeable biodegradable film that has an air permeability of at least about 30 ml / cm2 / minute at 90 pounds per square inch of air pressure, and The MVTR is greater than about 1,000 grams per square meter per square meter at 100% γ & 95 percent relative humidity (RH) according to ASTM E96E. Another object of the present invention is to produce an incrementally stretched biodegradable thermoplastic film, which has normal-sized breathable properties, uniform porosity, and does not break. A. Biodegradable film and laminate materials This biodegradable film composition can be achieved by blending biodegradable thermoplastic polymers with appropriate additives and void-forming fillers to provide extruded materials or films. The film can be laminated with a nonwoven web. The most common fillers are calcium carbonate, barium sulfate, pulverized monoxide, and fluorite particles. As previously developed, it is known to provide a film-like biodegradable film with different polymer phases to generate microvoids when the film is stretched at ambient or room temperature to provide breathability and moisture permeability . These methods are described in the U.S. Patent No. 1 Paper Size Applicable to Chinese National Standard (CNS) A4 Specification (210X297 mm) 542846

5,200,247號及第5,407,979號中。才目反地，纟發明係有關無機填料用以於生物可分解薄膜中提供高透氣性及高mvtRs ’同時具有液體障壁性之用途。如蓟所發展，此等及其他目的係於本發明較佳形式下達成，先熔融摻合以下化合物之組合物（昀約4〇重量百分比至約75重量百分比之前述類型生物可分解聚合物，及（b) 約2 5重量百分比至6 〇重量百分比之無機填料粒子，例如碳酸鈣、沸石、二氧化矽、滑石、硫酸鋇、雲母及其類者，之後將含有其他添加劑之經熔融摻合組合物擠塑至一組滾筒夾缝之間，於至少約55〇 fpm至約fpm之大小的速度下形成薄膜，而不使用抽拉共振，於該速度下，沿線實質且均勾地橫跟該薄膜地施加增量拉伸力於該薄膜之整體深度上，以供生物可分解微孔性薄膜。尤其，於較佳形式中，該經熔融摻合之組合物基本上係由約6 0百分比至約7 5百分比之聚酯諸如脂族共聚酯所組成，其係描述於W0 98/23673中，而該描述係以引用方式併入本文。尤其，此等熱塑性共聚酯可包含至少一種脂族二羧酸、至少一種芳族二瘦酸、及至少一種具有4至約個破原子之脂族二醇。或該熱塑性共聚S旨可包含至少一種芳族二羧酸、至少一種脂族二醇及聚烷醚。該脂族二羧酸係選自包括己二酸、戊二酸、環己酸、及其混合物之群；該芳族二羧酸中之至少一種係選自包括對苯二甲酸、異苯二甲酸、莕二甲酸及其混合物之群；脂族二醇中之至少一種係選自包括1，4-丁二醇、環己烷二甲醇、選自包括聚（乙二醇 -9- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 542846 A7 _ B7 五、發明説明（7 ) ^ ^ )、聚（丁二醇）及聚（丙二醇）之群的聚烷醚、及其混合物之群。該熱塑性共聚酯可包含芳族二羧酸、脂族二醇、環脂族二羧酸、聚烷醚及其類者之各種組合物，皆描述於w〇 98/23673公告中，作爲本發明範圍内之共聚酯實例。其他聚合物包括酯-醚聚酯（Hytrel and Amtel);耐綸-醚聚醋（Pebax);聚對苯二甲酸乙二酯（pET);聚乙烯醇（pvA) ;聚己内酯（PCL);澱粉；聚交酯（pLA);澱粉與pvA、 PCL或PLA之摻合物；聚酯諸如聚羥基（丁醛）（pHB)、聚羥基（戊醛）（PHV);及其混合物。較佳係使用約25_4〇百分比之碳酸鈣、二氧化矽、硫酸鋇、或沸石，平均粒徑約丨至約 1 0微米。該生物可分解非織造物可層積於該薄膜上，其較佳係包括美國專利第5,539,081號所揭示之類型的溶融安定之交酉旨聚合物，即聚交酯非織造物（PLA)。所有非織造之纖絲皆完全由乳酸所衍生之聚合物或聚合物混合物製得，即L乳酸、D乳故、或L及D乳酸之混合物。其他生物可分解且/或可製造堆肥之非織造物係包括棉非織造物、纖維素非織造物、脂族-芳族共聚酯、及其掺合物。前述方法中，經熔融摻合之組合物係以網狀槽模擠塑成網，通過由空氣刀所提供之冷卻區，之後進入滚筒夾缝之間，以於高速下形成薄膜。可製造經壓紋或平坦（未壓紋）之薄膜。使用空氣刀，如前文所述，有助於消除抽拉共振，如例如美國專利第4,626,574號所知。此外，如1999年工i 月14日所申請之美國申請案編號09/395,627—以引用方式整 -10- 542846 A7 ______B7 五、發明説明（8 ) " 體併入本文中--所述，使用使冷卻氣流於冷卻區中定向於實質平行與網平面之裝置。例如，可使用美國專利第 4,718，178號及第4，？79,355號所示之裝置，此等專利之整體揭示亦以引用方式併入本文中。冷卻之後，於高速下沿線實質均勻地橫跨該薄膜施加增量之拉伸力於該薄膜或該層積物的整體深度，以提供具有高MVTR及透氣性之經增量拉伸經壓紋或平坦之薄膜。该平坦薄膜係根據本發明原理，在將一網擠塑於具有經拋光之絡表面的滾筒夾缝之間，以形成平坦薄膜。該平坦薄膜在高速下增量拉伸時，產生具有高於1〇〇〇克/米2 /日之南MVTR的微孔性薄膜產物。已發現該平坦薄膜可較經壓紋薄膜更均勻地增量拉伸。該拉伸方法可於環境溫度、室溫、或高溫下進行，如技藝界已知。亦於技藝界已知，”環境 π意指周圍溫度或氛圍，可爲存在於該薄膜周圍之任何程序條件。如前文所述，該微孔性薄膜之層積物可使用非織造纖維網製得。較佳形式中，該微孔性層積物採用具有介於約〇 25及1〇密耳間之隔距或厚度之薄膜，且視用途而定，該薄膜厚度了改’4 ’且取佳在用後丟棄應用中係約q . 2 5至2密耳厚度。該層積片之非織造纖維網一般具有約5克/碼2至75克/碼2之重量，以約20至約40克/碼2爲佳。該複合材料或層積物可於橫向（CD)上增量地拉伸，以形成（：1)經拉伸之複合材料。此外，CD拉伸之後於機械方向（MD)拉伸，以形成同時於CD及MD方向上拉伸之複合材料。如前文所述，該微孔Nos. 5,200,247 and 5,407,979. Contrary to this, the invention is related to the use of organic fillers to provide high gas permeability and high mvtRs' in a biodegradable film while having liquid barrier properties. As developed by thistle, these and other objects are achieved in a preferred form of the present invention. The following compounds are first melt-blended with a composition (about 40 weight percent to about 75 weight percent of the aforementioned types of biodegradable polymers, And (b) about 25% to 60% by weight of inorganic filler particles, such as calcium carbonate, zeolite, silica, talc, barium sulfate, mica, and the like, followed by melt blending with other additives The composition is extruded between a set of roller nips to form a film at a speed of at least about 55 fpm to about fpm, without the use of pull resonance, at which the heel is substantially and uniformly followed along the line The film exerts an incremental tensile force on