CN106113856A - 一种未拉伸聚丙烯薄膜 - Google Patents
一种未拉伸聚丙烯薄膜 Download PDFInfo
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
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- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/242—All polymers belonging to those covered by group B32B27/32
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2310/00—Treatment by energy or chemical effects
- B32B2310/14—Corona, ionisation, electrical discharge, plasma treatment
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Abstract
一种未拉伸聚丙烯薄膜,由A:电晕层/B:中间层/C:热封层三层结构组成,其特征在于,所述的三层结构的层厚比例分别为:A:电晕层5%‑60%;B:中间层10%‑80%;C:热封层5%‑60%。本发明所选用原料均不含爽滑剂成分,可提供薄膜高摩擦系数性能;电晕层加入一定比例成核剂,可改善结晶性能,提高薄膜透明度;热封层选用茂金属丙烯共聚物,可降低薄膜热封温度,同时也可提高薄膜透明度。
Description
技术领域
本发明涉及一种用于印刷、复合、包装领域,具体涉及一种具有高摩擦系数、高透明、低温热封的未拉伸聚丙烯薄膜。
背景技术
目前的食品包装行业,对包装要求越来越高。如蛋糕、面包类食品的自动化包装机械,对包装材料的主要要求体现在三个方面:一是要求薄膜具有低温热封性能,以提高包装速度和降低能源消耗;二是要求能够清晰的看到包装内容物,这就要求包装材料必须具有很高的透明性和光泽度;三是要求薄膜具有高摩擦系数,包装内容物在薄膜上不能打滑,否则影响自动包装效率。普通未拉伸聚丙烯薄膜则无法兼具低温热封、高透明和高摩擦系数三个性能指标。
发明内容
本发明的目的在于针对上述问题而提供一种具有高透明、高摩擦系数和低温热封性能的未拉伸聚丙烯薄膜。
通过以下技术方案实现:
一种未拉伸聚丙烯薄膜,由A:电晕层/B:中间层/C:热封层三层结构组成,所述的三层结构的层厚比例分别为:
A:电晕层5%-60%;
B:中间层10%-80%;
C:热封层5%-60%。
所述的电晕层由均聚聚丙烯、共聚聚丙烯或二者的共混物及成核剂共混组成;其中,聚丙烯占98-99wt%,成核剂占1-2wt%。
对电晕层表面进行电晕处理,以增加复合强度。
所述中间层由均聚聚丙烯组成。
所述均聚聚丙烯为只含抗氧剂和氯俘获剂的等规均聚聚丙烯。
所述热封层由丙烯共聚物组成,丙烯共聚物的种类包括茂金属丙烯-乙烯共聚物,丙烯-丁烯共聚物,丙烯-乙烯-丁烯三聚物或丙烯-乙烯-辛烯三聚物,用于此层的防粘剂可以防止膜与膜的粘连,其中,丙烯共聚物占95%-98wt%,防粘剂占2%-5wt%。
所述的薄膜厚度范围为10-80微米。
所述的薄膜厚度范围为18-60微米。
所述的薄膜,具有高透明、高摩擦系数和低温热封性能,30微米厚度的薄膜雾度实测值1.2%,动摩擦系数0.7,起封温度124℃。
本发明的有益效果:本发明所选用原料均不含爽滑剂成分,可提供薄膜高摩擦系数性能;电晕层加入一定比例成核剂,可改善结晶性能,提高薄膜透明度;热封层选用茂金属丙烯共聚物,可降低薄膜热封温度,同时也可提高薄膜透明度。本发明制备的未拉伸聚丙烯薄膜兼具低温热封、高透明和高摩擦系数三个性能指标,综合性能好,而且成本较低。
附图说明
图1为本发明所述的一种未拉伸聚丙烯薄膜结构示意图。
具体实施方式
本发明选取的主要材料举例如下,相同材质的原料有多家厂商生产,但不限于此。
1# 中国,金山石化,FC801MX,等规均聚聚丙烯,含300ppm的抗粘剂,不含爽滑剂。TM(melt point)=162℃,MI=8.0
2# 日本,三井,WFX4T,茂金属共聚聚丙烯,不含抗粘剂,不含爽滑剂。
TM(melt point)=125℃,MI=7.0
3# 新加坡,TPC,FL7540L,聚丙烯共聚物,含抗粘剂,不含爽滑剂。TM(melt point)=138℃,MI=7.5
