CN110603287A - 不可萃取且不含纤维的食物除油膜及其制作方法 - Google Patents

不可萃取且不含纤维的食物除油膜及其制作方法 Download PDF

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CN110603287A
CN110603287A CN201880030133.XA CN201880030133A CN110603287A CN 110603287 A CN110603287 A CN 110603287A CN 201880030133 A CN201880030133 A CN 201880030133A CN 110603287 A CN110603287 A CN 110603287A
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film
extractable
fiber
free food
oiling
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阿索恩·威奇塔莫诺
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Enzpier Industrial Co Ltd
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Enzpier Industrial Co Ltd
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Abstract

本发明提供一种不可萃取且不含纤维的食物除油膜，其为一种柔性材料，具有用于去除烹煮食物中的油的呈微孔结构的多个开放小格。所述塑料膜由聚丙烯聚合物、特定碳原子烯烃填充剂和成核剂的混合物制成。所述混合物通过管状吹膜挤出机增塑并形成为管状膜基材，然后通过特定的热水等静压技术执行双轴拉伸，从而形成许多光滑、均匀、亲脂、多孔的结构，所述结构吸附并截留烹煮食物中的一切种类的油。膜以各种形式应用，具体因其用途而异，所述形式有片材、穿孔卷材等，或通过层压方法层压在其他功能基材上以形成新型食物包装。