the overall depth of the film for the biodegradable microporous film. In particular, in a preferred form, the melt-blended composition consists essentially of about 60. Percents to about 75 percent of polyesters, such as aliphatic copolyesters, are described in WO 98/23673, and the description is incorporated herein by reference. In particular, these thermoplastic copolyesters may include at least An aliphatic dicarboxylic acid, at least one aromatic dileic acid, and at least one aliphatic diol having 4 to about one broken atom. Or the thermoplastic copolymer S may include at least one aromatic dicarboxylic acid, at least one lipid Diols and polyalkyl ethers. The aliphatic dicarboxylic acid is selected from the group consisting of adipic acid, glutaric acid, cyclohexanoic acid, and mixtures thereof; at least one of the aromatic dicarboxylic acids is selected from the group including A group of terephthalic acid, isophthalic acid, terephthalic acid, and mixtures thereof; at least one of the aliphatic diols is selected from the group consisting of 1,4-butanediol, cyclohexanedimethanol, and Ethylene glycol-9- This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) 542846 A7 _ B7 V. Description of the invention (7) ^ ^), poly (butanediol) and poly (propylene glycol) ) Group of polyalkyl ethers, and mixtures thereof. The thermoplastic copolyester may include various compositions of aromatic dicarboxylic acids, aliphatic diols, cycloaliphatic dicarboxylic acids, polyalkyl ethers, and the like. Are described in WO98 / 23673 as examples of copolyesters within the scope of the present invention. Other polymers include ester-ether poly (Hytrel and Amtel); Nylon-ether polyacetate (Pebax); Polyethylene terephthalate (pET); Polyvinyl alcohol (pvA); Polycaprolactone (PCL); Starch; Polylactide (pLA ); Blends of starch with pvA, PCL or PLA; polyesters such as polyhydroxy (butyraldehyde) (pHB), polyhydroxy (valeraldehyde) (PHV); and mixtures thereof, preferably using about 25_40% Calcium carbonate, silicon dioxide, barium sulfate, or zeolite, with an average particle diameter of about 1 to about 10 microns. The biodegradable nonwoven can be laminated on the film, and it preferably includes US Patent No. 5,539,081. The type of melt-stabilized cross-linked polymer disclosed is polylactide nonwoven (PLA). All nonwoven filaments are made entirely of polymers or polymer mixtures derived from lactic acid, that is, L lactic acid, D milk, or a mixture of L and D lactic acid. Other biodegradable and / or compostable nonwovens include cotton nonwovens, cellulose nonwovens, aliphatic-aromatic copolyesters, and blends thereof. In the foregoing method, the melt-blended composition is extruded into a net with a mesh-shaped groove die, passes through a cooling zone provided by an air knife, and then enters between the roller nips to form a film at a high speed. Can be embossed or flat (unembossed) film. The use of an air knife, as previously described, helps to eliminate pull resonances, as known, for example, from US Patent No. 4,626,574. In addition, as U.S. Application No. 09 / 395,627 filed on January 14, 1999—by reference -10- 542846 A7 ______B7 V. Description of the Invention (8) is incorporated herein by reference—described, Use a device that orients the cooling airflow in the cooling zone to be substantially parallel to the mesh plane. For example, U.S. Patent Nos. 4,718,178 and 4 ,? No. 79,355, the entire disclosure of these patents is also incorporated herein by reference. After cooling, apply incremental stretching force substantially uniformly across the film at high speed to the overall depth of the film or the laminate to provide incrementally stretched embossing with high MVTR and breathability Or a flat film. The flat film is formed in accordance with the principles of the present invention by extruding a web between roller nips having a polished web surface. When the flat film is incrementally stretched at high speed, a microporous film product having a MVTR of more than 1,000 g / m2 / day is produced. It has been found that the flat film can be stretched more uniformly than the embossed film. The stretching method can be performed at ambient temperature, room temperature, or high