4# 美国,舒尔曼,NA10942,成核剂,有效成分为有机物,有效成分占10%。
5# 日本,三井,EAZ-10,合成硅石,有效成分占10%。
本发明所选用原料均不含爽滑剂成分,可提供薄膜高摩擦系数性能;电晕层一定比例成核剂,可改善结晶性能,提高薄膜透明度;热封层选用茂金属丙烯共聚物,可降低薄膜热封温度,同时也可提高薄膜透明度。
本发明的最好实施方式为(薄膜结构:电晕层/中间层/热封层):
实施例1
3#98%+4#2.0% / 1#100% / 3#49%+2#49%+5#2%
实施例2
1#49%+3#49%+4#2.0% / 1#100% / 3#49%+2#49%+5#2%
实施例3
1#98%+4#2% / 1#100% / 2#100%2#98%+5#2%
实施例4
1#98%+4#2% / 1#100% / 3#49%+2#49%+5#2%
出于对薄膜润湿张力保持能力、热封性能、制造成本等综合质量因素的考虑,实施实例4效果较好。
本发明的未拉伸聚丙烯薄膜厚度范围为70微米,优选厚度范围为45微米,其中:电晕层占薄膜总厚度的45%,中间层占20%,热封层占35%。
进一步地,一种未拉伸聚丙烯薄膜,热封层三层结构组成,所述的三层结构的层厚比例分别为:
A:电晕层30%;
B:中间层40%;
C:热封层30%。
Claims (9)
1.一种未拉伸聚丙烯薄膜,由A:电晕层/B:中间层/C:热封层三层结构组成,其特征在于,所述的三层结构的层厚比例分别为:
A:电晕层5%-60%;
B:中间层10%-80%;
C:热封层5%-60%。
2.根据权利要求1所述的一种未拉伸聚丙烯薄膜,其特征在于,所述的电晕层由均聚聚丙烯、共聚聚丙烯或二者的共混物及成核剂共混组成;其中,聚丙烯占98-99wt%,成核剂占1-2wt%。
3.根据权利要求2所述的一种未拉伸聚丙烯薄膜,其特征在于,对电晕层表面进行电晕处理,以增加复合强度。
4.根据权利要求1或2所述的一种未拉伸聚丙烯薄膜,其特征在于,所述中间层由均聚聚丙烯组成。
5.根据权利要求4述的一种未拉伸聚丙烯薄膜,其特征在于,所述均聚聚丙烯为只含抗氧剂和氯俘获剂的等规均聚聚丙烯。
6.根据权利要求1、2、3或5述的一种未拉伸聚丙烯薄膜,其特征在于,所述热封层由丙烯共聚物组成,丙烯共聚物的种类包括茂金属丙烯-乙烯共聚物,丙烯-丁烯共聚物,丙烯-乙烯-丁烯三聚物或丙烯-乙烯-辛烯三聚物,用于此层的防粘剂可以防止膜与膜的粘连,其中,丙烯共聚物占95%-98wt%,防粘剂占2%-5wt%。
7.根据权利要求6所述的一种未拉伸聚丙烯薄膜,其特征在于,所述的薄膜厚度范围为10-80微米。
8.根据权利要求7所述的一种未拉伸聚丙烯薄膜,其特征在于,所述的薄膜厚度范围为18-60微米。
9.根据权利要求7或8所述的一种未拉伸聚丙烯薄膜,其特征在于,所述的薄膜,具有高透明、高摩擦系数和低温热封性能,30微米厚度的薄膜雾度实测值1.2%,动摩擦系数0.7,起封温度124℃。
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Cited By (2)
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CN108162534A (zh) * | 2017-12-29 | 2018-06-15 | 雷诺丽特朗活医药耗材(北京)有限公司 | 一种三层共挤吹塑聚丙烯薄膜及其制备方法与应用 |
CN109228595A (zh) * | 2018-09-11 | 2019-01-18 | 嘉兴鹏翔包装材料有限公司 | 一种充气包装用高透明cpp薄膜 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108162534A (zh) * | 2017-12-29 | 2018-06-15 | 雷诺丽特朗活医药耗材(北京)有限公司 | 一种三层共挤吹塑聚丙烯薄膜及其制备方法与应用 |
CN109228595A (zh) * | 2018-09-11 | 2019-01-18 | 嘉兴鹏翔包装材料有限公司 | 一种充气包装用高透明cpp薄膜 |
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Application publication date: 20161116 |