Description

不可萃取且不含纤维的食物除油膜及其制作方法
技术领域
本发明涉及一种塑料膜包装，其用于安全地去除烹煮食物中的过量的油。
背景技术
油腻食物可能美味，但过量的油摄入会导致健康风险，诸如肥胖症、高血压和心脏病。因此，许多技术被应用来降低烹煮食物中的过量的食物油。
有一些通用措施可用于去除烹煮食物中的过量的油，主要是通过基本物理分离，诸如用滤网排掉炸油、撇掉或排掉肉汤上的浮油层。但是，在以上述方法处理之后烹煮食物有时依然油腻。因此，便要应用另一个步骤，该步骤利用吸附材料(尤其是吸油片材)来除掉剩余的油。
当前市面上使用的吸油片材可按其结构类型分类：
a.纤维素纸
当前，一些类型的纤维素辐材，诸如纸巾、薄绵纸，被用来去除油腻食物中的过量的油，其中物理毛细力在吸油并将油截留到其空隙中扮起着主要作用，同时，在化学上，沿纤维素链的羟基则大量吸水。这样，油和水都被吸入辐材中，其中吸附的水将降低辐材的机械强度，进而引起裂开并失去其短纤维缠结，从而污染到烹煮食物。
b.聚烯烃无纺辐材
与纤维素纸不同，聚烯烃无纺辐材由合成纤维(尤其是聚丙烯长丝)制成。这些塑料纤维辐材不吸水，而是选择性地仅吸油。但是，它们的辐材结构较细且结合松散，往往容易损坏并失去纤维，从而像上文所述的纤维素纸那样，污染到烹煮食物。
然而，通过全球专利检索，有一些膜制品包含与本发明的不可萃取且不含纤维的食物除油膜的组分相近的组分，具体如下：
专利公开WO2007046225《微孔聚丙烯膜及其制作过程》公开了由聚丙烯、β晶体的成核剂、乙烯/α-烯烃共聚物组成的微孔聚丙烯膜；
日本专利公开JP2016037586《从聚丙烯组合物得到的膜或片材》公开了含有丙烯共聚物、α-烯烃、使用双轴拉伸工艺制作的成核剂的聚丙烯膜；
专利公开CA2001234《聚丙烯拉伸膜》定义了包含聚丙烯以及用作成核剂的烯烃的聚丙烯膜，该聚丙烯膜具有至少6个碳原子；
加拿大专利公开WO200715415《聚丙烯树脂组合物、膜或片材、从此类膜或片材得到的拉伸膜、多层体、以及从此类多层体得到的拉伸膜》公开了包含丙烯聚合物和烯烃共聚物的聚丙烯树脂；
日本专利公开JP2017109371《双轴定向离型膜》公开了包含聚丙烯以及使用双轴定向工艺制得的α-烯烃的聚丙烯膜；以及
加拿大专利公开CA2017246《聚丙烯拉伸膜》讨论了包含聚丙烯和成核剂的聚丙烯膜。
从上述引用专利可见，几乎所有引用专利都包含对保存食物和吸附食物中过量的油或脂肪起着一定作用的膜。在使用一段时间之后，存在纤维通过与食物接触而引起污染的一些问题。
虽然吸油片材可降低油腻食物中的过量的油，但纤维素纸和塑料纤维辐材在市面上仍未广泛使用，这归因于它们有关卫生和安全的某些缺点，尤其是在纤维污染担忧方面。根据本发明的不可萃取且不含纤维的食物除油膜不仅能够作为出色的吸油材料，而且还解决了纤维污染问题。另外，还选择了特定的不可萃取添加剂和填充剂以通过膜组合物的特定碳原子范围来确保它们卫生且安全地用作直接食物接触式除油膜。
发明内容
因此，本发明是一种柔性塑料膜，该塑料膜具有用于去除烹煮食物中的油的呈微孔结构的多个开放小格，该塑料膜由聚丙烯聚合物、特定烯烃填充剂和成核剂的混合物制成。混合物通过吹膜挤出机增塑并形成为管状膜基材，然后通过特定的热水等静压技术执行双轴拉伸，从而形成许多光滑、均匀、亲脂、多孔的结构，这些结构将吸附并截留烹煮食物中的一切种类的油。
该膜与现有技术的膜的不同之处在于组分、组分的比率、以及明显不同的每种膜组分的特性，即，熔体流动速率在0.1-5.0克/10分钟的范围内的等规聚丙烯聚合物以及碳原子在29至200范围内的经选择的烯烃填充剂，这就解决了烯烃填充剂迁移或溶出的问题。
总之，本发明的膜有助于防止食物因膜的某些部分而受到污染，即现有技术中出现的纤维污染。此外，根据本发明的膜能够保持食物具有较低的油，同时不吸水。因此，它提供了更健康的卫生食物以及用于去除烹煮食物中的过量油的安全选择。
具体实施方式
不可萃取且不含纤维的食物除油膜是一种柔性材料，其具有用于去除烹煮食物中的油的呈微孔结构的多个开放小格，该膜由混合物制成，该混合物包含：
a.浓度为65-75wt％且熔体流动速率在0.1-5.0克/10分钟的范围内的等规聚丙烯聚合物
b.碳原子数在C29至C200范围内的浓度为25-35wt％的烯烃填充剂
c.浓度为100-2,500ppm的成核剂，所述成核剂可选自山梨糖醇衍生物或苯基三酰胺衍生物或它们的组合。
不可萃取且不含纤维的食物除油膜可以选自片材或穿孔卷材或层压多层膜或它们的组合的形式应用。
不可萃取且不含纤维的食物除油膜的制作方法包括以下步骤：
a.通过管状吹膜挤出机增塑混合物并形成为具有透明且细密分散的多相结构的管状吹膜基材；以及
b.通过特定的热水等静压拉伸装置同时双轴拉伸基材以形成经加工的膜，该热水等静压拉伸装置在管状吹膜气泡中容装有温度在50至100摄氏度范围内的加压热水。
加压热水的体积在横向上拉伸或拖拽所述膜，并扩展塑料膜气泡直径，从而决定膜厚度、平铺宽度以及横向拉膜百分比。同时，一系列轧辊中的每组轧辊向前越来越快地旋转，从而决定膜厚度和纵向拉膜百分比。经加工的膜可为单层或多层管状吹膜基材，具体因其最终用途而异。
在双轴拉伸过程结束后，膜外观变成不透明的光滑膜，该膜具有呈微孔结构的多个开放小格，所述开放小格均匀分散在整个膜结构上。为了实现高吸油性能，在两个方向(纵向和横向)上的双轴拉伸或拉膜百分比在150％至500％的范围内。经加工的膜在双轴拉伸之后具有在整个膜体积的30％至60％范围内的空隙体积。两个方向上的拉膜百分比的差异会影响成品特性和性能。
对于所有膜应用和形式，诸如片材、穿孔卷材或层压多层膜，横向拉膜百分比与纵向拉膜百分比的比率在0.7至1.2的范围内。当膜以穿孔卷材形式应用来应用以确保沿横向穿孔线形成轻松且光滑的撕裂时，所述比率优选在1.0至1.2的范围内。
对于另一应用——成形灌装密封(FFS)食物包装，膜可通过层压方法层压或结合在其他功能基材上，其中结合面积在1％至40％的范围内。层压方法可选自热熔层压或粘合层压或它们的组合。所述层压方法以经布置的离散模式提供以形成具有吸油衬里的新型食物包装。油炸小吃中的过量的油将被吸附并截留在内部，从而使油炸食物或小吃更酥脆且更健康。