temperature, as known in the art. It is also known in the art world that "environment π" means ambient temperature or atmosphere, and can be any program condition that exists around the film. As mentioned earlier, the laminate of the microporous film can be made of a nonwoven fiber web In a preferred form, the microporous laminate uses a film having a distance or thickness between about 025 and 10 mils, and depending on the application, the thickness of the film is changed to '4' and It is best to use a thickness of about .25 to 2 mils in a disposable application. The laminated fibrous web typically has a weight of about 5 grams / yard 2 to 75 grams / yard 2 and a weight of about 20 to About 40 g / yard 2 is preferred. The composite material or laminate can be incrementally stretched in the cross direction (CD) to form (: 1) a stretched composite material. In addition, the CD is stretched and then mechanically stretched. Direction (MD) to form a composite material stretched in both the CD and MD directions. As previously mentioned, the micropores

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542846 A7 B7 五、發明説明（9 ) ' 性薄膜或層積物可使用於許多不同之應用，諸如嬰兒尿布、嬰兒訓練用褲、月經墊及外衣及其類者，其中需要濕氣及S氣穿透性質，及流體障壁性質。 B ·微孔性薄膜及層積物之拉伸可知用數種不同之拉伸器及技術，以拉伸該薄膜或非織造纖維網與可形成微孔之薄膜之層積物。此等短纖維之非織造經梳纖維網或非織造紡黏纖維網之層積物可使用下述拉伸器及技術拉伸： 1 ·房經緯交鱷技伸翠斜向經緯交織拉伸器係由一對位於平行軸上之左手及右手斜齒輪狀元件構成。該軸係配置於兩機械側板之間，下方之軸係位於固定軸承中，而上方之軸係位於可垂直滑動 (疋件中。孩可滑動元件可藉著以調整螺桿操作之楔形元件於垂直方向上調整。將該模旋出或旋出個別於垂直向向下或向上移動該可滑動元件，以使上方經緯交織滾筒之齒輪狀柅齒與下方經緯交織滾筒却接或分離。裝置於側框之微米可操作，顯示該經緯交織滾筒梳齒之啣接深度。使用空氣圓筒以使該可滑動元件保持於其下方又却接位置，其係穩固靠著該調整楔，以對抗欲拉伸材料所產生的向 ί力Ιί!圓筒亦可回縮，以使上下經緯交織滚筒彼此分吏牙線材料經過該經緯交織設備或與人，於啓動時開啓所有機械軋點。口驅動裝置-般個以驅動靜態經緯交織滾筒緯又織滾^分離以進行機械穿線或安全性，則較佳係2 本紙張尺歧财Α4#_ΐ()_ x 297公釐） 12- 542846542846 A7 B7 V. Description of the invention (9) 'Sex film or laminate can be used in many different applications, such as baby diapers, baby training pants, menstrual pads and outerwear and the like, where moisture and S gas are required Penetrating properties, and fluid barrier properties. B. Stretching of microporous films and laminates It is known that several different stretchers and techniques can be used to stretch the laminate of the film or nonwoven web and the microporous film. The laminates of these short fiber non-woven warp fiber webs or non-woven spunbond fiber webs can be stretched using the following stretchers and techniques: It consists of a pair of left-handed and right-handed helical gear-like elements located on parallel axes. The shaft system is arranged between the two mechanical side plates, the lower shaft system is located in the fixed bearing, and the upper shaft system is located in the vertical slide (in the file). The slideable element can be adjusted vertically by the wedge-shaped element operated by the screw. Adjust the direction. Turn the die out or move the sliding element vertically downwards or upwards separately, so that the gear-like teeth of the upper warp and weft interlaced drum are connected or separated from the lower warp and weft interlaced drum. The micrometer of the frame can be operated to show the joint depth of the combing teeth of the warp and weft interweaving rollers. An air cylinder is used to keep the slidable element below but in a connected position, which is firmly against the adjusting wedge to resist pulling The upward force generated by the stretched material can also be retracted, so that the upper and lower warp and weft interlacing rollers can separate the floss material from the warp and weft interlacing equipment or with people, and open all mechanical rolling points at startup. -Normally to drive the static warp and weft interlaced drum weft and weaving ^ Separation for mechanical threading or security, preferably 2 paper ruler Qi Cai Α4 # _ΐ () _ x 297 mm) 12- 542846

五、發明説明（1〇)V. Description of the invention (1〇)

