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Flexible fibrous surface-treating article with low formaldehyde off-gassing

A technology for surface treatment and flexible fibers, which is applied in the field of preparing flexible fiber surface treatment products and can solve problems such as formaldehyde emission

Inactive Publication Date: 2019-03-01
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Binder systems currently used in commercial floor mat products often result in formaldehyde emissions after the product is manufactured

Method used

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  • Flexible fibrous surface-treating article with low formaldehyde off-gassing
  • Flexible fibrous surface-treating article with low formaldehyde off-gassing
  • Flexible fibrous surface-treating article with low formaldehyde off-gassing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1: Preparation of floor mats

[0053] The webs were formed using a conventional web making machine (trade designation "Rando Webber"). The resulting web was a blend of fibers comprising 75% by weight crimped polyethylene terephthalate ("PET") staple fibers (50 denier, 58 mm long) and 25% by weight crimped sheath Core-type melt-bondable polyester staple fiber (15 denier, 58 mm long; with a core of polyethylene terephthalate and a copolymer of polyethylene terephthalate and isophthalate the skin of the object). The formed web was heated in a convection oven at 320°F (160°C) for about 3 minutes to fuse the melt-bondable fibers together at the intersection points to form a pre-bonded web. The prebonded web weight was about 400 grams per square meter.

[0054] Samples of the prebonded web were cut to dimensions of 1 x 7 inches in the crossweb direction (ie, where the long dimension ran sideways across the web as it was manufactured, rather than the longitudinal ...

Embodiment 2

[0058] Example 2: Formaldehyde emission .

[0059] The formaldehyde emission of the samples prepared in Example 1 was measured. Emissions were measured by reaction with 2,4-dinitrophenylhydrazine [DNPH] to form the corresponding hydrazone, which is easily and sensitively detected by liquid chromatography. A sampling tube containing silica gel impregnated with 2,4-DNPH was placed on a heated microchamber device (Marks microchamber) with a volume of 44 mL, and the coated Covered nonwoven samples were placed therein. The sample was heated to 65 °C (150 °F) for 30 minutes with a flow of helium at 50 mL / min through the sample chamber and into the collection tube. The tube was then cut open and desorbed with 5 mL of acetonitrile, and the extraction solution was run through HPLC. The formaldehyde-DNPH content was determined from a standard calibration curve, and the formaldehyde concentration was calculated by multiplying the formaldehyde-DNPH result by the molecular weight rati...

Embodiment 3

[0065] Example 3: Physical properties at room temperature .

[0066] The maximum load and tensile modulus of the samples prepared in Example 1 were measured at room temperature. Tensile characterizations were performed on an Instron testing machine (model 59CP) using Bluehill 3 analysis software. Maximum load and modulus were determined at a throat flow rate of 10 inches / minute. Sample testing was performed in triplicate.

[0067] The maximum load and tensile modulus of the samples are given in Table 4. Table 5 describes the change in maximum loading caused by crosslinker compared to the condition without crosslinker. figure 2 The maximum loading of the sample at room temperature is shown.

[0068] Table 4: Maximum load and tensile modulus of samples at room temperature .

[0069]

[0070]

[0071] Table 5: Changes in maximum loading of samples at room temperature due to cross-linking agents .

[0072]

[0073] Table 6 describes the change in tensile modu...

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Abstract

Various embodiments disclosed related to flexible fibrous surface-treating articles with low formaldehyde off-gassing. In various embodiments, the present invention provides a flexible fibrous surface-treating article including an open, lofty, nonwoven web including fibers. The flexible fibrous surface-treating article also includes a binder that coats the fibers of the nonwoven web. The binder includes a cured product of a curable composition including a latex and a crosslinker. The flexible fibrous surface-treating article heated to 65 DEG C in a closed space for 30 minutes emits less than about 6 micrograms of gaseous formaldehyde total per gram of the flexible fibrous surface-treating article.

Description

Background technique [0001] Lofty, resilient open-cell nonwoven three-dimensional abrasive articles are useful for cleaning and polishing floors and other surfaces. The binder systems currently used in commercial floor mat products often result in formaldehyde emissions after the product is manufactured. Formaldehyde has a distinctive smell and is highly toxic to all animals. Emitted formaldehyde may be a component of the binder system or a by-product of the cured binder system. Alternative binder systems with lower formaldehyde emissions suffer from reduced physical properties, such as strength and tensile modulus, under dry, wet or hot conditions. Contents of the invention [0002] In various embodiments, the present invention provides flexible fibrous surface treatment articles comprising an open celled, lofty, nonwoven web comprising fibers. The flexible fibrous surface treatment article also includes a binder coating the fibers of the nonwoven web. The binder is the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/58D04H1/64D06M15/00
CPCD04H1/587D04H1/64D06M15/263D06M15/564D06M15/693D06M2101/32C08C19/36C08K5/29D04H1/435
Inventor 戈登·L·阿尔特舒勒台会文杰西·D·伦德
Owner 3M INNOVATIVE PROPERTIES CO
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