Claims (14)

1.一种不可萃取且不含纤维的食物除油膜，其为一种柔性材料，具有用于去除烹煮食物中的油的呈微孔结构的多个开放小格，所述膜由混合物制成，所述混合物包含：
a.浓度为65-75wt％的等规聚丙烯聚合物
b.碳原子数在C29至C200范围内的浓度为25-35wt％的烯烃填充剂
c.浓度为100-2,500ppm的成核剂。
2.根据权利要求1所述的不可萃取且不含纤维的食物除油膜，其中所述等规聚丙烯聚合物具有在0.1-5.0克/10分钟的范围内的熔体流动速率。
3.根据权利要求1所述的不可萃取且不含纤维的食物除油膜，其中所述成核剂选自山梨糖醇衍生物或苯基三酰胺衍生物或它们的组合。
4.根据权利要求1所述的不可萃取且不含纤维的食物除油膜，其中所述膜以选自片材或穿孔卷材或层压多层膜或它们的组合的形式应用。
5.一种不可萃取且不含纤维的食物除油膜的制作方法，其包括以下步骤：
a.通过管状吹膜挤出机增塑所述混合物并形成为具有透明且细密分散的多相结构的管状吹膜基材；以及
b.通过特定的热水等静压拉伸装置同时双轴拉伸所述基材以形成经加工的膜，所述热水等静压拉伸装置中容装有热水。
6.根据权利要求5所述的不可萃取且不含纤维的食物除油膜的制作方法，其中所述热水具有在50至100摄氏度范围内的温度。
7.根据权利要求5所述的不可萃取且不含纤维的食物除油膜的制作方法，其中所述双轴拉伸具有在150％至500％范围内的纵向拉膜百分比。
8.根据权利要求5所述的不可萃取且不含纤维的食物除油膜的制作方法，其中所述双轴拉伸具有在150％至500％范围内的横向拉膜百分比。
9.根据权利要求5所述的不可萃取且不含纤维的食物除油膜的制作方法，其中对于所有膜应用和形式，所述双轴拉伸的所述横向拉膜百分比与所述纵向拉膜百分比的比率在0.7至1.2的范围内。
10.根据权利要求5所述的不可萃取且不含纤维的食物除油膜的制作方法，其中当膜以穿孔卷材形式应用时，所述双轴拉伸的所述横向拉膜百分比与所述纵向拉膜百分比的比率优选在1.0至1.2的范围内。
11.根据权利要求5所述的不可萃取且不含纤维的食物除油膜的制作方法，其中所述经加工的膜在所述双轴拉伸之后具有在整个膜体积的30％至60％范围内的空隙体积。
12.根据权利要求5所述的不可萃取且不含纤维的食物除油膜的制作方法，其中所述经加工的膜通过层压方法层压或结合在其他功能基材上，其中结合面积在1％至40％的范围内。
13.根据权利要求12所述的不可萃取且不含纤维的食物除油膜的制作方法，其中所述层压方法选自热熔层压或粘合层压或它们的组合。
14.根据权利要求12所述的不可萃取且不含纤维的食物除油膜的制作方法，其中所述层压方法优选以经布置的离散模式提供。
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