動可藉該經驅動之經緯交織滚筒經由欲拉伸之材料完成。孩經緯交織滾筒極類似細隔距斜齒輪。較佳具體實例中螺旋角，0.100”正常螺距，基本上爲長齒頂末端齒輪。，該滚筒具有5.935’，直徑，45。 3 〇直徑間距，1 4 V2 °壓力角，此情況產生狹窄、深齒之輪廓，得到高達約〇〇9〇，，經緯交織滚筒啣接及約0.005”位於梳齒側面上之材料厚度間隙。该梳齒未設計以傳送轉矩，而於正常經緯交織拉伸操作中金屬不接觸金屬。 2 ·交叉方向經緯交織拉伸器該C D經緯交織拉伸設備與斜向經緯交織拉伸器相同，不同處爲該經緯交織滾筒之設計及下文所述之其他小地方。因爲CD經緯交織元件可具有大値啣接深度，故重要的是該設備收納一個裝置，使該兩經緯交織滾筒之軸在該頂軸升南或降低時保持平行。此需確定一經緯交織滾筒之梳齒始終落於另一經緯交織滚筒之梳齒之間，而避免經緯交織技齒之間的潛在損害性物理性接觸。種平行移動係由一嵩桿及一齒輪配置確定，其中靜態齒輪齒桿係並排地連接於可垂直滑動元件之各側框上。一軸橫越該側框，攜帶各個可垂直滑動之元件進行操作。齒輪停留於此轴之各末端上， -13- 五、發明説明（11 ) 與齒桿啣接地操作，以產生所需之平行移動。上該CD經緯交織拉伸器之驅動^時操作上方及下方經又織滾筒，除經緯交織拉伸之材料具有相當高之摩捧係數以外。然而’該驅動不需反齒隙鄉接，因爲少量之機械方向未杈準或驅動滑動不產生問題。在描述⑶經緯交織之後可明瞭此項因素。該⑶經緯交織元件係自固體材料經機械加工製得，但最佳係爲兩種不同分散物圓盤之交替堆疊物。較佳具體中，該經縴交織圓盤係、爲6"直徑，Q(m,,厚度，α邊緣且有无分半徑。分隔該經緯交織圓盤之間隔圓盤係作”直^ ，及厚度。兩個具有此種結構之滾筒可料交織: 咖"，於所有側面上留下0聊材料間隙。如同斜向經蜂父織扭伸器’該CD經緯交織元件結構具㈣⑽”螺距。 3 ·機械方向經緯交織.jj：彳申界該M D經緯交織拉伸設備係與斜向經緯交織拉仲器相同， =同處係該經緯交織滾筒之設計。該隨經緯交織滾筒極類似細針距正齒輪。較佳具體實例中，該滾筒且有5阳” 直徑，°.100，，螺距，30直徑間距，“V壓力角、，基本上馬長齒頂末端齒輪。於此等滾筒上進行第二程，該滾刀交錯Ο.ΟΚΓ，以提供具有較大間隙之狹“。在約_” = 下’此結構具有約㈣1Q ”位⑭】面上之材料厚度間隙。 4 ·增量拉伸祜術可用以產製經增量之薄膜的層積物，前述斜向、CD或MD經緯交織拉伸器拉伸薄膜或非織造纖維網與可形成微孔 542846 A7The movement can be completed by the warp and weft weaving drum driven by the material to be stretched. The warp and weft interlaced rollers are very similar to fine-pitch helical gears. In the preferred embodiment, the helix angle, 0.100 "normal pitch, is basically a long-tooth tip gear. The drum has a diameter of 5.935 ', a diameter of 45. 30 diameter pitch, a pressure angle of 14 V2 °, this situation produces a narrow, The profile of the deep teeth is as high as about 0,090, the warp and weft interlaced rollers are connected and the material thickness gap on the side of the comb teeth is about 0.005 ". The comb teeth are not designed to transmit torque, and the metal does not contact the metal during normal warp and weft interlaced stretching operations. 2 · Cross-direction warp and weft interlacing stretcher This CD warp and weft interlacing stretcher is the same as the diagonal warp and weft interlacing stretcher. The difference is the design of the warp and weft interlacing drum and other small places described below. Because the CD warp and weft interlacing element can have a large joint depth, it is important that the device houses a device that keeps the axes of the two warp and weft interlacing drums parallel when the top axis is raised or lowered. It is necessary to ensure that the comb teeth of one warp and weft interweave drum always fall between the comb teeth of another warp and weft weave drum, so as to avoid the potentially damaging physical contact between the warp and weft interweave teeth. This kind of parallel moving system is determined by a song bar and a gear configuration. The static gear rack system is connected side by side to each side frame of the vertically sliding element. An axis traverses the side frame, carrying various vertically sliding elements for operation. The gear stays on each end of this shaft. -13- V. Description of the invention (11) Operate with the rack to produce the required parallel movement. When driving the CD warp and weft interlacing stretcher, the upper and lower warp and weaving rollers are operated, except that the warp and weft interlacing and stretching material has a relatively high coefficient of friction. However, the drive does not require backlash connection because a small amount of mechanical direction is not aligned or the drive slides without problems. This factor will become clear after describing the warp and weft interlace. The ⑶ warp and weft interlaced element is made from solid material through mechanical processing, but the best is an alternating stack of two different dispersion discs. In a preferred embodiment, the warp-fiber interlaced disc system is 6 " diameter, Q (m ,, thickness, α edge, and whether there is a sub-radius. The interval disc separating the warp and weft interlaced disc system is "straight ^" Thickness. Two rollers with this structure can be interlaced: coffee ", leaving 0 material gaps on all sides. Like oblique warp-father weaving stretcher 'The CD warp and weft interlacing element structure has a" pitch " 3 · The warp and weft interlacing in the machine direction. Jj: Dai Shenjie The MD warp and weft interlacing and stretching device is the same as the diagonal warp and weft interlacing puller, = it is the same design of the warp and weft interlacing drum. Needle pitch spur gear. In a preferred embodiment, the roller has a 5 ”diameter, ° .100, pitch, 30 diameter pitch,“ V pressure angle, and is basically a long-tooth tip gear. These rollers On the second pass, the hobs are staggered by 〇ΟΚΓ to provide a narrow gap with a large gap. At about _ "= below 'this structure has a gap of material thickness on the plane of about Q1Q ⑭ position]. 4 · 增Volume stretching can be used to produce incremental laminates of films. Diagonal, CD or MD warp and weft interlace stretcher Stretch film or nonwoven web with micropores 542846 A7

