Hot water-resistant biaxially oriented polypropylene (BOPP) thermosensitive film and manufacturing method thereof
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A manufacturing method and technology of hot water, applied in chemical instruments and methods, papermaking, textiles and papermaking, etc., can solve the problems of coating peeling, non-normal use, fading, etc., to achieve excellent hot water performance, excellent resistance to water. Dry and wet friction, good anti-stick function
Inactive Publication Date: 2019-07-02
JIANGSU WANBAO RUIDA HI TECH CO LTD
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[0005] At present, BOPP thermal film products on the market have different performances in terms of hot water resistance. Some products are seriously peeled off in high-temperature hot water, some barcode texts are seriously faded, and some fade with the increase of water temperature. The color is seriously grayed and blackened, and cannot be used normally
There are only a few foreign products that have a firm coating and a good background color, but there is still unavoidable fading
Method used
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Embodiment 1
[0036] As mentioned above, the hot water resistant BOPP thermal film manufacturing process includes the following steps:
[0037] (1) Choose BOPP film with two smooth surfaces as the coating substrate, and the weight is 55g / m 2 ;
[0038] (2) Preparation of connecting layer coating solution: Add appropriate amount of water into the batching tank, start stirring, add hydroxyl-containing self-crosslinking acrylate emulsion, CMC, defoamer, lubricant, polyisocyanate, and stir for 20 minutes under low-speed stirring conditions , forming a connecting layer coating liquid for use;
[0039] The connecting layer is composed of the following components in the indicated parts by weight:
[0041] (3) Preparation of chromogenic layer coating solution: add water to the chromogenic layer batching tank, start stirring, add dispersant, defoamer, col...
Embodiment 2
[0049] As mentioned above, the hot water resistant BOPP thermal film manufacturing process includes the following steps:
[0050] (1) Choose BOPP film with two smooth surfaces as the coating substrate, and the weight is 65g / m 2 ;
[0051] (2) Preparation of connecting layer coating solution: Add appropriate amount of water into the batching tank, start stirring, add hydroxyl-containing self-crosslinking acrylate emulsion, CMC, defoamer, lubricant, polyisocyanate, and stir for 20 minutes under low-speed stirring conditions , forming a connecting layer coating liquid for use;
[0052] The connecting layer is composed of the following components in the indicated parts by weight:
[0054] (3) Preparation of chromogenic layer coating solution: add water to the chromogenic layer batching tank, start stirring, add dispersant, defoamer, col...
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Abstract
The invention discloses a hot water-resistant biaxially oriented polypropylene (BOPP) thermosensitive film and a manufacturing method thereof. The BOPP thermosensitive film comprises a BOPP base film,a connecting layer, a color development layer and a protective layer, wherein the connecting layer, the color development layer and the protective layer are sequentially arranged on the BOPP base film. The preparation method of the hot water-resistant BOPP thermosensitive film comprises the following steps: (1) selecting a BOPP film with two glossy surfaces as a coating base material; (2) preparing a coating liquid of the connecting layer; (3) preparing a coating liquid of the color development layer; (4) preparing a coating liquid of the protective layer; and (5) separately pumping the coating liquids into a material tank of a coating machine, and sequentially coating the paper base material with the connecting layer, the color development layer and the protective layer by adopting a metering rod coating method. The product coating disclosed by the invention has extremely high surface strength, excellent dry-wet friction resistance and excellent hot water resistance, and can be usedin hot water or hot steam. According to the connecting layer disclosed by the invention, double components of hydroxyl-containing self-crosslinked acrylate and polyisocyanate are used for crosslinkingand film forming, the combination firmness of the BOPP film with the color development layer is enhanced, and a hot water-resistant effect is achieved.
Description
technical field [0001] The invention relates to the technical field of heat-sensitive materials, in particular to a heat-resistant BOPP heat-sensitive film and a manufacturing method thereof. Background technique [0002] With the wide use of heat-sensitive materials in various fields of life, the use of heat-sensitive films is also constantly expanding. [0003] At present, some cooked food processing processes in the market need to be sterilized with high-temperature hot water. The product labels used cannot use heat-sensitive paper, and generally use heat-sensitive labels with BOPP base film. Some restaurants heat drinks in hot water with cups. High-temperature water disinfection or heating process is required for BOPP film heat-sensitive labels to be firmly coated in high-temperature water, and the heat-sensitive coating should not change color significantly to affect the recognition of barcodes and characters. [0004] After thermal printing, the color-developing subs...
Claims
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