發明説明以形成本發明之微孔性薄膜產物。例如，該拉伸操作可使用於短纖維或纺黏纖絲之非織造纖維網及可形成微孔之熱塑性薄膜之擠塑層積物。本發明之獨特態樣中，紡黏纖絲之非織造纖維網的層積物可經增量拉伸，以於該層積物上提供看起來像布之極柔軟纖維整理。該非織造纖維網與可形成微孔之薄膜的層積物係使用例如C D及/ M D經緯交織拉伸器進行增量拉伸，通經該拉伸器一程，滚筒啣接深度約 0 060英吋至0120英吋，速度約55〇 fpm至12〇0 fpm或更快。該增量或經緯交織拉伸之結果，產生具有優越透氣性及液體障壁性之層積物，但提供優越黏合強度及柔款之布狀織物質地。以下實施例係用以説明製造本發明微孔性薄膜及層積物 <方法。就此等實施例及詳述而言，熟習該項技術者已知可在不偏離本發明範圍之情況下進行各種變化。圖式簡單說明圖1係爲實施例1A之薄膜表面於1000X下之顯微相片。圖2係爲實施例1A薄膜於2000X下之剖面顯微相片。圖3係爲實施例1 B薄膜表面於1000X下因爲經緯交織拉伸所致之未拉伸區域的顯微相片。圖4係爲實施例1 B薄膜表面於1000X下因爲經緯交織拉伸所致之經拉伸區域的顯微相片。圖5係爲係爲反應i B薄膜表面於2000X下之經拉伸表面積的顯微相片。 -15- ^張尺度规格⑽環公^ 542846 A7 B7 五、發明説明（13 )DESCRIPTION OF THE INVENTION To form the microporous film product of the present invention. For example, this stretching operation enables extrusion laminates of nonwoven webs of short fibers or spunbond filaments and microporous thermoplastic films. In a unique aspect of the present invention, the laminate of the nonwoven web of spunbond filaments can be incrementally stretched to provide an extremely soft fiber finish on the laminate that looks like a cloth. The laminate of the nonwoven fibrous web and the microporous film can be incrementally stretched using, for example, a CD and / MD warp and weft interlacing stretcher. Through the stretcher, the drum joint depth is about 0 060 inches. Inch to 0120 inches, the speed is about 55 fpm to 12,000 fpm or faster. The result of this incremental or warp-weft interlaced stretching produces a laminate with superior breathability and liquid barrier properties, but provides a cloth-like texture with superior bond strength and softness. The following examples are used to illustrate the method for manufacturing the microporous film and laminate of the present invention. With regard to these examples and detailed descriptions, those skilled in the art know that various changes can be made without departing from the scope of the invention. Brief Description of Drawings Figure 1 is a photomicrograph of the film surface of Example 1A at 1000X. FIG. 2 is a cross-section photomicrograph of the film of Example 1A at 2000X. Fig. 3 is a photomicrograph of an unstretched area caused by warp and weft interlaced stretching at the surface of the B film of Example 1 at 1000X. Fig. 4 is a photomicrograph of the stretched area of the surface of the B film of Example 1 caused by warp and weft interlaced stretching at 1000X. Figure 5 is a photomicrograph of the stretched surface area of the reaction i B film surface at 2000X. -15- ^ Zhang scale specifications ⑽ 公公 542846 A7 B7 V. Description of the invention (13)

實施例1 A及1 B 芳族-脂族型生物可分解共聚酯-充分描述於W0 98/23673 之實施例中一使用於此等實施例中。詳言之，具有此刊物之實施例所描述的代表性生物可分解共聚酯的薄膜，含有約2 5百分比至約4 0百分比之沸石或碳酸鈣，使用習用槽模鑄造薄膜擠塑技術進行擠塑，其係熟習該項技術者已知。尤其，厚度約2密耳（每平方米5 〇克）之薄膜係於約425下-475°F之溶體溫度下擠塑。該薄膜表面之顯微相片係出示於圖1中，而剖面圖係出示於圖2。測試該薄膜，發現其不透氣，但根據ASTM E96E測試方法具有939克/米2/日之 MVTR(濕氣穿透速率）。實施例1 A之薄膜於約7 2 F溫度下增量拉伸時，c d接合 0.070英吋，之後MD接合0.050英吋，如前文所述，變成可透氣，具有較高之濕氣穿透速率。該MVTR自939克/米2 /曰 (實施例1A)增至2350克/米2 /曰（實施例iB)。原始零透氣性之薄膜（實施例1A)透氣性於9 0磅每平方英忖空氣塵力下變成570毫升空氣/厘米2/分鐘。實施例1A及1 B之薄膜表面及剖面的顯微相片確實顯經壓紋之無機粒子（參照圖1 - 5 )。本發明之高MVTR及透氣性生物可分解薄膜確實於增量拉伸時在該無機粒子周圍形成孔隙（參照圖4及5)。但未經拉伸之區域未顯示孔隙形成（參照圖3)。故實施例丨8薄膜之剖面（參照圖5)清楚地顯示該孔隙係連接以使空氣流動。實施例！八薄膜（參照圖2，剖面圖 )中，未有孔隙連接，以使空氣流通經過。 -16- 本紙張尺度適用中國國家標準(CNS) A4規格(21〇 x 297公釐)Example 1 A and 1 B Aromatic-aliphatic biodegradable copolyesters-Fully described in the examples of WO 98/23673-one is used in these examples. In detail, a film having a representative biodegradable copolyester as described in the examples of this publication contains about 25% to about 40% of zeolite or calcium carbonate, and is performed using conventional slot-mold film extrusion technology Extrusion is known to those skilled in the art. In particular, a film having a thickness of about 2 mils (50 grams per square meter) is extruded at a solution temperature of about 425 to -475 ° F. A photomicrograph of the film surface is shown in FIG. 1 and a cross-sectional view is shown in FIG. 2. The film was tested and found to be impermeable, but had an MVTR (moisture vapor transmission rate) of 939 g / m2 / day according to the ASTM E96E test method. When the film of Example A was incrementally stretched at a temperature of about 7 2 F, the cd joint was 0.070 inches, and then the MD joint was 0.050 inches. As described above, it became breathable and had a high moisture penetration rate. . The MVTR was increased from 939 g / m 2 / day (Example 1A) to 2350 g / m 2 / day (Example iB). The original zero air permeability film (Example 1A) had an air permeability of 570 milliliters of air / cm2 / minute at 90 pounds per square inch of air dust. The photomicrographs of the surfaces and cross sections of the films of Examples 1A and 1B did indeed show embossed inorganic particles (see Figures 1-5). The highly MVTR and breathable biodegradable film of the present invention does form voids around the inorganic particles during incremental stretching (see Figs. 4 and 5). Unstretched areas did not show pore formation (see Figure 3). Therefore, the cross section (refer to FIG. 5) of the film of Example 8 clearly shows that the pores are connected to allow air to flow. Example! In the eight films (refer to FIG. 2, cross-sectional view), there are no pores connected to allow air to pass through. -16- This paper size applies to China National Standard (CNS) A4 (21 × 297 mm)

装訂Binding

542846 A7 B7 五、發明説明（14 實施例1 A薄膜之機械性質如下：實施例A 實施例B 1 B / 1 A t匕 #1 總單位重量 (GSM) 50 35 0.7 於90磅每平方英吋下之空氣流動毫升/厘米2/ 分鐘 0 570 00 MVTR(克 / 米 2/ 日）ASTM Ε96Ε 939 2350 2.5 MD極限拉伸（克 /英吋） 1116 885 CD極限拉伸 (克/英吋） 756 661 MD斷裂伸長度 (百分比） 707 494 CD斷裂伸長度 (百分比） 539 436 實施例1 B之生物可分解膜適於作爲尿布背襯、衛生棉、及健康用外衣應用，其中氣流（通風）、高濕氣穿透性、及液體障壁性係爲皮膚護理及穿著時之舒適性所需。實施例2 A - 2 Η 此等實施例中，依相同方式將實施例1 Α所使用之芳族-脂族型共聚酯擠塑成薄膜。此等實施例2 A - 2 Η之薄膜係於 -17- 本紙張尺度適用中國國家標準(CNS) Α4規格(210Χ 297公釐） 542846 A7 B7 五、發明説明（室溫下於C D及/或M D拉伸，以變成透氣且透濕氣之生物可分解薄膜，如下文所示。 _ 實施例增量拉伸(英吋） CD MD 氣流毫升/厘米2/分鐘，90磧每平方英吋空氣濕氣穿透率 E96E 克米2/曰單元重量 (GSM) 拉伸比 (之前/之後） 1Α(參考) 0 0 0 939 50 0 2Α 0.040 0 50 1365 48 1.05 2Β 0.040 0.040 110 1665 45 1.11 2C 0.050 0 140 1665 45 1.11 2D 0.050 0.050 280 2122 39 1.28 2Ε 0.060 0 200 1895 40 1.25 2F 0.060 0.060 490 2350 33 1.51 2G 0.070 0 310 2122 36 1.39 2Η 0.070 0.070 720 2652 29 1.72 其他生物可分解聚合物諸如聚交酯、聚己内酯、澱粉、聚乙烯醇、聚酯、及共聚酯，可使用無機填料粒子處理，以針對前文描述提供透氣且透濕氣之薄膜。就前文描述而言，已知本發明原理之應用可視材料及條件而變化，如熟習該項技術者已知。 -18- 本紙張尺度適用中國國家標準(CNS) Α4規格(210 X 297公釐)542846 A7 B7 V. Description of the invention (14 Example 1 The mechanical properties of the A film are as follows: Example A Example B 1 B / 1 Att # 1 Total Unit Weight (GSM) 50 35 0.7 at 90 pounds per square inch Air flow in ml / cm2 / min 0 570 00 MVTR (g / m2 / day) ASTM Ε96Ε 939 2350 2.5 MD ultimate tensile (g / inch) 1116 885 CD ultimate tensile (g / inch) 756 661 MD elongation at break (percentage) 707 494 CD elongation at break (percentage) 539 436 Example 1 The biodegradable film of Example B is suitable for use as a diaper backing, sanitary napkin, and health garment, where airflow (ventilation), High moisture vapor permeability and liquid barrier properties are required for skin care and comfort during wearing. Examples 2 A-2 Η In these examples, the aromatic used in Example 1 A is similarly used. -Aliphatic copolyester is extruded into a film. These examples 2 A-2 Η film is at -17- This paper size applies Chinese National Standard (CNS) A4 specification (210 × 297 mm) 542846 A7 B7 5 、 Explanation of the invention (Stretched on CD and / or MD at room temperature to become breathable and Moisture biodegradable film, as shown below. _ Examples Incremental stretching (inches) CD MD Air flow ml / cm2 / min, 90 碛 per square inch Air moisture transmission rate E96E gm2 Unit weight (GSM) Stretch ratio (before / after) 1A (reference) 0 0 0 939 50 0 2Α 0.040 0 50 1365 48 1.05 2B 0.040 0.040 110 1665 45 1.11 2C 0.050 0 140 1665 45 1.11 2D 0.050 0.050 280 2122 39 1.28 2E 0.060 0 200 1895 40 1.25 2F 0.060 0.060 490 2350 33 1.51 2G 0.070 0 310 2122 36 1.39 2Η 0.070 0.070 720 2652 29 1.72 Other biodegradable polymers such as polylactide, polycaprolactone, starch, poly Vinyl alcohol, polyester, and copolyester can be treated with inorganic filler particles to provide breathable and moisture permeable films as described above. For the foregoing description, the application of the principles of the present invention is known to vary depending on materials and conditions As known to those skilled in the art. -18- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)

Claims

542846 第090118058號專利申請案中文主m範圍替換本(92年1月) A B c D 止I修磁za 月 ΐ I-.k542846 Patent application No. 090118058 Chinese main m range replacement (January 1992) A B c D Only I repair magnetic za month ΐ I-.k

一生物可分解熱塑性聚合物，含有無機填料粒子之分散相，該薄膜具有液體不滲透之厚度，具有經拉伸區域，以於該薄膜中提供微孔隙度，根據ASTM E96E具有高於 1000克/米2/日之濕氣穿透速率MVTR，且於90磅每平方英吋空氣壓力下具有高於30毫升/厘米2/分鐘之空氣穿透性。 2. 如申請專利範圍第1項之薄膜，其中該生物可分解熱塑性聚合物係選自包括聚己内酯、澱粉、聚乙烯醇、聚交酯、聚酯、及共聚酯、及其混合物之群。 3. 如申請專利範圍第1項之薄膜，其中該填料係選自包括碳酸鈣、二氧化矽、滑石、硫酸鋇、沸石、及雲母、與其混合物之群。 4. 如申請專利範圍第1項之薄膜，其係層積於一生物可分解纖維網上。 5. 如申請專利範圍第4項之薄膜，其中該纖維網之纖維係選自包括纖維素聚合物、聚醋、共聚酯、完全L乳酸之聚合物、完全D乳酸之聚合物、L及D乳酸之共聚物、及 L乳酸與D乳酸之聚合物的摻合物之群。 6. 如申請專利範圍第1項之薄膜，其中該生物可分解熱塑性聚合物係選自包括聚乙烯醇（PVA)、聚己内酯（PCL)、聚交酯（PLA)、澱粉、澱粉與PVA、PCL或PLA之摻合物、聚羥基（丁醛）（PHB)、聚羥基（戊醛）（PHV)、及脂族- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) A B c D 542846 六、申請專利範圍芳族共聚酯、及其混合物之群。 7 .如申請專利範圍第1項之薄膜，其中該微孔性薄膜係具有0.25至10密耳之大小的厚度。 8. 如申請專利範圍第1項之薄膜，其中該微孔性薄膜係具有0.25至2密耳之大小的厚度。 9. 如申請專利範圍第1項之薄膜，其中該根據ASTM E96E 測得之濕氣穿透速率（MVTR)係2000至4500克每米2每曰，而於90磅每平方英吋空氣壓力下之空氣穿透性係200 至1 600毫升/分鐘/厘米2。 1 〇 .如申請專利範圍第1項之薄膜，其中該無機填料係選自包括碳酸鈣、硫酸鋇、雲母、滑石、二氧化矽及沸石之群。 11. 一種高速製造可透氣且可透濕氣而具有液體障壁性之生物可分解熱塑性膜之方法，包括熔融摻合40重量百分比至75重量百分比之生物可分解熱塑性聚合物與2 5重量百分比至6 0重量百分比之無機填料粒子，以形成生物可分解熱塑性聚合物組合物，於至少550 fpm至1200 fpm^L速度下，自槽模擠塑該溶融熱塑性組合物之網，經由冷卻區進入滾筒夾缝之間，以形成具有0.25至10密耳厚度之薄膜，而無抽拉共振，沿線於該速度下實質且均勻橫越該薄膜地，施加增量拉伸力於該薄膜於其整體深度，以提供根據ASTM E96E 具有高於1000克/米2/曰之濕氣穿透速率MVTR，且於90 磅每平方英吋空氣壓力下具有高於30毫升/厘米2/分鐘之本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 空氣穿透性的生物可分解微孔性薄膜。 2.如申請專利範圍第丨丨項之方法，其中該根據ASTM E96E 測得之MVTR係2000至4500克/米2/日，而於9〇磅每平方英吋芝氣壓力下之空氣穿透性係2〇〇至16〇〇毫升/分鐘/厘米2 〇 13·如申請專利範圍第丨丨項之方法，其包括將一生物可分解非織造纖維網導入滾筒夾縫中，控制該壓縮力以使該網 1黏合於該薄膜上，拉伸以形成層積之生物可分解薄膜。 14·如申請專利範圍第11項之方法，其中該生物可分解熱塑 1聚合物係選自包括聚己内酯、澱粉、聚乙缔醇、聚交酯、聚酯、及共聚酯、及其混合物之群。 15·如申請專利範圍第iΗ之方法，其中該填料係選自包括碳酸鈣、二氧化矽、滑石、硫酸鋇、沸石、及雲母、與其混合物之群。 16.如申請專利範圍第丨丨項之方法，其中該纖維網之纖維係選自包括纖維素聚合物、聚酷、共聚酯、完全L乳酸之聚合物、完全D乳酸之聚合物、乳酸之共聚物、及 L乳酸與D乳酸之聚合物的摻合物之群。溲申叫專利範圍第1 1項之方法，其中該生物可分解熱塑合物係選自包括聚乙烯醇（pVA)、聚己内酯（pcL)、聚=酯（PLA)、澱粉、澱粉與PVA、pCL或pLA之摻合物 :永踁基（丁醛）（PHB)、聚羥基（戊醛）（pHv)、及脂族_ 芳族共聚酯、及其混合物之群。 4申α月專利範圍第i i項之方法，纟中該微孔性薄膜係具 542846 8 8 8 8 A B c D 六、申請專利範圍有0.25至10密耳之大小的厚度。 1 9 .如申請專利範圍第Γ 1項之方法，其中該微孔性薄膜係具有0.25至2密耳之大小的厚度。 2 0.如申請專利範圍第1 1項之方法，其中該根據ASTM E96E 測得之濕氣穿透速率（MVTR)係2000至4500克每米2每曰〇 2 1 .如申請專利範圍第1 1項之方法，其中該無機填料係具有 1至1 0微米之平均粒徑，且選自包括碳酸鈣、硫酸鋇、硫酸鋇、二氧化矽及沸石之群。， -4- 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐)A biodegradable thermoplastic polymer containing a dispersed phase of inorganic filler particles. The film has a liquid-impermeable thickness and has stretched regions to provide microporosity in the film. It is higher than 1000 g / m according to ASTM E96E. The moisture permeation rate MVTR is m2 / day, and has an air permeability higher than 30 ml / cm2 / min at 90 psi air pressure. 2. The film as claimed in claim 1, wherein the biodegradable thermoplastic polymer is selected from the group consisting of polycaprolactone, starch, polyvinyl alcohol, polylactide, polyester, and copolyester, and mixtures thereof Group. 3. The film according to item 1 of the patent application range, wherein the filler is selected from the group consisting of calcium carbonate, silicon dioxide, talc, barium sulfate, zeolite, and mica, and mixtures thereof. 4. If the film in the scope of patent application No. 1 is laminated on a biodegradable fiber web. 5. For example, the film of claim 4 in which the fiber of the fiber web is selected from the group consisting of cellulose polymers, polyesters, copolyesters, polymers with completely L lactic acid, polymers with completely D lactic acid, L and A group of copolymers of D lactic acid and blends of polymers of L lactic acid and D lactic acid. 6. The film according to item 1 of the patent application scope, wherein the biodegradable thermoplastic polymer is selected from the group consisting of polyvinyl alcohol (PVA), polycaprolactone (PCL), polylactide (PLA), starch, starch and Blends of PVA, PCL or PLA, polyhydroxy (butyraldehyde) (PHB), polyhydroxy (valeraldehyde) (PHV), and aliphatic-This paper is sized to the Chinese National Standard (CNS) A4 (210 X 297) (Mm) AB c D 542846 6. The scope of patent application for aromatic copolyesters and their mixtures. 7. The film of claim 1 in which the microporous film has a thickness of 0.25 to 10 mils. 8. The thin film of claim 1, wherein the microporous thin film has a thickness of 0.25 to 2 mils. 9. The thin film of claim 1, wherein the moisture transmission rate (MVTR) measured according to ASTM E96E is 2000 to 4500 grams per square meter per second, and at 90 pounds per square inch of air pressure The air permeability is 200 to 1 600 ml / min / cm2. 10. The film according to item 1 of the patent application range, wherein the inorganic filler is selected from the group consisting of calcium carbonate, barium sulfate, mica, talc, silica and zeolite. 11. A method of manufacturing a biodegradable thermoplastic film that is breathable and moisture permeable and has liquid barrier properties at high speed, comprising melt blending a biodegradable thermoplastic polymer of 40 to 75 weight percent with 25 to 50 weight percent to 60% by weight of inorganic filler particles to form a biodegradable thermoplastic polymer composition. At a speed of at least 550 fpm to 1200 fpm ^ L, the web of the molten thermoplastic composition is extruded from a slot die, and enters the drum through a cooling zone. Between the slits to form a film with a thickness of 0.25 to 10 mils without pulling resonance, along the line at the speed substantially and uniformly across the film, applying incremental tensile force to the film at its overall depth In order to provide the paper size according to ASTM E96E, which has a moisture transmission rate MVTR higher than 1000 g / m2 / y, and higher than 30 ml / cm2 / min at 90 psi air pressure Chinese National Standard (CNS) A4 (210 X 297 mm) Air-permeable biodegradable microporous film. 2. The method according to item 丨丨 of the patent application range, wherein the MVTR measured according to ASTM E96E is 2000 to 4500 g / m2 / day, and the air penetrates at 90 psig pressure Properties: 2000 to 1600 ml / min / cm2. The method according to item 丨丨 of the patent application scope includes introducing a biodegradable nonwoven web into a roller nip, controlling the compression force to The web 1 is adhered to the film and stretched to form a laminated biodegradable film. 14. The method according to claim 11 in which the biodegradable thermoplastic 1 polymer is selected from the group consisting of polycaprolactone, starch, polyethylene glycol, polylactide, polyester, and copolyester, And its mixtures. 15. The method according to claim i, wherein the filler is selected from the group consisting of calcium carbonate, silicon dioxide, talc, barium sulfate, zeolite, and mica, and mixtures thereof. 16. The method of claim 丨丨, wherein the fiber of the fiber web is selected from the group consisting of cellulose polymers, polyesters, copolyesters, polymers with completely L lactic acid, polymers with completely D lactic acid, and lactic acid A copolymer of L-lactic acid and a polymer of D-lactic acid. The method called item 11 of the patent scope, wherein the biodegradable thermoplastic is selected from the group consisting of polyvinyl alcohol (pVA), polycaprolactone (pcL), poly = ester (PLA), starch, starch Blends with PVA, pCL or pLA: Groups of perylene (butyraldehyde) (PHB), polyhydroxy (valeraldehyde) (pHv), and aliphatic-aromatic copolyesters, and mixtures thereof. 4 The method of applying for item i i of the patent range of α month, in which the microporous film is 542846 8 8 8 8 A B c D 6. The scope of patent application has a thickness of 0.25 to 10 mils. 19. The method according to item Γ1 of the patent application range, wherein the microporous film has a thickness of 0.25 to 2 mils. 2 0. The method according to item 11 of the patent application range, wherein the moisture vapor transmission rate (MVTR) measured according to ASTM E96E is 2000 to 4500 g per meter 2 per day. 1 The method according to item 1, wherein the inorganic filler has an average particle diameter of 1 to 10 micrometers and is selected from the group consisting of calcium carbonate, barium sulfate, barium sulfate, silica and zeolite. , -4- This paper size applies to China National Standard (CNS) A4 specification (210X297 mm)